Module
Fastest JS implementation of ed25519, x25519 & ristretto255. Independently audited, high-security, 0-dependency EDDSA signatures and ECDH key agreement
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const hex = ed.utils.bytesToHex;
const PRIVATE_KEY = toBytes('a665a45920422f9d417e4867ef');// const MESSAGE = ripemd160(new Uint8Array([97, 98, 99, 100, 101, 102, 103]));// prettier-ignoreconst MESSAGE = new Uint8Array([ 135, 79, 153, 96, 197, 210, 183, 169, 181, 250, 211, 131, 225, 186, 68, 113, 158, 187, 116, 58]);// const WRONG_MESSAGE = ripemd160(new Uint8Array([98, 99, 100, 101, 102, 103]));// prettier-ignoreconst WRONG_MESSAGE = new Uint8Array([ 88, 157, 140, 127, 29, 160, 162, 75, 192, 123, 115, 129, 173, 72, 177, 207, 194, 17, 175, 28]);
function toBytes(numOrStr: string | bigint | number): Uint8Array { let hex = typeof numOrStr === 'string' ? numOrStr : numOrStr.toString(16); hex = hex.padStart(64, '0'); const array = new Uint8Array(hex.length / 2); for (let i = 0; i < array.length; i++) { let j = i * 2; array[i] = Number.parseInt(hex.slice(j, j + 2), 16); } return array;}
describe('ed25519', () => { beforeAll(() => { ed.utils.precompute(8); }); it('should not accept >32byte private keys', async () => { const invalidPriv = 100000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800073278156000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000n; expect(() => ed.getPublicKey(invalidPriv)).rejects.toThrowError(); }); it('should verify just signed message', async () => { await fc.assert( fc.asyncProperty( fc.hexaString(1, 32), fc.bigInt(2n, ed.CURVE.n), async (message: string, privateKey: bigint) => { const publicKey = await ed.getPublicKey(toBytes(privateKey)); const signature = await ed.sign(toBytes(message), toBytes(privateKey)); expect(publicKey.length).toBe(32); expect(signature.length).toBe(64); expect(await ed.verify(signature, toBytes(message), publicKey)).toBe(true); } ), { numRuns: 5 } ); }); it('should not verify sign with wrong message', async () => { await fc.assert( fc.asyncProperty( fc.array(fc.integer(0x00, 0xff)), fc.array(fc.integer(0x00, 0xff)), fc.bigInt(1n, ed.CURVE.n), async (bytes, wrongBytes, privateKey) => { const message = new Uint8Array(bytes); const wrongMessage = new Uint8Array(wrongBytes); const publicKey = await ed.getPublicKey(privateKey); const signature = await ed.sign(message, toBytes(privateKey)); expect(await ed.verify(signature, wrongMessage, publicKey)).toBe( bytes.toString() === wrongBytes.toString() ); } ), { numRuns: 5 } ); }); describe('verify()', () => { it('should sign and verify', async () => { const publicKey = await ed.getPublicKey(PRIVATE_KEY); const signature = await ed.sign(MESSAGE, PRIVATE_KEY); expect(await ed.verify(signature, MESSAGE, publicKey)).toBe(true); }); it('should not verify signature with wrong public key', async () => { const publicKey = await ed.getPublicKey(12); const signature = await ed.sign(MESSAGE, PRIVATE_KEY); expect(await ed.verify(signature, MESSAGE, publicKey)).toBe(false); }); it('should not verify signature with wrong hash', async () => { const publicKey = await ed.getPublicKey(PRIVATE_KEY); const signature = await ed.sign(MESSAGE, PRIVATE_KEY); expect(await ed.verify(signature, WRONG_MESSAGE, publicKey)).toBe(false); }); }); describe('BASE_POINT.multiply()', () => { // https://xmr.llcoins.net/addresstests.html it('should create right publicKey without SHA-512 hashing TEST 1', () => { const publicKey = ed.Point.BASE.multiply(0x90af56259a4b6bfbc4337980d5d75fbe3c074630368ff3804d33028e5dbfa77n); expect(publicKey.toHex()).toBe( '0f3b913371411b27e646b537e888f685bf929ea7aab93c950ed84433f064480d' ); }); it('should create right publicKey without SHA-512 hashing TEST 2', () => { const publicKey = ed.Point.BASE.multiply(0x364e8711a60780382a5d57b061c126f039940f28a9e91fe039d4d3094d8b88n); expect(publicKey.toHex()).toBe( 'ad545340b58610f0cd62f17d55af1ab11ecde9c084d5476865ddb4dbda015349' ); }); it('should create right publicKey without SHA-512 hashing TEST 3', () => { const publicKey = ed.Point.BASE.multiply(0xb9bf90ff3abec042752cac3a07a62f0c16cfb9d32a3fc2305d676ec2d86e941n); expect(publicKey.toHex()).toBe( 'e097c4415fe85724d522b2e449e8fd78dd40d20097bdc9ae36fe8ec6fe12cb8c' ); }); it('should create right publicKey without SHA-512 hashing TEST 4', () => { const publicKey = ed.Point.BASE.multiply(0x69d896f02d79524c9878e080308180e2859d07f9f54454e0800e8db0847a46en); expect(publicKey.toHex()).toBe( 'f12cb7c43b59971395926f278ce7c2eaded9444fbce62ca717564cb508a0db1d' ); }); it('should throw Point#multiply on TEST 5', () => { for (const num of [0n, 0, -1n, -1, 1.1]) { expect(() => ed.Point.BASE.multiply(num)).toThrowError(); } }); });
describe('getSharedSecret()', () => { it('should convert base point to montgomery using toX25519()', () => { expect(hex(ed.Point.BASE.toX25519())).toBe(ed.curve25519.BASE_POINT_U); });
it('should be commutative', async () => { for (let i = 0; i < 512; i++) { const asec = ed.utils.randomPrivateKey(); const apub = await ed.getPublicKey(asec); const bsec = ed.utils.randomPrivateKey(); const bpub = await ed.getPublicKey(bsec); try { expect(ed.getSharedSecret(asec, bpub)).toEqual(ed.getSharedSecret(bsec, apub)); } catch (error) { console.error('not commutative', { asec, apub, bsec, bpub }); throw error; } } }); });});
// https://ed25519.cr.yp.to/python/sign.py// https://ed25519.cr.yp.to/python/sign.inputdescribe('ed25519 official vectors', () => { const data = readFileSync(join(__dirname, 'vectors.txt'), 'utf-8'); const vectors = data .trim() .split('\n') .map((line) => line.split(':'));
it('should match 1024 official vectors', async () => { for (let i = 0; i < vectors.length; i++) { const vector = vectors[i]; // Extract. const priv = vector[0].slice(0, 64); const expectedPub = vector[1]; const msg = vector[2]; const expectedSignature = vector[3].slice(0, 128);
// Calculate const pub = await ed.getPublicKey(toBytes(priv)); expect(hex(pub)).toEqual(expectedPub); expect(pub).toEqual(ed.Point.fromHex(pub).toRawBytes());
const signature = hex(await ed.sign(msg, priv)); // console.log('vector', i); // expect(pub).toBe(expectedPub); expect(signature).toBe(expectedSignature); } });});
// https://tools.ietf.org/html/rfc8032#section-7describe('rfc8032 vectors', () => { it('should create right signature for 0x9d and empty string', async () => { const privateKey = '9d61b19deffd5a60ba844af492ec2cc44449c5697b326919703bac031cae7f60'; const publicKey = await ed.getPublicKey(privateKey); const message = ''; const signature = await ed.sign(message, privateKey); expect(hex(publicKey)).toBe('d75a980182b10ab7d54bfed3c964073a0ee172f3daa62325af021a68f707511a'); expect(hex(signature)).toBe( 'e5564300c360ac729086e2cc806e828a84877f1eb8e5d974d873e065224901555fb8821590a33bacc61e39701cf9b46bd25bf5f0595bbe24655141438e7a100b' ); }); it('should create right signature for 0x4c and 72', async () => { const privateKey = '4ccd089b28ff96da9db6c346ec114e0f5b8a319f35aba624da8cf6ed4fb8a6fb'; const publicKey = await ed.getPublicKey(privateKey); const message = '72'; const signature = await ed.sign(message, privateKey); expect(hex(publicKey)).toBe('3d4017c3e843895a92b70aa74d1b7ebc9c982ccf2ec4968cc0cd55f12af4660c'); expect(hex(signature)).toBe( '92a009a9f0d4cab8720e820b5f642540a2b27b5416503f8fb3762223ebdb69da085ac1e43e15996e458f3613d0f11d8c387b2eaeb4302aeeb00d291612bb0c00' ); }); it('should create right signature for 0x00 and 5a', async () => { const privateKey = '002fdd1f7641793ab064bb7aa848f762e7ec6e332ffc26eeacda141ae33b1783'; const publicKey = await ed.getPublicKey(privateKey); const message = '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'; const signature = await ed.sign(message, privateKey); expect(hex(publicKey)).toBe('77d1d8ebacd13f4e2f8a40e28c4a63bc9ce3bfb69716334bcb28a33eb134086c'); expect(hex(signature)).toBe( '0df3aa0d0999ad3dc580378f52d152700d5b3b057f56a66f92112e441e1cb9123c66f18712c87efe22d2573777296241216904d7cdd7d5ea433928bd2872fa0c' ); }); it('should create right signature for 0xf5 and long msg', async () => { const privateKey = 'f5e5767cf153319517630f226876b86c8160cc583bc013744c6bf255f5cc0ee5'; const publicKey = await ed.getPublicKey(privateKey); const message = '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'; const signature = await ed.sign(message, privateKey); expect(hex(publicKey)).toBe('278117fc144c72340f67d0f2316e8386ceffbf2b2428c9c51fef7c597f1d426e'); expect(hex(signature)).toBe( '0aab4c900501b3e24d7cdf4663326a3a87df5e4843b2cbdb67cbf6e460fec350aa5371b1508f9f4528ecea23c436d94b5e8fcd4f681e30a6ac00a9704a188a03' ); });});
describe('ristretto255', () => { const { ExtendedPoint } = ed; async function sha512(message: Uint8Array) { const hash = createHash('sha512'); hash.update(message); return Uint8Array.from(hash.digest()); }
function arrayToHex(bytes: Uint8Array) { return Array.from(bytes) .map((a) => a.toString(16).padStart(2, '0')) .join(''); }
function hexToArray(hash: string) { hash = hash.length & 1 ? `0${hash}` : hash; const len = hash.length; const result = new Uint8Array(len / 2); for (let i = 0, j = 0; i < len - 1; i += 2, j++) { result[j] = parseInt(hash[i] + hash[i + 1], 16); } return result; }
const PRIVATE_KEY = 0xa665a45920422f9d417e4867efn; // const MESSAGE = ripemd160(new Uint8Array([97, 98, 99, 100, 101, 102, 103])); // prettier-ignore const MESSAGE = new Uint8Array([ 135, 79, 153, 96, 197, 210, 183, 169, 181, 250, 211, 131, 225, 186, 68, 113, 158, 187, 116, 58, ]); // const WRONG_MESSAGE = ripemd160(new Uint8Array([98, 99, 100, 101, 102, 103])); // prettier-ignore const WRONG_MESSAGE = new Uint8Array([ 88, 157, 140, 127, 29, 160, 162, 75, 192, 123, 115, 129, 173, 72, 177, 207, 194, 17, 175, 28, ]); // it("should verify just signed message", async () => { // await fc.assert(fc.asyncProperty( // fc.hexa(), // fc.bigInt(2n, ristretto25519.PRIME_ORDER), // async (message, privateKey) => { // const publicKey = await ristretto25519.getPublicKey(privateKey); // const signature = await ristretto25519.sign(message, privateKey); // expect(publicKey.length).toBe(32); // expect(signature.length).toBe(64); // expect(await ristretto25519.verify(signature, message, publicKey)).toBe(true); // }), // { numRuns: 1 } // ); // }); // it("should not verify sign with wrong message", async () => { // await fc.assert(fc.asyncProperty( // fc.array(fc.integer(0x00, 0xff)), // fc.array(fc.integer(0x00, 0xff)), // fc.bigInt(2n, ristretto25519.PRIME_ORDER), // async (bytes, wrongBytes, privateKey) => { // const message = new Uint8Array(bytes); // const wrongMessage = new Uint8Array(wrongBytes); // const publicKey = await ristretto25519.getPublicKey(privateKey); // const signature = await ristretto25519.sign(message, privateKey); // expect(await ristretto25519.verify(signature, wrongMessage, publicKey)).toBe( // bytes.toString() === wrongBytes.toString() // ); // }), // { numRuns: 1 } // ); // }); // it("should sign and verify", async () => { // const publicKey = await ristretto25519.getPublicKey(PRIVATE_KEY); // const signature = await ristretto25519.sign(MESSAGE, PRIVATE_KEY); // expect(await ristretto25519.verify(signature, MESSAGE, publicKey)).toBe(true); // }); // it("should not verify signature with wrong public key", async () => { // const publicKey = await ristretto25519.getPublicKey(12); // const signature = await ristretto25519.sign(MESSAGE, PRIVATE_KEY); // expect(await ristretto25519.verify(signature, MESSAGE, publicKey)).toBe(false); // }); // it("should not verify signature with wrong hash", async () => { // const publicKey = await ristretto25519.getPublicKey(PRIVATE_KEY); // const signature = await ristretto25519.sign(MESSAGE, PRIVATE_KEY); // expect(await ristretto25519.verify(signature, WRONG_MESSAGE, publicKey)).toBe(false); // }); it('should follow the byte encodings of small multiples', () => { const encodingsOfSmallMultiples = [ // This is the identity point '0000000000000000000000000000000000000000000000000000000000000000', // This is the basepoint 'e2f2ae0a6abc4e71a884a961c500515f58e30b6aa582dd8db6a65945e08d2d76', // These are small multiples of the basepoint '6a493210f7499cd17fecb510ae0cea23a110e8d5b901f8acadd3095c73a3b919', '94741f5d5d52755ece4f23f044ee27d5d1ea1e2bd196b462166b16152a9d0259', 'da80862773358b466ffadfe0b3293ab3d9fd53c5ea6c955358f568322daf6a57', 'e882b131016b52c1d3337080187cf768423efccbb517bb495ab812c4160ff44e', 'f64746d3c92b13050ed8d80236a7f0007c3b3f962f5ba793d19a601ebb1df403', '44f53520926ec81fbd5a387845beb7df85a96a24ece18738bdcfa6a7822a176d', '903293d8f2287ebe10e2374dc1a53e0bc887e592699f02d077d5263cdd55601c', '02622ace8f7303a31cafc63f8fc48fdc16e1c8c8d234b2f0d6685282a9076031', '20706fd788b2720a1ed2a5dad4952b01f413bcf0e7564de8cdc816689e2db95f', 'bce83f8ba5dd2fa572864c24ba1810f9522bc6004afe95877ac73241cafdab42', 'e4549ee16b9aa03099ca208c67adafcafa4c3f3e4e5303de6026e3ca8ff84460', 'aa52e000df2e16f55fb1032fc33bc42742dad6bd5a8fc0be0167436c5948501f', '46376b80f409b29dc2b5f6f0c52591990896e5716f41477cd30085ab7f10301e', 'e0c418f7c8d9c4cdd7395b93ea124f3ad99021bb681dfc3302a9d99a2e53e64e', ]; let B = ExtendedPoint.BASE; let P = ExtendedPoint.ZERO; for (const encoded of encodingsOfSmallMultiples) { expect(arrayToHex(P.toRistrettoBytes())).toBe(encoded); expect( arrayToHex(ExtendedPoint.fromRistrettoBytes(hexToArray(encoded)).toRistrettoBytes()) ).toBe(encoded); P = P.add(B); } }); it('should not convert bad bytes encoding', () => { const badEncodings = [ // These are all bad because they're non-canonical field encodings. '00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f', 'f3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f', 'edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f', // These are all bad because they're negative field elements. '0100000000000000000000000000000000000000000000000000000000000000', '01ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f', 'ed57ffd8c914fb201471d1c3d245ce3c746fcbe63a3679d51b6a516ebebe0e20', 'c34c4e1826e5d403b78e246e88aa051c36ccf0aafebffe137d148a2bf9104562', 'c940e5a4404157cfb1628b108db051a8d439e1a421394ec4ebccb9ec92a8ac78', '47cfc5497c53dc8e61c91d17fd626ffb1c49e2bca94eed052281b510b1117a24', 'f1c6165d33367351b0da8f6e4511010c68174a03b6581212c71c0e1d026c3c72', '87260f7a2f12495118360f02c26a470f450dadf34a413d21042b43b9d93e1309', // These are all bad because they give a nonsquare x^2. '26948d35ca62e643e26a83177332e6b6afeb9d08e4268b650f1f5bbd8d81d371', '4eac077a713c57b4f4397629a4145982c661f48044dd3f96427d40b147d9742f', 'de6a7b00deadc788eb6b6c8d20c0ae96c2f2019078fa604fee5b87d6e989ad7b', 'bcab477be20861e01e4a0e295284146a510150d9817763caf1a6f4b422d67042', '2a292df7e32cababbd9de088d1d1abec9fc0440f637ed2fba145094dc14bea08', 'f4a9e534fc0d216c44b218fa0c42d99635a0127ee2e53c712f70609649fdff22', '8268436f8c4126196cf64b3c7ddbda90746a378625f9813dd9b8457077256731', '2810e5cbc2cc4d4eece54f61c6f69758e289aa7ab440b3cbeaa21995c2f4232b', // These are all bad because they give a negative xy value. '3eb858e78f5a7254d8c9731174a94f76755fd3941c0ac93735c07ba14579630e', 'a45fdc55c76448c049a1ab33f17023edfb2be3581e9c7aade8a6125215e04220', 'd483fe813c6ba647ebbfd3ec41adca1c6130c2beeee9d9bf065c8d151c5f396e', '8a2e1d30050198c65a54483123960ccc38aef6848e1ec8f5f780e8523769ba32', '32888462f8b486c68ad7dd9610be5192bbeaf3b443951ac1a8118419d9fa097b', '227142501b9d4355ccba290404bde41575b037693cef1f438c47f8fbf35d1165', '5c37cc491da847cfeb9281d407efc41e15144c876e0170b499a96a22ed31e01e', '445425117cb8c90edcbc7c1cc0e74f747f2c1efa5630a967c64f287792a48a4b', // This is s = -1, which causes y = 0. 'ecffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f', ]; for (const badBytes of badEncodings) { expect(() => ExtendedPoint.fromRistrettoBytes(hexToArray(badBytes))).toThrow(); } }); it('should create right points from hash', async () => { const labels = [ 'Ristretto is traditionally a short shot of espresso coffee', 'made with the normal amount of ground coffee but extracted with', 'about half the amount of water in the same amount of time', 'by using a finer grind.', 'This produces a concentrated shot of coffee per volume.', 'Just pulling a normal shot short will produce a weaker shot', 'and is not a Ristretto as some believe.', ]; const encodedHashToPoints = [ '3066f82a1a747d45120d1740f14358531a8f04bbffe6a819f86dfe50f44a0a46', 'f26e5b6f7d362d2d2a94c5d0e7602cb4773c95a2e5c31a64f133189fa76ed61b', '006ccd2a9e6867e6a2c5cea83d3302cc9de128dd2a9a57dd8ee7b9d7ffe02826', 'f8f0c87cf237953c5890aec3998169005dae3eca1fbb04548c635953c817f92a', 'ae81e7dedf20a497e10c304a765c1767a42d6e06029758d2d7e8ef7cc4c41179', 'e2705652ff9f5e44d3e841bf1c251cf7dddb77d140870d1ab2ed64f1a9ce8628', '80bd07262511cdde4863f8a7434cef696750681cb9510eea557088f76d9e5065', ];
for (let i = 0; i < labels.length; i++) { const hash = await sha512(utf8ToBytes(labels[i])); const point = ExtendedPoint.fromRistrettoHash(hash); expect(arrayToHex(point.toRistrettoBytes())).toBe(encodedHashToPoints[i]); } });});
const hexes = Array.from({ length: 256 }, (v, i) => i.toString(16).padStart(2, '0'));function bytesToHex(uint8a: Uint8Array): string { // pre-caching improves the speed 6x let hex = ''; for (let i = 0; i < uint8a.length; i++) { hex += hexes[uint8a[i]]; } return hex;}
function hexToBytes(hex: string): Uint8Array { if (typeof hex !== 'string') { throw new TypeError('hexToBytes: expected string, got ' + typeof hex); } if (hex.length % 2) throw new Error('hexToBytes: received invalid unpadded hex'); const array = new Uint8Array(hex.length / 2); for (let i = 0; i < array.length; i++) { const j = i * 2; const hexByte = hex.slice(j, j + 2); const byte = Number.parseInt(hexByte, 16); if (Number.isNaN(byte)) throw new Error('Invalid byte sequence'); array[i] = byte; } return array;}
declare const TextEncoder: any;declare const TextDecoder: any;
export function utf8ToBytes(str: string): Uint8Array { if (typeof str !== 'string') { throw new TypeError(`utf8ToBytes expected string, got ${typeof str}`); } return new TextEncoder().encode(str);}
describe('curve25519', () => { it('scalarMult 1', () => { const X25519_VECTORS = [ { k: 'a546e36bf0527c9d3b16154b82465edd62144c0ac1fc5a18506a2244ba449ac4', u: 'e6db6867583030db3594c1a424b15f7c726624ec26b3353b10a903a6d0ab1c4c', ku: 'c3da55379de9c6908e94ea4df28d084f32eccf03491c71f754b4075577a28552', }, { k: '4b66e9d4d1b4673c5ad22691957d6af5c11b6421e0ea01d42ca4169e7918ba0d', u: 'e5210f12786811d3f4b7959d0538ae2c31dbe7106fc03c3efc4cd549c715a493', ku: '95cbde9476e8907d7aade45cb4b873f88b595a68799fa152e6f8f7647aac7957', }, ]; for (const { k, u, ku } of X25519_VECTORS) { const _k = Uint8Array.from(hexToBytes(k)); const _u = Uint8Array.from(hexToBytes(u)); expect(bytesToHex(ed.curve25519.scalarMult(_k, _u))).toBe(ku); } }); it('scalarMultBase recursive', () => { // https://datatracker.ietf.org/doc/html/rfc7748#section-5.2 const VECTORS = [ { iters: 1, res: '422c8e7a6227d7bca1350b3e2bb7279f7897b87bb6854b783c60e80311ae3079' }, { iters: 1000, res: '684cf59ba83309552800ef566f2f4d3c1c3887c49360e3875f2eb94d99532c51' }, // {iters: 1000000, res: '7c3911e0ab2586fd864497297e575e6f3bc601c0883c30df5f4dd2d24f665424'}, ]; for (const { iters, res } of VECTORS) { let k = hexToBytes('0900000000000000000000000000000000000000000000000000000000000000'); let u = k; for (let i = 0; i < iters; i++) { if (i > 0 && i % 100000 === 0) console.log('10k'); [k, u] = [ed.curve25519.scalarMult(k, u), k]; } expect(bytesToHex(k)).toBe(res); } }); it('scalarMult 2', () => { const a_priv = hexToBytes('77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a'); const a_pub = hexToBytes('8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a'); const b_priv = hexToBytes('5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb'); const b_pub = hexToBytes('de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f'); const k = '4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742';
expect(bytesToHex(ed.curve25519.scalarMultBase(a_priv))).toBe(bytesToHex(a_pub)); expect(bytesToHex(ed.curve25519.scalarMultBase(b_priv))).toBe(bytesToHex(b_pub)); expect(bytesToHex(ed.curve25519.scalarMult(a_priv, b_pub))).toBe(k); expect(bytesToHex(ed.curve25519.scalarMult(b_priv, a_pub))).toBe(k); });});
describe('input immutability', () => { it('sign/verify are immutable', async () => { const privateKey = ed.utils.randomPrivateKey(); const publicKey = await ed.getPublicKey(privateKey);
for (let i = 0; i < 100; i++) { let payload = ed.utils.randomBytes(100); let signature = await ed.sign(payload, privateKey); if (!(await ed.verify(signature, payload, publicKey))) { throw new Error('Signature verification failed'); } const signatureCopy = Buffer.alloc(signature.byteLength); signatureCopy.set(signature, 0); // <-- breaks payload = payload.slice(); signature = signature.slice();
if (!(await ed.verify(signatureCopy, payload, publicKey))) { throw new Error('Copied signature verification failed'); } } });});