remove unsigned support

src/commonMain/kotlin/com/infendro/hash/sha1/SHA1.kt

@@ -13,25 +13,24 @@ object SHA1 : HashFunction {
     override val block: Int
         get() = 64
 
-    private val initial = uintArrayOf(
-        0x67452301U, 0xefcdaB89U,
-        0x98badcfeU, 0x10325476U,
-        0xc3d2e1f0U,
-    ).asIntArray()
+    private val initial = intArrayOf(
+        +0x67452301, -0x10325477,
+        -0x67452302, +0x10325476,
+        -0x3c2d1e10,
+    )
 
-    private val k = uintArrayOf(
-        0x5a827999U, 0x6ed9eba1U,
-        0x8f1bbcdcU, 0xca62c1d6U,
-    ).asIntArray()
+    private val k = intArrayOf(
+        +0x5a827999, +0x6ed9eba1,
+        -0x70e44324, -0x359d3e2a,
+    )
 
     override fun hashInto(value: ByteArray, destination: ByteArray, destinationOffset: Int) {
         val input = pad(value)
         val h = initial.copyOf()
-        val w = IntArray(80)
-        val v = IntArray(5)
 
         for (i in input.indices step block) {
-            process(h, input, i, w, v)
+            val block = input.sliceArray(i..<(i + block))
+            process(h, block)
         }
         h.copyInto(destination, destinationOffset)
     }
@@ -47,12 +46,13 @@ object SHA1 : HashFunction {
         }
     }
 
-    private fun process(h: IntArray, value: ByteArray, offset: Int, w: IntArray, v: IntArray) {
-        value.copyInto(w, startIndex = offset, endIndex = offset + block)
+    private fun process(h: IntArray, block: ByteArray) {
+        val w = IntArray(80)
+        block.copyInto(w)
         for (i in 16..<80) {
             w[i] = (w[i - 3] xor w[i - 8] xor w[i - 14] xor w[i - 16]).rotateLeft(1)
         }
-        h.copyInto(v)
+        val v = h.copyOf()
 
         repeat(80) { i ->
             val f = when (i) {