Feat/Java port of the SAKE handshake

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+
+[*.{java,kt,kts}]
+indent_size = 4
+
+[*.{xml,yml,yaml}]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false

.github/workflows/build.yml

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+name: build
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out source
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '17'
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build and test
+        run: ./gradlew build --no-daemon
+
+      - name: Upload test reports on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-reports
+          path: lib/build/reports/tests/test/
+          retention-days: 7

.gitignore

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+# Gradle
+.gradle/
+build/
+out/
+
+# IDE
+.idea/
+*.iml
+*.ipr
+*.iws
+.classpath
+.project
+.settings/
+.vscode/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log

README.md

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+# JavaSake
+
+Java port of the SAKE handshake protocol used by 700-series Medtronic pumps.
+
+Mirrors the public surface of [PythonSake](https://github.com/OpenMinimed/PythonSake)
+so it can be consumed by the [JavaPumpConnector](https://github.com/OpenMinimed/JavaPumpConnector)
+Android application (and any other JVM project that needs to drive a SAKE handshake).
+
+## Build
+
+```sh
+./gradlew build
+```
+
+## Test
+
+```sh
+./gradlew test
+```
+
+Requires JDK 11 or later.
+
+## License
+
+GPL-3.0. See [`LICENSE`](LICENSE).

build.gradle.kts

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+// Root project intentionally has no plugins applied.
+// See `lib/build.gradle.kts` for the library configuration.

gradle.properties

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+org.gradle.parallel=true
+org.gradle.caching=true
+org.gradle.jvmargs=-Xmx2g -Dfile.encoding=UTF-8

gradle/libs.versions.toml

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+[versions]
+junit = "5.11.3"
+junitPlatform = "1.11.3"
+bouncycastle = "1.79"
+spotless = "6.25.0"
+googleJavaFormat = "1.22.0"
+
+[libraries]
+junit-jupiter-api = { group = "org.junit.jupiter", name = "junit-jupiter-api", version.ref = "junit" }
+junit-jupiter-engine = { group = "org.junit.jupiter", name = "junit-jupiter-engine", version.ref = "junit" }
+junit-platform-launcher = { group = "org.junit.platform", name = "junit-platform-launcher", version.ref = "junitPlatform" }
+bouncycastle = { group = "org.bouncycastle", name = "bcprov-jdk18on", version.ref = "bouncycastle" }
+
+[plugins]
+spotless = { id = "com.diffplug.spotless", version.ref = "spotless" }

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionSha256Sum=a17ddd85a26b6a7f5ddb71ff8b05fc5104c0202c6e64782429790c933686c806
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists