fix(files): ensure CID in cat() command is only cleaned when input is valid

Fixes #799

License: MIT
Signed-off-by: Pascal Precht [email protected]

Author: 0x-r4bbit

src/files/cat.js

@@ -4,6 +4,11 @@ const promisify = require('promisify-es6')
 const cleanCID = require('../utils/clean-cid')
 const v = require('is-ipfs')
 const bl = require('bl')
+const CID = require('cids')
+
+function checkValidInput (input) {
+  return (typeof input === 'string' && (v.cid(input) || v.ipfsPath(input))) || (Buffer.isBuffer(input) || CID.isCID(input))
+}
 
 module.exports = (send) => {
   return promisify((hash, opts, callback) => {
@@ -13,7 +18,9 @@ module.exports = (send) => {
     }
 
     try {
-      hash = cleanCID(hash)
+      if (checkValidInput(hash)) {
+        hash = cleanCID(hash)
+      }
     } catch (err) {
       if (!v.ipfsPath(hash)) {
         return callback(err)