iOS 3DES加密 和 java 3DES 解密

首先进入头文件：

#import <CommonCrypto/CommonDigest.h>

#import <CommonCrypto/CommonCryptor.h>

#import <Security/Security.h>

#define kChosenDigestLength     CC_SHA1_DIGEST_LENGTH

#define DESKEY @"D6D2402F1C98E208FF2E863AA29334BD65AE1932A821502D9E5673CDE3C713ACFE53E2103CD40ED6BEBB101B484CAE83D537806C6CB611AEE86ED2CA8C97BBE95CF8476066D419E8E833376B850172107844D394016715B2E47E0A6EECB3E83A361FA75FA44693F90D38C6F62029FCD8EA395ED868F9D718293E9C0E63194E87"

-(NSString*)TripleDES:(NSString*)plainText encryptOrDecrypt:(CCOperation)encryptOrDecrypt

{

    const void *vplainText;

    size_t plainTextBufferSize;

    if (encryptOrDecrypt == kCCDecrypt)//解密

    {

        NSData *EncryptData = [GTMBase64 decodeData:[plainText dataUsingEncoding:NSUTF8StringEncoding]];

        plainTextBufferSize = [EncryptData length];

        vplainText = [EncryptData bytes];

    }

    else //加密

    {

        NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];

        plainTextBufferSize = [data length];

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

    }

    CCCryptorStatus ccStatus;

    uint8_t *bufferPtr = NULL;

    size_t bufferPtrSize = ;

    size_t movedBytes = ;

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

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

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

    // memset((void *) iv, 0x0, (size_t) sizeof(iv));

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

    // NSString *initVec = @"init Vec";

    //const void *vinitVec = (const void *) [initVec UTF8String];

    //  Byte iv[] = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};

    ccStatus = CCCrypt(encryptOrDecrypt,

                       kCCAlgorithm3DES,

                       kCCOptionPKCS7Padding | kCCOptionECBMode,

                       vkey,

                       kCCKeySize3DES,

                       nil,

                       vplainText,

                       plainTextBufferSize,

                       (void *)bufferPtr,

                       bufferPtrSize,

                       &movedBytes);

    //if (ccStatus == kCCSuccess) NSLog(@"SUCCESS");

    /*else if (ccStatus == kCC ParamError) return @"PARAM ERROR";

     else if (ccStatus == kCCBufferTooSmall) return @"BUFFER TOO SMALL";

     else if (ccStatus == kCCMemoryFailure) return @"MEMORY FAILURE";

     else if (ccStatus == kCCAlignmentError) return @"ALIGNMENT";

     else if (ccStatus == kCCDecodeError) return @"DECODE ERROR";

     else if (ccStatus == kCCUnimplemented) return @"UNIMPLEMENTED"; */

    NSString *result;

    if (encryptOrDecrypt == kCCDecrypt)

    {

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

                                                                length:(NSUInteger)movedBytes]

                                        encoding:NSUTF8StringEncoding]

                  autorelease];

    }

    else

    {

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

        result = [GTMBase64 stringByEncodingData:myData];

    }

    return result;

}

java客户端 3DES 解密和加密算法

public static String encryptThreeDESECB(String src,String key) throws Exception

{

    DESedeKeySpec dks = new DESedeKeySpec(key.getBytes("UTF-8"));

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");

    SecretKey securekey = keyFactory.generateSecret(dks);

    Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");

    cipher.init(Cipher.ENCRYPT_MODE, securekey);

    byte[] b=cipher.doFinal(src.getBytes());

    BASE64Encoder encoder = new BASE64Encoder();

    return encoder.encode(b).replaceAll("\r", "").replaceAll("\n", "");

}

//3DESECB解密,key必须是长度大于等于 3*8 = 24 位

public static String decryptThreeDESECB(String src,String key) throws Exception

{

    //--通过base64,将字符串转成byte数组

    BASE64Decoder decoder = new BASE64Decoder();

    byte[] bytesrc = decoder.decodeBuffer(src);

    //--解密的key

    DESedeKeySpec dks = new DESedeKeySpec(key.getBytes("UTF-8"));

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");

    SecretKey securekey = keyFactory.generateSecret(dks);

    //--Chipher对象解密

    Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");

    cipher.init(Cipher.DECRYPT_MODE, securekey);

    byte[] retByte = cipher.doFinal(bytesrc);

    return new String(retByte);

}