76 lines
2.2 KiB
C#
76 lines
2.2 KiB
C#
using System;
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using Org.BouncyCastle.Asn1;
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using Org.BouncyCastle.Asn1.Pkcs;
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using Org.BouncyCastle.Asn1.X509;
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using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Security;
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namespace Org.BouncyCastle.Pkcs
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{
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public sealed class EncryptedPrivateKeyInfoFactory
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{
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private EncryptedPrivateKeyInfoFactory()
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{
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}
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public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
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DerObjectIdentifier algorithm,
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char[] passPhrase,
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byte[] salt,
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int iterationCount,
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AsymmetricKeyParameter key)
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{
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return CreateEncryptedPrivateKeyInfo(
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algorithm.Id, passPhrase, salt, iterationCount,
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PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
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}
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public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
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string algorithm,
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char[] passPhrase,
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byte[] salt,
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int iterationCount,
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AsymmetricKeyParameter key)
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{
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return CreateEncryptedPrivateKeyInfo(
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algorithm, passPhrase, salt, iterationCount,
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PrivateKeyInfoFactory.CreatePrivateKeyInfo(key));
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}
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public static EncryptedPrivateKeyInfo CreateEncryptedPrivateKeyInfo(
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string algorithm,
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char[] passPhrase,
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byte[] salt,
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int iterationCount,
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PrivateKeyInfo keyInfo)
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{
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if (!PbeUtilities.IsPbeAlgorithm(algorithm))
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throw new ArgumentException("attempt to use non-PBE algorithm with PBE EncryptedPrivateKeyInfo generation");
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IBufferedCipher cipher = PbeUtilities.CreateEngine(algorithm) 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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Asn1Encodable parameters = PbeUtilities.GenerateAlgorithmParameters(
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algorithm, salt, iterationCount);
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ICipherParameters keyParameters = PbeUtilities.GenerateCipherParameters(
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algorithm, passPhrase, parameters);
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cipher.Init(true, keyParameters);
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byte[] keyBytes = keyInfo.GetEncoded();
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byte[] encoding = cipher.DoFinal(keyBytes);
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DerObjectIdentifier oid = PbeUtilities.GetObjectIdentifier(algorithm);
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AlgorithmIdentifier algID = new AlgorithmIdentifier(oid, parameters);
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return new EncryptedPrivateKeyInfo(algID, encoding);
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}
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}
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}
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