diff --git a/keystore/java/android/security/Keystore.java b/keystore/java/android/security/Keystore.java
index 3f83473..8de20af 100644
--- a/keystore/java/android/security/Keystore.java
+++ b/keystore/java/android/security/Keystore.java
@@ -46,6 +46,13 @@
      */
     public abstract String[] getAllUserkeyKeys();
 
+    public abstract String[] getSupportedKeyStrenghs();
+
+    public abstract String generateKeyPair(String keyStrength, String challenge,
+            String organizations) throws UnsupportedKeyStrengthException;
+
+    public abstract void addCertificate(String cert);
+
     private static class FileKeystore extends Keystore {
         private static final String SERVICE_NAME = "keystore";
         private static final String LIST_CERTIFICATES = "listcerts";
@@ -99,5 +106,40 @@
                 return NOTFOUND;
             }
         }
+
+        @Override
+        public String[] getSupportedKeyStrenghs() {
+            // TODO: real implementation
+            return new String[] {"High Grade", "Medium Grade"};
+        }
+
+        @Override
+        public String generateKeyPair(String keyStrength, String challenge,
+                String organizations) throws UnsupportedKeyStrengthException {
+            // TODO: real implementation
+            return "-----BEGIN CERTIFICATE REQUEST-----"
+                    + "\nMIICzjCCAbYCAQAwgYgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlh"
+                    + "\nMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3MRMwEQYDVQQKEwpHb29nbGUgSW5jMRYw"
+                    + "\nFAYDVQQLEw1SZW1vdGUgQWNjZXNzMRAwDgYDVQQLEwdHbGFwdG9wMQ0wCwYDVQQD"
+                    + "\nEwR0ZXN0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAznwy7a16O35u"
+                    + "\nODLQOw6yHAxozrrX1J+c0reiIh8GYohwKrBedFnQ/FnTls6bxY4fNHD+SZvFFgvU"
+                    + "\nECBFOfRmRm7AFo51qT0t2a8qgvDLM6L1qGkmy94W28Q3OlcpF2QianHYdjyGT+Ac"
+                    + "\nYDek1Zi/E/mdPzuVM/K8tkB7n8ktC0PTm1ZtdMRauE5R0WrEhWuF6In/2gy1Q/Zh"
+                    + "\noy7/zQqpbPl2ouulvkx1Y3OXHM6XPNFLoHS1gH0HyAuBUokO0QmetRn6ngJSvz7e"
+                    + "\nVD7QYRppGp+g4BxqaV9XSxhaaKrMs4PAld9enV51X9qjvjCRBve2QxtuJgMfGJdU"
+                    + "\njGr/JweZoQIDAQABoAAwDQYJKoZIhvcNAQEFBQADggEBADtxOtEseoLOVYh6sh4b"
+                    + "\nWCdngK87uHn2bdGipFwKdNTxQDdxNQLAKdoGYIfbVsC1cDgFiufeNwVukxxymdnm"
+                    + "\nk0GGK+0O0tZKENv8ysgfbgEsHpJH9FoR5Y5XEq1etejkcgCp59dyhrSk0DLyVm0D"
+                    + "\nIfTC/nsK95H7AAGOkbbDFo2otyLNNrthYncQ9diAG0UzzLacA+86JXZmD3HyC48u"
+                    + "\nI9hsivVnTTfl9afcfVAhfxbQ6HgkhZZjbjFjfABSd4v8wKlAAqK58VxCajNVOVcV"
+                    + "\ncCzOWf6NpE7xEHCf32i8bWDP6hi0WgQcdpQwnZNKhhTLGNb23Uty6HYlJhbxexC7"
+                    + "\nUoM="
+                    + "\n-----END CERTIFICATE REQUEST-----";
+        }
+
+        @Override
+        public void addCertificate(String cert) {
+            // TODO: real implementation
+        }
     }
 }
diff --git a/keystore/java/android/security/UnsupportedKeyStrengthException.java b/keystore/java/android/security/UnsupportedKeyStrengthException.java
new file mode 100644
index 0000000..d0732c2
--- /dev/null
+++ b/keystore/java/android/security/UnsupportedKeyStrengthException.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+package android.security;
+
+/**
+ * Thrown when the specified key strength is not supported by the system.
+ * {@hide}
+ */
+public class UnsupportedKeyStrengthException extends Exception {
+    public UnsupportedKeyStrengthException(String msg) {
+        super(msg);
+    }
+}