112 lines
3.4 KiB
TypeScript
112 lines
3.4 KiB
TypeScript
import assert from "assert";
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import {IBls} from "./interface";
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// Returned type is enforced at each implementation's index
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// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
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export function functionalInterfaceFactory({
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PrivateKey,
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PublicKey,
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Signature,
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}: Pick<IBls, "PrivateKey" | "PublicKey" | "Signature">) {
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/**
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* Signs given message using secret key.
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* @param secretKey
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* @param messageHash
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*/
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function sign(secretKey: Uint8Array, messageHash: Uint8Array): Buffer {
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assert(secretKey, "secretKey is null or undefined");
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assert(messageHash, "messageHash is null or undefined");
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const privateKey = PrivateKey.fromBytes(secretKey);
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return privateKey.signMessage(messageHash).toBytes();
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}
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/**
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* Compines all given signature into one.
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* @param signatures
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*/
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function aggregateSignatures(signatures: Uint8Array[]): Buffer {
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const agg = Signature.aggregate(signatures.map((p) => Signature.fromBytes(p)));
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return agg.toBytes();
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}
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/**
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* Combines all given public keys into single one
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* @param publicKeys
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*/
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function aggregatePubkeys(publicKeys: Uint8Array[]): Buffer {
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const agg = PublicKey.aggregate(publicKeys.map((p) => PublicKey.fromBytes(p)));
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return agg.toBytes();
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}
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/**
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* Verifies if signature is message signed with given public key.
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* @param publicKey
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* @param messageHash
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* @param signature
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*/
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function verify(publicKey: Uint8Array, messageHash: Uint8Array, signature: Uint8Array): boolean {
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assert(publicKey, "publicKey is null or undefined");
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assert(messageHash, "messageHash is null or undefined");
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assert(signature, "signature is null or undefined");
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try {
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return Signature.fromBytes(signature).verify(PublicKey.fromBytes(publicKey), messageHash);
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} catch (e) {
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return false;
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}
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}
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/**
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* Verifies if aggregated signature is same message signed with given public keys.
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* @param publicKeys
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* @param messageHash
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* @param signature
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*/
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function verifyAggregate(publicKeys: Uint8Array[], messageHash: Uint8Array, signature: Uint8Array): boolean {
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assert(publicKeys, "publicKey is null or undefined");
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assert(messageHash, "messageHash is null or undefined");
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assert(signature, "signature is null or undefined");
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try {
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return Signature.fromBytes(signature).verifyAggregate(
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publicKeys.map((pubkey) => PublicKey.fromBytes(pubkey)),
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messageHash
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);
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} catch (e) {
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return false;
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}
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}
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/**
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* Verifies if signature is list of message signed with corresponding public key.
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* @param publicKeys
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* @param messageHashes
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* @param signature
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* @param fast Check if all messages are different
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*/
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function verifyMultiple(publicKeys: Uint8Array[], messageHashes: Uint8Array[], signature: Uint8Array): boolean {
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assert(publicKeys, "publicKey is null or undefined");
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assert(messageHashes, "messageHash is null or undefined");
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assert(signature, "signature is null or undefined");
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if (publicKeys.length === 0 || publicKeys.length != messageHashes.length) {
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return false;
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}
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try {
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return Signature.fromBytes(signature).verifyMultiple(
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publicKeys.map((publicKey) => PublicKey.fromBytes(publicKey)),
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messageHashes.map((msg) => msg)
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);
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} catch (e) {
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return false;
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}
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}
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return {
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sign,
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aggregateSignatures,
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aggregatePubkeys,
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verify,
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verifyAggregate,
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verifyMultiple,
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};
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}
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