A pass phrase generator for Oracle database passwords

passphrase-gen.py

import os
import random
import re
import string

## OCI Console:
##  Password must be 9 to 30 characters and contain at least 2 uppercase, 2 lowercase, 2 special, and 2 numeric characters.
##  The special characters must be _, #, or -.

MAX_LENGTH = 30

# Load the word list
# https://github.com/first20hours/google-10000-english
CWD = os.path.dirname(os.path.realpath(__file__))
with open(os.path.join(CWD, "google-10000-english.txt")) as f:
    words = [line.strip() for line in f]

# Filter the word list
words = [word for word in words if 1 <= len(word) <= 15]


def generate_password():
    # Generate a passphrase of 3 words
    passphrase = [random.choice(words) for _ in range(3)]

    # Capitalize the first letter of each word
    passphrase = [
        re.sub(r"\b\w", lambda match: match.group().upper(), word)
        for word in passphrase
    ]

    # Generate 3 random numbers
    numbers = "".join(random.choice(string.digits) for _ in range(3))

    # Generate 2 random uppercase letters
    letters = "".join(random.choice(string.ascii_uppercase) for _ in range(2))

    # Append numbers and letters to the passphrase if they are not present
    if not any(char.isdigit() for word in passphrase for char in word):
        passphrase.append(numbers)
    if not any(char.isupper() for word in passphrase for char in word):
        passphrase.append(letters)

    # Join the words with a random character
    passphrase = "".join(word + random.choice("_#-") for word in passphrase)[:-1]

    # If the length of the passphrase exceeds MAX_LENGTH, generate a new password
    if len(passphrase) > MAX_LENGTH:
        return generate_password()

    return passphrase


print(generate_password())