Decrypt Huawei: Password Cipher

def decrypt_huawei_cipher(cipher_text):
    # Remove %^%# prefix and suffix
    if cipher_text.startswith('%^%#') and cipher_text.endswith('%^%'):
        cipher_text = cipher_text[4:-3]
key_stream = b'\x73\x4D\x3E\x12\xA9...'  # 256-byte fixed key
plaintext = []
for i, ch in enumerate(cipher_text.encode()):
    plaintext.append(ch ^ key_stream[i % len(key_stream)])
return bytes(plaintext).decode('ascii', errors='ignore')

However, the exact key differs slightly between:

Thus, generic decryption requires trying multiple known key streams. decrypt huawei password cipher

Since V200R005, Huawei adopted a salted hash approach for local user passwords stored in the config. However, note a crucial distinction:

Most people searching for "decrypt Huawei password cipher" actually need the reversible cipher used for:

For offline analysis (e.g., you have a backup config file but no device access), community tools exist. The most famous is huawei_cipher_decrypt.py. However , the exact key differs slightly between:

Step-by-step:

# Example using known Huawei V200R fixed key
from Crypto.Cipher import AES
import base64
def decrypt_huawei(cipher_text):
# Remove delimiters
enc = cipher_text.strip('%^%#')
# Decode from base64
enc_bytes = base64.b64decode(enc)
# Fixed key for V200R009-V200R019 (example)
key = b'\x00\x01\x02...' # Redacted for security
cipher = AES.new(key, AES.MODE_CBC, iv=b'\x00'*16)
return cipher.decrypt(enc_bytes).decode().rstrip('\x00')

Limitation: 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.

If the password is weak (e.g., "admin", "huawei", "123456"), the tool will find a match. If the password is complex and not in the dictionary, the cracking attempt will fail, proving the password policy is robust.

Tools like Hashcat or John the Ripper require the specific "Hash Mode" to function correctly. Thus, generic decryption requires trying multiple known key