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using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Pkcs
{
/**
* a Pkcs#7 signer info object.
*/
public class SignerInfo
: Asn1Encodable
{
private DerInteger version;
private IssuerAndSerialNumber issuerAndSerialNumber;
private AlgorithmIdentifier digAlgorithm;
private Asn1Set authenticatedAttributes;
private AlgorithmIdentifier digEncryptionAlgorithm;
private Asn1OctetString encryptedDigest;
private Asn1Set unauthenticatedAttributes;
public static SignerInfo GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is SignerInfo signerInfo)
return signerInfo;
return new SignerInfo(Asn1Sequence.GetInstance(obj));
}
public SignerInfo(
DerInteger version,
IssuerAndSerialNumber issuerAndSerialNumber,
AlgorithmIdentifier digAlgorithm,
Asn1Set authenticatedAttributes,
AlgorithmIdentifier digEncryptionAlgorithm,
Asn1OctetString encryptedDigest,
Asn1Set unauthenticatedAttributes)
{
this.version = version;
this.issuerAndSerialNumber = issuerAndSerialNumber;
this.digAlgorithm = digAlgorithm;
this.authenticatedAttributes = authenticatedAttributes;
this.digEncryptionAlgorithm = digEncryptionAlgorithm;
this.encryptedDigest = encryptedDigest;
this.unauthenticatedAttributes = unauthenticatedAttributes;
}
public SignerInfo(
Asn1Sequence seq)
{
var e = seq.GetEnumerator();
e.MoveNext();
version = (DerInteger) e.Current;
e.MoveNext();
issuerAndSerialNumber = IssuerAndSerialNumber.GetInstance(e.Current);
e.MoveNext();
digAlgorithm = AlgorithmIdentifier.GetInstance(e.Current);
e.MoveNext();
var obj = e.Current;
if (obj is Asn1TaggedObject tagged)
{
authenticatedAttributes = Asn1Set.GetInstance(tagged, false);
e.MoveNext();
digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(e.Current);
}
else
{
authenticatedAttributes = null;
digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(obj);
}
e.MoveNext();
encryptedDigest = DerOctetString.GetInstance(e.Current);
if (e.MoveNext())
{
unauthenticatedAttributes = Asn1Set.GetInstance((Asn1TaggedObject)e.Current, false);
}
else
{
unauthenticatedAttributes = null;
}
}
public DerInteger Version { get { return version; } }
public IssuerAndSerialNumber IssuerAndSerialNumber { get { return issuerAndSerialNumber; } }
public Asn1Set AuthenticatedAttributes { get { return authenticatedAttributes; } }
public AlgorithmIdentifier DigestAlgorithm { get { return digAlgorithm; } }
public Asn1OctetString EncryptedDigest { get { return encryptedDigest; } }
public AlgorithmIdentifier DigestEncryptionAlgorithm { get { return digEncryptionAlgorithm; } }
public Asn1Set UnauthenticatedAttributes { get { return unauthenticatedAttributes; } }
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* SignerInfo ::= Sequence {
* version Version,
* issuerAndSerialNumber IssuerAndSerialNumber,
* digestAlgorithm DigestAlgorithmIdentifier,
* authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
* digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
* encryptedDigest EncryptedDigest,
* unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
* }
*
* EncryptedDigest ::= OCTET STRING
*
* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
*
* DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(version, issuerAndSerialNumber, digAlgorithm);
v.AddOptionalTagged(false, 0, authenticatedAttributes);
v.Add(digEncryptionAlgorithm, encryptedDigest);
v.AddOptionalTagged(false, 1, unauthenticatedAttributes);
return new DerSequence(v);
}
}
}
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