internal SignerProvider(SignatureParameters parameters, IKey key) { this.parameters = parameters; if (key is AsymmetricDsaPublicKey) { AsymmetricDsaPublicKey dsaPublicKey = (AsymmetricDsaPublicKey)key; this.sigParams = new DsaPublicKeyParameters(dsaPublicKey.Y, getDomainParams(dsaPublicKey.DomainParameters)); } else { this.sigParams = GetPrivateParameters(key); } }
private static ICipherParameters GetPublicParameters(IKey key) { if (key is KeyWithRandom) { throw new ArgumentException("SecureRandom not required: " + Alg.Name); } AsymmetricDsaPublicKey dsaPublicKey = (AsymmetricDsaPublicKey)key; DsaPublicKeyParameters publicKeyParameters = new DsaPublicKeyParameters(dsaPublicKey.Y, getDomainParams(dsaPublicKey.DomainParameters)); int effSizeInBits = publicKeyParameters.Parameters.P.BitLength; if (CryptoServicesRegistrar.IsInApprovedOnlyMode()) { if (effSizeInBits != 1024 && effSizeInBits != 2048 && effSizeInBits != 3072) { throw new CryptoUnapprovedOperationError("attempt to create verifier with unapproved keysize [" + effSizeInBits + "]", Alg); } } return(publicKeyParameters); }
/// <summary> /// Return a verifier factory that produces verifiers conforming to algorithmDetails. /// </summary> /// <param name="algorithmDetails">The configuration parameters for verifiers produced by the resulting factory.</param> /// <returns>A new verifier factory.</returns> public IVerifierFactory <AlgorithmIdentifier> CreateVerifierFactory(AlgorithmIdentifier algorithmDetails) { AsymmetricRsaPublicKey rsaKey = publicKey as AsymmetricRsaPublicKey; if (rsaKey != null) { IVerifierFactoryService verifierService = CryptoServicesRegistrar.CreateService(rsaKey); if (algorithmDetails.Algorithm.Equals(PkcsObjectIdentifiers.IdRsassaPss)) { FipsRsa.PssSignatureParameters pssParams = FipsRsa.Pss; RsassaPssParameters sigParams = RsassaPssParameters.GetInstance(algorithmDetails.Parameters); pssParams = pssParams.WithDigest((FipsDigestAlgorithm)Utils.digestTable[sigParams.HashAlgorithm.Algorithm]); AlgorithmIdentifier mgfDigAlg = AlgorithmIdentifier.GetInstance(AlgorithmIdentifier.GetInstance(sigParams.MaskGenAlgorithm).Parameters); pssParams = pssParams.WithMgfDigest((FipsDigestAlgorithm)Utils.digestTable[mgfDigAlg.Algorithm]); pssParams = pssParams.WithSaltLength(sigParams.SaltLength.Value.IntValue); return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(pssParams), certificate)); } else if (pkcs1Table.Contains(algorithmDetails.Algorithm)) { FipsRsa.SignatureParameters rsaParams = FipsRsa.Pkcs1v15.WithDigest((FipsDigestAlgorithm)pkcs1Table[algorithmDetails.Algorithm]); return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(rsaParams), certificate)); } } AsymmetricDsaPublicKey dsaKey = publicKey as AsymmetricDsaPublicKey; if (dsaKey != null) { IVerifierFactoryService verifierService = CryptoServicesRegistrar.CreateService(dsaKey); FipsDsa.SignatureParameters sigParams = (FipsDsa.SignatureParameters)dsaTable[algorithmDetails.Algorithm]; return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(sigParams), certificate)); } AsymmetricECPublicKey ecdsaKey = publicKey as AsymmetricECPublicKey; if (ecdsaKey != null) { IVerifierFactoryService verifierService = CryptoServicesRegistrar.CreateService(ecdsaKey); FipsEC.SignatureParameters sigParams = (FipsEC.SignatureParameters)ecdsaTable[algorithmDetails.Algorithm]; return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(sigParams), certificate)); } AsymmetricSphincsPublicKey sphincsKey = publicKey as AsymmetricSphincsPublicKey; if (sphincsKey != null) { IVerifierFactoryService verifierService = CryptoServicesRegistrar.CreateService(sphincsKey); if (algorithmDetails.Algorithm.Equals(BCObjectIdentifiers.sphincs256_with_SHA512)) { return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(Sphincs.Sphincs256), certificate)); } else { return(CreateVerifierFactory(algorithmDetails, verifierService.CreateVerifierFactory(Sphincs.Sphincs256.WithDigest(FipsShs.Sha3_512)), certificate)); } } throw new ArgumentException("cannot match signature algorithm"); }