解密AES128加密的数据

Question

我想解密过去几天的数据。我解密数据，但结果与原始数据不一样。请，任何人都可以建议我如何做到这一点。我试图解密以下数据：

加密数据： “Mmb9tEkmW82oFPJb3vNhHA ==”

加密密钥： “91860F52E5C3A09BA3B827F28070E08D”

原始数据： “马可”

请帮助。 感谢

Answer 1

这是我如何使用AES128

- (NSData *)cipherData:(NSData *)data { 
    return [self aesOperation:kCCEncrypt OnData:data]; 
} 

- (NSData *)decipherData:(NSData *)data { 
    return [self aesOperation:kCCDecrypt OnData:data]; 
} 


- (NSData *)aesOperation:(CCOperation)op OnData:(NSData *)data { 
    NSData *outData = nil; 

    // Data in parameters 
    const void *key = cipherKey.bytes; 
    const void *dataIn = data.bytes; 
    size_t dataInLength = data.length; 
    // Data out parameters 
    size_t outMoved = 0; 

    // Init out buffer 
    unsigned char outBuffer[BUFFER_SIZE]; 
    memset(outBuffer, 0, BUFFER_SIZE); 
    CCCryptorStatus status = -1; 

    status = CCCrypt(op, kCCAlgorithmAES128, kCCOptionPKCS7Padding, key, kCCKeySizeAES256, NULL, 
       dataIn, dataInLength, &outBuffer, BUFFER_SIZE, &outMoved); 

    if(status == kCCSuccess) { 
     outData = [NSData dataWithBytes:outBuffer length:outMoved]; 
    } else if(status == kCCBufferTooSmall) { 
     // Resize the out buffer 
     size_t newsSize = outMoved; 
     void *dynOutBuffer = malloc(newsSize); 
     memset(dynOutBuffer, 0, newsSize); 
     outMoved = 0; 

     status = CCCrypt(op, kCCAlgorithmAES128, kCCOptionPKCS7Padding, key, kCCKeySizeAES256, NULL, 
        dataIn, dataInLength, &outBuffer, BUFFER_SIZE, &outMoved); 

    if(status == kCCSuccess) { 
     outData = [NSData dataWithBytes:outBuffer length:outMoved]; 
    } 
} 

return outData; 
}