iOS 3DES加密

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

{

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 *)[encryptOrDecryptKey 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;

}

巴特西

iOS 3DES加密

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