使用OpenSSL解密RSA.使用现有键.NET

本文关键字：NET OpenSSL 解密 RSA 使用 | 更新日期: 2023-09-27 18:07:02

我有下面的代码来使用OpenSSL.Net生成OpenSSL RSA公钥和私钥。然而，我似乎找不到用给定私钥解密数据的方法。我知道如果我调用生成密钥，然后调用相应的方法来加密和解密数据，它会很好地工作。但是，如果我试图从给定公钥的外部源解密某些内容，我如何使用该密钥进行解密?

注意:请不要给出不使用OpenSSL.NET的示例。Microsoft Cryptographic提供程序比OpenSSL慢得多，不能满足我的速度要求。

谢谢!

public class AsymmetricKeyResult
{
    public string PublicKey { get; set; }
    public string PrivateKey { get; set; }
    public AsymmetricKeyResult(string publicKey, string privateKey)
    {
        this.PublicKey = publicKey;
        this.PrivateKey = privateKey;
    }
}
public static AsymmetricKeyResult GenerateAsymmetricKeys(int keyLength)
{
    RSA rsa = new RSA();
    rsa.GenerateKeys(keyLength, 0x10021, null, null);
    AsymmetricKeyResult kResult = new AsymmetricKeyResult(rsa.PublicKeyAsPEM, rsa.PrivateKeyAsPEM);
    return kResult;
}

使用OpenSSL解密RSA.使用现有键.NET

我最终通过OpenSSL.NET托管包装器上的对象浏览器解决了这个问题。如此:

    public static byte[] AsymmetricEncrypt(string publicKeyAsPem, byte[] payload)
    {
        CryptoKey d = CryptoKey.FromPublicKey(publicKeyAsPem, null);
        RSA rsa = d.GetRSA();
        byte[] result = rsa.PublicEncrypt(payload, RSA.Padding.PKCS1);
        rsa.Dispose();
        return result;
    }
    public static byte[] AsymmetricDecrypt(string privateKeyAsPem, byte[] payload)
    {
        CryptoKey d = CryptoKey.FromPrivateKey(privateKeyAsPem, null);
        RSA rsa = d.GetRSA();
        byte[] result = rsa.PrivateDecrypt(payload, RSA.Padding.PKCS1);
        rsa.Dispose();
        return result;
    }

我发现了这个，并认为这是我祈祷的答案。但是使用openssl (1.0.0e Mac os x)生成pub/private key，我无法从加密文本中再次获得明文-是否有GetBytes/Baseencode类型步骤我缺失?你遇到过这个吗?

编辑:不久我就发布了，然后遇到了一个使用UTF8编码而不是ASCII的不同示例，这是有效的!

本

namespace testopenssl2
{
class Program
{
    public static byte[] AsymmetricEncrypt(string publicKeyAsPem, byte[] payload)
    {
        CryptoKey d = CryptoKey.FromPublicKey(publicKeyAsPem, null);
        RSA rsa = d.GetRSA();
        byte[] result = rsa.PublicEncrypt(payload, RSA.Padding.PKCS1);
        rsa.Dispose();
        return result;
    }
    public static byte[] AsymmetricDecrypt(string privateKeyAsPem, byte[] payload)
    {
        //CryptoKey d = CryptoKey.FromPrivateKey(privateKeyAsPem, null);
        CryptoKey d = CryptoKey.FromPrivateKey(privateKeyAsPem, "pass");
        RSA rsa = d.GetRSA();
        byte[] result = rsa.PrivateDecrypt(payload, RSA.Padding.PKCS1);
        rsa.Dispose();
        return result;
    }
    static void Main(string[] args)
    {
        String t = @"-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbhcU+fhYmYLESZQAj1hKBXsNY
si0kYHNkxpP7ftxZiTFowWUVXHzQgkcYiCNnp3pt1eG6Vt0WDzyFYXqUUqugvX41
gkaIrKQw/sRiWEx49krcz7Vxr3dufL6Mg3eK7NyWDGsqwFrx/qVNqdhsHg12PGNx
IMY4UBtxin2A8pd4OwIDAQAB
-----END PUBLIC KEY-----";
        String p = @"-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,0A128C2617BD2EB1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-----END RSA PRIVATE KEY-----";
        System.Text.Encoding enc = System.Text.Encoding.ASCII;
        String s = "hello";
        byte[] payload = enc.GetBytes(s);
        Console.WriteLine("s: {0}", s);
        byte[] byte_encData = AsymmetricEncrypt(t,payload);
        String res;
        res = Convert.ToBase64String(byte_encData);
        Console.WriteLine("encypted: {0}", res);
        byte[] byte_decrypted = AsymmetricDecrypt(p, byte_encData);
        String res_unenc;
        res_unenc = Convert.ToBase64String(byte_decrypted);
        // works!
        Console.WriteLine("decrypted: {0}", res_unenc);
    }
    }
}
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