我一直在解密一段時間,不能讓它工作。當我使用加密下面的代碼:地穴狀態不等於kCCSuccess
private static string Decrypt(string plainText, string completeEncodedKey, int keySize)
{
RijndealManaged aesEncryption = new RijndealManaged();
aesEncryption.KeySize = keySize; //keySize is 256
aesEncryption.BlockSize = 128;
aesEncryption.Mode = CipherMode.CBC;
aesEncryption.Padding = PaddingMode.PKCS7;
aesEncryption.IV = Convert.FromBase64String(ASCIIEncoding.ACSII.GetString(Convert.FromBase64String(completeEncodedString)).Split(',')[0]);
aesEncryption.Key = Convert.FromBase64String(ASCIIEncoding.ACSII.GetString(Convert.FromBase64String(completeEncodedString)).Split(',')[1]);
byte[] plainText = Encoding.UTF8.GetBytes(plainStr);
ICryptoTransform crypto = aesEncryption.CreateEncryptor();
byte[] cipherText = crypto.TransformFinalBlock(plainText, 0, plainText.Length);
return Convert.ToBase64String(cipherText);
}
傳遞名爲「安東尼」的明文我得到uRO2DBKAhFsOed/p10dz+w==
,我使用解密
-(NSData *)AES256DecryptWithKey:(NSString *)key{
// 'key' should be 32 bytes for AES256, will be null-padded otherwise
char keyPtr[kCCKeySizeAES256+1]; // room for terminator (unused)
bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
// fetch key data
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [self length];
//See the doc: For block ciphers, the output size will always be less than or
//equal to the input size plus the size of one block.
//That's why we need to add the size of one block here
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesDecrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128,kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES256,
NULL/* initialization vector (optional) */,
[self bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesDecrypted);
if(cryptStatus == kCCSuccess){
//the returned NSData takes ownership of the buffer and will free it on deallocation
return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
}
free(buffer); //free the buffer
return nil;
}
但我得到什麼回報。代碼到達if(cryptStatus == kCCSuccess){
行,它不會進入if語句。所以解密返回nil
。
任何有關爲什麼這不起作用的幫助將是偉大的。謝謝。
如果刪除if語句會發生什麼? – Dustin
什麼都沒有。即使我刪除了if語句,也沒有任何東西出現。 @Dustin Rowland – BigT
然後檢查你的緩衝區 – Dustin