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using System;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Esf
{
/// <remarks>
/// <code>
/// OtherHash ::= CHOICE {
/// sha1Hash OtherHashValue, -- This contains a SHA-1 hash
/// otherHash OtherHashAlgAndValue
/// }
///
/// OtherHashValue ::= OCTET STRING
/// </code>
/// </remarks>
public class OtherHash
: Asn1Encodable, IAsn1Choice
{
public static OtherHash GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is OtherHash otherHash)
return otherHash;
if (obj is Asn1OctetString asn1OctetString)
return new OtherHash(asn1OctetString);
return new OtherHash(OtherHashAlgAndValue.GetInstance(obj));
}
public static OtherHash GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
Asn1Utilities.GetInstanceChoice(taggedObject, declaredExplicit, GetInstance);
public static OtherHash GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
Asn1Utilities.GetTaggedChoice(taggedObject, declaredExplicit, GetInstance);
private readonly Asn1OctetString m_sha1Hash;
private readonly OtherHashAlgAndValue m_otherHash;
public OtherHash(byte[] sha1Hash)
{
if (sha1Hash == null)
throw new ArgumentNullException(nameof(sha1Hash));
m_sha1Hash = new DerOctetString(sha1Hash);
}
public OtherHash(Asn1OctetString sha1Hash)
{
m_sha1Hash = sha1Hash ?? throw new ArgumentNullException(nameof(sha1Hash));
}
public OtherHash(OtherHashAlgAndValue otherHash)
{
m_otherHash = otherHash ?? throw new ArgumentNullException(nameof(otherHash));
}
public AlgorithmIdentifier HashAlgorithm =>
m_otherHash?.HashAlgorithm ?? new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1);
public byte[] GetHashValue() => m_otherHash?.GetHashValue() ?? m_sha1Hash.GetOctets();
public override Asn1Object ToAsn1Object() => m_otherHash?.ToAsn1Object() ?? m_sha1Hash;
}
}
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