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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.
*/
/**
* Some utilities for testing Elliptic curve crypto.
*
*/
goog.provide('wycheproof.EcUtil');
goog.require('wycheproof.BigInteger');
goog.require('wycheproof.BigPrimeInteger');
var BigInteger = wycheproof.BigInteger;
var BigPrimeInteger = wycheproof.BigPrimeInteger;
/**
* Parameters of a NIST-recommended curve.
* @param {!number} keySize The bit length of the order n
* @param {!string} hexP The prime modulus p in hex format
* @param {!string} hexN The order n in hex format
* @param {!string} hexB The coefficient b in hex format
* @param {!string} hexGX The x-coordinate of the public curve point
* @param {!string} hexGY The y-coordinate of the public curve point
*/
var NistCurveSpec = function(keySize, hexP, hexN, hexB, hexGX, hexGY) {
this.keySize = keySize;
this.p = new BigPrimeInteger(BigInteger.fromHex(hexP).toByteArray());
this.n = new BigPrimeInteger(BigInteger.fromHex(hexN).toByteArray());
this.b = BigInteger.fromHex(hexB);
this.gx = BigInteger.fromHex(hexGX);
this.gy = BigInteger.fromHex(hexGY);
};
/**
* Returns the NIST's recommended parameters of the given curve.
* @param {!string} name The curve name
*
* @return {NistCurveSpec}
*/
wycheproof.EcUtil.getCurveSpec = function(name) {
switch (name) {
case 'P-256':
return wycheproof.EcUtil.getNistP256Params();
case 'P-384':
return wycheproof.EcUtil.getNistP384Params();
case 'P-521':
return wycheproof.EcUtil.getNistP521Params();
default:
throw 'Curve not implemented:' + name;
}
};
/**
* Returns the NIST's recommended parameters of the secp256r1 curve.
*
* @return {NistCurveSpec}
*/
wycheproof.EcUtil.getNistP256Params = function() {
return new NistCurveSpec(
256,
'ffffffff00000001000000000000000000000000ffffffffffffffffffffffff',
'ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551',
'5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b',
'6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296',
'4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5');
};
/**
* Returns the NIST's recommended parameters of the secp384r1 curve.
*
* @return {NistCurveSpec}
*/
wycheproof.EcUtil.getNistP384Params = function() {
return new NistCurveSpec(
384,
'fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'
+ 'ffeffffffff0000000000000000ffffffff',
'ffffffffffffffffffffffffffffffffffffffffffffffffc7634d81f4372'
+ 'ddf581a0db248b0a77aecec196accc52973',
'b3312fa7e23ee7e4988e056be3f82d19181d9c6efe8141120314088f5013875a'
+ 'c656398d8a2ed19d2a85c8edd3ec2aef',
'aa87ca22be8b05378eb1c71ef320ad746e1d3b628ba79b9859f741e082542a38'
+ '5502f25dbf55296c3a545e3872760ab7',
'3617de4a96262c6f5d9e98bf9292dc29f8f41dbd289a147ce9da3113b5f0b8c0'
+ '0a60b1ce1d7e819d7a431d7c90ea0e5f');
};
/**
* Returns the NIST's recommended parameters of the secp521r1 curve.
*
* @return {NistCurveSpec}
*/
wycheproof.EcUtil.getNistP521Params = function() {
return new NistCurveSpec(
521,
'1fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'
+ 'fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
'1fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff'
+ 'a51868783bf2f966b7fcc0148f709a5d03bb5c9b8899c47aebb6fb71e91386409',
'051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef10'
+ '9e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00',
'c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3d'
+ 'baa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66',
'11839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e6'
+ '62c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650');
};
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