98 lines
3.0 KiB
C#
98 lines
3.0 KiB
C#
using System;
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using Org.BouncyCastle.Asn1.Oiw;
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using Org.BouncyCastle.Asn1.X509;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Asn1.Pkcs;
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public class RsaesOaepParameters : Asn1Encodable
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{
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private AlgorithmIdentifier hashAlgorithm;
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private AlgorithmIdentifier maskGenAlgorithm;
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private AlgorithmIdentifier pSourceAlgorithm;
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public static readonly AlgorithmIdentifier DefaultHashAlgorithm = new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1, DerNull.Instance);
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public static readonly AlgorithmIdentifier DefaultMaskGenFunction = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, DefaultHashAlgorithm);
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public static readonly AlgorithmIdentifier DefaultPSourceAlgorithm = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdPSpecified, new DerOctetString(new byte[0]));
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public AlgorithmIdentifier HashAlgorithm => hashAlgorithm;
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public AlgorithmIdentifier MaskGenAlgorithm => maskGenAlgorithm;
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public AlgorithmIdentifier PSourceAlgorithm => pSourceAlgorithm;
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public static RsaesOaepParameters GetInstance(object obj)
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{
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if (obj is RsaesOaepParameters)
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{
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return (RsaesOaepParameters)obj;
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}
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if (obj is Asn1Sequence)
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{
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return new RsaesOaepParameters((Asn1Sequence)obj);
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}
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throw new ArgumentException("Unknown object in factory: " + Platform.GetTypeName(obj), "obj");
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}
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public RsaesOaepParameters()
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{
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hashAlgorithm = DefaultHashAlgorithm;
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maskGenAlgorithm = DefaultMaskGenFunction;
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pSourceAlgorithm = DefaultPSourceAlgorithm;
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}
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public RsaesOaepParameters(AlgorithmIdentifier hashAlgorithm, AlgorithmIdentifier maskGenAlgorithm, AlgorithmIdentifier pSourceAlgorithm)
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{
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this.hashAlgorithm = hashAlgorithm;
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this.maskGenAlgorithm = maskGenAlgorithm;
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this.pSourceAlgorithm = pSourceAlgorithm;
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}
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public RsaesOaepParameters(Asn1Sequence seq)
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{
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hashAlgorithm = DefaultHashAlgorithm;
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maskGenAlgorithm = DefaultMaskGenFunction;
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pSourceAlgorithm = DefaultPSourceAlgorithm;
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for (int i = 0; i != seq.Count; i++)
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{
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Asn1TaggedObject asn1TaggedObject = (Asn1TaggedObject)seq[i];
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switch (asn1TaggedObject.TagNo)
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{
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case 0:
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hashAlgorithm = AlgorithmIdentifier.GetInstance(asn1TaggedObject, explicitly: true);
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break;
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case 1:
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maskGenAlgorithm = AlgorithmIdentifier.GetInstance(asn1TaggedObject, explicitly: true);
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break;
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case 2:
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pSourceAlgorithm = AlgorithmIdentifier.GetInstance(asn1TaggedObject, explicitly: true);
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break;
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default:
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throw new ArgumentException("unknown tag");
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}
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}
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}
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public override Asn1Object ToAsn1Object()
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{
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Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
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if (!hashAlgorithm.Equals(DefaultHashAlgorithm))
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{
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asn1EncodableVector.Add(new DerTaggedObject(explicitly: true, 0, hashAlgorithm));
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}
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if (!maskGenAlgorithm.Equals(DefaultMaskGenFunction))
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{
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asn1EncodableVector.Add(new DerTaggedObject(explicitly: true, 1, maskGenAlgorithm));
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}
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if (!pSourceAlgorithm.Equals(DefaultPSourceAlgorithm))
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{
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asn1EncodableVector.Add(new DerTaggedObject(explicitly: true, 2, pSourceAlgorithm));
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}
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return new DerSequence(asn1EncodableVector);
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}
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}
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