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master/closure-library/closure/goog/crypt/hash.js

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+// Copyright 2011 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Abstract cryptographic hash interface.
+ *
+ * See goog.crypt.Sha1 and goog.crypt.Md5 for sample implementations.
+ *
+ */
+
+goog.provide('goog.crypt.Hash');
+
+
+
+/**
+ * Create a cryptographic hash instance.
+ *
+ * @constructor
+ */
+goog.crypt.Hash = function() {};
+
+
+/**
+ * Resets the internal accumulator.
+ */
+goog.crypt.Hash.prototype.reset = goog.abstractMethod;
+
+
+/**
+ * Adds a byte array (array with values in [0-255] range) or a string (might
+ * only contain 8-bit, i.e., Latin1 characters) to the internal accumulator.
+ *
+ * @param {Array.<number>|Uint8Array|string} bytes Data used for the update.
+ * @param {number=} opt_length Number of bytes to use.
+ */
+goog.crypt.Hash.prototype.update = goog.abstractMethod;
+
+
+/**
+ * @return {Array.<number>} The finalized hash computed
+ *     from the internal accumulator.
+ */
+goog.crypt.Hash.prototype.digest = goog.abstractMethod;