156 lines
4.4 KiB
TypeScript
156 lines
4.4 KiB
TypeScript
import {Keypair} from "./keypair";
|
|
import {PrivateKey} from "./privateKey";
|
|
import {PublicKey} from "./publicKey";
|
|
import {Signature} from "./signature";
|
|
import {PUBLIC_KEY_LENGTH} from "./constants";
|
|
import {assert} from "./helpers";
|
|
|
|
export {Keypair, PrivateKey, PublicKey, Signature};
|
|
|
|
export {init as initBLS} from "./context";
|
|
|
|
function toBuffer(input: Uint8Array): Buffer {
|
|
return Buffer.from(input.buffer, input.byteOffset, input.length);
|
|
}
|
|
|
|
/**
|
|
* Generates new secret and public key
|
|
*/
|
|
export function generateKeyPair(): Keypair {
|
|
return Keypair.generate();
|
|
}
|
|
|
|
/**
|
|
* Generates public key from given secret.
|
|
* @param {BLSSecretKey} secretKey
|
|
*/
|
|
export function generatePublicKey(secretKey: Uint8Array): Buffer {
|
|
assert(secretKey, "secretKey is null or undefined");
|
|
const keypair = new Keypair(PrivateKey.fromBytes(toBuffer(secretKey)));
|
|
return keypair.publicKey.toBytesCompressed();
|
|
}
|
|
|
|
/**
|
|
* Signs given message using secret key.
|
|
* @param secretKey
|
|
* @param messageHash
|
|
*/
|
|
export function sign(secretKey: Uint8Array, messageHash: Uint8Array): Buffer {
|
|
assert(secretKey, "secretKey is null or undefined");
|
|
assert(messageHash, "messageHash is null or undefined");
|
|
const privateKey = PrivateKey.fromBytes(toBuffer(secretKey));
|
|
return privateKey.signMessage(toBuffer(messageHash)).toBytesCompressed();
|
|
}
|
|
|
|
/**
|
|
* Compines all given signature into one.
|
|
* @param signatures
|
|
*/
|
|
export function aggregateSignatures(signatures: Uint8Array[]): Buffer {
|
|
assert(signatures && signatures.length > 0, "signatures is null or undefined or empty array");
|
|
return Signature.aggregate(
|
|
signatures.map(
|
|
(signature): Signature => {
|
|
return Signature.fromCompressedBytes(signature);
|
|
}
|
|
)
|
|
).toBytesCompressed();
|
|
}
|
|
|
|
/**
|
|
* Combines all given public keys into single one
|
|
* @param publicKeys
|
|
*/
|
|
export function aggregatePubkeys(publicKeys: Uint8Array[]): Buffer {
|
|
assert(publicKeys, "publicKeys is null or undefined");
|
|
if (publicKeys.length === 0) {
|
|
return Buffer.alloc(PUBLIC_KEY_LENGTH);
|
|
}
|
|
return publicKeys
|
|
.map((p) => PublicKey.fromBytes(toBuffer(p)))
|
|
.reduce((agg, pubKey) => agg.add(pubKey))
|
|
.toBytesCompressed();
|
|
}
|
|
|
|
/**
|
|
* Verifies if signature is message signed with given public key.
|
|
* @param publicKey
|
|
* @param messageHash
|
|
* @param signature
|
|
*/
|
|
export function verify(publicKey: Uint8Array, messageHash: Uint8Array, signature: Uint8Array): boolean {
|
|
assert(publicKey, "publicKey is null or undefined");
|
|
assert(messageHash, "messageHash is null or undefined");
|
|
assert(signature, "signature is null or undefined");
|
|
try {
|
|
return PublicKey.fromBytes(publicKey).verifyMessage(
|
|
Signature.fromCompressedBytes(toBuffer(signature)),
|
|
toBuffer(messageHash)
|
|
);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Verifies if aggregated signature is same message signed with given public keys.
|
|
* @param publicKeys
|
|
* @param messageHash
|
|
* @param signature
|
|
*/
|
|
export function verifyAggregate(publicKeys: Uint8Array[], messageHash: Uint8Array, signature: Uint8Array): boolean {
|
|
assert(publicKeys, "publicKey is null or undefined");
|
|
assert(messageHash, "messageHash is null or undefined");
|
|
assert(signature, "signature is null or undefined");
|
|
try {
|
|
return Signature.fromCompressedBytes(signature).verifyAggregate(
|
|
publicKeys.map((pubkey) => PublicKey.fromBytes(pubkey)),
|
|
messageHash
|
|
);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Verifies if signature is list of message signed with corresponding public key.
|
|
* @param publicKeys
|
|
* @param messageHashes
|
|
* @param signature
|
|
* @param fast Check if all messages are different
|
|
*/
|
|
export function verifyMultiple(
|
|
publicKeys: Uint8Array[],
|
|
messageHashes: Uint8Array[],
|
|
signature: Uint8Array,
|
|
fast = false
|
|
): boolean {
|
|
assert(publicKeys, "publicKey is null or undefined");
|
|
assert(messageHashes, "messageHash is null or undefined");
|
|
assert(signature, "signature is null or undefined");
|
|
|
|
if (publicKeys.length === 0 || publicKeys.length != messageHashes.length) {
|
|
return false;
|
|
}
|
|
try {
|
|
return Signature.fromCompressedBytes(toBuffer(signature)).verifyMultiple(
|
|
publicKeys.map((key) => PublicKey.fromBytes(toBuffer(key))),
|
|
messageHashes.map((m) => toBuffer(m)),
|
|
fast
|
|
);
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
export default {
|
|
generateKeyPair,
|
|
generatePublicKey,
|
|
sign,
|
|
aggregateSignatures,
|
|
aggregatePubkeys,
|
|
verify,
|
|
verifyAggregate,
|
|
verifyMultiple,
|
|
};
|