Mercurial > hgrepos > Python > apps > py-cutils

comparison cutils/genpwd.py @ 238:ff13b2a863ba

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Make selection from a character repertoire more evenly distributed
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 08 Feb 2025 08:54:02 +0100
parents d65a4d861dad
children 1eae57292c7c
comparison
equal deleted inserted replaced
237:d65a4d861dad 238:ff13b2a863ba
92 if not PY2: 92 if not PY2:
93 pwd = pwd.decode("ascii") 93 pwd = pwd.decode("ascii")
94 print(pwd) 94 print(pwd)
95 95
96 96
97 def gen_web(length, chars): 97 def gen_web(length, repertoire):
98 mult = 256//len(chars)
99 repertoire = chars * mult
100 assert len(repertoire) <= 256 98 assert len(repertoire) <= 256
101 pwd = [] 99 pwd = []
102 while len(pwd) < length: 100 while len(pwd) < length:
103 c = os.urandom(1) 101 rndbytes = os.urandom(16)
104 if PY2: 102 for c in rndbytes:
105 c = ord(c) 103 if PY2:
106 else: 104 c = ord(c)
107 c = c[0] 105 if c < len(repertoire):
108 if c < len(repertoire): 106 pwd.append(repertoire[c])
109 pwd.append(repertoire[c]) 107 if len(pwd) >= length:
108 break
110 if PY2: 109 if PY2:
111 pwd = b''.join(pwd) 110 pwd = b''.join(pwd)
112 else: 111 else:
113 pwd = bytes(pwd) 112 pwd = bytes(pwd)
114 return pwd 113 return pwd