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Diffstat (limited to 'crypto/src/asn1/x509/Holder.cs')
| -rw-r--r-- | crypto/src/asn1/x509/Holder.cs | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/Holder.cs b/crypto/src/asn1/x509/Holder.cs new file mode 100644 index 000000000..d04f1cb60 --- /dev/null +++ b/crypto/src/asn1/x509/Holder.cs @@ -0,0 +1,257 @@ +using System; + +namespace Org.BouncyCastle.Asn1.X509 +{ + /** + * The Holder object. + * <p> + * For an v2 attribute certificate this is: + * + * <pre> + * Holder ::= SEQUENCE { + * baseCertificateID [0] IssuerSerial OPTIONAL, + * -- the issuer and serial number of + * -- the holder's Public Key Certificate + * entityName [1] GeneralNames OPTIONAL, + * -- the name of the claimant or role + * objectDigestInfo [2] ObjectDigestInfo OPTIONAL + * -- used to directly authenticate the holder, + * -- for example, an executable + * } + * </pre> + * </p> + * <p> + * For an v1 attribute certificate this is: + * + * <pre> + * subject CHOICE { + * baseCertificateID [0] IssuerSerial, + * -- associated with a Public Key Certificate + * subjectName [1] GeneralNames }, + * -- associated with a name + * </pre> + * </p> + */ + public class Holder + : Asn1Encodable + { + internal readonly IssuerSerial baseCertificateID; + internal readonly GeneralNames entityName; + internal readonly ObjectDigestInfo objectDigestInfo; + private readonly int version; + + public static Holder GetInstance( + object obj) + { + if (obj is Holder) + { + return (Holder) obj; + } + + if (obj is Asn1Sequence) + { + return new Holder((Asn1Sequence) obj); + } + + if (obj is Asn1TaggedObject) + { + return new Holder((Asn1TaggedObject) obj); + } + + throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj"); + } + + /** + * Constructor for a holder for an v1 attribute certificate. + * + * @param tagObj The ASN.1 tagged holder object. + */ + public Holder( + Asn1TaggedObject tagObj) + { + switch (tagObj.TagNo) + { + case 0: + baseCertificateID = IssuerSerial.GetInstance(tagObj, false); + break; + case 1: + entityName = GeneralNames.GetInstance(tagObj, false); + break; + default: + throw new ArgumentException("unknown tag in Holder"); + } + + this.version = 0; + } + + /** + * Constructor for a holder for an v2 attribute certificate. * + * + * @param seq The ASN.1 sequence. + */ + private Holder( + Asn1Sequence seq) + { + if (seq.Count > 3) + throw new ArgumentException("Bad sequence size: " + seq.Count); + + for (int i = 0; i != seq.Count; i++) + { + Asn1TaggedObject tObj = Asn1TaggedObject.GetInstance(seq[i]); + + switch (tObj.TagNo) + { + case 0: + baseCertificateID = IssuerSerial.GetInstance(tObj, false); + break; + case 1: + entityName = GeneralNames.GetInstance(tObj, false); + break; + case 2: + objectDigestInfo = ObjectDigestInfo.GetInstance(tObj, false); + break; + default: + throw new ArgumentException("unknown tag in Holder"); + } + } + + this.version = 1; + } + + public Holder( + IssuerSerial baseCertificateID) + : this(baseCertificateID, 1) + { + } + + /** + * Constructs a holder from a IssuerSerial. + * @param baseCertificateID The IssuerSerial. + * @param version The version of the attribute certificate. + */ + public Holder( + IssuerSerial baseCertificateID, + int version) + { + this.baseCertificateID = baseCertificateID; + this.version = version; + } + + /** + * Returns 1 for v2 attribute certificates or 0 for v1 attribute + * certificates. + * @return The version of the attribute certificate. + */ + public int Version + { + get { return version; } + } + + /** + * Constructs a holder with an entityName for v2 attribute certificates or + * with a subjectName for v1 attribute certificates. + * + * @param entityName The entity or subject name. + */ + public Holder( + GeneralNames entityName) + : this(entityName, 1) + { + } + + /** + * Constructs a holder with an entityName for v2 attribute certificates or + * with a subjectName for v1 attribute certificates. + * + * @param entityName The entity or subject name. + * @param version The version of the attribute certificate. + */ + public Holder( + GeneralNames entityName, + int version) + { + this.entityName = entityName; + this.version = version; + } + + /** + * Constructs a holder from an object digest info. + * + * @param objectDigestInfo The object digest info object. + */ + public Holder( + ObjectDigestInfo objectDigestInfo) + { + this.objectDigestInfo = objectDigestInfo; + this.version = 1; + } + + public IssuerSerial BaseCertificateID + { + get { return baseCertificateID; } + } + + /** + * Returns the entityName for an v2 attribute certificate or the subjectName + * for an v1 attribute certificate. + * + * @return The entityname or subjectname. + */ + public GeneralNames EntityName + { + get { return entityName; } + } + + public ObjectDigestInfo ObjectDigestInfo + { + get { return objectDigestInfo; } + } + + /** + * The Holder object. + * <pre> + * Holder ::= Sequence { + * baseCertificateID [0] IssuerSerial OPTIONAL, + * -- the issuer and serial number of + * -- the holder's Public Key Certificate + * entityName [1] GeneralNames OPTIONAL, + * -- the name of the claimant or role + * objectDigestInfo [2] ObjectDigestInfo OPTIONAL + * -- used to directly authenticate the holder, + * -- for example, an executable + * } + * </pre> + */ + public override Asn1Object ToAsn1Object() + { + if (version == 1) + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + if (baseCertificateID != null) + { + v.Add(new DerTaggedObject(false, 0, baseCertificateID)); + } + + if (entityName != null) + { + v.Add(new DerTaggedObject(false, 1, entityName)); + } + + if (objectDigestInfo != null) + { + v.Add(new DerTaggedObject(false, 2, objectDigestInfo)); + } + + return new DerSequence(v); + } + + if (entityName != null) + { + return new DerTaggedObject(false, 1, entityName); + } + + return new DerTaggedObject(false, 0, baseCertificateID); + } + } +} |