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using System;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Utilities;
//import javax.crypto.interfaces.PBEKey;
namespace Org.BouncyCastle.Cms
{
public abstract class CmsPbeKey
// TODO Create an equivalent interface somewhere?
// : PBEKey
: ICipherParameters
{
internal readonly char[] password;
internal readonly byte[] salt;
internal readonly int iterationCount;
public CmsPbeKey(
char[] password,
byte[] salt,
int iterationCount)
{
this.password = (char[])password.Clone();
this.salt = Arrays.Clone(salt);
this.iterationCount = iterationCount;
}
public CmsPbeKey(
char[] password,
AlgorithmIdentifier keyDerivationAlgorithm)
{
if (!keyDerivationAlgorithm.Algorithm.Equals(PkcsObjectIdentifiers.IdPbkdf2))
throw new ArgumentException("Unsupported key derivation algorithm: "
+ keyDerivationAlgorithm.Algorithm);
Pbkdf2Params kdfParams = Pbkdf2Params.GetInstance(
keyDerivationAlgorithm.Parameters.ToAsn1Object());
this.password = (char[])password.Clone();
this.salt = kdfParams.GetSalt();
this.iterationCount = kdfParams.IterationCount.IntValue;
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
public CmsPbeKey(ReadOnlySpan<char> password, ReadOnlySpan<byte> salt, int iterationCount)
{
this.password = password.ToArray();
this.salt = salt.ToArray();
this.iterationCount = iterationCount;
}
public CmsPbeKey(ReadOnlySpan<char> password, AlgorithmIdentifier keyDerivationAlgorithm)
{
if (!keyDerivationAlgorithm.Algorithm.Equals(PkcsObjectIdentifiers.IdPbkdf2))
throw new ArgumentException("Unsupported key derivation algorithm: "
+ keyDerivationAlgorithm.Algorithm);
Pbkdf2Params kdfParams = Pbkdf2Params.GetInstance(keyDerivationAlgorithm.Parameters.ToAsn1Object());
this.password = password.ToArray();
this.salt = kdfParams.GetSalt();
this.iterationCount = kdfParams.IterationCount.IntValue;
}
#endif
~CmsPbeKey()
{
Array.Clear(this.password, 0, this.password.Length);
}
public byte[] Salt
{
get { return Arrays.Clone(salt); }
}
public int IterationCount
{
get { return iterationCount; }
}
public string Algorithm
{
get { return "PKCS5S2"; }
}
public string Format
{
get { return "RAW"; }
}
public byte[] GetEncoded()
{
return null;
}
internal abstract KeyParameter GetEncoded(string algorithmOid);
}
}
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