Token Management

class OAuth2Token(dict[str, str]):
    def __init__(
        self,
        params: dict[str, str],
        old_scope: str | list[str] | None = None,
    ): ...
    
    @property
    def scope_changed(self) -> bool:
        """Whether scope changed from original token."""
    
    @property
    def old_scope(self) -> str | None:
        """Original token scope as string."""
    
    @property
    def old_scopes(self) -> list[str]:
        """Original token scopes as list."""
    
    @property
    def scope(self) -> str | None:
        """Current token scope as string."""
    
    @property
    def scopes(self) -> list[str]:
        """Current token scopes as list."""
    
    @property
    def missing_scopes(self) -> list[str]:
        """Scopes that were removed from original."""
    
    @property
    def additional_scopes(self) -> list[str]:
        """Scopes that were added to original."""

class BearerToken:
    def __init__(
        self,
        request_validator=None,
        token_generator=None,
        expires_in: int | None = None,
        refresh_token_generator=None,
    ):
        """
        Bearer token handler.
        
        Parameters:
        - request_validator: Request validator instance
        - token_generator: Function to generate access tokens
        - expires_in: Token expiration time in seconds
        - refresh_token_generator: Function to generate refresh tokens
        """
    
    def create_token(
        self,
        request,
        refresh_token: bool = False,
        **kwargs,
    ) -> OAuth2Token:
        """
        Create new bearer token.
        
        Parameters:
        - request: OAuth request object
        - refresh_token: Whether to include refresh token
        
        Returns:
        OAuth2Token with access token and optional refresh token
        """
    
    def validate_request(self, request) -> bool:
        """Validate bearer token request."""
    
    def estimate_type(self, request) -> int:
        """Estimate confidence that request uses bearer tokens."""

def prepare_bearer_uri(token: str, uri: str) -> str:
    """Add bearer token to URI query parameters."""

def prepare_bearer_headers(
    token: str,
    headers: dict[str, str] | None = None,
) -> dict[str, str]:
    """Add bearer token to Authorization header."""

def prepare_bearer_body(token: str, body: str = "") -> str:
    """Add bearer token to request body."""

def get_token_from_header(request) -> str | None:
    """Extract bearer token from Authorization header."""

def prepare_mac_header(
    token: str,
    uri: str,
    key: str | bytes | bytearray,
    http_method: str,
    nonce: str | None = None,
    headers: dict[str, str] | None = None,
    body: str | None = None,
    ext: str = "",
    hash_algorithm: str = "hmac-sha-1",
    issue_time: datetime | None = None,
    draft: int = 0,
) -> dict[str, str]:
    """Prepare MAC authentication header."""

def random_token_generator(request, refresh_token: bool = False) -> str:
    """Generate random token using cryptographically secure methods."""

def signed_token_generator(private_pem: str, **kwargs) -> callable:
    """
    Create signed token generator using RSA private key.
    
    Parameters:
    - private_pem: RSA private key in PEM format
    
    Returns:
    Function that generates signed JWT tokens
    """

from oauthlib.oauth2 import BearerToken, RequestValidator

class MyRequestValidator(RequestValidator):
    def validate_bearer_token(self, token, scopes, request):
        # Validate bearer token from database
        token_data = get_token_from_db(token)
        if not token_data or token_data.expired:
            return False
        
        # Check if token has required scopes
        token_scopes = token_data.scopes.split()
        return all(scope in token_scopes for scope in scopes)
    
    def save_bearer_token(self, token, request, *args, **kwargs):
        # Store bearer token in database
        store_token_in_db(token, request.user_id, request.client_id)

# Create bearer token handler
validator = MyRequestValidator()
bearer_token = BearerToken(
    request_validator=validator,
    expires_in=3600,  # 1 hour
)

# Create token for authorized request
token = bearer_token.create_token(request, refresh_token=True)
# Returns: {
#   'access_token': 'abc123...',
#   'token_type': 'Bearer',
#   'expires_in': 3600,
#   'refresh_token': 'def456...',
#   'scope': 'read write'
# }

import jwt
from datetime import datetime, timedelta
from oauthlib.common import generate_token

def jwt_token_generator(request):
    """Generate JWT access tokens."""
    payload = {
        'sub': request.user_id,
        'client_id': request.client_id,
        'scopes': request.scopes,
        'iat': datetime.utcnow(),
        'exp': datetime.utcnow() + timedelta(hours=1),
        'jti': generate_token(16)  # JWT ID
    }
    return jwt.encode(payload, 'your-secret-key', algorithm='HS256')

# Use custom generator
bearer_token = BearerToken(
    request_validator=validator,
    token_generator=jwt_token_generator,
    refresh_token_generator=lambda req: generate_token(32)
)

from oauthlib.oauth2.rfc6749.tokens import (
    prepare_bearer_headers, 
    prepare_bearer_uri,
    prepare_bearer_body
)

access_token = 'abc123def456'

# Add token to Authorization header (recommended)
headers = prepare_bearer_headers(access_token)
# {'Authorization': 'Bearer abc123def456'}

# Add token to URI query (less secure)
uri = prepare_bearer_uri(access_token, 'https://api.example.com/data')
# 'https://api.example.com/data?access_token=abc123def456'

# Add token to request body (for POST requests)
body = prepare_bearer_body(access_token, 'data=value')
# 'data=value&access_token=abc123def456'

from oauthlib.oauth2.rfc6749.tokens import get_token_from_header

def validate_api_request(request):
    """Validate API request with bearer token."""
    
    # Extract token from request
    token = get_token_from_header(request)
    if not token:
        return False, "Missing access token"
    
    # Validate token
    token_data = get_token_from_database(token)
    if not token_data:
        return False, "Invalid access token"
    
    if token_data.expired:
        return False, "Access token expired"
    
    # Check scopes for this endpoint
    required_scopes = ['api:read']
    token_scopes = token_data.scopes.split()
    if not all(scope in token_scopes for scope in required_scopes):
        return False, "Insufficient scope"
    
    return True, token_data

from oauthlib.oauth2.rfc6749.tokens import OAuth2Token

# Create token from server response
response_data = {
    'access_token': 'abc123',
    'token_type': 'Bearer',
    'expires_in': 3600,
    'refresh_token': 'def456',
    'scope': 'read write admin'
}

token = OAuth2Token(response_data, old_scope='read write')

# Check scope changes
print(token.scope_changed)  # True (admin scope added)
print(token.scopes)  # ['read', 'write', 'admin']
print(token.old_scopes)  # ['read', 'write']  
print(token.additional_scopes)  # ['admin']
print(token.missing_scopes)  # []

# Token acts like a dictionary
print(token['access_token'])  # 'abc123'
print(token.get('expires_in'))  # 3600

from oauthlib.oauth2.rfc6749.tokens import prepare_mac_header
import datetime

# Prepare MAC authentication header
mac_header = prepare_mac_header(
    token='h480djs93hd8',
    uri='https://api.example.com/data',
    key='secret-mac-key',
    http_method='GET',
    nonce='unique-nonce-123',
    hash_algorithm='hmac-sha-256',
    issue_time=datetime.datetime.utcnow()
)

print(mac_header)
# {
#   'Authorization': 'MAC id="h480djs93hd8", nonce="unique-nonce-123", 
#                     ts="1234567890", mac="signature..."'
# }

def refresh_access_token(refresh_token, client_id, client_secret):
    """Refresh an expired access token."""
    from oauthlib.oauth2 import WebApplicationClient
    import requests
    
    client = WebApplicationClient(client_id)
    
    # Prepare refresh request
    token_url, headers, body = client.prepare_refresh_token_request(
        'https://auth.example.com/token',
        refresh_token=refresh_token,
        scope=['read', 'write']  # Optional: request different scopes
    )
    
    # Add client authentication
    headers['Authorization'] = f'Basic {base64.b64encode(f"{client_id}:{client_secret}".encode()).decode()}'
    
    # Make request
    response = requests.post(token_url, headers=headers, data=body)
    
    if response.status_code == 200:
        return client.parse_request_body_response(response.text)
    else:
        raise Exception(f"Token refresh failed: {response.text}")

def revoke_token(token, token_type_hint, client_id, client_secret):
    """Revoke an access or refresh token."""
    from oauthlib.oauth2 import WebApplicationClient
    import requests
    
    client = WebApplicationClient(client_id)
    
    # Prepare revocation request
    revoke_url, headers, body = client.prepare_token_revocation_request(
        'https://auth.example.com/revoke',
        token=token,
        token_type_hint=token_type_hint  # 'access_token' or 'refresh_token'
    )
    
    # Add client authentication
    headers['Authorization'] = f'Basic {base64.b64encode(f"{client_id}:{client_secret}".encode()).decode()}'
    
    # Make request
    response = requests.post(revoke_url, headers=headers, data=body)
    
    return response.status_code == 200