forked from tornado-packages/noble-curves
77 lines
2.8 KiB
Markdown
77 lines
2.8 KiB
Markdown
# noble-curves
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Minimal, zero-dependency JS implementation of elliptic curve cryptography.
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Implements Short Weierstrass curves with ECDSA signature scheme.
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To keep the package minimal, no curve definitions are provided out-of-box. Use `micro-curve-definitions` module:
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- It provides P192, P224, P256, P384, P521, secp256k1, stark curve, bn254, pasta (pallas/vesta) short weierstrass curves
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- It also provides ed25519 and ed448 twisted edwards curves
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- Main reason for separate package is the fact hashing library (like `@noble/hashes`) is required for full functionality
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- We may reconsider merging packages in future, when a stable version would be ready
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Future plans:
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- Edwards and Montgomery curves
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- hash-to-curve standard
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- point indistinguishability
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- pairings
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### This library belongs to _noble_ crypto
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> **noble-crypto** — high-security, easily auditable set of contained cryptographic libraries and tools.
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- No dependencies, small files
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- Easily auditable TypeScript/JS code
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- Supported in all major browsers and stable node.js versions
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- All releases are signed with PGP keys
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- Check out [homepage](https://paulmillr.com/noble/) & all libraries:
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[secp256k1](https://github.com/paulmillr/noble-secp256k1),
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[ed25519](https://github.com/paulmillr/noble-ed25519),
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[bls12-381](https://github.com/paulmillr/noble-bls12-381),
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[hashes](https://github.com/paulmillr/noble-hashes),
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[curves](https://github.com/paulmillr/noble-curves)
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## Usage
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Use NPM in node.js / browser, or include single file from
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[GitHub's releases page](https://github.com/paulmillr/noble-curves/releases):
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## Usage
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```sh
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npm install @noble/curves
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```
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```ts
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import shortw from '@noble/curves/shortw'; // Short Weierstrass curve
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import twistede from '@noble/curves/twistede'; // Twisted Edwards curve
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import { sha256 } from '@noble/hashes/sha256';
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import { hmac } from '@noble/hashes/hmac';
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import { concatBytes, randomBytes } from '@noble/hashes/utils';
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export const secp256k1 = shortw({
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a: 0n,
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b: 7n,
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// Field over which we'll do calculations
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P: 2n ** 256n - 2n ** 32n - 2n ** 9n - 2n ** 8n - 2n ** 7n - 2n ** 6n - 2n ** 4n - 1n,
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// Curve order, total count of valid points in the field
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n: 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141n,
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// Base point (x, y) aka generator point
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Gx: 55066263022277343669578718895168534326250603453777594175500187360389116729240n,
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Gy: 32670510020758816978083085130507043184471273380659243275938904335757337482424n,
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hash: sha256,
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hmac: (k: Uint8Array, ...msgs: Uint8Array[]) => hmac(sha256, key, concatBytes(...msgs)),
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randomBytes: randomBytes
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});
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// secp256k1.getPublicKey(priv)
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// secp256k1.sign(msg, priv)
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// secp256k1.verify(sig, msg, pub)
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```
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## License
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MIT (c) Paul Miller [(https://paulmillr.com)](https://paulmillr.com), see LICENSE file.
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