Tauri Code Signing Skill

This skill provides comprehensive guidance for code signing Tauri applications across all supported platforms.

Platform Overview

Android Signing

Generate Keystore

macOS/Linux:

keytool -genkey -v -keystore ~/upload-keystore.jks -keyalg RSA -keysize 2048 -validity 10000 -alias upload

Windows:

keytool -genkey -v -keystore $env:USERPROFILE\upload-keystore.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias upload

Configuration File

Create src-tauri/gen/android/keystore.properties:

password=<your-password>
keyAlias=upload
storeFile=/path/to/upload-keystore.jks

IMPORTANT: Never commit keystore.properties to version control.

Gradle Configuration

Modify src-tauri/gen/android/app/build.gradle.kts:

import java.io.FileInputStream

// Add before android { } block
val keystorePropertiesFile = rootProject.file("keystore.properties")
val keystoreProperties = java.util.Properties()
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(FileInputStream(keystorePropertiesFile))
}

android {
    // ... existing config ...

    signingConfigs {
        create("release") {
            keyAlias = keystoreProperties["keyAlias"] as String
            keyPassword = keystoreProperties["password"] as String
            storeFile = file(keystoreProperties["storeFile"] as String)
            storePassword = keystoreProperties["password"] as String
        }
    }

    buildTypes {
        release {
            signingConfig = signingConfigs.getByName("release")
            // ... other release config ...
        }
    }
}

CI/CD Environment Variables

GitHub Actions Example:

- name: Setup Android signing
  run: |
    cd src-tauri/gen/android
    echo "keyAlias=${{ secrets.ANDROID_KEY_ALIAS }}" > keystore.properties
    echo "password=${{ secrets.ANDROID_KEY_PASSWORD }}" >> keystore.properties
    base64 -d <<< "${{ secrets.ANDROID_KEY_BASE64 }}" > $RUNNER_TEMP/keystore.jks
    echo "storeFile=$RUNNER_TEMP/keystore.jks" >> keystore.properties

iOS Signing

Prerequisites

• Apple Developer Program enrollment ($99/year)
• Bundle identifier registered in App Store Connect
• iOS code signing certificate
• Mobile provisioning profile

Automatic Signing (Recommended)

For local development, authenticate through Xcode Settings > Accounts.

For CI/CD, create an App Store Connect API key and set:

Manual Signing

Certificate Types by Distribution Method

Export Certificate

1. Open Keychain Access
2. Find your certificate
3. Right-click the private key
4. Select “Export” and save as .p12
5. Convert to base64: base64 -i certificate.p12

Create Provisioning Profile

1. Register App ID with matching bundle identifier
2. Create provisioning profile for your distribution method
3. Link certificate to profile
4. Download and convert: base64 -i profile.mobileprovision

Linux Signing (AppImage)

Generate GPG Key

gpg2 --full-gen-key

Back up the key securely.

Environment Variables

Build with Signing

SIGN=1 APPIMAGETOOL_SIGN_PASSPHRASE="your-passphrase" npm run tauri build

View Embedded Signature

./src-tauri/target/release/bundle/appimage/app_version_amd64.AppImage --appimage-signature

Validate Signature

Download the validate tool from AppImageUpdate releases:

chmod +x validate-x86_64.AppImage
./validate-x86_64.AppImage your-app.AppImage

Note: AppImage does not auto-validate signatures. Users must manually verify.

macOS Signing and Notarization

Prerequisites

• Apple Developer Program enrollment ($99/year)
• Mac computer for code signing
• Free accounts cannot notarize applications

Certificate Types

Create Certificate

1. Generate Certificate Signing Request (CSR) from Keychain Access
2. Upload CSR at Apple Developer > Certificates, IDs & Profiles
3. Download and double-click .cer to install

Configuration

tauri.conf.json:

{
  "bundle": {
    "macOS": {
      "signingIdentity": "Developer ID Application: Your Name (TEAM_ID)"
    }
  }
}

Environment Variables for CI/CD

Certificate Variables:

Notarization – Option 1: App Store Connect API (Recommended):

Notarization – Option 2: Apple ID:

Export Certificate for CI/CD

# Export from Keychain as .p12, then:
base64 -i certificate.p12 | pbcopy

Ad-Hoc Signing (Testing Only)

For unsigned distribution or testing without Apple credentials:

{
  "bundle": {
    "macOS": {
      "signingIdentity": "-"
    }
  }
}

GitHub Actions Example

- name: Import certificate
  env:
    APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
    APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
  run: |
    echo $APPLE_CERTIFICATE | base64 --decode > certificate.p12
    security create-keychain -p actions temp.keychain
    security import certificate.p12 -k temp.keychain -P $APPLE_CERTIFICATE_PASSWORD -T /usr/bin/codesign
    security list-keychains -s temp.keychain
    security unlock-keychain -p actions temp.keychain
    security set-key-partition-list -S apple-tool:,apple: -s -k actions temp.keychain

Windows Signing

Certificate Types

Note: Certificates obtained after June 1, 2023 require EV certificates for immediate SmartScreen trust.

Configuration

tauri.conf.json:

{
  "bundle": {
    "windows": {
      "certificateThumbprint": "A1B1A2B2A3B3A4B4A5B5A6B6A7B7A8B8A9B9A0B0",
      "digestAlgorithm": "sha256",
      "timestampUrl": "http://timestamp.sectigo.com"
    }
  }
}

Find Certificate Thumbprint

1. Open certificate details
2. Go to Details tab
3. Find “Thumbprint” field
4. Copy the hex string (remove spaces)

Common Timestamp URLs

• http://timestamp.sectigo.com
• http://timestamp.digicert.com
• http://timestamp.globalsign.com

Convert Certificate to PFX

openssl pkcs12 -export -in cert.cer -inkey private-key.key -out certificate.pfx

Environment Variables for CI/CD

GitHub Actions Example

- name: Import Windows certificate
  env:
    WINDOWS_CERTIFICATE: ${{ secrets.WINDOWS_CERTIFICATE }}
    WINDOWS_CERTIFICATE_PASSWORD: ${{ secrets.WINDOWS_CERTIFICATE_PASSWORD }}
  run: |
    echo "$WINDOWS_CERTIFICATE" | base64 --decode > certificate.pfx
    Import-PfxCertificate -FilePath certificate.pfx -CertStoreLocation Cert:\CurrentUser\My -Password (ConvertTo-SecureString -String $env:WINDOWS_CERTIFICATE_PASSWORD -AsPlainText -Force)
  shell: pwsh

Azure Key Vault Signing

For cloud-based signing with Azure Key Vault:

Configure in tauri.conf.json:

{
  "bundle": {
    "windows": {
      "signCommand": "relic sign --key azurekeyvault --file %1"
    }
  }
}

Azure Trusted Signing

For Azure Code Signing service:

{
  "bundle": {
    "windows": {
      "signCommand": "trusted-signing-cli -e <endpoint> -a <account> -c <profile> %1"
    }
  }
}

Custom Sign Command

For other signing tools or cross-platform builds:

{
  "bundle": {
    "windows": {
      "signCommand": "your-signing-tool --sign %1"
    }
  }
}

The %1 placeholder is replaced with the executable path.

Quick Reference: All Environment Variables

Android

• ANDROID_KEY_ALIAS
• ANDROID_KEY_PASSWORD
• ANDROID_KEY_BASE64

iOS (Manual)

• IOS_CERTIFICATE
• IOS_CERTIFICATE_PASSWORD
• IOS_MOBILE_PROVISION

iOS/macOS (API Key)

• APPLE_API_ISSUER
• APPLE_API_KEY
• APPLE_API_KEY_PATH

macOS (Certificate)

• APPLE_CERTIFICATE
• APPLE_CERTIFICATE_PASSWORD
• APPLE_SIGNING_IDENTITY

macOS (Apple ID Notarization)

• APPLE_ID
• APPLE_PASSWORD
• APPLE_TEAM_ID

Linux

• SIGN
• SIGN_KEY
• APPIMAGETOOL_SIGN_PASSPHRASE
• APPIMAGETOOL_FORCE_SIGN

Windows

• WINDOWS_CERTIFICATE
• WINDOWS_CERTIFICATE_PASSWORD

Azure (Windows)

• AZURE_CLIENT_ID
• AZURE_CLIENT_SECRET
• AZURE_TENANT_ID