php、java、android、ios通用的3des方法(推荐)

php服务器，java服务器，android，ios开发兼容的3des加密解密，

php

				?

									<?php

									class DES3 {

									    var $key = "my.oschina.net/penngo?#@";

									    var $iv = "01234567";

									    function encrypt($input){

									        $size = mcrypt_get_block_size(MCRYPT_3DES,MCRYPT_MODE_CBC);

									        $input = $this->pkcs5_pad($input, $size);

									        $key = str_pad($this->key,24,'0');

									        $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');

									        if( $this->iv == '' )

									        {

									            $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

									        }

									        else

									        {

									            $iv = $this->iv;

									        }

									        @mcrypt_generic_init($td, $key, $iv);

									        $data = mcrypt_generic($td, $input);

									        mcrypt_generic_deinit($td);

									        mcrypt_module_close($td);

									        $data = base64_encode($data);

									        return $data;

									    }

									    function decrypt($encrypted){

									        $encrypted = base64_decode($encrypted);

									        $key = str_pad($this->key,24,'0');

									        $td = mcrypt_module_open(MCRYPT_3DES,'',MCRYPT_MODE_CBC,'');

									        if( $this->iv == '' )

									        {

									            $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);

									        }

									        else

									        {

									            $iv = $this->iv;

									        }

									        $ks = mcrypt_enc_get_key_size($td);

									        @mcrypt_generic_init($td, $key, $iv);

									        $decrypted = mdecrypt_generic($td, $encrypted);

									        mcrypt_generic_deinit($td);

									        mcrypt_module_close($td);

									        $y=$this->pkcs5_unpad($decrypted);

									        return $y;

									    }

									    function pkcs5_pad ($text, $blocksize) {

									        $pad = $blocksize - (strlen($text) % $blocksize);

									        return $text . str_repeat(chr($pad), $pad);

									    }

									    function pkcs5_unpad($text){

									        $pad = ord($text{strlen($text)-1});

									        if ($pad > strlen($text)) {

									            return false;

									        }

									        if (strspn($text, chr($pad), strlen($text) - $pad) != $pad){

									            return false;

									        }

									        return substr($text, 0, -1 * $pad);

									    }

									    function PaddingPKCS7($data) {

									        $block_size = mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_CBC);

									        $padding_char = $block_size - (strlen($data) % $block_size);

									        $data .= str_repeat(chr($padding_char),$padding_char);

									        return $data;

									    }

									}

									$des = new DES3();

									echo $ret = $des->encrypt("来自http://jb51.net的博客") . "\n";

									echo $des->decrypt($ret) . "\n";

java(android)

				?

									import java.io.ByteArrayOutputStream;

									import java.io.IOException;

									import java.io.OutputStream;

									import java.io.UnsupportedEncodingException;

									import java.security.Key; 

									import javax.crypto.Cipher; 

									import javax.crypto.SecretKeyFactory; 

									import javax.crypto.spec.DESedeKeySpec; 

									import javax.crypto.spec.IvParameterSpec; 

									/** 

									 * 3DES加密工具类 

									 */

									public class DES3 { 

									   // 密钥 

									   private final static String secretKey = "my.oschina.net/penngo?#@" ;  

									   // 向量 

									   private final static String iv = "01234567" ; 

									   // 加解密统一使用的编码方式 

									   private final static String encoding = "utf-8" ; 

									   /** 

									   * 3DES加密 

									   * 

									   * @param plainText 普通文本 

									   * @return 

									   * @throws Exception 

									   */

									   public static String encode(String plainText) throws Exception { 

									     Key deskey = null ; 

									     DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes()); 

									     SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" ); 

									     deskey = keyfactory.generateSecret(spec); 

									     Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" ); 

									     IvParameterSpec ips = new IvParameterSpec(iv.getBytes()); 

									     cipher.init(Cipher.ENCRYPT_MODE, deskey, ips); 

									     byte [] encryptData = cipher.doFinal(plainText.getBytes(encoding)); 

									     return Base64.encode(encryptData); 

									   } 

									   /** 

									   * 3DES解密 

									   * 

									   * @param encryptText 加密文本 

									   * @return 

									   * @throws Exception 

									   */

									   public static String decode(String encryptText) throws Exception { 

									     Key deskey = null ; 

									     DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());  

									     SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" ); 

									     deskey = keyfactory.generateSecret(spec); 

									     Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" ); 

									     IvParameterSpec ips = new IvParameterSpec(iv.getBytes()); 

									     cipher.init(Cipher.DECRYPT_MODE, deskey, ips); 

									     byte [] decryptData = cipher.doFinal(Base64.decode(encryptText)); 

									     return new String(decryptData, encoding); 

									   } 

									    public static String padding(String str) {

									        byte[] oldByteArray;

									        try {

									            oldByteArray = str.getBytes("UTF8");

									            int numberToPad = 8 - oldByteArray.length % 8;

									            byte[] newByteArray = new byte[oldByteArray.length + numberToPad];

									            System.arraycopy(oldByteArray, 0, newByteArray, 0,

									                    oldByteArray.length);

									            for (int i = oldByteArray.length; i < newByteArray.length; ++i) {

									                newByteArray[i] = 0;

									            }

									            return new String(newByteArray, "UTF8");

									        } catch (UnsupportedEncodingException e) {

									            System.out.println("Crypter.padding UnsupportedEncodingException");

									        }

									        return null;

									    }

									    /** 

									     * Base64编码工具类 

									     * 

									     */

									    public static class Base64 { 

									       private static final char [] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" .toCharArray(); 

									       public static String encode( byte [] data) { 

									         int start = 0 ; 

									         int len = data.length; 

									         StringBuffer buf = new StringBuffer(data.length * 3 / 2 ); 

									         int end = len - 3 ; 

									         int i = start; 

									         int n = 0 ; 

									         while (i <= end) { 

									           int d = (((( int ) data[i]) & 0x0ff ) << 16 ) | (((( int ) data[i + 1 ]) & 0x0ff ) << 8 ) | ((( int ) data[i + 2 ]) & 0x0ff ); 

									           buf.append(legalChars[(d >> 18 ) & 63 ]); 

									           buf.append(legalChars[(d >> 12 ) & 63 ]); 

									           buf.append(legalChars[(d >> 6 ) & 63 ]); 

									           buf.append(legalChars[d & 63 ]); 

									           i += 3 ; 

									           if (n++ >= 14 ) { 

									             n = 0 ; 

									             buf.append( " " ); 

									           } 

									         } 

									         if (i == start + len - 2 ) { 

									           int d = (((( int ) data[i]) & 0x0ff ) << 16 ) | (((( int ) data[i + 1 ]) & 255 ) << 8 ); 

									           buf.append(legalChars[(d >> 18 ) & 63 ]); 

									           buf.append(legalChars[(d >> 12 ) & 63 ]); 

									           buf.append(legalChars[(d >> 6 ) & 63 ]); 

									           buf.append( "=" ); 

									         } else if (i == start + len - 1 ) { 

									           int d = ((( int ) data[i]) & 0x0ff ) << 16 ; 

									           buf.append(legalChars[(d >> 18 ) & 63 ]); 

									           buf.append(legalChars[(d >> 12 ) & 63 ]); 

									           buf.append( "==" ); 

									         } 

									         return buf.toString(); 

									       } 

									       private static int decode( char c) { 

									         if (c >= 'A' && c <= 'Z' ) 

									           return (( int ) c) - 65 ; 

									         else if (c >= 'a' && c <= 'z' ) 

									           return (( int ) c) - 97 + 26 ; 

									         else if (c >= '0' && c <= '9' ) 

									           return (( int ) c) - 48 + 26 + 26 ; 

									         else

									           switch (c) { 

									           case '+' : 

									             return 62 ; 

									           case '/' : 

									             return 63 ; 

									           case '=' : 

									             return 0 ; 

									           default : 

									             throw new RuntimeException( "unexpected code: " + c); 

									           } 

									       } 

									       /** 

									       * Decodes the given Base64 encoded String to a new byte array. The byte array holding the decoded data is returned. 

									       */

									       public static byte [] decode(String s) { 

									         ByteArrayOutputStream bos = new ByteArrayOutputStream(); 

									         try { 

									           decode(s, bos); 

									         } catch (IOException e) { 

									           throw new RuntimeException(); 

									         } 

									         byte [] decodedBytes = bos.toByteArray(); 

									         try { 

									           bos.close(); 

									           bos = null ; 

									         } catch (IOException ex) { 

									           System.err.println( "Error while decoding BASE64: " + ex.toString()); 

									         } 

									         return decodedBytes; 

									       } 

									       private static void decode(String s, OutputStream os) throws IOException { 

									         int i = 0 ; 

									         int len = s.length(); 

									         while ( true ) { 

									           while (i < len && s.charAt(i) <= ' ' ) 

									             i++; 

									           if (i == len) 

									             break ; 

									           int tri = (decode(s.charAt(i)) << 18 ) + (decode(s.charAt(i + 1 )) << 12 ) + (decode(s.charAt(i + 2 )) << 6 ) + (decode(s.charAt(i + 3 ))); 

									           os.write((tri >> 16 ) & 255 ); 

									           if (s.charAt(i + 2 ) == '=' ) 

									             break ; 

									           os.write((tri >> 8 ) & 255 ); 

									           if (s.charAt(i + 3 ) == '=' ) 

									             break ; 

									           os.write(tri & 255 ); 

									           i += 4 ; 

									         } 

									       } 

									    } 

									   public static void main(String[] args) throws Exception{

									     String plainText = "来自http://jb51.net的博客";

									     String encryptText = DES3.encode(plainText);

									     System.out.println(encryptText);

									     System.out.println(DES3.decode(encryptText));

									   }

									}

Ojbective-C(ios)

				?

									// 

									// DES3Util.h 

									// 

									#import <Foundation/Foundation.h> 

									@interface DES3Util : NSObject { 

									} 

									// 加密方法 

									+ (NSString*)encrypt:(NSString*)plainText; 

									// 解密方法 

									+ (NSString*)decrypt:(NSString*)encryptText; 

									@end

									// 

									// DES3Util.m 

									// 

									#import "DES3Util.h"

									#import <CommonCrypto/CommonCryptor.h> 

									#import "GTMBase64.h"

									#define gkey      @"my.oschina.net/penngo?#@"

									#define gIv       @"01234567"

									@implementation DES3Util 

									// 加密方法 

									+ (NSString*)encrypt:(NSString*)plainText { 

									   NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding]; 

									   size_t plainTextBufferSize = [data length]; 

									   const void *vplainText = (const void *)[data bytes]; 

									   CCCryptorStatus ccStatus; 

									   uint8_t *bufferPtr = NULL; 

									   size_t bufferPtrSize = 0; 

									   size_t movedBytes = 0; 

									   bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1); 

									   bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t)); 

									   memset((void *)bufferPtr, 0x0, bufferPtrSize); 

									   const void *vkey = (const void *) [gkey UTF8String]; 

									   const void *vinitVec = (const void *) [gIv UTF8String]; 

									   ccStatus = CCCrypt(kCCEncrypt, 

									            kCCAlgorithm3DES, 

									            kCCOptionPKCS7Padding, 

									            vkey, 

									            kCCKeySize3DES, 

									            vinitVec, 

									            vplainText, 

									            plainTextBufferSize, 

									            (void *)bufferPtr, 

									            bufferPtrSize, 

									            &movedBytes); 

									   NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes]; 

									   NSString *result = [GTMBase64 stringByEncodingData:myData]; 

									   return result; 

									} 

									// 解密方法 

									+ (NSString*)decrypt:(NSString*)encryptText { 

									   NSData *encryptData = [GTMBase64 decodeData:[encryptText dataUsingEncoding:NSUTF8StringEncoding]]; 

									   size_t plainTextBufferSize = [encryptData length]; 

									   const void *vplainText = [encryptData bytes]; 

									   CCCryptorStatus ccStatus; 

									   uint8_t *bufferPtr = NULL; 

									   size_t bufferPtrSize = 0; 

									   size_t movedBytes = 0; 

									   bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1); 

									   bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t)); 

									   memset((void *)bufferPtr, 0x0, bufferPtrSize);   

									   const void *vkey = (const void *) [gkey UTF8String]; 

									   const void *vinitVec = (const void *) [gIv UTF8String]; 

									   ccStatus = CCCrypt(kCCDecrypt, 

									            kCCAlgorithm3DES, 

									            kCCOptionPKCS7Padding, 

									            vkey, 

									            kCCKeySize3DES, 

									            vinitVec, 

									            vplainText, 

									            plainTextBufferSize, 

									            (void *)bufferPtr, 

									            bufferPtrSize, 

									            &movedBytes); 

									   NSString *result = [[[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtr  

									                 length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] autorelease]; 

									   return result; 

									} 

									@end

									//

									// GTMBase64.h

									//

									// Copyright 2006-2008 Google Inc.

									//

									// 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.

									// David Lee make changes:

									// Remove dependency on GTMDefines.h

									// add some string to string function

									#import <Foundation/Foundation.h>

									// GTMBase64

									//

									/// Helper for handling Base64 and WebSafeBase64 encodings

									//

									/// The webSafe methods use different character set and also the results aren't

									/// always padded to a multiple of 4 characters. This is done so the resulting

									/// data can be used in urls and url query arguments without needing any

									/// encoding. You must use the webSafe* methods together, the data does not

									/// interop with the RFC methods.

									//

									@interface GTMBase64 : NSObject

									//

									// Standard Base64 (RFC) handling

									//

									// encodeData:

									//

									/// Base64 encodes contents of the NSData object.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)encodeData:(NSData *)data;

									// decodeData:

									//

									/// Base64 decodes contents of the NSData object.

									//

									/// Returns:

									///  A new autoreleased NSData with the decoded payload. nil for any error.

									//

									+(NSData *)decodeData:(NSData *)data;

									// encodeBytes:length:

									//

									/// Base64 encodes the data pointed at by |bytes|.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)encodeBytes:(const void *)bytes length:(NSUInteger)length;

									// decodeBytes:length:

									//

									/// Base64 decodes the data pointed at by |bytes|.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)decodeBytes:(const void *)bytes length:(NSUInteger)length;

									// stringByEncodingData:

									//

									/// Base64 encodes contents of the NSData object.

									//

									/// Returns:

									///  A new autoreleased NSString with the encoded payload. nil for any error.

									//

									+(NSString *)stringByEncodingData:(NSData *)data;

									// stringByEncodingBytes:length:

									//

									/// Base64 encodes the data pointed at by |bytes|.

									//

									/// Returns:

									///  A new autoreleased NSString with the encoded payload. nil for any error.

									//

									+(NSString *)stringByEncodingBytes:(const void *)bytes length:(NSUInteger)length;

									// decodeString:

									//

									/// Base64 decodes contents of the NSString.

									//

									/// Returns:

									///  A new autoreleased NSData with the decoded payload. nil for any error.

									//

									+(NSData *)decodeString:(NSString *)string;

									//

									// Modified Base64 encoding so the results can go onto urls.

									//

									// The changes are in the characters generated and also allows the result to

									// not be padded to a multiple of 4.

									// Must use the matching call to encode/decode, won't interop with the

									// RFC versions.

									//

									// webSafeEncodeData:padded:

									//

									/// WebSafe Base64 encodes contents of the NSData object. If |padded| is YES

									/// then padding characters are added so the result length is a multiple of 4.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)webSafeEncodeData:(NSData *)data

									           padded:(BOOL)padded;

									// webSafeDecodeData:

									//

									/// WebSafe Base64 decodes contents of the NSData object.

									//

									/// Returns:

									///  A new autoreleased NSData with the decoded payload. nil for any error.

									//

									+(NSData *)webSafeDecodeData:(NSData *)data;

									// webSafeEncodeBytes:length:padded:

									//

									/// WebSafe Base64 encodes the data pointed at by |bytes|. If |padded| is YES

									/// then padding characters are added so the result length is a multiple of 4.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)webSafeEncodeBytes:(const void *)bytes

									            length:(NSUInteger)length

									            padded:(BOOL)padded;

									// webSafeDecodeBytes:length:

									//

									/// WebSafe Base64 decodes the data pointed at by |bytes|.

									//

									/// Returns:

									///  A new autoreleased NSData with the encoded payload. nil for any error.

									//

									+(NSData *)webSafeDecodeBytes:(const void *)bytes length:(NSUInteger)length;

									// stringByWebSafeEncodingData:padded:

									//

									/// WebSafe Base64 encodes contents of the NSData object. If |padded| is YES

									/// then padding characters are added so the result length is a multiple of 4.

									//

									/// Returns:

									///  A new autoreleased NSString with the encoded payload. nil for any error.

									//

									+(NSString *)stringByWebSafeEncodingData:(NSData *)data

									                 padded:(BOOL)padded;

									// stringByWebSafeEncodingBytes:length:padded:

									//

									/// WebSafe Base64 encodes the data pointed at by |bytes|. If |padded| is YES

									/// then padding characters are added so the result length is a multiple of 4.

									//

									/// Returns:

									///  A new autoreleased NSString with the encoded payload. nil for any error.

									//

									+(NSString *)stringByWebSafeEncodingBytes:(const void *)bytes

									                  length:(NSUInteger)length

									                  padded:(BOOL)padded;

									// webSafeDecodeString:

									//

									/// WebSafe Base64 decodes contents of the NSString.

									//

									/// Returns:

									///  A new autoreleased NSData with the decoded payload. nil for any error.

									//

									+(NSData *)webSafeDecodeString:(NSString *)string;

									// David Lee new added function

									/// Returns:

									// A new autoreleased NSString with Base64 encoded NSString

									+(NSString *)stringByBase64String:(NSString *)base64String;

									// David Lee new added function

									/// Returns:

									// A new autoreleased Base64 encoded NSString with NSString

									+(NSString *)base64StringBystring:(NSString *)string;

									@end

									//

									// GTMBase64.m

									//

									// Copyright 2006-2008 Google Inc.

									//

									// 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.

									// David Lee make changes:

									// Remove dependency on GTMDefines.h

									// add some string to string function

									#import "GTMBase64.h"

									static const char *kBase64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

									static const char *kWebSafeBase64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";

									static const char kBase64PaddingChar = '=';

									static const char kBase64InvalidChar = 99;

									static const char kBase64DecodeChars[] = {

									  // This array was generated by the following code:

									  // #include <sys/time.h>

									  // #include <stdlib.h>

									  // #include <string.h>

									  // main()

									  // {

									  //  static const char Base64[] =

									  //   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

									  //  char *pos;

									  //  int idx, i, j;

									  //  printf("  ");

									  //  for (i = 0; i < 255; i += 8) {

									  //   for (j = i; j < i + 8; j++) {

									  //    pos = strchr(Base64, j);

									  //    if ((pos == NULL) || (j == 0))

									  //     idx = 99;

									  //    else

									  //     idx = pos - Base64;

									  //    if (idx == 99)

									  //     printf(" %2d,   ", idx);

									  //    else

									  //     printf(" %2d/*%c*/,", idx, j);

									  //   }

									  //   printf("\n  ");

									  //  }

									  // }

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   62/*+*/, 99,   99,   99,   63/*/ */,

									  52/*0*/, 53/*1*/, 54/*2*/, 55/*3*/, 56/*4*/, 57/*5*/, 58/*6*/, 59/*7*/,

									  60/*8*/, 61/*9*/, 99,   99,   99,   99,   99,   99,

									  99,    0/*A*/, 1/*B*/, 2/*C*/, 3/*D*/, 4/*E*/, 5/*F*/, 6/*G*/,

									  7/*H*/, 8/*I*/, 9/*J*/, 10/*K*/, 11/*L*/, 12/*M*/, 13/*N*/, 14/*O*/,

									  15/*P*/, 16/*Q*/, 17/*R*/, 18/*S*/, 19/*T*/, 20/*U*/, 21/*V*/, 22/*W*/,

									  23/*X*/, 24/*Y*/, 25/*Z*/, 99,   99,   99,   99,   99,

									  99,   26/*a*/, 27/*b*/, 28/*c*/, 29/*d*/, 30/*e*/, 31/*f*/, 32/*g*/,

									  33/*h*/, 34/*i*/, 35/*j*/, 36/*k*/, 37/*l*/, 38/*m*/, 39/*n*/, 40/*o*/,

									  41/*p*/, 42/*q*/, 43/*r*/, 44/*s*/, 45/*t*/, 46/*u*/, 47/*v*/, 48/*w*/,

									  49/*x*/, 50/*y*/, 51/*z*/, 99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99

									};

									static const char kWebSafeBase64DecodeChars[] = {

									  // This array was generated by the following code:

									  // #include <sys/time.h>

									  // #include <stdlib.h>

									  // #include <string.h>

									  // main()

									  // {

									  //  static const char Base64[] =

									  //   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";

									  //  char *pos;

									  //  int idx, i, j;

									  //  printf("  ");

									  //  for (i = 0; i < 255; i += 8) {

									  //   for (j = i; j < i + 8; j++) {

									  //    pos = strchr(Base64, j);

									  //    if ((pos == NULL) || (j == 0))

									  //     idx = 99;

									  //    else

									  //     idx = pos - Base64;

									  //    if (idx == 99)

									  //     printf(" %2d,   ", idx);

									  //    else

									  //     printf(" %2d/*%c*/,", idx, j);

									  //   }

									  //   printf("\n  ");

									  //  }

									  // }

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   62/*-*/, 99,   99,

									  52/*0*/, 53/*1*/, 54/*2*/, 55/*3*/, 56/*4*/, 57/*5*/, 58/*6*/, 59/*7*/,

									  60/*8*/, 61/*9*/, 99,   99,   99,   99,   99,   99,

									  99,    0/*A*/, 1/*B*/, 2/*C*/, 3/*D*/, 4/*E*/, 5/*F*/, 6/*G*/,

									  7/*H*/, 8/*I*/, 9/*J*/, 10/*K*/, 11/*L*/, 12/*M*/, 13/*N*/, 14/*O*/,

									  15/*P*/, 16/*Q*/, 17/*R*/, 18/*S*/, 19/*T*/, 20/*U*/, 21/*V*/, 22/*W*/,

									  23/*X*/, 24/*Y*/, 25/*Z*/, 99,   99,   99,   99,   63/*_*/,

									  99,   26/*a*/, 27/*b*/, 28/*c*/, 29/*d*/, 30/*e*/, 31/*f*/, 32/*g*/,

									  33/*h*/, 34/*i*/, 35/*j*/, 36/*k*/, 37/*l*/, 38/*m*/, 39/*n*/, 40/*o*/,

									  41/*p*/, 42/*q*/, 43/*r*/, 44/*s*/, 45/*t*/, 46/*u*/, 47/*v*/, 48/*w*/,

									  49/*x*/, 50/*y*/, 51/*z*/, 99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99,

									  99,   99,   99,   99,   99,   99,   99,   99

									};

									// Tests a character to see if it's a whitespace character.

									//

									// Returns:

									//  YES if the character is a whitespace character.

									//  NO if the character is not a whitespace character.

									//

									BOOL IsSpace(unsigned char c) {

									  // we use our own mapping here because we don't want anything w/ locale

									  // support.

									  static BOOL kSpaces[256] = {

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // 0-9

									    1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 10-19

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20-29

									    0, 0, 1, 0, 0, 0, 0, 0, 0, 0, // 30-39

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 40-49

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 50-59

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60-69

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 70-79

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80-89

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 90-99

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 100-109

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 110-119

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 120-129

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 130-139

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 140-149

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 150-159

									    1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 160-169

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 170-179

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 180-189

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 190-199

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 200-209

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 210-219

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 220-229

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 230-239

									    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 240-249

									    0, 0, 0, 0, 0, 1,       // 250-255

									  };

									  return kSpaces[c];

									}

									// Calculate how long the data will be once it's base64 encoded.

									//

									// Returns:

									//  The guessed encoded length for a source length

									//

									NSUInteger CalcEncodedLength(NSUInteger srcLen, BOOL padded) {

									  NSUInteger intermediate_result = 8 * srcLen + 5;

									  NSUInteger len = intermediate_result / 6;

									  if (padded) {

									    len = ((len + 3) / 4) * 4;

									  }

									  return len;

									}

									// Tries to calculate how long the data will be once it's base64 decoded.

									// Unlike the above, this is always an upperbound, since the source data

									// could have spaces and might end with the padding characters on them.

									//

									// Returns:

									//  The guessed decoded length for a source length

									//

									NSUInteger GuessDecodedLength(NSUInteger srcLen) {

									  return (srcLen + 3) / 4 * 3;

									}

									@interface GTMBase64 (PrivateMethods)

									+(NSData *)baseEncode:(const void *)bytes

									        length:(NSUInteger)length

									       charset:(const char *)charset

									        padded:(BOOL)padded;

									+(NSData *)baseDecode:(const void *)bytes

									        length:(NSUInteger)length

									       charset:(const char*)charset

									    requirePadding:(BOOL)requirePadding;

									+(NSUInteger)baseEncode:(const char *)srcBytes

									         srcLen:(NSUInteger)srcLen

									       destBytes:(char *)destBytes

									        destLen:(NSUInteger)destLen

									        charset:(const char *)charset

									         padded:(BOOL)padded;

									+(NSUInteger)baseDecode:(const char *)srcBytes

									         srcLen:(NSUInteger)srcLen

									       destBytes:(char *)destBytes

									        destLen:(NSUInteger)destLen

									        charset:(const char *)charset

									     requirePadding:(BOOL)requirePadding;

									@end

									@implementation GTMBase64

									//

									// Standard Base64 (RFC) handling

									//

									+(NSData *)encodeData:(NSData *)data {

									  return [self baseEncode:[data bytes]

									           length:[data length]

									          charset:kBase64EncodeChars

									           padded:YES];

									}

									+(NSData *)decodeData:(NSData *)data {

									  return [self baseDecode:[data bytes]

									           length:[data length]

									          charset:kBase64DecodeChars

									       requirePadding:YES];

									}

									+(NSData *)encodeBytes:(const void *)bytes length:(NSUInteger)length {

									  return [self baseEncode:bytes

									           length:length

									          charset:kBase64EncodeChars

									           padded:YES];

									}

									+(NSData *)decodeBytes:(const void *)bytes length:(NSUInteger)length {

									  return [self baseDecode:bytes

									           length:length

									          charset:kBase64DecodeChars

									       requirePadding:YES];

									}

									+(NSString *)stringByEncodingData:(NSData *)data {

									  NSString *result = nil;

									  NSData *converted = [self baseEncode:[data bytes]

									                 length:[data length]

									                 charset:kBase64EncodeChars

									                 padded:YES];

									  if (converted) {

									    result = [[[NSString alloc] initWithData:converted

									                    encoding:NSASCIIStringEncoding] autorelease];

									  }

									  return result;

									}

									+(NSString *)stringByEncodingBytes:(const void *)bytes length:(NSUInteger)length {

									  NSString *result = nil;

									  NSData *converted = [self baseEncode:bytes

									                 length:length

									                 charset:kBase64EncodeChars

									                 padded:YES];

									  if (converted) {

									    result = [[[NSString alloc] initWithData:converted

									                    encoding:NSASCIIStringEncoding] autorelease];

									  }

									  return result;

									}

									+(NSData *)decodeString:(NSString *)string {

									  NSData *result = nil;

									  NSData *data = [string dataUsingEncoding:NSASCIIStringEncoding];

									  if (data) {

									    result = [self baseDecode:[data bytes]

									              length:[data length]

									             charset:kBase64DecodeChars

									          requirePadding:YES];

									  }

									  return result;

									}

									//

									// Modified Base64 encoding so the results can go onto urls.

									//

									// The changes are in the characters generated and also the result isn't

									// padded to a multiple of 4.

									// Must use the matching call to encode/decode, won't interop with the

									// RFC versions.

									//

									+(NSData *)webSafeEncodeData:(NSData *)data

									           padded:(BOOL)padded {

									  return [self baseEncode:[data bytes]

									           length:[data length]

									          charset:kWebSafeBase64EncodeChars

									           padded:padded];

									}

									+(NSData *)webSafeDecodeData:(NSData *)data {

									  return [self baseDecode:[data bytes]

									           length:[data length]

									          charset:kWebSafeBase64DecodeChars

									       requirePadding:NO];

									}

									+(NSData *)webSafeEncodeBytes:(const void *)bytes

									            length:(NSUInteger)length

									            padded:(BOOL)padded {

									  return [self baseEncode:bytes

									           length:length

									          charset:kWebSafeBase64EncodeChars

									           padded:padded];

									}

									+(NSData *)webSafeDecodeBytes:(const void *)bytes length:(NSUInteger)length {

									  return [self baseDecode:bytes

									           length:length

									          charset:kWebSafeBase64DecodeChars

									       requirePadding:NO];

									}

									+(NSString *)stringByWebSafeEncodingData:(NSData *)data

									                 padded:(BOOL)padded {

									  NSString *result = nil;

									  NSData *converted = [self baseEncode:[data bytes]

									                 length:[data length]

									                 charset:kWebSafeBase64EncodeChars

									                 padded:padded];

									  if (converted) {

									    result = [[[NSString alloc] initWithData:converted

									                    encoding:NSASCIIStringEncoding] autorelease];

									  }

									  return result;

									}

									+(NSString *)stringByWebSafeEncodingBytes:(const void *)bytes

									                  length:(NSUInteger)length

									                  padded:(BOOL)padded {

									  NSString *result = nil;

									  NSData *converted = [self baseEncode:bytes

									                 length:length

									                 charset:kWebSafeBase64EncodeChars

									                 padded:padded];

									  if (converted) {

									    result = [[[NSString alloc] initWithData:converted

									                    encoding:NSASCIIStringEncoding] autorelease];

									  }

									  return result;

									}

									+(NSData *)webSafeDecodeString:(NSString *)string {

									  NSData *result = nil;

									  NSData *data = [string dataUsingEncoding:NSASCIIStringEncoding];

									  if (data) {

									    result = [self baseDecode:[data bytes]

									              length:[data length]

									             charset:kWebSafeBase64DecodeChars

									          requirePadding:NO];

									  }

									  return result;

									}

									// David Lee new added function

									/// Returns:

									// A new autoreleased NSString with Base64 encoded NSString

									+(NSString *)stringByBase64String:(NSString *)base64String

									{

									  NSString *sourceString = [[[NSString alloc] initWithData:[GTMBase64 decodeData:[base64String dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]] encoding:NSUTF8StringEncoding] autorelease];

									  return sourceString;

									}

									// David Lee new added function

									/// Returns:

									// A new autoreleased Base64 encoded NSString with NSString

									+(NSString *)base64StringBystring:(NSString *)string

									{

									  NSString *base64String = [[[NSString alloc] initWithData:[GTMBase64 encodeData:[string dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]] encoding:NSUTF8StringEncoding] autorelease];

									  return base64String;

									}

									@end

									@implementation GTMBase64 (PrivateMethods)

									//

									// baseEncode:length:charset:padded:

									//

									// Does the common lifting of creating the dest NSData. it creates & sizes the

									// data for the results. |charset| is the characters to use for the encoding

									// of the data. |padding| controls if the encoded data should be padded to a

									// multiple of 4.

									//

									// Returns:

									//  an autorelease NSData with the encoded data, nil if any error.

									//

									+(NSData *)baseEncode:(const void *)bytes

									        length:(NSUInteger)length

									       charset:(const char *)charset

									        padded:(BOOL)padded {

									  // how big could it be?

									  NSUInteger maxLength = CalcEncodedLength(length, padded);

									  // make space

									  NSMutableData *result = [NSMutableData data];

									  [result setLength:maxLength];

									  // do it

									  NSUInteger finalLength = [self baseEncode:bytes

									                    srcLen:length

									                  destBytes:[result mutableBytes]

									                   destLen:[result length]

									                   charset:charset

									                    padded:padded];

									  if (finalLength) {

									    NSAssert(finalLength == maxLength, @"how did we calc the length wrong?");

									  } else {

									    // shouldn't happen, this means we ran out of space

									    result = nil;

									  }

									  return result;

									}

									//

									// baseDecode:length:charset:requirePadding:

									//

									// Does the common lifting of creating the dest NSData. it creates & sizes the

									// data for the results. |charset| is the characters to use for the decoding

									// of the data.

									//

									// Returns:

									//  an autorelease NSData with the decoded data, nil if any error.

									//

									//

									+(NSData *)baseDecode:(const void *)bytes

									        length:(NSUInteger)length

									       charset:(const char *)charset

									    requirePadding:(BOOL)requirePadding {

									  // could try to calculate what it will end up as

									  NSUInteger maxLength = GuessDecodedLength(length);

									  // make space

									  NSMutableData *result = [NSMutableData data];

									  [result setLength:maxLength];

									  // do it

									  NSUInteger finalLength = [self baseDecode:bytes

									                    srcLen:length

									                  destBytes:[result mutableBytes]

									                   destLen:[result length]

									                   charset:charset

									                requirePadding:requirePadding];

									  if (finalLength) {

									    if (finalLength != maxLength) {

									      // resize down to how big it was

									      [result setLength:finalLength];

									    }

									  } else {

									    // either an error in the args, or we ran out of space

									    result = nil;

									  }

									  return result;

									}

									//

									// baseEncode:srcLen:destBytes:destLen:charset:padded:

									//

									// Encodes the buffer into the larger. returns the length of the encoded

									// data, or zero for an error.

									// |charset| is the characters to use for the encoding

									// |padded| tells if the result should be padded to a multiple of 4.

									//

									// Returns:

									//  the length of the encoded data. zero if any error.

									//

									+(NSUInteger)baseEncode:(const char *)srcBytes

									         srcLen:(NSUInteger)srcLen

									       destBytes:(char *)destBytes

									        destLen:(NSUInteger)destLen

									        charset:(const char *)charset

									         padded:(BOOL)padded {

									  if (!srcLen || !destLen || !srcBytes || !destBytes) {

									    return 0;

									  }

									  char *curDest = destBytes;

									  const unsigned char *curSrc = (const unsigned char *)(srcBytes);

									  // Three bytes of data encodes to four characters of cyphertext.

									  // So we can pump through three-byte chunks atomically.

									  while (srcLen > 2) {

									    // space?

									    NSAssert(destLen >= 4, @"our calc for encoded length was wrong");

									    curDest[0] = charset[curSrc[0] >> 2];

									    curDest[1] = charset[((curSrc[0] & 0x03) << 4) + (curSrc[1] >> 4)];

									    curDest[2] = charset[((curSrc[1] & 0x0f) << 2) + (curSrc[2] >> 6)];

									    curDest[3] = charset[curSrc[2] & 0x3f];

									    curDest += 4;

									    curSrc += 3;

									    srcLen -= 3;

									    destLen -= 4;

									  }

									  // now deal with the tail (<=2 bytes)

									  switch (srcLen) {

									    case 0:

									      // Nothing left; nothing more to do.

									      break;

									    case 1:

									      // One byte left: this encodes to two characters, and (optionally)

									      // two pad characters to round out the four-character cypherblock.

									      NSAssert(destLen >= 2, @"our calc for encoded length was wrong");

									      curDest[0] = charset[curSrc[0] >> 2];

									      curDest[1] = charset[(curSrc[0] & 0x03) << 4];

									      curDest += 2;

									      destLen -= 2;

									      if (padded) {

									        NSAssert(destLen >= 2, @"our calc for encoded length was wrong");

									        curDest[0] = kBase64PaddingChar;

									        curDest[1] = kBase64PaddingChar;

									        curDest += 2;

									      }

									      break;

									    case 2:

									      // Two bytes left: this encodes to three characters, and (optionally)

									      // one pad character to round out the four-character cypherblock.

									      NSAssert(destLen >= 3, @"our calc for encoded length was wrong");

									      curDest[0] = charset[curSrc[0] >> 2];

									      curDest[1] = charset[((curSrc[0] & 0x03) << 4) + (curSrc[1] >> 4)];

									      curDest[2] = charset[(curSrc[1] & 0x0f) << 2];

									      curDest += 3;

									      destLen -= 3;

									      if (padded) {

									        NSAssert(destLen >= 1, @"our calc for encoded length was wrong");

									        curDest[0] = kBase64PaddingChar;

									        curDest += 1;

									      }

									      break;

									  }

									  // return the length

									  return (curDest - destBytes);

									}

									//

									// baseDecode:srcLen:destBytes:destLen:charset:requirePadding:

									//

									// Decodes the buffer into the larger. returns the length of the decoded

									// data, or zero for an error.

									// |charset| is the character decoding buffer to use

									//

									// Returns:

									//  the length of the encoded data. zero if any error.

									//

									+(NSUInteger)baseDecode:(const char *)srcBytes

									         srcLen:(NSUInteger)srcLen

									       destBytes:(char *)destBytes

									        destLen:(NSUInteger)destLen

									        charset:(const char *)charset

									     requirePadding:(BOOL)requirePadding {

									  if (!srcLen || !destLen || !srcBytes || !destBytes) {

									    return 0;

									  }

									  int decode;

									  NSUInteger destIndex = 0;

									  int state = 0;

									  char ch = 0;

									  while (srcLen-- && (ch = *srcBytes++) != 0) {

									    if (IsSpace(ch)) // Skip whitespace

									      continue;

									    if (ch == kBase64PaddingChar)

									      break;

									    decode = charset[(unsigned int)ch];

									    if (decode == kBase64InvalidChar)

									      return 0;

									    // Four cyphertext characters decode to three bytes.

									    // Therefore we can be in one of four states.

									    switch (state) {

									      case 0:

									        // We're at the beginning of a four-character cyphertext block.

									        // This sets the high six bits of the first byte of the

									        // plaintext block.

									        NSAssert(destIndex < destLen, @"our calc for decoded length was wrong");

									        destBytes[destIndex] = decode << 2;

									        state = 1;

									        break;

									      case 1:

									        // We're one character into a four-character cyphertext block.

									        // This sets the low two bits of the first plaintext byte,

									        // and the high four bits of the second plaintext byte.

									        NSAssert((destIndex+1) < destLen, @"our calc for decoded length was wrong");

									        destBytes[destIndex] |= decode >> 4;

									        destBytes[destIndex+1] = (decode & 0x0f) << 4;

									        destIndex++;

									        state = 2;

									        break;

									      case 2:

									        // We're two characters into a four-character cyphertext block.

									        // This sets the low four bits of the second plaintext

									        // byte, and the high two bits of the third plaintext byte.

									        // However, if this is the end of data, and those two

									        // bits are zero, it could be that those two bits are

									        // leftovers from the encoding of data that had a length

									        // of two mod three.

									        NSAssert((destIndex+1) < destLen, @"our calc for decoded length was wrong");

									        destBytes[destIndex] |= decode >> 2;

									        destBytes[destIndex+1] = (decode & 0x03) << 6;

									        destIndex++;

									        state = 3;

									        break;

									      case 3:

									        // We're at the last character of a four-character cyphertext block.

									        // This sets the low six bits of the third plaintext byte.

									        NSAssert(destIndex < destLen, @"our calc for decoded length was wrong");

									        destBytes[destIndex] |= decode;

									        destIndex++;

									        state = 0;

									        break;

									    }

									  }

									  // We are done decoding Base-64 chars. Let's see if we ended

									  //   on a byte boundary, and/or with erroneous trailing characters.

									  if (ch == kBase64PaddingChar) {        // We got a pad char

									    if ((state == 0) || (state == 1)) {

									      return 0; // Invalid '=' in first or second position

									    }

									    if (srcLen == 0) {

									      if (state == 2) { // We run out of input but we still need another '='

									        return 0;

									      }

									      // Otherwise, we are in state 3 and only need this '='

									    } else {

									      if (state == 2) { // need another '='

									        while ((ch = *srcBytes++) && (srcLen-- > 0)) {

									          if (!IsSpace(ch))

									            break;

									        }

									        if (ch != kBase64PaddingChar) {

									          return 0;

									        }

									      }

									      // state = 1 or 2, check if all remain padding is space

									      while ((ch = *srcBytes++) && (srcLen-- > 0)) {

									        if (!IsSpace(ch)) {

									          return 0;

									        }

									      }

									    }

									  } else {

									    // We ended by seeing the end of the string.

									    if (requirePadding) {

									      // If we require padding, then anything but state 0 is an error.

									      if (state != 0) {

									        return 0;

									      }

									    } else {

									      // Make sure we have no partial bytes lying around. Note that we do not

									      // require trailing '=', so states 2 and 3 are okay too.

									      if (state == 1) {

									        return 0;

									      }

									    }

									  }

									  // If then next piece of output was valid and got written to it means we got a

									  // very carefully crafted input that appeared valid but contains some trailing

									  // bits past the real length, so just toss the thing.

									  if ((destIndex < destLen) &&

									    (destBytes[destIndex] != 0)) {

									    return 0;

									  }

									  return destIndex;

									}

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