Implement pwd box

test/boxes/pwd.test.ts

@@ -0,0 +1,52 @@
+import {expect, test} from 'bun:test'
+
+import * as pwd from 'boxes/pwd'
+
+test('base case', async () => {
+    const password = "AwesomePassword123!"
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = await pwd.PwdBox.encrypt<Uint8Array>(password, data)
+    const result = (await box.decrypt(password)).expect("Should decrypt the data")
+
+    expect(result).toEqual(data)
+})
+
+test('wrong password', async () => {
+    const password1 = "AwesomePassword123!"
+    const password2 = "AwesomePassword321!"
+    expect(password1).not.toEqual(password2)
+
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = await pwd.PwdBox.encrypt<Uint8Array>(password1, data)
+
+    ;(await box.decrypt(password2)).expect_err("Should not decrypt the data with the wrong password")
+})
+
+test('toString and fromString are inverses', async () => {
+    const password = "AwesomePassword123!"
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = await pwd.PwdBox.encrypt<Uint8Array>(password, data)
+
+    const str = box.toString()
+    const box2 = pwd.PwdBox.fromString<Uint8Array>(str).expect("Should be able to parse the string")
+    expect(box2).toEqual(box)
+
+    const result = (await box2.decrypt(password)).expect("Should decrypt the data")
+
+    expect(result).toEqual(data)
+})
+
+test('tampered salt should fail', async () => {
+    const password = "AwesomePassword123!"
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = await pwd.PwdBox.encrypt<Uint8Array>(password, data)
+
+    // @ts-expect-error : I know salt is private, but I want to test it
+    box.salt[0] += 1
+
+    ;(await box.decrypt(password)).expect_err("Should not decrypt the data with a tampered salt")
+})