fix minor bugs. /cc @emilbayes

README.md

@@ -44,6 +44,11 @@ Update the hash with a new piece of data. `data` should be a buffer or uint8arra
 
 Digest the hash.
 
+#### `var promise = blake2b.ready([cb])`
+
+Wait for the WASM code to load. Returns the WebAssembly instance promise as well for convenience.
+You have to call this at least once before instantiating the hash.
+
 ## Browser demo
 
 There is a browser example included in [example.html](example.html) and [example.js](example.js).

index.js

@@ -19,8 +19,10 @@ var SALTBYTES = module.exports.SALTBYTES = 16
 var PERSONALBYTES = module.exports.PERSONALBYTES = 16
 
 function Blake2b (digestLength, key, salt, personal, noAssert) {
-  if (!(this instanceof Blake2b)) return new Blake2b(digestLength, key, salt, personal)
+  if (!(this instanceof Blake2b)) return new Blake2b(digestLength, key, salt, personal, noAssert)
   if (!mod) throw new Error('WASM not loaded. Wait for Blake2b.ready(cb)')
+  if (!digestLength) digestLength = 32
+
   if (noAssert !== true) {
     assert(digestLength >= BYTES_MIN, 'digestLength must be at least ' + BYTES_MIN + ', was given ' + digestLength)
     assert(digestLength <= BYTES_MAX, 'digestLength must be at most ' + BYTES_MAX + ', was given ' + digestLength)
@@ -35,7 +37,7 @@ function Blake2b (digestLength, key, salt, personal, noAssert) {
     head += 216
   }
 
-  this.digestLength = digestLength || 32
+  this.digestLength = digestLength
   this.finalized = false
   this.pointer = freeList.pop()
 

test.js

@@ -53,7 +53,7 @@ blake2b.ready(function () {
       var salt = vector.salt && Buffer.from(vector.salt, 'hex')
       var personal = vector.personal && Buffer.from(vector.personal, 'hex')
 
-      var hash = blake2b(vector.outlen, key, salt, personal)
+      var hash = blake2b(vector.outlen, key, salt, personal, true)
         .update(Buffer.from(vector.input, 'hex'))
         .digest('hex')