import _sha1 from "sha1"; import _md5 from "md5"; import { HashDef } from "#types/hashDef.ts"; /** * Returns the hash sum of bytes of given bytes using SHA1. * * This is what CurseForge and Forge are using to check files. */ export const sha1 = (inputBuffer: Buffer): string => { return _sha1(inputBuffer); }; /** * Returns the hash sum of bytes of given bytes using MD5. * * This is what CF is using to check files. */ export const md5 = (inputBuffer: Buffer): string => { return _md5(inputBuffer); }; const hashFuncs: { [key: string]: (buffer: Buffer) => string } = { sha1, md5, }; /** * Compare buffer to the given HashDef. * * @param {Buffer} buffer * @param {HashDef} hashDef * * @throws {Error} Throws a generic error if hashes don't match. */ export const compareBufferToHashDef = ( buffer: Buffer, hashDef: HashDef, ): boolean => { if (!hashFuncs[hashDef.id]) { throw new Error(`No hash function found for ${hashDef.id}.`); } const sum = hashFuncs[hashDef.id](buffer); return ( (Array.isArray(hashDef.hashes) && hashDef.hashes.includes(sum)) || hashDef.hashes == sum ); };