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1 | <?xml version="1.0"?> |
2 | <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><title>auth_generic</title><link rel="stylesheet" href="style.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"/><link rel="start" href="#auth-generic" title="auth_generic"/><link xmlns="" rel="stylesheet" type="text/css" href="manpage.css"/><meta xmlns="" name="MSSmartTagsPreventParsing" content="TRUE"/><link xmlns="" rel="icon" href="icon.gif" type="image/gif"/><!-- |
3 | |
4 | Copyright 1998 - 2007 Double Precision, Inc. See COPYING for distribution |
5 | information. |
6 | |
7 | --></head><body><div class="refentry" lang="en" xml:lang="en"><a id="auth-generic" shape="rect"> </a><div class="titlepage"/><div class="refnamediv"><h2>Name</h2><p>auth_generic — Generic authentication request</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="literallayout"><p><br clear="none"/> |
8 | #include <courierauth.h><br clear="none"/> |
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9 | </p></div><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td rowspan="1" colspan="1"><code class="funcdef">int rc=<b class="fsfunc">auth_generic</b>(</code></td><td rowspan="1" colspan="1">const char * </td><td rowspan="1" colspan="1"><var class="pdparam">service</var>, </td></tr><tr><td rowspan="1" colspan="1"> </td><td rowspan="1" colspan="1">const char * </td><td rowspan="1" colspan="1"><var class="pdparam">authtype</var>, </td></tr><tr><td rowspan="1" colspan="1"> </td><td rowspan="1" colspan="1">const char * </td><td rowspan="1" colspan="1"><var class="pdparam">authdata</var>, </td></tr><tr><td rowspan="1" colspan="1"> </td><td rowspan="1" colspan="1">int </td><td rowspan="1" colspan="1"><var class="pdparam">(*callback_func)</var><code>(</code>struct authinfo *, void *<code>)</code>, </td></tr><tr><td rowspan="1" colspan="1"> </td><td rowspan="1" colspan="1">void * </td><td rowspan="1" colspan="1"><var class="pdparam">callback_arg</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="id282334" shape="rect"> </a><h2>DESCRIPTION</h2><p> |
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10 | <code class="function">auth_generic</code> processes a generic authentication request. |
11 | You do not want to use this function. |
12 | You really want to use |
13 | <a href="auth_login.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_login</span>(3)</span></a>. |
14 | <em class="parameter"><code>service</code></em> specifies which so-called "service" is |
15 | being authenticated; like “<span class="quote">imap</span>” or “<span class="quote">pop3</span>”. |
16 | <em class="parameter"><code>service</code></em> may or may not be used by the Courier |
17 | authentication library's configured back-end module.</p><p> |
18 | <code class="function">authtype</code> specifies the format of the authentication |
19 | request. |
20 | Three authentication formats are defined in |
21 | <code class="filename">courierauth.h</code>:</p><div class="variablelist"><dl><dt><span class="term"><code class="literal">AUTHTYPE_LOGIN</code></span></dt><dd><p> |
22 | <em class="parameter"><code>authdata</code></em> contains the following string: |
23 | “<span class="quote"><em class="replaceable"><code>userid</code></em>\n<em class="replaceable"><code>password</code></em>\n</span>”. |
24 | That is, the userid being authenticated, an <acronym class="acronym">ASCII</acronym> |
25 | newline character, the password, and a second newline character.</p></dd><dt><span class="term"><code class="literal">AUTHTYPE_CRAMMD5</code> or <code class="literal">AUTHTYPE_CRAMSHA1</code></span></dt><dd><p> |
26 | This format is used |
27 | with <acronym class="acronym">CRAM-MD5</acronym> or <acronym class="acronym">CRAM-SHA1</acronym>. |
28 | <em class="parameter"><code>authdata</code></em> contains the following string: |
29 | “<span class="quote"><em class="replaceable"><code>challenge</code></em>\n<em class="replaceable"><code>response</code></em>\n</span>”. |
30 | <em class="replaceable"><code>challenge</code></em> is the base64-encoded challenge, which |
31 | is followed by an <acronym class="acronym">ASCII</acronym> |
32 | newline character. |
33 | <em class="replaceable"><code>response</code></em> is a base64-encoded string that's |
34 | followed by a second newline character. |
35 | The base64-encoded string consists of the responding userid, a space |
36 | character, then the response to the challenge expressed as hexadecimal |
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37 | digits.</p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="id282687" shape="rect"> </a><h2>RETURNS</h2><p> |
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38 | <code class="function">callback_func</code> will be invoked if |
39 | <code class="function">auth_generic</code> |
40 | succeeds, and <code class="function">callback_func</code>'s return value becomes |
41 | the return value from <code class="function">auth_generic</code> (which should be 0, by convention). |
42 | <code class="function">callback_func</code> will not be invoked if an error occurs, |
43 | which is reported by a non-zero return value from <code class="function">auth_generic</code>. |
44 | By convention, a positive return value indicates an internal, temporary |
45 | failure, such as the authentication daemon process not running; a negative |
46 | return value indicates that this request was processed, but it failed.</p><p> |
47 | The second argument to <code class="function">callback_func</code> will be |
48 | <code class="function">callback_arg</code>, which is not interpreted by this |
49 | function in any way. |
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50 | The first argument will be a pointer to the following structure:</p><div class="blockquote"><blockquote class="blockquote"><div class="example"><a id="id281965" shape="rect"> </a><p class="title"><b>Example 1. struct authinfo</b></p><div class="example-contents"><pre class="programlisting" xml:space="preserve"> |
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51 | struct authinfo { |
52 | const char *sysusername; |
53 | const uid_t *sysuserid; |
54 | gid_t sysgroupid; |
55 | const char *homedir; |
56 | |
57 | const char *address; |
58 | const char *fullname; |
59 | const char *maildir; |
60 | const char *quota; |
61 | const char *passwd; |
62 | const char *clearpasswd; |
63 | |
64 | const char *options; |
65 | |
66 | } ; |
67 | </pre></div></div><br class="example-break" clear="none"/></blockquote></div><p> |
68 | Description of the above fields:</p><div class="variablelist"><dl><dt><span class="term">address</span></dt><dd><p> |
69 | The authenticated login ID.</p></dd><dt><span class="term">sysusername</span></dt><dd><p> |
70 | The authenticated account's userid and groupid can be looked up in the |
71 | password file using <code class="literal">address</code>. |
72 | If this field is <code class="literal">NULL</code>, obtain the userid and the groupid from |
73 | <code class="literal">sysuserid</code> and <code class="literal">sysgroupid</code>.</p></dd><dt><span class="term">sysuserid</span></dt><dd><p> |
74 | <code class="literal">sysuserid</code> may be <code class="literal">NULL</code> if |
75 | <code class="literal">sysusername</code> is initialized, otherwise it's a pointer to |
76 | the account's numeric userid.</p></dd><dt><span class="term">sysgroupid</span></dt><dd><p> |
77 | Account's numeric groupid. |
78 | <code class="literal">sysgroupid</code> is only used when <code class="literal">sysusername</code> |
79 | is <code class="literal">NULL</code>.</p></dd><dt><span class="term">fullname</span></dt><dd><p> |
80 | This is the account's full name. |
81 | This field is optional, it may be <code class="literal">NULL</code>.</p></dd><dt><span class="term">homedir</span></dt><dd><p> |
82 | The account's home directory. |
83 | This field cannot be <code class="literal">NULL</code>.</p></dd><dt><span class="term">maildir</span></dt><dd><p> |
84 | The pathname to the account's mailbox. |
85 | This field is optional, it can be <code class="literal">NULL</code> in which case the |
86 | default location is assumed.</p></dd><dt><span class="term">quota</span></dt><dd><p> |
87 | Optional maildir quota on the account's mailbox (and <code class="literal">NULL</code> |
88 | if no quota is set).</p></dd><dt><span class="term">passwd</span></dt><dd><p> |
89 | The account's encrypted password, if available. |
90 | If the account has a cleartext password defined, this field |
91 | can be set to <code class="literal">NULL</code>. |
92 | The encrypted password can take several formats:</p><div class="itemizedlist"><ul type="disc"><li><p> |
93 | A traditional triple-DES crypted password, or a MD5+salt-hashed password, |
94 | as used in Linux.</p></li><li><p> |
95 | “<span class="quote">{MD5}</span>” followed by a base64-encoded MD5 hash |
96 | of the password.</p></li><li><p> |
97 | “<span class="quote">{SHA}</span>” followed by a base64-encoded SHA1 hash |
98 | of the password.</p></li></ul></div></dd><dt><span class="term">clearpasswd</span></dt><dd><p> |
99 | The account's cleartext password, if available. |
100 | If the account has an encrypted password defined, this field |
101 | can be set to <code class="literal">NULL</code>.</p></dd><dt><span class="term">options</span></dt><dd><p> |
102 | A comma-separated list of miscellaneous account options. |
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103 | See below for more information.</p></dd></dl></div><div class="refsect2" lang="en" xml:lang="en"><a id="id325784" shape="rect"> </a><h3>Account options</h3><p> |
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104 | Depending on the configuration of the Courier authentication library, |
105 | accounts may have individual options associated with them. |
106 | If the authentication library configuration does not implement account |
107 | options, the option string will be <code class="literal">NULL</code>. |
108 | Otherwise it will be a comma-separated list of |
109 | “<span class="quote"><em class="replaceable"><code>option</code></em>=<em class="replaceable"><code>value</code></em></span>” |
110 | settings.</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> |
111 | This is the account option implementation |
112 | that's used by Courier, Courier-IMAP, and |
113 | SqWebMail packages. Some of the following information is obviously |
114 | not applicable for a particular package. |
115 | The inapplicable bits should be obvious.</p></div><p> |
116 | The following options are recognized by the various Courier |
117 | packages:</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> |
118 | The application is responsible for enforcing all the “<span class="quote">disabled</span>” |
119 | option. |
120 | An authentication request for service “<span class="quote">imap</span>”, for example, |
121 | will succeed provided that the userid and the password are valid, |
122 | even if “<span class="quote">disableimap=1</span>” is set. |
123 | The application's <code class="function">callback_func</code> should check for this |
124 | condition, and return a negative return code.</p></div><div class="variablelist"><dl><dt><span class="term"><code class="literal">disableimap=</code><em class="replaceable"><code>n</code></em></span></dt><dd><p> |
125 | If "n" is 1, IMAP access to this account should be disabled.</p></dd><dt><span class="term"><code class="literal">disablepop3=</code><em class="replaceable"><code>n</code></em></span></dt><dd><p> |
126 | If "n" is 1, POP3 access to this account should be disabled.</p></dd><dt><span class="term"><code class="literal">disablewebmail=</code><em class="replaceable"><code>n</code></em></span></dt><dd><p> |
127 | If "n" is 1, webmail access to this account should be disabled.</p></dd><dt><span class="term"><code class="literal">disableshared=</code><em class="replaceable"><code>n</code></em></span></dt><dd><p> |
128 | If "n" is 1, this account should not have access to shared folders or be able |
129 | to share its own folders with other people.</p></dd><dt><span class="term"><code class="literal">group=</code><em class="replaceable"><code>name</code></em></span></dt><dd><p> |
130 | This account is a member of access group |
131 | <em class="replaceable"><code>name</code></em>. |
132 | Instead of granting access rights on individual mail folders to individual |
133 | accounts, the access rights can be granted to an access group |
134 | “<span class="quote">name</span>”, and all members of this group get the specified access |
135 | rights.</p><p> |
136 | The access group name “<span class="quote">administrators</span>” is a reserved group. |
137 | All accounts in the <code class="literal">administrators</code> group automatically |
138 | receive all rights to all accessible folders.</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> |
139 | This option may be specified multiple times to specify that the account |
140 | belongs to multiple account groups.</p></div></dd><dt><span class="term"><code class="literal">sharedgroup=</code><em class="replaceable"><code>name</code></em></span></dt><dd><p> |
141 | Append "name" to the name of the top level virtual shared folder |
142 | index file. This setting restricts which virtual shared folders this |
143 | account could possibly access (and that's on top of whatever else the |
144 | access control lists say). See the virtual shared folder documentation |
145 | for more information.</p><p> |
146 | For technical reasons, group names may not include comma, tab, "/" or "|" |
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147 | characters.</p></dd></dl></div></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="id326282" shape="rect"> </a><h2>SEE ALSO</h2><p> |
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148 | <a href="authlib.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">authlib</span>(3)</span></a>, |
149 | |
150 | <a href="auth_login.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_login</span>(3)</span></a>, |
151 | |
152 | <a href="auth_getuserinfo.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_getuserinfo</span>(3)</span></a>, |
153 | |
154 | <a href="auth_enumerate.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_enumerate</span>(3)</span></a>, |
155 | |
156 | <a href="auth_passwd.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_passwd</span>(3)</span></a>, |
157 | |
158 | <a href="auth_getoption.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">auth_getoption</span>(3)</span></a>.</p></div></div></body></html> |