using System; using System.Collections.Generic; using Org.BouncyCastle.Asn1; using Org.BouncyCastle.Asn1.Cms; using Org.BouncyCastle.Asn1.CryptoPro; using Org.BouncyCastle.Asn1.Eac; using Org.BouncyCastle.Asn1.Nist; using Org.BouncyCastle.Asn1.Oiw; using Org.BouncyCastle.Asn1.Pkcs; using Org.BouncyCastle.Asn1.Rosstandart; using Org.BouncyCastle.Asn1.TeleTrust; using Org.BouncyCastle.Asn1.X509; using Org.BouncyCastle.Asn1.X9; using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Operators.Utilities; using Org.BouncyCastle.Security; using Org.BouncyCastle.Utilities.Collections; using Org.BouncyCastle.X509; namespace Org.BouncyCastle.Cms { internal static class CmsSignedHelper { private static readonly Dictionary m_encryptionAlgs = new Dictionary(); private static readonly Dictionary m_digestAlgs = new Dictionary(); private static readonly Dictionary m_digestAliases = new Dictionary(); private static readonly HashSet m_noParams = new HashSet(); private static readonly Dictionary m_ecAlgorithms = new Dictionary(); private static void AddEntries(DerObjectIdentifier oid, string digest, string encryption) { m_digestAlgs.Add(oid, digest); m_encryptionAlgs.Add(oid, encryption); } static CmsSignedHelper() { AddEntries(NistObjectIdentifiers.DsaWithSha224, "SHA224", "DSA"); AddEntries(NistObjectIdentifiers.DsaWithSha256, "SHA256", "DSA"); AddEntries(NistObjectIdentifiers.DsaWithSha384, "SHA384", "DSA"); AddEntries(NistObjectIdentifiers.DsaWithSha512, "SHA512", "DSA"); AddEntries(OiwObjectIdentifiers.DsaWithSha1, "SHA1", "DSA"); AddEntries(OiwObjectIdentifiers.MD4WithRsa, "MD4", "RSA"); AddEntries(OiwObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA"); AddEntries(OiwObjectIdentifiers.MD5WithRsa, "MD5", "RSA"); AddEntries(OiwObjectIdentifiers.Sha1WithRsa, "SHA1", "RSA"); AddEntries(PkcsObjectIdentifiers.MD2WithRsaEncryption, "MD2", "RSA"); AddEntries(PkcsObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA"); AddEntries(PkcsObjectIdentifiers.MD5WithRsaEncryption, "MD5", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha1WithRsaEncryption, "SHA1", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha224WithRsaEncryption, "SHA224", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha256WithRsaEncryption, "SHA256", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha384WithRsaEncryption, "SHA384", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha512WithRsaEncryption, "SHA512", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha512_224WithRSAEncryption, "SHA512(224)", "RSA"); AddEntries(PkcsObjectIdentifiers.Sha512_256WithRSAEncryption, "SHA512(256)", "RSA"); AddEntries(NistObjectIdentifiers.IdRsassaPkcs1V15WithSha3_224, "SHA3-224", "RSA"); AddEntries(NistObjectIdentifiers.IdRsassaPkcs1V15WithSha3_256, "SHA3-256", "RSA"); AddEntries(NistObjectIdentifiers.IdRsassaPkcs1V15WithSha3_384, "SHA3-384", "RSA"); AddEntries(NistObjectIdentifiers.IdRsassaPkcs1V15WithSha3_512, "SHA3-512", "RSA"); AddEntries(X9ObjectIdentifiers.ECDsaWithSha1, "SHA1", "ECDSA"); AddEntries(X9ObjectIdentifiers.ECDsaWithSha224, "SHA224", "ECDSA"); AddEntries(X9ObjectIdentifiers.ECDsaWithSha256, "SHA256", "ECDSA"); AddEntries(X9ObjectIdentifiers.ECDsaWithSha384, "SHA384", "ECDSA"); AddEntries(X9ObjectIdentifiers.ECDsaWithSha512, "SHA512", "ECDSA"); AddEntries(X9ObjectIdentifiers.IdDsaWithSha1, "SHA1", "DSA"); AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_1, "SHA1", "ECDSA"); AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_224, "SHA224", "ECDSA"); AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_256, "SHA256", "ECDSA"); AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_384, "SHA384", "ECDSA"); AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_512, "SHA512", "ECDSA"); AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_1, "SHA1", "RSA"); AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_256, "SHA256", "RSA"); AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_1, "SHA1", "RSAandMGF1"); AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_256, "SHA256", "RSAandMGF1"); AddEntries(CryptoProObjectIdentifiers.GostR3411x94WithGostR3410x94, "GOST3411", "GOST3410"); AddEntries(CryptoProObjectIdentifiers.GostR3411x94WithGostR3410x2001, "GOST3411", "ECGOST3410"); AddEntries(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_256, "GOST3411-2012-256", "ECGOST3410"); AddEntries(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_512, "GOST3411-2012-512", "ECGOST3410"); m_encryptionAlgs.Add(X9ObjectIdentifiers.IdDsa, "DSA"); m_encryptionAlgs.Add(PkcsObjectIdentifiers.RsaEncryption, "RSA"); m_encryptionAlgs.Add(TeleTrusTObjectIdentifiers.TeleTrusTRsaSignatureAlgorithm, "RSA"); m_encryptionAlgs.Add(X509ObjectIdentifiers.IdEARsa, "RSA"); m_encryptionAlgs.Add(PkcsObjectIdentifiers.IdRsassaPss, "RSAandMGF1"); m_encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x94, "GOST3410"); m_encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x2001, "ECGOST3410"); m_encryptionAlgs.Add(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256, "ECGOST3410"); m_encryptionAlgs.Add(RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512, "ECGOST3410"); m_encryptionAlgs.Add(new DerObjectIdentifier("1.3.6.1.4.1.5849.1.6.2"), "ECGOST3410"); m_encryptionAlgs.Add(new DerObjectIdentifier("1.3.6.1.4.1.5849.1.1.5"), "GOST3410"); m_encryptionAlgs.Add(X9ObjectIdentifiers.IdECPublicKey, "ECDSA"); m_digestAlgs.Add(PkcsObjectIdentifiers.MD2, "MD2"); m_digestAlgs.Add(PkcsObjectIdentifiers.MD4, "MD4"); m_digestAlgs.Add(PkcsObjectIdentifiers.MD5, "MD5"); m_digestAlgs.Add(OiwObjectIdentifiers.IdSha1, "SHA1"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha224, "SHA224"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha256, "SHA256"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha384, "SHA384"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha512, "SHA512"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha512_224, "SHA512(224)"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha512_256, "SHA512(256)"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha3_224, "SHA3-224"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha3_256, "SHA3-256"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha3_384, "SHA3-384"); m_digestAlgs.Add(NistObjectIdentifiers.IdSha3_512, "SHA3-512"); m_digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD128, "RIPEMD128"); m_digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD160, "RIPEMD160"); m_digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD256, "RIPEMD256"); m_digestAlgs.Add(CryptoProObjectIdentifiers.GostR3411, "GOST3411"); m_digestAlgs.Add(new DerObjectIdentifier("1.3.6.1.4.1.5849.1.2.1"), "GOST3411"); m_digestAlgs.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_256, "GOST3411-2012-256"); m_digestAlgs.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_512, "GOST3411-2012-512"); m_digestAliases.Add("SHA1", new string[]{ "SHA-1" }); m_digestAliases.Add("SHA224", new string[]{ "SHA-224" }); m_digestAliases.Add("SHA256", new string[]{ "SHA-256" }); m_digestAliases.Add("SHA384", new string[]{ "SHA-384" }); m_digestAliases.Add("SHA512", new string[]{ "SHA-512" }); m_noParams.Add(X9ObjectIdentifiers.IdDsaWithSha1); m_noParams.Add(X9ObjectIdentifiers.ECDsaWithSha1); m_noParams.Add(X9ObjectIdentifiers.ECDsaWithSha224); m_noParams.Add(X9ObjectIdentifiers.ECDsaWithSha256); m_noParams.Add(X9ObjectIdentifiers.ECDsaWithSha384); m_noParams.Add(X9ObjectIdentifiers.ECDsaWithSha512); m_ecAlgorithms.Add(CmsSignedGenerator.DigestSha1, X9ObjectIdentifiers.ECDsaWithSha1); m_ecAlgorithms.Add(CmsSignedGenerator.DigestSha224, X9ObjectIdentifiers.ECDsaWithSha224); m_ecAlgorithms.Add(CmsSignedGenerator.DigestSha256, X9ObjectIdentifiers.ECDsaWithSha256); m_ecAlgorithms.Add(CmsSignedGenerator.DigestSha384, X9ObjectIdentifiers.ECDsaWithSha384); m_ecAlgorithms.Add(CmsSignedGenerator.DigestSha512, X9ObjectIdentifiers.ECDsaWithSha512); } /** * Return the digest algorithm using one of the standard JCA string * representations rather than the algorithm identifier (if possible). */ internal static string GetDigestAlgName(DerObjectIdentifier digestOid) { if (m_digestAlgs.TryGetValue(digestOid, out var name)) return name; return digestOid.Id; } internal static AlgorithmIdentifier GetEncAlgorithmIdentifier(DerObjectIdentifier encOid, Asn1Encodable sigX509Parameters) { if (m_noParams.Contains(encOid)) return new AlgorithmIdentifier(encOid); return new AlgorithmIdentifier(encOid, sigX509Parameters); } internal static string[] GetDigestAliases(string algName) { return m_digestAliases.TryGetValue(algName, out var aliases) ? (string[])aliases.Clone() : new string[0]; } /** * Return the digest encryption algorithm using one of the standard * JCA string representations rather than the algorithm identifier (if * possible). */ internal static string GetEncryptionAlgName(DerObjectIdentifier encryptionOid) { if (m_encryptionAlgs.TryGetValue(encryptionOid, out var name)) return name; return encryptionOid.Id; } internal static IDigest GetDigestInstance(string algorithm) { try { return DigestUtilities.GetDigest(algorithm); } catch (SecurityUtilityException) { // This is probably superfluous on C#, since no provider infrastructure, // assuming DigestUtilities already knows all the aliases foreach (string alias in GetDigestAliases(algorithm)) { try { return DigestUtilities.GetDigest(alias); } catch (SecurityUtilityException) {} } throw; } } internal static ISigner GetSignatureInstance(string algorithm) { return SignerUtilities.GetSigner(algorithm); } internal static AlgorithmIdentifier FixDigestAlgID(AlgorithmIdentifier algID, IDigestAlgorithmFinder digestAlgorithmFinder) { var parameters = algID.Parameters; if (parameters == null || DerNull.Instance.Equals(parameters)) return digestAlgorithmFinder.Find(algID.Algorithm); return algID; } internal static DerObjectIdentifier GetEncOid(AsymmetricKeyParameter key, string digestOID) { DerObjectIdentifier encOid = null; if (key is RsaKeyParameters rsaKeyParameters) { if (!rsaKeyParameters.IsPrivate) throw new ArgumentException("Expected RSA private key"); encOid = PkcsObjectIdentifiers.RsaEncryption; } else if (key is DsaPrivateKeyParameters) { if (digestOID.Equals(CmsSignedGenerator.DigestSha1)) { encOid = X9ObjectIdentifiers.IdDsaWithSha1; } else if (digestOID.Equals(CmsSignedGenerator.DigestSha224)) { encOid = NistObjectIdentifiers.DsaWithSha224; } else if (digestOID.Equals(CmsSignedGenerator.DigestSha256)) { encOid = NistObjectIdentifiers.DsaWithSha256; } else if (digestOID.Equals(CmsSignedGenerator.DigestSha384)) { encOid = NistObjectIdentifiers.DsaWithSha384; } else if (digestOID.Equals(CmsSignedGenerator.DigestSha512)) { encOid = NistObjectIdentifiers.DsaWithSha512; } else { throw new ArgumentException("can't mix DSA with anything but SHA1/SHA2"); } } else if (key is ECPrivateKeyParameters ecPrivKey) { string algName = ecPrivKey.AlgorithmName; if (algName == "ECGOST3410") { encOid = CryptoProObjectIdentifiers.GostR3410x2001; } else if (ecPrivKey.Parameters is ECGost3410Parameters ecGost3410Parameters) { var digestParamSet = ecGost3410Parameters.DigestParamSet; if (digestParamSet.Equals(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_256)) { encOid = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256; } else if (digestParamSet.Equals(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_512)) { encOid = RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512; } else { throw new ArgumentException("can't determine GOST3410 algorithm"); } } else { // TODO Should we insist on algName being one of "EC" or "ECDSA", as Java does? if (!m_ecAlgorithms.TryGetValue(digestOID, out encOid)) throw new ArgumentException("can't mix ECDSA with anything but SHA family digests"); } } else if (key is Gost3410PrivateKeyParameters) { encOid = CryptoProObjectIdentifiers.GostR3410x94; } else { throw new ArgumentException("Unknown algorithm in CmsSignedGenerator.GetEncOid"); } return encOid; } internal static IStore GetAttributeCertificates(Asn1Set attrCertSet) { var contents = new List(); if (attrCertSet != null) { foreach (Asn1Encodable ae in attrCertSet) { if (ae.ToAsn1Object() is Asn1TaggedObject taggedObject && taggedObject.HasContextTag(2)) { var attributeCertificate = AttributeCertificate.GetInstance(taggedObject, false); contents.Add(new X509V2AttributeCertificate(attributeCertificate)); } } } return CollectionUtilities.CreateStore(contents); } internal static IStore GetCertificates(Asn1Set certSet) { var contents = new List(); if (certSet != null) { foreach (Asn1Encodable ae in certSet) { if (ae is X509CertificateStructure c) { contents.Add(new X509Certificate(c)); } else if (ae.ToAsn1Object() is Asn1Sequence s) { contents.Add(new X509Certificate(X509CertificateStructure.GetInstance(s))); } } } return CollectionUtilities.CreateStore(contents); } internal static IStore GetCrls(Asn1Set crlSet) { var contents = new List(); if (crlSet != null) { foreach (Asn1Encodable ae in crlSet) { if (ae is CertificateList c) { contents.Add(new X509Crl(c)); } else if (ae.ToAsn1Object() is Asn1Sequence s) { contents.Add(new X509Crl(CertificateList.GetInstance(s))); } } } return CollectionUtilities.CreateStore(contents); } internal static IStore GetOtherRevInfos(Asn1Set crlSet, DerObjectIdentifier infoFormat) { var contents = new List(); if (crlSet != null && infoFormat != null) { foreach (Asn1Encodable ae in crlSet) { if (ae.ToAsn1Object() is Asn1TaggedObject taggedObject && taggedObject.HasContextTag(1)) { var otherRevocationInfoFormat = OtherRevocationInfoFormat.GetInstance(taggedObject, false); if (infoFormat.Equals(otherRevocationInfoFormat.InfoFormat)) { contents.Add(otherRevocationInfoFormat.Info); } } } } return CollectionUtilities.CreateStore(contents); } } }