From 818ac2e096ecf14f11f4adb9de0155e3e2f8a93f Mon Sep 17 00:00:00 2001
From: Scott Moser <smoser@ubuntu.com>
Date: Fri, 28 Jan 2011 19:28:51 +0000
Subject: add setting of passwords.

---
 cloudinit/CloudConfig/cc_set_passwords.py | 124 ++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 cloudinit/CloudConfig/cc_set_passwords.py

(limited to 'cloudinit/CloudConfig')

diff --git a/cloudinit/CloudConfig/cc_set_passwords.py b/cloudinit/CloudConfig/cc_set_passwords.py
new file mode 100644
index 00000000..92f0aac7
--- /dev/null
+++ b/cloudinit/CloudConfig/cc_set_passwords.py
@@ -0,0 +1,124 @@
+# vi: ts=4 expandtab
+#
+#    Copyright (C) 2009-2010 Canonical Ltd.
+#
+#    Author: Scott Moser <scott.moser@canonical.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License version 3, as
+#    published by the Free Software Foundation.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+import cloudinit.util as util
+import subprocess
+import sys
+import random
+import string
+
+def handle(name,cfg,cloud,log,args):
+    if len(args) != 0:
+        # if run from command line, and give args, wipe the chpasswd['list']
+        password = args[0]
+        if 'chpasswd' in cfg and 'list' in cfg['chpasswd']:
+            del cfg['chpasswd']['list']
+    else:
+        password = util.get_cfg_option_str(cfg,"password",None)
+
+    expire = True
+    pw_auth = "no"
+    change_pwauth = False
+    plist = None
+
+    if 'chpasswd' in cfg:
+        chfg = cfg['chpasswd']
+        plist = util.get_cfg_option_str(chfg,'list',plist)
+        expire = util.get_cfg_option_bool(chfg,'expire', expire)
+
+    if not plist and password:
+        user = util.get_cfg_option_str(cfg,"user","ubuntu")
+        plist = "%s:%s" % (user, password)
+
+    errors = []
+    if plist:
+        plist_in = []
+        randlist = []
+        users = []
+        for line in plist.splitlines():
+            u,p = line.split(':',1)
+            if p == "R" or p == "RANDOM":
+                p = rand_user_password()
+                randlist.append("%s:%s" % (u,p))
+            plist_in.append("%s:%s" % (u,p))
+            users.append(u)
+        
+        ch_in = '\n'.join(plist_in)
+        try:
+            util.subp(['chpasswd'], ch_in)
+            log.debug("changed password for %s:" % users)
+        except Exception as e:
+            errors.append(e)
+            log.warn("failed to set passwords with chpasswd: %s" % e)
+
+        if len(randlist):
+            sys.stdout.write("%s\n%s\n" % ("Set the following passwords\n",
+                '\n'.join(randlist) ))
+
+        if expire:
+            enum=len(errors)
+            for u in users:
+                try:
+                    util.subp(['passwd', '--expire', u])
+                except Exception as e:
+                    errors.append(e)
+                    log.warn("failed to expire account for %s" % u )
+            if enum == len(errors):
+                log.debug("expired passwords for: %s" % u)
+
+    if 'ssh_pwauth' in cfg:
+        val = str(cfg['ssh_pwauth']).lower()
+        if val in ( "true", "1", "yes"):
+            pw_auth="yes"
+            change_pwauth=True
+        elif val in ( "false", "0", "no"):
+            pw_auth="no"
+            change_pwauth=True
+        else:
+            change_pwauth=False
+            
+    if change_pwauth:
+        pa_s = "\(#*\)\(PasswordAuthentication[[:space:]]\+\)\(yes\|no\)"
+        msg = "set PasswordAuthentication to '%s'" % pw_auth
+        try:
+            cmd = [ 'sed', '-i', 's,%s,\\2%s,' % (pa_s, pw_auth),
+                    '/etc/ssh/sshd_config' ]
+            util.subp(cmd)
+            log.debug(msg)
+        except Exception as e:
+            log.warn("failed %s" % msg)
+            errors.append(e)
+
+        try:
+            p = util.subp(['service', 'ssh', 'restart'])
+            log.debug("restarted sshd")
+        except:
+            log.warn("restart of ssh failed")
+
+    if len(errors):
+        raise(errors[0])
+
+    return
+
+def rand_str(strlen=32, select_from=string.letters+string.digits):
+    return("".join([random.choice(select_from) for x in range(0, strlen)]))
+
+def rand_user_password(pwlen=9):
+    selfrom=(string.letters.translate(None,'loLOI') +
+             string.digits.translate(None,'01'))
+    return(rand_str(pwlen,select_from=selfrom))
+
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