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using System;
#if NET5_0_OR_GREATER
using System.Runtime.Versioning;
#endif
using System.Security.Cryptography;
using SystemX509 = System.Security.Cryptography.X509Certificates;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.X509;
namespace Org.BouncyCastle.Security
{
/// <summary>
/// A class containing methods to interface the BouncyCastle world to the .NET Crypto world.
/// </summary>
#if NET5_0_OR_GREATER
[SupportedOSPlatform("windows")]
#endif
public static class DotNetUtilities
{
/// <summary>
/// Create an System.Security.Cryptography.X509Certificate from an X509Certificate Structure.
/// </summary>
/// <param name="x509Struct"></param>
/// <returns>A System.Security.Cryptography.X509Certificate.</returns>
public static SystemX509.X509Certificate ToX509Certificate(
X509CertificateStructure x509Struct)
{
return new SystemX509.X509Certificate(x509Struct.GetDerEncoded());
}
public static SystemX509.X509Certificate ToX509Certificate(
X509Certificate x509Cert)
{
return new SystemX509.X509Certificate(x509Cert.GetEncoded());
}
public static X509Certificate FromX509Certificate(
SystemX509.X509Certificate x509Cert)
{
return new X509CertificateParser().ReadCertificate(x509Cert.GetRawCertData());
}
public static AsymmetricCipherKeyPair GetDsaKeyPair(DSA dsa)
{
return GetDsaKeyPair(dsa.ExportParameters(true));
}
public static AsymmetricCipherKeyPair GetDsaKeyPair(DSAParameters dp)
{
DsaValidationParameters validationParameters = (dp.Seed != null)
? new DsaValidationParameters(dp.Seed, dp.Counter)
: null;
DsaParameters parameters = new DsaParameters(
new BigInteger(1, dp.P),
new BigInteger(1, dp.Q),
new BigInteger(1, dp.G),
validationParameters);
DsaPublicKeyParameters pubKey = new DsaPublicKeyParameters(
new BigInteger(1, dp.Y),
parameters);
DsaPrivateKeyParameters privKey = new DsaPrivateKeyParameters(
new BigInteger(1, dp.X),
parameters);
return new AsymmetricCipherKeyPair(pubKey, privKey);
}
public static DsaPublicKeyParameters GetDsaPublicKey(DSA dsa)
{
return GetDsaPublicKey(dsa.ExportParameters(false));
}
public static DsaPublicKeyParameters GetDsaPublicKey(DSAParameters dp)
{
DsaValidationParameters validationParameters = (dp.Seed != null)
? new DsaValidationParameters(dp.Seed, dp.Counter)
: null;
DsaParameters parameters = new DsaParameters(
new BigInteger(1, dp.P),
new BigInteger(1, dp.Q),
new BigInteger(1, dp.G),
validationParameters);
return new DsaPublicKeyParameters(
new BigInteger(1, dp.Y),
parameters);
}
public static AsymmetricCipherKeyPair GetRsaKeyPair(RSA rsa)
{
return GetRsaKeyPair(rsa.ExportParameters(true));
}
public static AsymmetricCipherKeyPair GetRsaKeyPair(RSAParameters rp)
{
BigInteger modulus = new BigInteger(1, rp.Modulus);
BigInteger pubExp = new BigInteger(1, rp.Exponent);
RsaKeyParameters pubKey = new RsaKeyParameters(
false,
modulus,
pubExp);
RsaPrivateCrtKeyParameters privKey = new RsaPrivateCrtKeyParameters(
modulus,
pubExp,
new BigInteger(1, rp.D),
new BigInteger(1, rp.P),
new BigInteger(1, rp.Q),
new BigInteger(1, rp.DP),
new BigInteger(1, rp.DQ),
new BigInteger(1, rp.InverseQ));
return new AsymmetricCipherKeyPair(pubKey, privKey);
}
public static RsaKeyParameters GetRsaPublicKey(RSA rsa)
{
return GetRsaPublicKey(rsa.ExportParameters(false));
}
public static RsaKeyParameters GetRsaPublicKey(
RSAParameters rp)
{
return new RsaKeyParameters(
false,
new BigInteger(1, rp.Modulus),
new BigInteger(1, rp.Exponent));
}
public static AsymmetricCipherKeyPair GetKeyPair(AsymmetricAlgorithm privateKey)
{
if (privateKey is DSA)
{
return GetDsaKeyPair((DSA)privateKey);
}
if (privateKey is RSA)
{
return GetRsaKeyPair((RSA)privateKey);
}
throw new ArgumentException("Unsupported algorithm specified", "privateKey");
}
public static RSA ToRSA(RsaKeyParameters rsaKey)
{
// TODO This appears to not work for private keys (when no CRT info)
return CreateRSAProvider(ToRSAParameters(rsaKey));
}
public static RSA ToRSA(RsaKeyParameters rsaKey, CspParameters csp)
{
// TODO This appears to not work for private keys (when no CRT info)
return CreateRSAProvider(ToRSAParameters(rsaKey), csp);
}
public static RSA ToRSA(RsaPrivateCrtKeyParameters privKey)
{
return CreateRSAProvider(ToRSAParameters(privKey));
}
public static RSA ToRSA(RsaPrivateCrtKeyParameters privKey, CspParameters csp)
{
return CreateRSAProvider(ToRSAParameters(privKey), csp);
}
public static RSA ToRSA(RsaPrivateKeyStructure privKey)
{
return CreateRSAProvider(ToRSAParameters(privKey));
}
public static RSA ToRSA(RsaPrivateKeyStructure privKey, CspParameters csp)
{
return CreateRSAProvider(ToRSAParameters(privKey), csp);
}
public static RSAParameters ToRSAParameters(RsaKeyParameters rsaKey)
{
RSAParameters rp = new RSAParameters();
rp.Modulus = rsaKey.Modulus.ToByteArrayUnsigned();
if (rsaKey.IsPrivate)
rp.D = ConvertRSAParametersField(rsaKey.Exponent, rp.Modulus.Length);
else
rp.Exponent = rsaKey.Exponent.ToByteArrayUnsigned();
return rp;
}
public static RSAParameters ToRSAParameters(RsaPrivateCrtKeyParameters privKey)
{
RSAParameters rp = new RSAParameters();
rp.Modulus = privKey.Modulus.ToByteArrayUnsigned();
rp.Exponent = privKey.PublicExponent.ToByteArrayUnsigned();
rp.P = privKey.P.ToByteArrayUnsigned();
rp.Q = privKey.Q.ToByteArrayUnsigned();
rp.D = ConvertRSAParametersField(privKey.Exponent, rp.Modulus.Length);
rp.DP = ConvertRSAParametersField(privKey.DP, rp.P.Length);
rp.DQ = ConvertRSAParametersField(privKey.DQ, rp.Q.Length);
rp.InverseQ = ConvertRSAParametersField(privKey.QInv, rp.Q.Length);
return rp;
}
public static RSAParameters ToRSAParameters(RsaPrivateKeyStructure privKey)
{
RSAParameters rp = new RSAParameters();
rp.Modulus = privKey.Modulus.ToByteArrayUnsigned();
rp.Exponent = privKey.PublicExponent.ToByteArrayUnsigned();
rp.P = privKey.Prime1.ToByteArrayUnsigned();
rp.Q = privKey.Prime2.ToByteArrayUnsigned();
rp.D = ConvertRSAParametersField(privKey.PrivateExponent, rp.Modulus.Length);
rp.DP = ConvertRSAParametersField(privKey.Exponent1, rp.P.Length);
rp.DQ = ConvertRSAParametersField(privKey.Exponent2, rp.Q.Length);
rp.InverseQ = ConvertRSAParametersField(privKey.Coefficient, rp.Q.Length);
return rp;
}
private static byte[] ConvertRSAParametersField(BigInteger n, int size)
{
return BigIntegers.AsUnsignedByteArray(size, n);
}
private static RSACryptoServiceProvider CreateRSAProvider(RSAParameters rp)
{
CspParameters csp = new CspParameters();
csp.KeyContainerName = string.Format("BouncyCastle-{0}", Guid.NewGuid());
return CreateRSAProvider(rp, csp);
}
private static RSACryptoServiceProvider CreateRSAProvider(RSAParameters rp, CspParameters csp)
{
RSACryptoServiceProvider rsaCsp = new RSACryptoServiceProvider(csp);
rsaCsp.ImportParameters(rp);
return rsaCsp;
}
}
}
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