对称加密算法 3des 在iOS 客户端加密算法

首先进入头文件：

#import

#import

#import

-(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;

}

上面还有个DESKEY宏定义是

#define kChosenDigestLengthCC_SHA1_DIGEST_LENGTH

#define DESKEY @"D6D2402F1C98E208FF2E863AA29334BD65AE1932A821502D9E5673CDE3C713ACFE53E2103CD40ED6BEBB101B484CAE83D537806C6CB611AEE86ED2CA8C97BBE95CF8476066D419E8E833376B850172107844D394016715B2E47E0A6EECB3E83A361FA75FA44693F90D38C6F62029FCD8EA395ED868F9D718293E9C0E63194E87"

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);

} 亲自测试方法都ok！