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key_manager.py
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key_manager.py
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import json
import os
import logging
from Crypto.PublicKey import RSA, ECC
logger = logging.getLogger(__name__)
class KeyManager:
def __init__(self):
self.keys = {}
self.key_file = 'keys.json'
self.load_keys()
logger.debug(f"Loaded keys: {self.keys}")
def generate_key(self, key_type):
try:
if key_type == 'RSA':
key = RSA.generate(2048)
elif key_type == 'ECC':
key = ECC.generate(curve='P-256')
else:
raise ValueError(f"Unsupported key type: {key_type}")
key_id = f"{key_type}_{len(self.keys)}"
self.keys[key_id] = {
'type': key_type,
'private_key': key.export_key(format='PEM').decode('utf-8') if isinstance(key.export_key(format='PEM'), bytes) else key.export_key(format='PEM'),
'public_key': key.public_key().export_key(format='PEM').decode('utf-8') if isinstance(key.public_key().export_key(format='PEM'), bytes) else key.public_key().export_key(format='PEM')
}
self.save_keys()
logger.info(f"Generated new {key_type} key with ID: {key_id}")
return key_id
except Exception as e:
logger.error(f"Error generating {key_type} key: {str(e)}")
raise
def get_key(self, key_id):
try:
key_data = self.keys.get(key_id)
if not key_data:
raise ValueError(f"Key not found: {key_id}")
if key_data['type'] == 'RSA':
return RSA.import_key(key_data['private_key'])
elif key_data['type'] == 'ECC':
return ECC.import_key(key_data['private_key'])
except Exception as e:
logger.error(f"Error retrieving key {key_id}: {str(e)}")
raise
def get_public_key(self, key_id):
try:
key_data = self.keys.get(key_id)
if not key_data:
raise ValueError(f"Key not found: {key_id}")
if key_data['type'] == 'RSA':
return RSA.import_key(key_data['public_key'])
elif key_data['type'] == 'ECC':
return ECC.import_key(key_data['public_key'])
except Exception as e:
logger.error(f"Error retrieving public key for {key_id}: {str(e)}")
raise
def load_keys(self):
try:
if os.path.exists(self.key_file):
with open(self.key_file, 'r') as f:
content = f.read().strip()
if content:
self.keys = json.loads(content)
else:
self.keys = {}
else:
self.keys = {}
logger.info("Keys loaded successfully")
except Exception as e:
logger.error(f"Error loading keys: {str(e)}")
self.keys = {}
def save_keys(self):
try:
with open(self.key_file, 'w') as f:
json.dump(self.keys, f, indent=2)
logger.info("Keys saved successfully")
except Exception as e:
logger.error(f"Error saving keys: {str(e)}")
raise
def list_keys(self):
return list(self.keys.keys())
def remove_key(self, key_id):
try:
if key_id in self.keys:
del self.keys[key_id]
self.save_keys()
logger.info(f"Key {key_id} removed successfully")
else:
logger.warning(f"Key {key_id} not found for removal")
except Exception as e:
logger.error(f"Error removing key {key_id}: {str(e)}")
raise
def clear_keys(self):
try:
self.keys = {}
self.save_keys()
logger.info("All keys cleared successfully")
except Exception as e:
logger.error(f"Error clearing keys: {str(e)}")
raise