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);
}