Question

我必须为Web服务签名。该服务使用OpenSSL MD5签名。我从PEM私钥文件生成OpenSSL：

openssl.exe dgst -md5 -hex -out signature.txt -sign privKey.pem textToSign.txt

生成以下签名：

7078388bd081d4b805feb020ab47352320919e4638e36b59d66a684c9bb12a745aaf172e4da2686c3e3750bf627c980a19700f6d8bbd0b62d8714a965a34be2e9f4147ac054c4af1050cdcebd9b475f0ef28e520681b0d67104b8e633ee592bb3ec2c517fb8cf7b13bd86424f00c89518e063d55e7922adab7cf607c85920862

我想在我的代码中实现这一点。我的实际代码看起来像（pfx文件中的私钥与pem文件中的私钥相同）：

private static string Sign(string stringToSign)
{
    X509Certificate2 cert = new X509Certificate2("keys.pfx", "", X509KeyStorageFlags.Exportable);
    byte[] data = Encoding.UTF8.GetBytes(stringToSign);
    byte[] signedData;
    using (MD5 hasher = MD5.Create())
    using (RSACryptoServiceProvider rsa = (RSACryptoServiceProvider)cert.PrivateKey)
    {
        signedData = rsa.SignData(data, hasher);
    }
    return Convert.ToBase64String(signedData);
}

此代码生成以下签名......

cHg4i9CB1LgF/rAgq0c1IyCRnkY442tZ1mpoTJuxKnRarxcuTaJobD43UL9ifJgKGXAPbYu9C2LYcUqWWjS+Lp9BR6wFTErxBQzc69m0dfDvKOUgaBsNZxBLjmM+5ZK7PsLFF/uM97E72GQk8AyJUY4GPVXnkirat89gfIWSCGI=

...与OpenSLL不匹配。我应该怎么做才能匹配OpenSSL？我也尝试使用OpenSSL.NET，但我没有找到任何资源/ tutoral进行签名。

解决

正确的代码是：

    private static string Sign(string stringToSign)
    {
        X509Certificate2 cert = new X509Certificate2("#02299991.pfx", "#02299991", X509KeyStorageFlags.Exportable);
        byte[] data = Encoding.UTF8.GetBytes(stringToSign);
        byte[] signedData;
        using (MD5 hasher = MD5.Create())
        using (RSACryptoServiceProvider rsa = (RSACryptoServiceProvider)cert.PrivateKey)
        {
            signedData = rsa.SignData(data, hasher);
        }
        return ByteArrayToString(signedData); //Convert.ToBase64String(signedData);
    }

    public static string ByteArrayToString(byte[] signedBytes)
    {
        StringBuilder hex = new StringBuilder(signedBytes.Length * 2);
        foreach (byte b in signedBytes)
            hex.AppendFormat("{0:x2}", b);
        return hex.ToString();
    }

Answer 1

您的OpenSSL输出是 hex 字符串：

openssl.exe dgst -md5 -hex -out signature.txt -sign privKey.pem textToSign.txt
                       ^

当您的C＃输出在Base64中时：

return Convert.ToBase64String(signedData);
               ^

将byte[]输出转换为十六进制字符串：

How do you convert Byte Array to Hexadecimal String, and vice versa?

.NET MD5签名与OpenSSL MD5签名不匹配

1 个答案: