implement destination offset

src/commonMain/kotlin/com/infendro/hash/keccak/Keccak.kt

@@ -36,7 +36,7 @@ open class Keccak(
         intArrayOf(27, 20, 39, 8, 14),
     )
 
-    override fun hashInto(value: ByteArray, destination: ByteArray) {
+    override fun hashInto(value: ByteArray, destination: ByteArray, destinationOffset: Int) {
         val input = pad(value)
         val state = LongArray(25)
         val w = LongArray(block / 8)
@@ -48,7 +48,7 @@ open class Keccak(
             absorb(state, input, i, w)
             permute(state, b, c, d)
         }
-        squeeze(state, b, c, d, destination)
+        squeeze(state, b, c, d, destination, destinationOffset)
     }
 
     private fun pad(value: ByteArray): ByteArray {
@@ -67,7 +67,14 @@ open class Keccak(
         }
     }
 
-    private fun squeeze(state: LongArray, b: LongArray, c: LongArray, d: LongArray, destination: ByteArray) {
+    private fun squeeze(
+        state: LongArray,
+        b: LongArray,
+        c: LongArray,
+        d: LongArray,
+        destination: ByteArray,
+        destinationOffset: Int,
+    ) {
         val buffer = ByteArray(8)
         val threshold = rate / 8
 
@@ -81,7 +88,7 @@ open class Keccak(
 
             val length = minOf(bytes - consumed, 8)
             state[i].copyInto(buffer, order = LITTLE_ENDIAN)
-            buffer.copyInto(destination, consumed, endIndex = length)
+            buffer.copyInto(destination, destinationOffset + consumed, endIndex = length)
 
             consumed += length
             i++