有人可以帮助将下面的 iOS 代码生成的 base64 字符串解密为它的 C# 等效字符串。
我试图在 C# 中以“晚上 8 点在 secret 地点见我”结束。
iOS 生成了以下加密:qd+SGaij5KSBScuLs3TpJS/3Dew8fHTudcs/5MG7Q1kqcrZzZycMgTcQuEEEEED5f
此 iOS 代码成功地根据 XCode 6 中的要求加密和解密数据。
预先感谢您的帮助和支持。
达伦
#import <CommonCrypto/CommonCryptor.h>
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *sData = @"Meet me at the secret location at 8pm";
NSString *sIv = @"4QesEr03HwE5H1C+ICw7SA==";
NSString *sKey = @"ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=";
NSData *dData = [sData dataUsingEncoding:NSUTF8StringEncoding];
NSData *dIv = [sIv dataUsingEncoding:NSUTF8StringEncoding];
NSData *dKey = [sKey dataUsingEncoding:NSUTF8StringEncoding];
NSData *dEncrypt = [self doCipher:dData iv:dIv key:dKey context:kCCEncrypt];
NSData *dDecrypt = [self doCipher:dEncrypt iv:dIv key:dKey context:kCCDecrypt];
NSString *sDecrypt = [[NSString alloc] initWithData:dDecrypt encoding:NSUTF8StringEncoding];
NSLog(@"Decrypted Data: %@",sDecrypt);
}
- (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,
kCCOptionPKCS7Padding,
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;
NSString *base64 = [dataOut base64EncodedStringWithOptions:0];
NSLog(@"%@",base64);
return dataOut;
}
最佳答案
现在每个平台上的加密文本如下:
X/aopyVDDva/wJ3If/5i73JGjwth9eH45Opxaaswgb8Kx3ynh8BhBTFRrHT0/i3y
这是工作的 C# 代码
注意:从 https://github.com/Pakhee/Cross-platform-AES-encryption 中提取的 C# 代码
namespace CryptoTest
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string iv = "4QesEr03HwE5H1C+ICw7SA=="; // origional iv 128 bits
string key = "ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg="; // origional key 256 bits
string message = "Meet me at the secret location at 8pm";
CryptLib cryptLib = new CryptLib();
string encryptedText = cryptLib.encrypt(message, key, iv);
string originalMessage = cryptLib.decrypt(encryptedText, key, iv);
Debug.WriteLine(originalMessage);
}
}
public class CryptLib
{
UTF8Encoding _enc;
RijndaelManaged _rcipher;
byte[] _key, _pwd, _ivBytes, _iv;
private enum EncryptMode { ENCRYPT, DECRYPT };
public CryptLib()
{
_enc = new UTF8Encoding();
_rcipher = new RijndaelManaged();
_rcipher.Mode = CipherMode.CBC;
_rcipher.Padding = PaddingMode.PKCS7;
_rcipher.KeySize = 256;
_rcipher.BlockSize = 128;
_key = new byte[32];
_iv = new byte[_rcipher.BlockSize / 8]; //128 bit / 8 = 16 bytes
_ivBytes = new byte[16];
}
private String encryptDecrypt(string _inputText, string _encryptionKey, EncryptMode _mode, string _initVector)
{
string _out = "";// output string
_pwd = Encoding.UTF8.GetBytes(_encryptionKey);
_ivBytes = Encoding.UTF8.GetBytes(_initVector);
int len = _pwd.Length;
if (len > _key.Length)
{
len = _key.Length;
}
int ivLenth = _ivBytes.Length;
if (ivLenth > _iv.Length)
{
ivLenth = _iv.Length;
}
Array.Copy(_pwd, _key, len);
Array.Copy(_ivBytes, _iv, ivLenth);
_rcipher.Key = _key;
_rcipher.IV = _iv;
if (_mode.Equals(EncryptMode.ENCRYPT))
{
//encrypt
byte[] plainText = _rcipher.CreateEncryptor().TransformFinalBlock(_enc.GetBytes(_inputText), 0, _inputText.Length);
_out = Convert.ToBase64String(plainText);
}
if (_mode.Equals(EncryptMode.DECRYPT))
{
//decrypt
byte[] plainText = _rcipher.CreateDecryptor().TransformFinalBlock(Convert.FromBase64String(_inputText), 0, Convert.FromBase64String(_inputText).Length);
_out = _enc.GetString(plainText);
}
_rcipher.Dispose();
return _out;// return encrypted/decrypted string
}
public string encrypt(string _plainText, string _key, string _initVector)
{
return encryptDecrypt(_plainText, _key, EncryptMode.ENCRYPT, _initVector);
}
public string decrypt(string _encryptedText, string _key, string _initVector)
{
return encryptDecrypt(_encryptedText, _key, EncryptMode.DECRYPT, _initVector);
}
}
}
这是工作的 iOS 代码
#import <CommonCrypto/CommonCryptor.h>
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *sData = @"Meet me at the secret location at 8pm";
NSString *sIv = @"4QesEr03HwE5H1C+ICw7SA==";
NSString *sKey = @"ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=";
NSData *dData = [sData dataUsingEncoding:NSUTF8StringEncoding];
NSData *dEncrypt = [self doCipher:dData key:sKey iv:sIv context:kCCEncrypt];
NSData *base64 = [dEncrypt base64EncodedDataWithOptions:0];
NSString *sBase64 = [[NSString alloc] initWithData:base64 encoding:NSUTF8StringEncoding];
NSLog(@"Base64 String: %@",sBase64);
NSData *dDecrypt= [self decrypt:dEncrypt key:sKey iv:sIv];
NSString *sDecrypt = [[NSString alloc] initWithData:dDecrypt encoding:NSUTF8StringEncoding];
NSLog(@"Decrypted Data: %@",sDecrypt);
}
- (NSData *)doCipher:(NSData *)plainText
key:(NSString *)key
iv:(NSString *)iv
context:(CCOperation)encryptOrDecrypt
{
NSUInteger dataLength = [plainText length];
size_t buffSize = dataLength + kCCBlockSizeAES128;
void *buff = malloc(buffSize);
size_t numBytesEncrypted = 0;
NSData *dIv = [iv dataUsingEncoding:NSUTF8StringEncoding];
NSData *dKey = [key dataUsingEncoding:NSUTF8StringEncoding];
CCCryptorStatus status = CCCrypt(encryptOrDecrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding,
dKey.bytes, kCCKeySizeAES256,
dIv.bytes,
[plainText bytes], [plainText length],
buff, buffSize,
&numBytesEncrypted);
if (status == kCCSuccess) {
return [NSData dataWithBytesNoCopy:buff length:numBytesEncrypted];
}
free(buff);
return nil;
}
关于c# - 使用由 iOs CCCrypt 函数使用 AES 生成的 C# 解密 base64 字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26242317/