207 lines
8.6 KiB
C#
207 lines
8.6 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using System.Collections.Generic;
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using System.IO;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.CryptoPro;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.GM;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Nist;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Oiw;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Pkcs;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Rosstandart;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.TeleTrust;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.X509;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Cms;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.X509;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Tsp
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{
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public class TspUtil
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{
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private static readonly Dictionary<string, int> DigestLengths = new Dictionary<string, int>();
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private static readonly Dictionary<string, string> DigestNames = new Dictionary<string, string>();
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static TspUtil()
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{
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DigestLengths.Add(PkcsObjectIdentifiers.MD5.Id, 16);
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DigestLengths.Add(OiwObjectIdentifiers.IdSha1.Id, 20);
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DigestLengths.Add(NistObjectIdentifiers.IdSha224.Id, 28);
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DigestLengths.Add(NistObjectIdentifiers.IdSha256.Id, 32);
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DigestLengths.Add(NistObjectIdentifiers.IdSha384.Id, 48);
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DigestLengths.Add(NistObjectIdentifiers.IdSha512.Id, 64);
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DigestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, 16);
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DigestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, 20);
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DigestLengths.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, 32);
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DigestLengths.Add(CryptoProObjectIdentifiers.GostR3411.Id, 32);
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DigestLengths.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_256.Id, 32);
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DigestLengths.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_512.Id, 64);
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DigestLengths.Add(GMObjectIdentifiers.sm3.Id, 32);
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DigestNames.Add(PkcsObjectIdentifiers.MD5.Id, "MD5");
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DigestNames.Add(OiwObjectIdentifiers.IdSha1.Id, "SHA1");
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DigestNames.Add(NistObjectIdentifiers.IdSha224.Id, "SHA224");
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DigestNames.Add(NistObjectIdentifiers.IdSha256.Id, "SHA256");
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DigestNames.Add(NistObjectIdentifiers.IdSha384.Id, "SHA384");
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DigestNames.Add(NistObjectIdentifiers.IdSha512.Id, "SHA512");
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DigestNames.Add(PkcsObjectIdentifiers.MD5WithRsaEncryption.Id, "MD5");
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DigestNames.Add(PkcsObjectIdentifiers.Sha1WithRsaEncryption.Id, "SHA1");
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DigestNames.Add(PkcsObjectIdentifiers.Sha224WithRsaEncryption.Id, "SHA224");
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DigestNames.Add(PkcsObjectIdentifiers.Sha256WithRsaEncryption.Id, "SHA256");
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DigestNames.Add(PkcsObjectIdentifiers.Sha384WithRsaEncryption.Id, "SHA384");
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DigestNames.Add(PkcsObjectIdentifiers.Sha512WithRsaEncryption.Id, "SHA512");
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DigestNames.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, "RIPEMD128");
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DigestNames.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, "RIPEMD160");
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DigestNames.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, "RIPEMD256");
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DigestNames.Add(CryptoProObjectIdentifiers.GostR3411.Id, "GOST3411");
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DigestNames.Add(OiwObjectIdentifiers.DsaWithSha1.Id, "SHA1");
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DigestNames.Add(OiwObjectIdentifiers.Sha1WithRsa.Id, "SHA1");
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DigestNames.Add(OiwObjectIdentifiers.MD5WithRsa.Id, "MD5");
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DigestNames.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_256.Id, "GOST3411-2012-256");
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DigestNames.Add(RosstandartObjectIdentifiers.id_tc26_gost_3411_12_512.Id, "GOST3411-2012-512");
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DigestNames.Add(GMObjectIdentifiers.sm3.Id, "SM3");
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}
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/**
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* Fetches the signature time-stamp attributes from a SignerInformation object.
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* Checks that the MessageImprint for each time-stamp matches the signature field.
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* (see RFC 3161 Appendix A).
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*
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* @param signerInfo a SignerInformation to search for time-stamps
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* @return a collection of TimeStampToken objects
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* @throws TSPValidationException
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*/
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public static IList<TimeStampToken> GetSignatureTimestamps(
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SignerInformation signerInfo)
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{
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var timestamps = new List<TimeStampToken>();
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Asn1.Cms.AttributeTable unsignedAttrs = signerInfo.UnsignedAttributes;
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if (unsignedAttrs != null)
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{
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foreach (Asn1.Cms.Attribute tsAttr in unsignedAttrs.GetAll(
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PkcsObjectIdentifiers.IdAASignatureTimeStampToken))
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{
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foreach (Asn1Encodable asn1 in tsAttr.AttrValues)
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{
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try
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{
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Asn1.Cms.ContentInfo contentInfo = Asn1.Cms.ContentInfo.GetInstance(
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asn1.ToAsn1Object());
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TimeStampToken timeStampToken = new TimeStampToken(contentInfo);
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TimeStampTokenInfo tstInfo = timeStampToken.TimeStampInfo;
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byte[] expectedDigest = DigestUtilities.CalculateDigest(
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GetDigestAlgName(tstInfo.MessageImprintAlgOid),
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signerInfo.GetSignature());
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if (!Arrays.ConstantTimeAreEqual(expectedDigest, tstInfo.GetMessageImprintDigest()))
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throw new TspValidationException("Incorrect digest in message imprint");
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timestamps.Add(timeStampToken);
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}
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catch (SecurityUtilityException)
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{
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throw new TspValidationException("Unknown hash algorithm specified in timestamp");
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}
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catch (Exception)
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{
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throw new TspValidationException("Timestamp could not be parsed");
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}
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}
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}
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}
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return timestamps;
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}
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/**
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* Validate the passed in certificate as being of the correct type to be used
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* for time stamping. To be valid it must have an ExtendedKeyUsage extension
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* which has a key purpose identifier of id-kp-timeStamping.
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*
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* @param cert the certificate of interest.
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* @throws TspValidationException if the certicate fails on one of the check points.
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*/
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public static void ValidateCertificate(
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X509Certificate cert)
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{
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if (cert.Version != 3)
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throw new ArgumentException("Certificate must have an ExtendedKeyUsage extension.");
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Asn1OctetString ext = cert.GetExtensionValue(X509Extensions.ExtendedKeyUsage);
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if (ext == null)
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throw new TspValidationException("Certificate must have an ExtendedKeyUsage extension.");
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if (!cert.GetCriticalExtensionOids().Contains(X509Extensions.ExtendedKeyUsage.Id))
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throw new TspValidationException("Certificate must have an ExtendedKeyUsage extension marked as critical.");
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try
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{
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ExtendedKeyUsage extKey = ExtendedKeyUsage.GetInstance(
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Asn1Object.FromByteArray(ext.GetOctets()));
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if (!extKey.HasKeyPurposeId(KeyPurposeID.id_kp_timeStamping) || extKey.Count != 1)
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throw new TspValidationException("ExtendedKeyUsage not solely time stamping.");
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}
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catch (IOException)
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{
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throw new TspValidationException("cannot process ExtendedKeyUsage extension");
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}
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}
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/// <summary>
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/// Return the digest algorithm using one of the standard JCA string
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/// representations rather than the algorithm identifier (if possible).
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/// </summary>
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internal static string GetDigestAlgName(string digestAlgOid)
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{
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return CollectionUtilities.GetValueOrKey(DigestNames, digestAlgOid);
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}
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internal static int GetDigestLength(string digestAlgOid)
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{
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if (!DigestLengths.TryGetValue(digestAlgOid, out int length))
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throw new TspException("digest algorithm cannot be found.");
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return length;
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}
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internal static IDigest CreateDigestInstance(string digestAlgOID)
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{
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string digestName = GetDigestAlgName(digestAlgOID);
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return DigestUtilities.GetDigest(digestName);
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}
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internal static ISet<DerObjectIdentifier> GetCriticalExtensionOids(X509Extensions extensions)
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{
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return extensions == null
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? new HashSet<DerObjectIdentifier>()
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: new HashSet<DerObjectIdentifier>(extensions.GetCriticalExtensionOids());
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}
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internal static ISet<DerObjectIdentifier> GetNonCriticalExtensionOids(X509Extensions extensions)
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{
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return extensions == null
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? new HashSet<DerObjectIdentifier>()
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: new HashSet<DerObjectIdentifier>(extensions.GetNonCriticalExtensionOids());
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}
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internal static IList<DerObjectIdentifier> GetExtensionOids(X509Extensions extensions)
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{
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return extensions == null
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? new List<DerObjectIdentifier>()
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: new List<DerObjectIdentifier>(extensions.GetExtensionOids());
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}
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}
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}
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#pragma warning restore
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#endif
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