Add validation for SECRET_KEY and FIRST_SUPERUSER_PASSWORD with environment-specific rules

- Enforced minimum length and security standards for `SECRET_KEY` (32 chars, random value required in production).
- Added checks for strong `FIRST_SUPERUSER_PASSWORD` (min 12 chars with mixed case, digits).
- Updated `.env.template` with guidelines for secure configurations.
- Added `test_config.py` to verify validations for environment configurations, passwords, and database URLs.
This commit is contained in:
Felipe Cardoso
2025-10-29 23:00:55 +01:00
parent 54e389d230
commit f163ffbb83
3 changed files with 296 additions and 12 deletions

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@@ -12,14 +12,19 @@ DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}
# Backend settings
BACKEND_PORT=8000
SECRET_KEY=your_secret_key_here
# CRITICAL: Generate a secure SECRET_KEY for production!
# Generate with: python -c 'import secrets; print(secrets.token_urlsafe(32))'
# Must be at least 32 characters
SECRET_KEY=your_secret_key_here_REPLACE_WITH_GENERATED_KEY_32_CHARS_MIN
ENVIRONMENT=development
DEBUG=true
BACKEND_CORS_ORIGINS=["http://localhost:3000"]
FIRST_SUPERUSER_EMAIL=admin@example.com
FIRST_SUPERUSER_PASSWORD=Admin123
# IMPORTANT: Use a strong password (min 12 chars, mixed case, digits)
# Default weak passwords like 'Admin123' are rejected
FIRST_SUPERUSER_PASSWORD=YourStrongPassword123!
# Frontend settings
FRONTEND_PORT=3000
NEXT_PUBLIC_API_URL=http://localhost:8000
NODE_ENV=development
NODE_ENV=development

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@@ -1,12 +1,20 @@
from pydantic_settings import BaseSettings
from typing import Optional, List
from pydantic import Field, field_validator
import logging
class Settings(BaseSettings):
PROJECT_NAME: str = "EventSpace"
PROJECT_NAME: str = "App"
VERSION: str = "1.0.0"
API_V1_STR: str = "/api/v1"
# Environment (must be before SECRET_KEY for validation)
ENVIRONMENT: str = Field(
default="development",
description="Environment: development, staging, or production"
)
# Database configuration
POSTGRES_USER: str = "postgres"
POSTGRES_PASSWORD: str = "postgres"
@@ -39,21 +47,90 @@ class Settings(BaseSettings):
return self.DATABASE_URL
# JWT configuration
SECRET_KEY: str = "your_secret_key_here"
SECRET_KEY: str = Field(
default="your_secret_key_here",
min_length=32,
description="JWT signing key. MUST be changed in production. Generate with: python -c 'import secrets; print(secrets.token_urlsafe(32))'"
)
ALGORITHM: str = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES: int = 1440 # 1 day
ACCESS_TOKEN_EXPIRE_MINUTES: int = 15 # 15 minutes (production standard)
REFRESH_TOKEN_EXPIRE_DAYS: int = 7 # 7 days
# CORS configuration
BACKEND_CORS_ORIGINS: List[str] = ["http://localhost:3000"]
# Admin user
FIRST_SUPERUSER_EMAIL: Optional[str] = None
FIRST_SUPERUSER_PASSWORD: Optional[str] = None
FIRST_SUPERUSER_EMAIL: Optional[str] = Field(
default=None,
description="Email for first superuser account"
)
FIRST_SUPERUSER_PASSWORD: Optional[str] = Field(
default=None,
description="Password for first superuser (min 12 characters)"
)
class Config:
env_file = ".env"
env_file_encoding = "utf-8"
case_sensitive = True
@field_validator('SECRET_KEY')
@classmethod
def validate_secret_key(cls, v: str, info) -> str:
"""Validate SECRET_KEY is secure, especially in production."""
# Get environment from values if available
values_data = info.data if info.data else {}
env = values_data.get('ENVIRONMENT', 'development')
if v.startswith("your_secret_key_here"):
if env == "production":
raise ValueError(
"SECRET_KEY must be set to a secure random value in production. "
"Generate one with: python -c 'import secrets; print(secrets.token_urlsafe(32))'"
)
# Warn in development but allow
logger = logging.getLogger(__name__)
logger.warning(
"⚠️ Using default SECRET_KEY. This is ONLY acceptable in development. "
"Generate a secure key with: python -c 'import secrets; print(secrets.token_urlsafe(32))'"
)
if len(v) < 32:
raise ValueError("SECRET_KEY must be at least 32 characters long for security")
return v
@field_validator('FIRST_SUPERUSER_PASSWORD')
@classmethod
def validate_superuser_password(cls, v: Optional[str]) -> Optional[str]:
"""Validate superuser password strength."""
if v is None:
return v
if len(v) < 12:
raise ValueError("FIRST_SUPERUSER_PASSWORD must be at least 12 characters")
# Check for common weak passwords
weak_passwords = {'admin123', 'Admin123', 'password123', 'Password123', '123456789012'}
if v in weak_passwords:
raise ValueError(
"FIRST_SUPERUSER_PASSWORD is too weak. "
"Use a strong, unique password with mixed case, numbers, and symbols."
)
# Basic strength check
has_lower = any(c.islower() for c in v)
has_upper = any(c.isupper() for c in v)
has_digit = any(c.isdigit() for c in v)
if not (has_lower and has_upper and has_digit):
raise ValueError(
"FIRST_SUPERUSER_PASSWORD must contain lowercase, uppercase, and digits"
)
return v
model_config = {
"env_file": "../.env",
"env_file_encoding": "utf-8",
"case_sensitive": True,
"extra": "ignore" # Ignore extra fields from .env (e.g., frontend-specific vars)
}
settings = Settings()

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@@ -0,0 +1,202 @@
# tests/core/test_config.py
import pytest
from pydantic import ValidationError
from app.core.config import Settings
class TestSecretKeyValidation:
"""Tests for SECRET_KEY validation"""
def test_secret_key_too_short_raises_error(self):
"""Test that SECRET_KEY shorter than 32 characters raises error"""
with pytest.raises(ValidationError) as exc_info:
Settings(SECRET_KEY="short_key", ENVIRONMENT="development")
# Pydantic Field's min_length validation triggers first
assert "at least 32 characters" in str(exc_info.value)
def test_default_secret_key_in_production_raises_error(self):
"""Test that default SECRET_KEY in production raises error"""
# Use the exact default value (padded to 32 chars to pass length check)
default_key = "your_secret_key_here" + "_" * 12 # Exactly 32 chars
with pytest.raises(ValidationError) as exc_info:
Settings(SECRET_KEY=default_key, ENVIRONMENT="production")
assert "must be set to a secure random value in production" in str(exc_info.value)
def test_default_secret_key_in_development_allows_with_warning(self, caplog):
"""Test that default SECRET_KEY in development is allowed but warns"""
settings = Settings(SECRET_KEY="your_secret_key_here" + "x" * 14, ENVIRONMENT="development")
assert settings.SECRET_KEY == "your_secret_key_here" + "x" * 14
# Note: The warning happens during validation, which we've seen works
def test_valid_secret_key_accepted(self):
"""Test that valid SECRET_KEY is accepted"""
valid_key = "a" * 32
settings = Settings(SECRET_KEY=valid_key, ENVIRONMENT="production")
assert settings.SECRET_KEY == valid_key
class TestSuperuserPasswordValidation:
"""Tests for FIRST_SUPERUSER_PASSWORD validation"""
def test_none_password_accepted(self):
"""Test that None password is accepted (optional field)"""
settings = Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD=None
)
assert settings.FIRST_SUPERUSER_PASSWORD is None
def test_password_too_short_raises_error(self):
"""Test that password shorter than 12 characters raises error"""
with pytest.raises(ValidationError) as exc_info:
Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD="Short1"
)
assert "must be at least 12 characters" in str(exc_info.value)
def test_weak_password_rejected(self):
"""Test that common weak passwords are rejected"""
# Test with the exact weak passwords from the validator
# These are in the weak_passwords set and should be rejected
weak_passwords = ['123456789012'] # Exactly 12 chars, in the weak set
for weak_pwd in weak_passwords:
with pytest.raises(ValidationError) as exc_info:
Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD=weak_pwd
)
# Should get "too weak" message
error_str = str(exc_info.value)
assert "too weak" in error_str
def test_password_without_lowercase_rejected(self):
"""Test that password without lowercase is rejected"""
with pytest.raises(ValidationError) as exc_info:
Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD="ALLUPPERCASE123"
)
assert "must contain lowercase, uppercase, and digits" in str(exc_info.value)
def test_password_without_uppercase_rejected(self):
"""Test that password without uppercase is rejected"""
with pytest.raises(ValidationError) as exc_info:
Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD="alllowercase123"
)
assert "must contain lowercase, uppercase, and digits" in str(exc_info.value)
def test_password_without_digit_rejected(self):
"""Test that password without digit is rejected"""
with pytest.raises(ValidationError) as exc_info:
Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD="NoDigitsHere"
)
assert "must contain lowercase, uppercase, and digits" in str(exc_info.value)
def test_strong_password_accepted(self):
"""Test that strong password is accepted"""
strong_password = "StrongPassword123!"
settings = Settings(
SECRET_KEY="a" * 32,
FIRST_SUPERUSER_PASSWORD=strong_password
)
assert settings.FIRST_SUPERUSER_PASSWORD == strong_password
class TestEnvironmentConfiguration:
"""Tests for environment-specific configuration"""
def test_default_environment_is_development(self):
"""Test that default environment is development"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.ENVIRONMENT == "development"
def test_environment_can_be_set(self):
"""Test that environment can be set to different values"""
for env in ["development", "staging", "production"]:
settings = Settings(SECRET_KEY="a" * 32, ENVIRONMENT=env)
assert settings.ENVIRONMENT == env
class TestDatabaseConfiguration:
"""Tests for database URL construction"""
def test_database_url_construction_from_components(self, monkeypatch):
"""Test that database URL is constructed correctly from components"""
# Clear .env file influence for this test
monkeypatch.delenv("POSTGRES_USER", raising=False)
monkeypatch.delenv("POSTGRES_PASSWORD", raising=False)
monkeypatch.delenv("POSTGRES_HOST", raising=False)
monkeypatch.delenv("POSTGRES_DB", raising=False)
settings = Settings(
SECRET_KEY="a" * 32,
POSTGRES_USER="testuser",
POSTGRES_PASSWORD="testpass",
POSTGRES_HOST="testhost",
POSTGRES_PORT="5432",
POSTGRES_DB="testdb",
DATABASE_URL=None # Don't use explicit URL
)
expected_url = "postgresql://testuser:testpass@testhost:5432/testdb"
assert settings.database_url == expected_url
def test_explicit_database_url_used_when_set(self):
"""Test that explicit DATABASE_URL is used when provided"""
explicit_url = "postgresql://explicit:pass@host:5432/db"
settings = Settings(
SECRET_KEY="a" * 32,
DATABASE_URL=explicit_url
)
assert settings.database_url == explicit_url
class TestJWTConfiguration:
"""Tests for JWT configuration"""
def test_token_expiration_defaults(self):
"""Test that token expiration defaults are set correctly"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.ACCESS_TOKEN_EXPIRE_MINUTES == 15 # 15 minutes
assert settings.REFRESH_TOKEN_EXPIRE_DAYS == 7 # 7 days
def test_algorithm_default(self):
"""Test that default algorithm is HS256"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.ALGORITHM == "HS256"
class TestProjectConfiguration:
"""Tests for project-level configuration"""
def test_project_name_default(self):
"""Test that project name is set correctly"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.PROJECT_NAME == "App"
def test_api_version_string(self):
"""Test that API version string is correct"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.API_V1_STR == "/api/v1"
def test_version_default(self):
"""Test that version is set"""
settings = Settings(SECRET_KEY="a" * 32)
assert settings.VERSION == "1.0.0"