Question

我正在尝试将基于java的代码转换为c＃，如下所示;

原始java代码;

String str2 = "5f1fa09364a6ae7e35a090b434f182652ab8dd76:{\"expiration\": 1353759442.0991001, \"channel\": \"dreamhacksc2\", \"user_agent\": \".*"

Mac localMac = Mac.getInstance("HmacSHA1");
localMac.init(new SecretKeySpec("Wd75Yj9sS26Lmhve".getBytes(), localMac.getAlgorithm()));
String str3 = new BigInteger(1, localMac.doFinal(str2.getBytes())).toString(16);
Object[] arrayOfObject2 = new Object[2];
arrayOfObject2[0] = str3;
arrayOfObject2[1] = URLEncoder.encode(str2);
String str4 = String.format("%s:%s", arrayOfObject2);

这是我的基于WinRT的c＃代码

var token="5f1fa09364a6ae7e35a090b434f182652ab8dd76:{\"expiration\": 1353759442.0991001, \"channel\": \"dreamhacksc2\", \"user_agent\": \".*";

var encoding = new System.Text.UTF8Encoding();
var key = encoding.GetBytes("Wd75Yj9sS26Lmhve");
//var key = Convert.FromBase64String("Wd75Yj9sS26Lmhve");

var tokenData = encoding.GetBytes(token);

var result = HmacSha1(key, tokenData);

var hexString = new BigInteger(result).ToString("x");
var urlEncoded = System.Net.WebUtility.UrlEncode(token);

var combined = String.Format("{0}:{1}", hexString, urlEncoded);

和hmacsha1函数，因为我在WinRT上运行;

    public static byte[] HmacSha1(byte[] key, byte[] data)
    {
        var crypt = Windows.Security.Cryptography.Core.MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
        var keyBuffer = Windows.Security.Cryptography.CryptographicBuffer.CreateFromByteArray(key);
        var cryptKey = crypt.CreateKey(keyBuffer);

        var dataBuffer = Windows.Security.Cryptography.CryptographicBuffer.CreateFromByteArray(data);
        var signBuffer = Windows.Security.Cryptography.Core.CryptographicEngine.Sign(cryptKey, dataBuffer);

        byte[] result;
        Windows.Security.Cryptography.CryptographicBuffer.CopyToByteArray(signBuffer, out result);

        return result;
    }

所以这是相应的呐喊;

(JAVA) 92e893efe72a2f7df6ed409ce35819faba191a63:5f1fa09364a6ae7e35a090b434f182652ab8dd76%3A%7B%22expiration%22%3A+1353759442.0991001%2C+%22channel%22%3A+%22dreamhacksc2%22%2C+%22user_agent%22%3A+%22.*
  (C#) 63b10e1d8e9f99cd7fba2ed46fe8e4a4a40222f5:5f1fa09364a6ae7e35a090b434f182652ab8dd76%3A%7B%22expiration%22%3A+1353759442.0991001%2C+%22channel%22%3A+%22dreamhacksc2%22%2C+%22user_agent%22%3A+%22.*

如上所示，来自java和c＃的HMAC_SHA1的输出不相等。有任何想法吗？我运行编码问题了吗？

Answer 1

三个提示：

当我测试你的Java代码时，我收到了str3的这个值：f52202a4a4e4e86fd42eba7fcd999f8e1d0eb163这与你发布的Java和C＃结果不同。（This online tool也会计算我的结果。）
Wikipedia包含example，基于Java代码和在线计算器似乎是正确的。在第一步中，使用"The quick brown fox jumps over the lazy dog", "key", "de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9"三元组测试Java和C＃代码。
使用BigInterger.toString（16）将字节数组转换为十六进制字符串不是一个好主意，因为当字节数组以一个或多个零数字（或hexit？）开头时，转换后的十六进制字符串将不包含前0个字符。

Answer 2

保持简单，代码相同。

爪哇：

public static String toHexString(byte[] bytes) {
    StringBuilder sb = new StringBuilder(bytes.length * 2);
    for (int i = 0; i < bytes.length; ++i) {
        sb.append(String.format("%02x", bytes[i]));
    }
    return sb.toString();
}

public static void main(String[] args) {
    String str2 = "5f1fa09364a6ae7e35a090b434f182652ab8dd76:{\"expiration\": 1353759442.0991001, \"channel\": \"dreamhacksc2\", \"user_agent\": \".*";
    Mac localMac;
    try {
        localMac = Mac.getInstance("HmacSHA1");

        localMac.init(new SecretKeySpec("Wd75Yj9sS26Lmhve"
                .getBytes("UTF-8"), localMac.getAlgorithm()));
        byte[] result = localMac.doFinal(str2.getBytes("UTF-8"));
        String hexString = toHexString(result);
        System.out.println(hexString);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

}

结果：

f52202a4a4e4e86fd42eba7fcd999f8e1d0eb163

C＃：

var token = "5f1fa09364a6ae7e35a090b434f182652ab8dd76:{\"expiration\": 1353759442.0991001, \"channel\": \"dreamhacksc2\", \"user_agent\": \".*";

var encoding = new System.Text.UTF8Encoding();
var privateKey = "Wd75Yj9sS26Lmhve";
HMACSHA1 hmac_sha1 = new HMACSHA1(encoding.GetBytes(privateKey));
hmac_sha1.Initialize();
byte[] result = hmac_sha1.ComputeHash(encoding.GetBytes(token));

string hexString = String.Join( "", result.Select( a => a.ToString("x2") ));

Console.WriteLine(hexString);

结果：

f52202a4a4e4e86fd42eba7fcd999f8e1d0eb163

Answer 3

您将字符串与字符串混淆。 getBytes()的结果取决于默认的character-encoding，它可能因系统而异。

无法获得与java和c＃（winrt）相同的hmac_sha1结果

3 个答案: