implement tests

also fix MD5

build.gradle.kts

@@ -22,6 +22,9 @@ kotlin {
         commonMain.dependencies {
             implementation(libs.bytearray)
         }
+        commonTest.dependencies {
+            implementation(libs.test)
+        }
     }
 
     compilerOptions {

gradle/libs.versions.toml

@@ -7,3 +7,4 @@ multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotl
 
 [libraries]
 bytearray = { module = "com.infendro:bytearray", version.ref = "bytearray" }
+test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }

src/commonMain/kotlin/com/infendro/hash/HashFunction.kt

@@ -2,8 +2,6 @@ package com.infendro.hash
 
 abstract class HashFunction {
     abstract val bytes: Int
-
-    @Suppress("UNUSED")
     val bits: Int
         get() = bytes * 8
 

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

@@ -6,12 +6,13 @@ import com.infendro.bytearray.toULongArray
 import com.infendro.hash.HashFunction
 import kotlin.math.min
 
-@Suppress("UNUSED")
+abstract class Keccak internal constructor(
-open class Keccak internal constructor(
+    private val rate: Int,
-    override val bytes: Int,
-    override val block: Int,
     private val domain: UByte,
 ) : HashFunction() {
+    override val block: Int
+        get() = rate
+
     private val rc = ulongArrayOf(
         0x0000000000000001UL, 0x0000000000008082UL, 0x800000000000808aUL, 0x8000000080008000UL,
         0x000000000000808bUL, 0x0000000080000001UL, 0x8000000080008081UL, 0x8000000000008009UL,
@@ -35,7 +36,7 @@ open class Keccak internal constructor(
         val paddedValue = buildList {
             addAll(value)
             add(domain)
-            while ((size % block) != (block - 1)) {
+            while ((size % rate) != (rate - 1)) {
                 add(0x00U)
             }
             add(0x80U)
@@ -45,7 +46,7 @@ open class Keccak internal constructor(
 
         // absorb
         val chunks = paddedValue
-            .chunked(block) { it.toUByteArray() }
+            .chunked(rate) { it.toUByteArray() }
         for (chunk in chunks) {
             val numbers = chunk.toULongArray(LITTLE_ENDIAN)
             for ((i, number) in numbers.withIndex()) {
@@ -58,7 +59,7 @@ open class Keccak internal constructor(
         return buildList {
             var i = 0
             while (size < bytes) {
-                if (i == block / 8) {
+                if (i == rate / 8) {
                     permute(state)
                     i = 0
                 }

src/commonMain/kotlin/com/infendro/hash/keccak/sha3/SHA3-224.kt

@@ -2,5 +2,7 @@ package com.infendro.hash.keccak.sha3
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+object `SHA3-224` : Keccak(144, 0x06U) {
-object `SHA3-224` : Keccak(28, 144, 0x06U)
+    override val bytes: Int
+        get() = 28
+}

src/commonMain/kotlin/com/infendro/hash/keccak/sha3/SHA3-256.kt

@@ -2,5 +2,7 @@ package com.infendro.hash.keccak.sha3
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+object `SHA3-256` : Keccak(136, 0x06U) {
-object `SHA3-256` : Keccak(32, 136, 0x06U)
+    override val bytes: Int
+        get() = 32
+}

src/commonMain/kotlin/com/infendro/hash/keccak/sha3/SHA3-384.kt

@@ -2,5 +2,7 @@ package com.infendro.hash.keccak.sha3
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+object `SHA3-384` : Keccak(104, 0x06U) {
-object `SHA3-384` : Keccak(48, 104, 0x06U)
+    override val bytes: Int
+        get() = 48
+}

src/commonMain/kotlin/com/infendro/hash/keccak/sha3/SHA3-512.kt

@@ -2,5 +2,7 @@ package com.infendro.hash.keccak.sha3
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+object `SHA3-512` : Keccak(72, 0x06U) {
-object `SHA3-512` : Keccak(64, 72, 0x06U)
+    override val bytes: Int
+        get() = 64
+}

src/commonMain/kotlin/com/infendro/hash/keccak/shake/SHAKE128.kt

@@ -2,5 +2,6 @@ package com.infendro.hash.keccak.shake
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+class SHAKE128(
-class SHAKE128(bytes: Int) : Keccak(bytes, 168, 0x1FU)
+    override val bytes: Int,
+) : Keccak(168, 0x1FU)

src/commonMain/kotlin/com/infendro/hash/keccak/shake/SHAKE256.kt

@@ -2,5 +2,6 @@ package com.infendro.hash.keccak.shake
 
 import com.infendro.hash.keccak.Keccak
 
-@Suppress("UNUSED")
+class SHAKE256(
-class SHAKE256(bytes: Int) : Keccak(bytes, 136, 0x1FU)
+    override val bytes: Int,
+) : Keccak(136, 0x1FU)

src/commonMain/kotlin/com/infendro/hash/md/MD5.kt

@@ -5,7 +5,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toUIntArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object MD5 : HashFunction() {
     override val bytes: Int
         get() = 16
@@ -94,10 +93,11 @@ object MD5 : HashFunction() {
                     in 32..47 -> (3 * i + 5) % 16
                     else -> (7 * i) % 16
                 }
+                val temp = a
                 a = d
                 d = c
                 c = b
-                b += (f + a + k[i] + w[g]).rotateLeft(s[i])
+                b += (temp + f + k[i] + w[g]).rotateLeft(s[i])
             }
 
             a0 += a

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

@@ -4,7 +4,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toUIntArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object SHA1 : HashFunction() {
     override val bytes: Int
         get() = 20

src/commonMain/kotlin/com/infendro/hash/sha2/SHA-224.kt

@@ -4,7 +4,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toUIntArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object `SHA-224` : HashFunction() {
     override val bytes: Int
         get() = 28

src/commonMain/kotlin/com/infendro/hash/sha2/SHA-256.kt

@@ -4,7 +4,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toUIntArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object `SHA-256` : HashFunction() {
     override val bytes: Int
         get() = 32

src/commonMain/kotlin/com/infendro/hash/sha2/SHA-384.kt

@@ -4,7 +4,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toULongArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object `SHA-384` : HashFunction() {
     override val bytes: Int
         get() = 48

src/commonMain/kotlin/com/infendro/hash/sha2/SHA-512.kt

@@ -4,7 +4,6 @@ import com.infendro.bytearray.toUByteArray
 import com.infendro.bytearray.toULongArray
 import com.infendro.hash.HashFunction
 
-@Suppress("UNUSED")
 object `SHA-512` : HashFunction() {
     override val bytes: Int
         get() = 64

src/commonTest/kotlin/com/infendro/hash/keccak/sha3/SHA3-224.kt

@@ -0,0 +1,33 @@
+package com.infendro.hash.keccak.sha3
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA3-224 Test` {
+    val function = `SHA3-224`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(28, function.bytes)
+        assertEquals(224, function.bits)
+        assertEquals(144, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x6bU, 0x4eU, 0x03U, 0x42U,
+            0x36U, 0x67U, 0xdbU, 0xb7U,
+            0x3bU, 0x6eU, 0x15U, 0x45U,
+            0x4fU, 0x0eU, 0xb1U, 0xabU,
+            0xd4U, 0x59U, 0x7fU, 0x9aU,
+            0x1bU, 0x07U, 0x8eU, 0x3fU,
+            0x5bU, 0x5aU, 0x6bU, 0xc7U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/keccak/sha3/SHA3-256.kt

@@ -0,0 +1,34 @@
+package com.infendro.hash.keccak.sha3
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA3-256 Test` {
+    val function = `SHA3-256`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(32, function.bytes)
+        assertEquals(256, function.bits)
+        assertEquals(136, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xa7U, 0xffU, 0xc6U, 0xf8U,
+            0xbfU, 0x1eU, 0xd7U, 0x66U,
+            0x51U, 0xc1U, 0x47U, 0x56U,
+            0xa0U, 0x61U, 0xd6U, 0x62U,
+            0xf5U, 0x80U, 0xffU, 0x4dU,
+            0xe4U, 0x3bU, 0x49U, 0xfaU,
+            0x82U, 0xd8U, 0x0aU, 0x4bU,
+            0x80U, 0xf8U, 0x43U, 0x4aU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/keccak/sha3/SHA3-384.kt

@@ -0,0 +1,38 @@
+package com.infendro.hash.keccak.sha3
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA3-384 Test` {
+    val function = `SHA3-384`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(48, function.bytes)
+        assertEquals(384, function.bits)
+        assertEquals(104, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x0cU, 0x63U, 0xa7U, 0x5bU,
+            0x84U, 0x5eU, 0x4fU, 0x7dU,
+            0x01U, 0x10U, 0x7dU, 0x85U,
+            0x2eU, 0x4cU, 0x24U, 0x85U,
+            0xc5U, 0x1aU, 0x50U, 0xaaU,
+            0xaaU, 0x94U, 0xfcU, 0x61U,
+            0x99U, 0x5eU, 0x71U, 0xbbU,
+            0xeeU, 0x98U, 0x3aU, 0x2aU,
+            0xc3U, 0x71U, 0x38U, 0x31U,
+            0x26U, 0x4aU, 0xdbU, 0x47U,
+            0xfbU, 0x6bU, 0xd1U, 0xe0U,
+            0x58U, 0xd5U, 0xf0U, 0x04U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/keccak/sha3/SHA3-512.kt

@@ -0,0 +1,42 @@
+package com.infendro.hash.keccak.sha3
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA3-512 Test` {
+    val function = `SHA3-512`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(64, function.bytes)
+        assertEquals(512, function.bits)
+        assertEquals(72, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xa6U, 0x9fU, 0x73U, 0xccU,
+            0xa2U, 0x3aU, 0x9aU, 0xc5U,
+            0xc8U, 0xb5U, 0x67U, 0xdcU,
+            0x18U, 0x5aU, 0x75U, 0x6eU,
+            0x97U, 0xc9U, 0x82U, 0x16U,
+            0x4fU, 0xe2U, 0x58U, 0x59U,
+            0xe0U, 0xd1U, 0xdcU, 0xc1U,
+            0x47U, 0x5cU, 0x80U, 0xa6U,
+            0x15U, 0xb2U, 0x12U, 0x3aU,
+            0xf1U, 0xf5U, 0xf9U, 0x4cU,
+            0x11U, 0xe3U, 0xe9U, 0x40U,
+            0x2cU, 0x3aU, 0xc5U, 0x58U,
+            0xf5U, 0x00U, 0x19U, 0x9dU,
+            0x95U, 0xb6U, 0xd3U, 0xe3U,
+            0x01U, 0x75U, 0x85U, 0x86U,
+            0x28U, 0x1dU, 0xcdU, 0x26U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/keccak/shake/SHAKE128.kt

@@ -0,0 +1,34 @@
+package com.infendro.hash.keccak.shake
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHAKE128 Test` {
+    val function = SHAKE128(32)
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(32, function.bytes)
+        assertEquals(256, function.bits)
+        assertEquals(168, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x7fU, 0x9cU, 0x2bU, 0xa4U,
+            0xe8U, 0x8fU, 0x82U, 0x7dU,
+            0x61U, 0x60U, 0x45U, 0x50U,
+            0x76U, 0x05U, 0x85U, 0x3eU,
+            0xd7U, 0x3bU, 0x80U, 0x93U,
+            0xf6U, 0xefU, 0xbcU, 0x88U,
+            0xebU, 0x1aU, 0x6eU, 0xacU,
+            0xfaU, 0x66U, 0xefU, 0x26U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/keccak/shake/SHAKE256.kt

@@ -0,0 +1,42 @@
+package com.infendro.hash.keccak.shake
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHAKE256 Test` {
+    val function = SHAKE256(64)
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(64, function.bytes)
+        assertEquals(512, function.bits)
+        assertEquals(136, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x46U, 0xb9U, 0xddU, 0x2bU,
+            0x0bU, 0xa8U, 0x8dU, 0x13U,
+            0x23U, 0x3bU, 0x3fU, 0xebU,
+            0x74U, 0x3eU, 0xebU, 0x24U,
+            0x3fU, 0xcdU, 0x52U, 0xeaU,
+            0x62U, 0xb8U, 0x1bU, 0x82U,
+            0xb5U, 0x0cU, 0x27U, 0x64U,
+            0x6eU, 0xd5U, 0x76U, 0x2fU,
+            0xd7U, 0x5dU, 0xc4U, 0xddU,
+            0xd8U, 0xc0U, 0xf2U, 0x00U,
+            0xcbU, 0x05U, 0x01U, 0x9dU,
+            0x67U, 0xb5U, 0x92U, 0xf6U,
+            0xfcU, 0x82U, 0x1cU, 0x49U,
+            0x47U, 0x9aU, 0xb4U, 0x86U,
+            0x40U, 0x29U, 0x2eU, 0xacU,
+            0xb3U, 0xb7U, 0xc4U, 0xbeU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/md/MD5.kt

@@ -0,0 +1,30 @@
+package com.infendro.hash.md
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `MD5 Test` {
+    val function = MD5
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(16, function.bytes)
+        assertEquals(128, function.bits)
+        assertEquals(64, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xd4U, 0x1dU, 0x8cU, 0xd9U,
+            0x8fU, 0x00U, 0xb2U, 0x04U,
+            0xe9U, 0x80U, 0x09U, 0x98U,
+            0xecU, 0xf8U, 0x42U, 0x7eU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

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

@@ -0,0 +1,31 @@
+package com.infendro.hash.sha1
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA1 Test` {
+    val function = SHA1
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(20, function.bytes)
+        assertEquals(160, function.bits)
+        assertEquals(64, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xdaU, 0x39U, 0xa3U, 0xeeU,
+            0x5eU, 0x6bU, 0x4bU, 0x0dU,
+            0x32U, 0x55U, 0xbfU, 0xefU,
+            0x95U, 0x60U, 0x18U, 0x90U,
+            0xafU, 0xd8U, 0x07U, 0x09U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/sha2/SHA-224.kt

@@ -0,0 +1,33 @@
+package com.infendro.hash.sha2
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA-224 Test` {
+    val function = `SHA-224`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(28, function.bytes)
+        assertEquals(224, function.bits)
+        assertEquals(64, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xd1U, 0x4aU, 0x02U, 0x8cU,
+            0x2aU, 0x3aU, 0x2bU, 0xc9U,
+            0x47U, 0x61U, 0x02U, 0xbbU,
+            0x28U, 0x82U, 0x34U, 0xc4U,
+            0x15U, 0xa2U, 0xb0U, 0x1fU,
+            0x82U, 0x8eU, 0xa6U, 0x2aU,
+            0xc5U, 0xb3U, 0xe4U, 0x2fU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/sha2/SHA-256.kt

@@ -0,0 +1,34 @@
+package com.infendro.hash.sha2
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA-256 Test` {
+    val function = `SHA-256`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(32, function.bytes)
+        assertEquals(256, function.bits)
+        assertEquals(64, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xe3U, 0xb0U, 0xc4U, 0x42U,
+            0x98U, 0xfcU, 0x1cU, 0x14U,
+            0x9aU, 0xfbU, 0xf4U, 0xc8U,
+            0x99U, 0x6fU, 0xb9U, 0x24U,
+            0x27U, 0xaeU, 0x41U, 0xe4U,
+            0x64U, 0x9bU, 0x93U, 0x4cU,
+            0xa4U, 0x95U, 0x99U, 0x1bU,
+            0x78U, 0x52U, 0xb8U, 0x55U,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/sha2/SHA-384.kt

@@ -0,0 +1,38 @@
+package com.infendro.hash.sha2
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA-384 Test` {
+    val function = `SHA-384`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(48, function.bytes)
+        assertEquals(384, function.bits)
+        assertEquals(128, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0x38U, 0xb0U, 0x60U, 0xa7U,
+            0x51U, 0xacU, 0x96U, 0x38U,
+            0x4cU, 0xd9U, 0x32U, 0x7eU,
+            0xb1U, 0xb1U, 0xe3U, 0x6aU,
+            0x21U, 0xfdU, 0xb7U, 0x11U,
+            0x14U, 0xbeU, 0x07U, 0x43U,
+            0x4cU, 0x0cU, 0xc7U, 0xbfU,
+            0x63U, 0xf6U, 0xe1U, 0xdaU,
+            0x27U, 0x4eU, 0xdeU, 0xbfU,
+            0xe7U, 0x6fU, 0x65U, 0xfbU,
+            0xd5U, 0x1aU, 0xd2U, 0xf1U,
+            0x48U, 0x98U, 0xb9U, 0x5bU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/hash/sha2/SHA-512.kt

@@ -0,0 +1,42 @@
+package com.infendro.hash.sha2
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class `SHA-512 Test` {
+    val function = `SHA-512`
+
+    @Test
+    fun `bytes and block`() {
+        assertEquals(64, function.bytes)
+        assertEquals(512, function.bits)
+        assertEquals(128, function.block)
+    }
+
+    @Test
+    fun `empty bytearray`() {
+        val expected = ubyteArrayOf(
+            0xcfU, 0x83U, 0xe1U, 0x35U,
+            0x7eU, 0xefU, 0xb8U, 0xbdU,
+            0xf1U, 0x54U, 0x28U, 0x50U,
+            0xd6U, 0x6dU, 0x80U, 0x07U,
+            0xd6U, 0x20U, 0xe4U, 0x05U,
+            0x0bU, 0x57U, 0x15U, 0xdcU,
+            0x83U, 0xf4U, 0xa9U, 0x21U,
+            0xd3U, 0x6cU, 0xe9U, 0xceU,
+            0x47U, 0xd0U, 0xd1U, 0x3cU,
+            0x5dU, 0x85U, 0xf2U, 0xb0U,
+            0xffU, 0x83U, 0x18U, 0xd2U,
+            0x87U, 0x7eU, 0xecU, 0x2fU,
+            0x63U, 0xb9U, 0x31U, 0xbdU,
+            0x47U, 0x41U, 0x7aU, 0x81U,
+            0xa5U, 0x38U, 0x32U, 0x7aU,
+            0xf9U, 0x27U, 0xdaU, 0x3eU,
+        )
+        val actual = function.hash(
+            ubyteArrayOf()
+        )
+        assertContentEquals(expected, actual)
+    }
+}