using Renci.SshNet.Common; using Renci.SshNet.Security.Cryptography; using System; namespace Renci.SshNet.Security { public class RsaKey : Key, IDisposable { private RsaDigitalSignature _digitalSignature; private bool _isDisposed; public BigInteger Modulus => _privateKey[0]; public BigInteger Exponent => _privateKey[1]; public BigInteger D { get { if (_privateKey.Length > 2) return _privateKey[2]; return BigInteger.Zero; } } public BigInteger P { get { if (_privateKey.Length > 3) return _privateKey[3]; return BigInteger.Zero; } } public BigInteger Q { get { if (_privateKey.Length > 4) return _privateKey[4]; return BigInteger.Zero; } } public BigInteger DP { get { if (_privateKey.Length > 5) return _privateKey[5]; return BigInteger.Zero; } } public BigInteger DQ { get { if (_privateKey.Length > 6) return _privateKey[6]; return BigInteger.Zero; } } public BigInteger InverseQ { get { if (_privateKey.Length > 7) return _privateKey[7]; return BigInteger.Zero; } } public override int KeyLength => Modulus.BitLength; protected override DigitalSignature DigitalSignature { get { if (_digitalSignature == null) _digitalSignature = new RsaDigitalSignature(this); return _digitalSignature; } } public override BigInteger[] Public { get { return new BigInteger[2] { Exponent, Modulus }; } set { if (value.Length != 2) throw new InvalidOperationException("Invalid private key."); _privateKey = new BigInteger[2] { value[1], value[0] }; } } public RsaKey() { } public RsaKey(byte[] data) : base(data) { if (_privateKey.Length != 8) throw new InvalidOperationException("Invalid private key."); } public RsaKey(BigInteger modulus, BigInteger exponent, BigInteger d, BigInteger p, BigInteger q, BigInteger inverseQ) { _privateKey = new BigInteger[8]; _privateKey[0] = modulus; _privateKey[1] = exponent; _privateKey[2] = d; _privateKey[3] = p; _privateKey[4] = q; _privateKey[5] = PrimeExponent(d, p); _privateKey[6] = PrimeExponent(d, q); _privateKey[7] = inverseQ; } private static BigInteger PrimeExponent(BigInteger privateExponent, BigInteger prime) { BigInteger divisor = prime - new BigInteger(1); return privateExponent % divisor; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!_isDisposed && disposing) { RsaDigitalSignature digitalSignature = _digitalSignature; if (digitalSignature != null) { digitalSignature.Dispose(); _digitalSignature = null; } _isDisposed = true; } } ~RsaKey() { Dispose(false); } } }