HashSlap-Summer-of-Code/cipher-vault

Create Cryptographic Hash API in Java (Spring Boot)

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#12 opened on Jun 19, 2025

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Description

Description:
Develop a RESTful API in Java using Spring Boot that exposes endpoints to compute cryptographic hashes (e.g., SHA-256, SHA-512) of user-provided text. This introduces contributors to backend development and cryptographic APIs.

Expected Tasks:

  • Create a new api/ folder
  • Set up a basic Spring Boot application (HashVaultApplication.java)
  • Implement REST endpoints:
    • POST /hash — takes raw text and hashing algorithm as input
    • Returns computed hash (Base64 or hex format)
  • Store the hash results in-memory (e.g., using a ConcurrentHashMap)
  • Add basic error handling (e.g., invalid input or unsupported hash type)
  • Create an API.md file with:
    • Endpoint descriptions
    • Sample requests/responses using curl or Postman
  • Link this module from the root README.md

Stretch Tasks:

  • Add support for hash comparison (e.g., input hash vs. new input)
  • Add simple authentication (e.g., token-based or API key)

Contributor guide

Research direction
Set up a Spring Boot project, implement REST endpoints for hashing, and store results in memory. Refer to Spring Boot guides for REST APIs.
Tech stack
javaspring
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaSpring Boot basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80