1 files changed, 76 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/DigestInfo.cs b/Crypto/src/asn1/x509/DigestInfo.cs
new file mode 100644
index 000000000..1dec227fa
--- /dev/null
+++ b/Crypto/src/asn1/x509/DigestInfo.cs
@@ -0,0 +1,76 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+ /**
+ * The DigestInfo object.
+ * <pre>
+ * DigestInfo::=Sequence{
+ * digestAlgorithm AlgorithmIdentifier,
+ * digest OCTET STRING }
+ * </pre>
+ */
+ public class DigestInfo
+ : Asn1Encodable
+ {
+ private readonly byte[] digest;
+ private readonly AlgorithmIdentifier algID;
+
+ public static DigestInfo GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ public static DigestInfo GetInstance(
+ object obj)
+ {
+ if (obj is DigestInfo)
+ {
+ return (DigestInfo) obj;
+ }
+
+ if (obj is Asn1Sequence)
+ {
+ return new DigestInfo((Asn1Sequence) obj);
+ }
+
+ throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+ }
+
+ public DigestInfo(
+ AlgorithmIdentifier algID,
+ byte[] digest)
+ {
+ this.digest = digest;
+ this.algID = algID;
+ }
+
+ private DigestInfo(
+ Asn1Sequence seq)
+ {
+ if (seq.Count != 2)
+ throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+ algID = AlgorithmIdentifier.GetInstance(seq[0]);
+ digest = Asn1OctetString.GetInstance(seq[1]).GetOctets();
+ }
+
+ public AlgorithmIdentifier AlgorithmID
+ {
+ get { return algID; }
+ }
+
+ public byte[] GetDigest()
+ {
+ return digest;
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerSequence(algID, new DerOctetString(digest));
+ }
+ }
+}
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