/// <summary>
/// Base constructor.
/// </summary>
/// <param name="algorithm">The name of the signature algorithm to use.</param>
/// <param name="publicKey">The public key to be used in the verification operation.</param>
public Asn1VerifierFactory(String algorithm, AsymmetricKeyParameter publicKey)
{
DerObjectIdentifier sigOid = X509Utilities.GetAlgorithmOid(algorithm);
this.publicKey = publicKey;
this.algID = X509Utilities.GetSigAlgID(sigOid, algorithm);
}
public IStreamCalculator CreateCalculator()
{
ISigner sig = SignerUtilities.GetSigner(X509Utilities.GetSignatureName(algID));
sig.Init(false, publicKey);
return(new VerifierCalculator(sig));
}
/// <summary>
/// Constructor which also specifies a source of randomness to be used if one is required.
/// </summary>
/// <param name="algorithm">The name of the signature algorithm to use.</param>
/// <param name="privateKey">The private key to be used in the signing operation.</param>
/// <param name="random">The source of randomness to be used in signature calculation.</param>
public Asn1SignatureFactory(string algorithm, AsymmetricKeyParameter privateKey, SecureRandom random)
{
DerObjectIdentifier sigOid = X509Utilities.GetAlgorithmOid(algorithm);
this.algorithm = algorithm;
this.privateKey = privateKey;
this.random = random;
this.algID = X509Utilities.GetSigAlgID(sigOid, algorithm);
}