Update README.md

small rewording, link wikipedia article

.gitea/workflows/main.yaml

@@ -1,36 +0,0 @@
-on:
-  push:
-    branches:
-      - main
-
-env:
-  GIT__TOKEN: ${{ secrets.TOKEN }}
-
-jobs:
-  publish:
-    runs-on: linux
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/cache/restore@v4
-        with:
-          key: gradle
-          path: |
-            ~/.gradle/caches/
-            ~/.gradle/wrapper/
-            ~/.konan/
-
-      - uses: actions/setup-java@v4
-        with:
-          java-version: '24'
-          distribution: 'temurin'
-
-      - run: ./gradlew publish
-
-      - uses: actions/cache/save@v4
-        with:
-          key: gradle
-          path: |
-            ~/.gradle/caches/
-            ~/.gradle/wrapper/
-            ~/.konan/

.gitea/workflows/publish.yaml

@@ -0,0 +1,47 @@
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  publish:
+    runs-on: linux
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          key: gradle-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+
+      - name: Cache Konan
+        uses: actions/cache@v4
+        with:
+          key: konan-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: konan
+          path: |
+            ~/.konan/
+
+      - name: Cache Node
+        uses: actions/cache@v4
+        with:
+          key: node-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: node
+          path: |
+            ~/.gradle/nodejs
+            ~/.gradle/yarn
+
+      - name: Publish
+        run: ./gradlew publish
+        env:
+          INFENDRO__TOKEN: ${{ secrets.TOKEN }}

.gitea/workflows/test.yaml

@@ -0,0 +1,28 @@
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: linux
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          key: gradle-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+
+      - name: Test
+        run: ./gradlew jvmTest

README.md

@@ -0,0 +1,35 @@
+# kdf.kt
+
+`kdf.kt` is a Kotlin Multiplatform library that provides common [Key Derivation Functions](https://en.wikipedia.org/wiki/Key_derivation_function).
+
+Supported algorithms:
+- PBKDF2
+
+## Installation
+
+Add the following to your `build.gradle.kts`.
+
+```kotlin
+repositories {
+    maven("https://git.infendro.com/api/packages/Infendro/maven")
+}
+
+dependencies {
+    implementation("com.infendro:kdf:1.2.1")
+}
+```
+
+## Usage
+
+```kotlin
+fun main() {
+    // create a PBKDF2 instance using HMAC SHA-256
+    //   this example uses 32 bytes of length and 100_000 iterations
+    val kdf = PBKDF2(32, 100_000, `SHA-256`())
+
+    // securely hash value with some salt
+    val value = "password".encodeToByteArray()
+    val salt = "salt".encodeToByteArray()
+    val hash = kdf.hash(value, salt)
+}
+```

build.gradle.kts

@@ -1,57 +1,46 @@
-group = "com.infendro"
-version = "1.0.2"
+@file:OptIn(ExperimentalWasmDsl::class)
 
-repositories {
-    maven("https://git.infendro.com/api/packages/Infendro/maven")
-    mavenCentral()
-}
+import com.infendro.plugin.infendro
+import com.infendro.plugin.token
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+
+group = "com.infendro"
+version = "1.2.1"
 
 plugins {
+    alias(libs.plugins.infendro)
     alias(libs.plugins.multiplatform)
     id("maven-publish")
 }
 
 kotlin {
     jvm()
-    js {
-        nodejs()
-    }
     linuxX64()
+    linuxArm64()
+    mingwX64()
+    macosX64()
+    macosArm64()
+    js { nodejs() }
+    wasmJs { nodejs() }
+    wasmWasi { nodejs() }
+
+    repositories {
+        infendro()
+        mavenCentral()
+    }
 
     sourceSets {
         commonMain.dependencies {
-            implementation(libs.mac)
+            implementation(libs.bytes)
             implementation(libs.hash)
-            implementation(libs.bytearray)
+            implementation(libs.mac)
+        }
+        commonTest.dependencies {
+            implementation(libs.test)
         }
     }
 }
 
-publishing {
-    repositories {
-        maven {
-            url = uri("https://git.infendro.com/api/packages/Infendro/maven")
-            authentication.create("header", HttpHeaderAuthentication::class)
-            credentials(HttpHeaderCredentials::class) {
-                val token = secret("git.token") ?: throw GradleException()
-
-                name = "Authorization"
-                value = "token $token"
-            }
-        }
-    }
-}
-
-fun secret(
-    key: String,
-): String? {
-    val property = key
-    val environment = key
-        .uppercase()
-        .replace(".", "__")
-
-    val prop = properties[property] as String?
-    val env = System.getenv(environment)
-
-    return prop ?: env
+publishing.repositories {
+    infendro(token)
 }

gradle/libs.versions.toml

@@ -1,13 +1,16 @@
 [versions]
-kotlin = "2.2.10"
-mac = "1.1.2"
-hash = "1.2.2"
-bytearray = "1.1.1"
+infendro = "1.1.0"
+kotlin = "2.3.0"
+bytes = "1.4.2"
+hash = "1.7.0"
+mac = "1.5.0"
 
 [plugins]
+infendro = { id = "com.infendro.plugin", version.ref = "infendro" }
 multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
 
 [libraries]
-mac = { module = "com.infendro:mac", version.ref = "mac" }
+bytes = { module = "com.infendro:bytes", version.ref = "bytes" }
 hash = { module = "com.infendro:hash", version.ref = "hash" }
-bytearray = { module = "com.infendro:bytearray", version.ref = "bytearray" }
+mac = { module = "com.infendro:mac", version.ref = "mac" }
+test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }

settings.gradle.kts

@@ -1 +1,6 @@
 rootProject.name = "kdf"
+
+pluginManagement.repositories {
+    maven("https://git.infendro.com/api/packages/Infendro/maven")
+    mavenCentral()
+}

src/commonMain/kotlin/com/infendro/kdf/KDF.kt

@@ -0,0 +1,15 @@
+package com.infendro.kdf
+
+interface KDF {
+    val bytes: Int
+    val bits: Int
+        get() = bytes * 8
+
+    fun hashInto(value: ByteArray, salt: ByteArray, destination: ByteArray, destinationOffset: Int = 0)
+
+    fun hash(value: ByteArray, salt: ByteArray): ByteArray {
+        val result = ByteArray(bytes)
+        hashInto(value, salt, result)
+        return result
+    }
+}

src/commonMain/kotlin/com/infendro/kdf/PBKDF2.kt

@@ -1,39 +1,41 @@
 package com.infendro.kdf
 
-import com.infendro.bytearray.addAll
-import com.infendro.bytearray.toByteArray
-import com.infendro.bytearray.xor
+import com.infendro.bytes.bytearray.xorWith
+import com.infendro.bytes.int.toByteArray
 import com.infendro.hash.HashFunction
+import com.infendro.kdf.util.ceilDiv
 import com.infendro.mac.HMAC
 
 class PBKDF2(
+    override val bytes: Int,
+    private val iterations: Int,
     function: HashFunction,
-) {
+) : KDF {
+    init {
+        require(bytes > 0)
+        require(iterations > 0)
+    }
+
     private val hmac = HMAC(function)
+    private val buffer = ByteArray(hmac.bytes)
 
-    fun hash(
-        value: ByteArray,
-        salt: ByteArray,
-        iterations: Int,
-        length: Int,
-    ): ByteArray {
-        val key = buildList {
-            for (i in 1..(length + size - 1) / size) {
-                val input = salt + i.toUInt().toByteArray()
+    override fun hashInto(value: ByteArray, salt: ByteArray, destination: ByteArray, destinationOffset: Int) {
+        hmac.init(value)
 
-                var u = hmac.hash(value, input)
-                var result = u
-                repeat(iterations - 1) {
-                    u = hmac.hash(value, u)
-                    result = result xor u
-                }
+        for (block in 1..bytes.ceilDiv(hmac.bytes)) {
+            val offset = (block - 1) * hmac.bytes
+            val bytes = minOf(bytes - offset, hmac.bytes)
 
-                addAll(result)
+            hmac.update(salt)
+            hmac.update(block.toByteArray())
+            hmac.digestInto(buffer)
+            buffer.copyInto(destination, destinationOffset + offset, endIndex = bytes)
+            repeat(iterations - 1) {
+                hmac.update(buffer)
+                hmac.digestInto(buffer)
+                val offset = destinationOffset + offset
+                destination.xorWith(buffer, offset, offset + bytes)
             }
         }
-
-        return key
-            .take(length)
-            .toByteArray()
     }
 }

src/commonMain/kotlin/com/infendro/kdf/util/Math.kt

@@ -0,0 +1,4 @@
+package com.infendro.kdf.util
+
+internal fun Int.ceilDiv(n: Int): Int =
+    (this + n - 1) / n

src/commonTest/kotlin/com/infendro/kdf/PBKDF2.kt

@@ -0,0 +1,118 @@
+package com.infendro.kdf
+
+import com.infendro.hash.sha2.`SHA-256`
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class `PBKDF2 Test` {
+    @Test
+    fun `32 bytes 1 iteration`() {
+        val function = PBKDF2(32, 1, `SHA-256`())
+
+        val expected = byteArrayOf(
+            +0x12, +0x0f, -0x4a, -0x31, -0x04, -0x08, -0x4d, +0x2c,
+            +0x43, -0x19, +0x22, +0x52, +0x56, -0x3c, -0x08, +0x37,
+            -0x58, +0x65, +0x48, -0x37, +0x2c, -0x34, +0x35, +0x48,
+            +0x08, +0x05, -0x68, +0x7c, -0x49, +0x0b, -0x1f, +0x7b,
+        )
+        val actual = function.hash(
+            "password".encodeToByteArray(),
+            "salt".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `32 bytes 2 iterations`() {
+        val function = PBKDF2(32, 2, `SHA-256`())
+
+        val expected = byteArrayOf(
+            -0x52, +0x4d, +0x0c, -0x6b, -0x51, +0x6b, +0x46, -0x2d,
+            +0x2d, +0x0a, -0x21, -0x07, +0x28, -0x10, +0x6d, -0x30,
+            +0x2a, +0x30, +0x3f, -0x72, -0x0d, -0x3e, +0x51, -0x21,
+            -0x2a, -0x1e, -0x28, +0x5a, -0x6b, +0x47, +0x4c, +0x43,
+        )
+        val actual = function.hash(
+            "password".encodeToByteArray(),
+            "salt".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `32 bytes 4096 iterations`() {
+        val function = PBKDF2(32, 4096, `SHA-256`())
+
+        val expected = byteArrayOf(
+            -0x3b, -0x1c, +0x78, -0x2b, -0x6e, -0x78, -0x38, +0x41,
+            -0x56, +0x53, +0x0d, -0x4a, -0x7c, +0x5c, +0x4c, -0x73,
+            -0x6a, +0x28, -0x6d, -0x60, +0x01, -0x32, +0x4e, +0x11,
+            -0x5c, -0x6a, +0x38, +0x73, -0x56, -0x68, +0x13, +0x4a,
+        )
+        val actual = function.hash(
+            "password".encodeToByteArray(),
+            "salt".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `40 bytes 4096 iterations`() {
+        val function = PBKDF2(40, 4096, `SHA-256`())
+
+        val expected = byteArrayOf(
+            -0x3b, -0x1c, +0x78, -0x2b, -0x6e, -0x78, -0x38, +0x41,
+            -0x56, +0x53, +0x0d, -0x4a, -0x7c, +0x5c, +0x4c, -0x73,
+            -0x6a, +0x28, -0x6d, -0x60, +0x01, -0x32, +0x4e, +0x11,
+            -0x5c, -0x6a, +0x38, +0x73, -0x56, -0x68, +0x13, +0x4a,
+            -0x09, -0x53, -0x68, -0x3f, -0x4c, +0x58, -0x32, +0x3f,
+        )
+        val actual = function.hash(
+            "password".encodeToByteArray(),
+            "salt".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `64 bytes 1 iteration`() {
+        val function = PBKDF2(64, 1, `SHA-256`())
+
+        val expected = byteArrayOf(
+            +0x55, -0x54, +0x04, +0x6e, +0x56, -0x1d, +0x08, -0x61,
+            -0x14, +0x16, -0x6f, -0x3e, +0x25, +0x44, -0x4a, +0x05,
+            -0x07, +0x41, -0x7b, +0x21, +0x6d, -0x22, +0x04, +0x65,
+            -0x1a, -0x75, -0x63, +0x57, -0x3e, +0x0d, -0x54, -0x44,
+            +0x49, -0x36, -0x64, -0x34, -0x0f, +0x79, -0x4a, +0x45,
+            -0x67, +0x16, +0x64, -0x4d, -0x63, +0x77, -0x11, +0x31,
+            +0x7c, +0x71, -0x48, +0x45, -0x4f, -0x1d, +0x0b, -0x2b,
+            +0x09, +0x11, +0x20, +0x41, -0x2d, -0x5f, -0x69, -0x7d,
+        )
+        val actual = function.hash(
+            "passwd".encodeToByteArray(),
+            "salt".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun `64 bytes 80000 iterations`() {
+        val function = PBKDF2(64, 80_000, `SHA-256`())
+
+        val expected = byteArrayOf(
+            +0x4d, -0x24, -0x28, -0x0a, +0x0b, -0x68, -0x42, +0x21,
+            -0x7d, +0x0c, -0x12, +0x5e, -0x0e, +0x27, +0x01, -0x07,
+            +0x64, +0x1a, +0x44, +0x18, -0x30, +0x4c, +0x04, +0x14,
+            -0x52, -0x01, +0x08, -0x79, +0x6b, +0x34, -0x55, +0x56,
+            -0x5f, -0x2c, +0x25, -0x5f, +0x22, +0x58, +0x33, +0x54,
+            -0x66, -0x25, -0x7c, +0x1b, +0x51, -0x37, -0x4d, +0x17,
+            +0x6a, +0x27, +0x2b, -0x22, -0x45, -0x5f, -0x30, +0x78,
+            +0x47, -0x71, +0x62, -0x4d, -0x69, -0x0d, +0x3c, -0x73,
+        )
+        val actual = function.hash(
+            "Password".encodeToByteArray(),
+            "NaCl".encodeToByteArray(),
+        )
+        assertContentEquals(expected, actual)
+    }
+}