88 lines
1.8 KiB
C#
88 lines
1.8 KiB
C#
using System;
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using Org.BouncyCastle.Math;
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namespace Org.BouncyCastle.Bcpg;
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public class RsaSecretBcpgKey : BcpgObject, IBcpgKey
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{
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private readonly MPInteger d;
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private readonly MPInteger p;
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private readonly MPInteger q;
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private readonly MPInteger u;
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private readonly BigInteger expP;
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private readonly BigInteger expQ;
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private readonly BigInteger crt;
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public BigInteger Modulus => p.Value.Multiply(q.Value);
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public BigInteger PrivateExponent => d.Value;
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public BigInteger PrimeP => p.Value;
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public BigInteger PrimeQ => q.Value;
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public BigInteger PrimeExponentP => expP;
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public BigInteger PrimeExponentQ => expQ;
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public BigInteger CrtCoefficient => crt;
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public string Format => "PGP";
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public RsaSecretBcpgKey(BcpgInputStream bcpgIn)
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{
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d = new MPInteger(bcpgIn);
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p = new MPInteger(bcpgIn);
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q = new MPInteger(bcpgIn);
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u = new MPInteger(bcpgIn);
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expP = d.Value.Remainder(p.Value.Subtract(BigInteger.One));
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expQ = d.Value.Remainder(q.Value.Subtract(BigInteger.One));
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crt = q.Value.ModInverse(p.Value);
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}
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public RsaSecretBcpgKey(BigInteger d, BigInteger p, BigInteger q)
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{
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int num = p.CompareTo(q);
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if (num >= 0)
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{
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if (num == 0)
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{
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throw new ArgumentException("p and q cannot be equal");
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}
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BigInteger bigInteger = p;
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p = q;
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q = bigInteger;
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}
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this.d = new MPInteger(d);
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this.p = new MPInteger(p);
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this.q = new MPInteger(q);
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u = new MPInteger(p.ModInverse(q));
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expP = d.Remainder(p.Subtract(BigInteger.One));
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expQ = d.Remainder(q.Subtract(BigInteger.One));
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crt = q.ModInverse(p);
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}
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public override byte[] GetEncoded()
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{
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try
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{
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return base.GetEncoded();
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}
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catch (Exception)
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{
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return null;
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}
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}
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public override void Encode(BcpgOutputStream bcpgOut)
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{
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bcpgOut.WriteObjects(d, p, q, u);
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}
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}
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