gpmidi
5 May 2026

Thanks to Pierre Barre there is now an updated version of the script from this post for decrypting the gui logins! Now with Python 3 support! (Yes, I'm old, I used Python 2 for the version version ;)

import base64
import sys

def decrypt(ep_b64, pk_b64):
    ep = base64.b64decode(ep_b64).decode('utf-8')
    pk = base64.b64decode(pk_b64).decode('utf-8')
    
    res = []
    ln = 0
    maxlen = 0
    offset = 0

    for i in range(len(ep)):
        if i == 0:
            maxlen = ord(ep[i]) - ord(pk[i])
        elif i == 1:
            offset = ord(ep[i]) - ord(pk[i])
        elif i >= offset and ln < maxlen:
            res.append(chr(ord(ep[i]) - ord(pk[i])))
            ln += 1

    return ''.join(res)


def decrypt_base64(encrypted_b64: str, key_b64: str) -> str:
    return decrypt(encrypted_b64, key_b64)


if __name__ == "__main__":
    if len(sys.argv) != 3:
        print(f"Usage: {sys.argv[0]} <encrypted_password_b64> <key_b64>")
        sys.exit(1)

    encrypted_password_b64 = sys.argv[1]
    parent_key_b64 = sys.argv[2]

    try:
        decrypted = decrypt_base64(encrypted_password_b64, parent_key_b64)
        print(decrypted)
    except Exception as e:
        print(f"Error: {e}")
        sys.exit(2)

 

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