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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Cms
{
public class PasswordRecipientInfo
: Asn1Encodable
{
public static PasswordRecipientInfo GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is PasswordRecipientInfo passwordRecipientInfo)
return passwordRecipientInfo;
#pragma warning disable CS0618 // Type or member is obsolete
return new PasswordRecipientInfo(Asn1Sequence.GetInstance(obj));
#pragma warning restore CS0618 // Type or member is obsolete
}
public static PasswordRecipientInfo GetInstance(Asn1TaggedObject obj, bool explicitly)
{
#pragma warning disable CS0618 // Type or member is obsolete
return new PasswordRecipientInfo(Asn1Sequence.GetInstance(obj, explicitly));
#pragma warning restore CS0618 // Type or member is obsolete
}
private readonly DerInteger m_version;
private readonly AlgorithmIdentifier m_keyDerivationAlgorithm;
private readonly AlgorithmIdentifier m_keyEncryptionAlgorithm;
private readonly Asn1OctetString m_encryptedKey;
public PasswordRecipientInfo(AlgorithmIdentifier keyEncryptionAlgorithm, Asn1OctetString encryptedKey)
: this(keyDerivationAlgorithm: null, keyEncryptionAlgorithm, encryptedKey)
{
}
public PasswordRecipientInfo(AlgorithmIdentifier keyDerivationAlgorithm,
AlgorithmIdentifier keyEncryptionAlgorithm, Asn1OctetString encryptedKey)
{
m_version = DerInteger.Zero;
m_keyDerivationAlgorithm = keyDerivationAlgorithm;
m_keyEncryptionAlgorithm = keyEncryptionAlgorithm ?? throw new ArgumentNullException(nameof(keyEncryptionAlgorithm));
m_encryptedKey = encryptedKey ?? throw new ArgumentNullException(nameof(encryptedKey));
}
[Obsolete("Use 'GetInstance' instead")]
public PasswordRecipientInfo(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 3 || count > 4)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_version = DerInteger.GetInstance(seq[pos++]);
m_keyDerivationAlgorithm = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 0, false,
AlgorithmIdentifier.GetTagged);
m_keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[pos++]);
m_encryptedKey = Asn1OctetString.GetInstance(seq[pos++]);
}
public DerInteger Version => m_version;
public AlgorithmIdentifier KeyDerivationAlgorithm => m_keyDerivationAlgorithm;
public AlgorithmIdentifier KeyEncryptionAlgorithm => m_keyEncryptionAlgorithm;
public Asn1OctetString EncryptedKey => m_encryptedKey;
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* PasswordRecipientInfo ::= Sequence {
* version CMSVersion, -- Always set to 0
* keyDerivationAlgorithm [0] KeyDerivationAlgorithmIdentifier
* OPTIONAL,
* keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier,
* encryptedKey EncryptedKey }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
if (m_keyDerivationAlgorithm == null)
return new DerSequence(m_version, m_keyEncryptionAlgorithm, m_encryptedKey);
return new DerSequence(m_version, new DerTaggedObject(false, 0, m_keyDerivationAlgorithm),
m_keyEncryptionAlgorithm, m_encryptedKey);
}
}
}
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