Implement boxes

test/boxes/symmetric.test.ts

@@ -0,0 +1,57 @@
+import {expect, test} from 'bun:test'
+
+import * as symmetric from 'boxes/symmetric'
+
+test('base case', async () => {
+    const key = await symmetric.SecretBox.gen_key()
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await symmetric.SecretBox.encrypt<Uint8Array>(key, data)).expect("Should encrypt the data")
+    const result = (await box.decrypt(key)).expect("Should decrypt the data")
+
+    expect(result).toEqual(data)
+})
+
+test('toString and fromString are inverses', async () => {
+    const key = await symmetric.SecretBox.gen_key()
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await symmetric.SecretBox.encrypt<Uint8Array>(key, data)).expect("Should encrypt the data")
+    const str = box.toString()
+    const box2 = symmetric.SecretBox.fromString<Uint8Array>(str).expect("Should parse the string")
+    expect(box).toEqual(box2)
+    const plain = (await box2.decrypt(key)).expect("Should decrypt the data")
+
+    expect(plain).toEqual(data)
+})
+
+test('tampered cipher fails', async () => {
+    const key = await symmetric.SecretBox.gen_key()
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await symmetric.SecretBox.encrypt<Uint8Array>(key, data)).expect("Should encrypt the data")
+    // @ts-expect-error : This is a test, so it's OK to access private field
+    box.cipher[0] += 1
+
+    ;(await box.decrypt(key)).expect_err("Should fail to decrypt the data")
+})
+
+test('Wrong key fails', async () => {
+    const key1 = await symmetric.SecretBox.gen_key()
+    const key2 = await symmetric.SecretBox.gen_key()
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await symmetric.SecretBox.encrypt(key1, data)).expect("Should encrypt the data")
+    ;(await box.decrypt(key2)).expect_err("Should fail to decrypt the data")
+})
+
+test('tampered IV fails', async () => {
+    const key = await symmetric.SecretBox.gen_key()
+    const data = new Uint8Array([1, 2, 3, 4, 5])
+
+    const box = (await symmetric.SecretBox.encrypt<Uint8Array>(key, data)).expect("Should encrypt the data")
+    // @ts-expect-error : This is a test, so it's OK to access private field
+    box.iv[0] += 1
+
+    ;(await box.decrypt(key)).expect_err("Should fail to decrypt the data")
+})