using System; namespace Org.BouncyCastle.Asn1.X509 { /** * X.509 Section 9.8.4. *
* This extension may be used as a public-key certificate extension, a CRL extension or an AVL extension. * This alternative signature shall be created by the issuer using its alternative private key, and it shall be verified using the * alternative public key of the issuer. *
     * altSignatureValue EXTENSION ::= {
     *     SYNTAX AltSignatureValue
     *     IDENTIFIED BY id-ce-altSignatureValue }
     *
     * AltSignatureValue ::= BIT STRING
     * 
* This extension can only be created by a signer holding a multiple cryptographic algorithms public-key certificate. When * creating the alternative digital signature on an issued public-key certificate or CRL, the signer shall use its alternative * private key. *
* The procedures for creating and validating alternative digital signatures are specified in: * */ public class AltSignatureValue : Asn1Encodable { private readonly DerBitString m_signature; public static AltSignatureValue GetInstance(object obj) { if (obj == null) return null; if (obj is AltSignatureValue altSignatureValue) return altSignatureValue; return new AltSignatureValue(DerBitString.GetInstance(obj)); } public static AltSignatureValue GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) { return GetInstance(DerBitString.GetInstance(taggedObject, declaredExplicit)); } public static AltSignatureValue FromExtensions(X509Extensions extensions) { return GetInstance(X509Extensions.GetExtensionParsedValue(extensions, X509Extensions.AltSignatureValue)); } private AltSignatureValue(DerBitString signature) { m_signature = signature; } public AltSignatureValue(byte[] signature) { m_signature = new DerBitString(signature); } public DerBitString Signature => m_signature; public override Asn1Object ToAsn1Object() { return m_signature; } } }