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79 lines
2 KiB
Python
Executable file
79 lines
2 KiB
Python
Executable file
#!/usr/bin/env python
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import argparse
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import getpass
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import sys
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import unicodedata
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import bcrypt
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import yaml
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bcrypt_rounds = 12
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password_pepper = ""
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def prompt_for_pass():
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password = getpass.getpass("Password: ")
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if not password:
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raise Exception("Password cannot be blank.")
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confirm_password = getpass.getpass("Confirm password: ")
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if password != confirm_password:
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raise Exception("Passwords do not match.")
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return password
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description=(
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"Calculate the hash of a new password, so that passwords can be reset"
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)
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)
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parser.add_argument(
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"-p",
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"--password",
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default=None,
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help="New password for user. Will prompt if omitted.",
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)
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parser.add_argument(
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"-c",
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"--config",
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type=argparse.FileType("r"),
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help=(
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"Path to server config file. "
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"Used to read in bcrypt_rounds and password_pepper."
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),
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)
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args = parser.parse_args()
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if "config" in args and args.config:
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config = yaml.safe_load(args.config)
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bcrypt_rounds = config.get("bcrypt_rounds", bcrypt_rounds)
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password_config = config.get("password_config", None) or {}
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password_pepper = password_config.get("pepper", password_pepper)
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password = args.password
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if not password:
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password = prompt_for_pass()
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# On Python 2, make sure we decode it to Unicode before we normalise it
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if isinstance(password, bytes):
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try:
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password = password.decode(sys.stdin.encoding)
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except UnicodeDecodeError:
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print(
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"ERROR! Your password is not decodable using your terminal encoding (%s)."
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% (sys.stdin.encoding,)
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)
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pw = unicodedata.normalize("NFKC", password)
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hashed = bcrypt.hashpw(
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pw.encode("utf8") + password_pepper.encode("utf8"),
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bcrypt.gensalt(bcrypt_rounds),
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).decode("ascii")
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print(hashed)
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