Support for array based input. Fixes #1.

src/md4.js

@@ -32,7 +32,8 @@
 
   var md4 = function(message) {
     var h0, h1, h2, h3, a, b, c, d, ab, bc, cd, da, code, first = true, end = false,
-        index = 0, i, start = 0, bytes = 0, length = message.length;
+        index = 0, i, start = 0, bytes = 0, length = message.length,
+        array = (ARRAY_BUFFER ? ArrayBuffer.isView(message) : false) || message instanceof Array;
 
     blocks[16] = 0;
     do {
@@ -41,7 +42,12 @@
       blocks[4] = blocks[5] = blocks[6] = blocks[7] =
       blocks[8] = blocks[9] = blocks[10] = blocks[11] =
       blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
-      if(ARRAY_BUFFER) {
+      if (ARRAY_BUFFER) {
+        if (array) {
+          for (i = start;index < length && i < 64; ++index) {
+            buffer8[i++] = message[index];
+          }
+        } else {
           for (i = start;index < length && i < 64; ++index) {
             code = message.charCodeAt(index);
             if (code < 0x80) {
@@ -61,6 +67,12 @@
               buffer8[i++] = 0x80 | (code & 0x3f);
             }
           }
+        }
+      } else {
+        if (array) {
+          for (i = start;index < length && i < 64; ++index) {
+            blocks[i >> 2] |= message[index] << SHIFT[i++ & 3];
+          }
         } else {
           for (i = start;index < length && i < 64; ++index) {
             code = message.charCodeAt(index);
@@ -82,6 +94,7 @@
             }
           }
         }
+      }
       bytes += i - start;
       start = i - 64;
       if(index == length) {

tests/test.js

@@ -43,5 +43,29 @@
         expect(md4('012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678012345678')).to.be('47eebbaaa1fca842a7bff2d3b7c9f0c6');
       });
     });
+
+    describe('array input', function() {
+      var HELLO = [72, 69, 76, 76, 79];
+      describe('standard array', function() {
+        it('should be successful', function() {
+          expect(md4(HELLO)).to.be('4c832b90373e2d3f4a8ce06172989e2b');
+        });
+      });
+      if (!global.JS_MD4_TEST) {
+        describe('typed array', function() {
+          var copy = function(source, target) {
+            for (var i = 0; i < source.length; i++) {
+              target[i] = source[i];
+            }
+            return target;
+          }
+          it('should be successful', function() {
+            expect(md4(copy(HELLO, new Uint8Array(HELLO.length)))).to.be('4c832b90373e2d3f4a8ce06172989e2b');
+            expect(md4(copy(HELLO, new Int8Array(HELLO.length)))).to.be('4c832b90373e2d3f4a8ce06172989e2b');
           });
+        });
+      }
+    });
+  });
+
 })(md4);