Edit File: aes_gcm_kw.js
const generateIV = require('../help/generate_iv') const base64url = require('../help/base64url') module.exports = (JWA, JWK) => { ['A128GCMKW', 'A192GCMKW', 'A256GCMKW'].forEach((jwaAlg) => { const encAlg = jwaAlg.substr(0, 7) const size = parseInt(jwaAlg.substr(1, 3), 10) const encrypt = JWA.encrypt.get(encAlg) const decrypt = JWA.decrypt.get(encAlg) if (encrypt && decrypt) { JWA.keyManagementEncrypt.set(jwaAlg, (key, payload) => { const iv = generateIV(jwaAlg) const { ciphertext, tag } = encrypt(key, payload, { iv }) return { wrapped: ciphertext, header: { tag: base64url.encodeBuffer(tag), iv: base64url.encodeBuffer(iv) } } }) JWA.keyManagementDecrypt.set(jwaAlg, decrypt) JWK.oct.wrapKey[jwaAlg] = JWK.oct.unwrapKey[jwaAlg] = key => (key.use === 'enc' || key.use === undefined) && key.length === size } }) }
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