From 7addaed9e7ef3eaa0d1273a2786044d78d3df0e2 Mon Sep 17 00:00:00 2001
From: Pavel Prichodko <14926950+prichodko@users.noreply.github.com>
Date: Sat, 4 Jun 2022 13:09:31 +0200
Subject: [PATCH] add generateKeyFromPassword

---
 .../utils/generate-key-from-password.test.ts  | 24 +++++++++++++++++++
 .../src/utils/generate-key-from-password.ts   | 19 +++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 packages/status-js/src/utils/generate-key-from-password.test.ts
 create mode 100644 packages/status-js/src/utils/generate-key-from-password.ts

diff --git a/packages/status-js/src/utils/generate-key-from-password.test.ts b/packages/status-js/src/utils/generate-key-from-password.test.ts
new file mode 100644
index 00000000..3308b642
--- /dev/null
+++ b/packages/status-js/src/utils/generate-key-from-password.test.ts
@@ -0,0 +1,24 @@
+import { bytesToHex } from 'ethereum-cryptography/utils'
+
+import { generateKeyFromPassword } from './generate-key-from-password'
+
+describe('createSymKeyFromPassword', () => {
+  it('should create symmetric key from password', async () => {
+    const password = 'password'
+    const symKey = await generateKeyFromPassword(password)
+
+    expect(bytesToHex(symKey)).toEqual(
+      'c49ad65ebf2a7b7253bf400e3d27719362a91b2c9b9f54d50a69117021666c33'
+    )
+  })
+
+  it('should generate symmetric key from chat ID', async () => {
+    const chatId =
+      '0x02dcec6041fb999d65f1d33363e08c93d3c1f6f0fbbb26add383e2cf46c2b921f41dc14fd8-9a8b-4df5-a358-2c3067be5439'
+    const symKey = await generateKeyFromPassword(chatId)
+
+    expect(bytesToHex(symKey)).toEqual(
+      '76ff5bf0a74a8e724367c7fc003f066d477641f468768a8da2817addf5c2ce76'
+    )
+  })
+})
diff --git a/packages/status-js/src/utils/generate-key-from-password.ts b/packages/status-js/src/utils/generate-key-from-password.ts
new file mode 100644
index 00000000..564d4c7b
--- /dev/null
+++ b/packages/status-js/src/utils/generate-key-from-password.ts
@@ -0,0 +1,19 @@
+import { pbkdf2 } from 'ethereum-cryptography/pbkdf2'
+import { hexToBytes, utf8ToBytes } from 'ethereum-cryptography/utils'
+
+const AES_KEY_LENGTH = 32 // bytes
+
+/**
+ * status-go: https://github.com/status-im/status-go/blob/a471fed6a64e01a1aba8d925377fba045a5aa9f9/wakuv2/waku.go#L713
+ */
+export async function generateKeyFromPassword(
+  password: string
+): Promise<Uint8Array> {
+  return await pbkdf2(
+    hexToBytes(password),
+    utf8ToBytes(''),
+    65356,
+    AES_KEY_LENGTH,
+    'sha256'
+  )
+}