Fixed bigIntegerToByteArray for BigInteger.ZERO input

mmaehren · mmaehren · commit 454e80d75de7 · 2020-12-16T14:29:03.000+01:00
diff --git a/src/main/java/de/rub/nds/modifiablevariable/util/ArrayConverter.java b/src/main/java/de/rub/nds/modifiablevariable/util/ArrayConverter.java
@@ -278,6 +278,8 @@ public static void makeArrayNonZero(final byte[] array) {
     public static byte[] bigIntegerToByteArray(BigInteger value, int blockSize, boolean removeSignByte) {
         if (blockSize == 0) {
             return new byte[0];
+        } else if (value.equals(BigInteger.ZERO)) {
+            return new byte[blockSize];
         }
         byte[] array = value.toByteArray();
         int remainder = array.length % blockSize;

Original file line number	Diff line number	Diff line change
`@@ -278,6 +278,8 @@ public static void makeArrayNonZero(final byte[] array) {`
`278`	`278`	`public static byte[] bigIntegerToByteArray(BigInteger value, int blockSize, boolean removeSignByte) {`
`279`	`279`	`if (blockSize == 0) {`
`280`	`280`	`return new byte[0];`
	`281`	`+ } else if (value.equals(BigInteger.ZERO)) {`
	`282`	`+ return new byte[blockSize];`
`281`	`283`	`}`
`282`	`284`	`byte[] array = value.toByteArray();`
`283`	`285`	`int remainder = array.length % blockSize;`