Older firmware often used DES encryption with a hardcoded, known key for configuration strings.
In the context of network devices (routers and firewalls), Huawei utilizes several "cipher" formats for storing passwords in configuration files. Depending on the device type and age, these can often be reversed: Common Huawei Cipher Types & Decryption Methods Simple DES-based Ciphers decrypt huawei password cipher
The fixed key changes across firmware versions. Without the exact key, decryption fails. Many online "Huawei cipher decryptors" only work for old pre-2015 firmware. Older firmware often used DES encryption with a
if == ' main ': print(decrypt(sys.argv[1])) decrypt huawei password cipher