mirror of https://github.com/jumpserver/jumpserver
269 lines
7.6 KiB
Python
269 lines
7.6 KiB
Python
import base64
|
||
import logging
|
||
from Cryptodome.Cipher import AES, PKCS1_v1_5
|
||
from Cryptodome.Util.Padding import pad
|
||
from Cryptodome.Random import get_random_bytes
|
||
from Cryptodome.PublicKey import RSA
|
||
from Cryptodome import Random
|
||
from gmssl.sm4 import CryptSM4, SM4_ENCRYPT, SM4_DECRYPT
|
||
|
||
from django.conf import settings
|
||
from django.core.exceptions import ImproperlyConfigured
|
||
|
||
|
||
def process_key(key):
|
||
"""
|
||
返回32 bytes 的key
|
||
"""
|
||
if not isinstance(key, bytes):
|
||
key = bytes(key, encoding='utf-8')
|
||
|
||
if len(key) >= 32:
|
||
return key[:32]
|
||
|
||
return pad(key, 32)
|
||
|
||
|
||
class BaseCrypto:
|
||
|
||
def encrypt(self, text):
|
||
return base64.urlsafe_b64encode(
|
||
self._encrypt(bytes(text, encoding='utf8'))
|
||
).decode('utf8')
|
||
|
||
def _encrypt(self, data: bytes) -> bytes:
|
||
raise NotImplementedError
|
||
|
||
def decrypt(self, text):
|
||
return self._decrypt(
|
||
base64.urlsafe_b64decode(bytes(text, encoding='utf8'))
|
||
).decode('utf8')
|
||
|
||
def _decrypt(self, data: bytes) -> bytes:
|
||
raise NotImplementedError
|
||
|
||
|
||
class GMSM4EcbCrypto(BaseCrypto):
|
||
def __init__(self, key):
|
||
self.key = process_key(key)
|
||
self.sm4_encryptor = CryptSM4()
|
||
self.sm4_encryptor.set_key(self.key, SM4_ENCRYPT)
|
||
|
||
self.sm4_decryptor = CryptSM4()
|
||
self.sm4_decryptor.set_key(self.key, SM4_DECRYPT)
|
||
|
||
def _encrypt(self, data: bytes) -> bytes:
|
||
return self.sm4_encryptor.crypt_ecb(data)
|
||
|
||
def _decrypt(self, data: bytes) -> bytes:
|
||
return self.sm4_decryptor.crypt_ecb(data)
|
||
|
||
|
||
class AESCrypto:
|
||
"""
|
||
AES
|
||
除了MODE_SIV模式key长度为：32, 48, or 64,
|
||
其余key长度为16, 24 or 32
|
||
详细见AES内部文档
|
||
CBC模式传入iv参数
|
||
本例使用常用的ECB模式
|
||
"""
|
||
|
||
def __init__(self, key):
|
||
if len(key) > 32:
|
||
key = key[:32]
|
||
self.key = self.to_16(key)
|
||
|
||
@staticmethod
|
||
def to_16(key):
|
||
"""
|
||
转为16倍数的bytes数据
|
||
:param key:
|
||
:return:
|
||
"""
|
||
key = bytes(key, encoding="utf8")
|
||
while len(key) % 16 != 0:
|
||
key += b'\0'
|
||
return key # 返回bytes
|
||
|
||
def aes(self):
|
||
return AES.new(self.key, AES.MODE_ECB) # 初始化加密器
|
||
|
||
def encrypt(self, text):
|
||
aes = self.aes()
|
||
cipher = base64.encodebytes(aes.encrypt(self.to_16(text)))
|
||
return str(cipher, encoding='utf8').replace('\n', '') # 加密
|
||
|
||
def decrypt(self, text):
|
||
aes = self.aes()
|
||
text_decoded = base64.decodebytes(bytes(text, encoding='utf8'))
|
||
return str(aes.decrypt(text_decoded).rstrip(b'\0').decode("utf8"))
|
||
|
||
|
||
class AESCryptoGCM:
|
||
"""
|
||
使用AES GCM模式
|
||
"""
|
||
|
||
def __init__(self, key):
|
||
self.key = process_key(key)
|
||
|
||
def encrypt(self, text):
|
||
"""
|
||
加密text，并将 header, nonce, tag (3*16 bytes, base64后变为 3*24 bytes)
|
||
附在密文前。解密时要用到。
|
||
"""
|
||
header = get_random_bytes(16)
|
||
cipher = AES.new(self.key, AES.MODE_GCM)
|
||
cipher.update(header)
|
||
ciphertext, tag = cipher.encrypt_and_digest(bytes(text, encoding='utf-8'))
|
||
|
||
result = []
|
||
for byte_data in (header, cipher.nonce, tag, ciphertext):
|
||
result.append(base64.b64encode(byte_data).decode('utf-8'))
|
||
|
||
return ''.join(result)
|
||
|
||
def decrypt(self, text):
|
||
"""
|
||
提取header, nonce, tag并解密text。
|
||
"""
|
||
metadata = text[:72]
|
||
header = base64.b64decode(metadata[:24])
|
||
nonce = base64.b64decode(metadata[24:48])
|
||
tag = base64.b64decode(metadata[48:])
|
||
ciphertext = base64.b64decode(text[72:])
|
||
|
||
cipher = AES.new(self.key, AES.MODE_GCM, nonce=nonce)
|
||
|
||
cipher.update(header)
|
||
plain_text_bytes = cipher.decrypt_and_verify(ciphertext, tag)
|
||
return plain_text_bytes.decode('utf-8')
|
||
|
||
|
||
def get_aes_crypto(key=None, mode='GCM'):
|
||
if key is None:
|
||
key = settings.SECRET_KEY
|
||
if mode == 'ECB':
|
||
a = AESCrypto(key)
|
||
elif mode == 'GCM':
|
||
a = AESCryptoGCM(key)
|
||
return a
|
||
|
||
|
||
def get_gm_sm4_ecb_crypto(key=None):
|
||
key = key or settings.SECRET_KEY
|
||
return GMSM4EcbCrypto(key)
|
||
|
||
|
||
aes_ecb_crypto = get_aes_crypto(mode='ECB')
|
||
aes_crypto = get_aes_crypto(mode='GCM')
|
||
gm_sm4_ecb_crypto = get_gm_sm4_ecb_crypto()
|
||
|
||
|
||
class Crypto:
|
||
cryptoes = {
|
||
'aes_ecb': aes_ecb_crypto,
|
||
'aes_gcm': aes_crypto,
|
||
'aes': aes_crypto,
|
||
'gm_sm4_ecb': gm_sm4_ecb_crypto,
|
||
'gm': gm_sm4_ecb_crypto,
|
||
}
|
||
|
||
def __init__(self):
|
||
cryptoes = self.__class__.cryptoes.copy()
|
||
crypto = cryptoes.pop(settings.SECURITY_DATA_CRYPTO_ALGO, None)
|
||
if crypto is None:
|
||
raise ImproperlyConfigured(
|
||
f'Crypto method not supported {settings.SECURITY_DATA_CRYPTO_ALGO}'
|
||
)
|
||
self.cryptoes = [crypto, *cryptoes.values()]
|
||
|
||
@property
|
||
def encryptor(self):
|
||
return self.cryptoes[0]
|
||
|
||
def encrypt(self, text):
|
||
return self.encryptor.encrypt(text)
|
||
|
||
def decrypt(self, text):
|
||
for decryptor in self.cryptoes:
|
||
try:
|
||
origin_text = decryptor.decrypt(text)
|
||
if origin_text:
|
||
# 有时不同算法解密不报错，但是返回空字符串
|
||
return origin_text
|
||
except (TypeError, ValueError, UnicodeDecodeError, IndexError):
|
||
continue
|
||
|
||
|
||
def gen_key_pair(length=1024):
|
||
""" 生成加密key
|
||
用于登录页面提交用户名/密码时，对密码进行加密（前端）/解密（后端）
|
||
"""
|
||
random_generator = Random.new().read
|
||
rsa = RSA.generate(length, random_generator)
|
||
rsa_private_key = rsa.exportKey().decode()
|
||
rsa_public_key = rsa.publickey().exportKey().decode()
|
||
return rsa_private_key, rsa_public_key
|
||
|
||
|
||
def rsa_encrypt(message, rsa_public_key):
|
||
""" 加密登录密码 """
|
||
key = RSA.importKey(rsa_public_key)
|
||
cipher = PKCS1_v1_5.new(key)
|
||
cipher_text = base64.b64encode(cipher.encrypt(message.encode())).decode()
|
||
return cipher_text
|
||
|
||
|
||
def rsa_decrypt(cipher_text, rsa_private_key=None):
|
||
""" 解密登录密码 """
|
||
if rsa_private_key is None:
|
||
# rsa_private_key 为 None，可以能是API请求认证，不需要解密
|
||
return cipher_text
|
||
|
||
key = RSA.importKey(rsa_private_key)
|
||
cipher = PKCS1_v1_5.new(key)
|
||
cipher_decoded = base64.b64decode(cipher_text.encode())
|
||
# Todo: 弄明白为何要以下这么写，https://xbuba.com/questions/57035263
|
||
if len(cipher_decoded) == 127:
|
||
hex_fixed = '00' + cipher_decoded.hex()
|
||
cipher_decoded = base64.b16decode(hex_fixed.upper())
|
||
message = cipher.decrypt(cipher_decoded, b'error').decode()
|
||
return message
|
||
|
||
|
||
def rsa_decrypt_by_session_pkey(value):
|
||
from jumpserver.utils import current_request
|
||
if not current_request:
|
||
return value
|
||
private_key_name = settings.SESSION_RSA_PRIVATE_KEY_NAME
|
||
private_key = current_request.session.get(private_key_name)
|
||
|
||
if not private_key or not value:
|
||
return value
|
||
|
||
try:
|
||
value = rsa_decrypt(value, private_key)
|
||
except Exception as e:
|
||
logging.error('Decrypt field error: {}'.format(e))
|
||
return value
|
||
|
||
|
||
def decrypt_password(value):
|
||
cipher = value.split(':')
|
||
if len(cipher) != 2:
|
||
return value
|
||
key_cipher, password_cipher = cipher
|
||
aes_key = rsa_decrypt_by_session_pkey(key_cipher)
|
||
aes = get_aes_crypto(aes_key, 'ECB')
|
||
try:
|
||
password = aes.decrypt(password_cipher)
|
||
except UnicodeDecodeError as e:
|
||
logging.error("Decrypt password error: {}, {}".format(password_cipher, e))
|
||
return value
|
||
return password
|
||
|
||
|
||
crypto = Crypto()
|