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worker: add GitHub secret encryption utility #34

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Merged
MekDrop merged 1 commit into from
Apr 23, 2026
Merged

worker: add GitHub secret encryption utility #34

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1 change: 1 addition & 0 deletions worker/.eslintrc.cjs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
module.exports = {
env: {
browser: true,
es2021: true,
},
extends: ['eslint:recommended'],
parserOptions: {
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14 changes: 14 additions & 0 deletions worker/src/services/crypto.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
import { box } from 'tweetnacl'

export async function encryptForGitHub(base64PublicKey, secretValue) {
const repoKey = Uint8Array.from(atob(base64PublicKey), (c) => c.charCodeAt(0))
const ephemeral = box.keyPair()
const nonce = crypto.getRandomValues(new Uint8Array(24))
const msg = new TextEncoder().encode(secretValue)
const sealed = box(msg, nonce, repoKey, ephemeral.secretKey)
const out = new Uint8Array(ephemeral.publicKey.length + nonce.length + sealed.length)
out.set(ephemeral.publicKey, 0)
out.set(nonce, ephemeral.publicKey.length)
out.set(sealed, ephemeral.publicKey.length + nonce.length)
return btoa(String.fromCharCode(...out))
}
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