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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.CryptoPro;
using Org.BouncyCastle.Asn1.EdEC;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.Rosstandart;
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Pkcs
{
public static class PrivateKeyInfoFactory
{
public static PrivateKeyInfo CreatePrivateKeyInfo(
AsymmetricKeyParameter privateKey)
{
return CreatePrivateKeyInfo(privateKey, null);
}
/**
* Create a PrivateKeyInfo representation of a private key with attributes.
*
* @param privateKey the key to be encoded into the info object.
* @param attributes the set of attributes to be included.
* @return the appropriate PrivateKeyInfo
* @throws java.io.IOException on an error encoding the key
*/
public static PrivateKeyInfo CreatePrivateKeyInfo(AsymmetricKeyParameter privateKey, Asn1Set attributes)
{
if (privateKey == null)
throw new ArgumentNullException("privateKey");
if (!privateKey.IsPrivate)
throw new ArgumentException("Public key passed - private key expected", "privateKey");
if (privateKey is ElGamalPrivateKeyParameters)
{
ElGamalPrivateKeyParameters _key = (ElGamalPrivateKeyParameters)privateKey;
ElGamalParameters egp = _key.Parameters;
return new PrivateKeyInfo(
new AlgorithmIdentifier(OiwObjectIdentifiers.ElGamalAlgorithm, new ElGamalParameter(egp.P, egp.G).ToAsn1Object()),
new DerInteger(_key.X),
attributes);
}
if (privateKey is DsaPrivateKeyParameters)
{
DsaPrivateKeyParameters _key = (DsaPrivateKeyParameters)privateKey;
DsaParameters dp = _key.Parameters;
return new PrivateKeyInfo(
new AlgorithmIdentifier(X9ObjectIdentifiers.IdDsa, new DsaParameter(dp.P, dp.Q, dp.G).ToAsn1Object()),
new DerInteger(_key.X),
attributes);
}
if (privateKey is DHPrivateKeyParameters)
{
DHPrivateKeyParameters _key = (DHPrivateKeyParameters)privateKey;
DHParameter p = new DHParameter(
_key.Parameters.P, _key.Parameters.G, _key.Parameters.L);
return new PrivateKeyInfo(
new AlgorithmIdentifier(_key.AlgorithmOid, p.ToAsn1Object()),
new DerInteger(_key.X),
attributes);
}
if (privateKey is RsaKeyParameters)
{
AlgorithmIdentifier algID = new AlgorithmIdentifier(
PkcsObjectIdentifiers.RsaEncryption, DerNull.Instance);
RsaPrivateKeyStructure keyStruct;
if (privateKey is RsaPrivateCrtKeyParameters)
{
RsaPrivateCrtKeyParameters _key = (RsaPrivateCrtKeyParameters)privateKey;
keyStruct = new RsaPrivateKeyStructure(
_key.Modulus,
_key.PublicExponent,
_key.Exponent,
_key.P,
_key.Q,
_key.DP,
_key.DQ,
_key.QInv);
}
else
{
RsaKeyParameters _key = (RsaKeyParameters) privateKey;
keyStruct = new RsaPrivateKeyStructure(
_key.Modulus,
BigInteger.Zero,
_key.Exponent,
BigInteger.Zero,
BigInteger.Zero,
BigInteger.Zero,
BigInteger.Zero,
BigInteger.Zero);
}
return new PrivateKeyInfo(algID, keyStruct.ToAsn1Object(), attributes);
}
if (privateKey is ECPrivateKeyParameters)
{
ECPrivateKeyParameters priv = (ECPrivateKeyParameters) privateKey;
DerBitString publicKey = new DerBitString(ECKeyPairGenerator.GetCorrespondingPublicKey(priv).Q.GetEncoded(false));
ECDomainParameters dp = priv.Parameters;
// ECGOST3410
if (dp is ECGost3410Parameters)
{
ECGost3410Parameters domainParameters = (ECGost3410Parameters) dp;
Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
(domainParameters).PublicKeyParamSet,
(domainParameters).DigestParamSet,
(domainParameters).EncryptionParamSet);
bool is512 = priv.D.BitLength > 256;
DerObjectIdentifier identifier = (is512) ?
RosstandartObjectIdentifiers.id_tc26_gost_3410_12_512 :
RosstandartObjectIdentifiers.id_tc26_gost_3410_12_256;
int size = (is512) ? 64 : 32;
byte[] encKey = new byte[size];
ExtractBytes(encKey, size, 0, priv.D);
return new PrivateKeyInfo(new AlgorithmIdentifier(identifier, gostParams), new DerOctetString(encKey));
}
int orderBitLength = dp.N.BitLength;
AlgorithmIdentifier algID;
ECPrivateKeyStructure ec;
if (priv.AlgorithmName == "ECGOST3410")
{
if (priv.PublicKeyParamSet == null)
throw new NotImplementedException("Not a CryptoPro parameter set");
Gost3410PublicKeyAlgParameters gostParams = new Gost3410PublicKeyAlgParameters(
priv.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet);
algID = new AlgorithmIdentifier(CryptoProObjectIdentifiers.GostR3410x2001, gostParams);
// TODO Do we need to pass any parameters here?
ec = new ECPrivateKeyStructure(orderBitLength, priv.D, publicKey, null);
}
else
{
X962Parameters x962;
if (priv.PublicKeyParamSet == null)
{
X9ECParameters ecP = new X9ECParameters(dp.Curve, new X9ECPoint(dp.G, false), dp.N, dp.H,
dp.GetSeed());
x962 = new X962Parameters(ecP);
}
else
{
x962 = new X962Parameters(priv.PublicKeyParamSet);
}
ec = new ECPrivateKeyStructure(orderBitLength, priv.D, publicKey, x962);
algID = new AlgorithmIdentifier(X9ObjectIdentifiers.IdECPublicKey, x962);
}
return new PrivateKeyInfo(algID, ec, attributes);
}
if (privateKey is Gost3410PrivateKeyParameters)
{
Gost3410PrivateKeyParameters _key = (Gost3410PrivateKeyParameters)privateKey;
if (_key.PublicKeyParamSet == null)
throw new NotImplementedException("Not a CryptoPro parameter set");
byte[] keyEnc = _key.X.ToByteArrayUnsigned();
byte[] keyBytes = new byte[keyEnc.Length];
for (int i = 0; i != keyBytes.Length; i++)
{
keyBytes[i] = keyEnc[keyEnc.Length - 1 - i]; // must be little endian
}
Gost3410PublicKeyAlgParameters algParams = new Gost3410PublicKeyAlgParameters(
_key.PublicKeyParamSet, CryptoProObjectIdentifiers.GostR3411x94CryptoProParamSet, null);
AlgorithmIdentifier algID = new AlgorithmIdentifier(
CryptoProObjectIdentifiers.GostR3410x94,
algParams.ToAsn1Object());
return new PrivateKeyInfo(algID, new DerOctetString(keyBytes), attributes);
}
if (privateKey is X448PrivateKeyParameters)
{
X448PrivateKeyParameters key = (X448PrivateKeyParameters)privateKey;
return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X448),
new DerOctetString(key.GetEncoded()), attributes, key.GeneratePublicKey().GetEncoded());
}
if (privateKey is X25519PrivateKeyParameters)
{
X25519PrivateKeyParameters key = (X25519PrivateKeyParameters)privateKey;
return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_X25519),
new DerOctetString(key.GetEncoded()), attributes, key.GeneratePublicKey().GetEncoded());
}
if (privateKey is Ed448PrivateKeyParameters)
{
Ed448PrivateKeyParameters key = (Ed448PrivateKeyParameters)privateKey;
return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed448),
new DerOctetString(key.GetEncoded()), attributes, key.GeneratePublicKey().GetEncoded());
}
if (privateKey is Ed25519PrivateKeyParameters)
{
Ed25519PrivateKeyParameters key = (Ed25519PrivateKeyParameters)privateKey;
return new PrivateKeyInfo(new AlgorithmIdentifier(EdECObjectIdentifiers.id_Ed25519),
new DerOctetString(key.GetEncoded()), attributes, key.GeneratePublicKey().GetEncoded());
}
throw new ArgumentException("Class provided is not convertible: " + Platform.GetTypeName(privateKey));
}
public static PrivateKeyInfo CreatePrivateKeyInfo(
char[] passPhrase,
EncryptedPrivateKeyInfo encInfo)
{
return CreatePrivateKeyInfo(passPhrase, false, encInfo);
}
public static PrivateKeyInfo CreatePrivateKeyInfo(
char[] passPhrase,
bool wrongPkcs12Zero,
EncryptedPrivateKeyInfo encInfo)
{
AlgorithmIdentifier algID = encInfo.EncryptionAlgorithm;
IBufferedCipher cipher = PbeUtilities.CreateEngine(algID) as IBufferedCipher;
if (cipher == null)
throw new Exception("Unknown encryption algorithm: " + algID.Algorithm);
ICipherParameters cipherParameters = PbeUtilities.GenerateCipherParameters(
algID, passPhrase, wrongPkcs12Zero);
cipher.Init(false, cipherParameters);
byte[] keyBytes = cipher.DoFinal(encInfo.GetEncryptedData());
return PrivateKeyInfo.GetInstance(keyBytes);
}
private static void ExtractBytes(byte[] encKey, int size, int offSet, BigInteger bI)
{
byte[] val = bI.ToByteArray();
if (val.Length < size)
{
byte[] tmp = new byte[size];
Array.Copy(val, 0, tmp, tmp.Length - val.Length, val.Length);
val = tmp;
}
for (int i = 0; i != size; i++)
{
encKey[offSet + i] = val[val.Length - 1 - i];
}
}
}
}
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