99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
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#!/usr/bin/env python2.7
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import cgi
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import cgitb
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import pwd, sys, os, cdb, subprocess
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from subprocess import check_output, Popen, PIPE
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from os.path import expanduser
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cgitb.enable()
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home_dir = expanduser("~")
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def check_form(formvars, form):
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for varname in formvars:
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if varname not in form.keys():
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return False
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else:
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if type(form[varname].value) is not type(''):
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return None
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return True
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def read_template_file(filename, **vars):
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with open('tpl/' + filename, 'r') as f:
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template = f.read()
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for key in vars:
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template = template.replace('{$' + key + '}', vars[key])
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return template
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def check_oldpw(accountname, oldpass):
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passwd_dbfile = os.path.abspath(home_dir + "/passwd.cdb");
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try:
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db = cdb.init(passwd_dbfile)
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except:
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return 'No user database found.'
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try:
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cdb_user_data=db[accountname]
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except:
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return 'User not found or password incorrect.'
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passhash = cdb_user_data[6:40]
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# Hash algorithm is given between first two $ of passhash (here only md5 based BSD password is used)
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hashtype = '1'
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# Salt is given between next two $
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salt = passhash[3:11]
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opensslargs = ['openssl', 'passwd', '-' + hashtype, '-salt', salt, oldpass];
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newhash = check_output(opensslargs).strip();
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if newhash == passhash:
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return ''
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return 'User not found or password incorrect.'
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def generate_headers():
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return "Content-Type: text/html; charset=utf-8\n"
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def main():
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main_content = ''
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form = cgi.FieldStorage()
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if 'submit' in form.keys():
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formvars = ['accountname', 'oldpass', 'newpass', 'newpass2']
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form_ok = check_form(formvars, form)
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if form_ok == True:
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accountname = form['accountname'].value
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accountname = accountname.split("@")[0]
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oldpass = form['oldpass'].value
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newpass = form['newpass'].value
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newpass2 = form['newpass2'].value
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if newpass == newpass2:
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if check_oldpw(accountname, oldpass) == '':
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vpasswdargs = ['vpasswd', accountname]
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# Environmental variable HOME is needed for vpasswd to work
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os.environ['HOME'] = home_dir
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p = Popen(vpasswdargs, stdin=PIPE, stdout=PIPE, stderr=subprocess.STDOUT)
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p.stdin.write(newpass + '\n')
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p.stdin.write(newpass2 + '\n')
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p.stdin.close()
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if p.wait() == 0:
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# We did it
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main_content = read_template_file('success.tpl')
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else:
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main_content = read_template_file('fail.tpl', message=cgi.escape(p.stdout.read()))
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else:
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main_content = read_template_file('fail.tpl', message=cgi.escape( check_oldpw(accountname, oldpass)))
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else:
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main_content = read_template_file('fail.tpl', message='Passwords to not match.')
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elif form_ok == False:
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main_content = read_template_file('fail.tpl', message='All fields are required.')
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else:
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main_content = read_template_file('fail.tpl', message='Invalid data type supplied.')
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else:
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# Submit button not pressed, show form
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formaction = cgi.escape("https://" + os.environ["HTTP_HOST"] + os.environ["REQUEST_URI"])
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form = read_template_file('form.tpl', formaction=formaction)
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main_content = form
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response = generate_headers() + "\n"
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response += read_template_file('main.tpl', main_content=main_content)
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print(response)
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if __name__ == "__main__":
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main()
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