public static bool VerifySignature_2048_Bit_PKCS1_v1_5(byte[] data, byte[] signature, byte[] publicKey)
{
// Links for information about PKCS #1 version 1.5:
// RFC 2313: http://tools.ietf.org/html/rfc2313
// PKCS #1 on Wikipedia: http://en.wikipedia.org/wiki/PKCS_1
var hash = CryptoHash.calculate(data, CryptoHash.Kind.SHA1);
// Specify the public key
RSAParameters rsaParameters = GetRsaParameters_2048_Bit_PKCS1_v1_5(publicKey);
// Use RSACryptoProvider to verify the signature with the public key
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(2048);
rsa.ImportParameters(rsaParameters);
RSAPKCS1SignatureDeformatter rsaDeformatter = new RSAPKCS1SignatureDeformatter(rsa);
rsaDeformatter.SetHashAlgorithm("SHA1");
return(rsaDeformatter.VerifySignature(hash.bytes.internalArray(), signature));
}
string sha256(string data) => CryptoHash.calculate(data, CryptoHash.Kind.SHA256).asString();