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211
iTechSharp/srcbc/pkcs/PrivateKeyInfoFactory.cs
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211
iTechSharp/srcbc/pkcs/PrivateKeyInfoFactory.cs
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using System;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.CryptoPro;
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using Org.BouncyCastle.Asn1.Oiw;
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using Org.BouncyCastle.Asn1.Pkcs;
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using Org.BouncyCastle.Asn1.Sec;
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using Org.BouncyCastle.Asn1.X509;
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using Org.BouncyCastle.Asn1.X9;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Pkcs
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{
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public sealed class PrivateKeyInfoFactory
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{
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private PrivateKeyInfoFactory()
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{
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}
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public static PrivateKeyInfo CreatePrivateKeyInfo(
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AsymmetricKeyParameter key)
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{
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if (key == null)
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throw new ArgumentNullException("key");
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if (!key.IsPrivate)
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throw new ArgumentException("Public key passed - private key expected", "key");
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if (key is ElGamalPrivateKeyParameters)
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{
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ElGamalPrivateKeyParameters _key = (ElGamalPrivateKeyParameters)key;
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return new PrivateKeyInfo(
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new AlgorithmIdentifier(
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OiwObjectIdentifiers.ElGamalAlgorithm,
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new ElGamalParameter(
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_key.Parameters.P,
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_key.Parameters.G).ToAsn1Object()),
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new DerInteger(_key.X));
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}
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if (key is DsaPrivateKeyParameters)
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{
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DsaPrivateKeyParameters _key = (DsaPrivateKeyParameters)key;
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return new PrivateKeyInfo(
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new AlgorithmIdentifier(
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X9ObjectIdentifiers.IdDsa,
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new DsaParameter(
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_key.Parameters.P,
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_key.Parameters.Q,
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_key.Parameters.G).ToAsn1Object()),
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new DerInteger(_key.X));
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}
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if (key is DHPrivateKeyParameters)
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{
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/*
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Process DH private key.
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The value for L was set to zero implicitly.
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This is the same action as found in JCEDHPrivateKey GetEncoded method.
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*/
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DHPrivateKeyParameters _key = (DHPrivateKeyParameters)key;
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DHParameter withNewL = new DHParameter(
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_key.Parameters.P, _key.Parameters.G, 0);
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return new PrivateKeyInfo(
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new AlgorithmIdentifier(
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PkcsObjectIdentifiers.DhKeyAgreement,
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withNewL.ToAsn1Object()),
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new DerInteger(_key.X));
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}
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if (key is RsaKeyParameters)
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{
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AlgorithmIdentifier algID = new AlgorithmIdentifier(
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PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance);
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RsaPrivateKeyStructure keyStruct;
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if (key is RsaPrivateCrtKeyParameters)
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{
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RsaPrivateCrtKeyParameters _key = (RsaPrivateCrtKeyParameters)key;
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keyStruct = new RsaPrivateKeyStructure(
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_key.Modulus,
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_key.PublicExponent,
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_key.Exponent,
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_key.P,
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_key.Q,
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_key.DP,
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_key.DQ,
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_key.QInv);
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}
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else
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{
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RsaKeyParameters _key = (RsaKeyParameters) key;
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keyStruct = new RsaPrivateKeyStructure(
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_key.Modulus,
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BigInteger.Zero,
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_key.Exponent,
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BigInteger.Zero,
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BigInteger.Zero,
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BigInteger.Zero,
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BigInteger.Zero,
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BigInteger.Zero);
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}
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return new PrivateKeyInfo(algID, keyStruct.ToAsn1Object());
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}
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if (key is ECPrivateKeyParameters)
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{
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ECPrivateKeyParameters _key = (ECPrivateKeyParameters)key;
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AlgorithmIdentifier algID;
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if (_key.AlgorithmName == "ECGOST3410")
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{
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if (_key.PublicKeyParamSet == null)
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throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");
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Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
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_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);
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algID = new AlgorithmIdentifier(
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CryptoProObjectIdentifiers.GostR3410x2001,
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gostParams.ToAsn1Object());
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}
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else
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{
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X9ECParameters ecP = new X9ECParameters(
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_key.Parameters.Curve,
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_key.Parameters.G,
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_key.Parameters.N,
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_key.Parameters.H,
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_key.Parameters.GetSeed());
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X962Parameters x962 = new X962Parameters(ecP);
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algID = new AlgorithmIdentifier(
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X9ObjectIdentifiers.IdECPublicKey,
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x962.ToAsn1Object());
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}
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return new PrivateKeyInfo(algID, new ECPrivateKeyStructure(_key.D).ToAsn1Object());
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}
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if (key is Gost3410PrivateKeyParameters)
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{
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Gost3410PrivateKeyParameters _key = (Gost3410PrivateKeyParameters)key;
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if (_key.PublicKeyParamSet == null)
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throw Platform.CreateNotImplementedException("Not a CryptoPro parameter set");
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byte[] keyEnc = _key.X.ToByteArrayUnsigned();
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byte[] keyBytes = new byte[keyEnc.Length];
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for (int i = 0; i != keyBytes.Length; i++)
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{
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keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
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}
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Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
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_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet, null);
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AlgorithmIdentifier algID = new AlgorithmIdentifier(
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CryptoProObjectIdentifiers.GostR3410x94,
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algParams.ToAsn1Object());
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return new PrivateKeyInfo(algID, new DerOctetString(keyBytes));
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}
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throw new ArgumentException("Class provided is not convertible: " + key.GetType().FullName);
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}
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public static PrivateKeyInfo CreatePrivateKeyInfo(
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char[] passPhrase,
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EncryptedPrivateKeyInfo encInfo)
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{
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return CreatePrivateKeyInfo(passPhrase, false, encInfo);
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}
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public static PrivateKeyInfo CreatePrivateKeyInfo(
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char[] passPhrase,
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bool wrongPkcs12Zero,
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EncryptedPrivateKeyInfo encInfo)
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{
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AlgorithmIdentifier algID = encInfo.EncryptionAlgorithm;
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IBufferedCipher cipher = PbeUtilities.CreateEngine(algID.ObjectID) as IBufferedCipher;
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if (cipher == null)
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{
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// TODO Throw exception?
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}
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ICipherParameters keyParameters = PbeUtilities.GenerateCipherParameters(
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algID.ObjectID, passPhrase, wrongPkcs12Zero, algID.Parameters);
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cipher.Init(false, keyParameters);
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byte[] keyBytes = encInfo.GetEncryptedData();
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byte[] encoding = cipher.DoFinal(keyBytes);
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Asn1Object asn1Data = Asn1Object.FromByteArray(encoding);
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return PrivateKeyInfo.GetInstance(asn1Data);
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}
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}
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}
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