fix: fail to import invalid PEM formatted strings and buffers

Author: panva

lib/jwk/import.js

@@ -67,7 +67,11 @@ const importKey = (key, parameters) => {
       publicKey = createPublicKey(key)
     } catch (err) {}
     try {
-      secret = createSecretKey(Buffer.isBuffer(key) ? key : Buffer.from(key))
+      // this is to filter out invalid PEM keys and certs, i'll rather have them fail import then
+      // have them imported as symmetric "oct" keys
+      if (!key.includes('-----BEGIN')) {
+        secret = createSecretKey(Buffer.isBuffer(key) ? key : Buffer.from(key))
+      }
     } catch (err) {}
   }
 

test/jwk/import.test.js

@@ -37,6 +37,16 @@ test('parameters must be a plain object', t => {
 })
 
 Object.entries(fixtures.PEM).forEach(([type, { private: priv, public: pub }]) => {
+  test(`fails to import ${type} as invalid string`, t => {
+    t.throws(() => {
+      importKey(priv.toString('ascii').replace(/\n/g, ''))
+    }, { instanceOf: errors.JWKImportFailed, code: 'ERR_JWK_IMPORT_FAILED' })
+  })
+  test(`fails to import ${type} as invalid buffer`, t => {
+    t.throws(() => {
+      importKey(Buffer.from(priv.toString('ascii').replace(/\n/g, '')))
+    }, { instanceOf: errors.JWKImportFailed, code: 'ERR_JWK_IMPORT_FAILED' })
+  })
   test(`${type} private can be imported as a string`, t => {
     const k = importKey(priv.toString('ascii'))
     t.true(k.private)