1 files changed, 98 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/cryptopro/GOST28147Parameters.java b/core/src/main/java/org/spongycastle/asn1/cryptopro/GOST28147Parameters.java
new file mode 100644
index 00000000..7db9e235
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/cryptopro/GOST28147Parameters.java
@@ -0,0 +1,98 @@
+package org.spongycastle.asn1.cryptopro;
+
+import java.util.Enumeration;
+
+import org.spongycastle.asn1.ASN1EncodableVector;
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.ASN1OctetString;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1Sequence;
+import org.spongycastle.asn1.ASN1TaggedObject;
+import org.spongycastle.asn1.DERSequence;
+
+/**
+ * ASN.1 algorithm identifier parameters for GOST-28147
+ */
+public class GOST28147Parameters
+    extends ASN1Object
+{
+    private ASN1OctetString iv;
+    private ASN1ObjectIdentifier paramSet;
+
+    public static GOST28147Parameters getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        return getInstance(ASN1Sequence.getInstance(obj, explicit));
+    }
+
+    public static GOST28147Parameters getInstance(
+        Object obj)
+    {
+        if (obj instanceof GOST28147Parameters)
+        {
+            return (GOST28147Parameters)obj;
+        }
+
+        if (obj != null)
+        {
+            return new GOST28147Parameters(ASN1Sequence.getInstance(obj));
+        }
+
+        return null;
+    }
+
+    /**
+     * @deprecated use the getInstance() method. This constructor will vanish!
+     */
+    public GOST28147Parameters(
+        ASN1Sequence  seq)
+    {
+        Enumeration     e = seq.getObjects();
+
+        iv = (ASN1OctetString)e.nextElement();
+        paramSet = (ASN1ObjectIdentifier)e.nextElement();
+    }
+
+    /**
+     * <pre>
+     * Gost28147-89-Parameters ::=
+     *               SEQUENCE {
+     *                       iv                   Gost28147-89-IV,
+     *                       encryptionParamSet   OBJECT IDENTIFIER
+     *                }
+     *
+     *   Gost28147-89-IV ::= OCTET STRING (SIZE (8))
+     * </pre>
+     */
+    public ASN1Primitive toASN1Primitive()
+    {
+        ASN1EncodableVector  v = new ASN1EncodableVector();
+
+        v.add(iv);
+        v.add(paramSet);
+
+        return new DERSequence(v);
+    }
+
+    /**
+     * Return the OID representing the sBox to use.
+     *
+     * @return the sBox OID.
+     */
+    public ASN1ObjectIdentifier getEncryptionParamSet()
+    {
+        return paramSet;
+    }
+
+    /**
+     * Return the initialisation vector to use.
+     *
+     * @return the IV.
+     */
+    public byte[] getIV()
+    {
+        return iv.getOctets();
+    }
+}