use framework base64 implementation

Change-Id: Ib1dc595e53d64901f81d06350c6ab9b138beff7e

2 files changed, 3 insertions, 169 deletions

diff --git a/mms-common/java/com/android/mmscommon/mms/pdu/Base64.java b/mms-common/java/com/android/mmscommon/mms/pdu/Base64.java
deleted file mode 100644
index 4c95dec..0000000
--- a/mms-common/java/com/android/mmscommon/mms/pdu/Base64.java
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright (C) 2007 Esmertec AG.
- * 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 com.android.mmscommon.mms.pdu;
-
-public class Base64 {
-    /**
-     * Used to get the number of Quadruples.
-     */
-    static final int FOURBYTE = 4;
-
-    /**
-     * Byte used to pad output.
-     */
-    static final byte PAD = (byte) '=';
-
-    /**
-     * The base length.
-     */
-    static final int BASELENGTH = 255;
-
-    // Create arrays to hold the base64 characters
-    private static byte[] base64Alphabet = new byte[BASELENGTH];
-
-    // Populating the character arrays
-    static {
-        for (int i = 0; i < BASELENGTH; i++) {
-            base64Alphabet[i] = (byte) -1;
-        }
-        for (int i = 'Z'; i >= 'A'; i--) {
-            base64Alphabet[i] = (byte) (i - 'A');
-        }
-        for (int i = 'z'; i >= 'a'; i--) {
-            base64Alphabet[i] = (byte) (i - 'a' + 26);
-        }
-        for (int i = '9'; i >= '0'; i--) {
-            base64Alphabet[i] = (byte) (i - '0' + 52);
-        }
-
-        base64Alphabet['+'] = 62;
-        base64Alphabet['/'] = 63;
-    }
-
-    /**
-     * Decodes Base64 data into octects
-     *
-     * @param base64Data Byte array containing Base64 data
-     * @return Array containing decoded data.
-     */
-    public static byte[] decodeBase64(byte[] base64Data) {
-        // RFC 2045 requires that we discard ALL non-Base64 characters
-        base64Data = discardNonBase64(base64Data);
-
-        // handle the edge case, so we don't have to worry about it later
-        if (base64Data.length == 0) {
-            return new byte[0];
-        }
-
-        int numberQuadruple = base64Data.length / FOURBYTE;
-        byte decodedData[] = null;
-        byte b1 = 0, b2 = 0, b3 = 0, b4 = 0, marker0 = 0, marker1 = 0;
-
-        // Throw away anything not in base64Data
-
-        int encodedIndex = 0;
-        int dataIndex = 0;
-        {
-            // this sizes the output array properly - rlw
-            int lastData = base64Data.length;
-            // ignore the '=' padding
-            while (base64Data[lastData - 1] == PAD) {
-                if (--lastData == 0) {
-                    return new byte[0];
-                }
-            }
-            decodedData = new byte[lastData - numberQuadruple];
-        }
-
-        for (int i = 0; i < numberQuadruple; i++) {
-            dataIndex = i * 4;
-            marker0 = base64Data[dataIndex + 2];
-            marker1 = base64Data[dataIndex + 3];
-
-            b1 = base64Alphabet[base64Data[dataIndex]];
-            b2 = base64Alphabet[base64Data[dataIndex + 1]];
-
-            if (marker0 != PAD && marker1 != PAD) {
-                //No PAD e.g 3cQl
-                b3 = base64Alphabet[marker0];
-                b4 = base64Alphabet[marker1];
-
-                decodedData[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
-                decodedData[encodedIndex + 1] =
-                    (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
-                decodedData[encodedIndex + 2] = (byte) (b3 << 6 | b4);
-            } else if (marker0 == PAD) {
-                //Two PAD e.g. 3c[Pad][Pad]
-                decodedData[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
-            } else if (marker1 == PAD) {
-                //One PAD e.g. 3cQ[Pad]
-                b3 = base64Alphabet[marker0];
-
-                decodedData[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
-                decodedData[encodedIndex + 1] =
-                    (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
-            }
-            encodedIndex += 3;
-        }
-        return decodedData;
-    }
-
-    /**
-     * Check octect wheter it is a base64 encoding.
-     *
-     * @param octect to be checked byte
-     * @return ture if it is base64 encoding, false otherwise.
-     */
-    private static boolean isBase64(byte octect) {
-        if (octect == PAD) {
-            return true;
-        } else if (base64Alphabet[octect] == -1) {
-            return false;
-        } else {
-            return true;
-        }
-    }
-
-    /**
-     * Discards any characters outside of the base64 alphabet, per
-     * the requirements on page 25 of RFC 2045 - "Any characters
-     * outside of the base64 alphabet are to be ignored in base64
-     * encoded data."
-     *
-     * @param data The base-64 encoded data to groom
-     * @return The data, less non-base64 characters (see RFC 2045).
-     */
-    static byte[] discardNonBase64(byte[] data) {
-        byte groomedData[] = new byte[data.length];
-        int bytesCopied = 0;
-
-        for (int i = 0; i < data.length; i++) {
-            if (isBase64(data[i])) {
-                groomedData[bytesCopied++] = data[i];
-            }
-        }
-
-        byte packedData[] = new byte[bytesCopied];
-
-        System.arraycopy(groomedData, 0, packedData, 0, bytesCopied);
-
-        return packedData;
-    }
-}
diff --git a/mms-common/java/com/android/mmscommon/mms/pdu/PduParser.java b/mms-common/java/com/android/mmscommon/mms/pdu/PduParser.java
index 9253f83..6a58ba6 100644
--- a/mms-common/java/com/android/mmscommon/mms/pdu/PduParser.java
+++ b/mms-common/java/com/android/mmscommon/mms/pdu/PduParser.java
@@ -17,14 +17,15 @@
 
 package com.android.mmscommon.mms.pdu;
 
-import com.android.mmscommon.ContentType;
 import com.android.mmscommon.CharacterSets;
+import com.android.mmscommon.ContentType;
 import com.android.mmscommon.EncodedStringValue;
 import com.android.mmscommon.InvalidHeaderValueException;
 import com.android.mmscommon.PduHeaders;
 
 import android.util.Config;
 import android.util.Log;
+import android.util.base64.Base64;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -790,7 +791,7 @@ public class PduParser {
                     String encoding = new String(partDataEncoding);
                     if (encoding.equalsIgnoreCase(PduPart.P_BASE64)) {
                         // Decode "base64" into "binary".
-                        partData = Base64.decodeBase64(partData);
+                        partData = Base64.decode(partData, Base64.DEFAULT);
                     } else if (encoding.equalsIgnoreCase(PduPart.P_QUOTED_PRINTABLE)) {
                         // Decode "quoted-printable" into "binary".
                         partData = QuotedPrintable.decodeQuotedPrintable(partData);