45 lines
2.1 KiB
JavaScript
45 lines
2.1 KiB
JavaScript
|
"use strict";
|
||
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
||
|
|
exports.encodeToCurve = exports.hashToCurve = exports.secp256r1 = exports.p256 = void 0;
|
||
|
|
/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
|
||
|
|
const sha256_1 = require("@noble/hashes/sha256");
|
||
|
|
const _shortw_utils_js_1 = require("./_shortw_utils.js");
|
||
|
|
const hash_to_curve_js_1 = require("./abstract/hash-to-curve.js");
|
||
|
|
const modular_js_1 = require("./abstract/modular.js");
|
||
|
|
const weierstrass_js_1 = require("./abstract/weierstrass.js");
|
||
|
|
// NIST secp256r1 aka p256
|
||
|
|
// https://www.secg.org/sec2-v2.pdf, https://neuromancer.sk/std/nist/P-256
|
||
|
|
const Fp = (0, modular_js_1.Field)(BigInt('0xffffffff00000001000000000000000000000000ffffffffffffffffffffffff'));
|
||
|
|
const CURVE_A = Fp.create(BigInt('-3'));
|
||
|
|
const CURVE_B = BigInt('0x5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b');
|
||
|
|
// prettier-ignore
|
||
|
|
exports.p256 = (0, _shortw_utils_js_1.createCurve)({
|
||
|
|
a: CURVE_A, // Equation params: a, b
|
||
|
|
b: CURVE_B,
|
||
|
|
Fp, // Field: 2n**224n * (2n**32n-1n) + 2n**192n + 2n**96n-1n
|
||
|
|
// Curve order, total count of valid points in the field
|
||
|
|
n: BigInt('0xffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551'),
|
||
|
|
// Base (generator) point (x, y)
|
||
|
|
Gx: BigInt('0x6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296'),
|
||
|
|
Gy: BigInt('0x4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5'),
|
||
|
|
h: BigInt(1),
|
||
|
|
lowS: false,
|
||
|
|
}, sha256_1.sha256);
|
||
|
|
exports.secp256r1 = exports.p256;
|
||
|
|
const mapSWU = /* @__PURE__ */ (() => (0, weierstrass_js_1.mapToCurveSimpleSWU)(Fp, {
|
||
|
|
A: CURVE_A,
|
||
|
|
B: CURVE_B,
|
||
|
|
Z: Fp.create(BigInt('-10')),
|
||
|
|
}))();
|
||
|
|
const htf = /* @__PURE__ */ (() => (0, hash_to_curve_js_1.createHasher)(exports.secp256r1.ProjectivePoint, (scalars) => mapSWU(scalars[0]), {
|
||
|
|
DST: 'P256_XMD:SHA-256_SSWU_RO_',
|
||
|
|
encodeDST: 'P256_XMD:SHA-256_SSWU_NU_',
|
||
|
|
p: Fp.ORDER,
|
||
|
|
m: 1,
|
||
|
|
k: 128,
|
||
|
|
expand: 'xmd',
|
||
|
|
hash: sha256_1.sha256,
|
||
|
|
}))();
|
||
|
|
exports.hashToCurve = (() => htf.hashToCurve)();
|
||
|
|
exports.encodeToCurve = (() => htf.encodeToCurve)();
|
||
|
|
//# sourceMappingURL=p256.js.map
|