49 lines
1.1 KiB
TypeScript
49 lines
1.1 KiB
TypeScript
import { sha1, md5 } from "hash-wasm";
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import { HashDef } from "#types/hashDef.ts";
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/**
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* Returns the hash sum of bytes of given bytes using SHA1.
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*
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* This is what CurseForge and Forge are using to check files.
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*/
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const performSha1 = (inputBuffer: Buffer): Promise<string> => {
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return sha1(inputBuffer);
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};
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/**
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* Returns the hash sum of bytes of given bytes using MD5.
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*
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* This is what CF is using to check files.
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*/
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const performMd5 = (inputBuffer: Buffer): Promise<string> => {
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return md5(inputBuffer);
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};
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const hashFuncs: { [key: string]: (buffer: Buffer) => Promise<string> } = {
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sha1: performSha1,
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md5: performMd5,
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};
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/**
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* Compare buffer to the given HashDef.
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*
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* @param {Buffer} buffer
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* @param {HashDef} hashDef
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*
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* @throws {Error} Throws a generic error if hashes don't match.
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*/
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export async function compareBufferToHashDef(
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buffer: Buffer,
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hashDef: HashDef,
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): Promise<boolean> {
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if (!hashFuncs[hashDef.id]) {
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throw new Error(`No hash function found for ${hashDef.id}.`);
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}
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const sum = await hashFuncs[hashDef.id](buffer);
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return (
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(Array.isArray(hashDef.hashes) && hashDef.hashes.includes(sum)) ||
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hashDef.hashes == sum
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);
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}
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