Secrets Management

Secrets Management

HashiCorp Vault

vault server -dev
export VAULT_ADDR='http://127.0.0.1:8200'
export VAULT_TOKEN='root'
vault secrets enable -path=secret kv-v2
vault kv put secret/database/config username=admin password=secret

GitHub Actions with Vault

name: Deploy with Vault Secrets
on: [push]
jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Import Secrets from Vault
      uses: hashicorp/vault-action@v2
      with:
        url: https://vault.example.com:8200
        token: ${{ secrets.VAULT_TOKEN }}
        secrets: |
          secret/data/database username | DB_USERNAME ;
          secret/data/database password | DB_PASSWORD ;
          secret/data/api key | API_KEY
    - name: Use secrets
      run: echo "Connecting to database as $DB_USERNAME"

GitLab CI with Vault

deploy:
  image: vault:latest
  before_script:
    - export VAULT_ADDR=https://vault.example.com:8200
    - export VAULT_TOKEN=$VAULT_TOKEN
  script:
    - |
      DB_PASSWORD=$(vault kv get -field=password secret/database/config)
      API_KEY=$(vault kv get -field=key secret/api/credentials)

AWS Secrets Manager

aws secretsmanager create-secret \
  --name production/database/password \
  --secret-string "super-secret-password"

GitHub Actions

- name: Configure AWS credentials
  uses: aws-actions/configure-aws-credentials@v4
  with:
    aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
    aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
    aws-region: us-west-2
- name: Get secret from AWS
  run: |
    SECRET=$(aws secretsmanager get-secret-value \
      --secret-id production/database/password \
      --query SecretString --output text)
    echo "::add-mask::$SECRET"
    echo "DB_PASSWORD=$SECRET" >> $GITHUB_ENV

Terraform

data "aws_secretsmanager_secret_version" "db_password" {
  secret_id = "production/database/password"
}

resource "aws_db_instance" "main" {
  allocated_storage = 100
  engine            = "postgres"
  instance_class    = "db.t3.large"
  username          = "admin"
  password          = jsondecode(data.aws_secretsmanager_secret_version.db_password.secret_string)["password"]
}

Secret Rotation

import boto3, json

def lambda_handler(event, context):
    client = boto3.client('secretsmanager')
    response = client.get_secret_value(SecretId='my-secret')
    current_secret = json.loads(response['SecretString'])
    new_password = generate_strong_password()
    update_database_password(new_password)
    client.put_secret_value(
        SecretId='my-secret',
        SecretString=json.dumps({
            'username': current_secret['username'],
            'password': new_password
        })
    )
    return {'statusCode': 200}

External Secrets Operator (Kubernetes)

apiVersion: external-secrets.io/v1beta1
kind: SecretStore
metadata:
  name: vault-backend
  namespace: production
spec:
  provider:
    vault:
      server: "https://vault.example.com:8200"
      path: "secret"
      version: "v2"
      auth:
        kubernetes:
          mountPath: "kubernetes"
          role: "production"
---
apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: database-credentials
  namespace: production
spec:
  refreshInterval: 1h
  secretStoreRef:
    name: vault-backend
    kind: SecretStore
  target:
    name: database-credentials
    creationPolicy: Owner
  data:
  - secretKey: username
    remoteRef:
      key: database/config
      property: username
  - secretKey: password
    remoteRef:
      key: database/config
      property: password

Secret Scanning (Pre-commit)

#!/bin/bash
# .git/hooks/pre-commit
docker run --rm -v "$(pwd):/repo" \
  trufflesecurity/trufflehog:latest \
  filesystem --directory=/repo

if [ $? -ne 0 ]; then
  echo "Secret detected! Commit blocked."
  exit 1
fi

# CI/CD scanning
secret-scan:
  stage: security
  image: trufflesecurity/trufflehog:latest
  script:
    - trufflehog filesystem .
  allow_failure: false