/// <summary>
/// Возвращает открытый ключ сертификата.
/// </summary>
public static AsymmetricAlgorithm GetPublicKeyAlgorithm(this X509Certificate2 certificate)
{
if (certificate.IsGost_R3410_2012_512())
{
var publicKey = new Gost_R3410_2012_512_AsymmetricAlgorithm();
var encodedParameters = certificate.PublicKey.EncodedParameters.RawData;
var encodedKeyValue = certificate.PublicKey.EncodedKeyValue.RawData;
publicKey.ImportCspBlob(encodedParameters, encodedKeyValue);
return(publicKey);
}
if (certificate.IsGost_R3410_2012_256())
{
var publicKey = new Gost_R3410_2012_256_AsymmetricAlgorithm();
var encodedParameters = certificate.PublicKey.EncodedParameters.RawData;
var encodedKeyValue = certificate.PublicKey.EncodedKeyValue.RawData;
publicKey.ImportCspBlob(encodedParameters, encodedKeyValue);
return(publicKey);
}
if (certificate.IsGost_R3410_2001())
{
var publicKey = new Gost_R3410_2001_AsymmetricAlgorithm();
var encodedParameters = certificate.PublicKey.EncodedParameters.RawData;
var encodedKeyValue = certificate.PublicKey.EncodedKeyValue.RawData;
publicKey.ImportCspBlob(encodedParameters, encodedKeyValue);
return(publicKey);
}
return(certificate.PublicKey.Key);
}
/// <summary>
/// Возвращает <see langword="true"/> для сертификатов ГОСТ.
/// </summary>
public static bool IsGost(this X509Certificate2 certificate)
{
return(certificate.IsGost_R3410_2012_512() ||
certificate.IsGost_R3410_2012_256() ||
certificate.IsGost_R3410_2001() ||
certificate.IsGost_R3410_94());
}
/// <summary>
/// Возвращает закрытый ключ сертификата.
/// </summary>
public static AsymmetricAlgorithm GetPrivateKeyAlgorithm(this X509Certificate2 certificate)
{
if (certificate.IsGost_R3410_2012_512())
{
var cspParameters = GetPrivateKeyInfo(certificate);
return(new Gost_R3410_2012_512_AsymmetricAlgorithm(cspParameters));
}
if (certificate.IsGost_R3410_2012_256())
{
var cspParameters = GetPrivateKeyInfo(certificate);
return(new Gost_R3410_2012_256_AsymmetricAlgorithm(cspParameters));
}
if (certificate.IsGost_R3410_2001())
{
var cspParameters = GetPrivateKeyInfo(certificate);
return(new Gost_R3410_2001_AsymmetricAlgorithm(cspParameters));
}
return(certificate.PrivateKey);
}
/// <summary>
/// Возвращает <see cref="Oid"/> функции хэширования сертификата.
/// </summary>
/// <param name="certificate"></param>
/// <returns></returns>
public static Oid GetHashAlgorithm(this X509Certificate2 certificate)
{
if (certificate.IsGost_R3410_2012_512())
{
return(Gost_R3410_2012_512_Constants.HashAlgorithm.ToOid());
}
if (certificate.IsGost_R3410_2012_256())
{
return(Gost_R3410_2012_256_Constants.HashAlgorithm.ToOid());
}
if (certificate.IsGost_R3410_2001())
{
return(Gost_R3410_2001_Constants.HashAlgorithm.ToOid());
}
if (certificate.IsGost_R3410_94())
{
return(Gost_R3410_94_Constants.HashAlgorithm.ToOid());
}
return(null);
}
