1 files changed, 25 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/ntru/polynomial/TernaryPolynomial.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/ntru/polynomial/TernaryPolynomial.java
new file mode 100644
index 000000000..6b9530b3b
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/pqc/math/ntru/polynomial/TernaryPolynomial.java
@@ -0,0 +1,25 @@
+package org.spongycastle.pqc.math.ntru.polynomial;
+
+/**
+ * A polynomial whose coefficients are all equal to -1, 0, or 1
+ */
+public interface TernaryPolynomial
+    extends Polynomial
+{
+
+    /**
+     * Multiplies the polynomial by an <code>IntegerPolynomial</code>, taking the indices mod N
+     */
+    IntegerPolynomial mult(IntegerPolynomial poly2);
+
+    int[] getOnes();
+
+    int[] getNegOnes();
+
+    /**
+     * Returns the maximum number of coefficients the polynomial can have
+     */
+    int size();
+
+    void clear();
+}