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using System;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities.IO.Pem;
namespace Org.BouncyCastle.OpenSsl
{
public class Pkcs8Generator
: PemObjectGenerator
{
// FIXME See PbeUtilities static constructor
// public static readonly string Aes128Cbc = NistObjectIdentifiers.IdAes128Cbc.Id;
// public static readonly string Aes192Cbc = NistObjectIdentifiers.IdAes192Cbc.Id;
// public static readonly string Aes256Cbc = NistObjectIdentifiers.IdAes256Cbc.Id;
//
// public static readonly string Des3Cbc = PkcsObjectIdentifiers.DesEde3Cbc.Id;
public static readonly string PbeSha1_RC4_128 = PkcsObjectIdentifiers.PbeWithShaAnd128BitRC4.Id;
public static readonly string PbeSha1_RC4_40 = PkcsObjectIdentifiers.PbeWithShaAnd40BitRC4.Id;
public static readonly string PbeSha1_3DES = PkcsObjectIdentifiers.PbeWithShaAnd3KeyTripleDesCbc.Id;
public static readonly string PbeSha1_2DES = PkcsObjectIdentifiers.PbeWithShaAnd2KeyTripleDesCbc.Id;
public static readonly string PbeSha1_RC2_128 = PkcsObjectIdentifiers.PbeWithShaAnd128BitRC2Cbc.Id;
public static readonly string PbeSha1_RC2_40 = PkcsObjectIdentifiers.PbewithShaAnd40BitRC2Cbc.Id;
private char[] password;
private string algorithm;
private int iterationCount;
private AsymmetricKeyParameter privKey;
private SecureRandom random;
/**
* Constructor for an unencrypted private key PEM object.
*
* @param key private key to be encoded.
*/
public Pkcs8Generator(AsymmetricKeyParameter privKey)
{
this.privKey = privKey;
}
/**
* Constructor for an encrypted private key PEM object.
*
* @param key private key to be encoded
* @param algorithm encryption algorithm to use
* @param provider provider to use
* @throws NoSuchAlgorithmException if algorithm/mode cannot be found
*/
public Pkcs8Generator(AsymmetricKeyParameter privKey, string algorithm)
{
// TODO Check privKey.IsPrivate
this.privKey = privKey;
this.algorithm = algorithm;
this.iterationCount = 2048;
}
public SecureRandom SecureRandom
{
set { this.random = value; }
}
public char[] Password
{
set { this.password = value; }
}
public int IterationCount
{
set { this.iterationCount = value; }
}
public PemObject Generate()
{
if (algorithm == null)
{
PrivateKeyInfo pki = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privKey);
return new PemObject("PRIVATE KEY", pki.GetEncoded());
}
// TODO Theoretically, the amount of salt needed depends on the algorithm
byte[] salt = new byte[20];
random = CryptoServicesRegistrar.GetSecureRandom(random);
random.NextBytes(salt);
try
{
EncryptedPrivateKeyInfo epki = EncryptedPrivateKeyInfoFactory.CreateEncryptedPrivateKeyInfo(
algorithm, password, salt, iterationCount, privKey);
return new PemObject("ENCRYPTED PRIVATE KEY", epki.GetEncoded());
}
catch (Exception e)
{
throw new PemGenerationException("Couldn't encrypt private key", e);
}
}
}
}
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