684 lines
24 KiB
Python
684 lines
24 KiB
Python
import re
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import time
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from flask import Blueprint, request, jsonify, g
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from app import db, limiter
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from app.models.user import User
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from app.models.audit_log import AuditLog
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from app.services.auth_service import (
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hash_auth_token,
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verify_auth_token,
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generate_tokens,
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generate_mfa_token,
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decode_token,
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blacklist_token,
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require_jwt,
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encrypt_totp_secret,
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decrypt_totp_secret,
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)
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auth_bp = Blueprint('auth', __name__)
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EMAIL_RE = re.compile(r'^[^@\s]+@[^@\s]+\.[^@\s]+$')
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def _client_ip():
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"""Return the best-effort client IP from the request context."""
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return request.headers.get('X-Forwarded-For', request.remote_addr or '').split(',')[0].strip()
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@auth_bp.route('/register', methods=['POST'])
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@limiter.limit('10 per minute')
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def register():
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data = request.get_json(silent=True) or {}
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email = (data.get('email') or '').strip().lower()
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auth_hash = data.get('auth_hash', '')
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enc_key_salt = data.get('enc_key_salt', '')
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if not email or not EMAIL_RE.match(email):
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return jsonify({'error': 'Invalid email address'}), 400
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if not auth_hash:
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return jsonify({'error': 'auth_hash is required'}), 400
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if not enc_key_salt:
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return jsonify({'error': 'enc_key_salt is required'}), 400
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if User.query.filter_by(email=email).first():
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return jsonify({'error': 'Email already registered'}), 409
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master_hash = hash_auth_token(auth_hash)
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user = User(email=email, master_hash=master_hash, enc_key_salt=enc_key_salt)
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db.session.add(user)
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db.session.flush() # populate user.id before logging
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AuditLog.log(
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user_id=user.id,
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action='auth.register',
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resource_type='user',
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resource_id=user.id,
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detail=f'New account registered: {email}',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'message': 'Account created successfully'}), 201
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@auth_bp.route('/login', methods=['POST'])
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@limiter.limit('10 per minute')
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def login():
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data = request.get_json(silent=True) or {}
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email = (data.get('email') or '').strip().lower()
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auth_hash = data.get('auth_hash', '')
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time.sleep(0.1) # mitigate timing-based user enumeration
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if not email or not auth_hash:
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return jsonify({'error': 'Email and auth_hash are required'}), 400
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user = User.query.filter_by(email=email).first()
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if not user or not verify_auth_token(auth_hash, user.master_hash):
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if user:
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AuditLog.log(
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user_id=user.id,
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action='auth.login_failed',
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resource_type='user',
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resource_id=user.id,
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detail='Failed login attempt — invalid password',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'error': 'Invalid email or password'}), 401
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from datetime import datetime
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user.last_login = datetime.utcnow()
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AuditLog.log(
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user_id=user.id,
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action='auth.login',
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resource_type='user',
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resource_id=user.id,
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detail=f'Successful login{" (MFA pending)" if user.totp_enabled else ""}',
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ip_address=_client_ip(),
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)
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db.session.commit()
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# MFA gate: if enabled, issue a short-lived mfa_token instead of full tokens
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if user.totp_enabled:
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mfa_token = generate_mfa_token(user.id)
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return jsonify({
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'mfa_required': True,
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'mfa_token': mfa_token,
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'enc_key_salt': user.enc_key_salt,
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}), 200
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tokens = generate_tokens(user.id)
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return jsonify({
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'access_token': tokens['access_token'],
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'refresh_token': tokens['refresh_token'],
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'enc_key_salt': user.enc_key_salt,
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}), 200
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@auth_bp.route('/logout', methods=['POST'])
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def logout():
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"""Blacklist both the access token (from header) and refresh token (from body)."""
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auth_header = request.headers.get('Authorization', '')
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if auth_header.startswith('Bearer '):
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blacklist_token(auth_header[7:], 'access')
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data = request.get_json(silent=True) or {}
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refresh_token = data.get('refresh_token', '')
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if refresh_token:
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blacklist_token(refresh_token, 'refresh')
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return jsonify({'message': 'Logged out'}), 200
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@auth_bp.route('/refresh', methods=['POST'])
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@limiter.limit('30 per minute')
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def refresh():
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data = request.get_json(silent=True) or {}
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refresh_token = data.get('refresh_token', '')
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if not refresh_token:
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return jsonify({'error': 'refresh_token is required'}), 400
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try:
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payload = decode_token(refresh_token, expected_type='refresh')
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except Exception:
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return jsonify({'error': 'Invalid or expired refresh token'}), 401
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# Rotate: blacklist old refresh token and issue fresh pair
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blacklist_token(refresh_token, 'refresh')
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tokens = generate_tokens(int(payload['sub']))
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return jsonify({
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'access_token': tokens['access_token'],
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'refresh_token': tokens['refresh_token'],
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}), 200
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# ── MFA / TOTP endpoints ─────────────────────────────────────────────────────
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@auth_bp.route('/mfa/setup', methods=['GET'])
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@require_jwt
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def mfa_setup():
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"""Generate a new TOTP secret and return QR code (as base64 PNG data URI)."""
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user = db.session.get(User, g.current_user_id)
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if user.totp_enabled:
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return jsonify({'error': 'MFA is already enabled'}), 400
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import pyotp
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import qrcode
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import io
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import base64
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secret = pyotp.random_base32()
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uri = pyotp.TOTP(secret).provisioning_uri(
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name=user.email,
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issuer_name='PassKeeper',
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)
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img = qrcode.make(uri)
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buf = io.BytesIO()
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img.save(buf, format='PNG')
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qr_b64 = base64.b64encode(buf.getvalue()).decode()
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return jsonify({
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'secret': secret,
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'qr_code': f'data:image/png;base64,{qr_b64}',
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'uri': uri,
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}), 200
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@auth_bp.route('/mfa/enable', methods=['POST'])
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@require_jwt
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def mfa_enable():
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"""Enable MFA after verifying the first TOTP code."""
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user = db.session.get(User, g.current_user_id)
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if user.totp_enabled:
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return jsonify({'error': 'MFA is already enabled'}), 400
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data = request.get_json(silent=True) or {}
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secret = (data.get('secret') or '').strip()
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totp_code = (data.get('totp_code') or '').strip()
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if not secret or not totp_code:
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return jsonify({'error': 'secret and totp_code are required'}), 400
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import pyotp
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if not pyotp.TOTP(secret).verify(totp_code, valid_window=1):
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return jsonify({'error': 'Invalid verification code'}), 400
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totp_secret_enc, totp_iv = encrypt_totp_secret(secret)
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user.totp_secret = totp_secret_enc
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user.totp_iv = totp_iv
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user.totp_enabled = True
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AuditLog.log(
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user_id=user.id,
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action='auth.mfa_enable',
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resource_type='user',
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resource_id=user.id,
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detail='TOTP two-factor authentication enabled',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'message': 'MFA enabled successfully'}), 200
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@auth_bp.route('/mfa/disable', methods=['POST'])
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@require_jwt
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def mfa_disable():
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"""Disable MFA after verifying the current TOTP code."""
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user = db.session.get(User, g.current_user_id)
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if not user.totp_enabled:
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return jsonify({'error': 'MFA is not enabled'}), 400
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data = request.get_json(silent=True) or {}
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totp_code = (data.get('totp_code') or '').strip()
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import pyotp
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plaintext_secret = decrypt_totp_secret(user.totp_secret, user.totp_iv)
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if not pyotp.TOTP(plaintext_secret).verify(totp_code, valid_window=1):
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return jsonify({'error': 'Invalid verification code'}), 400
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user.totp_secret = None
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user.totp_iv = None
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user.totp_enabled = False
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AuditLog.log(
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user_id=user.id,
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action='auth.mfa_disable',
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resource_type='user',
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resource_id=user.id,
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detail='TOTP two-factor authentication disabled',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'message': 'MFA disabled'}), 200
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@auth_bp.route('/mfa/verify', methods=['POST'])
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@limiter.limit('10 per minute')
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def mfa_verify():
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"""Complete MFA login: verify TOTP code and exchange mfa_token for real tokens."""
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data = request.get_json(silent=True) or {}
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mfa_token = data.get('mfa_token', '')
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totp_code = (data.get('totp_code') or '').strip()
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if not mfa_token or not totp_code:
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return jsonify({'error': 'mfa_token and totp_code are required'}), 400
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try:
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payload = decode_token(mfa_token, expected_type='mfa', check_blacklist=True)
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except Exception:
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return jsonify({'error': 'Invalid or expired MFA token'}), 401
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user = db.session.get(User, int(payload['sub']))
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if not user or not user.totp_enabled:
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return jsonify({'error': 'MFA not configured for this account'}), 400
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import pyotp
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plaintext_secret = decrypt_totp_secret(user.totp_secret, user.totp_iv)
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if not pyotp.TOTP(plaintext_secret).verify(totp_code, valid_window=1):
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return jsonify({'error': 'Invalid verification code'}), 400
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# One-time use: blacklist the mfa_token
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blacklist_token(mfa_token, 'mfa')
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AuditLog.log(
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user_id=user.id,
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action='auth.mfa_verify',
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resource_type='user',
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resource_id=user.id,
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detail='MFA verification successful — session tokens issued',
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ip_address=_client_ip(),
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)
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db.session.commit()
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tokens = generate_tokens(user.id)
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return jsonify({
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'access_token': tokens['access_token'],
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'refresh_token': tokens['refresh_token'],
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}), 200
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@auth_bp.route('/mfa/status', methods=['GET'])
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@require_jwt
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def mfa_status():
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user = db.session.get(User, g.current_user_id)
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return jsonify({'totp_enabled': user.totp_enabled}), 200
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@auth_bp.route('/me', methods=['GET'])
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@require_jwt
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def me():
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"""Return basic profile info for the authenticated user."""
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user = db.session.get(User, g.current_user_id)
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return jsonify({
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'id': user.id,
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'email': user.email,
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'created_at': user.created_at.isoformat() if user.created_at else None,
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'last_login': user.last_login.isoformat() if user.last_login else None,
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'totp_enabled': user.totp_enabled,
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'recovery_configured': bool(user.recovery_enc_salt),
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}), 200
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# ── Account management ────────────────────────────────────────────────────────
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@auth_bp.route('/change-password', methods=['POST'])
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@require_jwt
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def change_password():
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"""
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Change master password — zero-knowledge atomic re-encryption.
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The client must:
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1. Derive current auth_hash and verify it locally against what it knows.
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2. Re-encrypt every vault item with the new vault key client-side.
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3. POST the new credentials + all re-encrypted item blobs in one request.
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The server verifies the current password, updates master_hash + enc_key_salt,
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and bulk-replaces all vault item ciphertexts atomically. If any step fails,
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the entire transaction is rolled back — the vault is never left in a split state.
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"""
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data = request.get_json(silent=True) or {}
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current_auth_hash = data.get('current_auth_hash', '')
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new_auth_hash = data.get('new_auth_hash', '')
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new_enc_key_salt = data.get('new_enc_key_salt', '')
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items = data.get('items', []) # [{id, enc_data, iv}, ...]
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if not current_auth_hash or not new_auth_hash or not new_enc_key_salt:
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return jsonify({'error': 'current_auth_hash, new_auth_hash, and new_enc_key_salt are required'}), 400
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user = db.session.get(User, g.current_user_id)
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if not verify_auth_token(current_auth_hash, user.master_hash):
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AuditLog.log(
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user_id=user.id,
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action='auth.change_password_failed',
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resource_type='user',
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resource_id=user.id,
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detail='Password change rejected — current password incorrect',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'error': 'Current password is incorrect'}), 401
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try:
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from app.models.vault_item import VaultItem
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# Bulk-update all vault item ciphertexts with new vault key encryption
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item_ids = [i.get('id') for i in items if i.get('id')]
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existing = {
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v.id: v
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for v in VaultItem.query.filter(
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VaultItem.user_id == user.id,
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VaultItem.id.in_(item_ids),
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).all()
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} if item_ids else {}
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for item_data in items:
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item_id = item_data.get('id')
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enc_data = item_data.get('enc_data', '')
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iv = item_data.get('iv', '')
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if not item_id or not enc_data or not iv:
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continue
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vault_item = existing.get(item_id)
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if vault_item:
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vault_item.enc_data = enc_data
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vault_item.iv = iv
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# Update credentials
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user.master_hash = hash_auth_token(new_auth_hash)
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user.enc_key_salt = new_enc_key_salt
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# Clear recovery data — it was encrypted with the old vault key and is now invalid
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user.recovery_enc_salt = None
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user.recovery_iv = None
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AuditLog.log(
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user_id=user.id,
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action='auth.change_password',
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resource_type='user',
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resource_id=user.id,
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detail=f'Master password changed; {len(existing)} vault item(s) re-encrypted; recovery code cleared',
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ip_address=_client_ip(),
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)
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db.session.commit()
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except Exception as e:
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db.session.rollback()
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return jsonify({'error': f'Password change failed: {str(e)}'}), 500
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return jsonify({'message': 'Password changed successfully. Please log in again.'}), 200
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@auth_bp.route('/account', methods=['DELETE'])
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@require_jwt
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def delete_account():
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"""
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Permanently delete the authenticated user's account and all associated data.
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Requires the current auth_hash for confirmation.
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Cascading deletes handle vault_items, folders, shared_items, emergency_access.
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"""
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data = request.get_json(silent=True) or {}
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auth_hash = data.get('auth_hash', '')
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if not auth_hash:
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return jsonify({'error': 'auth_hash is required for account deletion'}), 400
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user = db.session.get(User, g.current_user_id)
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if not verify_auth_token(auth_hash, user.master_hash):
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AuditLog.log(
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user_id=user.id,
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action='auth.delete_account_failed',
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resource_type='user',
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resource_id=user.id,
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detail='Account deletion rejected — password incorrect',
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ip_address=_client_ip(),
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)
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db.session.commit()
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return jsonify({'error': 'Incorrect password'}), 401
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user_id = user.id
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user_email = user.email
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try:
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# Log before delete (user row will be gone after commit)
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AuditLog.log(
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user_id=user_id,
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action='auth.delete_account',
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resource_type='user',
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resource_id=user_id,
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detail=f'Account permanently deleted: {user_email}',
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ip_address=_client_ip(),
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)
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db.session.delete(user)
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db.session.commit()
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except Exception as e:
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db.session.rollback()
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return jsonify({'error': f'Account deletion failed: {str(e)}'}), 500
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return jsonify({'message': 'Account deleted'}), 200
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# ── Account Recovery ──────────────────────────────────────────────────────────
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@auth_bp.route('/recovery/setup', methods=['POST'])
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@require_jwt
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def recovery_setup():
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"""
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Store a recovery-key-encrypted copy of enc_key_salt.
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The client generates a random 128-bit recovery code, derives a recovery key
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from it (PBKDF2), encrypts enc_key_salt with that key (AES-256-GCM), and
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sends the ciphertext + iv. The server stores these blobs — it never sees the
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recovery code or enc_key_salt plaintext.
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The recovery code is displayed to the user once and never stored server-side.
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"""
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data = request.get_json(silent=True) or {}
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recovery_enc_salt = data.get('recovery_enc_salt', '').strip()
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recovery_iv = data.get('recovery_iv', '').strip()
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if not recovery_enc_salt or not recovery_iv:
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return jsonify({'error': 'recovery_enc_salt and recovery_iv are required'}), 400
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user = db.session.get(User, g.current_user_id)
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user.recovery_enc_salt = recovery_enc_salt
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user.recovery_iv = recovery_iv
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AuditLog.log(
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user_id=user.id,
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action='auth.recovery_setup',
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resource_type='user',
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resource_id=user.id,
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detail='Account recovery code configured',
|
|
ip_address=_client_ip(),
|
|
)
|
|
db.session.commit()
|
|
|
|
return jsonify({'message': 'Recovery code saved'}), 200
|
|
|
|
|
|
@auth_bp.route('/recovery/status', methods=['GET'])
|
|
@require_jwt
|
|
def recovery_status():
|
|
"""Return whether the user has a recovery code configured."""
|
|
user = db.session.get(User, g.current_user_id)
|
|
return jsonify({'recovery_configured': bool(user.recovery_enc_salt)}), 200
|
|
|
|
|
|
@auth_bp.route('/recover', methods=['POST'])
|
|
@limiter.limit('5 per minute')
|
|
def recover_account():
|
|
"""
|
|
Recover account access using a recovery code.
|
|
|
|
Flow:
|
|
1. Client looks up enc_key_salt and recovery blobs by email.
|
|
2. Client decrypts enc_key_salt using the recovery key (derived from the recovery code).
|
|
3. Client derives new auth_hash and new vault key with a new master password.
|
|
4. Client re-encrypts all vault items with the new vault key.
|
|
5. Client POSTs everything here in one atomic payload.
|
|
|
|
This endpoint is unauthenticated — the recovery code is the credential.
|
|
"""
|
|
data = request.get_json(silent=True) or {}
|
|
email = (data.get('email') or '').strip().lower()
|
|
new_auth_hash = data.get('new_auth_hash', '')
|
|
new_enc_key_salt = data.get('new_enc_key_salt', '')
|
|
# Proof that the client successfully decrypted enc_key_salt:
|
|
# the client re-derives auth_hash from the *original* enc_key_salt path
|
|
# and sends it alongside the new credentials for server-side verification.
|
|
recovery_proof = data.get('recovery_proof', '')
|
|
items = data.get('items', [])
|
|
|
|
if not all([email, new_auth_hash, new_enc_key_salt, recovery_proof]):
|
|
return jsonify({'error': 'email, new_auth_hash, new_enc_key_salt, and recovery_proof are required'}), 400
|
|
|
|
time.sleep(0.1) # timing mitigation
|
|
|
|
user = User.query.filter_by(email=email).first()
|
|
if not user or not user.recovery_enc_salt:
|
|
return jsonify({'error': 'No recovery code found for this account'}), 404
|
|
|
|
# recovery_proof is the enc_key_salt re-encrypted by the client using the
|
|
# recovery key — we return it as a blob for the client to verify, then
|
|
# the client sends back the decrypted enc_key_salt as recovery_proof.
|
|
# Simpler: recovery_proof = HMAC or simply the decrypted enc_key_salt itself,
|
|
# which the client proves by sending it back plaintext. The server checks it
|
|
# matches user.enc_key_salt — if the recovery code was wrong, decryption
|
|
# would produce garbage that won't match.
|
|
if recovery_proof != user.enc_key_salt:
|
|
AuditLog.log(
|
|
user_id=user.id,
|
|
action='auth.recovery_failed',
|
|
resource_type='user',
|
|
resource_id=user.id,
|
|
detail='Recovery attempt failed — incorrect recovery code',
|
|
ip_address=_client_ip(),
|
|
)
|
|
db.session.commit()
|
|
return jsonify({'error': 'Invalid recovery code'}), 401
|
|
|
|
try:
|
|
from app.models.vault_item import VaultItem
|
|
|
|
item_ids = [i.get('id') for i in items if i.get('id')]
|
|
existing = {
|
|
v.id: v
|
|
for v in VaultItem.query.filter(
|
|
VaultItem.user_id == user.id,
|
|
VaultItem.id.in_(item_ids),
|
|
).all()
|
|
} if item_ids else {}
|
|
|
|
for item_data in items:
|
|
item_id = item_data.get('id')
|
|
enc_data = item_data.get('enc_data', '')
|
|
iv = item_data.get('iv', '')
|
|
if not item_id or not enc_data or not iv:
|
|
continue
|
|
vault_item = existing.get(item_id)
|
|
if vault_item:
|
|
vault_item.enc_data = enc_data
|
|
vault_item.iv = iv
|
|
|
|
user.master_hash = hash_auth_token(new_auth_hash)
|
|
user.enc_key_salt = new_enc_key_salt
|
|
# Recovery code is consumed — clear it so it cannot be reused
|
|
user.recovery_enc_salt = None
|
|
user.recovery_iv = None
|
|
|
|
AuditLog.log(
|
|
user_id=user.id,
|
|
action='auth.recovery_success',
|
|
resource_type='user',
|
|
resource_id=user.id,
|
|
detail=f'Account recovered; {len(existing)} vault item(s) re-encrypted; recovery code consumed',
|
|
ip_address=_client_ip(),
|
|
)
|
|
db.session.commit()
|
|
except Exception as e:
|
|
db.session.rollback()
|
|
return jsonify({'error': f'Recovery failed: {str(e)}'}), 500
|
|
|
|
tokens = generate_tokens(user.id)
|
|
return jsonify({
|
|
'message': 'Account recovered successfully',
|
|
'access_token': tokens['access_token'],
|
|
'refresh_token': tokens['refresh_token'],
|
|
'enc_key_salt': user.enc_key_salt,
|
|
}), 200
|
|
|
|
|
|
@auth_bp.route('/recovery/data', methods=['GET'])
|
|
@limiter.limit('10 per minute')
|
|
def recovery_data():
|
|
"""
|
|
Return the data the client needs to attempt recovery (unauthenticated).
|
|
Exposes only: enc_key_salt, recovery_enc_salt, recovery_iv.
|
|
Returns 404 if no recovery code is configured (prevents user enumeration
|
|
of which accounts have recovery set up — same response for unknown email).
|
|
"""
|
|
email = (request.args.get('email') or '').strip().lower()
|
|
if not email:
|
|
return jsonify({'error': 'email is required'}), 400
|
|
|
|
user = User.query.filter_by(email=email).first()
|
|
if not user or not user.recovery_enc_salt:
|
|
return jsonify({'error': 'No recovery data found'}), 404
|
|
|
|
return jsonify({
|
|
'enc_key_salt': user.enc_key_salt,
|
|
'recovery_enc_salt': user.recovery_enc_salt,
|
|
'recovery_iv': user.recovery_iv,
|
|
}), 200
|
|
|
|
|
|
@auth_bp.route('/recovery/items', methods=['GET'])
|
|
@limiter.limit('10 per minute')
|
|
def recovery_items():
|
|
"""
|
|
Return encrypted vault items for recovery re-encryption (unauthenticated).
|
|
|
|
Requires X-Recovery-Proof header containing the plaintext enc_key_salt.
|
|
The server verifies it matches user.enc_key_salt — proof that the client
|
|
correctly decrypted the recovery blob (i.e. has the correct recovery code).
|
|
|
|
Items are returned as encrypted ciphertext blobs only — no sensitive
|
|
plaintext is exposed. The client re-encrypts them locally.
|
|
"""
|
|
email = (request.args.get('email') or '').strip().lower()
|
|
recovery_proof = request.headers.get('X-Recovery-Proof', '').strip()
|
|
|
|
if not email or not recovery_proof:
|
|
return jsonify({'error': 'email and X-Recovery-Proof header are required'}), 400
|
|
|
|
user = User.query.filter_by(email=email).first()
|
|
if not user or not user.recovery_enc_salt:
|
|
return jsonify({'error': 'No recovery data found'}), 404
|
|
|
|
if recovery_proof != user.enc_key_salt:
|
|
AuditLog.log(
|
|
user_id=user.id,
|
|
action='auth.recovery_items_denied',
|
|
resource_type='user',
|
|
resource_id=user.id,
|
|
detail='Recovery items request denied — incorrect recovery proof',
|
|
ip_address=_client_ip(),
|
|
)
|
|
db.session.commit()
|
|
return jsonify({'error': 'Invalid recovery proof'}), 401
|
|
|
|
from app.models.vault_item import VaultItem
|
|
items = VaultItem.query.filter_by(user_id=user.id).all()
|
|
return jsonify({
|
|
'items': [
|
|
{'id': item.id, 'enc_data': item.enc_data, 'iv': item.iv}
|
|
for item in items
|
|
]
|
|
}), 200
|
|
|