secrets-scanner

Secrets Scanner

Detect and prevent leaked credentials in your codebase.

Secret Detection Patterns

# .gitleaks.toml
title = "Gitleaks Configuration"

[[rules]]
id = "aws-access-key"
description = "AWS Access Key"
regex = '''(A3T[A-Z0-9]|AKIA|AGPA|AIDA|AROA|AIPA|ANPA|ANVA|ASIA)[A-Z0-9]{16}'''
tags = ["key", "AWS"]

[[rules]]
id = "aws-secret-key"
description = "AWS Secret Key"
regex = '''(?i)aws(.{0,20})?(?-i)['\"][0-9a-zA-Z\/+]{40}['\"]'''
tags = ["key", "AWS"]

[[rules]]
id = "github-token"
description = "GitHub Personal Access Token"
regex = '''ghp_[0-9a-zA-Z]{36}'''
tags = ["key", "GitHub"]

[[rules]]
id = "github-oauth"
description = "GitHub OAuth Token"
regex = '''gho_[0-9a-zA-Z]{36}'''
tags = ["key", "GitHub"]

[[rules]]
id = "slack-webhook"
description = "Slack Webhook URL"
regex = '''https://hooks\.slack\.com/services/T[a-zA-Z0-9_]{8,10}/B[a-zA-Z0-9_]{8,10}/[a-zA-Z0-9_]{24}'''
tags = ["webhook", "Slack"]

[[rules]]
id = "private-key"
description = "Private Key"
regex = '''-----BEGIN (RSA|OPENSSH|DSA|EC|PGP) PRIVATE KEY-----'''
tags = ["key", "private"]

[[rules]]
id = "generic-api-key"
description = "Generic API Key"
regex = '''(?i)(api[_-]?key|apikey|access[_-]?key)(.{0,20})?['"][0-9a-zA-Z]{32,}['"]'''
tags = ["key", "generic"]

[[rules]]
id = "database-connection"
description = "Database Connection String"
regex = '''(?i)(postgresql|mysql|mongodb):\/\/[^\s:]+:[^\s@]+@[^\s\/]+'''
tags = ["database", "credentials"]

[allowlist]
description = "Allowlist"
paths = [
  '''node_modules/''',
  '''\.git/''',
  '''\.lock$''',
]

regexes = [
  '''EXAMPLE_KEY_123''',
  '''your_api_key_here''',
  '''<API_KEY>''',
]

## Pre-commit Hook Setup

```yaml
# .pre-commit-config.yaml
repos:
  - repo: https://github.com/gitleaks/gitleaks
    rev: v8.18.0
    hooks:
      - id: gitleaks

  - repo: https://github.com/Yelp/detect-secrets
    rev: v1.4.0
    hooks:
      - id: detect-secrets
        args: ['--baseline', '.secrets.baseline']

  - repo: local
    hooks:
      - id: check-env-files
        name: Check for .env files
        entry: bash -c 'if git diff --cached --name-only | grep -E "\.env$"; then echo "❌ .env file detected! Add to .gitignore"; exit 1; fi'
        language: system
        pass_filenames: false