Implement asym box

test/boxes/asymmetric.test.ts

@@ -0,0 +1,56 @@
+import {beforeAll, expect, test} from 'bun:test'
+
+import * as asymmetric from 'boxes/asymmetric'
+
+let k1!: [asymmetric.PrivKey, asymmetric.PubKey];
+let k2!: [asymmetric.PrivKey, asymmetric.PubKey];
+
+beforeAll(async () => {
+    k1 = await asymmetric.PrivateBox.gen_keypair(false)
+    k2 = await asymmetric.PrivateBox.gen_keypair(true)
+
+    expect(k1[0].extractable).toBe(false)
+    expect(k1[1].extractable).toBe(true)
+    expect(k2[0].extractable).toBe(true)
+    expect(k2[1].extractable).toBe(true)
+})
+
+test('base case', async () => {
+    const [priv, pub] = k1
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await asymmetric.PrivateBox.encrypt<Uint8Array>(pub, data)).expect("Should encrypt the data")
+    const result = (await box.decrypt(priv)).expect("Should decrypt the data")
+
+    expect(result).toEqual(data)
+})
+
+test('toString and fromString are inverses', async () => {
+    const [priv, pub] = k1
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await asymmetric.PrivateBox.encrypt<Uint8Array>(pub, data)).expect("Should encrypt the data")
+    const str = box.toString()
+    const box2 = asymmetric.PrivateBox.fromString<Uint8Array>(str).expect("Should parse the string")
+    const plain = (await box2.decrypt(priv)).expect("Should decrypt the data")
+
+    expect(plain).toEqual(data)
+})
+
+test('Tampered cipher fails', async () => {
+    const [priv, pub] = k1
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await asymmetric.PrivateBox.encrypt<Uint8Array>(pub, data)).expect("Should encrypt the data")
+    box.cipher[0] += 1
+    ;(await box.decrypt(priv)).expect_err("Should fail to decrypt the data")
+})
+
+test('Wrong pubkey should fail', async () => {
+    const [_priv, pub] = k1
+    const [priv, _pub] = k2
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await asymmetric.PrivateBox.encrypt(pub, data)).expect("Should encrypt the data")
+    ;(await box.decrypt(priv)).expect_err("Should fail to decrypt the data")
+})