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 = 0;
    size_t movedBytes = 0;
    
    bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
    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);
}