public byte[] EncryptSessionInfo(ReadOnlySpan <byte> sessionInfo)
{
var encryptedSessionInfo = rsa.Encrypt(sessionInfo.ToArray(), RSAEncryptionPadding.Pkcs1);
var mp = new byte[MPInteger.GetMPEncodedLength(encryptedSessionInfo)];
MPInteger.TryWriteInteger(encryptedSessionInfo, mp, out var _);
return(mp);
}
public byte[] CreateSignature(
ReadOnlySpan <byte> rgbHash,
PgpHashAlgorithm hashAlgorithm)
{
var signature = rsa.SignHash(rgbHash.ToArray(), PgpUtilities.GetHashAlgorithmName(hashAlgorithm), RSASignaturePadding.Pkcs1);
var signatureBytes = new byte[MPInteger.GetMPEncodedLength(signature)];
MPInteger.TryWriteInteger(signature, signatureBytes, out var _);
return(signatureBytes);
}
public byte[] CreateSignature(ReadOnlySpan <byte> rgbHash, PgpHashAlgorithm hashAlgorithm)
{
byte[] ieeeSignature = dsa.CreateSignature(rgbHash.ToArray(), DSASignatureFormat.IeeeP1363FixedFieldConcatenation);
var r = ieeeSignature.AsSpan(0, ieeeSignature.Length / 2);
var s = ieeeSignature.AsSpan(ieeeSignature.Length / 2);
byte[] pgpSignature = new byte[MPInteger.GetMPEncodedLength(r) + MPInteger.GetMPEncodedLength(s)];
MPInteger.TryWriteInteger(r, pgpSignature, out int rWritten);
MPInteger.TryWriteInteger(s, pgpSignature.AsSpan(rWritten), out int _);
return(pgpSignature);
}
public byte[] EncryptSessionInfo(ReadOnlySpan <byte> sessionInfo)
{
var encryptedData = elGamal.Encrypt(sessionInfo, RSAEncryptionPadding.Pkcs1);
var g = encryptedData.Slice(0, encryptedData.Length / 2);
var p = encryptedData.Slice(encryptedData.Length / 2);
var mp = new byte[MPInteger.GetMPEncodedLength(g) + MPInteger.GetMPEncodedLength(p)];
MPInteger.TryWriteInteger(g, mp, out var gWritten);
MPInteger.TryWriteInteger(p, mp.AsSpan(gWritten), out var _);
return(mp);
}
