ipfs storage for images and other nontext items. for use with etica - runs on etica network and currencys
https://collect.etica-stats.org
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42 lines
1.7 KiB
42 lines
1.7 KiB
/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */ |
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import { createCurve } from './_shortw_utils.js'; |
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import { sha256 } from '@noble/hashes/sha256'; |
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import { Field } from './abstract/modular.js'; |
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import { mapToCurveSimpleSWU } from './abstract/weierstrass.js'; |
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import { createHasher } from './abstract/hash-to-curve.js'; |
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// NIST secp256r1 aka p256 |
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// https://www.secg.org/sec2-v2.pdf, https://neuromancer.sk/std/nist/P-256 |
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const Fp = Field(BigInt('0xffffffff00000001000000000000000000000000ffffffffffffffffffffffff')); |
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const CURVE_A = Fp.create(BigInt('-3')); |
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const CURVE_B = BigInt('0x5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b'); |
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// prettier-ignore |
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export const p256 = createCurve({ |
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a: CURVE_A, |
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b: CURVE_B, |
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Fp, |
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// Curve order, total count of valid points in the field |
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n: BigInt('0xffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551'), |
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// Base (generator) point (x, y) |
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Gx: BigInt('0x6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296'), |
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Gy: BigInt('0x4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5'), |
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h: BigInt(1), |
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lowS: false, |
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}, sha256); |
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export const secp256r1 = p256; |
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const mapSWU = /* @__PURE__ */ (() => mapToCurveSimpleSWU(Fp, { |
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A: CURVE_A, |
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B: CURVE_B, |
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Z: Fp.create(BigInt('-10')), |
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}))(); |
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const htf = /* @__PURE__ */ (() => createHasher(secp256r1.ProjectivePoint, (scalars) => mapSWU(scalars[0]), { |
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DST: 'P256_XMD:SHA-256_SSWU_RO_', |
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encodeDST: 'P256_XMD:SHA-256_SSWU_NU_', |
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p: Fp.ORDER, |
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m: 1, |
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k: 128, |
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expand: 'xmd', |
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hash: sha256, |
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}))(); |
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export const hashToCurve = /* @__PURE__ */ (() => htf.hashToCurve)(); |
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export const encodeToCurve = /* @__PURE__ */ (() => htf.encodeToCurve)(); |
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//# sourceMappingURL=p256.js.map
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