diff options
Diffstat (limited to 'Crypto/src/asn1/x509/AuthorityKeyIdentifier.cs')
| -rw-r--r-- | Crypto/src/asn1/x509/AuthorityKeyIdentifier.cs | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/AuthorityKeyIdentifier.cs b/Crypto/src/asn1/x509/AuthorityKeyIdentifier.cs new file mode 100644 index 000000000..12ccacfc7 --- /dev/null +++ b/Crypto/src/asn1/x509/AuthorityKeyIdentifier.cs @@ -0,0 +1,211 @@ +using System; +using System.Collections; + +using Org.BouncyCastle.Asn1; +using Org.BouncyCastle.Crypto; +using Org.BouncyCastle.Crypto.Digests; +using Org.BouncyCastle.Math; + +namespace Org.BouncyCastle.Asn1.X509 +{ + /** + * The AuthorityKeyIdentifier object. + * <pre> + * id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 35 } + * + * AuthorityKeyIdentifier ::= Sequence { + * keyIdentifier [0] IMPLICIT KeyIdentifier OPTIONAL, + * authorityCertIssuer [1] IMPLICIT GeneralNames OPTIONAL, + * authorityCertSerialNumber [2] IMPLICIT CertificateSerialNumber OPTIONAL } + * + * KeyIdentifier ::= OCTET STRING + * </pre> + * + */ + public class AuthorityKeyIdentifier + : Asn1Encodable + { + internal readonly Asn1OctetString keyidentifier; + internal readonly GeneralNames certissuer; + internal readonly DerInteger certserno; + + public static AuthorityKeyIdentifier GetInstance( + Asn1TaggedObject obj, + bool explicitly) + { + return GetInstance(Asn1Sequence.GetInstance(obj, explicitly)); + } + + public static AuthorityKeyIdentifier GetInstance( + object obj) + { + if (obj is AuthorityKeyIdentifier) + { + return (AuthorityKeyIdentifier) obj; + } + + if (obj is Asn1Sequence) + { + return new AuthorityKeyIdentifier((Asn1Sequence) obj); + } + + if (obj is X509Extension) + { + return GetInstance(X509Extension.ConvertValueToObject((X509Extension) obj)); + } + + throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj"); + } + + protected internal AuthorityKeyIdentifier( + Asn1Sequence seq) + { + foreach (Asn1TaggedObject o in seq) + { + switch (o.TagNo) + { + case 0: + this.keyidentifier = Asn1OctetString.GetInstance(o, false); + break; + case 1: + this.certissuer = GeneralNames.GetInstance(o, false); + break; + case 2: + this.certserno = DerInteger.GetInstance(o, false); + break; + default: + throw new ArgumentException("illegal tag"); + } + } + } + + /** + * + * Calulates the keyidentifier using a SHA1 hash over the BIT STRING + * from SubjectPublicKeyInfo as defined in RFC2459. + * + * Example of making a AuthorityKeyIdentifier: + * <pre> + * SubjectPublicKeyInfo apki = new SubjectPublicKeyInfo((ASN1Sequence)new ASN1InputStream( + * publicKey.getEncoded()).readObject()); + * AuthorityKeyIdentifier aki = new AuthorityKeyIdentifier(apki); + * </pre> + * + **/ + public AuthorityKeyIdentifier( + SubjectPublicKeyInfo spki) + { + IDigest digest = new Sha1Digest(); + byte[] resBuf = new byte[digest.GetDigestSize()]; + + byte[] bytes = spki.PublicKeyData.GetBytes(); + digest.BlockUpdate(bytes, 0, bytes.Length); + digest.DoFinal(resBuf, 0); + this.keyidentifier = new DerOctetString(resBuf); + } + + /** + * create an AuthorityKeyIdentifier with the GeneralNames tag and + * the serial number provided as well. + */ + public AuthorityKeyIdentifier( + SubjectPublicKeyInfo spki, + GeneralNames name, + BigInteger serialNumber) + { + IDigest digest = new Sha1Digest(); + byte[] resBuf = new byte[digest.GetDigestSize()]; + + byte[] bytes = spki.PublicKeyData.GetBytes(); + digest.BlockUpdate(bytes, 0, bytes.Length); + digest.DoFinal(resBuf, 0); + + this.keyidentifier = new DerOctetString(resBuf); + this.certissuer = name; + this.certserno = new DerInteger(serialNumber); + } + + /** + * create an AuthorityKeyIdentifier with the GeneralNames tag and + * the serial number provided. + */ + public AuthorityKeyIdentifier( + GeneralNames name, + BigInteger serialNumber) + { + this.keyidentifier = null; + this.certissuer = GeneralNames.GetInstance(name.ToAsn1Object()); + this.certserno = new DerInteger(serialNumber); + } + + /** + * create an AuthorityKeyIdentifier with a precomputed key identifier + */ + public AuthorityKeyIdentifier( + byte[] keyIdentifier) + { + this.keyidentifier = new DerOctetString(keyIdentifier); + this.certissuer = null; + this.certserno = null; + } + + /** + * create an AuthorityKeyIdentifier with a precomupted key identifier + * and the GeneralNames tag and the serial number provided as well. + */ + public AuthorityKeyIdentifier( + byte[] keyIdentifier, + GeneralNames name, + BigInteger serialNumber) + { + this.keyidentifier = new DerOctetString(keyIdentifier); + this.certissuer = GeneralNames.GetInstance(name.ToAsn1Object()); + this.certserno = new DerInteger(serialNumber); + } + + public byte[] GetKeyIdentifier() + { + return keyidentifier == null ? null : keyidentifier.GetOctets(); + } + + public GeneralNames AuthorityCertIssuer + { + get { return certissuer; } + } + + public BigInteger AuthorityCertSerialNumber + { + get { return certserno == null ? null : certserno.Value; } + } + + /** + * Produce an object suitable for an Asn1OutputStream. + */ + public override Asn1Object ToAsn1Object() + { + Asn1EncodableVector v = new Asn1EncodableVector(); + + if (keyidentifier != null) + { + v.Add(new DerTaggedObject(false, 0, keyidentifier)); + } + + if (certissuer != null) + { + v.Add(new DerTaggedObject(false, 1, certissuer)); + } + + if (certserno != null) + { + v.Add(new DerTaggedObject(false, 2, certserno)); + } + + return new DerSequence(v); + } + + public override string ToString() + { + return ("AuthorityKeyIdentifier: KeyID(" + this.keyidentifier.GetOctets() + ")"); + } + } +} |