我正在尝试解密使用RijndaelManaged在C＃中加密的数据 这是.net代码
C＃加密代码： -
private string Encrypt(string textToEncrypt)
{
string key = "BHMACLDBApp";
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(textToEncrypt);
return Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length));
}
C＃解密代码： -
private string Decrypt(string textToDecrypt)
{
string key = "BHMACLDBApp";
RijndaelManaged rijndaelCipher = new RijndaelManaged();
rijndaelCipher.Mode = CipherMode.CBC;
rijndaelCipher.Padding = PaddingMode.PKCS7;
rijndaelCipher.KeySize = 0x80;
rijndaelCipher.BlockSize = 0x80;
byte[] encryptedData = Convert.FromBase64String(textToDecrypt);
byte[] pwdBytes = Encoding.UTF8.GetBytes(key);
byte[] keyBytes = new byte[0x10];
int len = pwdBytes.Length;
if (len > keyBytes.Length)
{
len = keyBytes.Length;
}
Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
byte[] plainText = rijndaelCipher.CreateDecryptor().TransformFinalBlock(encryptedData, 0, encryptedData.Length);
return Encoding.UTF8.GetString(plainText);
}
我已经尝试过这些代码了。但没有成功。
- (NSData *)decrypt:(NSString *)key withData:(NSData*)data{
// '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)
BOOL patchNeeded = ([key length] > kCCKeySizeAES256);
if (patchNeeded) {
key = [key substringToIndex:kCCKeySizeAES256]; // Ensure that the key isn't longer than what's needed (kCCKeySizeAES256)
}
// fetch key data
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
if (patchNeeded) {
keyPtr[0] = '\0'; // Previous iOS version than iOS7 set the first char to '\0' if the key was longer than kCCKeySizeAES256
}
NSUInteger dataLength = [data 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 numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmAES128, kCCOptionPKCS7Padding,
keyPtr, kCCKeySizeAES256,
NULL /* initialization vector (optional) */,
[data bytes], dataLength, /* input */
buffer, bufferSize, /* output */
&numBytesEncrypted);
if (cryptStatus == kCCSuccess) {
//the returned NSData takes ownership of the buffer and will free it on deallocation
return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
}
free(buffer); //free the buffer;
return nil;
}
- (NSData *)AES256DecryptWithKey:(NSString *)key withData:(NSData*)data{
// '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 = [data 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, kCCOptionECBMode,
keyPtr, kCCKeySizeAES256,
NULL /* initialization vector (optional) */,
[data 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;
}
- (NSData *) DecryptAES: (NSString *) key andData:(NSData*)data
{
char keyPtr[kCCKeySizeAES128+1];
bzero( keyPtr, sizeof(keyPtr) );
[key getCString: keyPtr maxLength: sizeof(keyPtr) encoding: NSUTF8StringEncoding];
size_t numBytesEncrypted = 0;
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer_decrypt = malloc(bufferSize);
const unsigned char iv[] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
CCCryptorStatus result = CCCrypt( kCCDecrypt , kCCAlgorithmAES128, kCCOptionECBMode,
keyPtr, kCCKeySizeAES128,
iv,
[data bytes], [data length],
buffer_decrypt, bufferSize,
&numBytesEncrypted );
if( result == kCCSuccess )
return [NSData dataWithBytesNoCopy:buffer_decrypt length:numBytesEncrypted];
return nil;
}
我甚至试过这个但没有成功
- (NSData *)doCipher:(NSData *)dataIn
iv:(NSData *)iv
key:(NSData *)symmetricKey
context:(CCOperation)encryptOrDecrypt
{
CCCryptorStatus ccStatus = kCCSuccess;
size_t cryptBytes = 0; // Number of bytes moved to buffer.
NSMutableData *dataOut = [NSMutableData dataWithLength:dataIn.length + kCCBlockSizeAES128];
ccStatus = CCCrypt( encryptOrDecrypt,
kCCAlgorithmAES128,
kCCOptionECBMode,
symmetricKey.bytes,
kCCKeySizeAES128,
iv.bytes,
dataIn.bytes,
dataIn.length,
dataOut.mutableBytes,
dataOut.length,
&cryptBytes);
if (ccStatus != kCCSuccess) {
NSLog(@"CCCrypt status: %d", ccStatus);
}
dataOut.length = cryptBytes;
return dataOut;
}
如果我保留选项ECB然后我获取数据，但当我将其转换为字符串时，我得到了空。
NSString *base64S=[[NSString alloc] initWithData:decryptedData encoding:NSUTF8StringEncoding];
NSData *decodedData = [[NSData alloc] initWithBase64EncodedString:base64S options:0];
NSString *decodedString64 = [[NSString alloc] initWithData:decodedData encoding:NSUTF8StringEncoding];
NSLog(@"Final Decoded %@", decodedString64);
任何帮助将不胜感激。我在过去的4天里陷入困境。但是没有任何有效的解决方案。
答案 0 :(得分：-2)
NSData *toencrypt = [strString dataUsingEncoding:NSASCIIStringEncoding];
NSData *pass = [[kUserDefaults objectForKey:@"aLoginToken"] dataUsingEncoding:NSASCIIStringEncoding];
NSData *iv = [[kUserDefaults objectForKey:@"aLoginToken"] dataUsingEncoding:NSASCIIStringEncoding];
NSData *bytes = [self dataFromHexString:strRework];
// [[kUserDefaults objectForKey：@“aLoginToken”] dataUsingEncoding：NSUTF16StringEncoding]
CCCryptorStatus status = kCCSuccess;
NSData * encrypted = [[NSData alloc] init];
encrypted = [toencrypt dataEncryptedUsingAlgorithm:kCCAlgorithmAES128 key:pass initializationVector:iv options:kCCOptionPKCS7Padding error:&status];
NSString * strChiperText = [encrypted base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithCarriageReturn ];