1 files changed, 140 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/asn1/ParSet.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/asn1/ParSet.java
new file mode 100644
index 000000000..d5110a2c4
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/asn1/ParSet.java
@@ -0,0 +1,140 @@
+package org.spongycastle.pqc.asn1;
+
+import java.math.BigInteger;
+
+import org.spongycastle.asn1.ASN1EncodableVector;
+import org.spongycastle.asn1.ASN1Integer;
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1Sequence;
+import org.spongycastle.asn1.DERSequence;
+import org.spongycastle.util.Arrays;
+
+/**
+ * <pre>
+ *  ParSet              ::= SEQUENCE {
+ *      T               INTEGER
+ *      h               SEQUENCE OF INTEGER
+ *      w               SEQUENCE OF INTEGER
+ *      K               SEQUENCE OF INTEGER
+ *  }
+ * </pre>
+ */
+public class ParSet
+    extends ASN1Object
+{
+    private static final BigInteger ZERO = BigInteger.valueOf(0);
+
+    private int   t;
+    private int[] h;
+    private int[] w;
+    private int[] k;
+
+    private static int checkBigIntegerInIntRangeAndPositive(BigInteger b)
+    {
+        if ((b.compareTo(BigInteger.valueOf(Integer.MAX_VALUE)) > 0) ||
+            (b.compareTo(ZERO) <= 0))
+        {
+            throw new IllegalArgumentException("BigInteger not in Range: " + b.toString());
+        }
+        return b.intValue();
+    }
+
+    private ParSet(ASN1Sequence seq)
+    {
+        if (seq.size() != 4)
+        {
+            throw new IllegalArgumentException("sie of seqOfParams = " + seq.size());
+        }
+        BigInteger asn1int = ((ASN1Integer)seq.getObjectAt(0)).getValue();
+
+        t = checkBigIntegerInIntRangeAndPositive(asn1int);
+
+        ASN1Sequence seqOfPSh = (ASN1Sequence)seq.getObjectAt(1);
+        ASN1Sequence seqOfPSw = (ASN1Sequence)seq.getObjectAt(2);
+        ASN1Sequence seqOfPSK = (ASN1Sequence)seq.getObjectAt(3);
+
+        if ((seqOfPSh.size() != t) ||
+            (seqOfPSw.size() != t) ||
+            (seqOfPSK.size() != t))
+        {
+            throw new IllegalArgumentException("invalid size of sequences");
+        }
+
+        h = new int[seqOfPSh.size()];
+        w = new int[seqOfPSw.size()];
+        k = new int[seqOfPSK.size()];
+
+        for (int i = 0; i < t; i++)
+        {
+            h[i] = checkBigIntegerInIntRangeAndPositive((((ASN1Integer)seqOfPSh.getObjectAt(i))).getValue());
+            w[i] = checkBigIntegerInIntRangeAndPositive((((ASN1Integer)seqOfPSw.getObjectAt(i))).getValue());
+            k[i] = checkBigIntegerInIntRangeAndPositive((((ASN1Integer)seqOfPSK.getObjectAt(i))).getValue());
+        }
+    }
+
+    public ParSet(int t, int[] h, int[] w, int[] k)
+    {
+        this.t = t;
+        this.h = h;
+        this.w = w;
+        this.k = k;
+    }
+
+    public static ParSet getInstance(Object o)
+    {
+        if (o instanceof ParSet)
+        {
+            return (ParSet)o;
+        }
+        else if (o != null)
+        {
+            return new ParSet(ASN1Sequence.getInstance(o));
+        }
+
+        return null;
+    }
+
+    public int getT()
+    {
+        return t;
+    }
+
+    public int[] getH()
+    {
+        return Arrays.clone(h);
+    }
+
+    public int[] getW()
+    {
+        return Arrays.clone(w);
+    }
+
+    public int[] getK()
+    {
+        return Arrays.clone(k);
+    }
+
+    public ASN1Primitive toASN1Primitive()
+    {
+        ASN1EncodableVector seqOfPSh = new ASN1EncodableVector();
+        ASN1EncodableVector seqOfPSw = new ASN1EncodableVector();
+        ASN1EncodableVector seqOfPSK = new ASN1EncodableVector();
+
+        for (int i = 0; i < h.length; i++)
+        {
+            seqOfPSh.add(new ASN1Integer(h[i]));
+            seqOfPSw.add(new ASN1Integer(w[i]));
+            seqOfPSK.add(new ASN1Integer(k[i]));
+        }
+
+        ASN1EncodableVector v = new ASN1EncodableVector();
+
+        v.add(new ASN1Integer(t));
+        v.add(new DERSequence(seqOfPSh));
+        v.add(new DERSequence(seqOfPSw));
+        v.add(new DERSequence(seqOfPSK));
+
+        return new DERSequence(v);
+    }
+}