private protected PgpKey(KeyPacket keyPacket)
{
this.keyPacket = keyPacket;
this.keyCertifications = new List <PgpCertification>();
this.ids = new List <PgpUser>();
this.fingerprint = CalculateFingerprint();
if (keyPacket.Version <= 3)
{
var rsaParameters = RsaKey.ReadOpenPgpPublicKey(keyPacket.KeyBytes, out var _);
var modulus = rsaParameters.Modulus !;
this.keyId = (long)(((ulong)modulus[modulus.Length - 8] << 56)
| ((ulong)modulus[modulus.Length - 7] << 48)
| ((ulong)modulus[modulus.Length - 6] << 40)
| ((ulong)modulus[modulus.Length - 5] << 32)
| ((ulong)modulus[modulus.Length - 4] << 24)
| ((ulong)modulus[modulus.Length - 3] << 16)
| ((ulong)modulus[modulus.Length - 2] << 8)
| (ulong)modulus[modulus.Length - 1]);
}
else
{
this.keyId = (long)(((ulong)fingerprint[fingerprint.Length - 8] << 56)
| ((ulong)fingerprint[fingerprint.Length - 7] << 48)
| ((ulong)fingerprint[fingerprint.Length - 6] << 40)
| ((ulong)fingerprint[fingerprint.Length - 5] << 32)
| ((ulong)fingerprint[fingerprint.Length - 4] << 24)
| ((ulong)fingerprint[fingerprint.Length - 3] << 16)
| ((ulong)fingerprint[fingerprint.Length - 2] << 8)
| (ulong)fingerprint[fingerprint.Length - 1]);
}
}
private byte[] CalculateFingerprint()
{
HashAlgorithm digest;
if (Version <= 3)
{
var rsaParameters = RsaKey.ReadOpenPgpPublicKey(keyPacket.KeyBytes, out var _);
digest = MD5.Create();
digest.TransformBlock(rsaParameters.Modulus !, 0, rsaParameters.Modulus !.Length, null, 0);
digest.TransformBlock(rsaParameters.Exponent !, 0, rsaParameters.Exponent !.Length, null, 0);
}
else
{
byte[] kBytes = keyPacket.GetEncodedContents();
digest = SHA1.Create();
digest.TransformBlock(new byte[] { 0x99, (byte)(kBytes.Length >> 8), (byte)kBytes.Length }, 0, 3, null, 0);
digest.TransformBlock(kBytes, 0, kBytes.Length, null, 0);
}
digest.TransformFinalBlock(Array.Empty <byte>(), 0, 0);
return(digest.Hash !);
}
