diff --git a/CleanSpec.mk b/CleanSpec.mk
index 30ebdea..6d43bc0 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -168,15 +168,12 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
 
-# So...  funny story.  Recall when I mentioned above the
-# "JB MR2" thing?  I didn't mean that.  In fact, while I was
-# writing JB MR, my head was thinking 4.2, and things got
-# cross-wired as they are wont to do, and we ended up with
-# JB MR2, which didn't actually exist.
-#
-# Well, didn't exist then.
-#
-# Now it does.  Say hi, JB MR2!
+# And on to KLP...
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
+
+# KLP now based off API 18.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/APPS/*)
diff --git a/buildspec.mk.default b/buildspec.mk.default
index 2f84016..397194c 100644
--- a/buildspec.mk.default
+++ b/buildspec.mk.default
@@ -104,6 +104,11 @@
 #ENABLE_SVG:=false
 endif
 
+# To enable ART define WITH_ART:=true
+ifndef WITH_ART
+#WITH_ART:=true
+endif
+
 # when the build system changes such that this file must be updated, this
 # variable will be changed.  After you have modified this file with the new
 # changes (see buildspec.mk.default), update this to the new value from
diff --git a/core/base_rules.mk b/core/base_rules.mk
index f0a6398..f92cf6a 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -98,23 +98,27 @@
 endif
 
 ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
-ifdef LOCAL_IS_HOST_MODULE
-  partition_tag :=
-else
-ifeq (true,$(LOCAL_PROPRIETARY_MODULE))
-  partition_tag := _VENDOR
-else
-  # The definition of should-install-to-system will be different depending
-  # on which goal (e.g., sdk or just droid) is being built.
-  partition_tag := $(if $(call should-install-to-system,$(LOCAL_MODULE_TAGS)),,_DATA)
-endif
-endif
-
 LOCAL_MODULE_PATH := $(strip $(LOCAL_MODULE_PATH))
 ifeq ($(LOCAL_MODULE_PATH),)
-  LOCAL_MODULE_PATH := $($(my_prefix)OUT$(partition_tag)_$(LOCAL_MODULE_CLASS))
+  ifdef LOCAL_IS_HOST_MODULE
+    partition_tag :=
+  else
+  ifeq (true,$(LOCAL_PROPRIETARY_MODULE))
+    partition_tag := _VENDOR
+  else
+    # The definition of should-install-to-system will be different depending
+    # on which goal (e.g., sdk or just droid) is being built.
+    partition_tag := $(if $(call should-install-to-system,$(LOCAL_MODULE_TAGS)),,_DATA)
+  endif
+  endif
+  install_path_var := $(my_prefix)OUT$(partition_tag)_$(LOCAL_MODULE_CLASS)
+  ifeq (true,$(LOCAL_PRIVILEGED_MODULE))
+    install_path_var := $(install_path_var)_PRIVILEGED
+  endif
+
+  LOCAL_MODULE_PATH := $($(install_path_var))
   ifeq ($(strip $(LOCAL_MODULE_PATH)),)
-    $(error $(LOCAL_PATH): unhandled LOCAL_MODULE_CLASS "$(LOCAL_MODULE_CLASS)")
+    $(error $(LOCAL_PATH): unhandled install path "$(install_path_var)")
   endif
 endif
 endif # not LOCAL_UNINSTALLABLE_MODULE
diff --git a/core/build_id.mk b/core/build_id.mk
index ffff91e..40bb35d 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -23,7 +23,7 @@
 # (like "TC1-RC5").  It must be a single word, and is
 # capitalized by convention.
 #
-BUILD_ID := JB_MR2
+BUILD_ID := MASTER
 
 # DISPLAY_BUILD_NUMBER should only be set for development branches,
 # If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 8d84814..11f7f84 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -122,6 +122,7 @@
 LOCAL_PROTOC_FLAGS:=
 LOCAL_NO_CRT:=
 LOCAL_PROPRIETARY_MODULE:=
+LOCAL_PRIVILEGED_MODULE:=
 LOCAL_MODULE_OWNER:=
 LOCAL_CTS_TEST_PACKAGE:=
 LOCAL_CTS_TEST_RUNNER:=
diff --git a/core/combo/arch/arm/armv7-a-neon.mk b/core/combo/arch/arm/armv7-a-neon.mk
index f2c1ca7..057ce93 100644
--- a/core/combo/arch/arm/armv7-a-neon.mk
+++ b/core/combo/arch/arm/armv7-a-neon.mk
@@ -9,12 +9,16 @@
 ifeq ($(strip $(TARGET_CPU_VARIANT)), cortex-a15)
 	arch_variant_cflags := -mcpu=cortex-a15
 else
+ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a8)
+	arch_variant_cflags := -mcpu=cortex-a8
+else
 ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a7)
 	arch_variant_cflags := -mcpu=cortex-a7
 else
 	arch_variant_cflags := -march=armv7-a
 endif
 endif
+endif
 
 arch_variant_cflags += \
     -mfloat-abi=softfp \
diff --git a/core/envsetup.mk b/core/envsetup.mk
index f861586..8ac437e 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -196,6 +196,7 @@
 TARGET_OUT_SHARED_LIBRARIES:= $(TARGET_OUT)/lib
 TARGET_OUT_JAVA_LIBRARIES:= $(TARGET_OUT)/framework
 TARGET_OUT_APPS:= $(TARGET_OUT)/app
+TARGET_OUT_APPS_PRIVILEGED := $(TARGET_OUT)/priv-app
 TARGET_OUT_KEYLAYOUT := $(TARGET_OUT)/usr/keylayout
 TARGET_OUT_KEYCHARS := $(TARGET_OUT)/usr/keychars
 TARGET_OUT_ETC := $(TARGET_OUT)/etc
@@ -211,6 +212,7 @@
 TARGET_OUT_DATA_KEYCHARS := $(TARGET_OUT_KEYCHARS)
 TARGET_OUT_DATA_ETC := $(TARGET_OUT_ETC)
 TARGET_OUT_DATA_NATIVE_TESTS := $(TARGET_OUT_DATA)/nativetest
+TARGET_OUT_DATA_FAKE := $(TARGET_OUT_DATA)/fake_packages
 
 TARGET_OUT_CACHE := $(PRODUCT_OUT)/cache
 
diff --git a/core/main.mk b/core/main.mk
index e03801c..55de80f 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -183,6 +183,7 @@
 $(error stop)
 endif
 
+ifndef BUILD_EMULATOR
 ifeq (darwin,$(HOST_OS))
 GCC_REALPATH = $(realpath $(shell which $(HOST_CC)))
 ifneq ($(findstring llvm-gcc,$(GCC_REALPATH)),)
@@ -199,10 +200,11 @@
 else   # HOST_OS is not darwin
   BUILD_EMULATOR := true
 endif  # HOST_OS is darwin
+endif
 
 $(shell echo 'VERSIONS_CHECKED := $(VERSION_CHECK_SEQUENCE_NUMBER)' \
         > $(OUT_DIR)/versions_checked.mk)
-$(shell echo 'BUILD_EMULATOR := $(BUILD_EMULATOR)' \
+$(shell echo 'BUILD_EMULATOR ?= $(BUILD_EMULATOR)' \
         >> $(OUT_DIR)/versions_checked.mk)
 endif
 
diff --git a/core/package.mk b/core/package.mk
index 2012351..ff202cb 100644
--- a/core/package.mk
+++ b/core/package.mk
@@ -130,8 +130,7 @@
 
 LOCAL_PROGUARD_ENABLED:=$(strip $(LOCAL_PROGUARD_ENABLED))
 ifndef LOCAL_PROGUARD_ENABLED
-ifneq ($(filter user userdebug, $(TARGET_BUILD_VARIANT)),)
-    # turn on Proguard by default for user & userdebug build
+ifneq ($(DISABLE_PROGUARD),true)
     LOCAL_PROGUARD_ENABLED :=full
 endif
 endif
diff --git a/core/pathmap.mk b/core/pathmap.mk
index b76e0ed..78d4f66 100644
--- a/core/pathmap.mk
+++ b/core/pathmap.mk
@@ -34,7 +34,6 @@
     frameworks-native:frameworks/native/include \
     graphics:external/skia/include/core \
     libc:bionic/libc/include \
-    libdrm1:frameworks/base/media/libdrm/mobile1/include \
     libhardware:hardware/libhardware/include \
     libhardware_legacy:hardware/libhardware_legacy/include \
     libhost:build/libs/host/include \
diff --git a/core/product_config.mk b/core/product_config.mk
index bfbdf78..c8955f6 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -170,6 +170,10 @@
 endif
 endif
 
+ifeq ($(WITH_ART),)
+  WITH_ART := false
+endif
+
 # ---------------------------------------------------------------
 # Include the product definitions.
 # We need to do this to translate TARGET_PRODUCT into its
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index b9e1456..8fa5081 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -41,7 +41,7 @@
   # which is the version that we reveal to the end user.
   # Update this value when the platform version changes (rather
   # than overriding it somewhere else).  Can be an arbitrary string.
-  PLATFORM_VERSION := 4.3.2.1.000.000
+  PLATFORM_VERSION := KeyLimePie
 endif
 
 ifeq "" "$(PLATFORM_SDK_VERSION)"
@@ -59,7 +59,7 @@
 ifeq "" "$(PLATFORM_VERSION_CODENAME)"
   # This is the current development code-name, if the build is not a final
   # release build.  If this is a final release build, it is simply "REL".
-  PLATFORM_VERSION_CODENAME := REL
+  PLATFORM_VERSION_CODENAME := KeyLimePie
 endif
 
 ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
diff --git a/envsetup.sh b/envsetup.sh
index 2de2375..5460a0e 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1060,7 +1060,7 @@
     fi
 
     # issue "am" command to cause the hprof dump
-    local sdcard=$(adb shell echo -n '$EXTERNAL_STORAGE')
+    local sdcard=$(adb ${adbOptions} shell echo -n '$EXTERNAL_STORAGE')
     local devFile=$sdcard/hprof-$targetPid
     #local devFile=/data/local/hprof-$targetPid
     echo "Poking $targetPid and waiting for data..."
diff --git a/libs/host/Android.mk b/libs/host/Android.mk
index 9900f59..74afa55 100644
--- a/libs/host/Android.mk
+++ b/libs/host/Android.mk
@@ -2,8 +2,7 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
-	CopyFile.c \
-	pseudolocalize.cpp
+	CopyFile.c
 
 ifeq ($(HOST_OS),cygwin)
 LOCAL_CFLAGS += -DWIN32_EXE
diff --git a/libs/host/include/host/pseudolocalize.h b/libs/host/include/host/pseudolocalize.h
deleted file mode 100644
index 94cb034..0000000
--- a/libs/host/include/host/pseudolocalize.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef HOST_PSEUDOLOCALIZE_H
-#define HOST_PSEUDOLOCALIZE_H
-
-#include <string>
-
-std::string pseudolocalize_string(const std::string& source);
-
-#endif // HOST_PSEUDOLOCALIZE_H
-
diff --git a/libs/host/pseudolocalize.cpp b/libs/host/pseudolocalize.cpp
deleted file mode 100644
index a2b3c2f..0000000
--- a/libs/host/pseudolocalize.cpp
+++ /dev/null
@@ -1,119 +0,0 @@
-#include <host/pseudolocalize.h>
-
-using namespace std;
-
-static const char*
-pseudolocalize_char(char c)
-{
-    switch (c) {
-        case 'a':   return "\xc4\x83";
-        case 'b':   return "\xcf\x84";
-        case 'c':   return "\xc4\x8b";
-        case 'd':   return "\xc4\x8f";
-        case 'e':   return "\xc4\x99";
-        case 'f':   return "\xc6\x92";
-        case 'g':   return "\xc4\x9d";
-        case 'h':   return "\xd1\x9b";
-        case 'i':   return "\xcf\x8a";
-        case 'j':   return "\xc4\xb5";
-        case 'k':   return "\xc4\xb8";
-        case 'l':   return "\xc4\xba";
-        case 'm':   return "\xe1\xb8\xbf";
-        case 'n':   return "\xd0\xb8";
-        case 'o':   return "\xcf\x8c";
-        case 'p':   return "\xcf\x81";
-        case 'q':   return "\x51";
-        case 'r':   return "\xd2\x91";
-        case 's':   return "\xc5\xa1";
-        case 't':   return "\xd1\x82";
-        case 'u':   return "\xce\xb0";
-        case 'v':   return "\x56";
-        case 'w':   return "\xe1\xba\x85";
-        case 'x':   return "\xd1\x85";
-        case 'y':   return "\xe1\xbb\xb3";
-        case 'z':   return "\xc5\xba";
-        case 'A':   return "\xc3\x85";
-        case 'B':   return "\xce\xb2";
-        case 'C':   return "\xc4\x88";
-        case 'D':   return "\xc4\x90";
-        case 'E':   return "\xd0\x84";
-        case 'F':   return "\xce\x93";
-        case 'G':   return "\xc4\x9e";
-        case 'H':   return "\xc4\xa6";
-        case 'I':   return "\xd0\x87";
-        case 'J':   return "\xc4\xb5";
-        case 'K':   return "\xc4\xb6";
-        case 'L':   return "\xc5\x81";
-        case 'M':   return "\xe1\xb8\xbe";
-        case 'N':   return "\xc5\x83";
-        case 'O':   return "\xce\x98";
-        case 'P':   return "\xcf\x81";
-        case 'Q':   return "\x71";
-        case 'R':   return "\xd0\xaf";
-        case 'S':   return "\xc8\x98";
-        case 'T':   return "\xc5\xa6";
-        case 'U':   return "\xc5\xa8";
-        case 'V':   return "\xce\xbd";
-        case 'W':   return "\xe1\xba\x84";
-        case 'X':   return "\xc3\x97";
-        case 'Y':   return "\xc2\xa5";
-        case 'Z':   return "\xc5\xbd";
-        default:    return NULL;
-    }
-}
-
-/**
- * Converts characters so they look like they've been localized.
- *
- * Note: This leaves escape sequences untouched so they can later be
- * processed by ResTable::collectString in the normal way.
- */
-string
-pseudolocalize_string(const string& source)
-{
-    const char* s = source.c_str();
-    string result;
-    const size_t I = source.length();
-    for (size_t i=0; i<I; i++) {
-        char c = s[i];
-        if (c == '\\') {
-            if (i<I-1) {
-                result += '\\';
-                i++;
-                c = s[i];
-                switch (c) {
-                    case 'u':
-                        // this one takes up 5 chars
-                        result += string(s+i, 5);
-                        i += 4;
-                        break;
-                    case 't':
-                    case 'n':
-                    case '#':
-                    case '@':
-                    case '?':
-                    case '"':
-                    case '\'':
-                    case '\\':
-                    default:
-                        result += c;
-                        break;
-                }
-            } else {
-                result += c;
-            }
-        } else {
-            const char* p = pseudolocalize_char(c);
-            if (p != NULL) {
-                result += p;
-            } else {
-                result += c;
-            }
-        }
-    }
-
-    //printf("result=\'%s\'\n", result.c_str());
-    return result;
-}
-
-
diff --git a/target/product/base.mk b/target/product/base.mk
index 129fb2a..d3c18fb 100644
--- a/target/product/base.mk
+++ b/target/product/base.mk
@@ -44,8 +44,6 @@
     libcameraservice \
     libchromium_net \
     libdl \
-    libdrm1 \
-    libdrm1_jni \
     libeffects \
     libiprouteutil \
     libjni_latinime \
diff --git a/target/product/embedded.mk b/target/product/embedded.mk
index 0830101..15331a9 100644
--- a/target/product/embedded.mk
+++ b/target/product/embedded.mk
@@ -58,6 +58,7 @@
     linker \
     logcat \
     logwrapper \
+    reboot \
     service \
     servicemanager \
     surfaceflinger \
diff --git a/target/product/generic_no_telephony.mk b/target/product/generic_no_telephony.mk
index 194fb7a..784c2f9 100644
--- a/target/product/generic_no_telephony.mk
+++ b/target/product/generic_no_telephony.mk
@@ -25,12 +25,12 @@
     Calculator \
     Calendar \
     CertInstaller \
-    DrmProvider \
     Email \
     Exchange2 \
     FusedLocation \
     Gallery2 \
     InputDevices \
+    Keyguard \
     LatinIME \
     Launcher2 \
     Music \
@@ -41,6 +41,7 @@
     QuickSearchBox \
     Settings \
     SystemUI \
+    Terminal \
     CalendarProvider \
     bluetooth-health \
     hostapd \
diff --git a/target/product/large_emu_hw.mk b/target/product/large_emu_hw.mk
index 8a070b1..a918c1d 100644
--- a/target/product/large_emu_hw.mk
+++ b/target/product/large_emu_hw.mk
@@ -26,7 +26,6 @@
     Calculator \
     Calendar \
     CertInstaller \
-    DrmProvider \
     Email \
     Exchange2 \
     Gallery2 \
diff --git a/target/product/mini.mk b/target/product/mini.mk
index a1f6317..b5b0ffb 100644
--- a/target/product/mini.mk
+++ b/target/product/mini.mk
@@ -222,6 +222,7 @@
 PRODUCT_PACKAGES += \
     TestingCamera \
     Home \
+    Keyguard \
     SystemUI \
     Settings \
     libsurfaceflinger_ddmconnection
diff --git a/target/product/sdk.mk b/target/product/sdk.mk
index 51b90f5..8208934 100644
--- a/target/product/sdk.mk
+++ b/target/product/sdk.mk
@@ -24,6 +24,7 @@
 	Exchange2 \
 	FusedLocation \
 	Gallery \
+	Keyguard \
 	Music \
 	Mms \
 	OpenWnn \
@@ -38,7 +39,6 @@
 	Launcher2 \
 	Development \
 	DevelopmentSettings \
-	DrmProvider \
 	Fallback \
 	Settings \
 	SdkSetup \
diff --git a/tools/signapk/SignApk.java b/tools/signapk/SignApk.java
index adfe9a3..716ea3b 100644
--- a/tools/signapk/SignApk.java
+++ b/tools/signapk/SignApk.java
@@ -78,8 +78,26 @@
 import javax.crypto.spec.PBEKeySpec;
 
 /**
- * Command line tool to sign JAR files (including APKs and OTA updates) in
- * a way compatible with the mincrypt verifier, using SHA1 and RSA keys.
+ * HISTORICAL NOTE:
+ *
+ * Prior to the keylimepie release, SignApk ignored the signature
+ * algorithm specified in the certificate and always used SHA1withRSA.
+ *
+ * Starting with keylimepie, we support SHA256withRSA, and use the
+ * signature algorithm in the certificate to select which to use
+ * (SHA256withRSA or SHA1withRSA).
+ *
+ * Because there are old keys still in use whose certificate actually
+ * says "MD5withRSA", we treat these as though they say "SHA1withRSA"
+ * for compatibility with older releases.  This can be changed by
+ * altering the getAlgorithm() function below.
+ */
+
+
+/**
+ * Command line tool to sign JAR files (including APKs and OTA
+ * updates) in a way compatible with the mincrypt verifier, using RSA
+ * keys and SHA1 or SHA-256.
  */
 class SignApk {
     private static final String CERT_SF_NAME = "META-INF/CERT.SF";
@@ -91,6 +109,27 @@
 
     private static Provider sBouncyCastleProvider;
 
+    // bitmasks for which hash algorithms we need the manifest to include.
+    private static final int USE_SHA1 = 1;
+    private static final int USE_SHA256 = 2;
+
+    /**
+     * Return one of USE_SHA1 or USE_SHA256 according to the signature
+     * algorithm specified in the cert.
+     */
+    private static int getAlgorithm(X509Certificate cert) {
+        String sigAlg = cert.getSigAlgName();
+        if ("SHA1withRSA".equals(sigAlg) ||
+            "MD5withRSA".equals(sigAlg)) {     // see "HISTORICAL NOTE" above.
+            return USE_SHA1;
+        } else if ("SHA256withRSA".equals(sigAlg)) {
+            return USE_SHA256;
+        } else {
+            throw new IllegalArgumentException("unsupported signature algorithm \"" + sigAlg +
+                                               "\" in cert [" + cert.getSubjectDN());
+        }
+    }
+
     // Files matching this pattern are not copied to the output.
     private static Pattern stripPattern =
         Pattern.compile("^(META-INF/((.*)[.](SF|RSA|DSA)|com/android/otacert))|(" +
@@ -182,8 +221,11 @@
         }
     }
 
-    /** Add the SHA1 of every file to the manifest, creating it if necessary. */
-    private static Manifest addDigestsToManifest(JarFile jar)
+    /**
+     * Add the hash(es) of every file to the manifest, creating it if
+     * necessary.
+     */
+    private static Manifest addDigestsToManifest(JarFile jar, int hashes)
         throws IOException, GeneralSecurityException {
         Manifest input = jar.getManifest();
         Manifest output = new Manifest();
@@ -195,7 +237,15 @@
             main.putValue("Created-By", "1.0 (Android SignApk)");
         }
 
-        MessageDigest md = MessageDigest.getInstance("SHA1");
+        MessageDigest md_sha1 = null;
+        MessageDigest md_sha256 = null;
+        if ((hashes & USE_SHA1) != 0) {
+            md_sha1 = MessageDigest.getInstance("SHA1");
+        }
+        if ((hashes & USE_SHA256) != 0) {
+            md_sha256 = MessageDigest.getInstance("SHA256");
+        }
+
         byte[] buffer = new byte[4096];
         int num;
 
@@ -216,14 +266,21 @@
                 (stripPattern == null || !stripPattern.matcher(name).matches())) {
                 InputStream data = jar.getInputStream(entry);
                 while ((num = data.read(buffer)) > 0) {
-                    md.update(buffer, 0, num);
+                    if (md_sha1 != null) md_sha1.update(buffer, 0, num);
+                    if (md_sha256 != null) md_sha256.update(buffer, 0, num);
                 }
 
                 Attributes attr = null;
                 if (input != null) attr = input.getAttributes(name);
                 attr = attr != null ? new Attributes(attr) : new Attributes();
-                attr.putValue("SHA1-Digest",
-                              new String(Base64.encode(md.digest()), "ASCII"));
+                if (md_sha1 != null) {
+                    attr.putValue("SHA1-Digest",
+                                  new String(Base64.encode(md_sha1.digest()), "ASCII"));
+                }
+                if (md_sha256 != null) {
+                    attr.putValue("SHA-256-Digest",
+                                  new String(Base64.encode(md_sha256.digest()), "ASCII"));
+                }
                 output.getEntries().put(name, attr);
             }
         }
@@ -241,9 +298,10 @@
     private static void addOtacert(JarOutputStream outputJar,
                                    File publicKeyFile,
                                    long timestamp,
-                                   Manifest manifest)
+                                   Manifest manifest,
+                                   int hash)
         throws IOException, GeneralSecurityException {
-        MessageDigest md = MessageDigest.getInstance("SHA1");
+        MessageDigest md = MessageDigest.getInstance(hash == USE_SHA1 ? "SHA1" : "SHA256");
 
         JarEntry je = new JarEntry(OTACERT_NAME);
         je.setTime(timestamp);
@@ -258,7 +316,7 @@
         input.close();
 
         Attributes attr = new Attributes();
-        attr.putValue("SHA1-Digest",
+        attr.putValue(hash == USE_SHA1 ? "SHA1-Digest" : "SHA-256-Digest",
                       new String(Base64.encode(md.digest()), "ASCII"));
         manifest.getEntries().put(OTACERT_NAME, attr);
     }
@@ -293,14 +351,16 @@
     }
 
     /** Write a .SF file with a digest of the specified manifest. */
-    private static void writeSignatureFile(Manifest manifest, OutputStream out)
+    private static void writeSignatureFile(Manifest manifest, OutputStream out,
+                                           int hash)
         throws IOException, GeneralSecurityException {
         Manifest sf = new Manifest();
         Attributes main = sf.getMainAttributes();
         main.putValue("Signature-Version", "1.0");
         main.putValue("Created-By", "1.0 (Android SignApk)");
 
-        MessageDigest md = MessageDigest.getInstance("SHA1");
+        MessageDigest md = MessageDigest.getInstance(
+            hash == USE_SHA256 ? "SHA256" : "SHA1");
         PrintStream print = new PrintStream(
             new DigestOutputStream(new ByteArrayOutputStream(), md),
             true, "UTF-8");
@@ -308,7 +368,7 @@
         // Digest of the entire manifest
         manifest.write(print);
         print.flush();
-        main.putValue("SHA1-Digest-Manifest",
+        main.putValue(hash == USE_SHA256 ? "SHA-256-Digest-Manifest" : "SHA1-Digest-Manifest",
                       new String(Base64.encode(md.digest()), "ASCII"));
 
         Map<String, Attributes> entries = manifest.getEntries();
@@ -322,7 +382,7 @@
             print.flush();
 
             Attributes sfAttr = new Attributes();
-            sfAttr.putValue("SHA1-Digest",
+            sfAttr.putValue(hash == USE_SHA256 ? "SHA-256-Digest" : "SHA1-Digest-Manifest",
                             new String(Base64.encode(md.digest()), "ASCII"));
             sf.getEntries().put(entry.getKey(), sfAttr);
         }
@@ -353,7 +413,8 @@
         JcaCertStore certs = new JcaCertStore(certList);
 
         CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
-        ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA1withRSA")
+        ContentSigner signer = new JcaContentSignerBuilder(
+            getAlgorithm(publicKey) == USE_SHA256 ? "SHA256withRSA" : "SHA1withRSA")
             .setProvider(sBouncyCastleProvider)
             .build(privateKey);
         gen.addSignerInfoGenerator(
@@ -362,7 +423,7 @@
                 .setProvider(sBouncyCastleProvider)
                 .build())
             .setDirectSignature(true)
-            .build(sha1Signer, publicKey));
+            .build(signer, publicKey));
         gen.addCertificates(certs);
         CMSSignedData sigData = gen.generate(data, false);
 
@@ -499,14 +560,19 @@
                 signer = new WholeFileSignerOutputStream(out, outputStream);
                 JarOutputStream outputJar = new JarOutputStream(signer);
 
-                Manifest manifest = addDigestsToManifest(inputJar);
+                int hash = getAlgorithm(publicKey);
+
+                // Assume the certificate is valid for at least an hour.
+                long timestamp = publicKey.getNotBefore().getTime() + 3600L * 1000;
+
+                Manifest manifest = addDigestsToManifest(inputJar, hash);
+                copyFiles(manifest, inputJar, outputJar, timestamp);
+                addOtacert(outputJar, publicKeyFile, timestamp, manifest, hash);
+
                 signFile(manifest, inputJar,
                          new X509Certificate[]{ publicKey },
                          new PrivateKey[]{ privateKey },
                          outputJar);
-                // Assume the certificate is valid for at least an hour.
-                long timestamp = publicKey.getNotBefore().getTime() + 3600L * 1000;
-                addOtacert(outputJar, publicKeyFile, timestamp, manifest);
 
                 signer.notifyClosing();
                 outputJar.close();
@@ -605,13 +671,8 @@
         // Assume the certificate is valid for at least an hour.
         long timestamp = publicKey[0].getNotBefore().getTime() + 3600L * 1000;
 
-        JarEntry je;
-
-        // Everything else
-        copyFiles(manifest, inputJar, outputJar, timestamp);
-
         // MANIFEST.MF
-        je = new JarEntry(JarFile.MANIFEST_NAME);
+        JarEntry je = new JarEntry(JarFile.MANIFEST_NAME);
         je.setTime(timestamp);
         outputJar.putNextEntry(je);
         manifest.write(outputJar);
@@ -624,7 +685,7 @@
             je.setTime(timestamp);
             outputJar.putNextEntry(je);
             ByteArrayOutputStream baos = new ByteArrayOutputStream();
-            writeSignatureFile(manifest, baos);
+            writeSignatureFile(manifest, baos, getAlgorithm(publicKey[k]));
             byte[] signedData = baos.toByteArray();
             outputJar.write(signedData);
 
@@ -671,14 +732,21 @@
 
         JarFile inputJar = null;
         FileOutputStream outputFile = null;
+        int hashes = 0;
 
         try {
             File firstPublicKeyFile = new File(args[argstart+0]);
 
             X509Certificate[] publicKey = new X509Certificate[numKeys];
-            for (int i = 0; i < numKeys; ++i) {
-                int argNum = argstart + i*2;
-                publicKey[i] = readPublicKey(new File(args[argNum]));
+            try {
+                for (int i = 0; i < numKeys; ++i) {
+                    int argNum = argstart + i*2;
+                    publicKey[i] = readPublicKey(new File(args[argNum]));
+                    hashes |= getAlgorithm(publicKey[i]);
+                }
+            } catch (IllegalArgumentException e) {
+                System.err.println(e);
+                System.exit(1);
             }
 
             // Set the ZIP file timestamp to the starting valid time
@@ -710,8 +778,9 @@
                 // (~0.1% on full OTA packages I tested).
                 outputJar.setLevel(9);
 
-                signFile(addDigestsToManifest(inputJar), inputJar,
-                         publicKey, privateKey, outputJar);
+                Manifest manifest = addDigestsToManifest(inputJar, hashes);
+                copyFiles(manifest, inputJar, outputJar, timestamp);
+                signFile(manifest, inputJar, publicKey, privateKey, outputJar);
                 outputJar.close();
             }
         } catch (Exception e) {
diff --git a/tools/zipalign/Android.mk b/tools/zipalign/Android.mk
index 5542280..708c8bf 100644
--- a/tools/zipalign/Android.mk
+++ b/tools/zipalign/Android.mk
@@ -15,6 +15,7 @@
 LOCAL_C_INCLUDES += external/zlib
 
 LOCAL_STATIC_LIBRARIES := \
+	libandroidfw \
 	libutils \
 	libcutils \
 	liblog
diff --git a/tools/zipalign/ZipFile.cpp b/tools/zipalign/ZipFile.cpp
index 3994c31..8057068 100644
--- a/tools/zipalign/ZipFile.cpp
+++ b/tools/zipalign/ZipFile.cpp
@@ -20,8 +20,8 @@
 
 #define LOG_TAG "zip"
 
+#include <androidfw/ZipUtils.h>
 #include <utils/Log.h>
-#include <utils/ZipUtils.h>
 
 #include "ZipFile.h"