首次放到 git

utils/hmac.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var hash = require('hash.js');
+
+var sha2 = require('./sha2.js');
+
+var convert = require('./convert.js');
+
+// @TODO: Make this use create-hmac in node
+
+function createSha256Hmac(key) {
+    if (!key.buffer) { key = convert.arrayify(key); }
+    return new hash.hmac(sha2.createSha256, key);
+}
+
+function createSha512Hmac(key) {
+    if (!key.buffer) { key = convert.arrayify(key); }
+    return new hash.hmac(sha2.createSha512, key);
+}
+
+module.exports = {
+    createSha256Hmac: createSha256Hmac,
+    createSha512Hmac: createSha512Hmac,
+};