jose/test/jwe/flattened.decrypt.test.mjs

import test from 'ava'
import * as crypto from 'crypto'

const root = !('WEBCRYPTO' in process.env) ? '#dist' : '#dist/webcrypto'
Promise.all([
  import(`${root}/jwe/flattened/encrypt`),
  import(`${root}/jwe/flattened/decrypt`),
]).then(
  ([{ FlattenedEncrypt }, { flattenedDecrypt }]) => {
    test.before(async (t) => {
      const encode = TextEncoder.prototype.encode.bind(new TextEncoder())
      t.context.plaintext = encode('It’s a dangerous business, Frodo, going out your door.')
      t.context.additionalAuthenticatedData = encode('The Fellowship of the Ring')
      t.context.initializationVector = new Uint8Array(12)
      t.context.secret = new Uint8Array(16)
    })

    test('JWE format validation', async (t) => {
      const fullJwe = await new FlattenedEncrypt(t.context.plaintext)
        .setProtectedHeader({ bar: 'baz' })
        .setUnprotectedHeader({ foo: 'bar' })
        .setSharedUnprotectedHeader({ alg: 'dir', enc: 'A128GCM' })
        .setAdditionalAuthenticatedData(t.context.additionalAuthenticatedData)
        .encrypt(t.context.secret)

      {
        await t.throwsAsync(flattenedDecrypt(null, t.context.secret), {
          message: 'Flattened JWE must be an object',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        delete jwe.protected
        delete jwe.header
        delete jwe.unprotected

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JOSE Header missing',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        delete jwe.iv
        const assertion = {
          message: 'JWE Initialization Vector missing or incorrect type',
          code: 'ERR_JWE_INVALID',
        }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
        jwe.iv = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
      }

      {
        const jwe = { ...fullJwe }
        delete jwe.ciphertext
        const assertion = {
          message: 'JWE Ciphertext missing or incorrect type',
          code: 'ERR_JWE_INVALID',
        }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
        jwe.ciphertext = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
      }

      {
        const jwe = { ...fullJwe }
        delete jwe.tag
        const assertion = {
          message: 'JWE Authentication Tag missing or incorrect type',
          code: 'ERR_JWE_INVALID',
        }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
        jwe.tag = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
      }

      {
        const jwe = { ...fullJwe }
        jwe.protected = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JWE Protected Header incorrect type',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        const assertion = {
          message: 'JWE Protected Header is invalid',
          code: 'ERR_JWE_INVALID',
        }
        jwe.protected = `1${jwe.protected}`
        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), assertion)
      }

      {
        const jwe = { ...fullJwe }
        jwe.encrypted_key = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JWE Encrypted Key incorrect type',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.aad = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JWE AAD incorrect type',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.header = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JWE Shared Unprotected Header incorrect type',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.unprotected = null

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'JWE Per-Recipient Unprotected Header incorrect type',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.unprotected = { foo: 'bar' }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message:
            'JWE Protected, JWE Unprotected Header, and JWE Per-Recipient Unprotected Header Parameter names must be disjoint',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.unprotected = { enc: 'A128GCM' }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'missing JWE Algorithm (alg) in JWE Header',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.unprotected = { alg: 'dir' }

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'missing JWE Encryption Algorithm (enc) in JWE Header',
          code: 'ERR_JWE_INVALID',
        })
      }

      {
        const jwe = { ...fullJwe }
        jwe.encrypted_key = 'foo'

        await t.throwsAsync(flattenedDecrypt(jwe, t.context.secret), {
          message: 'decryption operation failed',
          code: 'ERR_JWE_DECRYPTION_FAILED',
        })
      }
    })

    test('AES CBC + HMAC', async (t) => {
      const secret = crypto.randomFillSync(new Uint8Array(32))
      const jwe = await new FlattenedEncrypt(t.context.plaintext)
        .setProtectedHeader({ alg: 'dir', enc: 'A128CBC-HS256' })
        .encrypt(secret)

      {
        const jweBadTag = { ...jwe }
        jweBadTag.tag = 'foo'
        await t.throwsAsync(flattenedDecrypt(jweBadTag, secret), {
          code: 'ERR_JWE_DECRYPTION_FAILED',
          message: 'decryption operation failed',
        })
      }

      {
        const jweBadEnc = { ...jwe }
        jweBadEnc.ciphertext = 'foo'
        await t.throwsAsync(flattenedDecrypt(jweBadEnc, secret), {
          code: 'ERR_JWE_DECRYPTION_FAILED',
          message: 'decryption operation failed',
        })
      }

      {
        const altSecret = new Uint8Array(32)
        altSecret.set(secret.slice(0, 16), 16)
        altSecret.set(secret.slice(16), 0)
        await t.throwsAsync(flattenedDecrypt(jwe, altSecret), {
          code: 'ERR_JWE_DECRYPTION_FAILED',
          message: 'decryption operation failed',
        })
      }
    })
  },
  (err) => {
    test('failed to import', (t) => {
      console.error(err)
      t.fail()
    })
  },
)