From 5cc19ce053338dbc0b1ffdc4b43122479e641837 Mon Sep 17 00:00:00 2001
From: zotlabs <mike@macgirvin.com>
Date: Wed, 26 Sep 2018 16:39:08 -0700
Subject: jsonld signature issue (library is using sha1, spec requires sha256)

---
 library/jsonld/jsonld.php | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/library/jsonld/jsonld.php b/library/jsonld/jsonld.php
index 28b3e7ce3..8cd3e7ceb 100644
--- a/library/jsonld/jsonld.php
+++ b/library/jsonld/jsonld.php
@@ -4301,7 +4301,7 @@ class JsonLdProcessor {
     sort($nquads);
 
     // cache and return hashed quads
-    $hash = $bnodes->{$id}->hash = sha1(implode($nquads));
+    $hash = $bnodes->{$id}->hash = hash('sha256',implode($nquads));
     return $hash;
   }
 
@@ -4320,8 +4320,8 @@ class JsonLdProcessor {
    * @return stdClass the hash and path namer used.
    */
   protected function _hashPaths($id, $bnodes, $namer, $path_namer) {
-    // create SHA-1 digest
-    $md = hash_init('sha1');
+    // create digest
+    $md = hash_init('sha256');
 
     // group adjacent bnodes by hash, keep properties and references separate
     $groups = new stdClass();
@@ -4350,7 +4350,7 @@ class JsonLdProcessor {
         }
 
         // hash direction, property, and bnode name/hash
-        $group_md = hash_init('sha1');
+        $group_md = hash_init('sha256');
         hash_update($group_md, $direction);
         hash_update($group_md, $quad->predicate->value);
         hash_update($group_md, $name);
@@ -4433,7 +4433,7 @@ class JsonLdProcessor {
       $path_namer = $chosen_namer;
     }
 
-    // return SHA-1 hash and path namer
+    // return hash and path namer
     return (object)array(
       'hash' => hash_final($md), 'pathNamer' => $path_namer);
   }
-- 
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