1 files changed, 121 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ua/DSTU4145Params.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ua/DSTU4145Params.java
new file mode 100644
index 000000000..d6c60f8be
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ua/DSTU4145Params.java
@@ -0,0 +1,121 @@
+package org.spongycastle.asn1.ua;
+
+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.DEROctetString;
+import org.spongycastle.asn1.DERSequence;
+
+public class DSTU4145Params
+    extends ASN1Object
+{
+    private static final byte DEFAULT_DKE[] = {
+        (byte)0xa9, (byte)0xd6, (byte)0xeb, 0x45, (byte)0xf1, 0x3c, 0x70, (byte)0x82,
+        (byte)0x80, (byte)0xc4, (byte)0x96, 0x7b, 0x23, 0x1f, 0x5e, (byte)0xad,
+        (byte)0xf6, 0x58, (byte)0xeb, (byte)0xa4, (byte)0xc0, 0x37, 0x29, 0x1d,
+        0x38, (byte)0xd9, 0x6b, (byte)0xf0, 0x25, (byte)0xca, 0x4e, 0x17,
+        (byte)0xf8, (byte)0xe9, 0x72, 0x0d, (byte)0xc6, 0x15, (byte)0xb4, 0x3a,
+        0x28, (byte)0x97, 0x5f, 0x0b, (byte)0xc1, (byte)0xde, (byte)0xa3, 0x64,
+        0x38, (byte)0xb5, 0x64, (byte)0xea, 0x2c, 0x17, (byte)0x9f, (byte)0xd0,
+        0x12, 0x3e, 0x6d, (byte)0xb8, (byte)0xfa, (byte)0xc5, 0x79, 0x04};
+
+
+    private ASN1ObjectIdentifier namedCurve;
+    private DSTU4145ECBinary ecbinary;
+    private byte[] dke = DEFAULT_DKE;
+
+    public DSTU4145Params(ASN1ObjectIdentifier namedCurve)
+    {
+        this.namedCurve = namedCurve;
+    }
+
+    public DSTU4145Params(DSTU4145ECBinary ecbinary)
+    {
+        this.ecbinary = ecbinary;
+    }
+
+    public boolean isNamedCurve()
+    {
+        return namedCurve != null;
+    }
+
+    public DSTU4145ECBinary getECBinary()
+    {
+        return ecbinary;
+    }
+
+    public byte[] getDKE()
+    {
+        return dke;
+    }
+
+    public static byte[] getDefaultDKE()
+    {
+        return DEFAULT_DKE;
+    }
+
+    public ASN1ObjectIdentifier getNamedCurve()
+    {
+        return namedCurve;
+    }
+
+    public static DSTU4145Params getInstance(Object obj)
+    {
+        if (obj instanceof DSTU4145Params)
+        {
+            return (DSTU4145Params)obj;
+        }
+
+        if (obj != null)
+        {
+            ASN1Sequence seq = ASN1Sequence.getInstance(obj);
+            DSTU4145Params params;
+
+            if (seq.getObjectAt(0) instanceof ASN1ObjectIdentifier)
+            {
+                params = new DSTU4145Params(ASN1ObjectIdentifier.getInstance(seq.getObjectAt(0)));
+            }
+            else
+            {
+                params = new DSTU4145Params(DSTU4145ECBinary.getInstance(seq.getObjectAt(0)));
+            }
+
+            if (seq.size() == 2)
+            {
+                params.dke = ASN1OctetString.getInstance(seq.getObjectAt(1)).getOctets();
+                if (params.dke.length != DSTU4145Params.DEFAULT_DKE.length)
+                {
+                    throw new IllegalArgumentException("object parse error");
+                }
+            }
+
+            return params;
+        }
+
+        throw new IllegalArgumentException("object parse error");
+    }
+
+    public ASN1Primitive toASN1Primitive()
+    {
+        ASN1EncodableVector v = new ASN1EncodableVector();
+
+        if (namedCurve != null)
+        {
+            v.add(namedCurve);
+        }
+        else
+        {
+            v.add(ecbinary);
+        }
+
+        if (!org.spongycastle.util.Arrays.areEqual(dke, DEFAULT_DKE))
+        {
+            v.add(new DEROctetString(dke));
+        }
+
+        return new DERSequence(v);
+    }
+}