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);
}
static void WriteDll(string dllpath, string pempath)
{
//Load public key
StreamReader sr = new StreamReader(pempath);
string keyaspem = sr.ReadToEnd();
sr.Close();
CryptoKey d;
//Is private key
if (keyaspem.IndexOf("-----BEGIN RSA PRIVATE KEY-----") == 0)
{
d = CryptoKey.FromPrivateKey(keyaspem, null);
}
//Is public key
else if (keyaspem.IndexOf("-----BEGIN PUBLIC KEY-----") == 0)
{
d = CryptoKey.FromPublicKey(keyaspem, null);
}
else
{
Console.WriteLine("Key is not vaild.");
return;
}
//Init openssl rsa component.
RSA r = d.GetRSA();
Console.WriteLine("Key File:");
Console.WriteLine(pempath);
Console.WriteLine();
Console.WriteLine("Public Moludus: (reversed)");
byte[] moludus = new byte[256];
r.PublicModulus.ToBytes(moludus);
Array.Reverse(moludus);
Console.WriteLine(BitConverter.ToString(moludus));
Console.WriteLine();
Console.Write("Begin writing \"");
Console.Write(dllpath);
Console.Write("\" at ");
Console.WriteLine("{0:x8}", SIGNATURE_OFFEST); //hex output
Console.WriteLine();
//write game.dll
FileStream fs = new FileStream(dllpath, FileMode.Open, FileAccess.ReadWrite);
fs.Seek(SIGNATURE_OFFEST, SeekOrigin.Begin);
fs.Write(moludus, 0, moludus.Length);
fs.Close();
Console.WriteLine("Writing successful");
Console.WriteLine();
Console.WriteLine("======================");
}
public static byte[] EncryptRSA(string publicKeyAsPem, string payload, string passphrase = null)
{
var encoder = new UTF8Encoding();
byte[] byte_payload = encoder.GetBytes(payload);
CryptoKey d = CryptoKey.FromPublicKey(publicKeyAsPem, passphrase);
OpenSSL.Crypto.RSA rsa = d.GetRSA();
byte[] result = rsa.PublicEncrypt(byte_payload, OpenSSL.Crypto.RSA.Padding.PKCS1);
rsa.Dispose();
return(result);
}
public bool Verify(string publicKeyAsPem, string data, string sign)
{
CryptoKey cryptoKey = CryptoKey.FromPublicKey(publicKeyAsPem, null);
Key ecKey = cryptoKey.GetEC();
var digest = Encoding.ASCII.GetBytes(data);
var ha = System.Security.Cryptography.SHA256Managed.Create();
var hash = ha.ComputeHash(digest);
return(ecKey.Verify(0, hash, Convert.FromBase64String(sign)));
}
/// <summary>
/// 公钥验签
/// </summary>
public static bool Verify(string publicKey, string text, string sign, Encoding encoding)
{
using (BIO bio = new BIO(publicKey))
{
using (CryptoKey cryptoKey = CryptoKey.FromPublicKey(bio, null))
{
using (MessageDigestContext sha256 = new MessageDigestContext(MessageDigest.SHA256))
{
byte[] msgByte = encoding.GetBytes(text);
byte[] signByte = Convert.FromBase64String(sign);
return(sha256.Verify(msgByte, signByte, cryptoKey));
}
}
}
}
//=====================================================
// Verify map signature data with public key
//=====================================================
public static byte[] VerifyData(byte[] BytesToVerify, string keypath)
{
//Load public key
StreamReader sr = new StreamReader(keypath);
string pubkeyaspem = sr.ReadToEnd();
sr.Close();
//Init openssl rsa component.
CryptoKey d = CryptoKey.FromPublicKey(pubkeyaspem, null);
RSA r = d.GetRSA();
byte[] result = r.PublicDecrypt(BytesToVerify, OpenSSL.Crypto.RSA.Padding.None);
r.Dispose();
return(result);
}
private License Decrypt(string payload)
{
CryptoKey cryptoKey = CryptoKey.FromPublicKey("-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqYO2D1DzVA3Q4JXtt0GK\nPKzrA1uu8LKU48f/IRI2vH+I81IwIPGQErDT4SNTjSyLIzYAcJnSUpLbUxj2OhFc\nrSRK/9e7PffJtus9h/ph8Tma5G4e2f7prNxSBTRqiUghB4ZCPJs2NzTA9Q4Rqqe+\n38/2ESGU1G/vOHW71XXKoQkLK8PbU8eRWlCybn5ZElsrCJOlZRdvcmoc/n7IyeBc\n2KJyl3BWhkRLcBDV2YAM1VtU0+jw1aCXltTOoVKFamIqcblYt1a9oJbv4+mPcBnJ\ny4XwuWSTgdfcLu3e1hLPFpBh9aQsxmqPn2OuxQqfggvLeStwazwNCiXJbSgE6XEr\npQIDAQAB\n-----END PUBLIC KEY-----", "2QJmLPD5ktxIrFkr");
RSA rSA = cryptoKey.GetRSA();
byte[] msg = System.Convert.FromBase64String(payload);
byte[] bytes = rSA.PublicDecrypt(msg, RSA.Padding.PKCS1);
string @string = System.Text.Encoding.Default.GetString(bytes);
IRestResponse restResponse = new RestResponse();
restResponse.Content = @string;
JsonDeserializer jsonDeserializer = new JsonDeserializer();
License result = jsonDeserializer.Deserialize <License>(restResponse);
rSA.Dispose();
return(result);
}
