Auth_db Module

This module contains all authentication related functions that need the access to the database. This module should be used together with auth module, it cannot be used independently because it depends on the module. Select this module if you want to use database to store authentication information like subscriber usernames and passwords. If you want to use radius authentication, then use auth_radius instead.

1.1.1. RFC 8760 Support (Strenghtened Authentication)

Starting with OpenSIPS 3.2, the auth, auth_db and uac_auth modules include support for two new digest authentication algorithms ("SHA-256" and "SHA-512-256"), according to the RFC 8760 specs.

1.2. Dependencies

1.2.1. OpenSIPS Modules

The module depends on the following modules (in the other words the listed modules must be loaded before this module):

auth -- Generic authentication functions
database -- Any database module (currently mysql, postgres, dbtext)

1.2.2. External Libraries or Applications

The following libraries or applications must be installed before running OpenSIPS with this module loaded:

none

1.3. Exported Parameters

1.3.1. `db_url` (string)

This is URL of the database to be used. Value of the parameter depends on the database module used. For example for mysql and postgres modules this is something like mysql://username:password@host:port/database. For dbtext module (which stores data in plaintext files) it is directory in which the database resides.

Default value is “mysql://opensipsro:opensipsro@localhost/opensips”.

Example 1.1. db_url parameter usage

modparam("auth_db", "db_url", "dbdriver://username:password@dbhost/dbname")

1.3.2. `calculate_ha1` (integer)

This parameter tells the server whether it should considered the loaded password (for authentification) as plaintext passwords or a pre-calculated HA1 string.

Possible meanings of this parameter are:

1 (calculate HA1) - the loaded password is a plaintext password, so OpenSIPS will internally calculate the HA1. As the passwords will be loaded from the column specified in the password_column parameter, be sure this parameter points to a column holding a plaintext password (by default, this parameter points to the “ha1” column);
0 (do not calculate HA1) - the loaded password is a pre-computed HA1 hash (no calculation needed). The module will load all hashes stored in the password_column, hash_column_sha256 and hash_column_sha512t256 columns, then use the hash corresponding to the hashing algorithm selected for a given digest authentication challenge.
The content of the hash columns can be generated as follows:
- password_column: MD5(username:realm:password)
- hash_column_sha256: SHA-256(username:realm:password)
- hash_column_sha512t256: SHA-512-256(username:realm:password)

Default value of this parameter is 0 (use hashed passwords).

Example 1.2. calculate_ha1 parameter usage

modparam("auth_db", "calculate_ha1", 1)

1.3.3. `use_domain` (integer)

If true (not 0), domain will be also used when looking up in the subscriber table. If you have a multi-domain setup, it is strongly recommended to turn on this parameter to avoid username overlapping between domains.

IMPORTANT: before turning on this parameter, be sure that the domain column in subscriber table is properly populated.

Default value is “0 (false)”.

Example 1.3. use_domain parameter usage

modparam("auth_db", "use_domain", 1)

1.3.4. `load_credentials` (string)

This parameter specifies credentials to be fetched from database when the authentication is performed. The loaded credentials will be stored in AVPs. If the AVP name is not specificaly given, it will be used a NAME AVP with the same name as the column name.

Parameter syntax:

load_credentials = credential (';' credential)*
credential = (avp_specification '=' column_name) | (column_name)
avp_specification = '$avp(' + NAME + ')'

Default value of this parameter is “rpid”.

Example 1.4. load_credentials parameter usage

# load rpid column into $avp(13) and email_address column
# into $avp(email_address)
modparam("auth_db", "load_credentials", "$avp(13)=rpid;email_address")

1.3.5. `skip_version_check` (int)

This parameter specifies not to check the auth table version. This parameter should be set when a custom authentication table is used.

Default value is “0 (false)”.

Example 1.5. skip_version_check parameter usage

modparam("auth_db", "skip_version_check", 1)

1.3.6. `user_column` (string)

This is the name of the column in a 'SUBSCRIBER' like table holding the usernames. Default value is fine for most people. Use the parameter if you really need to change it.

Default value is “username”.

Example 1.6. user_column parameter usage

modparam("auth_db", "user_column", "user")

1.3.7. `domain_column` (string)

This is the name of the column in a 'SUBSCRIBER' like table holding the domains of users. Default value is fine for most people. Use the parameter if you really need to change it.

Default value is “domain”.

Example 1.7. domain_column parameter usage

modparam("auth_db", "domain_column", "domain")

1.3.8. `password_column` (string)

This is the name of the column in a "subscriber" like table holding MD5 HA1 hash strings or plaintext passwords. An MD5 HA1 hash is an MD5 hash of username, password and realm. Storing hashes in the DB (as opposed to passwords directly) is much more secure, because the server does not need to know plaintext passwords and because it is computationally infeasible for an attacker to reverse-obtain a password from an HA1 string.

Default value is “ha1”.

Example 1.8. password_column parameter usage

modparam("auth_db", "password_column", "password")

1.3.9. `hash_column_sha256` (string)

The name of the column holding SHA-256 HA1 hashes (RFC 8760 support).

Default value is “ha1_sha256”.

Example 1.9. password_column parameter usage

modparam("auth_db", "hash_column_sha256", "ha1_sha256")

1.3.10. `hash_column_sha512t256` (string)

The name of the column holding SHA-512/256 HA1 hashes. (RFC 8760 support).

Default value is “ha1_sha512t256”.

Example 1.10. password_column parameter usage

modparam("auth_db", "hash_column_sha512t256", "ha1_sha512t256")

1.3.11. `uri_user_column` (string)

Column holding usernames in an 'URI' like table.

Default value is “username”.

Example 1.11. Set uri_user_column parameter

...
modparam("auth_db", "uri_user_column", "username")
...

1.3.12. `uri_domain_column` (string)

Column holding domain in an 'URI' like table.

Default value is “domain”.

Example 1.12. Set uri_domain_column parameter

...
modparam("auth_db", "uri_domain_column", "domain")
...

1.3.13. `uri_uriuser_column` (string)

Column holding URI username in an 'URI' like table.

Default value is “uri_user”.

Example 1.13. Set uriuser_column parameter

...
modparam("auth_db", "uri_uriuser_column", "uri_user")
...

1.4. Exported Functions

1.4.1. `www_authorize(realm, table)`

The function verifies the received credentials against a "SUBSCRIBER"-like table according to digest authentication as per RFC2617. If the credentials are verified successfully then the function will succeed and mark the credentials as authorized (marked credentials can be later used by some other functions). If the function was unable to verify the credentials for some reason then it will fail and the script should call www_challenge which will challenge the user again.

Negative codes may be interpreted as follows:

-5 (generic error) - some generic error occurred and no reply was sent out;
-4 (no credentials) - credentials were not found in request;
-3 (stale nonce) - stale nonce;
-2 (invalid password) - valid user, but wrong password;
-1 (invalid user) - authentication user does not exist.

Meaning of the parameters is as follows:

realm (string) - Realm is an opaque string that the user agent should present to the user so it can decide what username and password to use. Usually this is domain of the host the server is running on.
If an empty string “” is used then the server will generate it from the request. In case of REGISTER requests To header field domain will be used (because this header field represents a user being registered), for all other messages From header field domain will be used.
The string may contain pseudo variables.
table (string) - Table to be used to lookup usernames and passwords (usually subscribers table).

This function can be used from REQUEST_ROUTE.

Example 1.14. www_authorize usage

...
if (!www_authorize("siphub.net", "subscriber"))
	www_challenge("siphub.net", "auth");
...

1.4.2. `proxy_authorize(realm, table)`

The function verifies the received credentials against a "SUBSCRIBER"-like table according to digest authentication as per RFC2617. If the credentials are verified successfully then the function will succeed and mark the credentials as authorized (marked credentials can be later used by some other functions). If the function was unable to verify the credentials for some reason then it will fail and the script should call proxy_challenge which will challenge the user again.

Negative codes may be interpreted as follows:

-5 (generic error) - some generic error occurred and no reply was sent out;
-4 (no credentials) - credentials were not found in request;
-3 (stale nonce) - stale nonce;
-2 (invalid password) - valid user, but wrong password;
-1 (invalid user) - authentication user does not exist.

Meaning of the parameters is as follows:

realm (string) - Realm is an opaque string that the user agent should present to the user so it can decide what username and password to use. Usually this is domain of the host the server is running on.
If an empty string “” is used then the server will generate it from the request. From header field domain will be used as realm.
The string may contain pseudo variables.
table (string) - Table to be used to lookup usernames and passwords (usually subscribers table).

This function can be used from REQUEST_ROUTE.

Example 1.15. proxy_authorize usage

...
if (!proxy_authorize("", "subscriber"))
	proxy_challenge("", "auth");  # Realm will be autogenerated
...

1.4.3. `db_is_to_authorized(table)`

The function checks against a 'URI' like table to see if the username extracted from the To header URI is allowed/authorized to use the credentials (authentication username) validated by www_authorize().

The function is part of the mechanism that allows to create mapping between the SIP users (from the FROM/TO headers) and the authentication users (from a SUBSCRIBER-like table) that they use. The mapping is stored into an URI-like table.

Meaning of the parameters is as follows:

table (string) - Table to be used to lookup for the URI/AUTH mappings (usually the URI table).

This function can be used from REQUEST_ROUTE.

Example 1.16. db_is_to_authorized usage

...
if (!db_is_to_authorized("uri")) {
	xlog("User $tu is not authorized to authenticate with $au credential\n");
}
...

1.4.4. `db_is_from_authorized(table)`

Similar to db_is_to_authorized() but instead of checking the TO header URI, the FROM header URI is checked.

1.4.5. `db_does_uri_exist(uri, table)`

Checks if the username@domain from the given URI is an existing user in a 'SUBSCRIBER' like table.

Meaning of the parameters is as follows:

uri (string) - The SIP URI to be tested. It must hold a username part for a valid check. Variables are allowed.
table (string) - Table to be used to search for the URI (usually the SUBSCRIBER table).

This function can be used from REQUEST_ROUTE.

Example 1.17. db_does_uri_exist usage

...
if (db_does_uri_exist($ru, "subscriber")) {
	...
}
...

1.4.6. `db_get_auth_id(table, uri, auth, realm)`

Checks given uri-string username against an 'URI' like table. Returns true if the user exists in the database, and sets the given variables to the authentication id and realm corresponding to the given uri.

Meaning of the parameters is as follows:

table (string) - Table to be used to search for the URI (usually the URI table).
uri (string) - The input SIP URI to be tested. It must hold a username part for a valid check. Variables are allowed.
auth (var) - an output variable to store the found authentication id matching the given SIP URI.
realm (var) - an output variable to store the found authentication realm matching the given SIP URI.

This function can be used from REQUEST_ROUTE ,FAILURE_ROUTE and LOCAL_ROUTE.

Example 1.18. db_get_auth_id usage

...
if (db_get_auth_id("uri", $ru, $avp(auth_id), $avp(auth_realm))) {
	...
}
...

Chapter 2. Contributors

2.1. By Commit Statistics

Table 2.1. Top contributors by DevScore⁽¹⁾, authored commits⁽²⁾ and lines added/removed⁽³⁾

	Name	DevScore	Commits	Lines ++	Lines --
1.	Bogdan-Andrei Iancu (@bogdan-iancu)	51	37	783	380
2.	Jan Janak (@janakj)	50	29	1610	424
3.	Daniel-Constantin Mierla (@miconda)	29	20	130	382
4.	Liviu Chircu (@liviuchircu)	22	17	161	135
5.	Henning Westerholt (@henningw)	11	9	83	49
6.	Razvan Crainea (@razvancrainea)	9	7	29	47
7.	Vlad Patrascu (@rvlad-patrascu)	8	4	69	163
8.	Maksym Sobolyev (@sobomax)	8	3	304	112
9.	Sergio Gutierrez	7	5	13	13
10.	Andrei Pelinescu-Onciul	6	4	81	33

All remaining contributors: Dan Pascu (@danpascu), Jiri Kuthan (@jiriatipteldotorg), Walter Doekes (@wdoekes), Anatoly Pidruchny, Kennard White, Konstantin Bokarius, Richard Revels, Julián Moreno Patiño, Norman Brandinger (@NormB), Peter Lemenkov (@lemenkov), Edson Gellert Schubert, Ionut Ionita (@ionutrazvanionita).

(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)

(2) including any documentation-related commits, excluding merge commits. Regarding imported patches/code, we do our best to count the work on behalf of the proper owner, as per the "fix_authors" and "mod_renames" arrays in opensips/doc/build-contrib.sh. If you identify any patches/commits which do not get properly attributed to you, please submit a pull request which extends "fix_authors" and/or "mod_renames".

(3) ignoring whitespace edits, renamed files and auto-generated files

2.2. By Commit Activity

Table 2.2. Most recently active contributors⁽¹⁾ to this module

	Name	Commit Activity
1.	Liviu Chircu (@liviuchircu)	Mar 2014 - Sep 2022
2.	Maksym Sobolyev (@sobomax)	Oct 2004 - Sep 2021
3.	Bogdan-Andrei Iancu (@bogdan-iancu)	Jun 2005 - Jul 2021
4.	Walter Doekes (@wdoekes)	Apr 2021 - Apr 2021
5.	Razvan Crainea (@razvancrainea)	Jun 2011 - Sep 2019
6.	Vlad Patrascu (@rvlad-patrascu)	May 2017 - Jul 2019
7.	Peter Lemenkov (@lemenkov)	Jun 2018 - Jun 2018
8.	Julián Moreno Patiño	Feb 2016 - Feb 2016
9.	Ionut Ionita (@ionutrazvanionita)	Jan 2015 - Jan 2015
10.	Richard Revels	Sep 2011 - Sep 2011

All remaining contributors: Kennard White, Dan Pascu (@danpascu), Sergio Gutierrez, Henning Westerholt (@henningw), Daniel-Constantin Mierla (@miconda), Konstantin Bokarius, Edson Gellert Schubert, Anatoly Pidruchny, Norman Brandinger (@NormB), Jan Janak (@janakj), Andrei Pelinescu-Onciul, Jiri Kuthan (@jiriatipteldotorg).

(1) including any documentation-related commits, excluding merge commits

Chapter 3. Documentation

3.1. Contributors

Last edited by: Liviu Chircu (@liviuchircu), Maksym Sobolyev (@sobomax), Bogdan-Andrei Iancu (@bogdan-iancu), Peter Lemenkov (@lemenkov), Razvan Crainea (@razvancrainea), Kennard White, Sergio Gutierrez, Daniel-Constantin Mierla (@miconda), Konstantin Bokarius, Edson Gellert Schubert, Henning Westerholt (@henningw), Anatoly Pidruchny, Jan Janak (@janakj).

Auth_db Module

Chapter 1. Admin Guide

1.1. Overview

1.1.1. RFC 8760 Support (Strenghtened Authentication)

1.2. Dependencies

1.2.1. OpenSIPS Modules

1.2.2. External Libraries or Applications

1.3. Exported Parameters

1.3.1. db_url (string)

1.3.2. calculate_ha1 (integer)

1.3.3. use_domain (integer)

1.3.4. load_credentials (string)

1.3.5. skip_version_check (int)

1.3.6. user_column (string)

1.3.7. domain_column (string)

1.3.8. password_column (string)

1.3.9. hash_column_sha256 (string)

1.3.10. hash_column_sha512t256 (string)

1.3.11. uri_user_column (string)

1.3.12. uri_domain_column (string)

1.3.13. uri_uriuser_column (string)

1.4. Exported Functions

1.4.1. www_authorize(realm, table)

1.4.2. proxy_authorize(realm, table)

1.4.3. db_is_to_authorized(table)

1.4.4. db_is_from_authorized(table)

1.4.5. db_does_uri_exist(uri, table)

1.4.6. db_get_auth_id(table, uri, auth, realm)

Chapter 2. Contributors

2.1. By Commit Statistics

2.2. By Commit Activity

Chapter 3. Documentation

3.1. Contributors

1.3.1. `db_url` (string)

1.3.2. `calculate_ha1` (integer)

1.3.3. `use_domain` (integer)

1.3.4. `load_credentials` (string)

1.3.5. `skip_version_check` (int)

1.3.6. `user_column` (string)

1.3.7. `domain_column` (string)

1.3.8. `password_column` (string)

1.3.9. `hash_column_sha256` (string)

1.3.10. `hash_column_sha512t256` (string)

1.3.11. `uri_user_column` (string)

1.3.12. `uri_domain_column` (string)

1.3.13. `uri_uriuser_column` (string)

1.4.1. `www_authorize(realm, table)`

1.4.2. `proxy_authorize(realm, table)`

1.4.3. `db_is_to_authorized(table)`

1.4.4. `db_is_from_authorized(table)`

1.4.5. `db_does_uri_exist(uri, table)`

1.4.6. `db_get_auth_id(table, uri, auth, realm)`