Hash Functions in TypeScript

This project contains implementations of various hash functions in TypeScript, along with corresponding tests using Vitest.

Priority Order for Implementation

1. XOR-based Hash (Simple)

   • File: src/xorHash.ts
   • A basic hash function that uses the XOR operation on each byte of the input data.

2. Additive Checksum (Simple)

   • File: src/checksum.ts
   • A simple checksum that sums the byte values of the input data.

3. Fletcher's Checksum (Moderate)

   • File: src/fletcherChecksum.ts
   • A more complex checksum using two running sums for error detection.

4. LRC (Longitudinal Redundancy Check) (Simple)

   • File: src/lrc.ts
   • An XOR-based checksum that ensures the sum of all bytes is zero.

5. CRC32 (Cyclic Redundancy Check) (Moderate)

   • File: src/crc32.ts
   • A polynomial-based checksum used in network protocols and file integrity checks.

6. MD5 (Moderate)

   • File: src/md5.ts
   • A widely-used hash function that produces a 128-bit hash value, though not recommended for cryptographic use due to vulnerabilities.

7. SHA-1 (Moderate)

   • File: src/sha1.ts
   • A cryptographic hash function that produces a 160-bit hash value, also considered insecure for cryptographic purposes.

8. SHA-256 (Complex)

   • File: src/sha256.ts
   • A secure cryptographic hash function that produces a 256-bit hash value, commonly used in security protocols.

How to Use

Install Dependencies

npm install