diff --git a/keymaster/3.0/default/KeymasterDevice.cpp b/keymaster/3.0/default/KeymasterDevice.cpp
new file mode 100644
index 0000000..1208b8d
--- /dev/null
+++ b/keymaster/3.0/default/KeymasterDevice.cpp
@@ -0,0 +1,691 @@
+/*
+ **
+ ** Copyright 2016, 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.
+ */
+
+#define LOG_TAG "android.hardware.keymaster@3.0-impl"
+
+#include "KeymasterDevice.h"
+
+#include <cutils/log.h>
+
+#include <hardware/keymaster_defs.h>
+#include <keymaster/keymaster_configuration.h>
+#include <keymaster/soft_keymaster_device.h>
+
+namespace android {
+namespace hardware {
+namespace keymaster {
+namespace V3_0 {
+namespace implementation {
+
+using ::keymaster::SoftKeymasterDevice;
+
+class SoftwareOnlyHidlKeymasterEnforcement : public ::keymaster::KeymasterEnforcement {
+  public:
+    SoftwareOnlyHidlKeymasterEnforcement() : KeymasterEnforcement(64, 64) {}
+
+    uint32_t get_current_time() const override {
+        struct timespec tp;
+        int err = clock_gettime(CLOCK_MONOTONIC, &tp);
+        if (err || tp.tv_sec < 0) return 0;
+        return static_cast<uint32_t>(tp.tv_sec);
+    }
+
+    bool activation_date_valid(uint64_t) const override { return true; }
+    bool expiration_date_passed(uint64_t) const override { return false; }
+    bool auth_token_timed_out(const hw_auth_token_t&, uint32_t) const override { return false; }
+    bool ValidateTokenSignature(const hw_auth_token_t&) const override { return true; }
+};
+
+class SoftwareOnlyHidlKeymasterContext : public ::keymaster::SoftKeymasterContext {
+  public:
+    SoftwareOnlyHidlKeymasterContext() : enforcement_(new SoftwareOnlyHidlKeymasterEnforcement) {}
+
+    ::keymaster::KeymasterEnforcement* enforcement_policy() override { return enforcement_.get(); }
+
+  private:
+    std::unique_ptr<::keymaster::KeymasterEnforcement> enforcement_;
+};
+
+static int keymaster0_device_initialize(const hw_module_t* mod, keymaster2_device_t** dev) {
+    assert(mod->module_api_version < KEYMASTER_MODULE_API_VERSION_1_0);
+    ALOGI("Found keymaster0 module %s, version %x", mod->name, mod->module_api_version);
+
+    UniquePtr<SoftKeymasterDevice> soft_keymaster(new SoftKeymasterDevice);
+    keymaster0_device_t* km0_device = NULL;
+    keymaster_error_t error = KM_ERROR_OK;
+
+    int rc = keymaster0_open(mod, &km0_device);
+    if (rc) {
+        ALOGE("Error opening keystore keymaster0 device.");
+        goto err;
+    }
+
+    if (km0_device->flags & KEYMASTER_SOFTWARE_ONLY) {
+        ALOGI("Keymaster0 module is software-only.  Using SoftKeymasterDevice instead.");
+        km0_device->common.close(&km0_device->common);
+        km0_device = NULL;
+        // SoftKeymasterDevice will be deleted by keymaster_device_release()
+        *dev = soft_keymaster.release()->keymaster2_device();
+        return 0;
+    }
+
+    ALOGD("Wrapping keymaster0 module %s with SoftKeymasterDevice", mod->name);
+    error = soft_keymaster->SetHardwareDevice(km0_device);
+    km0_device = NULL;  // SoftKeymasterDevice has taken ownership.
+    if (error != KM_ERROR_OK) {
+        ALOGE("Got error %d from SetHardwareDevice", error);
+        rc = error;
+        goto err;
+    }
+
+    // SoftKeymasterDevice will be deleted by  keymaster_device_release()
+    *dev = soft_keymaster.release()->keymaster2_device();
+    return 0;
+
+err:
+    if (km0_device) km0_device->common.close(&km0_device->common);
+    *dev = NULL;
+    return rc;
+}
+
+static int keymaster1_device_initialize(const hw_module_t* mod, keymaster2_device_t** dev) {
+    assert(mod->module_api_version >= KEYMASTER_MODULE_API_VERSION_1_0);
+    ALOGI("Found keymaster1 module %s, version %x", mod->name, mod->module_api_version);
+
+    UniquePtr<SoftKeymasterDevice> soft_keymaster(new SoftKeymasterDevice);
+    keymaster1_device_t* km1_device = nullptr;
+    keymaster_error_t error = KM_ERROR_OK;
+
+    int rc = keymaster1_open(mod, &km1_device);
+    if (rc) {
+        ALOGE("Error %d opening keystore keymaster1 device", rc);
+        goto err;
+    }
+
+    ALOGD("Wrapping keymaster1 module %s with SofKeymasterDevice", mod->name);
+    error = soft_keymaster->SetHardwareDevice(km1_device);
+    km1_device = nullptr;  // SoftKeymasterDevice has taken ownership.
+    if (error != KM_ERROR_OK) {
+        ALOGE("Got error %d from SetHardwareDevice", error);
+        rc = error;
+        goto err;
+    }
+
+    // SoftKeymasterDevice will be deleted by keymaster_device_release()
+    *dev = soft_keymaster.release()->keymaster2_device();
+    return 0;
+
+err:
+    if (km1_device) km1_device->common.close(&km1_device->common);
+    *dev = NULL;
+    return rc;
+}
+
+static int keymaster2_device_initialize(const hw_module_t* mod, keymaster2_device_t** dev) {
+    assert(mod->module_api_version >= KEYMASTER_MODULE_API_VERSION_2_0);
+    ALOGI("Found keymaster2 module %s, version %x", mod->name, mod->module_api_version);
+
+    keymaster2_device_t* km2_device = nullptr;
+
+    int rc = keymaster2_open(mod, &km2_device);
+    if (rc) {
+        ALOGE("Error %d opening keystore keymaster2 device", rc);
+        goto err;
+    }
+
+    *dev = km2_device;
+    return 0;
+
+err:
+    if (km2_device) km2_device->common.close(&km2_device->common);
+    *dev = nullptr;
+    return rc;
+}
+
+static int keymaster_device_initialize(keymaster2_device_t** dev, uint32_t* version,
+                                       bool* supports_ec) {
+    const hw_module_t* mod;
+
+    *supports_ec = true;
+
+    int rc = hw_get_module_by_class(KEYSTORE_HARDWARE_MODULE_ID, NULL, &mod);
+    if (rc) {
+        ALOGI("Could not find any keystore module, using software-only implementation.");
+        // SoftKeymasterDevice will be deleted by keymaster_device_release()
+        *dev = (new SoftKeymasterDevice(new SoftwareOnlyHidlKeymasterContext))->keymaster2_device();
+        *version = -1;
+        return 0;
+    }
+
+    if (mod->module_api_version < KEYMASTER_MODULE_API_VERSION_1_0) {
+        *version = 0;
+        int rc = keymaster0_device_initialize(mod, dev);
+        if (rc == 0 && ((*dev)->flags & KEYMASTER_SUPPORTS_EC) == 0) {
+            *supports_ec = false;
+        }
+        return rc;
+    } else if (mod->module_api_version == KEYMASTER_MODULE_API_VERSION_1_0) {
+        *version = 1;
+        return keymaster1_device_initialize(mod, dev);
+    } else {
+        *version = 2;
+        return keymaster2_device_initialize(mod, dev);
+    }
+}
+
+KeymasterDevice::~KeymasterDevice() {
+    if (keymaster_device_) keymaster_device_->common.close(&keymaster_device_->common);
+}
+
+static inline keymaster_tag_type_t typeFromTag(const keymaster_tag_t tag) {
+    return keymaster_tag_get_type(tag);
+}
+
+/**
+ * legacy_enum_conversion converts enums from hidl to keymaster and back. Currently, this is just a
+ * cast to make the compiler happy. One of two thigs should happen though:
+ * TODO The keymaster enums should become aliases for the hidl generated enums so that we have a
+ *      single point of truth. Then this cast function can go away.
+ */
+inline static keymaster_tag_t legacy_enum_conversion(const Tag value) {
+    return keymaster_tag_t(value);
+}
+inline static Tag legacy_enum_conversion(const keymaster_tag_t value) {
+    return Tag(value);
+}
+inline static keymaster_purpose_t legacy_enum_conversion(const KeyPurpose value) {
+    return keymaster_purpose_t(value);
+}
+inline static keymaster_key_format_t legacy_enum_conversion(const KeyFormat value) {
+    return keymaster_key_format_t(value);
+}
+inline static ErrorCode legacy_enum_conversion(const keymaster_error_t value) {
+    return ErrorCode(value);
+}
+
+class KmParamSet : public keymaster_key_param_set_t {
+  public:
+    KmParamSet(const hidl_vec<KeyParameter>& keyParams) {
+        params = new keymaster_key_param_t[keyParams.size()];
+        length = keyParams.size();
+        for (size_t i = 0; i < keyParams.size(); ++i) {
+            auto tag = legacy_enum_conversion(keyParams[i].tag);
+            switch (typeFromTag(tag)) {
+            case KM_ENUM:
+            case KM_ENUM_REP:
+                params[i] = keymaster_param_enum(tag, keyParams[i].f.integer);
+                break;
+            case KM_UINT:
+            case KM_UINT_REP:
+                params[i] = keymaster_param_int(tag, keyParams[i].f.integer);
+                break;
+            case KM_ULONG:
+            case KM_ULONG_REP:
+                params[i] = keymaster_param_long(tag, keyParams[i].f.longInteger);
+                break;
+            case KM_DATE:
+                params[i] = keymaster_param_date(tag, keyParams[i].f.dateTime);
+                break;
+            case KM_BOOL:
+                if (keyParams[i].f.boolValue)
+                    params[i] = keymaster_param_bool(tag);
+                else
+                    params[i].tag = KM_TAG_INVALID;
+                break;
+            case KM_BIGNUM:
+            case KM_BYTES:
+                params[i] =
+                    keymaster_param_blob(tag, &keyParams[i].blob[0], keyParams[i].blob.size());
+                break;
+            case KM_INVALID:
+            default:
+                params[i].tag = KM_TAG_INVALID;
+                /* just skip */
+                break;
+            }
+        }
+    }
+    KmParamSet(KmParamSet&& other) : keymaster_key_param_set_t{other.params, other.length} {
+        other.length = 0;
+        other.params = nullptr;
+    }
+    KmParamSet(const KmParamSet&) = delete;
+    ~KmParamSet() { delete[] params; }
+};
+
+inline static KmParamSet hidlParams2KmParamSet(const hidl_vec<KeyParameter>& params) {
+    return KmParamSet(params);
+}
+
+inline static keymaster_blob_t hidlVec2KmBlob(const hidl_vec<uint8_t>& blob) {
+    /* hidl unmarshals funny pointers if the the blob is empty */
+    if (blob.size()) return {&blob[0], blob.size()};
+    return {nullptr, 0};
+}
+
+inline static keymaster_key_blob_t hidlVec2KmKeyBlob(const hidl_vec<uint8_t>& blob) {
+    /* hidl unmarshals funny pointers if the the blob is empty */
+    if (blob.size()) return {&blob[0], blob.size()};
+    return {nullptr, 0};
+}
+
+inline static hidl_vec<uint8_t> kmBlob2hidlVec(const keymaster_key_blob_t& blob) {
+    hidl_vec<uint8_t> result;
+    result.setToExternal(const_cast<unsigned char*>(blob.key_material), blob.key_material_size);
+    return result;
+}
+inline static hidl_vec<uint8_t> kmBlob2hidlVec(const keymaster_blob_t& blob) {
+    hidl_vec<uint8_t> result;
+    result.setToExternal(const_cast<unsigned char*>(blob.data), blob.data_length);
+    return result;
+}
+
+inline static hidl_vec<hidl_vec<uint8_t>>
+kmCertChain2Hidl(const keymaster_cert_chain_t* cert_chain) {
+    hidl_vec<hidl_vec<uint8_t>> result;
+    if (!cert_chain || cert_chain->entry_count == 0 || !cert_chain->entries) return result;
+
+    result.resize(cert_chain->entry_count);
+    for (size_t i = 0; i < cert_chain->entry_count; ++i) {
+        auto& entry = cert_chain->entries[i];
+        result[i] = kmBlob2hidlVec(entry);
+    }
+
+    return result;
+}
+
+static inline hidl_vec<KeyParameter> kmParamSet2Hidl(const keymaster_key_param_set_t& set) {
+    hidl_vec<KeyParameter> result;
+    if (set.length == 0 || set.params == nullptr) return result;
+
+    result.resize(set.length);
+    keymaster_key_param_t* params = set.params;
+    for (size_t i = 0; i < set.length; ++i) {
+        auto tag = params[i].tag;
+        result[i].tag = legacy_enum_conversion(tag);
+        switch (typeFromTag(tag)) {
+        case KM_ENUM:
+        case KM_ENUM_REP:
+            result[i].f.integer = params[i].enumerated;
+            break;
+        case KM_UINT:
+        case KM_UINT_REP:
+            result[i].f.integer = params[i].integer;
+            break;
+        case KM_ULONG:
+        case KM_ULONG_REP:
+            result[i].f.longInteger = params[i].long_integer;
+            break;
+        case KM_DATE:
+            result[i].f.dateTime = params[i].date_time;
+            break;
+        case KM_BOOL:
+            result[i].f.boolValue = params[i].boolean;
+            break;
+        case KM_BIGNUM:
+        case KM_BYTES:
+            result[i].blob.setToExternal(const_cast<unsigned char*>(params[i].blob.data),
+                                         params[i].blob.data_length);
+            break;
+        case KM_INVALID:
+        default:
+            params[i].tag = KM_TAG_INVALID;
+            /* just skip */
+            break;
+        }
+    }
+    return result;
+}
+
+// Methods from ::android::hardware::keymaster::V3_0::IKeymasterDevice follow.
+Return<void> KeymasterDevice::getHardwareFeatures(getHardwareFeatures_cb _hidl_cb) {
+    bool is_secure = false;
+    bool supports_symmetric_cryptography = false;
+    bool supports_attestation = false;
+
+    switch (hardware_version_) {
+    case 2:
+        supports_attestation = true;
+    /* Falls through */
+    case 1:
+        supports_symmetric_cryptography = true;
+    /* Falls through */
+    case 0:
+        is_secure = true;
+        break;
+    };
+
+    _hidl_cb(is_secure, hardware_supports_ec_, supports_symmetric_cryptography,
+             supports_attestation);
+    return Void();
+}
+
+Return<ErrorCode> KeymasterDevice::addRngEntropy(const hidl_vec<uint8_t>& data) {
+    return legacy_enum_conversion(
+        keymaster_device_->add_rng_entropy(keymaster_device_, &data[0], data.size()));
+}
+
+Return<void> KeymasterDevice::generateKey(const hidl_vec<KeyParameter>& keyParams,
+                                          generateKey_cb _hidl_cb) {
+    // result variables for the wire
+    KeyCharacteristics resultCharacteristics;
+    hidl_vec<uint8_t> resultKeyBlob;
+
+    // result variables the backend understands
+    keymaster_key_blob_t key_blob{nullptr, 0};
+    keymaster_key_characteristics_t key_characteristics{{nullptr, 0}, {nullptr, 0}};
+
+    // convert the parameter set to something our backend understands
+    auto kmParams = hidlParams2KmParamSet(keyParams);
+
+    auto rc = keymaster_device_->generate_key(keymaster_device_, &kmParams, &key_blob,
+                                              &key_characteristics);
+
+    if (rc == KM_ERROR_OK) {
+        // on success convert the result to wire format
+        resultKeyBlob = kmBlob2hidlVec(key_blob);
+        resultCharacteristics.softwareEnforced = kmParamSet2Hidl(key_characteristics.sw_enforced);
+        resultCharacteristics.teeEnforced = kmParamSet2Hidl(key_characteristics.hw_enforced);
+    }
+
+    // send results off to the client
+    _hidl_cb(legacy_enum_conversion(rc), resultKeyBlob, resultCharacteristics);
+
+    // free buffers that we are responsible for
+    if (key_blob.key_material) free(const_cast<uint8_t*>(key_blob.key_material));
+    keymaster_free_characteristics(&key_characteristics);
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::getKeyCharacteristics(const hidl_vec<uint8_t>& keyBlob,
+                                                    const hidl_vec<uint8_t>& clientId,
+                                                    const hidl_vec<uint8_t>& appData,
+                                                    getKeyCharacteristics_cb _hidl_cb) {
+    // result variables for the wire
+    KeyCharacteristics resultCharacteristics;
+
+    // result variables the backend understands
+    keymaster_key_characteristics_t key_characteristics{{nullptr, 0}, {nullptr, 0}};
+
+    auto kmKeyBlob = hidlVec2KmKeyBlob(keyBlob);
+    auto kmClientId = hidlVec2KmBlob(clientId);
+    auto kmAppData = hidlVec2KmBlob(appData);
+
+    auto rc = keymaster_device_->get_key_characteristics(
+        keymaster_device_, keyBlob.size() ? &kmKeyBlob : nullptr,
+        clientId.size() ? &kmClientId : nullptr, appData.size() ? &kmAppData : nullptr,
+        &key_characteristics);
+
+    if (rc == KM_ERROR_OK) {
+        resultCharacteristics.softwareEnforced = kmParamSet2Hidl(key_characteristics.sw_enforced);
+        resultCharacteristics.teeEnforced = kmParamSet2Hidl(key_characteristics.hw_enforced);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultCharacteristics);
+
+    keymaster_free_characteristics(&key_characteristics);
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::importKey(const hidl_vec<KeyParameter>& params, KeyFormat keyFormat,
+                                        const hidl_vec<uint8_t>& keyData, importKey_cb _hidl_cb) {
+    // result variables for the wire
+    KeyCharacteristics resultCharacteristics;
+    hidl_vec<uint8_t> resultKeyBlob;
+
+    // result variables the backend understands
+    keymaster_key_blob_t key_blob{nullptr, 0};
+    keymaster_key_characteristics_t key_characteristics{{nullptr, 0}, {nullptr, 0}};
+
+    auto kmParams = hidlParams2KmParamSet(params);
+    auto kmKeyData = hidlVec2KmBlob(keyData);
+
+    auto rc = keymaster_device_->import_key(keymaster_device_, &kmParams,
+                                            legacy_enum_conversion(keyFormat), &kmKeyData,
+                                            &key_blob, &key_characteristics);
+
+    if (rc == KM_ERROR_OK) {
+        // on success convert the result to wire format
+        // (Can we assume that key_blob is {nullptr, 0} or a valid buffer description?)
+        resultKeyBlob = kmBlob2hidlVec(key_blob);
+        resultCharacteristics.softwareEnforced = kmParamSet2Hidl(key_characteristics.sw_enforced);
+        resultCharacteristics.teeEnforced = kmParamSet2Hidl(key_characteristics.hw_enforced);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultKeyBlob, resultCharacteristics);
+
+    // free buffers that we are responsible for
+    if (key_blob.key_material) free(const_cast<uint8_t*>(key_blob.key_material));
+    keymaster_free_characteristics(&key_characteristics);
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::exportKey(KeyFormat exportFormat, const hidl_vec<uint8_t>& keyBlob,
+                                        const hidl_vec<uint8_t>& clientId,
+                                        const hidl_vec<uint8_t>& appData, exportKey_cb _hidl_cb) {
+
+    // result variables for the wire
+    hidl_vec<uint8_t> resultKeyBlob;
+
+    // result variables the backend understands
+    keymaster_blob_t out_blob{nullptr, 0};
+
+    auto kmKeyBlob = hidlVec2KmKeyBlob(keyBlob);
+    auto kmClientId = hidlVec2KmBlob(clientId);
+    auto kmAppData = hidlVec2KmBlob(appData);
+
+    auto rc = keymaster_device_->export_key(keymaster_device_, legacy_enum_conversion(exportFormat),
+                                            keyBlob.size() ? &kmKeyBlob : nullptr,
+                                            clientId.size() ? &kmClientId : nullptr,
+                                            appData.size() ? &kmAppData : nullptr, &out_blob);
+
+    if (rc == KM_ERROR_OK) {
+        // on success convert the result to wire format
+        // (Can we assume that key_blob is {nullptr, 0} or a valid buffer description?)
+        resultKeyBlob = kmBlob2hidlVec(out_blob);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultKeyBlob);
+
+    // free buffers that we are responsible for
+    if (out_blob.data) free(const_cast<uint8_t*>(out_blob.data));
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::attestKey(const hidl_vec<uint8_t>& keyToAttest,
+                                        const hidl_vec<KeyParameter>& attestParams,
+                                        attestKey_cb _hidl_cb) {
+
+    hidl_vec<hidl_vec<uint8_t>> resultCertChain;
+
+    keymaster_cert_chain_t cert_chain{nullptr, 0};
+
+    auto kmKeyToAttest = hidlVec2KmKeyBlob(keyToAttest);
+    auto kmAttestParams = hidlParams2KmParamSet(attestParams);
+
+    auto rc = keymaster_device_->attest_key(keymaster_device_, &kmKeyToAttest, &kmAttestParams,
+                                            &cert_chain);
+
+    if (rc == KM_ERROR_OK) {
+        resultCertChain = kmCertChain2Hidl(&cert_chain);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultCertChain);
+
+    keymaster_free_cert_chain(&cert_chain);
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::upgradeKey(const hidl_vec<uint8_t>& keyBlobToUpgrade,
+                                         const hidl_vec<KeyParameter>& upgradeParams,
+                                         upgradeKey_cb _hidl_cb) {
+
+    // result variables for the wire
+    hidl_vec<uint8_t> resultKeyBlob;
+
+    // result variables the backend understands
+    keymaster_key_blob_t key_blob{nullptr, 0};
+
+    auto kmKeyBlobToUpgrade = hidlVec2KmKeyBlob(keyBlobToUpgrade);
+    auto kmUpgradeParams = hidlParams2KmParamSet(upgradeParams);
+
+    auto rc = keymaster_device_->upgrade_key(keymaster_device_, &kmKeyBlobToUpgrade,
+                                             &kmUpgradeParams, &key_blob);
+
+    if (rc == KM_ERROR_OK) {
+        // on success convert the result to wire format
+        resultKeyBlob = kmBlob2hidlVec(key_blob);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultKeyBlob);
+
+    if (key_blob.key_material) free(const_cast<uint8_t*>(key_blob.key_material));
+
+    return Void();
+}
+
+Return<ErrorCode> KeymasterDevice::deleteKey(const hidl_vec<uint8_t>& keyBlob) {
+    auto kmKeyBlob = hidlVec2KmKeyBlob(keyBlob);
+    return legacy_enum_conversion(keymaster_device_->delete_key(keymaster_device_, &kmKeyBlob));
+}
+
+Return<ErrorCode> KeymasterDevice::deleteAllKeys() {
+    return legacy_enum_conversion(keymaster_device_->delete_all_keys(keymaster_device_));
+}
+
+Return<void> KeymasterDevice::begin(KeyPurpose purpose, const hidl_vec<uint8_t>& key,
+                                    const hidl_vec<KeyParameter>& inParams, begin_cb _hidl_cb) {
+
+    // result variables for the wire
+    hidl_vec<KeyParameter> resultParams;
+    uint64_t resultOpHandle = 0;
+
+    // result variables the backend understands
+    keymaster_key_param_set_t out_params{nullptr, 0};
+    keymaster_operation_handle_t& operation_handle = resultOpHandle;
+
+    auto kmKey = hidlVec2KmKeyBlob(key);
+    auto kmInParams = hidlParams2KmParamSet(inParams);
+
+    auto rc = keymaster_device_->begin(keymaster_device_, legacy_enum_conversion(purpose), &kmKey,
+                                       &kmInParams, &out_params, &operation_handle);
+
+    if (rc == KM_ERROR_OK) resultParams = kmParamSet2Hidl(out_params);
+
+    _hidl_cb(legacy_enum_conversion(rc), resultParams, resultOpHandle);
+
+    keymaster_free_param_set(&out_params);
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::update(uint64_t operationHandle,
+                                     const hidl_vec<KeyParameter>& inParams,
+                                     const hidl_vec<uint8_t>& input, update_cb _hidl_cb) {
+    // result variables for the wire
+    uint32_t resultConsumed = 0;
+    hidl_vec<KeyParameter> resultParams;
+    hidl_vec<uint8_t> resultBlob;
+
+    // result variables the backend understands
+    size_t consumed = 0;
+    keymaster_key_param_set_t out_params{nullptr, 0};
+    keymaster_blob_t out_blob{nullptr, 0};
+
+    auto kmInParams = hidlParams2KmParamSet(inParams);
+    auto kmInput = hidlVec2KmBlob(input);
+
+    auto rc = keymaster_device_->update(keymaster_device_, operationHandle, &kmInParams, &kmInput,
+                                        &consumed, &out_params, &out_blob);
+
+    if (rc == KM_ERROR_OK) {
+        resultConsumed = consumed;
+        resultParams = kmParamSet2Hidl(out_params);
+        resultBlob = kmBlob2hidlVec(out_blob);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultConsumed, resultParams, resultBlob);
+
+    keymaster_free_param_set(&out_params);
+    if (out_blob.data) free(const_cast<uint8_t*>(out_blob.data));
+
+    return Void();
+}
+
+Return<void> KeymasterDevice::finish(uint64_t operationHandle,
+                                     const hidl_vec<KeyParameter>& inParams,
+                                     const hidl_vec<uint8_t>& input,
+                                     const hidl_vec<uint8_t>& signature, finish_cb _hidl_cb) {
+    // result variables for the wire
+    hidl_vec<KeyParameter> resultParams;
+    hidl_vec<uint8_t> resultBlob;
+
+    // result variables the backend understands
+    keymaster_key_param_set_t out_params{nullptr, 0};
+    keymaster_blob_t out_blob{nullptr, 0};
+
+    auto kmInParams = hidlParams2KmParamSet(inParams);
+    auto kmInput = hidlVec2KmBlob(input);
+    auto kmSignature = hidlVec2KmBlob(signature);
+
+    auto rc = keymaster_device_->finish(keymaster_device_, operationHandle, &kmInParams, &kmInput,
+                                        &kmSignature, &out_params, &out_blob);
+
+    if (rc == KM_ERROR_OK) {
+        resultParams = kmParamSet2Hidl(out_params);
+        resultBlob = kmBlob2hidlVec(out_blob);
+    }
+
+    _hidl_cb(legacy_enum_conversion(rc), resultParams, resultBlob);
+
+    keymaster_free_param_set(&out_params);
+    if (out_blob.data) free(const_cast<uint8_t*>(out_blob.data));
+
+    return Void();
+}
+
+Return<ErrorCode> KeymasterDevice::abort(uint64_t operationHandle) {
+    return legacy_enum_conversion(keymaster_device_->abort(keymaster_device_, operationHandle));
+}
+
+IKeymasterDevice* HIDL_FETCH_IKeymasterDevice(const char* /* name */) {
+    keymaster2_device_t* dev = nullptr;
+
+    uint32_t version;
+    bool supports_ec;
+    auto rc = keymaster_device_initialize(&dev, &version, &supports_ec);
+    if (rc) return nullptr;
+
+    auto kmrc = ::keymaster::ConfigureDevice(dev);
+    if (kmrc != KM_ERROR_OK) {
+        dev->common.close(&dev->common);
+        return nullptr;
+    }
+
+    return new KeymasterDevice(dev, version, supports_ec);
+}
+
+}  // namespace implementation
+}  // namespace V3_0
+}  // namespace keymaster
+}  // namespace hardware
+}  // namespace android