shaha

Hash database builder and reverse lookup tool. SHA + aha!

Build precomputed hash databases from wordlists, then query them to find preimages.

Installation

cargo install shaha

Or build from source:

git clone https://github.com/oritwoen/shaha
cd shaha
cargo build --release

Usage

Build a hash database

# Single algorithm (default: sha256)
shaha build words.txt

# Multiple algorithms
shaha build words.txt -a md5 -a sha256 -a keccak256

# Custom output file
shaha build words.txt -o mydb.parquet

# With source metadata
shaha build rockyou.txt -a hash160 -s rockyou

Query for preimage

# Find preimage by hash
shaha query 5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8

# Prefix search
shaha query 5e8848

# Filter by algorithm
shaha query 5e8848 -a sha256

# Output formats
shaha query 5e8848 --format plain   # default
shaha query 5e8848 --format json
shaha query 5e8848 --format table

Database info

shaha info hashes.parquet

Output:

Database: "hashes.parquet"
Records:  1000000
Size:     45.32 MB
Algorithms: sha256, md5, keccak256
Sources:  rockyou

Algorithms

Storage Format

Databases are stored as Apache Parquet files with ZSTD compression.

Schema:

• hash (Binary) - hash bytes
• preimage (Utf8) - original input data
• algorithm (Utf8) - algorithm name
• sources (List) - wordlist origins

Parquet files can be queried with DuckDB, Polars, Spark, or Cloudflare R2 SQL.

Use Cases

• Security research - reverse hash lookups
• CTF challenges - quick hash cracking
• Forensics - identify known passwords
• Blockchain analysis - Bitcoin/Ethereum address research

Configuration

Configuration is loaded from (in order of priority):

1. CLI flags
2. Environment variables
3. .shaha.toml in current directory
4. ~/.config/shaha/config.toml

Example config file

[storage.r2]
endpoint = "https://account-id.r2.cloudflarestorage.com"
bucket = "my-bucket"
access_key_id = "your-access-key"
secret_access_key = "your-secret-key"
region = "auto"
path = "hashes.parquet"

[defaults]
algorithms = ["sha256", "md5"]
output = "hashes.parquet"

R2/S3 Storage

Build and query directly from Cloudflare R2 or S3-compatible storage:

# Build to R2
shaha build words.txt --r2

# Query from R2
shaha query 5e8848 --r2

Environment variables:

• SHAHA_R2_ENDPOINT - S3/R2 endpoint URL
• SHAHA_R2_BUCKET - Bucket name
• SHAHA_R2_ACCESS_KEY_ID or AWS_ACCESS_KEY_ID
• SHAHA_R2_SECRET_ACCESS_KEY or AWS_SECRET_ACCESS_KEY
• SHAHA_R2_PATH - Path within bucket
• SHAHA_R2_REGION - Region (default: "auto")

Roadmap

• R2 Data Catalog - Apache Iceberg integration for faster queries

License

MIT