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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;}
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原文地址：http://www.cnblogs.com/Camier-myNiuer/p/4191935.html
