PHP WebShell
Текущая директория: /opt/BitGoJS/modules/sdk-lib-mpc/dist/src/shamir
Просмотр файла: shamir.js
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Shamir = void 0;
const crypto_1 = __importDefault(require("crypto"));
const util_1 = require("../util");
class Shamir {
constructor(curve) {
this.curve = curve;
}
/**
* Perform Shamir sharing on the secret `secret` to the degree `threshold - 1` split `numShares`
* ways. The split secret requires `threshold` shares to be reconstructed.
*
* @param secret secret to split
* @param threshold share threshold required to reconstruct secret
* @param numShares total number of shares to split secret into
* @param indices optional indices which can be used while generating the shares
* @param salt optional salt which could be used while generating the shares
* @returns Dictionary containing `shares`, a dictionary where each key is an int
* in the range 1<=x<=numShares representing that share's free term, and `v`, an
* array of proofs to be shared with all participants.
*/
split(secret, threshold, numShares, indices, salt = BigInt(0)) {
let bigIndices;
if (indices) {
bigIndices = indices.map((i) => {
if (i < 1) {
throw new Error('Invalid value supplied for indices');
}
return BigInt(i);
});
}
else {
// make range(1, n + 1)
bigIndices = Array(numShares)
.fill(null)
.map((_, i) => BigInt(i + 1));
}
if (threshold < 2) {
throw new Error('Threshold cannot be less than two');
}
if (threshold > numShares) {
throw new Error('Threshold cannot be greater than the total number of shares');
}
const coefs = [];
const v = [];
for (let ind = 0; ind < threshold - 1; ind++) {
const coeff = (0, util_1.clamp)((0, util_1.bigIntFromBufferLE)(crypto_1.default.createHmac('sha256', ind.toString(10)).update((0, util_1.bigIntToBufferLE)(secret, 32)).digest()));
coefs.push(coeff);
v.unshift(this.curve.basePointMult(coeff));
}
coefs.push(secret);
const shares = {};
for (let ind = 0; ind < bigIndices.length; ind++) {
const x = bigIndices[ind];
let partial = coefs[0];
for (let other = 1; other < coefs.length; other++) {
partial = this.curve.scalarAdd(coefs[other], this.curve.scalarMult(partial, x));
}
shares[parseInt(x.toString(), 10)] = partial;
}
return { shares, v };
}
/**
* Verify a VSS share.
*
* @param u Secret share received from other party.
* @param v Verification values received from other party.
* @param index Verifier's index.
* @returns True on success; otherwise throws Error.
*/
verify(u, v, index) {
if (v.length < 2) {
throw new Error('Threshold cannot be less than two');
}
if (index < 1) {
throw new Error('Invalid value supplied for index');
}
const i = BigInt(index);
let x = v[0];
let t = BigInt(1);
for (const vsj of v.slice(1)) {
t = this.curve.scalarMult(t, i);
const vjt = this.curve.pointMultiply(vsj, t);
x = this.curve.pointAdd(x, vjt);
}
const sigmaG = this.curve.basePointMult(u);
if (x !== sigmaG) {
throw new Error('Could not verify share');
}
return true;
}
/**
* Reconstitute a secret from a dictionary of shares. The number of shares must
* be equal to `t` to reconstitute the original secret.
*
* @param shares dictionary of shares. each key is the free term of the share
* @returns secret
*/
combine(shares) {
try {
let s = BigInt(0);
for (const i in shares) {
const yi = shares[i];
const xi = BigInt(i);
let num = BigInt(1);
let denum = BigInt(1);
for (const j in shares) {
const xj = BigInt(j);
if (xi !== xj) {
num = this.curve.scalarMult(num, xj);
}
}
for (const j in shares) {
const xj = BigInt(j);
if (xi !== xj) {
denum = this.curve.scalarMult(denum, this.curve.scalarSub(xj, xi));
}
}
const inverted = this.curve.scalarInvert(denum);
const innerMultiplied = this.curve.scalarMult(num, inverted);
const multiplied = this.curve.scalarMult(innerMultiplied, yi);
s = this.curve.scalarAdd(multiplied, s);
}
return s;
}
catch (error) {
throw new Error('Failed to combine Shamir shares , ' + error);
}
}
}
exports.Shamir = Shamir;
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"shamir.js","sourceRoot":"","sources":["../../../src/shamir/shamir.ts"],"names":[],"mappings":";;;;;;AAAA,oDAA4B;AAG5B,kCAAsE;AAEtE,MAAa,MAAM;IAGjB,YAAY,KAAgB;QAC1B,IAAI,CAAC,KAAK,GAAG,KAAK,CAAC;IACrB,CAAC;IAED;;;;;;;;;;;;OAYG;IACH,KAAK,CAAC,MAAc,EAAE,SAAiB,EAAE,SAAiB,EAAE,OAAuB,EAAE,IAAI,GAAG,MAAM,CAAC,CAAC,CAAC;QACnG,IAAI,UAAyB,CAAC;QAC9B,IAAI,OAAO,EAAE,CAAC;YACZ,UAAU,GAAG,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE;gBAC7B,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC;oBACV,MAAM,IAAI,KAAK,CAAC,oCAAoC,CAAC,CAAC;gBACxD,CAAC;gBACD,OAAO,MAAM,CAAC,CAAC,CAAC,CAAC;YACnB,CAAC,CAAC,CAAC;QACL,CAAC;aAAM,CAAC;YACN,uBAAuB;YACvB,UAAU,GAAG,KAAK,CAAC,SAAS,CAAC;iBAC1B,IAAI,CAAC,IAAI,CAAC;iBACV,GAAG,CAAC,CAAC,CAAC,EAAE,CAAC,EAAE,EAAE,CAAC,MAAM,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;QAClC,CAAC;QACD,IAAI,SAAS,GAAG,CAAC,EAAE,CAAC;YAClB,MAAM,IAAI,KAAK,CAAC,mCAAmC,CAAC,CAAC;QACvD,CAAC;QAED,IAAI,SAAS,GAAG,SAAS,EAAE,CAAC;YAC1B,MAAM,IAAI,KAAK,CAAC,6DAA6D,CAAC,CAAC;QACjF,CAAC;QAED,MAAM,KAAK,GAAa,EAAE,CAAC;QAC3B,MAAM,CAAC,GAAkB,EAAE,CAAC;QAC5B,KAAK,IAAI,GAAG,GAAG,CAAC,EAAE,GAAG,GAAG,SAAS,GAAG,CAAC,EAAE,GAAG,EAAE,EAAE,CAAC;YAC7C,MAAM,KAAK,GAAG,IAAA,YAAK,EACjB,IAAA,yBAAkB,EAAC,gBAAM,CAAC,UAAU,CAAC,QAAQ,EAAE,GAAG,CAAC,QAAQ,CAAC,EAAE,CAAC,CAAC,CAAC,MAAM,CAAC,IAAA,uBAAgB,EAAC,MAAM,EAAE,EAAE,CAAC,CAAC,CAAC,MAAM,EAAE,CAAC,CAChH,CAAC;YACF,KAAK,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC;YAClB,CAAC,CAAC,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,aAAa,CAAC,KAAK,CAAC,CAAC,CAAC;QAC7C,CAAC;QACD,KAAK,CAAC,IAAI,CAAC,MAAM,CAAC,CAAC;QAEnB,MAAM,MAAM,GAA2B,EAAE,CAAC;QAC1C,KAAK,IAAI,GAAG,GAAG,CAAC,EAAE,GAAG,GAAG,UAAU,CAAC,MAAM,EAAE,GAAG,EAAE,EAAE,CAAC;YACjD,MAAM,CAAC,GAAG,UAAU,CAAC,GAAG,CAAC,CAAC;YAC1B,IAAI,OAAO,GAAG,KAAK,CAAC,CAAC,CAAC,CAAC;YACvB,KAAK,IAAI,KAAK,GAAG,CAAC,EAAE,KAAK,GAAG,KAAK,CAAC,MAAM,EAAE,KAAK,EAAE,EAAE,CAAC;gBAClD,OAAO,GAAG,IAAI,CAAC,KAAK,CAAC,SAAS,CAAC,KAAK,CAAC,KAAK,CAAC,EAAE,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,OAAO,EAAE,CAAC,CAAC,CAAC,CAAC;YAClF,CAAC;YACD,MAAM,CAAC,QAAQ,CAAC,CAAC,CAAC,QAAQ,EAAE,EAAE,EAAE,CAAC,CAAC,GAAG,OAAO,CAAC;QAC/C,CAAC;QACD,OAAO,EAAE,MAAM,EAAE,CAAC,EAAE,CAAC;IACvB,CAAC;IAED;;;;;;;OAOG;IACH,MAAM,CAAC,CAAS,EAAE,CAAgB,EAAE,KAAa;QAC/C,IAAI,CAAC,CAAC,MAAM,GAAG,CAAC,EAAE,CAAC;YACjB,MAAM,IAAI,KAAK,CAAC,mCAAmC,CAAC,CAAC;QACvD,CAAC;QACD,IAAI,KAAK,GAAG,CAAC,EAAE,CAAC;YACd,MAAM,IAAI,KAAK,CAAC,kCAAkC,CAAC,CAAC;QACtD,CAAC;QACD,MAAM,CAAC,GAAG,MAAM,CAAC,KAAK,CAAC,CAAC;QACxB,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC,CAAC;QACb,IAAI,CAAC,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;QAClB,KAAK,MAAM,GAAG,IAAI,CAAC,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,CAAC;YAC7B,CAAC,GAAG,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC;YAChC,MAAM,GAAG,GAAG,IAAI,CAAC,KAAK,CAAC,aAAa,CAAC,GAAG,EAAE,CAAC,CAAC,CAAC;YAC7C,CAAC,GAAG,IAAI,CAAC,KAAK,CAAC,QAAQ,CAAC,CAAC,EAAE,GAAG,CAAC,CAAC;QAClC,CAAC;QACD,MAAM,MAAM,GAAG,IAAI,CAAC,KAAK,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC;QAC3C,IAAI,CAAC,KAAK,MAAM,EAAE,CAAC;YACjB,MAAM,IAAI,KAAK,CAAC,wBAAwB,CAAC,CAAC;QAC5C,CAAC;QACD,OAAO,IAAI,CAAC;IACd,CAAC;IAED;;;;;;OAMG;IACH,OAAO,CAAC,MAA8B;QACpC,IAAI,CAAC;YACH,IAAI,CAAC,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;YAClB,KAAK,MAAM,CAAC,IAAI,MAAM,EAAE,CAAC;gBACvB,MAAM,EAAE,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;gBACrB,MAAM,EAAE,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;gBACrB,IAAI,GAAG,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;gBACpB,IAAI,KAAK,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;gBAEtB,KAAK,MAAM,CAAC,IAAI,MAAM,EAAE,CAAC;oBACvB,MAAM,EAAE,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;oBACrB,IAAI,EAAE,KAAK,EAAE,EAAE,CAAC;wBACd,GAAG,GAAG,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,GAAG,EAAE,EAAE,CAAC,CAAC;oBACvC,CAAC;gBACH,CAAC;gBACD,KAAK,MAAM,CAAC,IAAI,MAAM,EAAE,CAAC;oBACvB,MAAM,EAAE,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC;oBACrB,IAAI,EAAE,KAAK,EAAE,EAAE,CAAC;wBACd,KAAK,GAAG,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,KAAK,EAAE,IAAI,CAAC,KAAK,CAAC,SAAS,CAAC,EAAE,EAAE,EAAE,CAAC,CAAC,CAAC;oBACrE,CAAC;gBACH,CAAC;gBACD,MAAM,QAAQ,GAAG,IAAI,CAAC,KAAK,CAAC,YAAY,CAAC,KAAK,CAAC,CAAC;gBAChD,MAAM,eAAe,GAAG,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,GAAG,EAAE,QAAQ,CAAC,CAAC;gBAC7D,MAAM,UAAU,GAAG,IAAI,CAAC,KAAK,CAAC,UAAU,CAAC,eAAe,EAAE,EAAE,CAAC,CAAC;gBAC9D,CAAC,GAAG,IAAI,CAAC,KAAK,CAAC,SAAS,CAAC,UAAU,EAAE,CAAC,CAAC,CAAC;YAC1C,CAAC;YACD,OAAO,CAAC,CAAC;QACX,CAAC;QAAC,OAAO,KAAK,EAAE,CAAC;YACf,MAAM,IAAI,KAAK,CAAC,oCAAoC,GAAG,KAAK,CAAC,CAAC;QAChE,CAAC;IACH,CAAC;CACF;AAtID,wBAsIC","sourcesContent":["import crypto from 'crypto';\nimport { BaseCurve } from '../curves';\nimport { SplitSecret } from './types';\nimport { bigIntFromBufferLE, bigIntToBufferLE, clamp } from '../util';\n\nexport class Shamir {\n  curve: BaseCurve;\n\n  constructor(curve: BaseCurve) {\n    this.curve = curve;\n  }\n\n  /**\n   * Perform Shamir sharing on the secret `secret` to the degree `threshold - 1` split `numShares`\n   * ways. The split secret requires `threshold` shares to be reconstructed.\n   *\n   * @param secret secret to split\n   * @param threshold share threshold required to reconstruct secret\n   * @param numShares total number of shares to split secret into\n   * @param indices optional indices which can be used while generating the shares\n   * @param salt optional salt which could be used while generating the shares\n   * @returns Dictionary containing `shares`, a dictionary where each key is an int\n   * in the range 1<=x<=numShares representing that share's free term, and `v`, an\n   * array of proofs to be shared with all participants.\n   */\n  split(secret: bigint, threshold: number, numShares: number, indices?: Array<number>, salt = BigInt(0)): SplitSecret {\n    let bigIndices: Array<bigint>;\n    if (indices) {\n      bigIndices = indices.map((i) => {\n        if (i < 1) {\n          throw new Error('Invalid value supplied for indices');\n        }\n        return BigInt(i);\n      });\n    } else {\n      // make range(1, n + 1)\n      bigIndices = Array(numShares)\n        .fill(null)\n        .map((_, i) => BigInt(i + 1));\n    }\n    if (threshold < 2) {\n      throw new Error('Threshold cannot be less than two');\n    }\n\n    if (threshold > numShares) {\n      throw new Error('Threshold cannot be greater than the total number of shares');\n    }\n\n    const coefs: bigint[] = [];\n    const v: Array<bigint> = [];\n    for (let ind = 0; ind < threshold - 1; ind++) {\n      const coeff = clamp(\n        bigIntFromBufferLE(crypto.createHmac('sha256', ind.toString(10)).update(bigIntToBufferLE(secret, 32)).digest())\n      );\n      coefs.push(coeff);\n      v.unshift(this.curve.basePointMult(coeff));\n    }\n    coefs.push(secret);\n\n    const shares: Record<number, bigint> = {};\n    for (let ind = 0; ind < bigIndices.length; ind++) {\n      const x = bigIndices[ind];\n      let partial = coefs[0];\n      for (let other = 1; other < coefs.length; other++) {\n        partial = this.curve.scalarAdd(coefs[other], this.curve.scalarMult(partial, x));\n      }\n      shares[parseInt(x.toString(), 10)] = partial;\n    }\n    return { shares, v };\n  }\n\n  /**\n   * Verify a VSS share.\n   *\n   * @param u Secret share received from other party.\n   * @param v Verification values received from other party.\n   * @param index Verifier's index.\n   * @returns True on success; otherwise throws Error.\n   */\n  verify(u: bigint, v: Array<bigint>, index: number): boolean {\n    if (v.length < 2) {\n      throw new Error('Threshold cannot be less than two');\n    }\n    if (index < 1) {\n      throw new Error('Invalid value supplied for index');\n    }\n    const i = BigInt(index);\n    let x = v[0];\n    let t = BigInt(1);\n    for (const vsj of v.slice(1)) {\n      t = this.curve.scalarMult(t, i);\n      const vjt = this.curve.pointMultiply(vsj, t);\n      x = this.curve.pointAdd(x, vjt);\n    }\n    const sigmaG = this.curve.basePointMult(u);\n    if (x !== sigmaG) {\n      throw new Error('Could not verify share');\n    }\n    return true;\n  }\n\n  /**\n   * Reconstitute a secret from a dictionary of shares. The number of shares must\n   * be equal to `t` to reconstitute the original secret.\n   *\n   * @param shares dictionary of shares. each key is the free term of the share\n   * @returns secret\n   */\n  combine(shares: Record<number, bigint>): bigint {\n    try {\n      let s = BigInt(0);\n      for (const i in shares) {\n        const yi = shares[i];\n        const xi = BigInt(i);\n        let num = BigInt(1);\n        let denum = BigInt(1);\n\n        for (const j in shares) {\n          const xj = BigInt(j);\n          if (xi !== xj) {\n            num = this.curve.scalarMult(num, xj);\n          }\n        }\n        for (const j in shares) {\n          const xj = BigInt(j);\n          if (xi !== xj) {\n            denum = this.curve.scalarMult(denum, this.curve.scalarSub(xj, xi));\n          }\n        }\n        const inverted = this.curve.scalarInvert(denum);\n        const innerMultiplied = this.curve.scalarMult(num, inverted);\n        const multiplied = this.curve.scalarMult(innerMultiplied, yi);\n        s = this.curve.scalarAdd(multiplied, s);\n      }\n      return s;\n    } catch (error) {\n      throw new Error('Failed to combine Shamir shares , ' + error);\n    }\n  }\n}\n"]}Выполнить команду
Для локальной разработки. Не используйте в интернете!