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