M7350v1_en_gpl

base/core/java/android/security/Md5MessageDigest.java

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+/*
+ * Copyright (C) 2007 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;
+
+/**
+ * Provides the MD5 hash encryption.
+ */
+public class Md5MessageDigest extends MessageDigest
+{
+    // ptr to native context
+    private int mNativeMd5Context;
+    
+    public Md5MessageDigest()
+    {
+        init();
+    }
+    
+    public byte[] digest(byte[] input)
+    {
+        update(input);
+        return digest();
+    }
+
+    private native void init();
+    public native void update(byte[] input);  
+    public native byte[] digest();
+    native public void reset();
+}

base/core/java/android/security/MessageDigest.java

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+/*
+ * Copyright (C) 2007 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;
+
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Base class for producing a message digest from different hash encryptions.
+ */
+public abstract class MessageDigest 
+{    
+    /**
+     * Returns a digest object of the specified type.
+     * 
+     * @param algorithm  The type of hash function to use. Valid values are
+     *                   <em>SHA-1</em> and <em>MD5</em>.
+     * @return The respective MessageDigest object. Either a 
+     *         {@link android.security.Sha1MessageDigest} or
+     *         {@link android.security.Md5MessageDigest} object.
+     * @throws NoSuchAlgorithmException If an invalid <var>algorithm</var>
+     *                                  is given.
+     */
+    public static MessageDigest getInstance(String algorithm) 
+        throws NoSuchAlgorithmException
+    {
+        if (algorithm == null) {
+            return null;
+        }
+        
+        if (algorithm.equals("SHA-1")) {
+            return new Sha1MessageDigest();
+        }
+        else if (algorithm.equals("MD5")) {
+            return new Md5MessageDigest();
+        }
+        
+        throw new NoSuchAlgorithmException();
+    }
+    
+    public abstract void update(byte[] input);    
+    public abstract byte[] digest();
+    
+    /**
+     * Produces a message digest for the given input.
+     * 
+     * @param input  The message to encrypt.
+     * @return The digest (hash sum).
+     */
+    public abstract byte[] digest(byte[] input);
+}

base/core/java/android/security/Sha1MessageDigest.java

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+/*
+ * Copyright (C) 2007 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;
+
+/**
+ * Provides the SHA-1 hash encyption.
+ */
+public class Sha1MessageDigest extends MessageDigest
+{
+    // ptr to native context
+    private int mNativeSha1Context;
+    
+    public Sha1MessageDigest()
+    {
+        init();
+    }
+    
+    public byte[] digest(byte[] input)
+    {
+        update(input);
+        return digest();
+    }
+
+    private native void init();
+    public native void update(byte[] input);  
+    public native byte[] digest();
+    native public void reset();
+}

base/core/java/android/security/package.html

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+<HTML>
+<BODY>
+Utilities for encrypting messages from hash functions.
+{@hide}
+</BODY>
+</HTML>