diff --git a/core/java/android/security/IKeystoreService.aidl b/core/java/android/security/IKeystoreService.aidl
index d24bc13..14b5748 100644
--- a/core/java/android/security/IKeystoreService.aidl
+++ b/core/java/android/security/IKeystoreService.aidl
@@ -60,8 +60,8 @@
 
     // Keymaster 0.4 methods
     int addRngEntropy(in byte[] data);
-    int generateKey(String alias, in KeymasterArguments arguments, int uid, int flags,
-        out KeyCharacteristics characteristics);
+    int generateKey(String alias, in KeymasterArguments arguments, in byte[] entropy, int uid,
+        int flags, out KeyCharacteristics characteristics);
     int getKeyCharacteristics(String alias, in KeymasterBlob clientId, in KeymasterBlob appId,
         out KeyCharacteristics characteristics);
     int importKey(String alias, in KeymasterArguments arguments, int format,
@@ -69,7 +69,7 @@
     ExportResult exportKey(String alias, int format, in KeymasterBlob clientId,
         in KeymasterBlob appId);
     OperationResult begin(IBinder appToken, String alias, int purpose, boolean pruneable,
-        in KeymasterArguments params, out KeymasterArguments operationParams);
+        in KeymasterArguments params, in byte[] entropy, out KeymasterArguments operationParams);
     OperationResult update(IBinder token, in KeymasterArguments params, in byte[] input);
     OperationResult finish(IBinder token, in KeymasterArguments params, in byte[] signature);
     int abort(IBinder handle);
diff --git a/keystore/java/android/security/KeyStore.java b/keystore/java/android/security/KeyStore.java
index 957e3c1..f68b3f6 100644
--- a/keystore/java/android/security/KeyStore.java
+++ b/keystore/java/android/security/KeyStore.java
@@ -389,19 +389,19 @@
         }
     }
 
-    public int generateKey(String alias, KeymasterArguments args, int uid, int flags,
-            KeyCharacteristics outCharacteristics) {
+    public int generateKey(String alias, KeymasterArguments args, byte[] entropy, int uid,
+            int flags, KeyCharacteristics outCharacteristics) {
         try {
-            return mBinder.generateKey(alias, args, uid, flags, outCharacteristics);
+            return mBinder.generateKey(alias, args, entropy, uid, flags, outCharacteristics);
         } catch (RemoteException e) {
             Log.w(TAG, "Cannot connect to keystore", e);
             return SYSTEM_ERROR;
         }
     }
 
-    public int generateKey(String alias, KeymasterArguments args, int flags,
+    public int generateKey(String alias, KeymasterArguments args, byte[] entropy, int flags,
             KeyCharacteristics outCharacteristics) {
-        return generateKey(alias, args, UID_SELF, flags, outCharacteristics);
+        return generateKey(alias, args, entropy, UID_SELF, flags, outCharacteristics);
     }
 
     public int getKeyCharacteristics(String alias, KeymasterBlob clientId, KeymasterBlob appId,
@@ -441,9 +441,9 @@
     }
 
     public OperationResult begin(String alias, int purpose, boolean pruneable,
-            KeymasterArguments args, KeymasterArguments outArgs) {
+            KeymasterArguments args, byte[] entropy, KeymasterArguments outArgs) {
         try {
-            return mBinder.begin(getToken(), alias, purpose, pruneable, args, outArgs);
+            return mBinder.begin(getToken(), alias, purpose, pruneable, args, entropy, outArgs);
         } catch (RemoteException e) {
             Log.w(TAG, "Cannot connect to keystore", e);
             return null;
diff --git a/keystore/tests/src/android/security/KeyStoreTest.java b/keystore/tests/src/android/security/KeyStoreTest.java
index f755bb0..7468fb5e 100644
--- a/keystore/tests/src/android/security/KeyStoreTest.java
+++ b/keystore/tests/src/android/security/KeyStoreTest.java
@@ -717,7 +717,7 @@
                 RSAKeyGenParameterSpec.F4.longValue());
 
         KeyCharacteristics outCharacteristics = new KeyCharacteristics();
-        int result = mKeyStore.generateKey(name, args, 0, outCharacteristics);
+        int result = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
         assertEquals("generateRsaKey should succeed", KeyStore.NO_ERROR, result);
         return outCharacteristics;
     }
@@ -726,6 +726,24 @@
         generateRsaKey("test");
         mKeyStore.delete("test");
     }
+
+    public void testGenerateRsaWithEntropy() throws Exception {
+        byte[] entropy = new byte[] {1,2,3,4,5};
+        String name = "test";
+        KeymasterArguments args = new KeymasterArguments();
+        args.addInt(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_ENCRYPT);
+        args.addInt(KeymasterDefs.KM_TAG_PURPOSE, KeymasterDefs.KM_PURPOSE_DECRYPT);
+        args.addInt(KeymasterDefs.KM_TAG_ALGORITHM, KeymasterDefs.KM_ALGORITHM_RSA);
+        args.addInt(KeymasterDefs.KM_TAG_PADDING, KeymasterDefs.KM_PAD_NONE);
+        args.addInt(KeymasterDefs.KM_TAG_KEY_SIZE, 2048);
+        args.addLong(KeymasterDefs.KM_TAG_RSA_PUBLIC_EXPONENT,
+                RSAKeyGenParameterSpec.F4.longValue());
+
+        KeyCharacteristics outCharacteristics = new KeyCharacteristics();
+        int result = mKeyStore.generateKey(name, args, entropy, 0, outCharacteristics);
+        assertEquals("generateKey should succeed", KeyStore.NO_ERROR, result);
+    }
+
     public void testGenerateAndDelete() throws Exception {
         generateRsaKey("test");
         assertTrue("delete should succeed", mKeyStore.delete("test"));
@@ -756,7 +774,7 @@
                 RSAKeyGenParameterSpec.F4.longValue());
 
         KeyCharacteristics outCharacteristics = new KeyCharacteristics();
-        int result = mKeyStore.generateKey(name, args, 0, outCharacteristics);
+        int result = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
         assertEquals("generateRsaKey should succeed", KeyStore.NO_ERROR, result);
         assertEquals("getKeyCharacteristics should fail without application ID",
                 KeymasterDefs.KM_ERROR_INVALID_KEY_BLOB,
@@ -790,13 +808,13 @@
         args.addInt(KeymasterDefs.KM_TAG_MAC_LENGTH, 16);
 
         KeyCharacteristics outCharacteristics = new KeyCharacteristics();
-        int rc = mKeyStore.generateKey(name, args, 0, outCharacteristics);
+        int rc = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
         assertEquals("Generate should succeed", KeyStore.NO_ERROR, rc);
 
         KeymasterArguments out = new KeymasterArguments();
         args = new KeymasterArguments();
         OperationResult result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT,
-                true, args, out);
+                true, args, null, out);
         IBinder token = result.token;
         assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
         result = mKeyStore.update(token, null, new byte[] {0x01, 0x02, 0x03, 0x04});
@@ -826,7 +844,7 @@
     private byte[] doOperation(String name, int purpose, byte[] in, KeymasterArguments beginArgs) {
         KeymasterArguments out = new KeymasterArguments();
         OperationResult result = mKeyStore.begin(name, purpose,
-                true, beginArgs, out);
+                true, beginArgs, null, out);
         assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
         IBinder token = result.token;
         result = mKeyStore.update(token, null, in);
@@ -885,18 +903,19 @@
         args.addInt(KeymasterDefs.KM_TAG_MAC_LENGTH, 16);
 
         KeyCharacteristics outCharacteristics = new KeyCharacteristics();
-        int rc = mKeyStore.generateKey(name, args, 0, outCharacteristics);
+        int rc = mKeyStore.generateKey(name, args, null, 0, outCharacteristics);
         assertEquals("Generate should succeed", KeyStore.NO_ERROR, rc);
 
         KeymasterArguments out = new KeymasterArguments();
         args = new KeymasterArguments();
         OperationResult result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT,
-                true, args, out);
+                true, args, null, out);
         assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
         IBinder first = result.token;
         // Implementation detail: softkeymaster supports 16 concurrent operations
         for (int i = 0; i < 16; i++) {
-            result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT, true, args, out);
+            result = mKeyStore.begin(name, KeymasterDefs.KM_PURPOSE_ENCRYPT, true, args, null,
+                    out);
             assertEquals("Begin should succeed", KeyStore.NO_ERROR, result.resultCode);
         }
         // At this point the first operation should be pruned.