First public version

.github/workflows/scala.yml

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+name: Scala CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    env:
+      JAVA_OPTS: "-XX:+UseG1GC -Xmx6g"
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v2
+      with:
+        java-version: '11'
+        distribution: 'adopt'
+    - name: Check headers
+      run: sbt +headerCheck
+    - name: Check scalafmt
+      run: sbt +scalafmtCheckAll
+    - name: Run tests
+      run: sbt +test

.gitignore

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+# scala
+*.class
+*.log
+
+# sbt specific
+.cache
+.history
+.lib/
+dist/*
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+.bsp/
+
+# IDEA stuff
+.idea/
+
+# scala-native
+lowered.hnir
+
+# dotty site
+_site

.scalafmt.conf

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+version = 2.7.5
+
+continuationIndent.callSite = 2
+continuationIndent.defnSite = 2
+
+docstrings.style = Asterisk

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [unreleased]
+
+## [1.0.0] - 2021-07-11
+- The first public release as dedicated project.
+
+[unreleased]: https://github.com/catap/scala-blake3/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/catap/scala-blake3/releases/tag/v1.0.0
+

LICENSE.txt

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+This work is released into the public domain with CC0 1.0.
+
+-------------------------------------------------------------------------------
+
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+
+CC0 1.0 Universal
+
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+    this CC0 or use of the Work.

README.md

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+# SHA and Shake for scala
+
+This is Secure Hash Algorithms family which is implemented for scala, scala-js and scala-native,
+without any dependencies.
+
+This code base implements SHA-0, SHA-1, SHA-2 and SHA-3. Keep in mind that SHA-0 is broken
+and I've implemented it just for fun :)
+
+This code wasn't designed to be as fast as possible. I tried my best to make implementation fast when I did it,
+but I haven't done any benchmarks yet. Will I make it one day faster or oriented to huge chunks? Probably.
+
+The propose of this code to be fast enough to hash something up to a few megabytes at the worst case
+and at few kilobytes as usual case. Where? At any scala-based application where hashing isn't the bottleneck.
+
+This assumption also included inside API: it consumes whole provided array, it allocates and copies a lot.
+
+If you need fast and secure hash function for scala I suggest to use [blak3](https://github.com/catap/scala-blake3).
+
+The latest version is ![maven-central]
+
+API is pretty simple and quite limited :)
+```
+scala> import ky.korins.sha._
+
+scala> Sha2_256.hash("abc".getBytes())
+val res1: Array[Byte] = Array(-70, 120, 22, -65, -113, 1, -49, -22, 65, 65, 64, -34, 93, -82, 34, 35, -80, 3, 97, -93, -106, 23, 122, -100, -76, 16, -1, 97, -14, 0, 21, -83)
+
+scala> 
+```
+
+[maven-central]: https://img.shields.io/maven-central/v/ky.korins/sha_2.13?style=flat-square

build.sbt

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+import sbt.Keys.crossScalaVersions
+import sbtcrossproject.CrossPlugin.autoImport.crossProject
+
+lazy val scala210 = "2.10.7"
+lazy val scala211 = "2.11.12"
+lazy val scala212 = "2.12.14"
+lazy val scala213 = "2.13.6"
+lazy val scala3 = "3.0.1"
+
+lazy val scalatestVersion = "3.2.9"
+
+name := "sha"
+ThisBuild / organization := "ky.korins"
+
+ThisBuild / dynverSeparator := "-"
+
+ThisBuild / scalaVersion := scala213
+ThisBuild / crossScalaVersions := Seq()
+
+ThisBuild / scalacOptions ++= Seq(
+  "-target:jvm-1.8",
+  "-unchecked",
+  "-deprecation"
+)
+
+ThisBuild / publishTo := sonatypePublishToBundle.value
+
+headerLicense := LicenseDefinition.template
+
+lazy val sha = crossProject(JSPlatform, JVMPlatform, NativePlatform)
+  .crossType(CrossType.Full)
+  .enablePlugins(BuildInfoPlugin)
+  .enablePlugins(AutomateHeaderPlugin)
+  .in(file("."))
+  .settings(
+    publish / skip := false,
+    Test / publishArtifact := false,
+    buildInfoKeys := Seq(
+      BuildInfoKey.action("commit") {
+        scala.sys.process.Process("git rev-parse HEAD").!!.trim
+      }
+    ),
+    headerLicense := LicenseDefinition.template,
+    buildInfoPackage := "ky.korins.sha",
+    libraryDependencies ++= Seq(
+      "org.scalatest" %%% "scalatest" % scalatestVersion % Test,
+    )
+  )
+  .jvmSettings(
+    scalaVersion := scala213,
+    crossScalaVersions := Seq(scala210, scala211, scala212, scala213, scala3)
+  )
+  .jsSettings(
+    scalaVersion := scala213,
+    crossScalaVersions := Seq(scala211, scala212, scala213, scala3),
+  )
+  .nativeSettings(
+    scalaVersion := scala213,
+    crossScalaVersions := Seq(scala211, scala212, scala213),
+    nativeLinkStubs := true,
+  )

project/LicenseDefinition.scala

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+import de.heikoseeberger.sbtheader.HeaderPlugin.autoImport.HeaderLicense
+import de.heikoseeberger.sbtheader.License
+import sbt.url
+
+object LicenseDefinition {
+  val template: Option[License.Custom] = Some(
+    HeaderLicense.Custom(
+      """scala-sha - Secure Hash Algorithms family for scala, scala-js and scala-native.
+      |
+      |Written in 2020, 2021 by Kirill A. Korinsky <[email protected]>
+      |
+      |This work is released into the public domain with CC0 1.0.
+      |""".stripMargin
+    )
+  )
+
+  val licenses = Seq(
+    "CC0 1.0 Universal" -> url(
+      "https://github.com/catap/scala-sha/blob/master/LICENSE.txt"
+    ),
+    "Apache License 2.0" -> url(
+      "https://github.com/catap/scala-sha/blob/master/LICENSE.txt"
+    )
+  )
+}

project/build.properties

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+sbt.version=1.5.4

project/plugins.sbt

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+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "1.1.0")
+addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.1.0")
+
+val scalaJSVersion =
+  Option(System.getenv("SCALAJS_VERSION")).getOrElse("1.6.0")
+val scalaNativeJSVersion =
+  Option(System.getenv("SCALANATIVE_VERSION")).getOrElse("0.4.0")
+
+addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % scalaJSVersion)
+addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % scalaNativeJSVersion)
+
+addSbtPlugin("com.github.sbt"     % "sbt-pgp"                       % "2.1.2")
+addSbtPlugin("org.xerial.sbt"     % "sbt-sonatype"                  % "3.9.7")
+addSbtPlugin("com.eed3si9n"       % "sbt-buildinfo"                 % "0.10.0")
+addSbtPlugin("com.eed3si9n"       % "sbt-assembly"                  % "1.0.0")
+addSbtPlugin("com.dwijnand"       % "sbt-dynver"                    % "4.1.1")
+addSbtPlugin("org.scalameta"      % "sbt-scalafmt"                  % "2.4.3")
+addSbtPlugin("de.heikoseeberger"  % "sbt-header"                    % "5.6.0")

shared/src/main/scala/ky/korins/sha/Paddings.scala

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+/*
+ * scala-sha - Secure Hash Algorithms family for scala, scala-js and scala-native.
+ *
+ * Written in 2020, 2021 by Kirill A. Korinsky <[email protected]>
+ *
+ * This work is released into the public domain with CC0 1.0.
+ */
+
+package ky.korins.sha
+
+private[sha] object Paddings {
+  def padding_32(message: Array[Byte]): Array[Byte] = {
+    val origLength = message.length
+    val tailLength = origLength & 0x3f
+    val padLength = if (tailLength < 56) 64 - tailLength else 128 - tailLength
+
+    val thePad = new Array[Byte](padLength)
+    thePad(0) = 0x80.toByte
+
+    val lengthInBits = origLength.toLong * 8
+    var i = 0
+    while (i < 8) {
+      thePad(thePad.length - 1 - i) = ((lengthInBits >>> (8 * i)) & 0xff).toByte
+      i += 1
+    }
+
+    val padded = new Array[Byte](origLength + padLength)
+    System.arraycopy(message, 0, padded, 0, origLength)
+    System.arraycopy(thePad, 0, padded, origLength, thePad.length)
+
+    padded
+  }
+
+  def padding_64(message: Array[Byte]): Array[Byte] = {
+    val origLength = message.length
+    val tailLength = origLength & 0x7f
+    val padLength = if (tailLength < 112) 128 - tailLength else 256 - tailLength
+
+    val thePad = new Array[Byte](padLength)
+    thePad(0) = 0x80.toByte
+
+    val lengthInBits = origLength.toLong * 8
+    var i = 0
+    while (i < 8) {
+      thePad(thePad.length - 1 - i) = ((lengthInBits >>> (8 * i)) & 0xff).toByte
+      i += 1
+    }
+
+    val padded = new Array[Byte](origLength + padLength)
+    System.arraycopy(message, 0, padded, 0, origLength)
+    System.arraycopy(thePad, 0, padded, origLength, thePad.length)
+
+    padded
+  }
+
+}