Пример #1
0
		public static string DumpDer(byte[] der)
		{
			StringBuilder builder = new StringBuilder();
			Asn1InputStream decoder = new Asn1InputStream(der);
			DerSequence seq = (DerSequence)decoder.ReadObject();
			builder.AppendLine("Version : " + Encoders.Hex.EncodeData(seq[0].GetDerEncoded()));
			builder.AppendLine("Private : " + Encoders.Hex.EncodeData(seq[1].GetDerEncoded()));
			builder.AppendLine("Params : " + Encoders.Hex.EncodeData(((DerTaggedObject)seq[2]).GetObject().GetDerEncoded()));
			builder.AppendLine("Public : " + Encoders.Hex.EncodeData(seq[3].GetDerEncoded()));
#if !PORTABLE
			decoder.Close();
#else
			decoder.Dispose();
#endif
			return builder.ToString();
		}
Пример #2
0
		public static ECKey FromDER(byte[] der)
		{

			// To understand this code, see the definition of the ASN.1 format for EC private keys in the OpenSSL source
			// code in ec_asn1.c:
			//
			// ASN1_SEQUENCE(EC_PRIVATEKEY) = {
			//   ASN1_SIMPLE(EC_PRIVATEKEY, version, LONG),
			//   ASN1_SIMPLE(EC_PRIVATEKEY, privateKey, ASN1_OCTET_STRING),
			//   ASN1_EXP_OPT(EC_PRIVATEKEY, parameters, ECPKPARAMETERS, 0),
			//   ASN1_EXP_OPT(EC_PRIVATEKEY, publicKey, ASN1_BIT_STRING, 1)
			// } ASN1_SEQUENCE_END(EC_PRIVATEKEY)
			//

			Asn1InputStream decoder = new Asn1InputStream(der);
			DerSequence seq = (DerSequence)decoder.ReadObject();
			CheckArgument(seq.Count == 4, "Input does not appear to be an ASN.1 OpenSSL EC private key");
			CheckArgument(((DerInteger)seq[0]).Value.Equals(BigInteger.One),
					"Input is of wrong version");
			byte[] bits = ((DerOctetString)seq[1]).GetOctets();
#if !PORTABLE
			decoder.Close();
#else
			decoder.Dispose();
#endif
			return new ECKey(bits, true);
		}