diff --git a/cryptfs.cpp b/cryptfs.cpp
new file mode 100644
index 0000000..f2f0f18
--- /dev/null
+++ b/cryptfs.cpp
@@ -0,0 +1,3581 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* TO DO:
+ *   1.  Perhaps keep several copies of the encrypted key, in case something
+ *       goes horribly wrong?
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <linux/dm-ioctl.h>
+#include <libgen.h>
+#include <stdlib.h>
+#include <sys/param.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <openssl/evp.h>
+#include <openssl/sha.h>
+#include <errno.h>
+#include <ext4_utils/ext4.h>
+#include <ext4_utils/ext4_utils.h>
+#include <linux/kdev_t.h>
+#include <fs_mgr.h>
+#include <time.h>
+#include <math.h>
+#include <selinux/selinux.h>
+#include "cryptfs.h"
+#include "secontext.h"
+#define LOG_TAG "Cryptfs"
+#include "cutils/log.h"
+#include "cutils/properties.h"
+#include "cutils/android_reboot.h"
+#include "hardware_legacy/power.h"
+#include <logwrap/logwrap.h>
+#include "ScryptParameters.h"
+#include "VolumeManager.h"
+#include "VoldUtil.h"
+#include "Ext4Crypt.h"
+#include "f2fs_sparseblock.h"
+#include "CheckBattery.h"
+#include "Process.h"
+#include "Keymaster.h"
+#include "android-base/properties.h"
+#include <bootloader_message/bootloader_message.h>
+extern "C" {
+#include <crypto_scrypt.h>
+}
+
+#define UNUSED __attribute__((unused))
+
+#define DM_CRYPT_BUF_SIZE 4096
+
+#define HASH_COUNT 2000
+#define KEY_LEN_BYTES 16
+#define IV_LEN_BYTES 16
+
+#define KEY_IN_FOOTER  "footer"
+
+#define DEFAULT_PASSWORD "default_password"
+
+#define CRYPTO_BLOCK_DEVICE "userdata"
+
+#define BREADCRUMB_FILE "/data/misc/vold/convert_fde"
+
+#define EXT4_FS 1
+#define F2FS_FS 2
+
+#define TABLE_LOAD_RETRIES 10
+
+#define RSA_KEY_SIZE 2048
+#define RSA_KEY_SIZE_BYTES (RSA_KEY_SIZE / 8)
+#define RSA_EXPONENT 0x10001
+#define KEYMASTER_CRYPTFS_RATE_LIMIT 1  // Maximum one try per second
+
+#define RETRY_MOUNT_ATTEMPTS 10
+#define RETRY_MOUNT_DELAY_SECONDS 1
+
+static unsigned char saved_master_key[KEY_LEN_BYTES];
+static char *saved_mount_point;
+static int  master_key_saved = 0;
+static struct crypt_persist_data *persist_data = NULL;
+
+/* Should we use keymaster? */
+static int keymaster_check_compatibility()
+{
+    return keymaster_compatibility_cryptfs_scrypt();
+}
+
+/* Create a new keymaster key and store it in this footer */
+static int keymaster_create_key(struct crypt_mnt_ftr *ftr)
+{
+    if (ftr->keymaster_blob_size) {
+        SLOGI("Already have key");
+        return 0;
+    }
+
+    int rc = keymaster_create_key_for_cryptfs_scrypt(RSA_KEY_SIZE, RSA_EXPONENT,
+            KEYMASTER_CRYPTFS_RATE_LIMIT, ftr->keymaster_blob, KEYMASTER_BLOB_SIZE,
+            &ftr->keymaster_blob_size);
+    if (rc) {
+        if (ftr->keymaster_blob_size > KEYMASTER_BLOB_SIZE) {
+            SLOGE("Keymaster key blob to large)");
+            ftr->keymaster_blob_size = 0;
+        }
+        SLOGE("Failed to generate keypair");
+        return -1;
+    }
+    return 0;
+}
+
+/* This signs the given object using the keymaster key. */
+static int keymaster_sign_object(struct crypt_mnt_ftr *ftr,
+                                 const unsigned char *object,
+                                 const size_t object_size,
+                                 unsigned char **signature,
+                                 size_t *signature_size)
+{
+    unsigned char to_sign[RSA_KEY_SIZE_BYTES];
+    size_t to_sign_size = sizeof(to_sign);
+    memset(to_sign, 0, RSA_KEY_SIZE_BYTES);
+
+    // To sign a message with RSA, the message must satisfy two
+    // constraints:
+    //
+    // 1. The message, when interpreted as a big-endian numeric value, must
+    //    be strictly less than the public modulus of the RSA key.  Note
+    //    that because the most significant bit of the public modulus is
+    //    guaranteed to be 1 (else it's an (n-1)-bit key, not an n-bit
+    //    key), an n-bit message with most significant bit 0 always
+    //    satisfies this requirement.
+    //
+    // 2. The message must have the same length in bits as the public
+    //    modulus of the RSA key.  This requirement isn't mathematically
+    //    necessary, but is necessary to ensure consistency in
+    //    implementations.
+    switch (ftr->kdf_type) {
+        case KDF_SCRYPT_KEYMASTER:
+            // This ensures the most significant byte of the signed message
+            // is zero.  We could have zero-padded to the left instead, but
+            // this approach is slightly more robust against changes in
+            // object size.  However, it's still broken (but not unusably
+            // so) because we really should be using a proper deterministic
+            // RSA padding function, such as PKCS1.
+            memcpy(to_sign + 1, object, std::min((size_t)RSA_KEY_SIZE_BYTES - 1, object_size));
+            SLOGI("Signing safely-padded object");
+            break;
+        default:
+            SLOGE("Unknown KDF type %d", ftr->kdf_type);
+            return -1;
+    }
+    return keymaster_sign_object_for_cryptfs_scrypt(ftr->keymaster_blob, ftr->keymaster_blob_size,
+            KEYMASTER_CRYPTFS_RATE_LIMIT, to_sign, to_sign_size, signature, signature_size);
+}
+
+/* Store password when userdata is successfully decrypted and mounted.
+ * Cleared by cryptfs_clear_password
+ *
+ * To avoid a double prompt at boot, we need to store the CryptKeeper
+ * password and pass it to KeyGuard, which uses it to unlock KeyStore.
+ * Since the entire framework is torn down and rebuilt after encryption,
+ * we have to use a daemon or similar to store the password. Since vold
+ * is secured against IPC except from system processes, it seems a reasonable
+ * place to store this.
+ *
+ * password should be cleared once it has been used.
+ *
+ * password is aged out after password_max_age_seconds seconds.
+ */
+static char* password = 0;
+static int password_expiry_time = 0;
+static const int password_max_age_seconds = 60;
+
+extern struct fstab *fstab;
+
+enum RebootType {reboot, recovery, shutdown};
+static void cryptfs_reboot(enum RebootType rt)
+{
+  switch(rt) {
+      case reboot:
+          property_set(ANDROID_RB_PROPERTY, "reboot");
+          break;
+
+      case recovery:
+          property_set(ANDROID_RB_PROPERTY, "reboot,recovery");
+          break;
+
+      case shutdown:
+          property_set(ANDROID_RB_PROPERTY, "shutdown");
+          break;
+    }
+
+    sleep(20);
+
+    /* Shouldn't get here, reboot should happen before sleep times out */
+    return;
+}
+
+static void ioctl_init(struct dm_ioctl *io, size_t dataSize, const char *name, unsigned flags)
+{
+    memset(io, 0, dataSize);
+    io->data_size = dataSize;
+    io->data_start = sizeof(struct dm_ioctl);
+    io->version[0] = 4;
+    io->version[1] = 0;
+    io->version[2] = 0;
+    io->flags = flags;
+    if (name) {
+        strlcpy(io->name, name, sizeof(io->name));
+    }
+}
+
+/**
+ * Gets the default device scrypt parameters for key derivation time tuning.
+ * The parameters should lead to about one second derivation time for the
+ * given device.
+ */
+static void get_device_scrypt_params(struct crypt_mnt_ftr *ftr) {
+    char paramstr[PROPERTY_VALUE_MAX];
+    int Nf, rf, pf;
+
+    property_get(SCRYPT_PROP, paramstr, SCRYPT_DEFAULTS);
+    if (!parse_scrypt_parameters(paramstr, &Nf, &rf, &pf)) {
+        SLOGW("bad scrypt parameters '%s' should be like '12:8:1'; using defaults", paramstr);
+        parse_scrypt_parameters(SCRYPT_DEFAULTS, &Nf, &rf, &pf);
+    }
+    ftr->N_factor = Nf;
+    ftr->r_factor = rf;
+    ftr->p_factor = pf;
+}
+
+static unsigned int get_fs_size(char *dev)
+{
+    int fd, block_size;
+    struct ext4_super_block sb;
+    off64_t len;
+
+    if ((fd = open(dev, O_RDONLY|O_CLOEXEC)) < 0) {
+        SLOGE("Cannot open device to get filesystem size ");
+        return 0;
+    }
+
+    if (lseek64(fd, 1024, SEEK_SET) < 0) {
+        SLOGE("Cannot seek to superblock");
+        return 0;
+    }
+
+    if (read(fd, &sb, sizeof(sb)) != sizeof(sb)) {
+        SLOGE("Cannot read superblock");
+        return 0;
+    }
+
+    close(fd);
+
+    if (le32_to_cpu(sb.s_magic) != EXT4_SUPER_MAGIC) {
+        SLOGE("Not a valid ext4 superblock");
+        return 0;
+    }
+    block_size = 1024 << sb.s_log_block_size;
+    /* compute length in bytes */
+    len = ( ((off64_t)sb.s_blocks_count_hi << 32) + sb.s_blocks_count_lo) * block_size;
+
+    /* return length in sectors */
+    return (unsigned int) (len / 512);
+}
+
+static int get_crypt_ftr_info(char **metadata_fname, off64_t *off)
+{
+  static int cached_data = 0;
+  static off64_t cached_off = 0;
+  static char cached_metadata_fname[PROPERTY_VALUE_MAX] = "";
+  int fd;
+  char key_loc[PROPERTY_VALUE_MAX];
+  char real_blkdev[PROPERTY_VALUE_MAX];
+  int rc = -1;
+
+  if (!cached_data) {
+    fs_mgr_get_crypt_info(fstab, key_loc, real_blkdev, sizeof(key_loc));
+
+    if (!strcmp(key_loc, KEY_IN_FOOTER)) {
+      if ( (fd = open(real_blkdev, O_RDWR|O_CLOEXEC)) < 0) {
+        SLOGE("Cannot open real block device %s\n", real_blkdev);
+        return -1;
+      }
+
+      unsigned long nr_sec = 0;
+      get_blkdev_size(fd, &nr_sec);
+      if (nr_sec != 0) {
+        /* If it's an encrypted Android partition, the last 16 Kbytes contain the
+         * encryption info footer and key, and plenty of bytes to spare for future
+         * growth.
+         */
+        strlcpy(cached_metadata_fname, real_blkdev, sizeof(cached_metadata_fname));
+        cached_off = ((off64_t)nr_sec * 512) - CRYPT_FOOTER_OFFSET;
+        cached_data = 1;
+      } else {
+        SLOGE("Cannot get size of block device %s\n", real_blkdev);
+      }
+      close(fd);
+    } else {
+      strlcpy(cached_metadata_fname, key_loc, sizeof(cached_metadata_fname));
+      cached_off = 0;
+      cached_data = 1;
+    }
+  }
+
+  if (cached_data) {
+    if (metadata_fname) {
+        *metadata_fname = cached_metadata_fname;
+    }
+    if (off) {
+        *off = cached_off;
+    }
+    rc = 0;
+  }
+
+  return rc;
+}
+
+/* Set sha256 checksum in structure */
+static void set_ftr_sha(struct crypt_mnt_ftr *crypt_ftr)
+{
+    SHA256_CTX c;
+    SHA256_Init(&c);
+    memset(crypt_ftr->sha256, 0, sizeof(crypt_ftr->sha256));
+    SHA256_Update(&c, crypt_ftr, sizeof(*crypt_ftr));
+    SHA256_Final(crypt_ftr->sha256, &c);
+}
+
+/* key or salt can be NULL, in which case just skip writing that value.  Useful to
+ * update the failed mount count but not change the key.
+ */
+static int put_crypt_ftr_and_key(struct crypt_mnt_ftr *crypt_ftr)
+{
+  int fd;
+  unsigned int cnt;
+  /* starting_off is set to the SEEK_SET offset
+   * where the crypto structure starts
+   */
+  off64_t starting_off;
+  int rc = -1;
+  char *fname = NULL;
+  struct stat statbuf;
+
+  set_ftr_sha(crypt_ftr);
+
+  if (get_crypt_ftr_info(&fname, &starting_off)) {
+    SLOGE("Unable to get crypt_ftr_info\n");
+    return -1;
+  }
+  if (fname[0] != '/') {
+    SLOGE("Unexpected value for crypto key location\n");
+    return -1;
+  }
+  if ( (fd = open(fname, O_RDWR | O_CREAT|O_CLOEXEC, 0600)) < 0) {
+    SLOGE("Cannot open footer file %s for put\n", fname);
+    return -1;
+  }
+
+  /* Seek to the start of the crypt footer */
+  if (lseek64(fd, starting_off, SEEK_SET) == -1) {
+    SLOGE("Cannot seek to real block device footer\n");
+    goto errout;
+  }
+
+  if ((cnt = write(fd, crypt_ftr, sizeof(struct crypt_mnt_ftr))) != sizeof(struct crypt_mnt_ftr)) {
+    SLOGE("Cannot write real block device footer\n");
+    goto errout;
+  }
+
+  fstat(fd, &statbuf);
+  /* If the keys are kept on a raw block device, do not try to truncate it. */
+  if (S_ISREG(statbuf.st_mode)) {
+    if (ftruncate(fd, 0x4000)) {
+      SLOGE("Cannot set footer file size\n");
+      goto errout;
+    }
+  }
+
+  /* Success! */
+  rc = 0;
+
+errout:
+  close(fd);
+  return rc;
+
+}
+
+static bool check_ftr_sha(const struct crypt_mnt_ftr *crypt_ftr)
+{
+    struct crypt_mnt_ftr copy;
+    memcpy(&copy, crypt_ftr, sizeof(copy));
+    set_ftr_sha(&copy);
+    return memcmp(copy.sha256, crypt_ftr->sha256, sizeof(copy.sha256)) == 0;
+}
+
+static inline int unix_read(int  fd, void*  buff, int  len)
+{
+    return TEMP_FAILURE_RETRY(read(fd, buff, len));
+}
+
+static inline int unix_write(int  fd, const void*  buff, int  len)
+{
+    return TEMP_FAILURE_RETRY(write(fd, buff, len));
+}
+
+static void init_empty_persist_data(struct crypt_persist_data *pdata, int len)
+{
+    memset(pdata, 0, len);
+    pdata->persist_magic = PERSIST_DATA_MAGIC;
+    pdata->persist_valid_entries = 0;
+}
+
+/* A routine to update the passed in crypt_ftr to the lastest version.
+ * fd is open read/write on the device that holds the crypto footer and persistent
+ * data, crypt_ftr is a pointer to the struct to be updated, and offset is the
+ * absolute offset to the start of the crypt_mnt_ftr on the passed in fd.
+ */
+static void upgrade_crypt_ftr(int fd, struct crypt_mnt_ftr *crypt_ftr, off64_t offset)
+{
+    int orig_major = crypt_ftr->major_version;
+    int orig_minor = crypt_ftr->minor_version;
+
+    if ((crypt_ftr->major_version == 1) && (crypt_ftr->minor_version == 0)) {
+        struct crypt_persist_data *pdata;
+        off64_t pdata_offset = offset + CRYPT_FOOTER_TO_PERSIST_OFFSET;
+
+        SLOGW("upgrading crypto footer to 1.1");
+
+        pdata = (crypt_persist_data *)malloc(CRYPT_PERSIST_DATA_SIZE);
+        if (pdata == NULL) {
+            SLOGE("Cannot allocate persisent data\n");
+            return;
+        }
+        memset(pdata, 0, CRYPT_PERSIST_DATA_SIZE);
+
+        /* Need to initialize the persistent data area */
+        if (lseek64(fd, pdata_offset, SEEK_SET) == -1) {
+            SLOGE("Cannot seek to persisent data offset\n");
+            free(pdata);
+            return;
+        }
+        /* Write all zeros to the first copy, making it invalid */
+        unix_write(fd, pdata, CRYPT_PERSIST_DATA_SIZE);
+
+        /* Write a valid but empty structure to the second copy */
+        init_empty_persist_data(pdata, CRYPT_PERSIST_DATA_SIZE);
+        unix_write(fd, pdata, CRYPT_PERSIST_DATA_SIZE);
+
+        /* Update the footer */
+        crypt_ftr->persist_data_size = CRYPT_PERSIST_DATA_SIZE;
+        crypt_ftr->persist_data_offset[0] = pdata_offset;
+        crypt_ftr->persist_data_offset[1] = pdata_offset + CRYPT_PERSIST_DATA_SIZE;
+        crypt_ftr->minor_version = 1;
+        free(pdata);
+    }
+
+    if ((crypt_ftr->major_version == 1) && (crypt_ftr->minor_version == 1)) {
+        SLOGW("upgrading crypto footer to 1.2");
+        /* But keep the old kdf_type.
+         * It will get updated later to KDF_SCRYPT after the password has been verified.
+         */
+        crypt_ftr->kdf_type = KDF_PBKDF2;
+        get_device_scrypt_params(crypt_ftr);
+        crypt_ftr->minor_version = 2;
+    }
+
+    if ((crypt_ftr->major_version == 1) && (crypt_ftr->minor_version == 2)) {
+        SLOGW("upgrading crypto footer to 1.3");
+        crypt_ftr->crypt_type = CRYPT_TYPE_PASSWORD;
+        crypt_ftr->minor_version = 3;
+    }
+
+    if ((orig_major != crypt_ftr->major_version) || (orig_minor != crypt_ftr->minor_version)) {
+        if (lseek64(fd, offset, SEEK_SET) == -1) {
+            SLOGE("Cannot seek to crypt footer\n");
+            return;
+        }
+        unix_write(fd, crypt_ftr, sizeof(struct crypt_mnt_ftr));
+    }
+}
+
+
+static int get_crypt_ftr_and_key(struct crypt_mnt_ftr *crypt_ftr)
+{
+  int fd;
+  unsigned int cnt;
+  off64_t starting_off;
+  int rc = -1;
+  char *fname = NULL;
+  struct stat statbuf;
+
+  if (get_crypt_ftr_info(&fname, &starting_off)) {
+    SLOGE("Unable to get crypt_ftr_info\n");
+    return -1;
+  }
+  if (fname[0] != '/') {
+    SLOGE("Unexpected value for crypto key location\n");
+    return -1;
+  }
+  if ( (fd = open(fname, O_RDWR|O_CLOEXEC)) < 0) {
+    SLOGE("Cannot open footer file %s for get\n", fname);
+    return -1;
+  }
+
+  /* Make sure it's 16 Kbytes in length */
+  fstat(fd, &statbuf);
+  if (S_ISREG(statbuf.st_mode) && (statbuf.st_size != 0x4000)) {
+    SLOGE("footer file %s is not the expected size!\n", fname);
+    goto errout;
+  }
+
+  /* Seek to the start of the crypt footer */
+  if (lseek64(fd, starting_off, SEEK_SET) == -1) {
+    SLOGE("Cannot seek to real block device footer\n");
+    goto errout;
+  }
+
+  if ( (cnt = read(fd, crypt_ftr, sizeof(struct crypt_mnt_ftr))) != sizeof(struct crypt_mnt_ftr)) {
+    SLOGE("Cannot read real block device footer\n");
+    goto errout;
+  }
+
+  if (crypt_ftr->magic != CRYPT_MNT_MAGIC) {
+    SLOGE("Bad magic for real block device %s\n", fname);
+    goto errout;
+  }
+
+  if (crypt_ftr->major_version != CURRENT_MAJOR_VERSION) {
+    SLOGE("Cannot understand major version %d real block device footer; expected %d\n",
+          crypt_ftr->major_version, CURRENT_MAJOR_VERSION);
+    goto errout;
+  }
+
+  if (crypt_ftr->minor_version > CURRENT_MINOR_VERSION) {
+    SLOGW("Warning: crypto footer minor version %d, expected <= %d, continuing...\n",
+          crypt_ftr->minor_version, CURRENT_MINOR_VERSION);
+  }
+
+  /* If this is a verion 1.0 crypt_ftr, make it a 1.1 crypt footer, and update the
+   * copy on disk before returning.
+   */
+  if (crypt_ftr->minor_version < CURRENT_MINOR_VERSION) {
+    upgrade_crypt_ftr(fd, crypt_ftr, starting_off);
+  }
+
+  /* Success! */
+  rc = 0;
+
+errout:
+  close(fd);
+  return rc;
+}
+
+static int validate_persistent_data_storage(struct crypt_mnt_ftr *crypt_ftr)
+{
+    if (crypt_ftr->persist_data_offset[0] + crypt_ftr->persist_data_size >
+        crypt_ftr->persist_data_offset[1]) {
+        SLOGE("Crypt_ftr persist data regions overlap");
+        return -1;
+    }
+
+    if (crypt_ftr->persist_data_offset[0] >= crypt_ftr->persist_data_offset[1]) {
+        SLOGE("Crypt_ftr persist data region 0 starts after region 1");
+        return -1;
+    }
+
+    if (((crypt_ftr->persist_data_offset[1] + crypt_ftr->persist_data_size) -
+        (crypt_ftr->persist_data_offset[0] - CRYPT_FOOTER_TO_PERSIST_OFFSET)) >
+        CRYPT_FOOTER_OFFSET) {
+        SLOGE("Persistent data extends past crypto footer");
+        return -1;
+    }
+
+    return 0;
+}
+
+static int load_persistent_data(void)
+{
+    struct crypt_mnt_ftr crypt_ftr;
+    struct crypt_persist_data *pdata = NULL;
+    char encrypted_state[PROPERTY_VALUE_MAX];
+    char *fname;
+    int found = 0;
+    int fd;
+    int ret;
+    int i;
+
+    if (persist_data) {
+        /* Nothing to do, we've already loaded or initialized it */
+        return 0;
+    }
+
+
+    /* If not encrypted, just allocate an empty table and initialize it */
+    property_get("ro.crypto.state", encrypted_state, "");
+    if (strcmp(encrypted_state, "encrypted") ) {
+        pdata = (crypt_persist_data*)malloc(CRYPT_PERSIST_DATA_SIZE);
+        if (pdata) {
+            init_empty_persist_data(pdata, CRYPT_PERSIST_DATA_SIZE);
+            persist_data = pdata;
+            return 0;
+        }
+        return -1;
+    }
+
+    if(get_crypt_ftr_and_key(&crypt_ftr)) {
+        return -1;
+    }
+
+    if ((crypt_ftr.major_version < 1)
+        || (crypt_ftr.major_version == 1 && crypt_ftr.minor_version < 1)) {
+        SLOGE("Crypt_ftr version doesn't support persistent data");
+        return -1;
+    }
+
+    if (get_crypt_ftr_info(&fname, NULL)) {
+        return -1;
+    }
+
+    ret = validate_persistent_data_storage(&crypt_ftr);
+    if (ret) {
+        return -1;
+    }
+
+    fd = open(fname, O_RDONLY|O_CLOEXEC);
+    if (fd < 0) {
+        SLOGE("Cannot open %s metadata file", fname);
+        return -1;
+    }
+
+    pdata = (crypt_persist_data*)malloc(crypt_ftr.persist_data_size);
+    if (pdata == NULL) {
+        SLOGE("Cannot allocate memory for persistent data");
+        goto err;
+    }
+
+    for (i = 0; i < 2; i++) {
+        if (lseek64(fd, crypt_ftr.persist_data_offset[i], SEEK_SET) < 0) {
+            SLOGE("Cannot seek to read persistent data on %s", fname);
+            goto err2;
+        }
+        if (unix_read(fd, pdata, crypt_ftr.persist_data_size) < 0){
+            SLOGE("Error reading persistent data on iteration %d", i);
+            goto err2;
+        }
+        if (pdata->persist_magic == PERSIST_DATA_MAGIC) {
+            found = 1;
+            break;
+        }
+    }
+
+    if (!found) {
+        SLOGI("Could not find valid persistent data, creating");
+        init_empty_persist_data(pdata, crypt_ftr.persist_data_size);
+    }
+
+    /* Success */
+    persist_data = pdata;
+    close(fd);
+    return 0;
+
+err2:
+    free(pdata);
+
+err:
+    close(fd);
+    return -1;
+}
+
+static int save_persistent_data(void)
+{
+    struct crypt_mnt_ftr crypt_ftr;
+    struct crypt_persist_data *pdata;
+    char *fname;
+    off64_t write_offset;
+    off64_t erase_offset;
+    int fd;
+    int ret;
+
+    if (persist_data == NULL) {
+        SLOGE("No persistent data to save");
+        return -1;
+    }
+
+    if(get_crypt_ftr_and_key(&crypt_ftr)) {
+        return -1;
+    }
+
+    if ((crypt_ftr.major_version < 1)
+        || (crypt_ftr.major_version == 1 && crypt_ftr.minor_version < 1)) {
+        SLOGE("Crypt_ftr version doesn't support persistent data");
+        return -1;
+    }
+
+    ret = validate_persistent_data_storage(&crypt_ftr);
+    if (ret) {
+        return -1;
+    }
+
+    if (get_crypt_ftr_info(&fname, NULL)) {
+        return -1;
+    }
+
+    fd = open(fname, O_RDWR|O_CLOEXEC);
+    if (fd < 0) {
+        SLOGE("Cannot open %s metadata file", fname);
+        return -1;
+    }
+
+    pdata = (crypt_persist_data*)malloc(crypt_ftr.persist_data_size);
+    if (pdata == NULL) {
+        SLOGE("Cannot allocate persistant data");
+        goto err;
+    }
+
+    if (lseek64(fd, crypt_ftr.persist_data_offset[0], SEEK_SET) < 0) {
+        SLOGE("Cannot seek to read persistent data on %s", fname);
+        goto err2;
+    }
+
+    if (unix_read(fd, pdata, crypt_ftr.persist_data_size) < 0) {
+            SLOGE("Error reading persistent data before save");
+            goto err2;
+    }
+
+    if (pdata->persist_magic == PERSIST_DATA_MAGIC) {
+        /* The first copy is the curent valid copy, so write to
+         * the second copy and erase this one */
+       write_offset = crypt_ftr.persist_data_offset[1];
+       erase_offset = crypt_ftr.persist_data_offset[0];
+    } else {
+        /* The second copy must be the valid copy, so write to
+         * the first copy, and erase the second */
+       write_offset = crypt_ftr.persist_data_offset[0];
+       erase_offset = crypt_ftr.persist_data_offset[1];
+    }
+
+    /* Write the new copy first, if successful, then erase the old copy */
+    if (lseek64(fd, write_offset, SEEK_SET) < 0) {
+        SLOGE("Cannot seek to write persistent data");
+        goto err2;
+    }
+    if (unix_write(fd, persist_data, crypt_ftr.persist_data_size) ==
+        (int) crypt_ftr.persist_data_size) {
+        if (lseek64(fd, erase_offset, SEEK_SET) < 0) {
+            SLOGE("Cannot seek to erase previous persistent data");
+            goto err2;
+        }
+        fsync(fd);
+        memset(pdata, 0, crypt_ftr.persist_data_size);
+        if (unix_write(fd, pdata, crypt_ftr.persist_data_size) !=
+            (int) crypt_ftr.persist_data_size) {
+            SLOGE("Cannot write to erase previous persistent data");
+            goto err2;
+        }
+        fsync(fd);
+    } else {
+        SLOGE("Cannot write to save persistent data");
+        goto err2;
+    }
+
+    /* Success */
+    free(pdata);
+    close(fd);
+    return 0;
+
+err2:
+    free(pdata);
+err:
+    close(fd);
+    return -1;
+}
+
+/* Convert a binary key of specified length into an ascii hex string equivalent,
+ * without the leading 0x and with null termination
+ */
+static void convert_key_to_hex_ascii(const unsigned char *master_key,
+                                     unsigned int keysize, char *master_key_ascii) {
+    unsigned int i, a;
+    unsigned char nibble;
+
+    for (i=0, a=0; i<keysize; i++, a+=2) {
+        /* For each byte, write out two ascii hex digits */
+        nibble = (master_key[i] >> 4) & 0xf;
+        master_key_ascii[a] = nibble + (nibble > 9 ? 0x37 : 0x30);
+
+        nibble = master_key[i] & 0xf;
+        master_key_ascii[a+1] = nibble + (nibble > 9 ? 0x37 : 0x30);
+    }
+
+    /* Add the null termination */
+    master_key_ascii[a] = '\0';
+
+}
+
+static int load_crypto_mapping_table(struct crypt_mnt_ftr *crypt_ftr,
+        const unsigned char *master_key, const char *real_blk_name,
+        const char *name, int fd, const char *extra_params) {
+  alignas(struct dm_ioctl) char buffer[DM_CRYPT_BUF_SIZE];
+  struct dm_ioctl *io;
+  struct dm_target_spec *tgt;
+  char *crypt_params;
+  char master_key_ascii[129]; /* Large enough to hold 512 bit key and null */
+  size_t buff_offset;
+  int i;
+
+  io = (struct dm_ioctl *) buffer;
+
+  /* Load the mapping table for this device */
+  tgt = (struct dm_target_spec *) &buffer[sizeof(struct dm_ioctl)];
+
+  ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+  io->target_count = 1;
+  tgt->status = 0;
+  tgt->sector_start = 0;
+  tgt->length = crypt_ftr->fs_size;
+  strlcpy(tgt->target_type, "crypt", DM_MAX_TYPE_NAME);
+
+  crypt_params = buffer + sizeof(struct dm_ioctl) + sizeof(struct dm_target_spec);
+  convert_key_to_hex_ascii(master_key, crypt_ftr->keysize, master_key_ascii);
+
+  buff_offset = crypt_params - buffer;
+  snprintf(crypt_params, sizeof(buffer) - buff_offset, "%s %s 0 %s 0 %s",
+           crypt_ftr->crypto_type_name, master_key_ascii, real_blk_name,
+           extra_params);
+  crypt_params += strlen(crypt_params) + 1;
+  crypt_params = (char *) (((unsigned long)crypt_params + 7) & ~8); /* Align to an 8 byte boundary */
+  tgt->next = crypt_params - buffer;
+
+  for (i = 0; i < TABLE_LOAD_RETRIES; i++) {
+    if (! ioctl(fd, DM_TABLE_LOAD, io)) {
+      break;
+    }
+    usleep(500000);
+  }
+
+  if (i == TABLE_LOAD_RETRIES) {
+    /* We failed to load the table, return an error */
+    return -1;
+  } else {
+    return i + 1;
+  }
+}
+
+
+static int get_dm_crypt_version(int fd, const char *name,  int *version)
+{
+    char buffer[DM_CRYPT_BUF_SIZE];
+    struct dm_ioctl *io;
+    struct dm_target_versions *v;
+
+    io = (struct dm_ioctl *) buffer;
+
+    ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+
+    if (ioctl(fd, DM_LIST_VERSIONS, io)) {
+        return -1;
+    }
+
+    /* Iterate over the returned versions, looking for name of "crypt".
+     * When found, get and return the version.
+     */
+    v = (struct dm_target_versions *) &buffer[sizeof(struct dm_ioctl)];
+    while (v->next) {
+        if (! strcmp(v->name, "crypt")) {
+            /* We found the crypt driver, return the version, and get out */
+            version[0] = v->version[0];
+            version[1] = v->version[1];
+            version[2] = v->version[2];
+            return 0;
+        }
+        v = (struct dm_target_versions *)(((char *)v) + v->next);
+    }
+
+    return -1;
+}
+
+static int create_crypto_blk_dev(struct crypt_mnt_ftr *crypt_ftr,
+        const unsigned char *master_key, const char *real_blk_name,
+        char *crypto_blk_name, const char *name) {
+  char buffer[DM_CRYPT_BUF_SIZE];
+  struct dm_ioctl *io;
+  unsigned int minor;
+  int fd=0;
+  int err;
+  int retval = -1;
+  int version[3];
+  const char *extra_params;
+  int load_count;
+
+  if ((fd = open("/dev/device-mapper", O_RDWR|O_CLOEXEC)) < 0 ) {
+    SLOGE("Cannot open device-mapper\n");
+    goto errout;
+  }
+
+  io = (struct dm_ioctl *) buffer;
+
+  ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+  err = ioctl(fd, DM_DEV_CREATE, io);
+  if (err) {
+    SLOGE("Cannot create dm-crypt device %s: %s\n", name, strerror(errno));
+    goto errout;
+  }
+
+  /* Get the device status, in particular, the name of it's device file */
+  ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+  if (ioctl(fd, DM_DEV_STATUS, io)) {
+    SLOGE("Cannot retrieve dm-crypt device status\n");
+    goto errout;
+  }
+  minor = (io->dev & 0xff) | ((io->dev >> 12) & 0xfff00);
+  snprintf(crypto_blk_name, MAXPATHLEN, "/dev/block/dm-%u", minor);
+
+  extra_params = "";
+  if (! get_dm_crypt_version(fd, name, version)) {
+      /* Support for allow_discards was added in version 1.11.0 */
+      if ((version[0] >= 2) ||
+          ((version[0] == 1) && (version[1] >= 11))) {
+          extra_params = "1 allow_discards";
+          SLOGI("Enabling support for allow_discards in dmcrypt.\n");
+      }
+  }
+
+  load_count = load_crypto_mapping_table(crypt_ftr, master_key, real_blk_name, name,
+                                         fd, extra_params);
+  if (load_count < 0) {
+      SLOGE("Cannot load dm-crypt mapping table.\n");
+      goto errout;
+  } else if (load_count > 1) {
+      SLOGI("Took %d tries to load dmcrypt table.\n", load_count);
+  }
+
+  /* Resume this device to activate it */
+  ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+
+  if (ioctl(fd, DM_DEV_SUSPEND, io)) {
+    SLOGE("Cannot resume the dm-crypt device\n");
+    goto errout;
+  }
+
+  /* We made it here with no errors.  Woot! */
+  retval = 0;
+
+errout:
+  close(fd);   /* If fd is <0 from a failed open call, it's safe to just ignore the close error */
+
+  return retval;
+}
+
+static int delete_crypto_blk_dev(const char *name)
+{
+  int fd;
+  char buffer[DM_CRYPT_BUF_SIZE];
+  struct dm_ioctl *io;
+  int retval = -1;
+
+  if ((fd = open("/dev/device-mapper", O_RDWR|O_CLOEXEC)) < 0 ) {
+    SLOGE("Cannot open device-mapper\n");
+    goto errout;
+  }
+
+  io = (struct dm_ioctl *) buffer;
+
+  ioctl_init(io, DM_CRYPT_BUF_SIZE, name, 0);
+  if (ioctl(fd, DM_DEV_REMOVE, io)) {
+    SLOGE("Cannot remove dm-crypt device\n");
+    goto errout;
+  }
+
+  /* We made it here with no errors.  Woot! */
+  retval = 0;
+
+errout:
+  close(fd);    /* If fd is <0 from a failed open call, it's safe to just ignore the close error */
+
+  return retval;
+
+}
+
+static int pbkdf2(const char *passwd, const unsigned char *salt,
+                  unsigned char *ikey, void *params UNUSED)
+{
+    SLOGI("Using pbkdf2 for cryptfs KDF");
+
+    /* Turn the password into a key and IV that can decrypt the master key */
+    return PKCS5_PBKDF2_HMAC_SHA1(passwd, strlen(passwd), salt, SALT_LEN,
+                                  HASH_COUNT, KEY_LEN_BYTES + IV_LEN_BYTES,
+                                  ikey) != 1;
+}
+
+static int scrypt(const char *passwd, const unsigned char *salt,
+                  unsigned char *ikey, void *params)
+{
+    SLOGI("Using scrypt for cryptfs KDF");
+
+    struct crypt_mnt_ftr *ftr = (struct crypt_mnt_ftr *) params;
+
+    int N = 1 << ftr->N_factor;
+    int r = 1 << ftr->r_factor;
+    int p = 1 << ftr->p_factor;
+
+    /* Turn the password into a key and IV that can decrypt the master key */
+    unsigned int keysize;
+    crypto_scrypt((const uint8_t*)passwd, strlen(passwd),
+                  salt, SALT_LEN, N, r, p, ikey,
+                  KEY_LEN_BYTES + IV_LEN_BYTES);
+
+   return 0;
+}
+
+static int scrypt_keymaster(const char *passwd, const unsigned char *salt,
+                            unsigned char *ikey, void *params)
+{
+    SLOGI("Using scrypt with keymaster for cryptfs KDF");
+
+    int rc;
+    size_t signature_size;
+    unsigned char* signature;
+    struct crypt_mnt_ftr *ftr = (struct crypt_mnt_ftr *) params;
+
+    int N = 1 << ftr->N_factor;
+    int r = 1 << ftr->r_factor;
+    int p = 1 << ftr->p_factor;
+
+    rc = crypto_scrypt((const uint8_t*)passwd, strlen(passwd),
+                       salt, SALT_LEN, N, r, p, ikey,
+                       KEY_LEN_BYTES + IV_LEN_BYTES);
+
+    if (rc) {
+        SLOGE("scrypt failed");
+        return -1;
+    }
+
+    if (keymaster_sign_object(ftr, ikey, KEY_LEN_BYTES + IV_LEN_BYTES,
+                              &signature, &signature_size)) {
+        SLOGE("Signing failed");
+        return -1;
+    }
+
+    rc = crypto_scrypt(signature, signature_size, salt, SALT_LEN,
+                       N, r, p, ikey, KEY_LEN_BYTES + IV_LEN_BYTES);
+    free(signature);
+
+    if (rc) {
+        SLOGE("scrypt failed");
+        return -1;
+    }
+
+    return 0;
+}
+
+static int encrypt_master_key(const char *passwd, const unsigned char *salt,
+                              const unsigned char *decrypted_master_key,
+                              unsigned char *encrypted_master_key,
+                              struct crypt_mnt_ftr *crypt_ftr)
+{
+    unsigned char ikey[32+32] = { 0 }; /* Big enough to hold a 256 bit key and 256 bit IV */
+    EVP_CIPHER_CTX e_ctx;
+    int encrypted_len, final_len;
+    int rc = 0;
+
+    /* Turn the password into an intermediate key and IV that can decrypt the master key */
+    get_device_scrypt_params(crypt_ftr);
+
+    switch (crypt_ftr->kdf_type) {
+    case KDF_SCRYPT_KEYMASTER:
+        if (keymaster_create_key(crypt_ftr)) {
+            SLOGE("keymaster_create_key failed");
+            return -1;
+        }
+
+        if (scrypt_keymaster(passwd, salt, ikey, crypt_ftr)) {
+            SLOGE("scrypt failed");
+            return -1;
+        }
+        break;
+
+    case KDF_SCRYPT:
+        if (scrypt(passwd, salt, ikey, crypt_ftr)) {
+            SLOGE("scrypt failed");
+            return -1;
+        }
+        break;
+
+    default:
+        SLOGE("Invalid kdf_type");
+        return -1;
+    }
+
+    /* Initialize the decryption engine */
+    EVP_CIPHER_CTX_init(&e_ctx);
+    if (! EVP_EncryptInit_ex(&e_ctx, EVP_aes_128_cbc(), NULL, ikey, ikey+KEY_LEN_BYTES)) {
+        SLOGE("EVP_EncryptInit failed\n");
+        return -1;
+    }
+    EVP_CIPHER_CTX_set_padding(&e_ctx, 0); /* Turn off padding as our data is block aligned */
+
+    /* Encrypt the master key */
+    if (! EVP_EncryptUpdate(&e_ctx, encrypted_master_key, &encrypted_len,
+                            decrypted_master_key, KEY_LEN_BYTES)) {
+        SLOGE("EVP_EncryptUpdate failed\n");
+        return -1;
+    }
+    if (! EVP_EncryptFinal_ex(&e_ctx, encrypted_master_key + encrypted_len, &final_len)) {
+        SLOGE("EVP_EncryptFinal failed\n");
+        return -1;
+    }
+
+    if (encrypted_len + final_len != KEY_LEN_BYTES) {
+        SLOGE("EVP_Encryption length check failed with %d, %d bytes\n", encrypted_len, final_len);
+        return -1;
+    }
+
+    /* Store the scrypt of the intermediate key, so we can validate if it's a
+       password error or mount error when things go wrong.
+       Note there's no need to check for errors, since if this is incorrect, we
+       simply won't wipe userdata, which is the correct default behavior
+    */
+    int N = 1 << crypt_ftr->N_factor;
+    int r = 1 << crypt_ftr->r_factor;
+    int p = 1 << crypt_ftr->p_factor;
+
+    rc = crypto_scrypt(ikey, KEY_LEN_BYTES,
+                       crypt_ftr->salt, sizeof(crypt_ftr->salt), N, r, p,
+                       crypt_ftr->scrypted_intermediate_key,
+                       sizeof(crypt_ftr->scrypted_intermediate_key));
+
+    if (rc) {
+      SLOGE("encrypt_master_key: crypto_scrypt failed");
+    }
+
+    EVP_CIPHER_CTX_cleanup(&e_ctx);
+
+    return 0;
+}
+
+static int decrypt_master_key_aux(const char *passwd, unsigned char *salt,
+                                  unsigned char *encrypted_master_key,
+                                  unsigned char *decrypted_master_key,
+                                  kdf_func kdf, void *kdf_params,
+                                  unsigned char** intermediate_key,
+                                  size_t* intermediate_key_size)
+{
+  unsigned char ikey[32+32] = { 0 }; /* Big enough to hold a 256 bit key and 256 bit IV */
+  EVP_CIPHER_CTX d_ctx;
+  int decrypted_len, final_len;
+
+  /* Turn the password into an intermediate key and IV that can decrypt the
+     master key */
+  if (kdf(passwd, salt, ikey, kdf_params)) {
+    SLOGE("kdf failed");
+    return -1;
+  }
+
+  /* Initialize the decryption engine */
+  EVP_CIPHER_CTX_init(&d_ctx);
+  if (! EVP_DecryptInit_ex(&d_ctx, EVP_aes_128_cbc(), NULL, ikey, ikey+KEY_LEN_BYTES)) {
+    return -1;
+  }
+  EVP_CIPHER_CTX_set_padding(&d_ctx, 0); /* Turn off padding as our data is block aligned */
+  /* Decrypt the master key */
+  if (! EVP_DecryptUpdate(&d_ctx, decrypted_master_key, &decrypted_len,
+                            encrypted_master_key, KEY_LEN_BYTES)) {
+    return -1;
+  }
+  if (! EVP_DecryptFinal_ex(&d_ctx, decrypted_master_key + decrypted_len, &final_len)) {
+    return -1;
+  }
+
+  if (decrypted_len + final_len != KEY_LEN_BYTES) {
+    return -1;
+  }
+
+  /* Copy intermediate key if needed by params */
+  if (intermediate_key && intermediate_key_size) {
+    *intermediate_key = (unsigned char*) malloc(KEY_LEN_BYTES);
+    if (*intermediate_key) {
+      memcpy(*intermediate_key, ikey, KEY_LEN_BYTES);
+      *intermediate_key_size = KEY_LEN_BYTES;
+    }
+  }
+
+  EVP_CIPHER_CTX_cleanup(&d_ctx);
+
+  return 0;
+}
+
+static void get_kdf_func(struct crypt_mnt_ftr *ftr, kdf_func *kdf, void** kdf_params)
+{
+    if (ftr->kdf_type == KDF_SCRYPT_KEYMASTER) {
+        *kdf = scrypt_keymaster;
+        *kdf_params = ftr;
+    } else if (ftr->kdf_type == KDF_SCRYPT) {
+        *kdf = scrypt;
+        *kdf_params = ftr;
+    } else {
+        *kdf = pbkdf2;
+        *kdf_params = NULL;
+    }
+}
+
+static int decrypt_master_key(const char *passwd, unsigned char *decrypted_master_key,
+                              struct crypt_mnt_ftr *crypt_ftr,
+                              unsigned char** intermediate_key,
+                              size_t* intermediate_key_size)
+{
+    kdf_func kdf;
+    void *kdf_params;
+    int ret;
+
+    get_kdf_func(crypt_ftr, &kdf, &kdf_params);
+    ret = decrypt_master_key_aux(passwd, crypt_ftr->salt, crypt_ftr->master_key,
+                                 decrypted_master_key, kdf, kdf_params,
+                                 intermediate_key, intermediate_key_size);
+    if (ret != 0) {
+        SLOGW("failure decrypting master key");
+    }
+
+    return ret;
+}
+
+static int create_encrypted_random_key(const char *passwd, unsigned char *master_key, unsigned char *salt,
+        struct crypt_mnt_ftr *crypt_ftr) {
+    int fd;
+    unsigned char key_buf[KEY_LEN_BYTES];
+
+    /* Get some random bits for a key */
+    fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC);
+    read(fd, key_buf, sizeof(key_buf));
+    read(fd, salt, SALT_LEN);
+    close(fd);
+
+    /* Now encrypt it with the password */
+    return encrypt_master_key(passwd, salt, key_buf, master_key, crypt_ftr);
+}
+
+int wait_and_unmount(const char *mountpoint, bool kill)
+{
+    int i, err, rc;
+#define WAIT_UNMOUNT_COUNT 20
+
+    /*  Now umount the tmpfs filesystem */
+    for (i=0; i<WAIT_UNMOUNT_COUNT; i++) {
+        if (umount(mountpoint) == 0) {
+            break;
+        }
+
+        if (errno == EINVAL) {
+            /* EINVAL is returned if the directory is not a mountpoint,
+             * i.e. there is no filesystem mounted there.  So just get out.
+             */
+            break;
+        }
+
+        err = errno;
+
+        /* If allowed, be increasingly aggressive before the last two retries */
+        if (kill) {
+            if (i == (WAIT_UNMOUNT_COUNT - 3)) {
+                SLOGW("sending SIGHUP to processes with open files\n");
+                vold_killProcessesWithOpenFiles(mountpoint, SIGTERM);
+            } else if (i == (WAIT_UNMOUNT_COUNT - 2)) {
+                SLOGW("sending SIGKILL to processes with open files\n");
+                vold_killProcessesWithOpenFiles(mountpoint, SIGKILL);
+            }
+        }
+
+        sleep(1);
+    }
+
+    if (i < WAIT_UNMOUNT_COUNT) {
+      SLOGD("unmounting %s succeeded\n", mountpoint);
+      rc = 0;
+    } else {
+      vold_killProcessesWithOpenFiles(mountpoint, 0);
+      SLOGE("unmounting %s failed: %s\n", mountpoint, strerror(err));
+      rc = -1;
+    }
+
+    return rc;
+}
+
+static int prep_data_fs(void)
+{
+    int i;
+
+    // NOTE: post_fs_data results in init calling back around to vold, so all
+    // callers to this method must be async
+
+    /* Do the prep of the /data filesystem */
+    property_set("vold.post_fs_data_done", "0");
+    property_set("vold.decrypt", "trigger_post_fs_data");
+    SLOGD("Just triggered post_fs_data\n");
+
+    /* Wait a max of 50 seconds, hopefully it takes much less */
+    if (!android::base::WaitForProperty("vold.post_fs_data_done",
+                                        "1",
+                                        std::chrono::seconds(50))) {
+        /* Ugh, we failed to prep /data in time.  Bail. */
+        SLOGE("post_fs_data timed out!\n");
+        return -1;
+    } else {
+        SLOGD("post_fs_data done\n");
+        return 0;
+    }
+}
+
+static void cryptfs_set_corrupt()
+{
+    // Mark the footer as bad
+    struct crypt_mnt_ftr crypt_ftr;
+    if (get_crypt_ftr_and_key(&crypt_ftr)) {
+        SLOGE("Failed to get crypto footer - panic");
+        return;
+    }
+
+    crypt_ftr.flags |= CRYPT_DATA_CORRUPT;
+    if (put_crypt_ftr_and_key(&crypt_ftr)) {
+        SLOGE("Failed to set crypto footer - panic");
+        return;
+    }
+}
+
+static void cryptfs_trigger_restart_min_framework()
+{
+    if (fs_mgr_do_tmpfs_mount(DATA_MNT_POINT)) {
+      SLOGE("Failed to mount tmpfs on data - panic");
+      return;
+    }
+
+    if (property_set("vold.decrypt", "trigger_post_fs_data")) {
+        SLOGE("Failed to trigger post fs data - panic");
+        return;
+    }
+
+    if (property_set("vold.decrypt", "trigger_restart_min_framework")) {
+        SLOGE("Failed to trigger restart min framework - panic");
+        return;
+    }
+}
+
+/* returns < 0 on failure */
+static int cryptfs_restart_internal(int restart_main)
+{
+    char crypto_blkdev[MAXPATHLEN];
+    int rc = -1;
+    static int restart_successful = 0;
+
+    /* Validate that it's OK to call this routine */
+    if (! master_key_saved) {
+        SLOGE("Encrypted filesystem not validated, aborting");
+        return -1;
+    }
+
+    if (restart_successful) {
+        SLOGE("System already restarted with encrypted disk, aborting");
+        return -1;
+    }
+
+    if (restart_main) {
+        /* Here is where we shut down the framework.  The init scripts
+         * start all services in one of three classes: core, main or late_start.
+         * On boot, we start core and main.  Now, we stop main, but not core,
+         * as core includes vold and a few other really important things that
+         * we need to keep running.  Once main has stopped, we should be able
+         * to umount the tmpfs /data, then mount the encrypted /data.
+         * We then restart the class main, and also the class late_start.
+         * At the moment, I've only put a few things in late_start that I know
+         * are not needed to bring up the framework, and that also cause problems
+         * with unmounting the tmpfs /data, but I hope to add add more services
+         * to the late_start class as we optimize this to decrease the delay
+         * till the user is asked for the password to the filesystem.
+         */
+
+        /* The init files are setup to stop the class main when vold.decrypt is
+         * set to trigger_reset_main.
+         */
+        property_set("vold.decrypt", "trigger_reset_main");
+        SLOGD("Just asked init to shut down class main\n");
+
+        /* Ugh, shutting down the framework is not synchronous, so until it
+         * can be fixed, this horrible hack will wait a moment for it all to
+         * shut down before proceeding.  Without it, some devices cannot
+         * restart the graphics services.
+         */
+        sleep(2);
+    }
+
+    /* Now that the framework is shutdown, we should be able to umount()
+     * the tmpfs filesystem, and mount the real one.
+     */
+
+    property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "");
+    if (strlen(crypto_blkdev) == 0) {
+        SLOGE("fs_crypto_blkdev not set\n");
+        return -1;
+    }
+
+    if (! (rc = wait_and_unmount(DATA_MNT_POINT, true)) ) {
+        /* If ro.crypto.readonly is set to 1, mount the decrypted
+         * filesystem readonly.  This is used when /data is mounted by
+         * recovery mode.
+         */
+        char ro_prop[PROPERTY_VALUE_MAX];
+        property_get("ro.crypto.readonly", ro_prop, "");
+        if (strlen(ro_prop) > 0 && atoi(ro_prop)) {
+            struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, DATA_MNT_POINT);
+            rec->flags |= MS_RDONLY;
+        }
+
+        /* If that succeeded, then mount the decrypted filesystem */
+        int retries = RETRY_MOUNT_ATTEMPTS;
+        int mount_rc;
+
+        /*
+         * fs_mgr_do_mount runs fsck. Use setexeccon to run trusted
+         * partitions in the fsck domain.
+         */
+        if (setexeccon(secontextFsck())){
+            SLOGE("Failed to setexeccon");
+            return -1;
+        }
+        while ((mount_rc = fs_mgr_do_mount(fstab, DATA_MNT_POINT,
+                                           crypto_blkdev, 0))
+               != 0) {
+            if (mount_rc == FS_MGR_DOMNT_BUSY) {
+                /* TODO: invoke something similar to
+                   Process::killProcessWithOpenFiles(DATA_MNT_POINT,
+                                   retries > RETRY_MOUNT_ATTEMPT/2 ? 1 : 2 ) */
+                SLOGI("Failed to mount %s because it is busy - waiting",
+                      crypto_blkdev);
+                if (--retries) {
+                    sleep(RETRY_MOUNT_DELAY_SECONDS);
+                } else {
+                    /* Let's hope that a reboot clears away whatever is keeping
+                       the mount busy */
+                    cryptfs_reboot(reboot);
+                }
+            } else {
+                SLOGE("Failed to mount decrypted data");
+                cryptfs_set_corrupt();
+                cryptfs_trigger_restart_min_framework();
+                SLOGI("Started framework to offer wipe");
+                if (setexeccon(NULL)) {
+                    SLOGE("Failed to setexeccon");
+                }
+                return -1;
+            }
+        }
+        if (setexeccon(NULL)) {
+            SLOGE("Failed to setexeccon");
+            return -1;
+        }
+
+        /* Create necessary paths on /data */
+        if (prep_data_fs()) {
+            return -1;
+        }
+        property_set("vold.decrypt", "trigger_load_persist_props");
+
+        /* startup service classes main and late_start */
+        property_set("vold.decrypt", "trigger_restart_framework");
+        SLOGD("Just triggered restart_framework\n");
+
+        /* Give it a few moments to get started */
+        sleep(1);
+    }
+
+    if (rc == 0) {
+        restart_successful = 1;
+    }
+
+    return rc;
+}
+
+int cryptfs_restart(void)
+{
+    SLOGI("cryptfs_restart");
+    if (e4crypt_is_native()) {
+        SLOGE("cryptfs_restart not valid for file encryption:");
+        return -1;
+    }
+
+    /* Call internal implementation forcing a restart of main service group */
+    return cryptfs_restart_internal(1);
+}
+
+static int do_crypto_complete(const char *mount_point)
+{
+  struct crypt_mnt_ftr crypt_ftr;
+  char encrypted_state[PROPERTY_VALUE_MAX];
+  char key_loc[PROPERTY_VALUE_MAX];
+
+  property_get("ro.crypto.state", encrypted_state, "");
+  if (strcmp(encrypted_state, "encrypted") ) {
+    SLOGE("not running with encryption, aborting");
+    return CRYPTO_COMPLETE_NOT_ENCRYPTED;
+  }
+
+  // crypto_complete is full disk encrypted status
+  if (e4crypt_is_native()) {
+    return CRYPTO_COMPLETE_NOT_ENCRYPTED;
+  }
+
+  if (get_crypt_ftr_and_key(&crypt_ftr)) {
+    fs_mgr_get_crypt_info(fstab, key_loc, 0, sizeof(key_loc));
+
+    /*
+     * Only report this error if key_loc is a file and it exists.
+     * If the device was never encrypted, and /data is not mountable for
+     * some reason, returning 1 should prevent the UI from presenting the
+     * a "enter password" screen, or worse, a "press button to wipe the
+     * device" screen.
+     */
+    if ((key_loc[0] == '/') && (access("key_loc", F_OK) == -1)) {
+      SLOGE("master key file does not exist, aborting");
+      return CRYPTO_COMPLETE_NOT_ENCRYPTED;
+    } else {
+      SLOGE("Error getting crypt footer and key\n");
+      return CRYPTO_COMPLETE_BAD_METADATA;
+    }
+  }
+
+  // Test for possible error flags
+  if (crypt_ftr.flags & CRYPT_ENCRYPTION_IN_PROGRESS){
+    SLOGE("Encryption process is partway completed\n");
+    return CRYPTO_COMPLETE_PARTIAL;
+  }
+
+  if (crypt_ftr.flags & CRYPT_INCONSISTENT_STATE){
+    SLOGE("Encryption process was interrupted but cannot continue\n");
+    return CRYPTO_COMPLETE_INCONSISTENT;
+  }
+
+  if (crypt_ftr.flags & CRYPT_DATA_CORRUPT){
+    SLOGE("Encryption is successful but data is corrupt\n");
+    return CRYPTO_COMPLETE_CORRUPT;
+  }
+
+  /* We passed the test! We shall diminish, and return to the west */
+  return CRYPTO_COMPLETE_ENCRYPTED;
+}
+
+static int test_mount_encrypted_fs(struct crypt_mnt_ftr* crypt_ftr,
+                                   const char *passwd, const char *mount_point, const char *label)
+{
+  /* Allocate enough space for a 256 bit key, but we may use less */
+  unsigned char decrypted_master_key[32];
+  char crypto_blkdev[MAXPATHLEN];
+  char real_blkdev[MAXPATHLEN];
+  char tmp_mount_point[64];
+  unsigned int orig_failed_decrypt_count;
+  int rc;
+  int use_keymaster = 0;
+  int upgrade = 0;
+  unsigned char* intermediate_key = 0;
+  size_t intermediate_key_size = 0;
+  int N = 1 << crypt_ftr->N_factor;
+  int r = 1 << crypt_ftr->r_factor;
+  int p = 1 << crypt_ftr->p_factor;
+
+  SLOGD("crypt_ftr->fs_size = %lld\n", crypt_ftr->fs_size);
+  orig_failed_decrypt_count = crypt_ftr->failed_decrypt_count;
+
+  if (! (crypt_ftr->flags & CRYPT_MNT_KEY_UNENCRYPTED) ) {
+    if (decrypt_master_key(passwd, decrypted_master_key, crypt_ftr,
+                           &intermediate_key, &intermediate_key_size)) {
+      SLOGE("Failed to decrypt master key\n");
+      rc = -1;
+      goto errout;
+    }
+  }
+
+  fs_mgr_get_crypt_info(fstab, 0, real_blkdev, sizeof(real_blkdev));
+
+  // Create crypto block device - all (non fatal) code paths
+  // need it
+  if (create_crypto_blk_dev(crypt_ftr, decrypted_master_key,
+                            real_blkdev, crypto_blkdev, label)) {
+     SLOGE("Error creating decrypted block device\n");
+     rc = -1;
+     goto errout;
+  }
+
+  /* Work out if the problem is the password or the data */
+  unsigned char scrypted_intermediate_key[sizeof(crypt_ftr->
+                                                 scrypted_intermediate_key)];
+
+  rc = crypto_scrypt(intermediate_key, intermediate_key_size,
+                     crypt_ftr->salt, sizeof(crypt_ftr->salt),
+                     N, r, p, scrypted_intermediate_key,
+                     sizeof(scrypted_intermediate_key));
+
+  // Does the key match the crypto footer?
+  if (rc == 0 && memcmp(scrypted_intermediate_key,
+                        crypt_ftr->scrypted_intermediate_key,
+                        sizeof(scrypted_intermediate_key)) == 0) {
+    SLOGI("Password matches");
+    rc = 0;
+  } else {
+    /* Try mounting the file system anyway, just in case the problem's with
+     * the footer, not the key. */
+    snprintf(tmp_mount_point, sizeof(tmp_mount_point), "%s/tmp_mnt",
+             mount_point);
+    mkdir(tmp_mount_point, 0755);
+    if (fs_mgr_do_mount(fstab, DATA_MNT_POINT, crypto_blkdev, tmp_mount_point)) {
+      SLOGE("Error temp mounting decrypted block device\n");
+      delete_crypto_blk_dev(label);
+
+      rc = ++crypt_ftr->failed_decrypt_count;
+      put_crypt_ftr_and_key(crypt_ftr);
+    } else {
+      /* Success! */
+      SLOGI("Password did not match but decrypted drive mounted - continue");
+      umount(tmp_mount_point);
+      rc = 0;
+    }
+  }
+
+  if (rc == 0) {
+    crypt_ftr->failed_decrypt_count = 0;
+    if (orig_failed_decrypt_count != 0) {
+      put_crypt_ftr_and_key(crypt_ftr);
+    }
+
+    /* Save the name of the crypto block device
+     * so we can mount it when restarting the framework. */
+    property_set("ro.crypto.fs_crypto_blkdev", crypto_blkdev);
+
+    /* Also save a the master key so we can reencrypted the key
+     * the key when we want to change the password on it. */
+    memcpy(saved_master_key, decrypted_master_key, KEY_LEN_BYTES);
+    saved_mount_point = strdup(mount_point);
+    master_key_saved = 1;
+    SLOGD("%s(): Master key saved\n", __FUNCTION__);
+    rc = 0;
+
+    // Upgrade if we're not using the latest KDF.
+    use_keymaster = keymaster_check_compatibility();
+    if (crypt_ftr->kdf_type == KDF_SCRYPT_KEYMASTER) {
+        // Don't allow downgrade
+    } else if (use_keymaster == 1 && crypt_ftr->kdf_type != KDF_SCRYPT_KEYMASTER) {
+        crypt_ftr->kdf_type = KDF_SCRYPT_KEYMASTER;
+        upgrade = 1;
+    } else if (use_keymaster == 0 && crypt_ftr->kdf_type != KDF_SCRYPT) {
+        crypt_ftr->kdf_type = KDF_SCRYPT;
+        upgrade = 1;
+    }
+
+    if (upgrade) {
+        rc = encrypt_master_key(passwd, crypt_ftr->salt, saved_master_key,
+                                crypt_ftr->master_key, crypt_ftr);
+        if (!rc) {
+            rc = put_crypt_ftr_and_key(crypt_ftr);
+        }
+        SLOGD("Key Derivation Function upgrade: rc=%d\n", rc);
+
+        // Do not fail even if upgrade failed - machine is bootable
+        // Note that if this code is ever hit, there is a *serious* problem
+        // since KDFs should never fail. You *must* fix the kdf before
+        // proceeding!
+        if (rc) {
+          SLOGW("Upgrade failed with error %d,"
+                " but continuing with previous state",
+                rc);
+          rc = 0;
+        }
+    }
+  }
+
+ errout:
+  if (intermediate_key) {
+    memset(intermediate_key, 0, intermediate_key_size);
+    free(intermediate_key);
+  }
+  return rc;
+}
+
+/*
+ * Called by vold when it's asked to mount an encrypted external
+ * storage volume. The incoming partition has no crypto header/footer,
+ * as any metadata is been stored in a separate, small partition.
+ *
+ * out_crypto_blkdev must be MAXPATHLEN.
+ */
+int cryptfs_setup_ext_volume(const char* label, const char* real_blkdev,
+        const unsigned char* key, int keysize, char* out_crypto_blkdev) {
+    int fd = open(real_blkdev, O_RDONLY|O_CLOEXEC);
+    if (fd == -1) {
+        SLOGE("Failed to open %s: %s", real_blkdev, strerror(errno));
+        return -1;
+    }
+
+    unsigned long nr_sec = 0;
+    get_blkdev_size(fd, &nr_sec);
+    close(fd);
+
+    if (nr_sec == 0) {
+        SLOGE("Failed to get size of %s: %s", real_blkdev, strerror(errno));
+        return -1;
+    }
+
+    struct crypt_mnt_ftr ext_crypt_ftr;
+    memset(&ext_crypt_ftr, 0, sizeof(ext_crypt_ftr));
+    ext_crypt_ftr.fs_size = nr_sec;
+    ext_crypt_ftr.keysize = keysize;
+    strcpy((char*) ext_crypt_ftr.crypto_type_name, "aes-cbc-essiv:sha256");
+
+    return create_crypto_blk_dev(&ext_crypt_ftr, key, real_blkdev,
+            out_crypto_blkdev, label);
+}
+
+/*
+ * Called by vold when it's asked to unmount an encrypted external
+ * storage volume.
+ */
+int cryptfs_revert_ext_volume(const char* label) {
+    return delete_crypto_blk_dev((char*) label);
+}
+
+int cryptfs_crypto_complete(void)
+{
+  return do_crypto_complete("/data");
+}
+
+int check_unmounted_and_get_ftr(struct crypt_mnt_ftr* crypt_ftr)
+{
+    char encrypted_state[PROPERTY_VALUE_MAX];
+    property_get("ro.crypto.state", encrypted_state, "");
+    if ( master_key_saved || strcmp(encrypted_state, "encrypted") ) {
+        SLOGE("encrypted fs already validated or not running with encryption,"
+              " aborting");
+        return -1;
+    }
+
+    if (get_crypt_ftr_and_key(crypt_ftr)) {
+        SLOGE("Error getting crypt footer and key");
+        return -1;
+    }
+
+    return 0;
+}
+
+int cryptfs_check_passwd(const char *passwd)
+{
+    SLOGI("cryptfs_check_passwd");
+    if (e4crypt_is_native()) {
+        SLOGE("cryptfs_check_passwd not valid for file encryption");
+        return -1;
+    }
+
+    struct crypt_mnt_ftr crypt_ftr;
+    int rc;
+
+    rc = check_unmounted_and_get_ftr(&crypt_ftr);
+    if (rc) {
+        SLOGE("Could not get footer");
+        return rc;
+    }
+
+    rc = test_mount_encrypted_fs(&crypt_ftr, passwd,
+                                 DATA_MNT_POINT, CRYPTO_BLOCK_DEVICE);
+    if (rc) {
+        SLOGE("Password did not match");
+        return rc;
+    }
+
+    if (crypt_ftr.flags & CRYPT_FORCE_COMPLETE) {
+        // Here we have a default actual password but a real password
+        // we must test against the scrypted value
+        // First, we must delete the crypto block device that
+        // test_mount_encrypted_fs leaves behind as a side effect
+        delete_crypto_blk_dev(CRYPTO_BLOCK_DEVICE);
+        rc = test_mount_encrypted_fs(&crypt_ftr, DEFAULT_PASSWORD,
+                                     DATA_MNT_POINT, CRYPTO_BLOCK_DEVICE);
+        if (rc) {
+            SLOGE("Default password did not match on reboot encryption");
+            return rc;
+        }
+
+        crypt_ftr.flags &= ~CRYPT_FORCE_COMPLETE;
+        put_crypt_ftr_and_key(&crypt_ftr);
+        rc = cryptfs_changepw(crypt_ftr.crypt_type, passwd);
+        if (rc) {
+            SLOGE("Could not change password on reboot encryption");
+            return rc;
+        }
+    }
+
+    if (crypt_ftr.crypt_type != CRYPT_TYPE_DEFAULT) {
+        cryptfs_clear_password();
+        password = strdup(passwd);
+        struct timespec now;
+        clock_gettime(CLOCK_BOOTTIME, &now);
+        password_expiry_time = now.tv_sec + password_max_age_seconds;
+    }
+
+    return rc;
+}
+
+int cryptfs_verify_passwd(char *passwd)
+{
+    struct crypt_mnt_ftr crypt_ftr;
+    /* Allocate enough space for a 256 bit key, but we may use less */
+    unsigned char decrypted_master_key[32];
+    char encrypted_state[PROPERTY_VALUE_MAX];
+    int rc;
+
+    property_get("ro.crypto.state", encrypted_state, "");
+    if (strcmp(encrypted_state, "encrypted") ) {
+        SLOGE("device not encrypted, aborting");
+        return -2;
+    }
+
+    if (!master_key_saved) {
+        SLOGE("encrypted fs not yet mounted, aborting");
+        return -1;
+    }
+
+    if (!saved_mount_point) {
+        SLOGE("encrypted fs failed to save mount point, aborting");
+        return -1;
+    }
+
+    if (get_crypt_ftr_and_key(&crypt_ftr)) {
+        SLOGE("Error getting crypt footer and key\n");
+        return -1;
+    }
+
+    if (crypt_ftr.flags & CRYPT_MNT_KEY_UNENCRYPTED) {
+        /* If the device has no password, then just say the password is valid */
+        rc = 0;
+    } else {
+        decrypt_master_key(passwd, decrypted_master_key, &crypt_ftr, 0, 0);
+        if (!memcmp(decrypted_master_key, saved_master_key, crypt_ftr.keysize)) {
+            /* They match, the password is correct */
+            rc = 0;
+        } else {
+            /* If incorrect, sleep for a bit to prevent dictionary attacks */
+            sleep(1);
+            rc = 1;
+        }
+    }
+
+    return rc;
+}
+
+/* Initialize a crypt_mnt_ftr structure.  The keysize is
+ * defaulted to 16 bytes, and the filesystem size to 0.
+ * Presumably, at a minimum, the caller will update the
+ * filesystem size and crypto_type_name after calling this function.
+ */
+static int cryptfs_init_crypt_mnt_ftr(struct crypt_mnt_ftr *ftr)
+{
+    off64_t off;
+
+    memset(ftr, 0, sizeof(struct crypt_mnt_ftr));
+    ftr->magic = CRYPT_MNT_MAGIC;
+    ftr->major_version = CURRENT_MAJOR_VERSION;
+    ftr->minor_version = CURRENT_MINOR_VERSION;
+    ftr->ftr_size = sizeof(struct crypt_mnt_ftr);
+    ftr->keysize = KEY_LEN_BYTES;
+
+    switch (keymaster_check_compatibility()) {
+    case 1:
+        ftr->kdf_type = KDF_SCRYPT_KEYMASTER;
+        break;
+
+    case 0:
+        ftr->kdf_type = KDF_SCRYPT;
+        break;
+
+    default:
+        SLOGE("keymaster_check_compatibility failed");
+        return -1;
+    }
+
+    get_device_scrypt_params(ftr);
+
+    ftr->persist_data_size = CRYPT_PERSIST_DATA_SIZE;
+    if (get_crypt_ftr_info(NULL, &off) == 0) {
+        ftr->persist_data_offset[0] = off + CRYPT_FOOTER_TO_PERSIST_OFFSET;
+        ftr->persist_data_offset[1] = off + CRYPT_FOOTER_TO_PERSIST_OFFSET +
+                                    ftr->persist_data_size;
+    }
+
+    return 0;
+}
+
+static int cryptfs_enable_wipe(char *crypto_blkdev, off64_t size, int type)
+{
+    const char *args[10];
+    char size_str[32]; /* Must be large enough to hold a %lld and null byte */
+    int num_args;
+    int status;
+    int tmp;
+    int rc = -1;
+
+    if (type == EXT4_FS) {
+#ifdef TARGET_USES_MKE2FS
+        args[0] = "/system/bin/mke2fs";
+        args[1] = "-M";
+        args[2] = "/data";
+        args[3] = "-b";
+        args[4] = "4096";
+        args[5] = "-t";
+        args[6] = "ext4";
+        args[7] = crypto_blkdev;
+        snprintf(size_str, sizeof(size_str), "%" PRId64, size / (4096 / 512));
+        args[8] = size_str;
+        num_args = 9;
+#else
+        args[0] = "/system/bin/make_ext4fs";
+        args[1] = "-a";
+        args[2] = "/data";
+        args[3] = "-l";
+        snprintf(size_str, sizeof(size_str), "%" PRId64, size * 512);
+        args[4] = size_str;
+        args[5] = crypto_blkdev;
+        num_args = 6;
+#endif
+        SLOGI("Making empty filesystem with command %s %s %s %s %s %s\n",
+              args[0], args[1], args[2], args[3], args[4], args[5]);
+    } else if (type == F2FS_FS) {
+        args[0] = "/system/bin/mkfs.f2fs";
+        args[1] = "-t";
+        args[2] = "-d1";
+        args[3] = crypto_blkdev;
+        snprintf(size_str, sizeof(size_str), "%" PRId64, size);
+        args[4] = size_str;
+        num_args = 5;
+        SLOGI("Making empty filesystem with command %s %s %s %s %s\n",
+              args[0], args[1], args[2], args[3], args[4]);
+    } else {
+        SLOGE("cryptfs_enable_wipe(): unknown filesystem type %d\n", type);
+        return -1;
+    }
+
+    tmp = android_fork_execvp(num_args, (char **)args, &status, false, true);
+
+    if (tmp != 0) {
+      SLOGE("Error creating empty filesystem on %s due to logwrap error\n", crypto_blkdev);
+    } else {
+        if (WIFEXITED(status)) {
+            if (WEXITSTATUS(status)) {
+                SLOGE("Error creating filesystem on %s, exit status %d ",
+                      crypto_blkdev, WEXITSTATUS(status));
+            } else {
+                SLOGD("Successfully created filesystem on %s\n", crypto_blkdev);
+                rc = 0;
+            }
+        } else {
+            SLOGE("Error creating filesystem on %s, did not exit normally\n", crypto_blkdev);
+       }
+    }
+
+    return rc;
+}
+
+#define CRYPT_INPLACE_BUFSIZE 4096
+#define CRYPT_SECTORS_PER_BUFSIZE (CRYPT_INPLACE_BUFSIZE / CRYPT_SECTOR_SIZE)
+#define CRYPT_SECTOR_SIZE 512
+
+/* aligned 32K writes tends to make flash happy.
+ * SD card association recommends it.
+ */
+#define BLOCKS_AT_A_TIME 8
+
+struct encryptGroupsData
+{
+    int realfd;
+    int cryptofd;
+    off64_t numblocks;
+    off64_t one_pct, cur_pct, new_pct;
+    off64_t blocks_already_done, tot_numblocks;
+    off64_t used_blocks_already_done, tot_used_blocks;
+    char* real_blkdev, * crypto_blkdev;
+    int count;
+    off64_t offset;
+    char* buffer;
+    off64_t last_written_sector;
+    int completed;
+    time_t time_started;
+    int remaining_time;
+};
+
+static void update_progress(struct encryptGroupsData* data, int is_used)
+{
+    data->blocks_already_done++;
+
+    if (is_used) {
+        data->used_blocks_already_done++;
+    }
+    if (data->tot_used_blocks) {
+        data->new_pct = data->used_blocks_already_done / data->one_pct;
+    } else {
+        data->new_pct = data->blocks_already_done / data->one_pct;
+    }
+
+    if (data->new_pct > data->cur_pct) {
+        char buf[8];
+        data->cur_pct = data->new_pct;
+        snprintf(buf, sizeof(buf), "%" PRId64, data->cur_pct);
+        property_set("vold.encrypt_progress", buf);
+    }
+
+    if (data->cur_pct >= 5) {
+        struct timespec time_now;
+        if (clock_gettime(CLOCK_MONOTONIC, &time_now)) {
+            SLOGW("Error getting time");
+        } else {
+            double elapsed_time = difftime(time_now.tv_sec, data->time_started);
+            off64_t remaining_blocks = data->tot_used_blocks
+                                       - data->used_blocks_already_done;
+            int remaining_time = (int)(elapsed_time * remaining_blocks
+                                       / data->used_blocks_already_done);
+
+            // Change time only if not yet set, lower, or a lot higher for
+            // best user experience
+            if (data->remaining_time == -1
+                || remaining_time < data->remaining_time
+                || remaining_time > data->remaining_time + 60) {
+                char buf[8];
+                snprintf(buf, sizeof(buf), "%d", remaining_time);
+                property_set("vold.encrypt_time_remaining", buf);
+                data->remaining_time = remaining_time;
+            }
+        }
+    }
+}
+
+static void log_progress(struct encryptGroupsData const* data, bool completed)
+{
+    // Precondition - if completed data = 0 else data != 0
+
+    // Track progress so we can skip logging blocks
+    static off64_t offset = -1;
+
+    // Need to close existing 'Encrypting from' log?
+    if (completed || (offset != -1 && data->offset != offset)) {
+        SLOGI("Encrypted to sector %" PRId64,
+              offset / info.block_size * CRYPT_SECTOR_SIZE);
+        offset = -1;
+    }
+
+    // Need to start new 'Encrypting from' log?
+    if (!completed && offset != data->offset) {
+        SLOGI("Encrypting from sector %" PRId64,
+              data->offset / info.block_size * CRYPT_SECTOR_SIZE);
+    }
+
+    // Update offset
+    if (!completed) {
+        offset = data->offset + (off64_t)data->count * info.block_size;
+    }
+}
+
+static int flush_outstanding_data(struct encryptGroupsData* data)
+{
+    if (data->count == 0) {
+        return 0;
+    }
+
+    SLOGV("Copying %d blocks at offset %" PRIx64, data->count, data->offset);
+
+    if (pread64(data->realfd, data->buffer,
+                info.block_size * data->count, data->offset)
+        <= 0) {
+        SLOGE("Error reading real_blkdev %s for inplace encrypt",
+              data->real_blkdev);
+        return -1;
+    }
+
+    if (pwrite64(data->cryptofd, data->buffer,
+                 info.block_size * data->count, data->offset)
+        <= 0) {
+        SLOGE("Error writing crypto_blkdev %s for inplace encrypt",
+              data->crypto_blkdev);
+        return -1;
+    } else {
+      log_progress(data, false);
+    }
+
+    data->count = 0;
+    data->last_written_sector = (data->offset + data->count)
+                                / info.block_size * CRYPT_SECTOR_SIZE - 1;
+    return 0;
+}
+
+static int encrypt_groups(struct encryptGroupsData* data)
+{
+    unsigned int i;
+    u8 *block_bitmap = 0;
+    unsigned int block;
+    off64_t ret;
+    int rc = -1;
+
+    data->buffer = (char *)malloc(info.block_size * BLOCKS_AT_A_TIME);
+    if (!data->buffer) {
+        SLOGE("Failed to allocate crypto buffer");
+        goto errout;
+    }
+
+    block_bitmap = (u8 *)malloc(info.block_size);
+    if (!block_bitmap) {
+        SLOGE("failed to allocate block bitmap");
+        goto errout;
+    }
+
+    for (i = 0; i < aux_info.groups; ++i) {
+        SLOGI("Encrypting group %d", i);
+
+        u32 first_block = aux_info.first_data_block + i * info.blocks_per_group;
+        u32 block_count = std::min(info.blocks_per_group,
+                                   (u32)(aux_info.len_blocks - first_block));
+
+        off64_t offset = (u64)info.block_size
+                         * aux_info.bg_desc[i].bg_block_bitmap;
+
+        ret = pread64(data->realfd, block_bitmap, info.block_size, offset);
+        if (ret != (int)info.block_size) {
+            SLOGE("failed to read all of block group bitmap %d", i);
+            goto errout;
+        }
+
+        offset = (u64)info.block_size * first_block;
+
+        data->count = 0;
+
+        for (block = 0; block < block_count; block++) {
+            int used = (aux_info.bg_desc[i].bg_flags & EXT4_BG_BLOCK_UNINIT) ?
+                    0 : bitmap_get_bit(block_bitmap, block);
+            update_progress(data, used);
+            if (used) {
+                if (data->count == 0) {
+                    data->offset = offset;
+                }
+                data->count++;
+            } else {
+                if (flush_outstanding_data(data)) {
+                    goto errout;
+                }
+            }
+
+            offset += info.block_size;
+
+            /* Write data if we are aligned or buffer size reached */
+            if (offset % (info.block_size * BLOCKS_AT_A_TIME) == 0
+                || data->count == BLOCKS_AT_A_TIME) {
+                if (flush_outstanding_data(data)) {
+                    goto errout;
+                }
+            }
+
+            if (!is_battery_ok_to_continue()) {
+                SLOGE("Stopping encryption due to low battery");
+                rc = 0;
+                goto errout;
+            }
+
+        }
+        if (flush_outstanding_data(data)) {
+            goto errout;
+        }
+    }
+
+    data->completed = 1;
+    rc = 0;
+
+errout:
+    log_progress(0, true);
+    free(data->buffer);
+    free(block_bitmap);
+    return rc;
+}
+
+static int cryptfs_enable_inplace_ext4(char *crypto_blkdev,
+                                       char *real_blkdev,
+                                       off64_t size,
+                                       off64_t *size_already_done,
+                                       off64_t tot_size,
+                                       off64_t previously_encrypted_upto)
+{
+    u32 i;
+    struct encryptGroupsData data;
+    int rc; // Can't initialize without causing warning -Wclobbered
+    struct timespec time_started = {0};
+    int retries = RETRY_MOUNT_ATTEMPTS;
+
+    if (previously_encrypted_upto > *size_already_done) {
+        SLOGD("Not fast encrypting since resuming part way through");
+        return -1;
+    }
+
+    memset(&data, 0, sizeof(data));
+    data.real_blkdev = real_blkdev;
+    data.crypto_blkdev = crypto_blkdev;
+
+    if ( (data.realfd = open(real_blkdev, O_RDWR|O_CLOEXEC)) < 0) {
+        SLOGE("Error opening real_blkdev %s for inplace encrypt. err=%d(%s)\n",
+              real_blkdev, errno, strerror(errno));
+        rc = -1;
+        goto errout;
+    }
+
+    // Wait until the block device appears.  Re-use the mount retry values since it is reasonable.
+    while ((data.cryptofd = open(crypto_blkdev, O_WRONLY|O_CLOEXEC)) < 0) {
+        if (--retries) {
+            SLOGE("Error opening crypto_blkdev %s for ext4 inplace encrypt. err=%d(%s), retrying\n",
+                  crypto_blkdev, errno, strerror(errno));
+            sleep(RETRY_MOUNT_DELAY_SECONDS);
+        } else {
+            SLOGE("Error opening crypto_blkdev %s for ext4 inplace encrypt. err=%d(%s)\n",
+                  crypto_blkdev, errno, strerror(errno));
+            rc = ENABLE_INPLACE_ERR_DEV;
+            goto errout;
+        }
+    }
+
+    if (setjmp(setjmp_env)) {
+        SLOGE("Reading ext4 extent caused an exception\n");
+        rc = -1;
+        goto errout;
+    }
+
+    if (read_ext(data.realfd, 0) != 0) {
+        SLOGE("Failed to read ext4 extent\n");
+        rc = -1;
+        goto errout;
+    }
+
+    data.numblocks = size / CRYPT_SECTORS_PER_BUFSIZE;
+    data.tot_numblocks = tot_size / CRYPT_SECTORS_PER_BUFSIZE;
+    data.blocks_already_done = *size_already_done / CRYPT_SECTORS_PER_BUFSIZE;
+
+    SLOGI("Encrypting ext4 filesystem in place...");
+
+    data.tot_used_blocks = data.numblocks;
+    for (i = 0; i < aux_info.groups; ++i) {
+      data.tot_used_blocks -= aux_info.bg_desc[i].bg_free_blocks_count;
+    }
+
+    data.one_pct = data.tot_used_blocks / 100;
+    data.cur_pct = 0;
+
+    if (clock_gettime(CLOCK_MONOTONIC, &time_started)) {
+        SLOGW("Error getting time at start");
+        // Note - continue anyway - we'll run with 0
+    }
+    data.time_started = time_started.tv_sec;
+    data.remaining_time = -1;
+
+    rc = encrypt_groups(&data);
+    if (rc) {
+        SLOGE("Error encrypting groups");
+        goto errout;
+    }
+
+    *size_already_done += data.completed ? size : data.last_written_sector;
+    rc = 0;
+
+errout:
+    close(data.realfd);
+    close(data.cryptofd);
+
+    return rc;
+}
+
+static void log_progress_f2fs(u64 block, bool completed)
+{
+    // Precondition - if completed data = 0 else data != 0
+
+    // Track progress so we can skip logging blocks
+    static u64 last_block = (u64)-1;
+
+    // Need to close existing 'Encrypting from' log?
+    if (completed || (last_block != (u64)-1 && block != last_block + 1)) {
+        SLOGI("Encrypted to block %" PRId64, last_block);
+        last_block = -1;
+    }
+
+    // Need to start new 'Encrypting from' log?
+    if (!completed && (last_block == (u64)-1 || block != last_block + 1)) {
+        SLOGI("Encrypting from block %" PRId64, block);
+    }
+
+    // Update offset
+    if (!completed) {
+        last_block = block;
+    }
+}
+
+static int encrypt_one_block_f2fs(u64 pos, void *data)
+{
+    struct encryptGroupsData *priv_dat = (struct encryptGroupsData *)data;
+
+    priv_dat->blocks_already_done = pos - 1;
+    update_progress(priv_dat, 1);
+
+    off64_t offset = pos * CRYPT_INPLACE_BUFSIZE;
+
+    if (pread64(priv_dat->realfd, priv_dat->buffer, CRYPT_INPLACE_BUFSIZE, offset) <= 0) {
+        SLOGE("Error reading real_blkdev %s for f2fs inplace encrypt", priv_dat->crypto_blkdev);
+        return -1;
+    }
+
+    if (pwrite64(priv_dat->cryptofd, priv_dat->buffer, CRYPT_INPLACE_BUFSIZE, offset) <= 0) {
+        SLOGE("Error writing crypto_blkdev %s for f2fs inplace encrypt", priv_dat->crypto_blkdev);
+        return -1;
+    } else {
+        log_progress_f2fs(pos, false);
+    }
+
+    return 0;
+}
+
+static int cryptfs_enable_inplace_f2fs(char *crypto_blkdev,
+                                       char *real_blkdev,
+                                       off64_t size,
+                                       off64_t *size_already_done,
+                                       off64_t tot_size,
+                                       off64_t previously_encrypted_upto)
+{
+    struct encryptGroupsData data;
+    struct f2fs_info *f2fs_info = NULL;
+    int rc = ENABLE_INPLACE_ERR_OTHER;
+    if (previously_encrypted_upto > *size_already_done) {
+        SLOGD("Not fast encrypting since resuming part way through");
+        return ENABLE_INPLACE_ERR_OTHER;
+    }
+    memset(&data, 0, sizeof(data));
+    data.real_blkdev = real_blkdev;
+    data.crypto_blkdev = crypto_blkdev;
+    data.realfd = -1;
+    data.cryptofd = -1;
+    if ( (data.realfd = open64(real_blkdev, O_RDWR|O_CLOEXEC)) < 0) {
+        SLOGE("Error opening real_blkdev %s for f2fs inplace encrypt\n",
+              real_blkdev);
+        goto errout;
+    }
+    if ( (data.cryptofd = open64(crypto_blkdev, O_WRONLY|O_CLOEXEC)) < 0) {
+        SLOGE("Error opening crypto_blkdev %s for f2fs inplace encrypt. err=%d(%s)\n",
+              crypto_blkdev, errno, strerror(errno));
+        rc = ENABLE_INPLACE_ERR_DEV;
+        goto errout;
+    }
+
+    f2fs_info = generate_f2fs_info(data.realfd);
+    if (!f2fs_info)
+      goto errout;
+
+    data.numblocks = size / CRYPT_SECTORS_PER_BUFSIZE;
+    data.tot_numblocks = tot_size / CRYPT_SECTORS_PER_BUFSIZE;
+    data.blocks_already_done = *size_already_done / CRYPT_SECTORS_PER_BUFSIZE;
+
+    data.tot_used_blocks = get_num_blocks_used(f2fs_info);
+
+    data.one_pct = data.tot_used_blocks / 100;
+    data.cur_pct = 0;
+    data.time_started = time(NULL);
+    data.remaining_time = -1;
+
+    data.buffer = (char *)malloc(f2fs_info->block_size);
+    if (!data.buffer) {
+        SLOGE("Failed to allocate crypto buffer");
+        goto errout;
+    }
+
+    data.count = 0;
+
+    /* Currently, this either runs to completion, or hits a nonrecoverable error */
+    rc = run_on_used_blocks(data.blocks_already_done, f2fs_info, &encrypt_one_block_f2fs, &data);
+
+    if (rc) {
+        SLOGE("Error in running over f2fs blocks");
+        rc = ENABLE_INPLACE_ERR_OTHER;
+        goto errout;
+    }
+
+    *size_already_done += size;
+    rc = 0;
+
+errout:
+    if (rc)
+        SLOGE("Failed to encrypt f2fs filesystem on %s", real_blkdev);
+
+    log_progress_f2fs(0, true);
+    free(f2fs_info);
+    free(data.buffer);
+    close(data.realfd);
+    close(data.cryptofd);
+
+    return rc;
+}
+
+static int cryptfs_enable_inplace_full(char *crypto_blkdev, char *real_blkdev,
+                                       off64_t size, off64_t *size_already_done,
+                                       off64_t tot_size,
+                                       off64_t previously_encrypted_upto)
+{
+    int realfd, cryptofd;
+    char *buf[CRYPT_INPLACE_BUFSIZE];
+    int rc = ENABLE_INPLACE_ERR_OTHER;
+    off64_t numblocks, i, remainder;
+    off64_t one_pct, cur_pct, new_pct;
+    off64_t blocks_already_done, tot_numblocks;
+
+    if ( (realfd = open(real_blkdev, O_RDONLY|O_CLOEXEC)) < 0) {
+        SLOGE("Error opening real_blkdev %s for inplace encrypt\n", real_blkdev);
+        return ENABLE_INPLACE_ERR_OTHER;
+    }
+
+    if ( (cryptofd = open(crypto_blkdev, O_WRONLY|O_CLOEXEC)) < 0) {
+        SLOGE("Error opening crypto_blkdev %s for inplace encrypt. err=%d(%s)\n",
+              crypto_blkdev, errno, strerror(errno));
+        close(realfd);
+        return ENABLE_INPLACE_ERR_DEV;
+    }
+
+    /* This is pretty much a simple loop of reading 4K, and writing 4K.
+     * The size passed in is the number of 512 byte sectors in the filesystem.
+     * So compute the number of whole 4K blocks we should read/write,
+     * and the remainder.
+     */
+    numblocks = size / CRYPT_SECTORS_PER_BUFSIZE;
+    remainder = size % CRYPT_SECTORS_PER_BUFSIZE;
+    tot_numblocks = tot_size / CRYPT_SECTORS_PER_BUFSIZE;
+    blocks_already_done = *size_already_done / CRYPT_SECTORS_PER_BUFSIZE;
+
+    SLOGE("Encrypting filesystem in place...");
+
+    i = previously_encrypted_upto + 1 - *size_already_done;
+
+    if (lseek64(realfd, i * CRYPT_SECTOR_SIZE, SEEK_SET) < 0) {
+        SLOGE("Cannot seek to previously encrypted point on %s", real_blkdev);
+        goto errout;
+    }
+
+    if (lseek64(cryptofd, i * CRYPT_SECTOR_SIZE, SEEK_SET) < 0) {
+        SLOGE("Cannot seek to previously encrypted point on %s", crypto_blkdev);
+        goto errout;
+    }
+
+    for (;i < size && i % CRYPT_SECTORS_PER_BUFSIZE != 0; ++i) {
+        if (unix_read(realfd, buf, CRYPT_SECTOR_SIZE) <= 0) {
+            SLOGE("Error reading initial sectors from real_blkdev %s for "
+                  "inplace encrypt\n", crypto_blkdev);
+            goto errout;
+        }
+        if (unix_write(cryptofd, buf, CRYPT_SECTOR_SIZE) <= 0) {
+            SLOGE("Error writing initial sectors to crypto_blkdev %s for "
+                  "inplace encrypt\n", crypto_blkdev);
+            goto errout;
+        } else {
+            SLOGI("Encrypted 1 block at %" PRId64, i);
+        }
+    }
+
+    one_pct = tot_numblocks / 100;
+    cur_pct = 0;
+    /* process the majority of the filesystem in blocks */
+    for (i/=CRYPT_SECTORS_PER_BUFSIZE; i<numblocks; i++) {
+        new_pct = (i + blocks_already_done) / one_pct;
+        if (new_pct > cur_pct) {
+            char buf[8];
+
+            cur_pct = new_pct;
+            snprintf(buf, sizeof(buf), "%" PRId64, cur_pct);
+            property_set("vold.encrypt_progress", buf);
+        }
+        if (unix_read(realfd, buf, CRYPT_INPLACE_BUFSIZE) <= 0) {
+            SLOGE("Error reading real_blkdev %s for inplace encrypt", crypto_blkdev);
+            goto errout;
+        }
+        if (unix_write(cryptofd, buf, CRYPT_INPLACE_BUFSIZE) <= 0) {
+            SLOGE("Error writing crypto_blkdev %s for inplace encrypt", crypto_blkdev);
+            goto errout;
+        } else {
+            SLOGD("Encrypted %d block at %" PRId64,
+                  CRYPT_SECTORS_PER_BUFSIZE,
+                  i * CRYPT_SECTORS_PER_BUFSIZE);
+        }
+
+       if (!is_battery_ok_to_continue()) {
+            SLOGE("Stopping encryption due to low battery");
+            *size_already_done += (i + 1) * CRYPT_SECTORS_PER_BUFSIZE - 1;
+            rc = 0;
+            goto errout;
+        }
+    }
+
+    /* Do any remaining sectors */
+    for (i=0; i<remainder; i++) {
+        if (unix_read(realfd, buf, CRYPT_SECTOR_SIZE) <= 0) {
+            SLOGE("Error reading final sectors from real_blkdev %s for inplace encrypt", crypto_blkdev);
+            goto errout;
+        }
+        if (unix_write(cryptofd, buf, CRYPT_SECTOR_SIZE) <= 0) {
+            SLOGE("Error writing final sectors to crypto_blkdev %s for inplace encrypt", crypto_blkdev);
+            goto errout;
+        } else {
+            SLOGI("Encrypted 1 block at next location");
+        }
+    }
+
+    *size_already_done += size;
+    rc = 0;
+
+errout:
+    close(realfd);
+    close(cryptofd);
+
+    return rc;
+}
+
+/* returns on of the ENABLE_INPLACE_* return codes */
+static int cryptfs_enable_inplace(char *crypto_blkdev, char *real_blkdev,
+                                  off64_t size, off64_t *size_already_done,
+                                  off64_t tot_size,
+                                  off64_t previously_encrypted_upto)
+{
+    int rc_ext4, rc_f2fs, rc_full;
+    if (previously_encrypted_upto) {
+        SLOGD("Continuing encryption from %" PRId64, previously_encrypted_upto);
+    }
+
+    if (*size_already_done + size < previously_encrypted_upto) {
+        *size_already_done += size;
+        return 0;
+    }
+
+    /* TODO: identify filesystem type.
+     * As is, cryptfs_enable_inplace_ext4 will fail on an f2fs partition, and
+     * then we will drop down to cryptfs_enable_inplace_f2fs.
+     * */
+    if ((rc_ext4 = cryptfs_enable_inplace_ext4(crypto_blkdev, real_blkdev,
+                                size, size_already_done,
+                                tot_size, previously_encrypted_upto)) == 0) {
+      return 0;
+    }
+    SLOGD("cryptfs_enable_inplace_ext4()=%d\n", rc_ext4);
+
+    if ((rc_f2fs = cryptfs_enable_inplace_f2fs(crypto_blkdev, real_blkdev,
+                                size, size_already_done,
+                                tot_size, previously_encrypted_upto)) == 0) {
+      return 0;
+    }
+    SLOGD("cryptfs_enable_inplace_f2fs()=%d\n", rc_f2fs);
+
+    rc_full = cryptfs_enable_inplace_full(crypto_blkdev, real_blkdev,
+                                       size, size_already_done, tot_size,
+                                       previously_encrypted_upto);
+    SLOGD("cryptfs_enable_inplace_full()=%d\n", rc_full);
+
+    /* Hack for b/17898962, the following is the symptom... */
+    if (rc_ext4 == ENABLE_INPLACE_ERR_DEV
+        && rc_f2fs == ENABLE_INPLACE_ERR_DEV
+        && rc_full == ENABLE_INPLACE_ERR_DEV) {
+            return ENABLE_INPLACE_ERR_DEV;
+    }
+    return rc_full;
+}
+
+#define CRYPTO_ENABLE_WIPE 1
+#define CRYPTO_ENABLE_INPLACE 2
+
+#define FRAMEWORK_BOOT_WAIT 60
+
+static int cryptfs_SHA256_fileblock(const char* filename, __le8* buf)
+{
+    int fd = open(filename, O_RDONLY|O_CLOEXEC);
+    if (fd == -1) {
+        SLOGE("Error opening file %s", filename);
+        return -1;
+    }
+
+    char block[CRYPT_INPLACE_BUFSIZE];
+    memset(block, 0, sizeof(block));
+    if (unix_read(fd, block, sizeof(block)) < 0) {
+        SLOGE("Error reading file %s", filename);
+        close(fd);
+        return -1;
+    }
+
+    close(fd);
+
+    SHA256_CTX c;
+    SHA256_Init(&c);
+    SHA256_Update(&c, block, sizeof(block));
+    SHA256_Final(buf, &c);
+
+    return 0;
+}
+
+static int get_fs_type(struct fstab_rec *rec)
+{
+    if (!strcmp(rec->fs_type, "ext4")) {
+        return EXT4_FS;
+    } else if (!strcmp(rec->fs_type, "f2fs")) {
+        return F2FS_FS;
+    } else {
+        return -1;
+    }
+}
+
+static int cryptfs_enable_all_volumes(struct crypt_mnt_ftr *crypt_ftr, int how,
+                                      char *crypto_blkdev, char *real_blkdev,
+                                      int previously_encrypted_upto)
+{
+    off64_t cur_encryption_done=0, tot_encryption_size=0;
+    int rc = -1;
+
+    if (!is_battery_ok_to_start()) {
+        SLOGW("Not starting encryption due to low battery");
+        return 0;
+    }
+
+    /* The size of the userdata partition, and add in the vold volumes below */
+    tot_encryption_size = crypt_ftr->fs_size;
+
+    if (how == CRYPTO_ENABLE_WIPE) {
+        struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, DATA_MNT_POINT);
+        int fs_type = get_fs_type(rec);
+        if (fs_type < 0) {
+            SLOGE("cryptfs_enable: unsupported fs type %s\n", rec->fs_type);
+            return -1;
+        }
+        rc = cryptfs_enable_wipe(crypto_blkdev, crypt_ftr->fs_size, fs_type);
+    } else if (how == CRYPTO_ENABLE_INPLACE) {
+        rc = cryptfs_enable_inplace(crypto_blkdev, real_blkdev,
+                                    crypt_ftr->fs_size, &cur_encryption_done,
+                                    tot_encryption_size,
+                                    previously_encrypted_upto);
+
+        if (rc == ENABLE_INPLACE_ERR_DEV) {
+            /* Hack for b/17898962 */
+            SLOGE("cryptfs_enable: crypto block dev failure. Must reboot...\n");
+            cryptfs_reboot(reboot);
+        }
+
+        if (!rc) {
+            crypt_ftr->encrypted_upto = cur_encryption_done;
+        }
+
+        if (!rc && crypt_ftr->encrypted_upto == crypt_ftr->fs_size) {
+            /* The inplace routine never actually sets the progress to 100% due
+             * to the round down nature of integer division, so set it here */
+            property_set("vold.encrypt_progress", "100");
+        }
+    } else {
+        /* Shouldn't happen */
+        SLOGE("cryptfs_enable: internal error, unknown option\n");
+        rc = -1;
+    }
+
+    return rc;
+}
+
+int cryptfs_enable_internal(char *howarg, int crypt_type, const char *passwd,
+                            int no_ui)
+{
+    int how = 0;
+    char crypto_blkdev[MAXPATHLEN], real_blkdev[MAXPATHLEN];
+    unsigned char decrypted_master_key[KEY_LEN_BYTES];
+    int rc=-1, i;
+    struct crypt_mnt_ftr crypt_ftr;
+    struct crypt_persist_data *pdata;
+    char encrypted_state[PROPERTY_VALUE_MAX];
+    char lockid[32] = { 0 };
+    char key_loc[PROPERTY_VALUE_MAX];
+    int num_vols;
+    off64_t previously_encrypted_upto = 0;
+    bool rebootEncryption = false;
+    bool onlyCreateHeader = false;
+    int fd = -1;
+
+    if (!strcmp(howarg, "wipe")) {
+      how = CRYPTO_ENABLE_WIPE;
+    } else if (! strcmp(howarg, "inplace")) {
+      how = CRYPTO_ENABLE_INPLACE;
+    } else {
+      /* Shouldn't happen, as CommandListener vets the args */
+      goto error_unencrypted;
+    }
+
+    if (how == CRYPTO_ENABLE_INPLACE
+          && get_crypt_ftr_and_key(&crypt_ftr) == 0) {
+        if (crypt_ftr.flags & CRYPT_ENCRYPTION_IN_PROGRESS) {
+            /* An encryption was underway and was interrupted */
+            previously_encrypted_upto = crypt_ftr.encrypted_upto;
+            crypt_ftr.encrypted_upto = 0;
+            crypt_ftr.flags &= ~CRYPT_ENCRYPTION_IN_PROGRESS;
+
+            /* At this point, we are in an inconsistent state. Until we successfully
+               complete encryption, a reboot will leave us broken. So mark the
+               encryption failed in case that happens.
+               On successfully completing encryption, remove this flag */
+            crypt_ftr.flags |= CRYPT_INCONSISTENT_STATE;
+
+            put_crypt_ftr_and_key(&crypt_ftr);
+        } else if (crypt_ftr.flags & CRYPT_FORCE_ENCRYPTION) {
+            if (!check_ftr_sha(&crypt_ftr)) {
+                memset(&crypt_ftr, 0, sizeof(crypt_ftr));
+                put_crypt_ftr_and_key(&crypt_ftr);
+                goto error_unencrypted;
+            }
+
+            /* Doing a reboot-encryption*/
+            crypt_ftr.flags &= ~CRYPT_FORCE_ENCRYPTION;
+            crypt_ftr.flags |= CRYPT_FORCE_COMPLETE;
+            rebootEncryption = true;
+        }
+    }
+
+    property_get("ro.crypto.state", encrypted_state, "");
+    if (!strcmp(encrypted_state, "encrypted") && !previously_encrypted_upto) {
+        SLOGE("Device is already running encrypted, aborting");
+        goto error_unencrypted;
+    }
+
+    // TODO refactor fs_mgr_get_crypt_info to get both in one call
+    fs_mgr_get_crypt_info(fstab, key_loc, 0, sizeof(key_loc));
+    fs_mgr_get_crypt_info(fstab, 0, real_blkdev, sizeof(real_blkdev));
+
+    /* Get the size of the real block device */
+    fd = open(real_blkdev, O_RDONLY|O_CLOEXEC);
+    if (fd == -1) {
+        SLOGE("Cannot open block device %s\n", real_blkdev);
+        goto error_unencrypted;
+    }
+    unsigned long nr_sec;
+    get_blkdev_size(fd, &nr_sec);
+    if (nr_sec == 0) {
+        SLOGE("Cannot get size of block device %s\n", real_blkdev);
+        goto error_unencrypted;
+    }
+    close(fd);
+
+    /* If doing inplace encryption, make sure the orig fs doesn't include the crypto footer */
+    if ((how == CRYPTO_ENABLE_INPLACE) && (!strcmp(key_loc, KEY_IN_FOOTER))) {
+        unsigned int fs_size_sec, max_fs_size_sec;
+        fs_size_sec = get_fs_size(real_blkdev);
+        if (fs_size_sec == 0)
+            fs_size_sec = get_f2fs_filesystem_size_sec(real_blkdev);
+
+        max_fs_size_sec = nr_sec - (CRYPT_FOOTER_OFFSET / CRYPT_SECTOR_SIZE);
+
+        if (fs_size_sec > max_fs_size_sec) {
+            SLOGE("Orig filesystem overlaps crypto footer region.  Cannot encrypt in place.");
+            goto error_unencrypted;
+        }
+    }
+
+    /* Get a wakelock as this may take a while, and we don't want the
+     * device to sleep on us.  We'll grab a partial wakelock, and if the UI
+     * wants to keep the screen on, it can grab a full wakelock.
+     */
+    snprintf(lockid, sizeof(lockid), "enablecrypto%d", (int) getpid());
+    acquire_wake_lock(PARTIAL_WAKE_LOCK, lockid);
+
+    /* The init files are setup to stop the class main and late start when
+     * vold sets trigger_shutdown_framework.
+     */
+    property_set("vold.decrypt", "trigger_shutdown_framework");
+    SLOGD("Just asked init to shut down class main\n");
+
+    /* Ask vold to unmount all devices that it manages */
+    if (vold_unmountAll()) {
+        SLOGE("Failed to unmount all vold managed devices");
+    }
+
+    /* no_ui means we are being called from init, not settings.
+       Now we always reboot from settings, so !no_ui means reboot
+     */
+    if (!no_ui) {
+        /* Try fallback, which is to reboot and try there */
+        onlyCreateHeader = true;
+        FILE* breadcrumb = fopen(BREADCRUMB_FILE, "we");
+        if (breadcrumb == 0) {
+            SLOGE("Failed to create breadcrumb file");
+            goto error_shutting_down;
+        }
+        fclose(breadcrumb);
+    }
+
+    /* Do extra work for a better UX when doing the long inplace encryption */
+    if (how == CRYPTO_ENABLE_INPLACE && !onlyCreateHeader) {
+        /* Now that /data is unmounted, we need to mount a tmpfs
+         * /data, set a property saying we're doing inplace encryption,
+         * and restart the framework.
+         */
+        if (fs_mgr_do_tmpfs_mount(DATA_MNT_POINT)) {
+            goto error_shutting_down;
+        }
+        /* Tells the framework that inplace encryption is starting */
+        property_set("vold.encrypt_progress", "0");
+
+        /* restart the framework. */
+        /* Create necessary paths on /data */
+        if (prep_data_fs()) {
+            goto error_shutting_down;
+        }
+
+        /* Ugh, shutting down the framework is not synchronous, so until it
+         * can be fixed, this horrible hack will wait a moment for it all to
+         * shut down before proceeding.  Without it, some devices cannot
+         * restart the graphics services.
+         */
+        sleep(2);
+    }
+
+    /* Start the actual work of making an encrypted filesystem */
+    /* Initialize a crypt_mnt_ftr for the partition */
+    if (previously_encrypted_upto == 0 && !rebootEncryption) {
+        if (cryptfs_init_crypt_mnt_ftr(&crypt_ftr)) {
+            goto error_shutting_down;
+        }
+
+        if (!strcmp(key_loc, KEY_IN_FOOTER)) {
+            crypt_ftr.fs_size = nr_sec
+              - (CRYPT_FOOTER_OFFSET / CRYPT_SECTOR_SIZE);
+        } else {
+            crypt_ftr.fs_size = nr_sec;
+        }
+        /* At this point, we are in an inconsistent state. Until we successfully
+           complete encryption, a reboot will leave us broken. So mark the
+           encryption failed in case that happens.
+           On successfully completing encryption, remove this flag */
+        if (onlyCreateHeader) {
+            crypt_ftr.flags |= CRYPT_FORCE_ENCRYPTION;
+        } else {
+            crypt_ftr.flags |= CRYPT_INCONSISTENT_STATE;
+        }
+        crypt_ftr.crypt_type = crypt_type;
+        strlcpy((char *)crypt_ftr.crypto_type_name, "aes-cbc-essiv:sha256", MAX_CRYPTO_TYPE_NAME_LEN);
+
+        /* Make an encrypted master key */
+        if (create_encrypted_random_key(onlyCreateHeader ? DEFAULT_PASSWORD : passwd,
+                                        crypt_ftr.master_key, crypt_ftr.salt, &crypt_ftr)) {
+            SLOGE("Cannot create encrypted master key\n");
+            goto error_shutting_down;
+        }
+
+        /* Replace scrypted intermediate key if we are preparing for a reboot */
+        if (onlyCreateHeader) {
+            unsigned char fake_master_key[KEY_LEN_BYTES];
+            unsigned char encrypted_fake_master_key[KEY_LEN_BYTES];
+            memset(fake_master_key, 0, sizeof(fake_master_key));
+            encrypt_master_key(passwd, crypt_ftr.salt, fake_master_key,
+                               encrypted_fake_master_key, &crypt_ftr);
+        }
+
+        /* Write the key to the end of the partition */
+        put_crypt_ftr_and_key(&crypt_ftr);
+
+        /* If any persistent data has been remembered, save it.
+         * If none, create a valid empty table and save that.
+         */
+        if (!persist_data) {
+            pdata = (crypt_persist_data *)malloc(CRYPT_PERSIST_DATA_SIZE);
+           if (pdata) {
+               init_empty_persist_data(pdata, CRYPT_PERSIST_DATA_SIZE);
+               persist_data = pdata;
+           }
+        }
+        if (persist_data) {
+            save_persistent_data();
+        }
+    }
+
+    if (onlyCreateHeader) {
+        sleep(2);
+        cryptfs_reboot(reboot);
+    }
+
+    if (how == CRYPTO_ENABLE_INPLACE && (!no_ui || rebootEncryption)) {
+        /* startup service classes main and late_start */
+        property_set("vold.decrypt", "trigger_restart_min_framework");
+        SLOGD("Just triggered restart_min_framework\n");
+
+        /* OK, the framework is restarted and will soon be showing a
+         * progress bar.  Time to setup an encrypted mapping, and
+         * either write a new filesystem, or encrypt in place updating
+         * the progress bar as we work.
+         */
+    }
+
+    decrypt_master_key(passwd, decrypted_master_key, &crypt_ftr, 0, 0);
+    create_crypto_blk_dev(&crypt_ftr, decrypted_master_key, real_blkdev, crypto_blkdev,
+                          CRYPTO_BLOCK_DEVICE);
+
+    /* If we are continuing, check checksums match */
+    rc = 0;
+    if (previously_encrypted_upto) {
+        __le8 hash_first_block[SHA256_DIGEST_LENGTH];
+        rc = cryptfs_SHA256_fileblock(crypto_blkdev, hash_first_block);
+
+        if (!rc && memcmp(hash_first_block, crypt_ftr.hash_first_block,
+                          sizeof(hash_first_block)) != 0) {
+            SLOGE("Checksums do not match - trigger wipe");
+            rc = -1;
+        }
+    }
+
+    if (!rc) {
+        rc = cryptfs_enable_all_volumes(&crypt_ftr, how,
+                                        crypto_blkdev, real_blkdev,
+                                        previously_encrypted_upto);
+    }
+
+    /* Calculate checksum if we are not finished */
+    if (!rc && how == CRYPTO_ENABLE_INPLACE
+            && crypt_ftr.encrypted_upto != crypt_ftr.fs_size) {
+        rc = cryptfs_SHA256_fileblock(crypto_blkdev,
+                                      crypt_ftr.hash_first_block);
+        if (rc) {
+            SLOGE("Error calculating checksum for continuing encryption");
+            rc = -1;
+        }
+    }
+
+    /* Undo the dm-crypt mapping whether we succeed or not */
+    delete_crypto_blk_dev(CRYPTO_BLOCK_DEVICE);
+
+    if (! rc) {
+        /* Success */
+        crypt_ftr.flags &= ~CRYPT_INCONSISTENT_STATE;
+
+        if (how == CRYPTO_ENABLE_INPLACE
+              && crypt_ftr.encrypted_upto != crypt_ftr.fs_size) {
+            SLOGD("Encrypted up to sector %lld - will continue after reboot",
+                  crypt_ftr.encrypted_upto);
+            crypt_ftr.flags |= CRYPT_ENCRYPTION_IN_PROGRESS;
+        }
+
+        put_crypt_ftr_and_key(&crypt_ftr);
+
+        if (how == CRYPTO_ENABLE_WIPE
+              || crypt_ftr.encrypted_upto == crypt_ftr.fs_size) {
+          char value[PROPERTY_VALUE_MAX];
+          property_get("ro.crypto.state", value, "");
+          if (!strcmp(value, "")) {
+            /* default encryption - continue first boot sequence */
+            property_set("ro.crypto.state", "encrypted");
+            property_set("ro.crypto.type", "block");
+            release_wake_lock(lockid);
+            if (rebootEncryption && crypt_ftr.crypt_type != CRYPT_TYPE_DEFAULT) {
+                // Bring up cryptkeeper that will check the password and set it
+                property_set("vold.decrypt", "trigger_shutdown_framework");
+                sleep(2);
+                property_set("vold.encrypt_progress", "");
+                cryptfs_trigger_restart_min_framework();
+            } else {
+                cryptfs_check_passwd(DEFAULT_PASSWORD);
+                cryptfs_restart_internal(1);
+            }
+            return 0;
+          } else {
+            sleep(2); /* Give the UI a chance to show 100% progress */
+            cryptfs_reboot(reboot);
+          }
+        } else {
+            sleep(2); /* Partially encrypted, ensure writes flushed to ssd */
+            cryptfs_reboot(shutdown);
+        }
+    } else {
+        char value[PROPERTY_VALUE_MAX];
+
+        property_get("ro.vold.wipe_on_crypt_fail", value, "0");
+        if (!strcmp(value, "1")) {
+            /* wipe data if encryption failed */
+            SLOGE("encryption failed - rebooting into recovery to wipe data\n");
+            std::string err;
+            const std::vector<std::string> options = {
+                "--wipe_data\n--reason=cryptfs_enable_internal\n"
+            };
+            if (!write_bootloader_message(options, &err)) {
+                SLOGE("could not write bootloader message: %s", err.c_str());
+            }
+            cryptfs_reboot(recovery);
+        } else {
+            /* set property to trigger dialog */
+            property_set("vold.encrypt_progress", "error_partially_encrypted");
+            release_wake_lock(lockid);
+        }
+        return -1;
+    }
+
+    /* hrm, the encrypt step claims success, but the reboot failed.
+     * This should not happen.
+     * Set the property and return.  Hope the framework can deal with it.
+     */
+    property_set("vold.encrypt_progress", "error_reboot_failed");
+    release_wake_lock(lockid);
+    return rc;
+
+error_unencrypted:
+    property_set("vold.encrypt_progress", "error_not_encrypted");
+    if (lockid[0]) {
+        release_wake_lock(lockid);
+    }
+    return -1;
+
+error_shutting_down:
+    /* we failed, and have not encrypted anthing, so the users's data is still intact,
+     * but the framework is stopped and not restarted to show the error, so it's up to
+     * vold to restart the system.
+     */
+    SLOGE("Error enabling encryption after framework is shutdown, no data changed, restarting system");
+    cryptfs_reboot(reboot);
+
+    /* shouldn't get here */
+    property_set("vold.encrypt_progress", "error_shutting_down");
+    if (lockid[0]) {
+        release_wake_lock(lockid);
+    }
+    return -1;
+}
+
+int cryptfs_enable(char *howarg, int type, char *passwd, int no_ui)
+{
+    return cryptfs_enable_internal(howarg, type, passwd, no_ui);
+}
+
+int cryptfs_enable_default(char *howarg, int no_ui)
+{
+    return cryptfs_enable_internal(howarg, CRYPT_TYPE_DEFAULT,
+                          DEFAULT_PASSWORD, no_ui);
+}
+
+int cryptfs_changepw(int crypt_type, const char *newpw)
+{
+    if (e4crypt_is_native()) {
+        SLOGE("cryptfs_changepw not valid for file encryption");
+        return -1;
+    }
+
+    struct crypt_mnt_ftr crypt_ftr;
+    int rc;
+
+    /* This is only allowed after we've successfully decrypted the master key */
+    if (!master_key_saved) {
+        SLOGE("Key not saved, aborting");
+        return -1;
+    }
+
+    if (crypt_type < 0 || crypt_type > CRYPT_TYPE_MAX_TYPE) {
+        SLOGE("Invalid crypt_type %d", crypt_type);
+        return -1;
+    }
+
+    /* get key */
+    if (get_crypt_ftr_and_key(&crypt_ftr)) {
+        SLOGE("Error getting crypt footer and key");
+        return -1;
+    }
+
+    crypt_ftr.crypt_type = crypt_type;
+
+    rc = encrypt_master_key(crypt_type == CRYPT_TYPE_DEFAULT ? DEFAULT_PASSWORD
+                                                        : newpw,
+                       crypt_ftr.salt,
+                       saved_master_key,
+                       crypt_ftr.master_key,
+                       &crypt_ftr);
+    if (rc) {
+        SLOGE("Encrypt master key failed: %d", rc);
+        return -1;
+    }
+    /* save the key */
+    put_crypt_ftr_and_key(&crypt_ftr);
+
+    return 0;
+}
+
+static unsigned int persist_get_max_entries(int encrypted) {
+    struct crypt_mnt_ftr crypt_ftr;
+    unsigned int dsize;
+    unsigned int max_persistent_entries;
+
+    /* If encrypted, use the values from the crypt_ftr, otherwise
+     * use the values for the current spec.
+     */
+    if (encrypted) {
+        if (get_crypt_ftr_and_key(&crypt_ftr)) {
+            return -1;
+        }
+        dsize = crypt_ftr.persist_data_size;
+    } else {
+        dsize = CRYPT_PERSIST_DATA_SIZE;
+    }
+
+    max_persistent_entries = (dsize - sizeof(struct crypt_persist_data)) /
+        sizeof(struct crypt_persist_entry);
+
+    return max_persistent_entries;
+}
+
+static int persist_get_key(const char *fieldname, char *value)
+{
+    unsigned int i;
+
+    if (persist_data == NULL) {
+        return -1;
+    }
+    for (i = 0; i < persist_data->persist_valid_entries; i++) {
+        if (!strncmp(persist_data->persist_entry[i].key, fieldname, PROPERTY_KEY_MAX)) {
+            /* We found it! */
+            strlcpy(value, persist_data->persist_entry[i].val, PROPERTY_VALUE_MAX);
+            return 0;
+        }
+    }
+
+    return -1;
+}
+
+static int persist_set_key(const char *fieldname, const char *value, int encrypted)
+{
+    unsigned int i;
+    unsigned int num;
+    unsigned int max_persistent_entries;
+
+    if (persist_data == NULL) {
+        return -1;
+    }
+
+    max_persistent_entries = persist_get_max_entries(encrypted);
+
+    num = persist_data->persist_valid_entries;
+
+    for (i = 0; i < num; i++) {
+        if (!strncmp(persist_data->persist_entry[i].key, fieldname, PROPERTY_KEY_MAX)) {
+            /* We found an existing entry, update it! */
+            memset(persist_data->persist_entry[i].val, 0, PROPERTY_VALUE_MAX);
+            strlcpy(persist_data->persist_entry[i].val, value, PROPERTY_VALUE_MAX);
+            return 0;
+        }
+    }
+
+    /* We didn't find it, add it to the end, if there is room */
+    if (persist_data->persist_valid_entries < max_persistent_entries) {
+        memset(&persist_data->persist_entry[num], 0, sizeof(struct crypt_persist_entry));
+        strlcpy(persist_data->persist_entry[num].key, fieldname, PROPERTY_KEY_MAX);
+        strlcpy(persist_data->persist_entry[num].val, value, PROPERTY_VALUE_MAX);
+        persist_data->persist_valid_entries++;
+        return 0;
+    }
+
+    return -1;
+}
+
+/**
+ * Test if key is part of the multi-entry (field, index) sequence. Return non-zero if key is in the
+ * sequence and its index is greater than or equal to index. Return 0 otherwise.
+ */
+static int match_multi_entry(const char *key, const char *field, unsigned index) {
+    unsigned int field_len;
+    unsigned int key_index;
+    field_len = strlen(field);
+
+    if (index == 0) {
+        // The first key in a multi-entry field is just the filedname itself.
+        if (!strcmp(key, field)) {
+            return 1;
+        }
+    }
+    // Match key against "%s_%d" % (field, index)
+    if (strlen(key) < field_len + 1 + 1) {
+        // Need at least a '_' and a digit.
+        return 0;
+    }
+    if (strncmp(key, field, field_len)) {
+        // If the key does not begin with field, it's not a match.
+        return 0;
+    }
+    if (1 != sscanf(&key[field_len],"_%d", &key_index)) {
+        return 0;
+    }
+    return key_index >= index;
+}
+
+/*
+ * Delete entry/entries from persist_data. If the entries are part of a multi-segment field, all
+ * remaining entries starting from index will be deleted.
+ * returns PERSIST_DEL_KEY_OK if deletion succeeds,
+ * PERSIST_DEL_KEY_ERROR_NO_FIELD if the field does not exist,
+ * and PERSIST_DEL_KEY_ERROR_OTHER if error occurs.
+ *
+ */
+static int persist_del_keys(const char *fieldname, unsigned index)
+{
+    unsigned int i;
+    unsigned int j;
+    unsigned int num;
+
+    if (persist_data == NULL) {
+        return PERSIST_DEL_KEY_ERROR_OTHER;
+    }
+
+    num = persist_data->persist_valid_entries;
+
+    j = 0; // points to the end of non-deleted entries.
+    // Filter out to-be-deleted entries in place.
+    for (i = 0; i < num; i++) {
+        if (!match_multi_entry(persist_data->persist_entry[i].key, fieldname, index)) {
+            persist_data->persist_entry[j] = persist_data->persist_entry[i];
+            j++;
+        }
+    }
+
+    if (j < num) {
+        persist_data->persist_valid_entries = j;
+        // Zeroise the remaining entries
+        memset(&persist_data->persist_entry[j], 0, (num - j) * sizeof(struct crypt_persist_entry));
+        return PERSIST_DEL_KEY_OK;
+    } else {
+        // Did not find an entry matching the given fieldname
+        return PERSIST_DEL_KEY_ERROR_NO_FIELD;
+    }
+}
+
+static int persist_count_keys(const char *fieldname)
+{
+    unsigned int i;
+    unsigned int count;
+
+    if (persist_data == NULL) {
+        return -1;
+    }
+
+    count = 0;
+    for (i = 0; i < persist_data->persist_valid_entries; i++) {
+        if (match_multi_entry(persist_data->persist_entry[i].key, fieldname, 0)) {
+            count++;
+        }
+    }
+
+    return count;
+}
+
+/* Return the value of the specified field. */
+int cryptfs_getfield(const char *fieldname, char *value, int len)
+{
+    if (e4crypt_is_native()) {
+        SLOGE("Cannot get field when file encrypted");
+        return -1;
+    }
+
+    char temp_value[PROPERTY_VALUE_MAX];
+    /* CRYPTO_GETFIELD_OK is success,
+     * CRYPTO_GETFIELD_ERROR_NO_FIELD is value not set,
+     * CRYPTO_GETFIELD_ERROR_BUF_TOO_SMALL is buffer (as given by len) too small,
+     * CRYPTO_GETFIELD_ERROR_OTHER is any other error
+     */
+    int rc = CRYPTO_GETFIELD_ERROR_OTHER;
+    int i;
+    char temp_field[PROPERTY_KEY_MAX];
+
+    if (persist_data == NULL) {
+        load_persistent_data();
+        if (persist_data == NULL) {
+            SLOGE("Getfield error, cannot load persistent data");
+            goto out;
+        }
+    }
+
+    // Read value from persistent entries. If the original value is split into multiple entries,
+    // stitch them back together.
+    if (!persist_get_key(fieldname, temp_value)) {
+        // We found it, copy it to the caller's buffer and keep going until all entries are read.
+        if (strlcpy(value, temp_value, len) >= (unsigned) len) {
+            // value too small
+            rc = CRYPTO_GETFIELD_ERROR_BUF_TOO_SMALL;
+            goto out;
+        }
+        rc = CRYPTO_GETFIELD_OK;
+
+        for (i = 1; /* break explicitly */; i++) {
+            if (snprintf(temp_field, sizeof(temp_field), "%s_%d", fieldname, i) >=
+                    (int) sizeof(temp_field)) {
+                // If the fieldname is very long, we stop as soon as it begins to overflow the
+                // maximum field length. At this point we have in fact fully read out the original
+                // value because cryptfs_setfield would not allow fields with longer names to be
+                // written in the first place.
+                break;
+            }
+            if (!persist_get_key(temp_field, temp_value)) {
+                  if (strlcat(value, temp_value, len) >= (unsigned)len) {
+                      // value too small.
+                      rc = CRYPTO_GETFIELD_ERROR_BUF_TOO_SMALL;
+                      goto out;
+                  }
+            } else {
+                // Exhaust all entries.
+                break;
+            }
+        }
+    } else {
+        /* Sadness, it's not there.  Return the error */
+        rc = CRYPTO_GETFIELD_ERROR_NO_FIELD;
+    }
+
+out:
+    return rc;
+}
+
+/* Set the value of the specified field. */
+int cryptfs_setfield(const char *fieldname, const char *value)
+{
+    if (e4crypt_is_native()) {
+        SLOGE("Cannot set field when file encrypted");
+        return -1;
+    }
+
+    char encrypted_state[PROPERTY_VALUE_MAX];
+    /* 0 is success, negative values are error */
+    int rc = CRYPTO_SETFIELD_ERROR_OTHER;
+    int encrypted = 0;
+    unsigned int field_id;
+    char temp_field[PROPERTY_KEY_MAX];
+    unsigned int num_entries;
+    unsigned int max_keylen;
+
+    if (persist_data == NULL) {
+        load_persistent_data();
+        if (persist_data == NULL) {
+            SLOGE("Setfield error, cannot load persistent data");
+            goto out;
+        }
+    }
+
+    property_get("ro.crypto.state", encrypted_state, "");
+    if (!strcmp(encrypted_state, "encrypted") ) {
+        encrypted = 1;
+    }
+
+    // Compute the number of entries required to store value, each entry can store up to
+    // (PROPERTY_VALUE_MAX - 1) chars
+    if (strlen(value) == 0) {
+        // Empty value also needs one entry to store.
+        num_entries = 1;
+    } else {
+        num_entries = (strlen(value) + (PROPERTY_VALUE_MAX - 1) - 1) / (PROPERTY_VALUE_MAX - 1);
+    }
+
+    max_keylen = strlen(fieldname);
+    if (num_entries > 1) {
+        // Need an extra "_%d" suffix.
+        max_keylen += 1 + log10(num_entries);
+    }
+    if (max_keylen > PROPERTY_KEY_MAX - 1) {
+        rc = CRYPTO_SETFIELD_ERROR_FIELD_TOO_LONG;
+        goto out;
+    }
+
+    // Make sure we have enough space to write the new value
+    if (persist_data->persist_valid_entries + num_entries - persist_count_keys(fieldname) >
+        persist_get_max_entries(encrypted)) {
+        rc = CRYPTO_SETFIELD_ERROR_VALUE_TOO_LONG;
+        goto out;
+    }
+
+    // Now that we know persist_data has enough space for value, let's delete the old field first
+    // to make up space.
+    persist_del_keys(fieldname, 0);
+
+    if (persist_set_key(fieldname, value, encrypted)) {
+        // fail to set key, should not happen as we have already checked the available space
+        SLOGE("persist_set_key() error during setfield()");
+        goto out;
+    }
+
+    for (field_id = 1; field_id < num_entries; field_id++) {
+        snprintf(temp_field, sizeof(temp_field), "%s_%d", fieldname, field_id);
+
+        if (persist_set_key(temp_field, value + field_id * (PROPERTY_VALUE_MAX - 1), encrypted)) {
+            // fail to set key, should not happen as we have already checked the available space.
+            SLOGE("persist_set_key() error during setfield()");
+            goto out;
+        }
+    }
+
+    /* If we are running encrypted, save the persistent data now */
+    if (encrypted) {
+        if (save_persistent_data()) {
+            SLOGE("Setfield error, cannot save persistent data");
+            goto out;
+        }
+    }
+
+    rc = CRYPTO_SETFIELD_OK;
+
+out:
+    return rc;
+}
+
+/* Checks userdata. Attempt to mount the volume if default-
+ * encrypted.
+ * On success trigger next init phase and return 0.
+ * Currently do not handle failure - see TODO below.
+ */
+int cryptfs_mount_default_encrypted(void)
+{
+    int crypt_type = cryptfs_get_password_type();
+    if (crypt_type < 0 || crypt_type > CRYPT_TYPE_MAX_TYPE) {
+        SLOGE("Bad crypt type - error");
+    } else if (crypt_type != CRYPT_TYPE_DEFAULT) {
+        SLOGD("Password is not default - "
+              "starting min framework to prompt");
+        property_set("vold.decrypt", "trigger_restart_min_framework");
+        return 0;
+    } else if (cryptfs_check_passwd(DEFAULT_PASSWORD) == 0) {
+        SLOGD("Password is default - restarting filesystem");
+        cryptfs_restart_internal(0);
+        return 0;
+    } else {
+        SLOGE("Encrypted, default crypt type but can't decrypt");
+    }
+
+    /** Corrupt. Allow us to boot into framework, which will detect bad
+        crypto when it calls do_crypto_complete, then do a factory reset
+     */
+    property_set("vold.decrypt", "trigger_restart_min_framework");
+    return 0;
+}
+
+/* Returns type of the password, default, pattern, pin or password.
+ */
+int cryptfs_get_password_type(void)
+{
+    if (e4crypt_is_native()) {
+        SLOGE("cryptfs_get_password_type not valid for file encryption");
+        return -1;
+    }
+
+    struct crypt_mnt_ftr crypt_ftr;
+
+    if (get_crypt_ftr_and_key(&crypt_ftr)) {
+        SLOGE("Error getting crypt footer and key\n");
+        return -1;
+    }
+
+    if (crypt_ftr.flags & CRYPT_INCONSISTENT_STATE) {
+        return -1;
+    }
+
+    return crypt_ftr.crypt_type;
+}
+
+const char* cryptfs_get_password()
+{
+    if (e4crypt_is_native()) {
+        SLOGE("cryptfs_get_password not valid for file encryption");
+        return 0;
+    }
+
+    struct timespec now;
+    clock_gettime(CLOCK_BOOTTIME, &now);
+    if (now.tv_sec < password_expiry_time) {
+        return password;
+    } else {
+        cryptfs_clear_password();
+        return 0;
+    }
+}
+
+void cryptfs_clear_password()
+{
+    if (password) {
+        size_t len = strlen(password);
+        memset(password, 0, len);
+        free(password);
+        password = 0;
+        password_expiry_time = 0;
+    }
+}
+
+int cryptfs_enable_file()
+{
+    return e4crypt_initialize_global_de();
+}
+
+int cryptfs_isConvertibleToFBE()
+{
+    struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, DATA_MNT_POINT);
+    return fs_mgr_is_convertible_to_fbe(rec) ? 1 : 0;
+}
+
+int cryptfs_create_default_ftr(struct crypt_mnt_ftr* crypt_ftr, __attribute__((unused))int key_length)
+{
+    if (cryptfs_init_crypt_mnt_ftr(crypt_ftr)) {
+        SLOGE("Failed to initialize crypt_ftr");
+        return -1;
+    }
+
+    if (create_encrypted_random_key(DEFAULT_PASSWORD, crypt_ftr->master_key,
+                                    crypt_ftr->salt, crypt_ftr)) {
+        SLOGE("Cannot create encrypted master key\n");
+        return -1;
+    }
+
+    //crypt_ftr->keysize = key_length / 8;
+    return 0;
+}
+
+int cryptfs_get_master_key(struct crypt_mnt_ftr* ftr, const char* password,
+                           unsigned char* master_key)
+{
+    int rc;
+
+    unsigned char* intermediate_key = 0;
+    size_t intermediate_key_size = 0;
+
+    if (password == 0 || *password == 0) {
+        password = DEFAULT_PASSWORD;
+    }
+
+    rc = decrypt_master_key(password, master_key, ftr, &intermediate_key,
+                            &intermediate_key_size);
+
+    if (rc) {
+        SLOGE("Can't calculate intermediate key");
+        return rc;
+    }
+
+    int N = 1 << ftr->N_factor;
+    int r = 1 << ftr->r_factor;
+    int p = 1 << ftr->p_factor;
+
+    unsigned char scrypted_intermediate_key[sizeof(ftr->scrypted_intermediate_key)];
+
+    rc = crypto_scrypt(intermediate_key, intermediate_key_size,
+                       ftr->salt, sizeof(ftr->salt), N, r, p,
+                       scrypted_intermediate_key,
+                       sizeof(scrypted_intermediate_key));
+
+    free(intermediate_key);
+
+    if (rc) {
+        SLOGE("Can't scrypt intermediate key");
+        return rc;
+    }
+
+    return memcmp(scrypted_intermediate_key, ftr->scrypted_intermediate_key,
+                  intermediate_key_size);
+}
+
+int cryptfs_set_password(struct crypt_mnt_ftr* ftr, const char* password,
+                         const unsigned char* master_key)
+{
+    return encrypt_master_key(password, ftr->salt, master_key, ftr->master_key,
+                              ftr);
+}
+
+void cryptfs_get_file_encryption_modes(const char **contents_mode_ret,
+                                       const char **filenames_mode_ret)
+{
+    struct fstab_rec* rec = fs_mgr_get_entry_for_mount_point(fstab, DATA_MNT_POINT);
+    fs_mgr_get_file_encryption_modes(rec, contents_mode_ret, filenames_mode_ret);
+}