def set_passwd(username, admin_passwd, passwd_data, shadow_data):
"""set the password for username to admin_passwd
The passwd_file is not modified. The shadow_file is updated.
if the username is not found in both files, an exception is raised.
:param username: the username
:param encrypted_passwd: the encrypted password
:param passwd_file: path to the passwd file
:param shadow_file: path to the shadow password file
:returns: nothing
:raises: exception.WormholeException(), IOError()
"""
# encryption algo - id pairs for crypt()
algos = {'SHA-512': '$6$', 'SHA-256': '$5$', 'MD5': '$1$', 'DES': ''}
salt = _generate_salt()
# crypt() depends on the underlying libc, and may not support all
# forms of hash. We try md5 first. If we get only 13 characters back,
# then the underlying crypt() didn't understand the '$n$salt' magic,
# so we fall back to DES.
# md5 is the default because it's widely supported. Although the
# local crypt() might support stronger SHA, the target instance
# might not.
encrypted_passwd = crypt.crypt(admin_passwd, algos['MD5'] + salt)
if len(encrypted_passwd) == 13:
encrypted_passwd = crypt.crypt(admin_passwd, algos['DES'] + salt)
p_file = passwd_data.split("\n")
s_file = shadow_data.split("\n")
# username MUST exist in passwd file or it's an error
for entry in p_file:
split_entry = entry.split(':')
if split_entry[0] == username:
break
else:
msg = _('User %(username)s not found in password file.')
raise exception.WormholeException(msg % username)
# update password in the shadow file.It's an error if the
# the user doesn't exist.
new_shadow = list()
found = False
for entry in s_file:
split_entry = entry.split(':')
if split_entry[0] == username:
split_entry[1] = encrypted_passwd
found = True
new_entry = ':'.join(split_entry)
new_shadow.append(new_entry)
if not found:
msg = _('User %(username)s not found in shadow file.')
raise exception.WormholeException(msg % username)
return "\n".join(new_shadow)
def unplug(self, instance, vif):
vif_type = vif['type']
LOG.debug('vif_type=%(vif_type)s instance=%(instance)s '
'vif=%(vif)s', {
'vif_type': vif_type,
'instance': instance,
'vif': vif
})
if vif_type is None:
raise exception.WormholeException(
_("Vif_type parameter must be present "
"for this vif_driver implementation"))
self.unplug_ovs_hybrid(instance, vif)