1 files changed, 19 insertions, 0 deletions
diff --git a/helpers/crypt.js b/helpers/crypt.js
new file mode 100644
index 0000000..5d3d79e
--- /dev/null
+++ b/helpers/crypt.js
@@ -0,0 +1,19 @@
+const crypto = require('crypto')
+const algorithm = 'aes-256-ctr'
+const secretKey = process.env.MYAPPS_NOTES_KEY
+
+export const encrypt = (text) => {
+  const iv = crypto.randomBytes(16)
+  const cipher = crypto.createCipheriv(algorithm, secretKey, iv)
+  const encrypted = Buffer.concat([cipher.update(text), cipher.final()])
+
+  return iv.toString('hex') + '::' + encrypted.toString('hex')
+}
+
+export const decrypt = (hash) => {
+  const [iv, content] = hash.split('::')
+  const decipher = crypto.createDecipheriv(algorithm, secretKey, Buffer.from(iv, 'hex'))
+  const decrpyted = Buffer.concat([decipher.update(Buffer.from(content, 'hex')), decipher.final()])
+
+  return decrpyted.toString();
+}