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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
namespace Org.BouncyCastle.Pkcs
{
public sealed class EncryptedPrivateKeyInfoFactory
{
private EncryptedPrivateKeyInfoFactory()
{
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
DerObjectIdentifier algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
AsymmetricKeyParameter key)
{
return CreateEncryptedPrivateKeyInfo(
algorithm.Id, passPhrase, salt, iterationCount,
PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
string algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
AsymmetricKeyParameter key)
{
return CreateEncryptedPrivateKeyInfo(
algorithm, passPhrase, salt, iterationCount,
PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
}
public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
string algorithm,
char[] passPhrase,
byte[] salt,
int iterationCount,
PrivateKeyInfo keyInfo)
{
IBufferedCipher cipher = PbeUtilities.CreateEngine(algorithm) as IBufferedCipher;
if (cipher == null)
throw new Exception("Unknown encryption algorithm: " + algorithm);
Asn1Encodable pbeParameters = PbeUtilities.GenerateAlgorithmParameters(
algorithm, salt, iterationCount);
ICipherParameters cipherParameters = PbeUtilities.GenerateCipherParameters(
algorithm, passPhrase, pbeParameters);
cipher.Init(true, cipherParameters);
byte[] encoding = cipher.DoFinal(keyInfo.GetEncoded());
DerObjectIdentifier oid = PbeUtilities.GetObjectIdentifier(algorithm);
AlgorithmIdentifier algID = new AlgorithmIdentifier(oid, pbeParameters);
return new EncryptedPrivateKeyInfo(algID, encoding);
}
}
}
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