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community.general/plugins/modules/database/postgresql/postgresql_user.py
Andrew Klychkov f62b8027e0
postgresql modules: fix examples to use FQCN (#643)
2020-07-13 12:54:34 +03:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
module: postgresql_user
short_description: Add or remove a user (role) from a PostgreSQL server instance
description:
- Adds or removes a user (role) from a PostgreSQL server instance
("cluster" in PostgreSQL terminology) and, optionally,
grants the user access to an existing database or tables.
- A user is a role with login privilege.
- The fundamental function of the module is to create, or delete, users from
a PostgreSQL instances. Privilege assignment, or removal, is an optional
step, which works on one database at a time. This allows for the module to
be called several times in the same module to modify the permissions on
different databases, or to grant permissions to already existing users.
- A user cannot be removed until all the privileges have been stripped from
the user. In such situation, if the module tries to remove the user it
will fail. To avoid this from happening the fail_on_user option signals
the module to try to remove the user, but if not possible keep going; the
module will report if changes happened and separately if the user was
removed or not.
options:
name:
description:
- Name of the user (role) to add or remove.
type: str
required: true
aliases:
- user
password:
description:
- Set the user's password, before 1.4 this was required.
- Password can be passed unhashed or hashed (MD5-hashed).
- Unhashed password will automatically be hashed when saved into the
database if C(encrypted) parameter is set, otherwise it will be save in
plain text format.
- When passing an MD5-hashed password it must be generated with the format
C('str["md5"] + md5[ password + username ]'), resulting in a total of
35 characters. An easy way to do this is C(echo "md5$(echo -n
'verysecretpasswordJOE' | md5sum | awk '{print $1}')").
- Note that if the provided password string is already in MD5-hashed
format, then it is used as-is, regardless of C(encrypted) parameter.
type: str
db:
description:
- Name of database to connect to and where user's permissions will be granted.
type: str
aliases:
- login_db
fail_on_user:
description:
- If C(yes), fail when user (role) can't be removed. Otherwise just log and continue.
default: 'yes'
type: bool
aliases:
- fail_on_role
priv:
description:
- "Slash-separated PostgreSQL privileges string: C(priv1/priv2), where
privileges can be defined for database ( allowed options - 'CREATE',
'CONNECT', 'TEMPORARY', 'TEMP', 'ALL'. For example C(CONNECT) ) or
for table ( allowed options - 'SELECT', 'INSERT', 'UPDATE', 'DELETE',
'TRUNCATE', 'REFERENCES', 'TRIGGER', 'ALL'. For example
C(table:SELECT) ). Mixed example of this string:
C(CONNECT/CREATE/table1:SELECT/table2:INSERT)."
type: str
role_attr_flags:
description:
- "PostgreSQL user attributes string in the format: CREATEDB,CREATEROLE,SUPERUSER."
- Note that '[NO]CREATEUSER' is deprecated.
- To create a simple role for using it like a group, use C(NOLOGIN) flag.
type: str
choices: [ '[NO]SUPERUSER', '[NO]CREATEROLE', '[NO]CREATEDB',
'[NO]INHERIT', '[NO]LOGIN', '[NO]REPLICATION', '[NO]BYPASSRLS' ]
session_role:
description:
- Switch to session_role after connecting.
- The specified session_role must be a role that the current login_user is a member of.
- Permissions checking for SQL commands is carried out as though the session_role were the one that had logged in originally.
type: str
state:
description:
- The user (role) state.
type: str
default: present
choices: [ absent, present ]
encrypted:
description:
- Whether the password is stored hashed in the database.
- Passwords can be passed already hashed or unhashed, and postgresql
ensures the stored password is hashed when C(encrypted) is set.
- "Note: Postgresql 10 and newer doesn't support unhashed passwords."
- Previous to Ansible 2.6, this was C(no) by default.
default: 'yes'
type: bool
expires:
description:
- The date at which the user's password is to expire.
- If set to C('infinity'), user's password never expire.
- Note that this value should be a valid SQL date and time type.
type: str
no_password_changes:
description:
- If C(yes), don't inspect database for password changes. Effective when
C(pg_authid) is not accessible (such as AWS RDS). Otherwise, make
password changes as necessary.
default: 'no'
type: bool
conn_limit:
description:
- Specifies the user (role) connection limit.
type: int
ssl_mode:
description:
- Determines whether or with what priority a secure SSL TCP/IP connection will be negotiated with the server.
- See U(https://www.postgresql.org/docs/current/static/libpq-ssl.html) for more information on the modes.
- Default of C(prefer) matches libpq default.
type: str
default: prefer
choices: [ allow, disable, prefer, require, verify-ca, verify-full ]
ca_cert:
description:
- Specifies the name of a file containing SSL certificate authority (CA) certificate(s).
- If the file exists, the server's certificate will be verified to be signed by one of these authorities.
type: str
aliases: [ ssl_rootcert ]
groups:
description:
- The list of groups (roles) that need to be granted to the user.
type: list
elements: str
comment:
description:
- Add a comment on the user (equal to the COMMENT ON ROLE statement result).
type: str
version_added: '0.2.0'
trust_input:
description:
- If C(no), check whether values of parameters I(name), I(password), I(privs), I(expires),
I(role_attr_flags), I(groups), I(comment), I(session_role) are potentially dangerous.
- It makes sense to use C(yes) only when SQL injections via the parameters are possible.
type: bool
default: yes
version_added: '0.2.0'
notes:
- The module creates a user (role) with login privilege by default.
Use NOLOGIN role_attr_flags to change this behaviour.
- If you specify PUBLIC as the user (role), then the privilege changes will apply to all users (roles).
You may not specify password or role_attr_flags when the PUBLIC user is specified.
- SCRAM-SHA-256-hashed passwords (SASL Authentication) require PostgreSQL version 10 or newer.
On the previous versions the whole hashed string will be used as a password.
seealso:
- module: community.general.postgresql_privs
- module: community.general.postgresql_membership
- module: community.general.postgresql_owner
- name: PostgreSQL database roles
description: Complete reference of the PostgreSQL database roles documentation.
link: https://www.postgresql.org/docs/current/user-manag.html
- name: PostgreSQL SASL Authentication
description: Complete reference of the PostgreSQL SASL Authentication.
link: https://www.postgresql.org/docs/current/sasl-authentication.html
author:
- Ansible Core Team
extends_documentation_fragment:
- community.general.postgres
'''
EXAMPLES = r'''
- name: Connect to acme database, create django user, and grant access to database and products table
community.general.postgresql_user:
db: acme
name: django
password: ceec4eif7ya
priv: "CONNECT/products:ALL"
expires: "Jan 31 2020"
- name: Add a comment on django user
community.general.postgresql_user:
db: acme
name: django
comment: This is a test user
# Connect to default database, create rails user, set its password (MD5-hashed),
# and grant privilege to create other databases and demote rails from super user status if user exists
- name: Create rails user, set MD5-hashed password, grant privs
community.general.postgresql_user:
name: rails
password: md59543f1d82624df2b31672ec0f7050460
role_attr_flags: CREATEDB,NOSUPERUSER
- name: Connect to acme database and remove test user privileges from there
community.general.postgresql_user:
db: acme
name: test
priv: "ALL/products:ALL"
state: absent
fail_on_user: no
- name: Connect to test database, remove test user from cluster
community.general.postgresql_user:
db: test
name: test
priv: ALL
state: absent
- name: Connect to acme database and set user's password with no expire date
community.general.postgresql_user:
db: acme
name: django
password: mysupersecretword
priv: "CONNECT/products:ALL"
expires: infinity
# Example privileges string format
# INSERT,UPDATE/table:SELECT/anothertable:ALL
- name: Connect to test database and remove an existing user's password
community.general.postgresql_user:
db: test
user: test
password: ""
- name: Create user test and grant group user_ro and user_rw to it
community.general.postgresql_user:
name: test
groups:
- user_ro
- user_rw
# Create user with a cleartext password if it does not exist or update its password.
# The password will be encrypted with SCRAM algorithm (available since PostgreSQL 10)
- name: Create appclient user with SCRAM-hashed password
community.general.postgresql_user:
name: appclient
password: "secret123"
environment:
PGOPTIONS: "-c password_encryption=scram-sha-256"
'''
RETURN = r'''
queries:
description: List of executed queries.
returned: always
type: list
sample: ['CREATE USER "alice"', 'GRANT CONNECT ON DATABASE "acme" TO "alice"']
'''
import itertools
import re
import traceback
from hashlib import md5, sha256
import hmac
from base64 import b64decode
try:
import psycopg2
from psycopg2.extras import DictCursor
except ImportError:
# psycopg2 is checked by connect_to_db()
# from ansible.module_utils.postgres
pass
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.community.general.plugins.module_utils.database import (
pg_quote_identifier,
SQLParseError,
check_input,
)
from ansible_collections.community.general.plugins.module_utils.postgres import (
connect_to_db,
get_conn_params,
PgMembership,
postgres_common_argument_spec,
)
from ansible.module_utils._text import to_bytes, to_native, to_text
from ansible.module_utils.six import iteritems
import ansible_collections.community.general.plugins.module_utils.saslprep as saslprep
try:
# pbkdf2_hmac is missing on python 2.6, we can safely assume,
# that postresql 10 capable instance have at least python 2.7 installed
from hashlib import pbkdf2_hmac
pbkdf2_found = True
except ImportError:
pbkdf2_found = False
FLAGS = ('SUPERUSER', 'CREATEROLE', 'CREATEDB', 'INHERIT', 'LOGIN', 'REPLICATION')
FLAGS_BY_VERSION = {'BYPASSRLS': 90500}
SCRAM_SHA256_REGEX = r'^SCRAM-SHA-256\$(\d+):([A-Za-z0-9+\/=]+)\$([A-Za-z0-9+\/=]+):([A-Za-z0-9+\/=]+)$'
VALID_PRIVS = dict(table=frozenset(('SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER', 'ALL')),
database=frozenset(
('CREATE', 'CONNECT', 'TEMPORARY', 'TEMP', 'ALL')),
)
# map to cope with idiosyncracies of SUPERUSER and LOGIN
PRIV_TO_AUTHID_COLUMN = dict(SUPERUSER='rolsuper', CREATEROLE='rolcreaterole',
CREATEDB='rolcreatedb', INHERIT='rolinherit', LOGIN='rolcanlogin',
REPLICATION='rolreplication', BYPASSRLS='rolbypassrls')
executed_queries = []
class InvalidFlagsError(Exception):
pass
class InvalidPrivsError(Exception):
pass
# ===========================================
# PostgreSQL module specific support methods.
#
def user_exists(cursor, user):
# The PUBLIC user is a special case that is always there
if user == 'PUBLIC':
return True
query = "SELECT rolname FROM pg_roles WHERE rolname=%(user)s"
cursor.execute(query, {'user': user})
return cursor.rowcount > 0
def user_add(cursor, user, password, role_attr_flags, encrypted, expires, conn_limit):
"""Create a new database user (role)."""
# Note: role_attr_flags escaped by parse_role_attrs and encrypted is a
# literal
query_password_data = dict(password=password, expires=expires)
query = ['CREATE USER "%(user)s"' %
{"user": user}]
if password is not None and password != '':
query.append("WITH %(crypt)s" % {"crypt": encrypted})
query.append("PASSWORD %(password)s")
if expires is not None:
query.append("VALID UNTIL %(expires)s")
if conn_limit is not None:
query.append("CONNECTION LIMIT %(conn_limit)s" % {"conn_limit": conn_limit})
query.append(role_attr_flags)
query = ' '.join(query)
executed_queries.append(query)
cursor.execute(query, query_password_data)
return True
def user_should_we_change_password(current_role_attrs, user, password, encrypted):
"""Check if we should change the user's password.
Compare the proposed password with the existing one, comparing
hashes if encrypted. If we can't access it assume yes.
"""
if current_role_attrs is None:
# on some databases, E.g. AWS RDS instances, there is no access to
# the pg_authid relation to check the pre-existing password, so we
# just assume password is different
return True
# Do we actually need to do anything?
pwchanging = False
if password is not None:
# Empty password means that the role shouldn't have a password, which
# means we need to check if the current password is None.
if password == '':
if current_role_attrs['rolpassword'] is not None:
pwchanging = True
# SCRAM hashes are represented as a special object, containing hash data:
# `SCRAM-SHA-256$<iteration count>:<salt>$<StoredKey>:<ServerKey>`
# for reference, see https://www.postgresql.org/docs/current/catalog-pg-authid.html
elif current_role_attrs['rolpassword'] is not None \
and pbkdf2_found \
and re.match(SCRAM_SHA256_REGEX, current_role_attrs['rolpassword']):
r = re.match(SCRAM_SHA256_REGEX, current_role_attrs['rolpassword'])
try:
# extract SCRAM params from rolpassword
it = int(r.group(1))
salt = b64decode(r.group(2))
server_key = b64decode(r.group(4))
# we'll never need `storedKey` as it is only used for server auth in SCRAM
# storedKey = b64decode(r.group(3))
# from RFC5802 https://tools.ietf.org/html/rfc5802#section-3
# SaltedPassword := Hi(Normalize(password), salt, i)
# ServerKey := HMAC(SaltedPassword, "Server Key")
normalized_password = saslprep.saslprep(to_text(password))
salted_password = pbkdf2_hmac('sha256', to_bytes(normalized_password), salt, it)
server_key_verifier = hmac.new(salted_password, digestmod=sha256)
server_key_verifier.update(b'Server Key')
if server_key_verifier.digest() != server_key:
pwchanging = True
except Exception:
# We assume the password is not scram encrypted
# or we cannot check it properly, e.g. due to missing dependencies
pwchanging = True
# 32: MD5 hashes are represented as a sequence of 32 hexadecimal digits
# 3: The size of the 'md5' prefix
# When the provided password looks like a MD5-hash, value of
# 'encrypted' is ignored.
elif (password.startswith('md5') and len(password) == 32 + 3) or encrypted == 'UNENCRYPTED':
if password != current_role_attrs['rolpassword']:
pwchanging = True
elif encrypted == 'ENCRYPTED':
hashed_password = 'md5{0}'.format(md5(to_bytes(password) + to_bytes(user)).hexdigest())
if hashed_password != current_role_attrs['rolpassword']:
pwchanging = True
return pwchanging
def user_alter(db_connection, module, user, password, role_attr_flags, encrypted, expires, no_password_changes, conn_limit):
"""Change user password and/or attributes. Return True if changed, False otherwise."""
changed = False
cursor = db_connection.cursor(cursor_factory=DictCursor)
# Note: role_attr_flags escaped by parse_role_attrs and encrypted is a
# literal
if user == 'PUBLIC':
if password is not None:
module.fail_json(msg="cannot change the password for PUBLIC user")
elif role_attr_flags != '':
module.fail_json(msg="cannot change the role_attr_flags for PUBLIC user")
else:
return False
# Handle passwords.
if not no_password_changes and (password is not None or role_attr_flags != '' or expires is not None or conn_limit is not None):
# Select password and all flag-like columns in order to verify changes.
try:
select = "SELECT * FROM pg_authid where rolname=%(user)s"
cursor.execute(select, {"user": user})
# Grab current role attributes.
current_role_attrs = cursor.fetchone()
except psycopg2.ProgrammingError:
current_role_attrs = None
db_connection.rollback()
pwchanging = user_should_we_change_password(current_role_attrs, user, password, encrypted)
if current_role_attrs is None:
try:
# AWS RDS instances does not allow user to access pg_authid
# so try to get current_role_attrs from pg_roles tables
select = "SELECT * FROM pg_roles where rolname=%(user)s"
cursor.execute(select, {"user": user})
# Grab current role attributes from pg_roles
current_role_attrs = cursor.fetchone()
except psycopg2.ProgrammingError as e:
db_connection.rollback()
module.fail_json(msg="Failed to get role details for current user %s: %s" % (user, e))
role_attr_flags_changing = False
if role_attr_flags:
role_attr_flags_dict = {}
for r in role_attr_flags.split(' '):
if r.startswith('NO'):
role_attr_flags_dict[r.replace('NO', '', 1)] = False
else:
role_attr_flags_dict[r] = True
for role_attr_name, role_attr_value in role_attr_flags_dict.items():
if current_role_attrs[PRIV_TO_AUTHID_COLUMN[role_attr_name]] != role_attr_value:
role_attr_flags_changing = True
if expires is not None:
cursor.execute("SELECT %s::timestamptz;", (expires,))
expires_with_tz = cursor.fetchone()[0]
expires_changing = expires_with_tz != current_role_attrs.get('rolvaliduntil')
else:
expires_changing = False
conn_limit_changing = (conn_limit is not None and conn_limit != current_role_attrs['rolconnlimit'])
if not pwchanging and not role_attr_flags_changing and not expires_changing and not conn_limit_changing:
return False
alter = ['ALTER USER "%(user)s"' % {"user": user}]
if pwchanging:
if password != '':
alter.append("WITH %(crypt)s" % {"crypt": encrypted})
alter.append("PASSWORD %(password)s")
else:
alter.append("WITH PASSWORD NULL")
alter.append(role_attr_flags)
elif role_attr_flags:
alter.append('WITH %s' % role_attr_flags)
if expires is not None:
alter.append("VALID UNTIL %(expires)s")
if conn_limit is not None:
alter.append("CONNECTION LIMIT %(conn_limit)s" % {"conn_limit": conn_limit})
query_password_data = dict(password=password, expires=expires)
try:
cursor.execute(' '.join(alter), query_password_data)
changed = True
except psycopg2.InternalError as e:
if e.pgcode == '25006':
# Handle errors due to read-only transactions indicated by pgcode 25006
# ERROR: cannot execute ALTER ROLE in a read-only transaction
changed = False
module.fail_json(msg=e.pgerror, exception=traceback.format_exc())
return changed
else:
raise psycopg2.InternalError(e)
except psycopg2.NotSupportedError as e:
module.fail_json(msg=e.pgerror, exception=traceback.format_exc())
elif no_password_changes and role_attr_flags != '':
# Grab role information from pg_roles instead of pg_authid
select = "SELECT * FROM pg_roles where rolname=%(user)s"
cursor.execute(select, {"user": user})
# Grab current role attributes.
current_role_attrs = cursor.fetchone()
role_attr_flags_changing = False
if role_attr_flags:
role_attr_flags_dict = {}
for r in role_attr_flags.split(' '):
if r.startswith('NO'):
role_attr_flags_dict[r.replace('NO', '', 1)] = False
else:
role_attr_flags_dict[r] = True
for role_attr_name, role_attr_value in role_attr_flags_dict.items():
if current_role_attrs[PRIV_TO_AUTHID_COLUMN[role_attr_name]] != role_attr_value:
role_attr_flags_changing = True
if not role_attr_flags_changing:
return False
alter = ['ALTER USER "%(user)s"' %
{"user": user}]
if role_attr_flags:
alter.append('WITH %s' % role_attr_flags)
try:
cursor.execute(' '.join(alter))
except psycopg2.InternalError as e:
if e.pgcode == '25006':
# Handle errors due to read-only transactions indicated by pgcode 25006
# ERROR: cannot execute ALTER ROLE in a read-only transaction
changed = False
module.fail_json(msg=e.pgerror, exception=traceback.format_exc())
return changed
else:
raise psycopg2.InternalError(e)
# Grab new role attributes.
cursor.execute(select, {"user": user})
new_role_attrs = cursor.fetchone()
# Detect any differences between current_ and new_role_attrs.
changed = current_role_attrs != new_role_attrs
return changed
def user_delete(cursor, user):
"""Try to remove a user. Returns True if successful otherwise False"""
cursor.execute("SAVEPOINT ansible_pgsql_user_delete")
try:
query = 'DROP USER "%s"' % user
executed_queries.append(query)
cursor.execute(query)
except Exception:
cursor.execute("ROLLBACK TO SAVEPOINT ansible_pgsql_user_delete")
cursor.execute("RELEASE SAVEPOINT ansible_pgsql_user_delete")
return False
cursor.execute("RELEASE SAVEPOINT ansible_pgsql_user_delete")
return True
def has_table_privileges(cursor, user, table, privs):
"""
Return the difference between the privileges that a user already has and
the privileges that they desire to have.
:returns: tuple of:
* privileges that they have and were requested
* privileges they currently hold but were not requested
* privileges requested that they do not hold
"""
cur_privs = get_table_privileges(cursor, user, table)
have_currently = cur_privs.intersection(privs)
other_current = cur_privs.difference(privs)
desired = privs.difference(cur_privs)
return (have_currently, other_current, desired)
def get_table_privileges(cursor, user, table):
if '.' in table:
schema, table = table.split('.', 1)
else:
schema = 'public'
query = ("SELECT privilege_type FROM information_schema.role_table_grants "
"WHERE grantee=%(user)s AND table_name=%(table)s AND table_schema=%(schema)s")
cursor.execute(query, {'user': user, 'table': table, 'schema': schema})
return frozenset([x[0] for x in cursor.fetchall()])
def grant_table_privileges(cursor, user, table, privs):
# Note: priv escaped by parse_privs
privs = ', '.join(privs)
query = 'GRANT %s ON TABLE %s TO "%s"' % (
privs, pg_quote_identifier(table, 'table'), user)
executed_queries.append(query)
cursor.execute(query)
def revoke_table_privileges(cursor, user, table, privs):
# Note: priv escaped by parse_privs
privs = ', '.join(privs)
query = 'REVOKE %s ON TABLE %s FROM "%s"' % (
privs, pg_quote_identifier(table, 'table'), user)
executed_queries.append(query)
cursor.execute(query)
def get_database_privileges(cursor, user, db):
priv_map = {
'C': 'CREATE',
'T': 'TEMPORARY',
'c': 'CONNECT',
}
query = 'SELECT datacl FROM pg_database WHERE datname = %s'
cursor.execute(query, (db,))
datacl = cursor.fetchone()[0]
if datacl is None:
return set()
r = re.search(r'%s\\?"?=(C?T?c?)/[^,]+,?' % user, datacl)
if r is None:
return set()
o = set()
for v in r.group(1):
o.add(priv_map[v])
return normalize_privileges(o, 'database')
def has_database_privileges(cursor, user, db, privs):
"""
Return the difference between the privileges that a user already has and
the privileges that they desire to have.
:returns: tuple of:
* privileges that they have and were requested
* privileges they currently hold but were not requested
* privileges requested that they do not hold
"""
cur_privs = get_database_privileges(cursor, user, db)
have_currently = cur_privs.intersection(privs)
other_current = cur_privs.difference(privs)
desired = privs.difference(cur_privs)
return (have_currently, other_current, desired)
def grant_database_privileges(cursor, user, db, privs):
# Note: priv escaped by parse_privs
privs = ', '.join(privs)
if user == "PUBLIC":
query = 'GRANT %s ON DATABASE %s TO PUBLIC' % (
privs, pg_quote_identifier(db, 'database'))
else:
query = 'GRANT %s ON DATABASE %s TO "%s"' % (
privs, pg_quote_identifier(db, 'database'), user)
executed_queries.append(query)
cursor.execute(query)
def revoke_database_privileges(cursor, user, db, privs):
# Note: priv escaped by parse_privs
privs = ', '.join(privs)
if user == "PUBLIC":
query = 'REVOKE %s ON DATABASE %s FROM PUBLIC' % (
privs, pg_quote_identifier(db, 'database'))
else:
query = 'REVOKE %s ON DATABASE %s FROM "%s"' % (
privs, pg_quote_identifier(db, 'database'), user)
executed_queries.append(query)
cursor.execute(query)
def revoke_privileges(cursor, user, privs):
if privs is None:
return False
revoke_funcs = dict(table=revoke_table_privileges,
database=revoke_database_privileges)
check_funcs = dict(table=has_table_privileges,
database=has_database_privileges)
changed = False
for type_ in privs:
for name, privileges in iteritems(privs[type_]):
# Check that any of the privileges requested to be removed are
# currently granted to the user
differences = check_funcs[type_](cursor, user, name, privileges)
if differences[0]:
revoke_funcs[type_](cursor, user, name, privileges)
changed = True
return changed
def grant_privileges(cursor, user, privs):
if privs is None:
return False
grant_funcs = dict(table=grant_table_privileges,
database=grant_database_privileges)
check_funcs = dict(table=has_table_privileges,
database=has_database_privileges)
changed = False
for type_ in privs:
for name, privileges in iteritems(privs[type_]):
# Check that any of the privileges requested for the user are
# currently missing
differences = check_funcs[type_](cursor, user, name, privileges)
if differences[2]:
grant_funcs[type_](cursor, user, name, privileges)
changed = True
return changed
def parse_role_attrs(cursor, role_attr_flags):
"""
Parse role attributes string for user creation.
Format:
attributes[,attributes,...]
Where:
attributes := CREATEDB,CREATEROLE,NOSUPERUSER,...
[ "[NO]SUPERUSER","[NO]CREATEROLE", "[NO]CREATEDB",
"[NO]INHERIT", "[NO]LOGIN", "[NO]REPLICATION",
"[NO]BYPASSRLS" ]
Note: "[NO]BYPASSRLS" role attribute introduced in 9.5
Note: "[NO]CREATEUSER" role attribute is deprecated.
"""
flags = frozenset(role.upper() for role in role_attr_flags.split(',') if role)
valid_flags = frozenset(itertools.chain(FLAGS, get_valid_flags_by_version(cursor)))
valid_flags = frozenset(itertools.chain(valid_flags, ('NO%s' % flag for flag in valid_flags)))
if not flags.issubset(valid_flags):
raise InvalidFlagsError('Invalid role_attr_flags specified: %s' %
' '.join(flags.difference(valid_flags)))
return ' '.join(flags)
def normalize_privileges(privs, type_):
new_privs = set(privs)
if 'ALL' in new_privs:
new_privs.update(VALID_PRIVS[type_])
new_privs.remove('ALL')
if 'TEMP' in new_privs:
new_privs.add('TEMPORARY')
new_privs.remove('TEMP')
return new_privs
def parse_privs(privs, db):
"""
Parse privilege string to determine permissions for database db.
Format:
privileges[/privileges/...]
Where:
privileges := DATABASE_PRIVILEGES[,DATABASE_PRIVILEGES,...] |
TABLE_NAME:TABLE_PRIVILEGES[,TABLE_PRIVILEGES,...]
"""
if privs is None:
return privs
o_privs = {
'database': {},
'table': {}
}
for token in privs.split('/'):
if ':' not in token:
type_ = 'database'
name = db
priv_set = frozenset(x.strip().upper()
for x in token.split(',') if x.strip())
else:
type_ = 'table'
name, privileges = token.split(':', 1)
priv_set = frozenset(x.strip().upper()
for x in privileges.split(',') if x.strip())
if not priv_set.issubset(VALID_PRIVS[type_]):
raise InvalidPrivsError('Invalid privs specified for %s: %s' %
(type_, ' '.join(priv_set.difference(VALID_PRIVS[type_]))))
priv_set = normalize_privileges(priv_set, type_)
o_privs[type_][name] = priv_set
return o_privs
def get_valid_flags_by_version(cursor):
"""
Some role attributes were introduced after certain versions. We want to
compile a list of valid flags against the current Postgres version.
"""
current_version = cursor.connection.server_version
return [
flag
for flag, version_introduced in FLAGS_BY_VERSION.items()
if current_version >= version_introduced
]
def get_comment(cursor, user):
"""Get user's comment."""
query = ("SELECT pg_catalog.shobj_description(r.oid, 'pg_authid') "
"FROM pg_catalog.pg_roles r "
"WHERE r.rolname = %(user)s")
cursor.execute(query, {'user': user})
return cursor.fetchone()[0]
def add_comment(cursor, user, comment):
"""Add comment on user."""
if comment != get_comment(cursor, user):
query = 'COMMENT ON ROLE "%s" IS ' % user
cursor.execute(query + '%(comment)s', {'comment': comment})
executed_queries.append(cursor.mogrify(query + '%(comment)s', {'comment': comment}))
return True
else:
return False
# ===========================================
# Module execution.
#
def main():
argument_spec = postgres_common_argument_spec()
argument_spec.update(
user=dict(type='str', required=True, aliases=['name']),
password=dict(type='str', default=None, no_log=True),
state=dict(type='str', default='present', choices=['absent', 'present']),
priv=dict(type='str', default=None),
db=dict(type='str', default='', aliases=['login_db']),
fail_on_user=dict(type='bool', default=True, aliases=['fail_on_role']),
role_attr_flags=dict(type='str', default=''),
encrypted=dict(type='bool', default=True),
no_password_changes=dict(type='bool', default=False, no_log=False),
expires=dict(type='str', default=None),
conn_limit=dict(type='int', default=None),
session_role=dict(type='str'),
groups=dict(type='list', elements='str'),
comment=dict(type='str', default=None),
trust_input=dict(type='bool', default=True),
)
module = AnsibleModule(
argument_spec=argument_spec,
supports_check_mode=True
)
user = module.params["user"]
password = module.params["password"]
state = module.params["state"]
fail_on_user = module.params["fail_on_user"]
if module.params['db'] == '' and module.params["priv"] is not None:
module.fail_json(msg="privileges require a database to be specified")
privs = parse_privs(module.params["priv"], module.params["db"])
no_password_changes = module.params["no_password_changes"]
if module.params["encrypted"]:
encrypted = "ENCRYPTED"
else:
encrypted = "UNENCRYPTED"
expires = module.params["expires"]
conn_limit = module.params["conn_limit"]
role_attr_flags = module.params["role_attr_flags"]
groups = module.params["groups"]
if groups:
groups = [e.strip() for e in groups]
comment = module.params["comment"]
session_role = module.params['session_role']
trust_input = module.params['trust_input']
if not trust_input:
# Check input for potentially dangerous elements:
check_input(module, user, password, privs, expires,
role_attr_flags, groups, comment, session_role)
conn_params = get_conn_params(module, module.params, warn_db_default=False)
db_connection = connect_to_db(module, conn_params)
cursor = db_connection.cursor(cursor_factory=DictCursor)
try:
role_attr_flags = parse_role_attrs(cursor, role_attr_flags)
except InvalidFlagsError as e:
module.fail_json(msg=to_native(e), exception=traceback.format_exc())
kw = dict(user=user)
changed = False
user_removed = False
if state == "present":
if user_exists(cursor, user):
try:
changed = user_alter(db_connection, module, user, password,
role_attr_flags, encrypted, expires, no_password_changes, conn_limit)
except SQLParseError as e:
module.fail_json(msg=to_native(e), exception=traceback.format_exc())
else:
try:
changed = user_add(cursor, user, password,
role_attr_flags, encrypted, expires, conn_limit)
except psycopg2.ProgrammingError as e:
module.fail_json(msg="Unable to add user with given requirement "
"due to : %s" % to_native(e),
exception=traceback.format_exc())
except SQLParseError as e:
module.fail_json(msg=to_native(e), exception=traceback.format_exc())
try:
changed = grant_privileges(cursor, user, privs) or changed
except SQLParseError as e:
module.fail_json(msg=to_native(e), exception=traceback.format_exc())
if groups:
target_roles = []
target_roles.append(user)
pg_membership = PgMembership(module, cursor, groups, target_roles)
changed = pg_membership.grant() or changed
executed_queries.extend(pg_membership.executed_queries)
if comment is not None:
try:
changed = add_comment(cursor, user, comment) or changed
except Exception as e:
module.fail_json(msg='Unable to add comment on role: %s' % to_native(e),
exception=traceback.format_exc())
else:
if user_exists(cursor, user):
if module.check_mode:
changed = True
kw['user_removed'] = True
else:
try:
changed = revoke_privileges(cursor, user, privs)
user_removed = user_delete(cursor, user)
except SQLParseError as e:
module.fail_json(msg=to_native(e), exception=traceback.format_exc())
changed = changed or user_removed
if fail_on_user and not user_removed:
msg = "Unable to remove user"
module.fail_json(msg=msg)
kw['user_removed'] = user_removed
if changed:
if module.check_mode:
db_connection.rollback()
else:
db_connection.commit()
kw['changed'] = changed
kw['queries'] = executed_queries
module.exit_json(**kw)
if __name__ == '__main__':
main()
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