app/utils/password.py

"""Password hashing and verification"""
import bcrypt


def hash_password(password: str) -> str:
    """
    Hash a plain text password using bcrypt
    
    Args:
        password: Plain text password
        
    Returns:
        Hashed password as string
    """
    # Bcrypt has a 72-byte limit, truncate if necessary
    password_bytes = password.encode('utf-8')
    if len(password_bytes) > 72:
        password_bytes = password_bytes[:72]
    
    # Generate salt and hash
    salt = bcrypt.gensalt()
    hashed = bcrypt.hashpw(password_bytes, salt)
    
    # Return as string
    return hashed.decode('utf-8')


def verify_password(plain_password: str, hashed_password: str) -> bool:
    """
    Verify a plain text password against a hashed password
    
    Args:
        plain_password: Plain text password
        hashed_password: Hashed password to verify against
        
    Returns:
        True if password matches, False otherwise
    """
    # Truncate to 72 bytes to match hashing behavior
    password_bytes = plain_password.encode('utf-8')
    if len(password_bytes) > 72:
        password_bytes = password_bytes[:72]
    
    # Convert hashed password to bytes if it's a string
    if isinstance(hashed_password, str):
        hashed_password = hashed_password.encode('utf-8')
    
    return bcrypt.checkpw(password_bytes, hashed_password)