56 lines
2.7 KiB
JavaScript
56 lines
2.7 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.encodeToCurve = exports.hashToCurve = exports.secp521r1 = exports.p521 = void 0;
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/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
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const sha512_1 = require("@noble/hashes/sha512");
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const _shortw_utils_js_1 = require("./_shortw_utils.js");
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const hash_to_curve_js_1 = require("./abstract/hash-to-curve.js");
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const modular_js_1 = require("./abstract/modular.js");
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const weierstrass_js_1 = require("./abstract/weierstrass.js");
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// NIST secp521r1 aka p521
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// Note that it's 521, which differs from 512 of its hash function.
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// https://www.secg.org/sec2-v2.pdf, https://neuromancer.sk/std/nist/P-521
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// Field over which we'll do calculations.
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// prettier-ignore
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const P = BigInt('0x1ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff');
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const Fp = (0, modular_js_1.Field)(P);
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const CURVE = {
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a: Fp.create(BigInt('-3')),
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b: BigInt('0x0051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef109e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00'),
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Fp,
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n: BigInt('0x01fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffa51868783bf2f966b7fcc0148f709a5d03bb5c9b8899c47aebb6fb71e91386409'),
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Gx: BigInt('0x00c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66'),
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Gy: BigInt('0x011839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650'),
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h: BigInt(1),
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};
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// prettier-ignore
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exports.p521 = (0, _shortw_utils_js_1.createCurve)({
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a: CURVE.a, // Equation params: a, b
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b: CURVE.b,
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Fp, // Field: 2n**521n - 1n
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// Curve order, total count of valid points in the field
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n: CURVE.n,
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Gx: CURVE.Gx, // Base point (x, y) aka generator point
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Gy: CURVE.Gy,
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h: CURVE.h,
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lowS: false,
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allowedPrivateKeyLengths: [130, 131, 132] // P521 keys are variable-length. Normalize to 132b
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}, sha512_1.sha512);
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exports.secp521r1 = exports.p521;
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const mapSWU = /* @__PURE__ */ (() => (0, weierstrass_js_1.mapToCurveSimpleSWU)(Fp, {
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A: CURVE.a,
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B: CURVE.b,
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Z: Fp.create(BigInt('-4')),
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}))();
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const htf = /* @__PURE__ */ (() => (0, hash_to_curve_js_1.createHasher)(exports.secp521r1.ProjectivePoint, (scalars) => mapSWU(scalars[0]), {
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DST: 'P521_XMD:SHA-512_SSWU_RO_',
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encodeDST: 'P521_XMD:SHA-512_SSWU_NU_',
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p: Fp.ORDER,
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m: 1,
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k: 256,
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expand: 'xmd',
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hash: sha512_1.sha512,
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}))();
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exports.hashToCurve = (() => htf.hashToCurve)();
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exports.encodeToCurve = (() => htf.encodeToCurve)();
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//# sourceMappingURL=p521.js.map
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