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| 13 | <h1>Courier MySQL authentication module</h1> |
| 14 | |
| 15 | <p>This module allows authentication information to be stored in a MySQL |
| 16 | database.</p> |
| 17 | <ul> |
| 18 | <li>Supports both physical and virtual mail accounts.<br /> |
| 19 | <br /> |
| 20 | </li> |
| 21 | <li>Can be configured to use either crypted or cleartext passwords (or |
| 22 | both). Cleartext passwords allow CRAM-MD5 authentication to be |
| 23 | implemented.</li> |
| 24 | </ul> |
| 25 | |
| 26 | <p>When <code>authmysql</code> is installed, a default configuration file, |
| 27 | <code>authmysqlrc</code> will be installed too. You must edit this file to |
| 28 | set up your MySQL authentication.</p> |
| 29 | |
| 30 | <hr /> |
| 31 | |
| 32 | <p>Edit <code>authmysqlrc</code>, and initialize the following variables:</p> |
| 33 | <ul> |
| 34 | <li><code>MYSQL_SERVER</code> - MySQL server name (required).</li> |
| 35 | <li><code>MYSQL_PORT</code> - server port where MySQL accepts |
| 36 | connections.</li> |
| 37 | <li><code>MYSQL_SOCKET</code> - If MySQL is running on the same machine and |
| 38 | can accept connections from a filesystem socket, enter the path to the |
| 39 | filesystem socket here, and do not initialize SERVER/PORT.</li> |
| 40 | <li><code>MYSQL_USERNAME</code> - MySQL username with log in with |
| 41 | (required).</li> |
| 42 | <li><code>MYSQL_PASSWORD</code> - MySQL password with log in with |
| 43 | (required).</li> |
| 44 | <li><code>MYSQL_DATABASE</code> - MySQL database to log in to |
| 45 | (required).</li> |
| 46 | <li><code>MYSQL_SSL_KEY</code> - name of the field containing a SSL key path |
| 47 | (optional).</li> |
| 48 | <li><code>MYSQL_SSL_CERT</code> - name of the field containing a SSL |
| 49 | certificate path (optional).</li> |
| 50 | <li><code>MYSQL_SSL_CACERT</code> - name of the field containing a SSL CA |
| 51 | certificate (optional).</li> |
| 52 | <li><code>MYSQL_SSL_CAPATH</code> - name of the filend containing a name to a |
| 53 | directory that contains trusted SSL CA certificates in pem format. (optional).</li> |
| 54 | <li><code>MYSQL_SSL_CIPHER</code> - name of the field containing a SSL |
| 55 | cipher list (optional).</li> |
| 56 | <li><code>MYSQL_USER_TABLE</code> - name of the MySQL with the |
| 57 | authentication information (see below) (required).</li> |
| 58 | <li><code>MYSQL_LOGIN_FIELD</code> - field that contains the login id for |
| 59 | this account.</li> |
| 60 | <li><code>MYSQL_CRYPT_PWFIELD</code> - name of the field containing the |
| 61 | crypt-ed password (either <code>MYSQL_CRYPT_PWFIELD</code> or |
| 62 | <code>MYSQL_CLEAR_PWFIELD</code> is required). <strong>NOTE: this |
| 63 | password must be crypt-ed using the operating system's crypt function, |
| 64 | NOT MySQL's crypt function. MySQL's crypt() function is non-standard and |
| 65 | is not generally compatible with the operating system's crypt |
| 66 | function.</strong></li> |
| 67 | <li><code>MYSQL_CLEAR_PWFIELD</code> - name of the field containing the |
| 68 | cleartext password (either <code>MYSQL_CRYPT_PWFIELD</code> or |
| 69 | <code>MYSQL_CLEAR_PWFIELD</code> is required).</li> |
| 70 | <li><code>MYSQL_UID_FIELD</code> - field that contains the system userid |
| 71 | for this account.</li> |
| 72 | <li><code>MYSQL_GID_FIELD</code> - field that contains the system groupid |
| 73 | for this account.</li> |
| 74 | <li><code>MYSQL_MAILDIR_FIELD</code> - name of the field containing a |
| 75 | non-default location of the account's system mailbox (optional).</li> |
| 76 | <li><code>MYSQL_DEFAULTDELIVERY</code> - default mail delivery instructions |
| 77 | for the Courier mail server. If this field in the record is not empty, |
| 78 | its contents supercede the DEFAULTDELIVERY setting.</li> |
| 79 | <li><code>MYSQL_QUOTA_FIELD</code> - name of the field containing a maildir |
| 80 | quota (optional).</li> |
| 81 | <li><code>MYSQL_AUXOPTIONS</code> - auxiliary options. This field, if |
| 82 | defined, should consist of a <code>VARCHAR</code> consisting of a |
| 83 | comma-separate list of "<code>IDENTIFIER=VALUE</code>" pairs, that |
| 84 | specify per-account options. See INSTALL's description of the "Account |
| 85 | OPTIONS" setting for more information.</li> |
| 86 | <li><code>DEFAULT_DOMAIN</code> - if the user logs in without specifying |
| 87 | <code>@domain</code>, use the following domain (in this case the id field |
| 88 | must always contain <code>user@host</code>) (optional).</li> |
| 89 | <li><code>MYSQL_WHERE_CLAUSE</code> - optional freeform SQL that is |
| 90 | appended to the SQL query string.</li> |
| 91 | </ul> |
| 92 | |
| 93 | <p>Here's a recommended definition of <code>MYSQL_USER_TABLE</code>:</p> |
| 94 | <pre>CREATE TABLE passwd ( |
| 95 | id char(128) DEFAULT '' NOT NULL, |
| 96 | crypt char(128) DEFAULT '' NOT NULL, |
| 97 | clear char(128) DEFAULT '' NOT NULL, |
| 98 | name char(128) DEFAULT '' NOT NULL, |
| 99 | uid int(10) unsigned DEFAULT '65534' NOT NULL, |
| 100 | gid int(10) unsigned DEFAULT '65534' NOT NULL, |
| 101 | home char(255) DEFAULT '' NOT NULL, |
| 102 | maildir char(255) DEFAULT '' NOT NULL, |
| 103 | defaultdelivery char(255) DEFAULT '' NOT NULL, |
| 104 | quota char(255) DEFAULT '' NOT NULL, |
| 105 | options char(255) DEFAULT '' NOT NULL, |
| 106 | KEY id (id(128)) |
| 107 | );</pre> |
| 108 | |
| 109 | <p>Observe that a valid SQL expression may be used in place of any field |
| 110 | setting, since all that happens is that the contents of the settings are |
| 111 | inserted into an SQL SELECT statement. Specifically, the <code>options</code> |
| 112 | field may be replaced by several normal fields, such as |
| 113 | "<code>disablepop3</code>", "<code>disableimap</code>", |
| 114 | "<code>disablewebmail</code>", and "<code>sharedgroup</code>"; then |
| 115 | <code>MYSQL_AUXOPTIONS</code> would be set to:</p> |
| 116 | |
| 117 | <blockquote> |
| 118 | <code>CONCAT("disableimap=",disableimap,",disablepop3=",disablepop3,",disablewebmail=",disablewebmail,",sharedgroup=",sharedgroup)</code></blockquote> |
| 119 | |
| 120 | <p>This results in the expected comma-delimited options list, which is built |
| 121 | up from individual table fields.</p> |
| 122 | </body> |
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