Project import generated by Copybara.

PiperOrigin-RevId: 191113399 GitOrigin-RevId: cfebd59d1f086e907f468004c7d033199d116fad
2018-03-30 17:03:22 -04:00
parent 72412ae03c
commit 31387e2cd5
95 changed files with 131371 additions and 22 deletions
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+/**
+ * @license
+ * Copyright 2017 Google Inc. 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 Defines interfaces for big numbers.
+ * All arithmetic operations are inherits from e2e.BigNum.
+ */
+goog.provide('wycheproof.BigInteger');
+goog.provide('wycheproof.BigPrimeInteger');
+goog.require('e2e.BigNum');
+goog.require('e2e.BigPrimeNum');
+goog.require('goog.crypt');
+goog.require('goog.crypt.base64');
+goog.require('goog.testing.asserts');
+goog.require('wycheproof.TestUtil');
+
+var TestUtil = wycheproof.TestUtil;
+
+
+/**
+ * Non-negative arbitrary-precision integers.
+ * @param {(!Array<Byte>|!Uint8Array)=} optValue
+ *     The value of the BigInteger in big endian.
+ * @constructor
+ * @extends {e2e.BigNum}
+ */
+wycheproof.BigInteger = function(optValue) {
+   wycheproof.BigInteger.base(this, 'constructor', optValue);
+};
+goog.inherits(wycheproof.BigInteger, e2e.BigNum);
+
+
+/**
+ * A factory method to create a BigInteger from a string that is
+ * in big-endian, two's complement and hex representation.
+ * @param {!string} s The string representation of the BigInteger
+ *
+ * @return {!BigInteger}
+ */
+wycheproof.BigInteger.fromHex = function(s) {
+  assertTrue('Input is not a hex string', TestUtil.isHex(s));
+  if (s.length % 2 == 1) {
+    s = '0' + s;
+  }
+  var bytes = goog.crypt.hexToByteArray(s);
+  var bigInt = new wycheproof.BigInteger(bytes);
+  return bigInt.dropLeadingZeros();
+};
+
+/**
+ * Converts this to a big-endian Base64URL string.
+ * @param {!number} optValue An optional value that specifies the length in
+ * bytes of the result. If it is bigger than the original length of this number,
+ * zeros are added to its beginning.
+ *
+ * @return {!string}
+ */
+wycheproof.BigInteger.prototype.toBase64Url = function(optValue) {
+  var bytes = this.toByteArray();
+  if (goog.isDef(optValue) && optValue > bytes.length) {
+    var addingZeros = new Array(optValue-bytes.length).fill(0);
+    bytes = addingZeros.concat(bytes);
+  }
+  var b64Str = goog.crypt.base64.encodeByteArray(bytes);
+  return TestUtil.base64ToBase64Url(b64Str);
+};
+
+
+/**
+ * Converts this to an ArrayBuffer of big-endian bytes
+ * @param {!number} optValue An optional value that specifies the length in
+ * bytes of the result. If it is bigger than the original length of this number,
+ * zeros are added to its beginning.
+ *
+ * @return {!ArrayBuffer}
+ */
+wycheproof.BigInteger.prototype.toArrayBuffer = function(optValue) {
+  var bytes = this.toByteArray();
+  if (goog.isDef(optValue) && optValue > bytes.length) {
+    var addingZeros = new Array(optValue-bytes.length).fill(0);
+    bytes = addingZeros.concat(bytes);
+  }
+  return new Uint8Array(bytes).buffer;
+};
+
+
+/**
+ * Odd prime big integer that could be use as the modulus in modular arithmetic
+ * operations in crypto schemes such as ECDSA or ECDH.
+ * @param {!Array<Byte>|!Uint8Array} modulus The modulus to use.
+ * @constructor
+ * @extends {e2e.BigPrimeNum}
+ */
+wycheproof.BigPrimeInteger = function(modulus) {
+   wycheproof.BigPrimeInteger.base(this, 'constructor', modulus);
+};
+goog.inherits(wycheproof.BigPrimeInteger, e2e.BigPrimeNum);
+
+