public override void AddSessionInfo(
byte[] si,
SecureRandom random)
{
IBufferedCipher c;
switch (pubKey.Algorithm)
{
case PublicKeyAlgorithmTag.RsaEncrypt:
case PublicKeyAlgorithmTag.RsaGeneral:
c = CipherUtilities.GetCipher("RSA//PKCS1Padding");
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt:
case PublicKeyAlgorithmTag.ElGamalGeneral:
c = CipherUtilities.GetCipher("ElGamal/ECB/PKCS1Padding");
break;
case PublicKeyAlgorithmTag.Dsa:
throw new PgpException("Can't use DSA for encryption.");
case PublicKeyAlgorithmTag.ECDsa:
throw new PgpException("Can't use ECDSA for encryption.");
default:
throw new PgpException("unknown asymmetric algorithm: " + pubKey.Algorithm);
}
AsymmetricKeyParameter akp = pubKey.GetKey();
c.Init(true, new ParametersWithRandom(akp, random));
byte[] encKey = c.DoFinal(si);
switch (pubKey.Algorithm)
{
case PublicKeyAlgorithmTag.RsaEncrypt:
case PublicKeyAlgorithmTag.RsaGeneral:
data = new BigInteger[] { new BigInteger(1, encKey) };
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt:
case PublicKeyAlgorithmTag.ElGamalGeneral:
int halfLength = encKey.Length / 2;
data = new BigInteger[]
{
new BigInteger(1, encKey, 0, halfLength),
new BigInteger(1, encKey, halfLength, halfLength)
};
break;
default:
throw new PgpException("unknown asymmetric algorithm: " + encAlgorithm);
}
}
public void InitVerify(
PgpPublicKey pubKey)
{
lastb = 0;
if (sig == null)
{
GetSig();
}
try
{
sig.Init(false, pubKey.GetKey());
}
catch (InvalidKeyException e)
{
throw new PgpException("invalid key.", e);
}
}
/// <summary>Initialise the signature object for verification.</summary>
public void InitVerify(
PgpPublicKey pubKey)
{
lastb = 0;
try
{
sig = SignerUtilities.GetSigner(
PgpUtilities.GetSignatureName(sigPack.KeyAlgorithm, sigPack.HashAlgorithm));
}
catch (Exception e)
{
throw new PgpException("can't set up signature object.", e);
}
try
{
sig.Init(false, pubKey.GetKey());
}
catch (InvalidKeyException e)
{
throw new PgpException("invalid key.", e);
}
}
/// <summary>Initialise the signature object for verification.</summary>
public void InitVerify(
PgpPublicKey pubKey)
{
lastb = 0;
try
{
sig = SignerUtilities.GetSigner(
PgpUtilities.GetSignatureName(sigPack.KeyAlgorithm, sigPack.HashAlgorithm));
}
catch (Exception e)
{
throw new PgpException("can't set up signature object.", e);
}
try
{
sig.Init(false, pubKey.GetKey());
}
catch (InvalidKeyException e)
{
throw new PgpException("invalid key.", e);
}
}
public void InitVerify(
PgpPublicKey pubKey)
{
lastb = 0;
if (sig == null)
{
GetSig();
}
try
{
sig.Init(false, pubKey.GetKey());
}
catch (InvalidKeyException e)
{
throw new PgpException("invalid key.", e);
}
}
