From e8703a41f8423e24f46155332dc24019ea885416 Mon Sep 17 00:00:00 2001
From: m5r <mokht@rmi.al>
Date: Sun, 22 May 2022 02:00:12 +0200
Subject: [PATCH] forgotten encryption stuff

---
 .env.example                |  3 ++-
 app/config/config.server.ts | 10 +++++++++-
 app/utils/encryption.ts     | 29 +++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 2 deletions(-)
 create mode 100644 app/utils/encryption.ts

diff --git a/.env.example b/.env.example
index ab39bf3..6e7b983 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,6 @@
 APP_BASE_URL=http://localhost:3000
-
+# crypto.scryptSync("je s'appelle groot", crypto.randomBytes(16), 32).toString("hex");
+MASTER_ENCRYPTION_KEY=97da37a1003158d7da3d8c10186e61423fd7fa56a4565e3ba4f093b8343780a9
 INVITATION_TOKEN_SECRET=0ded075524fd19fe467eb00480b8d5d4
 SESSION_SECRET=754a554f4cbf9254e50fda87b48ee52b
 
diff --git a/app/config/config.server.ts b/app/config/config.server.ts
index 3aa3751..11d1a15 100644
--- a/app/config/config.server.ts
+++ b/app/config/config.server.ts
@@ -20,13 +20,21 @@ invariant(
 	`Please define the "AWS_SES_FROM_EMAIL" environment variable`,
 );
 invariant(typeof process.env.REDIS_URL === "string", `Please define the "REDIS_URL" environment variable`);
-invariant(typeof process.env.TWILIO_AUTH_TOKEN === "string", `Please define the "TWILIO_AUTH_TOKEN" environment variable`);
+invariant(
+	typeof process.env.TWILIO_AUTH_TOKEN === "string",
+	`Please define the "TWILIO_AUTH_TOKEN" environment variable`,
+);
+invariant(
+	typeof process.env.MASTER_ENCRYPTION_KEY === "string",
+	`Please define the "MASTER_ENCRYPTION_KEY" environment variable`,
+);
 
 export default {
 	app: {
 		baseUrl: process.env.APP_BASE_URL,
 		invitationTokenSecret: process.env.INVITATION_TOKEN_SECRET,
 		sessionSecret: process.env.SESSION_SECRET,
+		encryptionKey: process.env.MASTER_ENCRYPTION_KEY,
 	},
 	awsSes: {
 		awsRegion: process.env.AWS_SES_REGION,
diff --git a/app/utils/encryption.ts b/app/utils/encryption.ts
new file mode 100644
index 0000000..6852e0d
--- /dev/null
+++ b/app/utils/encryption.ts
@@ -0,0 +1,29 @@
+import crypto from "crypto";
+
+import serverConfig from "~/config/config.server";
+
+const ivLength = 16;
+const algorithm = "aes-256-cbc";
+const encryptionKey = serverConfig.app.encryptionKey;
+
+export function encrypt(text: string) {
+	const encryptionKeyAsBuffer = Buffer.isBuffer(encryptionKey) ? encryptionKey : Buffer.from(encryptionKey, "hex");
+	const iv = crypto.randomBytes(ivLength);
+	const cipher = crypto.createCipheriv(algorithm, encryptionKeyAsBuffer, iv);
+	const encrypted = cipher.update(text);
+	const encryptedBuffer = Buffer.concat([encrypted, cipher.final()]);
+
+	return `${iv.toString("hex")}:${encryptedBuffer.toString("hex")}`;
+}
+
+export function decrypt(encryptedHexText: string) {
+	const encryptionKeyAsBuffer = Buffer.isBuffer(encryptionKey) ? encryptionKey : Buffer.from(encryptionKey, "hex");
+	const [hexIv, hexText] = encryptedHexText.split(":");
+	const iv = Buffer.from(hexIv!, "hex");
+	const encryptedText = Buffer.from(hexText!, "hex");
+	const decipher = crypto.createDecipheriv(algorithm, encryptionKeyAsBuffer, iv);
+	const decrypted = decipher.update(encryptedText);
+	const decryptedBuffer = Buffer.concat([decrypted, decipher.final()]);
+
+	return decryptedBuffer.toString();
+}