1 files changed, 118 insertions, 0 deletions
diff --git a/Crypto/src/asn1/sec/ECPrivateKeyStructure.cs b/Crypto/src/asn1/sec/ECPrivateKeyStructure.cs
new file mode 100644
index 000000000..2e9c27fd2
--- /dev/null
+++ b/Crypto/src/asn1/sec/ECPrivateKeyStructure.cs
@@ -0,0 +1,118 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.Sec
+{
+ /**
+ * the elliptic curve private key object from SEC 1
+ */
+ public class ECPrivateKeyStructure
+ : Asn1Encodable
+ {
+ private readonly Asn1Sequence seq;
+
+ public ECPrivateKeyStructure(
+ Asn1Sequence seq)
+ {
+ if (seq == null)
+ throw new ArgumentNullException("seq");
+
+ this.seq = seq;
+ }
+
+ public ECPrivateKeyStructure(
+ BigInteger key)
+ {
+ if (key == null)
+ throw new ArgumentNullException("key");
+
+ this.seq = new DerSequence(
+ new DerInteger(1),
+ new DerOctetString(key.ToByteArrayUnsigned()));
+ }
+
+ public ECPrivateKeyStructure(
+ BigInteger key,
+ Asn1Encodable parameters)
+ : this(key, null, parameters)
+ {
+ }
+
+ public ECPrivateKeyStructure(
+ BigInteger key,
+ DerBitString publicKey,
+ Asn1Encodable parameters)
+ {
+ if (key == null)
+ throw new ArgumentNullException("key");
+
+ Asn1EncodableVector v = new Asn1EncodableVector(
+ new DerInteger(1),
+ new DerOctetString(key.ToByteArrayUnsigned()));
+
+ if (parameters != null)
+ {
+ v.Add(new DerTaggedObject(true, 0, parameters));
+ }
+
+ if (publicKey != null)
+ {
+ v.Add(new DerTaggedObject(true, 1, publicKey));
+ }
+
+ this.seq = new DerSequence(v);
+ }
+
+ public BigInteger GetKey()
+ {
+ Asn1OctetString octs = (Asn1OctetString) seq[1];
+
+ return new BigInteger(1, octs.GetOctets());
+ }
+
+ public DerBitString GetPublicKey()
+ {
+ return (DerBitString) GetObjectInTag(1);
+ }
+
+ public Asn1Object GetParameters()
+ {
+ return GetObjectInTag(0);
+ }
+
+ private Asn1Object GetObjectInTag(
+ int tagNo)
+ {
+ foreach (Asn1Encodable ae in seq)
+ {
+ Asn1Object obj = ae.ToAsn1Object();
+
+ if (obj is Asn1TaggedObject)
+ {
+ Asn1TaggedObject tag = (Asn1TaggedObject) obj;
+ if (tag.TagNo == tagNo)
+ {
+ return tag.GetObject();
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * ECPrivateKey ::= SEQUENCE {
+ * version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
+ * privateKey OCTET STRING,
+ * parameters [0] Parameters OPTIONAL,
+ * publicKey [1] BIT STRING OPTIONAL }
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ return seq;
+ }
+ }
+}
|
