Merge pull request #302 from ph4r05/bigHashException

If hashing more than 2^53-1 bits, throw exception, #299

3 files changed, 11 insertions, 0 deletions

diff --git a/core/sha1.js b/core/sha1.js
index 806baf1..b56d749 100644
--- a/core/sha1.js
+++ b/core/sha1.js
@@ -60,6 +60,10 @@ sjcl.hash.sha1.prototype = {
     var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
         ol = this._length,
         nl = this._length = ol + sjcl.bitArray.bitLength(data);
+    if (nl > 9007199254740991){
+      throw new sjcl.exception.invalid("Cannot hash more than 2^53 - 1 bits");
+    }
+
     if (typeof Uint32Array !== 'undefined') {
 	var c = new Uint32Array(b);
     	var j = 0;
diff --git a/core/sha256.js b/core/sha256.js
index c058538..22ff4d8 100644
--- a/core/sha256.js
+++ b/core/sha256.js
@@ -68,6 +68,9 @@ sjcl.hash.sha256.prototype = {
     var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
         ol = this._length,
         nl = this._length = ol + sjcl.bitArray.bitLength(data);
+    if (nl > 9007199254740991){
+      throw new sjcl.exception.invalid("Cannot hash more than 2^53 - 1 bits");
+    }
 
     if (typeof Uint32Array !== 'undefined') {
 	var c = new Uint32Array(b);
diff --git a/core/sha512.js b/core/sha512.js
index 4b4e7a6..32da101 100644
--- a/core/sha512.js
+++ b/core/sha512.js
@@ -68,6 +68,10 @@ sjcl.hash.sha512.prototype = {
     var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
         ol = this._length,
         nl = this._length = ol + sjcl.bitArray.bitLength(data);
+    if (nl > 9007199254740991){
+      throw new sjcl.exception.invalid("Cannot hash more than 2^53 - 1 bits");
+    }
+
     if (typeof Uint32Array !== 'undefined') {
         var c = new Uint32Array(b);
         var j = 0;