使用使用AES的iOs CCCrypt函数生成的C#解密base64字符串_C#_Ios_Encryption_Aes_Commoncrypto

使用使用AES的iOs CCCrypt函数生成的C#解密base64字符串

c# ios encryption

使用使用AES的iOs CCCrypt函数生成的C#解密base64字符串,c#,ios,encryption,aes,commoncrypto,C#,Ios,Encryption,Aes,Commoncrypto,有人能帮我把下面的iOS代码生成的base64字符串解密成C#等价物吗我试图在c#内以“晚上8点在秘密地点见我”结束 iOS生成了以下加密：qd+SGAIJ5KSBCSCLUS3TPJS/3Dew8fHTudcs/5MG7Q1KQCRZZYCMGTCQUEED5F 此iOS代码根据需要在XCode 6中成功加密和解密数据提前感谢您的帮助和支持达伦 #import <CommonCrypto/CommonCryptor.h> - (void)viewDidLoad {

有人能帮我把下面的iOS代码生成的base64字符串解密成C#等价物吗

我试图在c#内以“晚上8点在秘密地点见我”结束

iOS生成了以下加密：qd+SGAIJ5KSBCSCLUS3TPJS/3Dew8fHTudcs/5MG7Q1KQCRZZYCMGTCQUEED5F

此iOS代码根据需要在XCode 6中成功加密和解密数据

提前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;
}

#导入
-（无效）viewDidLoad{
[超级视图下载]；
//加载视图后，通常从nib执行任何其他设置。
NSString*sData=@“晚上8点在秘密地点见我”；
NSString*sIv=@“4QesEr03HwE5H1C+ICw7SA==”；
NSString*sKey=@“ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=”；
NSData*dData=[sData数据使用编码：NSUTF8StringEncoding]；
NSData*dIv=[sIv数据使用编码：NSUTF8StringEncoding]；
NSData*dKey=[sKey DATAUSINGENCODE: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（@“解密数据：%@”，sDecrypt）；
}
-（NSData*）doCipher:（NSData*）数据输入
四：（NSData*）四
键：（NSData*）symmetricKey
上下文：（cOperation）encryptOrDecrypt
{
CCCryptorStatus ccStatus=KCCSucces；
size\u t cryptBytes=0；//移动到缓冲区的字节数。
NSMutableData*dataOut=[NSMutableData dataWithLength:dataIn.length+kCCBlockSizeAES128]；
ccStatus=CCCrypt（encryptOrDecrypt，
KCcalGorithmae128，
KCCOPIONPKCS7填充，
symmetricKey.bytes，
kCCKeySizeAES128，
iv.字节，
以字节为单位的数据，
dataIn.length，
dataOut.mutableBytes，
dataOut.length，
&密码字节）；
if（ccStatus！=KCCSucces）{
NSLog（@“CCCrypt状态：%d”，ccStatus）；
}
dataOut.length=cryptBytes；
NSString*base64=[dataOut base64EncodedStringWithOptions:0]；
NSLog（@“%@”，base64）；
返回数据输出；
}

给定的base64字符串

qd+SGAIJ5KSBCSCLUS3TPJS/3Dew8fHTudcs/5MG7Q1KQCRZZYCMGTCQUEEED5F

是一个双向包

首先必须对其进行base64解码（即），然后必须使用正确的算法对其进行解密。根据给定的参数，它希望使用AES或Rijndael算法（示例代码），其中必须输入base64解码字节、密钥和IV

之后，你希望得到你想要的数据

所以我自己写了一个例子，我能够用C#对指定的消息进行加密和解密

但检索到的加密消息与iOS生成的消息不同：

您的iOS消息：

qd+SGaij5KSBScuLs3TpJS/3Dew8fHTudcs/5mg7q1kqcrzzyycmggtcqueeed5f

我的C#消息：

wC2dn+QVhOhf+nqzvskoldh2xdadg3smczrkf+tjqsgfxu07behridqkbgy80o

我只是做了一些小改动，再深入一点。我看到的一件事是，您在iOS代码中说密钥的长度为256位。但是您提供的密钥只有128位的长度。在这种情况下，C#似乎只是切换回128位密钥长度（因为更改下面代码中的密钥大小不会更改加密的字节）。但也许iOS中的CCCrypt会有所不同。因此，要么在iOS代码中采用密钥大小，要么提供256位密钥，然后再次比较iOS和C#的结果

例如：

var message = @"Meet me at the secret location at 8pm";
var iv = @"4QesEr03HwE5H1C+ICw7SA==";
var key = @"ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=";

byte[] encryptedBytes;

using (var aesCryptoProvider = new AesCryptoServiceProvider())
{
    aesCryptoProvider.BlockSize = 128;
    aesCryptoProvider.KeySize = 256;
    aesCryptoProvider.IV = Convert.FromBase64String(iv);
    aesCryptoProvider.Key = Convert.FromBase64String(key);
    aesCryptoProvider.Padding = PaddingMode.PKCS7;
    aesCryptoProvider.Mode = CipherMode.CBC;

    using (var encryptor = aesCryptoProvider.CreateEncryptor())
    using (var memoryStream = new MemoryStream())
    using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
    using (var streamWriter = new StreamWriter(cryptoStream, Encoding.UTF8))
    {
        streamWriter.Write(message);
        streamWriter.Close();
        encryptedBytes = memoryStream.ToArray();
    }
}

var encryptedMessage = Convert.ToBase64String(encryptedBytes);
Console.WriteLine(encryptedMessage);

using (var aesCryptoProvider = new AesCryptoServiceProvider())
{
    aesCryptoProvider.BlockSize = 128;
    aesCryptoProvider.KeySize = 256;
    aesCryptoProvider.IV = Convert.FromBase64String(iv);
    aesCryptoProvider.Key = Convert.FromBase64String(key);
    aesCryptoProvider.Padding = PaddingMode.PKCS7;
    aesCryptoProvider.Mode = CipherMode.CBC;

    using (var decryptor = aesCryptoProvider.CreateDecryptor())
    using (var memoryStream = new MemoryStream(Convert.FromBase64String(encryptedMessage)))
    using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
    using (var streamReader = new StreamReader(cryptoStream, Encoding.UTF8))
    {
        Console.WriteLine(streamReader.ReadToEnd());
    }
}

给定的base64字符串

qd+SGAIJ5KSBCSCLUS3TPJS/3Dew8fHTudcs/5MG7Q1KQCRZZYCMGTCQUEEED5F

是一个双向包

之后，你希望得到你想要的数据

所以我自己写了一个例子，我能够用C#对指定的消息进行加密和解密

但检索到的加密消息与iOS生成的消息不同：

您的iOS消息：

qd+SGaij5KSBScuLs3TpJS/3Dew8fHTudcs/5mg7q1kqcrzzyycmggtcqueeed5f

我的C#消息：

wC2dn+QVhOhf+nqzvskoldh2xdadg3smczrkf+tjqsgfxu07behridqkbgy80o

例如：

var message = @"Meet me at the secret location at 8pm";
var iv = @"4QesEr03HwE5H1C+ICw7SA==";
var key = @"ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=";

byte[] encryptedBytes;

using (var aesCryptoProvider = new AesCryptoServiceProvider())
{
    aesCryptoProvider.BlockSize = 128;
    aesCryptoProvider.KeySize = 256;
    aesCryptoProvider.IV = Convert.FromBase64String(iv);
    aesCryptoProvider.Key = Convert.FromBase64String(key);
    aesCryptoProvider.Padding = PaddingMode.PKCS7;
    aesCryptoProvider.Mode = CipherMode.CBC;

    using (var encryptor = aesCryptoProvider.CreateEncryptor())
    using (var memoryStream = new MemoryStream())
    using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
    using (var streamWriter = new StreamWriter(cryptoStream, Encoding.UTF8))
    {
        streamWriter.Write(message);
        streamWriter.Close();
        encryptedBytes = memoryStream.ToArray();
    }
}

var encryptedMessage = Convert.ToBase64String(encryptedBytes);
Console.WriteLine(encryptedMessage);

using (var aesCryptoProvider = new AesCryptoServiceProvider())
{
    aesCryptoProvider.BlockSize = 128;
    aesCryptoProvider.KeySize = 256;
    aesCryptoProvider.IV = Convert.FromBase64String(iv);
    aesCryptoProvider.Key = Convert.FromBase64String(key);
    aesCryptoProvider.Padding = PaddingMode.PKCS7;
    aesCryptoProvider.Mode = CipherMode.CBC;

    using (var decryptor = aesCryptoProvider.CreateDecryptor())
    using (var memoryStream = new MemoryStream(Convert.FromBase64String(encryptedMessage)))
    using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
    using (var streamReader = new StreamReader(cryptoStream, Encoding.UTF8))
    {
        Console.WriteLine(streamReader.ReadToEnd());
    }
}

每个平台上的加密文本现在为：

X/aopyVDDva/wJ3If/5i73JGjwth9eH45Opxaaswgb8Kx3ynh8BhBTFRrHT0/i3y

这是正在工作的C代码

注：C#代码摘自

这是正在运行的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;
    }

#导入
-（无效）viewDidLoad{
[超级视图下载]；
//加载视图后，通常从nib执行任何其他设置。
NSString*sData=@“晚上8点在秘密地点见我”；
NSString*sIv=@“4QesEr03HwE5H1C+ICw7SA==”；
NSString*sKey=@“ovA6siPkyM5Lb9oNcnxLz676K6JK6FrJKk4efEUWBzg=”；
NSData*dData=[sData数据使用编码：NSUTF8StringEncoding]；
NSData*dEncrypt=[self-doCipher:dData-ke