1 files changed, 128 insertions, 0 deletions
diff --git a/Crypto/src/x509/X509SignatureUtil.cs b/Crypto/src/x509/X509SignatureUtil.cs
new file mode 100644
index 000000000..7a4ab1448
--- /dev/null
+++ b/Crypto/src/x509/X509SignatureUtil.cs
@@ -0,0 +1,128 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.CryptoPro;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.Oiw;
+using Org.BouncyCastle.Asn1.Pkcs;
+using Org.BouncyCastle.Asn1.TeleTrust;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Crypto;
+
+namespace Org.BouncyCastle.X509
+{
+ internal class X509SignatureUtilities
+ {
+ private static readonly Asn1Null derNull = DerNull.Instance;
+
+ internal static void SetSignatureParameters(
+ ISigner signature,
+ Asn1Encodable parameters)
+ {
+ if (parameters != null && !derNull.Equals(parameters))
+ {
+ // TODO Put back in
+// AlgorithmParameters sigParams = AlgorithmParameters.GetInstance(signature.getAlgorithm());
+//
+// try
+// {
+// sigParams.Init(parameters.ToAsn1Object().GetDerEncoded());
+// }
+// catch (IOException e)
+// {
+// throw new SignatureException("IOException decoding parameters: " + e.Message);
+// }
+//
+// if (signature.getAlgorithm().EndsWith("MGF1"))
+// {
+// try
+// {
+// signature.setParameter(sigParams.getParameterSpec(PSSParameterSpec.class));
+// }
+// catch (GeneralSecurityException e)
+// {
+// throw new SignatureException("Exception extracting parameters: " + e.Message);
+// }
+// }
+ }
+ }
+
+ internal static string GetSignatureName(
+ AlgorithmIdentifier sigAlgId)
+ {
+ Asn1Encodable parameters = sigAlgId.Parameters;
+
+ if (parameters != null && !derNull.Equals(parameters))
+ {
+ if (sigAlgId.ObjectID.Equals(PkcsObjectIdentifiers.IdRsassaPss))
+ {
+ RsassaPssParameters rsaParams = RsassaPssParameters.GetInstance(parameters);
+
+ return GetDigestAlgName(rsaParams.HashAlgorithm.ObjectID) + "withRSAandMGF1";
+ }
+ if (sigAlgId.ObjectID.Equals(X9ObjectIdentifiers.ECDsaWithSha2))
+ {
+ Asn1Sequence ecDsaParams = Asn1Sequence.GetInstance(parameters);
+
+ return GetDigestAlgName((DerObjectIdentifier)ecDsaParams[0]) + "withECDSA";
+ }
+ }
+
+ return sigAlgId.ObjectID.Id;
+ }
+
+ /**
+ * Return the digest algorithm using one of the standard JCA string
+ * representations rather than the algorithm identifier (if possible).
+ */
+ private static string GetDigestAlgName(
+ DerObjectIdentifier digestAlgOID)
+ {
+ if (PkcsObjectIdentifiers.MD5.Equals(digestAlgOID))
+ {
+ return "MD5";
+ }
+ else if (OiwObjectIdentifiers.IdSha1.Equals(digestAlgOID))
+ {
+ return "SHA1";
+ }
+ else if (NistObjectIdentifiers.IdSha224.Equals(digestAlgOID))
+ {
+ return "SHA224";
+ }
+ else if (NistObjectIdentifiers.IdSha256.Equals(digestAlgOID))
+ {
+ return "SHA256";
+ }
+ else if (NistObjectIdentifiers.IdSha384.Equals(digestAlgOID))
+ {
+ return "SHA384";
+ }
+ else if (NistObjectIdentifiers.IdSha512.Equals(digestAlgOID))
+ {
+ return "SHA512";
+ }
+ else if (TeleTrusTObjectIdentifiers.RipeMD128.Equals(digestAlgOID))
+ {
+ return "RIPEMD128";
+ }
+ else if (TeleTrusTObjectIdentifiers.RipeMD160.Equals(digestAlgOID))
+ {
+ return "RIPEMD160";
+ }
+ else if (TeleTrusTObjectIdentifiers.RipeMD256.Equals(digestAlgOID))
+ {
+ return "RIPEMD256";
+ }
+ else if (CryptoProObjectIdentifiers.GostR3411.Equals(digestAlgOID))
+ {
+ return "GOST3411";
+ }
+ else
+ {
+ return digestAlgOID.Id;
+ }
+ }
+ }
+}
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