122 lines
3.6 KiB
C#
122 lines
3.6 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Math;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.Sec
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{
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/**
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* the elliptic curve private key object from SEC 1
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*/
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public class ECPrivateKeyStructure
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: Asn1Encodable
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{
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private readonly Asn1Sequence m_seq;
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public static ECPrivateKeyStructure GetInstance(object obj)
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{
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if (obj == null)
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return null;
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if (obj is ECPrivateKeyStructure ecPrivateKeyStructure)
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return ecPrivateKeyStructure;
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return new ECPrivateKeyStructure(Asn1Sequence.GetInstance(obj));
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}
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private ECPrivateKeyStructure(Asn1Sequence seq)
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{
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m_seq = seq ?? throw new ArgumentNullException(nameof(seq));
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}
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public ECPrivateKeyStructure(
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int orderBitLength,
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BigInteger key)
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: this(orderBitLength, key, null)
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{
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}
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public ECPrivateKeyStructure(
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int orderBitLength,
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BigInteger key,
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Asn1Encodable parameters)
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: this(orderBitLength, key, null, parameters)
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{
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}
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public ECPrivateKeyStructure(
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int orderBitLength,
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BigInteger key,
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DerBitString publicKey,
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Asn1Encodable parameters)
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{
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if (key == null)
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throw new ArgumentNullException(nameof(key));
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if (orderBitLength < key.BitLength)
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throw new ArgumentException("must be >= key bitlength", nameof(orderBitLength));
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byte[] bytes = BigIntegers.AsUnsignedByteArray((orderBitLength + 7) / 8, key);
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Asn1EncodableVector v = new Asn1EncodableVector(
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new DerInteger(1),
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new DerOctetString(bytes));
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v.AddOptionalTagged(true, 0, parameters);
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v.AddOptionalTagged(true, 1, publicKey);
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m_seq = new DerSequence(v);
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}
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public virtual BigInteger GetKey()
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{
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Asn1OctetString octs = (Asn1OctetString)m_seq[1];
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return new BigInteger(1, octs.GetOctets());
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}
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public virtual DerBitString GetPublicKey()
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{
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return (DerBitString)GetObjectInTag(1, Asn1Tags.BitString);
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}
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public virtual Asn1Object GetParameters()
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{
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return GetObjectInTag(0, -1);
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}
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private Asn1Object GetObjectInTag(int tagNo, int baseTagNo)
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{
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foreach (Asn1Encodable ae in m_seq)
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{
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Asn1Object obj = ae.ToAsn1Object();
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if (obj is Asn1TaggedObject tag)
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{
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if (tag.HasContextTag(tagNo))
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{
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return baseTagNo < 0
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? tag.GetExplicitBaseObject().ToAsn1Object()
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: tag.GetBaseUniversal(true, baseTagNo);
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}
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}
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}
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return null;
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}
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/**
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* ECPrivateKey ::= SEQUENCE {
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* version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
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* privateKey OCTET STRING,
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* parameters [0] Parameters OPTIONAL,
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* publicKey [1] BIT STRING OPTIONAL }
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*/
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public override Asn1Object ToAsn1Object()
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{
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return m_seq;
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}
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}
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}
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#pragma warning restore
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#endif
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