iOS 3DES加密

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mob604756fc3573 2014-12-29 16:26:00

-(NSString*)TripleDES:(NSString*)plainText encryptOrDecrypt:(CCOperation)encryptOrDecrypt encryptOrDecryptKey:(NSString*)encryptOrDecryptKey { constvoid*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 = (constvoid*)[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)); constvoid*vkey = (constvoid*)[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 = [[[NSStringalloc] initWithData:[NSDatadataWithBytes:(constvoid*)bufferPtr length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] autorelease]; } else { NSData*myData = [NSDatadataWithBytes:(constvoid*)bufferPtr length:(NSUInteger)movedBytes]; result = [GTMBase64 stringByEncodingData:myData]; } returnresult; }