refactor package structure

2025-11-09 20:03:49 +01:00
parent c14269e0c6
commit 88d673922a
8 changed files with 38 additions and 21 deletions
--- a/src/commonMain/kotlin/com/infendro/hash/sha2/SHA-224.kt
+++ b/src/commonMain/kotlin/com/infendro/hash/sha2/SHA-224.kt
@@ -0,0 +1,105 @@
+package com.infendro.hash.sha2
+
+import com.infendro.bytearray.addAll
+import com.infendro.bytearray.toByteArray
+import com.infendro.bytearray.toUIntArray
+import com.infendro.hash.HashFunction
+
+@Suppress("UNUSED")
+object `SHA-224` : HashFunction() {
+    override val bytes: Int
+        get() = 28
+
+    private val k = arrayOf(
+        0x428a2f98U, 0x71374491U, 0xb5c0fbcfU, 0xe9b5dba5U, 0x3956c25bU, 0x59f111f1U, 0x923f82a4U, 0xab1c5ed5U,
+        0xd807aa98U, 0x12835b01U, 0x243185beU, 0x550c7dc3U, 0x72be5d74U, 0x80deb1feU, 0x9bdc06a7U, 0xc19bf174U,
+        0xe49b69c1U, 0xefbe4786U, 0x0fc19dc6U, 0x240ca1ccU, 0x2de92c6fU, 0x4a7484aaU, 0x5cb0a9dcU, 0x76f988daU,
+        0x983e5152U, 0xa831c66dU, 0xb00327c8U, 0xbf597fc7U, 0xc6e00bf3U, 0xd5a79147U, 0x06ca6351U, 0x14292967U,
+        0x27b70a85U, 0x2e1b2138U, 0x4d2c6dfcU, 0x53380d13U, 0x650a7354U, 0x766a0abbU, 0x81c2c92eU, 0x92722c85U,
+        0xa2bfe8a1U, 0xa81a664bU, 0xc24b8b70U, 0xc76c51a3U, 0xd192e819U, 0xd6990624U, 0xf40e3585U, 0x106aa070U,
+        0x19a4c116U, 0x1e376c08U, 0x2748774cU, 0x34b0bcb5U, 0x391c0cb3U, 0x4ed8aa4aU, 0x5b9cca4fU, 0x682e6ff3U,
+        0x748f82eeU, 0x78a5636fU, 0x84c87814U, 0x8cc70208U, 0x90befffaU, 0xa4506cebU, 0xbef9a3f7U, 0xc67178f2U,
+    )
+
+    override fun hash(
+        value: ByteArray,
+    ): ByteArray {
+        var h0 = 0xc1059ed8U
+        var h1 = 0x367cd507U
+        var h2 = 0x3070dd17U
+        var h3 = 0xf70e5939U
+        var h4 = 0xffc00b31U
+        var h5 = 0x68581511U
+        var h6 = 0x64f98fa7U
+        var h7 = 0xbefa4fa4U
+        val ml = value.size.toULong() * 8UL
+
+        val paddedValue = buildList {
+            addAll(value)
+            add(0x80.toByte())
+            while (size % 64 != 56) {
+                add(0x00.toByte())
+            }
+            addAll(ml.toByteArray())
+        }
+
+        val chunks = paddedValue
+            .chunked(64)
+        for (chunk in chunks) {
+            val w = buildList {
+                addAll(chunk.toUIntArray())
+                for (i in 16..<64) {
+                    val s0 = get(i - 15).rotateRight(7) xor get(i - 15).rotateRight(18) xor (get(i - 15) shr 3)
+                    val s1 = get(i - 2).rotateRight(17) xor get(i - 2).rotateRight(19) xor (get(i - 2) shr 10)
+                    add(get(i - 16) + s0 + get(i - 7) + s1)
+                }
+            }
+
+            var a = h0
+            var b = h1
+            var c = h2
+            var d = h3
+            var e = h4
+            var f = h5
+            var g = h6
+            var h = h7
+
+            for (i in 0..<64) {
+                val s0 = a.rotateRight(2) xor a.rotateRight(13) xor a.rotateRight(22)
+                val s1 = e.rotateRight(6) xor e.rotateRight(11) xor e.rotateRight(25)
+                val ch = (e and f) xor (e.inv() and g)
+                val temp1 = h + s1 + ch + k[i] + w[i]
+                val maj = (a and b) xor (a and c) xor (b and c)
+                val temp2 = s0 + maj
+
+                h = g
+                g = f
+                f = e
+                e = d + temp1
+                d = c
+                c = b
+                b = a
+                a = temp1 + temp2
+            }
+
+            h0 += a
+            h1 += b
+            h2 += c
+            h3 += d
+            h4 += e
+            h5 += f
+            h6 += g
+            h7 += h
+        }
+
+        return byteArrayOf(
+            *h0.toByteArray(),
+            *h1.toByteArray(),
+            *h2.toByteArray(),
+            *h3.toByteArray(),
+            *h4.toByteArray(),
+            *h5.toByteArray(),
+            *h6.toByteArray(),
+        )
+    }
+}