@bitgo/secp256k1
Version:
Low-level cryptographic methods used in BitGo packages for the secp256k1 curve
172 lines • 23.3 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.musig = exports.bip32 = exports.ECPair = exports.ecc = void 0;
const createHmac = require("create-hmac");
const ecpair_1 = require("ecpair");
const necc = require("@noble/secp256k1");
const bip32_1 = require("bip32");
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore base_crypto is exported as a subPath export, ignoring since compiler complains about importing like this
const baseCrypto = require("@brandonblack/musig/base_crypto");
const musig_1 = require("@brandonblack/musig");
const createHash = require('create-hash');
necc.utils.sha256Sync = (...messages) => {
const sha256 = createHash('sha256');
for (const message of messages)
sha256.update(message);
return sha256.digest();
};
necc.utils.hmacSha256Sync = (key, ...messages) => {
const hash = createHmac('sha256', Buffer.from(key));
messages.forEach((m) => hash.update(m));
return Uint8Array.from(hash.digest());
};
const defaultTrue = (param) => param !== false;
function throwToNull(fn) {
try {
return fn();
}
catch (e) {
return null;
}
}
function isPoint(p, xOnly) {
if ((p.length === 32) !== xOnly)
return false;
try {
return !!necc.Point.fromHex(p);
}
catch (e) {
return false;
}
}
function toBigInt(b) {
const buff = Buffer.from(b);
if (buff.length !== 32) {
throw new Error('Invalid size ${buff.length}');
}
return BigInt(`0x${buff.toString('hex')}`);
}
const ecc = {
isPoint: (p) => isPoint(p, false),
isPrivate: (d) => necc.utils.isValidPrivateKey(d),
isXOnlyPoint: (p) => isPoint(p, true),
xOnlyPointAddTweak: (p, tweak) => throwToNull(() => {
const P = necc.utils.pointAddScalar(p, tweak, true);
const parity = P[0] % 2 === 1 ? 1 : 0;
return { parity, xOnlyPubkey: P.slice(1) };
}),
pointFromScalar: (sk, compressed) => throwToNull(() => necc.getPublicKey(sk, defaultTrue(compressed))),
pointCompress: (p, compressed) => {
return necc.Point.fromHex(p).toRawBytes(defaultTrue(compressed));
},
pointMultiply: (a, tweak, compressed) => throwToNull(() => necc.utils.pointMultiply(a, tweak, defaultTrue(compressed))),
pointAdd: (a, b, compressed) => throwToNull(() => {
const A = necc.Point.fromHex(a);
const B = necc.Point.fromHex(b);
return A.add(B).toRawBytes(defaultTrue(compressed));
}),
pointAddScalar: (p, tweak, compressed) => throwToNull(() => necc.utils.pointAddScalar(p, tweak, defaultTrue(compressed))),
privateAdd: (d, tweak) => throwToNull(() => {
const res = necc.utils.privateAdd(d, tweak);
// tiny-secp256k1 returns null rather than allowing a 0 private key to be returned
// ECPair.testEcc() requires that behavior.
if (res?.every((i) => i === 0))
return null;
return res;
}),
privateNegate: (d) => necc.utils.privateNegate(d),
sign: (h, d, e) => {
return necc.signSync(h, d, { der: false, extraEntropy: e });
},
signSchnorr: (h, d, e = Buffer.alloc(32, 0x00)) => {
return necc.schnorr.signSync(h, d, e);
},
verify: (h, Q, signature, strict) => {
return necc.verify(signature, h, Q, { strict });
},
verifySchnorr: (h, Q, signature) => {
return necc.schnorr.verifySync(signature, h, Q);
},
};
exports.ecc = ecc;
const crypto = {
...baseCrypto,
pointMultiplyUnsafe(p, a, compress) {
try {
const product = necc.Point.fromHex(p).multiplyAndAddUnsafe(necc.Point.ZERO, toBigInt(a), BigInt(1));
if (!product)
return null;
return product.toRawBytes(compress);
}
catch {
return null;
}
},
pointMultiplyAndAddUnsafe(p1, a, p2, compress) {
try {
const p2p = necc.Point.fromHex(p2);
const p = necc.Point.fromHex(p1).multiplyAndAddUnsafe(p2p, toBigInt(a), BigInt(1));
if (!p)
return null;
return p.toRawBytes(compress);
}
catch {
return null;
}
},
pointAdd(a, b, compress) {
try {
return necc.Point.fromHex(a).add(necc.Point.fromHex(b)).toRawBytes(compress);
}
catch {
return null;
}
},
pointAddTweak(p, tweak, compress) {
try {
const P = necc.Point.fromHex(p);
const t = baseCrypto.readSecret(tweak);
const Q = necc.Point.BASE.multiplyAndAddUnsafe(P, t, BigInt(1));
if (!Q)
throw new Error('Tweaked point at infinity');
return Q.toRawBytes(compress);
}
catch {
return null;
}
},
pointCompress(p, compress = true) {
return necc.Point.fromHex(p).toRawBytes(compress);
},
liftX(p) {
try {
return necc.Point.fromHex(p).toRawBytes(false);
}
catch {
return null;
}
},
getPublicKey(s, compress) {
try {
return necc.getPublicKey(s, compress);
}
catch {
return null;
}
},
taggedHash: necc.utils.taggedHashSync,
sha256(...messages) {
const sha256 = createHash('sha256');
for (const message of messages)
sha256.update(message);
return sha256.digest();
},
};
const ECPair = (0, ecpair_1.ECPairFactory)(ecc);
exports.ECPair = ECPair;
const bip32 = (0, bip32_1.BIP32Factory)(ecc);
exports.bip32 = bip32;
const musig = (0, musig_1.MuSigFactory)(crypto);
exports.musig = musig;
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* as createHmac from 'create-hmac';\nimport { ECPairAPI, ECPairFactory, ECPairInterface } from 'ecpair';\nimport * as necc from '@noble/secp256k1';\nimport { BIP32API, BIP32Factory, BIP32Interface } from 'bip32';\n// eslint-disable-next-line @typescript-eslint/ban-ts-comment\n// @ts-ignore base_crypto is exported as a subPath export, ignoring since compiler complains about importing like this\nimport * as baseCrypto from '@brandonblack/musig/base_crypto';\nimport { MuSig, MuSigFactory } from '@brandonblack/musig';\n\nconst createHash = require('create-hash');\n\nnecc.utils.sha256Sync = (...messages: Uint8Array[]): Uint8Array => {\n  const sha256 = createHash('sha256');\n  for (const message of messages) sha256.update(message);\n  return sha256.digest();\n};\n\nnecc.utils.hmacSha256Sync = (key: Uint8Array, ...messages: Uint8Array[]): Uint8Array => {\n  const hash = createHmac('sha256', Buffer.from(key));\n  messages.forEach((m) => hash.update(m));\n  return Uint8Array.from(hash.digest());\n};\n\nconst defaultTrue = (param?: boolean): boolean => param !== false;\n\nfunction throwToNull<Type>(fn: () => Type): Type | null {\n  try {\n    return fn();\n  } catch (e) {\n    return null;\n  }\n}\n\nfunction isPoint(p: Uint8Array, xOnly: boolean): boolean {\n  if ((p.length === 32) !== xOnly) return false;\n  try {\n    return !!necc.Point.fromHex(p);\n  } catch (e) {\n    return false;\n  }\n}\n\nfunction toBigInt(b: Uint8Array | Buffer): bigint {\n  const buff = Buffer.from(b);\n  if (buff.length !== 32) {\n    throw new Error('Invalid size ${buff.length}');\n  }\n  return BigInt(`0x${buff.toString('hex')}`);\n}\n\nconst ecc = {\n  isPoint: (p: Uint8Array): boolean => isPoint(p, false),\n  isPrivate: (d: Uint8Array): boolean => necc.utils.isValidPrivateKey(d),\n  isXOnlyPoint: (p: Uint8Array): boolean => isPoint(p, true),\n\n  xOnlyPointAddTweak: (p: Uint8Array, tweak: Uint8Array): { parity: 0 | 1; xOnlyPubkey: Uint8Array } | null =>\n    throwToNull(() => {\n      const P = necc.utils.pointAddScalar(p, tweak, true);\n      const parity = P[0] % 2 === 1 ? 1 : 0;\n      return { parity, xOnlyPubkey: P.slice(1) };\n    }),\n\n  pointFromScalar: (sk: Uint8Array, compressed?: boolean): Uint8Array | null =>\n    throwToNull(() => necc.getPublicKey(sk, defaultTrue(compressed))),\n\n  pointCompress: (p: Uint8Array, compressed?: boolean): Uint8Array => {\n    return necc.Point.fromHex(p).toRawBytes(defaultTrue(compressed));\n  },\n\n  pointMultiply: (a: Uint8Array, tweak: Uint8Array, compressed?: boolean): Uint8Array | null =>\n    throwToNull(() => necc.utils.pointMultiply(a, tweak, defaultTrue(compressed))),\n\n  pointAdd: (a: Uint8Array, b: Uint8Array, compressed?: boolean): Uint8Array | null =>\n    throwToNull(() => {\n      const A = necc.Point.fromHex(a);\n      const B = necc.Point.fromHex(b);\n      return A.add(B).toRawBytes(defaultTrue(compressed));\n    }),\n\n  pointAddScalar: (p: Uint8Array, tweak: Uint8Array, compressed?: boolean): Uint8Array | null =>\n    throwToNull(() => necc.utils.pointAddScalar(p, tweak, defaultTrue(compressed))),\n\n  privateAdd: (d: Uint8Array, tweak: Uint8Array): Uint8Array | null =>\n    throwToNull(() => {\n      const res = necc.utils.privateAdd(d, tweak);\n      // tiny-secp256k1 returns null rather than allowing a 0 private key to be returned\n      // ECPair.testEcc() requires that behavior.\n      if (res?.every((i) => i === 0)) return null;\n      return res;\n    }),\n\n  privateNegate: (d: Uint8Array): Uint8Array => necc.utils.privateNegate(d),\n\n  sign: (h: Uint8Array, d: Uint8Array, e?: Uint8Array): Uint8Array => {\n    return necc.signSync(h, d, { der: false, extraEntropy: e });\n  },\n\n  signSchnorr: (h: Uint8Array, d: Uint8Array, e: Uint8Array = Buffer.alloc(32, 0x00)): Uint8Array => {\n    return necc.schnorr.signSync(h, d, e);\n  },\n\n  verify: (h: Uint8Array, Q: Uint8Array, signature: Uint8Array, strict?: boolean): boolean => {\n    return necc.verify(signature, h, Q, { strict });\n  },\n\n  verifySchnorr: (h: Uint8Array, Q: Uint8Array, signature: Uint8Array): boolean => {\n    return necc.schnorr.verifySync(signature, h, Q);\n  },\n};\n\nconst crypto = {\n  ...baseCrypto,\n  pointMultiplyUnsafe(p: Uint8Array, a: Uint8Array, compress: boolean): Uint8Array | null {\n    try {\n      const product = necc.Point.fromHex(p).multiplyAndAddUnsafe(necc.Point.ZERO, toBigInt(a), BigInt(1));\n      if (!product) return null;\n      return product.toRawBytes(compress);\n    } catch {\n      return null;\n    }\n  },\n  pointMultiplyAndAddUnsafe(p1: Uint8Array, a: Uint8Array, p2: Uint8Array, compress: boolean): Uint8Array | null {\n    try {\n      const p2p = necc.Point.fromHex(p2);\n      const p = necc.Point.fromHex(p1).multiplyAndAddUnsafe(p2p, toBigInt(a), BigInt(1));\n      if (!p) return null;\n      return p.toRawBytes(compress);\n    } catch {\n      return null;\n    }\n  },\n  pointAdd(a: Uint8Array, b: Uint8Array, compress: boolean): Uint8Array | null {\n    try {\n      return necc.Point.fromHex(a).add(necc.Point.fromHex(b)).toRawBytes(compress);\n    } catch {\n      return null;\n    }\n  },\n  pointAddTweak(p: Uint8Array, tweak: Uint8Array, compress: boolean): Uint8Array | null {\n    try {\n      const P = necc.Point.fromHex(p);\n      const t = baseCrypto.readSecret(tweak);\n      const Q = necc.Point.BASE.multiplyAndAddUnsafe(P, t, BigInt(1));\n      if (!Q) throw new Error('Tweaked point at infinity');\n      return Q.toRawBytes(compress);\n    } catch {\n      return null;\n    }\n  },\n  pointCompress(p: Uint8Array, compress = true): Uint8Array {\n    return necc.Point.fromHex(p).toRawBytes(compress);\n  },\n  liftX(p: Uint8Array): Uint8Array | null {\n    try {\n      return necc.Point.fromHex(p).toRawBytes(false);\n    } catch {\n      return null;\n    }\n  },\n  getPublicKey(s: Uint8Array, compress: boolean): Uint8Array | null {\n    try {\n      return necc.getPublicKey(s, compress);\n    } catch {\n      return null;\n    }\n  },\n  taggedHash: necc.utils.taggedHashSync,\n  sha256(...messages: Uint8Array[]): Uint8Array {\n    const sha256 = createHash('sha256');\n    for (const message of messages) sha256.update(message);\n    return sha256.digest();\n  },\n};\n\nconst ECPair: ECPairAPI = ECPairFactory(ecc);\nconst bip32: BIP32API = BIP32Factory(ecc);\nconst musig: MuSig = MuSigFactory(crypto);\n\nexport { ecc, ECPair, ECPairAPI, ECPairInterface, bip32, BIP32API, BIP32Interface, musig, MuSig };\n"]}