Mercurial > hgrepos > Python > apps > py-cutils

annotate cutils/genpwd.py @ 230:ccbb6905914e

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Change copyright and note genpwd in the READNE and make an official script
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 07 Feb 2025 12:58:55 +0100
parents 788f14425503
children 6d8443878a00
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4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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1 # -*- coding: utf-8 -*-
230
ccbb6905914e Change copyright and note genpwd in the READNE and make an official script
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2 # :-
ccbb6905914e Change copyright and note genpwd in the READNE and make an official script
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3 # :Copyright: (c) 2018 Franz Glasner
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4 # :Copyright: (c) 2025 Franz Glasner
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5 # :License: BSD-3-Clause
ccbb6905914e Change copyright and note genpwd in the READNE and make an official script
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6 # :-
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4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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7 r"""Generate passwords.
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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8
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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9 Usage: genpwd.py [ Options ] required_length
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10
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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11 Options:
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12
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13 --type, -t web, web-safe, web-safe2, base64, base32, ascii85
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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14
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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15 :Author: Franz Glasner
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16
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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17 """
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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18
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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19 from __future__ import (division, absolute_import, print_function)
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20
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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21 import getopt
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22 import sys
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23 import os
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24 import base64
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25
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26 from . import (__version__, __revision__)
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27
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4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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28
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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29 WEB_CHARS = b"ABCDEFGHIJKLMNOPQRSTUVWYXZabcdefghijklmnopqrstuvwxyz0123456789.,-_;!()[]{}*"
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30 WEB_SAFE_CHARS = b"ABCDEFGHJKLMNPQRSTUVWYXZabcdefghijkmnopqrstuvwxyz23456789.,-_;!"
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31 WEB_SAFE2_CHARS = b".,-_;!" + WEB_SAFE_CHARS
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32
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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33 PY2 = sys.version_info[0] <= 2
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34
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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35
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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36 def main():
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37 opt_type = "web-safe2"
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38 opts, args = getopt.getopt(sys.argv[1:],
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39 "t:",
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40 ["type="])
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41 for opt, val in opts:
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42 if opt in ("-t", "--type"):
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43 if val not in ("web", "web-safe", "web-safe2",
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44 "base64", "base32", "ascii85", ):
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45 raise getopt.GetoptError("invalid type: %s" % val, "")
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46 opt_type = val
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47 else:
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48 raise RuntimeError("inconsistent getopt handling")
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49
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50 try:
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51 req_length = int(args[0], 10)
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52 except IndexError:
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53 raise getopt.GetoptError("no length given")
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54
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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55 if opt_type == "web":
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56 pwd = gen_web(req_length, WEB_CHARS)
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57 elif opt_type == "web-safe":
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58 pwd = gen_web(req_length, WEB_SAFE_CHARS)
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59 elif opt_type == "web-safe2":
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60 pwd = gen_web(req_length, WEB_SAFE2_CHARS)
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61 elif opt_type == "base64":
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62 encoder = base64.b64encode
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63 pwd = gen_bin(req_length, encoder)
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64 elif opt_type == "base32":
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65 encoder = base64.b32encode
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66 pwd = gen_bin(req_length, encoder)
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67 elif opt_type == "ascii85":
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68 encoder = base64.a85encode
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69 pwd = gen_bin(req_length, encoder)
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70 else:
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71 raise NotImplementedError("type not yet implemented: %s" % opt_type)
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72 print(pwd)
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73
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74
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75 def gen_web(length, chars):
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76 mult = 256//len(chars)
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77 repertoire = chars * mult
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78 assert len(repertoire) <= 256
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79 pwd = []
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80 while len(pwd) < length:
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81 c = os.urandom(1)
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82 if PY2:
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83 c = ord(c)
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84 else:
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85 c = c[0]
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86 if c < len(repertoire):
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87 pwd.append(repertoire[c])
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88 if PY2:
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89 pwd = b''.join(pwd)
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90 else:
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91 pwd = bytes(pwd)
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92 return pwd
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93
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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94
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95 def gen_bin(length, encoder):
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96 pwd = encoder(os.urandom(length))
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97 return pwd[:length]
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98
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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99
4bb2d0975cfe imports: import genpwd,py from fmgbackup4.
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100 if __name__ == "__main__":
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101 main()