copilot-swe-agent[bot]
130b53d37f
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
114 lines
3.8 KiB
Python
114 lines
3.8 KiB
Python
"""
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Security utilities for encryption, hashing, and token generation.
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"""
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import secrets
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from datetime import datetime, timedelta
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from typing import Optional, Dict, Any
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from cryptography.fernet import Fernet
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2
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import base64
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from app.core.config import settings
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# Password hashing context
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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"""Verify a password against its hash"""
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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"""Generate password hash"""
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return pwd_context.hash(password)
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def create_access_token(data: Dict[str, Any], expires_delta: Optional[timedelta] = None) -> str:
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"""Create JWT access token"""
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
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to_encode.update({"exp": expire, "type": "access"})
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encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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return encoded_jwt
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def create_refresh_token(data: Dict[str, Any]) -> str:
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"""Create JWT refresh token"""
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to_encode = data.copy()
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expire = datetime.utcnow() + timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
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to_encode.update({"exp": expire, "type": "refresh"})
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encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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return encoded_jwt
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def decode_token(token: str) -> Optional[Dict[str, Any]]:
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"""Decode and validate JWT token"""
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try:
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payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
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return payload
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except JWTError:
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return None
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def generate_random_token(length: int = 32) -> str:
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"""Generate a secure random token"""
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return secrets.token_urlsafe(length)
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class CredentialEncryption:
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"""Handles encryption/decryption of sensitive credentials (POP3/IMAP passwords)"""
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def __init__(self, key: Optional[str] = None):
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"""
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Initialize encryption with a key.
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If no key provided, uses the one from settings.
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"""
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if key is None:
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key = settings.ENCRYPTION_KEY
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# Derive a proper Fernet key from the provided key
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kdf = PBKDF2(
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algorithm=hashes.SHA256(),
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length=32,
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salt=b'pop3_forwarder_salt', # In production, use unique salt per user
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iterations=100000,
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)
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key_bytes = key.encode('utf-8')
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derived_key = base64.urlsafe_b64encode(kdf.derive(key_bytes))
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self.fernet = Fernet(derived_key)
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def encrypt(self, plain_text: str) -> str:
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"""Encrypt a string and return base64-encoded ciphertext"""
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encrypted = self.fernet.encrypt(plain_text.encode('utf-8'))
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return base64.b64encode(encrypted).decode('utf-8')
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def decrypt(self, encrypted_text: str) -> str:
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"""Decrypt a base64-encoded ciphertext"""
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encrypted_bytes = base64.b64decode(encrypted_text.encode('utf-8'))
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decrypted = self.fernet.decrypt(encrypted_bytes)
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return decrypted.decode('utf-8')
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# Global encryption instance
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credential_encryptor = CredentialEncryption()
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def encrypt_credential(credential: str) -> str:
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"""Convenience function to encrypt a credential"""
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return credential_encryptor.encrypt(credential)
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def decrypt_credential(encrypted_credential: str) -> str:
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"""Convenience function to decrypt a credential"""
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return credential_encryptor.decrypt(encrypted_credential)
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