SecureCRT（8.以上）配置的密码存放在***\Config\Sessions下面的ini文件中，内容如下：
S:“Username”=******
S:“Monitor Password V2”=
S:“Password V2”=02:*****************************
其中 Password V2 里面存放着密码，02:后面就是加密后的密码。可以通过一下Python脚本来解密。
运行 python SecureCRTCipher.py dec -v2 *****************************
一下脚本适用于python3及其以上（需要安装pycryptodome模块）：
#!/usr/bin/env python3import osfrom Crypto.Hashimport SHA256from Crypto.Cipherimport AES, BlowfishclassSecureCRTCrypto:def__init__(self):'''
Initialize SecureCRTCrypto object.
'''
self.IV=b'\x00'* Blowfish.block_size
self.Key1=b'\x24\xA6\x3D\xDE\x5B\xD3\xB3\x82\x9C\x7E\x06\xF4\x08\x16\xAA\x07'
self.Key2=b'\x5F\xB0\x45\xA2\x94\x17\xD9\x16\xC6\xC6\xA2\xFF\x06\x41\x82\xB7'defEncrypt(self, Plaintext:str):'''
Encrypt plaintext and return corresponding ciphertext.
Args:
Plaintext: A string that will be encrypted.
Returns:
Hexlified ciphertext string.
'''
plain_bytes= Plaintext.encode('utf-16-le')
plain_bytes+=b'\x00\x00'
padded_plain_bytes= plain_bytes+ os.urandom(Blowfish.block_size-len(plain_bytes)% Blowfish.block_size)
cipher1= Blowfish.new(self.Key1, Blowfish.MODE_CBC, iv= self.IV)
cipher2= Blowfish.new(self.Key2, Blowfish.MODE_CBC, iv= self.IV)return cipher1.encrypt(os.urandom(4)+ cipher2.encrypt(padded_plain_bytes)+ os.urandom(4)).hex()defDecrypt(self, Ciphertext:str):'''
Decrypt ciphertext and return corresponding plaintext.
Args:
Ciphertext: A hex string that will be decrypted.
Returns:
Plaintext string.
'''
cipher1= Blowfish.new(self.Key1, Blowfish.MODE_CBC, iv= self.IV)
cipher2= Blowfish.new(self.Key2, Blowfish.MODE_CBC, iv= self.IV)
ciphered_bytes=bytes.fromhex(Ciphertext)iflen(ciphered_bytes)<=8:raise ValueError('Invalid Ciphertext.')
padded_plain_bytes= cipher2.decrypt(cipher1.decrypt(ciphered_bytes)[4:-4])
i=0for iinrange(0,len(padded_plain_bytes),2):if padded_plain_bytes[i]==0and padded_plain_bytes[i+1]==0:break
plain_bytes= padded_plain_bytes[0:i]try:return plain_bytes.decode('utf-16-le')except UnicodeDecodeError:raise(ValueError('Invalid Ciphertext.'))classSecureCRTCryptoV2:def__init__(self, ConfigPassphrase:str=''):'''
Initialize SecureCRTCryptoV2 object.
Args:
ConfigPassphrase: The config passphrase that SecureCRT uses. Leave it empty if config passphrase is not set.
'''
self.IV=b'\x00'* AES.block_size
self.Key= SHA256.new(ConfigPassphrase.encode('utf-8')).digest()defEncrypt(self, Plaintext:str):'''
Encrypt plaintext and return corresponding ciphertext.
Args:
Plaintext: A string that will be encrypted.
Returns:
Hexlified ciphertext string.
'''
plain_bytes= Plaintext.encode('utf-8')iflen(plain_bytes)>0xffffffff:raise OverflowError('Plaintext is too long.')
plain_bytes= \len(plain_bytes).to_bytes(4,'little')+ \
plain_bytes+ \
SHA256.new(plain_bytes).digest()
padded_plain_bytes= \
plain_bytes+ \
os.urandom(AES.block_size-len(plain_bytes)% AES.block_size)
cipher= AES.new(self.Key, AES.MODE_CBC, iv= self.IV)return cipher.encrypt(padded_plain_bytes).hex()defDecrypt(self, Ciphertext:str):'''
Decrypt ciphertext and return corresponding plaintext.
Args:
Ciphertext: A hex string that will be decrypted.
Returns:
Plaintext string.
'''
cipher= AES.new(self.Key, AES.MODE_CBC, iv= self.IV)
padded_plain_bytes= cipher.decrypt(bytes.fromhex(Ciphertext))
plain_bytes_length=int.from_bytes(padded_plain_bytes[0:4],'little')
plain_bytes= padded_plain_bytes[4:4+ plain_bytes_length]iflen(plain_bytes)!= plain_bytes_length:raise ValueError('Invalid Ciphertext.')
plain_bytes_digest= padded_plain_bytes[4+ plain_bytes_length:4+ plain_bytes_length+ SHA256.digest_size]iflen(plain_bytes_digest)!= SHA256.digest_size:raise ValueError('Invalid Ciphertext.')if SHA256.new(plain_bytes).digest()!= plain_bytes_digest:raise ValueError('Invalid Ciphertext.')return plain_bytes.decode('utf-8')if __name__=='__main__':import sysdefHelp():print('Usage:')print(' SecureCRTCipher.py <enc|dec> [-v2] [-p ConfigPassphrase] <plaintext|ciphertext>')print('')print(' <enc|dec> "enc" for encryption, "dec" for decryption.')print(' This parameter must be specified.')print('')print(' [-v2] Encrypt/Decrypt with "Password V2" algorithm.')print(' This parameter is optional.')print('')print(' [-p ConfigPassphrase] The config passphrase that SecureCRT uses.')print(' This parameter is optional.')print('')print(' <plaintext|ciphertext> Plaintext string or ciphertext string.')print(' NOTICE: Ciphertext string must be a hex string.')print(' This parameter must be specified.')print('')defEncryptionRoutine(UseV2:bool, ConfigPassphrase:str, Plaintext:str):try:if UseV2:print(SecureCRTCryptoV2(ConfigPassphrase).Encrypt(Plaintext))else:print(SecureCRTCrypto().Encrypt(Plaintext))returnTrueexcept:print('Error: Failed to encrypt.')returnFalsedefDecryptionRoutine(UseV2:bool, ConfigPassphrase:str, Ciphertext:str):try:if UseV2:print(SecureCRTCryptoV2(ConfigPassphrase).Decrypt(Ciphertext))else:print(SecureCRTCrypto().Decrypt(Ciphertext))returnTrueexcept:print('Error: Failed to decrypt.')returnFalsedefMain(argc:int, argv:list):if3<= argcand argc<=6:
bUseV2=False
ConfigPassphrase=''if argv[1].lower()=='enc':
bEncrypt=Trueelif argv[1].lower()=='dec':
bEncrypt=Falseelse:
Help()return-1
i=2while i< argc-1:if argv[i].lower()=='-v2':
bUseV2=True
i+=1elif argv[i].lower()=='-p'and i+1< argc-1:
ConfigPassphrase= argv[i+1]
i+=2else:
Help()return-1if bUseV2==Falseandlen(ConfigPassphrase)!=0:print('Error: ConfigPassphrase is not supported if "-v2" is not specified')return-1if bEncrypt:return0if EncryptionRoutine(bUseV2, ConfigPassphrase, argv[-1])else-1else:return0if DecryptionRoutine(bUseV2, ConfigPassphrase, argv[-1])else-1else:
Help()
exit(Main(len(sys.argv), sys.argv))pip安装过程如果出现：ModuleNotFoundError: No module named ‘pip’
首先运行：python -m ensurepip
然后执行：python -m pip install --upgrade pip
参考：
http://www.361way.com/securecrt-password-ini/6345.html
http://www.361way.com/securecrt-decrypt/6335.html
https://github.com/HyperSine/how-does-SecureCRT-encrypt-password