Remove buffer dependency.

src/decrypt.ts

@@ -2,7 +2,7 @@ import { cryptoAeadDecrypt } from './romulus-m'
 
 interface DecryptResult {
   success: boolean
-  plaintext: Buffer
+  plaintext: Uint8Array
 }
 
 /**
@@ -13,7 +13,7 @@ interface DecryptResult {
  * @param key The encryption key.
  * @returns A decrypted DecryptResult object.
  */
-export function decrypt (buffer: Buffer, associatedData: Buffer, key: Buffer): DecryptResult {
+export function decrypt (buffer: Uint8Array, associatedData: Uint8Array, key: Uint8Array): DecryptResult {
   // Split nonce from ciphertext.
   const nonce = Array.from(buffer.slice(0, 16))
   const ciphertext = Array.from(buffer.slice(16))
@@ -24,6 +24,6 @@ export function decrypt (buffer: Buffer, associatedData: Buffer, key: Buffer): D
   // Return the ciphertext and decryption status.
   return {
     success: result.success,
-    plaintext: Buffer.from(result.plaintext)
+    plaintext: Uint8Array.from(result.plaintext)
   }
 }

src/encrypt.ts

@@ -9,14 +9,14 @@ import { v4 as uuidv4 } from 'uuid'
  * @param key The encryption key.
  * @returns The nonce-prepended ciphertext.
  */
-export function encrypt (message: Buffer, associatedData: Buffer, key: Buffer): Buffer {
+export function encrypt (message: Uint8Array, associatedData: Uint8Array, key: Uint8Array): Uint8Array {
   // Generate a nonce.
-  const nonce = Buffer.alloc(16)
+  const nonce = new Uint8Array(16)
   uuidv4({}, nonce)
 
   // Encrypt the data using the associated data, newly generated nonce and encryption key.
-  const ciphertext = Buffer.from(cryptoAeadEncrypt(Array.from(message), Array.from(associatedData), Array.from(nonce), Array.from(key)))
+  const ciphertext = Uint8Array.from(cryptoAeadEncrypt(Array.from(message), Array.from(associatedData), Array.from(nonce), Array.from(key)))
 
   // Return the nonce-prepended ciphertext.
-  return Buffer.concat([nonce, ciphertext])
+  return new Uint8Array([...nonce, ...ciphertext])
 }