SignatureDescription.cs

Go to the documentation of this file.

using System.Diagnostics.CodeAnalysis;
using System.Runtime.Versioning;
 
namespace System.Security.Cryptography;
 
[UnsupportedOSPlatform("browser")]
public class SignatureDescription
{
    public string? KeyAlgorithm { get; set; }
 
    public string? DigestAlgorithm { get; set; }
 
    public string? FormatterAlgorithm { get; set; }
 
    public string? DeformatterAlgorithm { get; set; }
 
    public SignatureDescription()
    {
    }
 
    public SignatureDescription(SecurityElement el)
    {
        if (el == null)
        {
            throw new ArgumentNullException("el");
        }
        KeyAlgorithm = el.SearchForTextOfTag("Key");
        DigestAlgorithm = el.SearchForTextOfTag("Digest");
        FormatterAlgorithm = el.SearchForTextOfTag("Formatter");
        DeformatterAlgorithm = el.SearchForTextOfTag("Deformatter");
    }
 
    [RequiresUnreferencedCode("CreateDeformatter is not trim compatible because the algorithm implementation referenced by DeformatterAlgorithm might be removed.")]
    public virtual AsymmetricSignatureDeformatter CreateDeformatter(AsymmetricAlgorithm key)
    {
        AsymmetricSignatureDeformatter asymmetricSignatureDeformatter = (AsymmetricSignatureDeformatter)CryptoConfig.CreateFromName(DeformatterAlgorithm);
        asymmetricSignatureDeformatter.SetKey(key);
        return asymmetricSignatureDeformatter;
    }
 
    [RequiresUnreferencedCode("CreateFormatter is not trim compatible because the algorithm implementation referenced by FormatterAlgorithm might be removed.")]
    public virtual AsymmetricSignatureFormatter CreateFormatter(AsymmetricAlgorithm key)
    {
        AsymmetricSignatureFormatter asymmetricSignatureFormatter = (AsymmetricSignatureFormatter)CryptoConfig.CreateFromName(FormatterAlgorithm);
        asymmetricSignatureFormatter.SetKey(key);
        return asymmetricSignatureFormatter;
    }
 
    [RequiresUnreferencedCode("CreateDigest is not trim compatible because the algorithm implementation referenced by DigestAlgorithm might be removed.")]
    public virtual HashAlgorithm? CreateDigest()
    {
        return (HashAlgorithm)CryptoConfig.CreateFromName(DigestAlgorithm);
    }
}