72 lines
1.8 KiB
C#
72 lines
1.8 KiB
C#
using System;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Asn1.X509;
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public class RsaPublicKeyStructure : Asn1Encodable
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{
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private BigInteger modulus;
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private BigInteger publicExponent;
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public BigInteger Modulus => modulus;
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public BigInteger PublicExponent => publicExponent;
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public static RsaPublicKeyStructure GetInstance(Asn1TaggedObject obj, bool explicitly)
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{
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return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
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}
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public static RsaPublicKeyStructure GetInstance(object obj)
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{
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if (obj == null || obj is RsaPublicKeyStructure)
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{
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return (RsaPublicKeyStructure)obj;
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}
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if (obj is Asn1Sequence)
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{
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return new RsaPublicKeyStructure((Asn1Sequence)obj);
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}
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throw new ArgumentException("Invalid RsaPublicKeyStructure: " + Platform.GetTypeName(obj));
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}
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public RsaPublicKeyStructure(BigInteger modulus, BigInteger publicExponent)
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{
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if (modulus == null)
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{
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throw new ArgumentNullException("modulus");
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}
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if (publicExponent == null)
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{
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throw new ArgumentNullException("publicExponent");
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}
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if (modulus.SignValue <= 0)
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{
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throw new ArgumentException("Not a valid RSA modulus", "modulus");
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}
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if (publicExponent.SignValue <= 0)
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{
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throw new ArgumentException("Not a valid RSA public exponent", "publicExponent");
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}
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this.modulus = modulus;
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this.publicExponent = publicExponent;
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}
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private RsaPublicKeyStructure(Asn1Sequence seq)
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{
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if (seq.Count != 2)
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{
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throw new ArgumentException("Bad sequence size: " + seq.Count);
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}
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modulus = DerInteger.GetInstance(seq[0]).PositiveValue;
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publicExponent = DerInteger.GetInstance(seq[1]).PositiveValue;
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}
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public override Asn1Object ToAsn1Object()
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{
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return new DerSequence(new DerInteger(Modulus), new DerInteger(PublicExponent));
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}
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}
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