1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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26 #ifndef H_KRB5_KADM5_HOOK_PLUGIN
27 #define H_KRB5_KADM5_HOOK_PLUGIN
30 * @file krb5/krb5_kadm5_hook_plugin.h
31 * Provide a plugin interface for kadm5 operations. This interface
32 * permits a plugin to intercept principal modification, creation and
33 * change password operations. Operations run at two stages: a
34 * precommit stage that runs before the operation is committed to the
35 * database and a postcommit operation that runs after the database
36 * is updated; see #kadm5_hook_stage for details on semantics.
38 * This interface is based on a proposed extension to Heimdal by Russ
39 * Allbery; it is likely that Heimdal will adopt an approach based on
40 * stacked kdb modules rather than this interface. For MIT, writing a
41 * plugin to this interface is significantly easier than stacking kdb
42 * modules. Also, the kadm5 interface is significantly more stable
43 * than the kdb interface, so this approach is more desirable than
44 * stacked kdb modules.
46 * This interface depends on kadm5/admin.h. As such, the interface
47 * does not provide strong guarantees of ABI stability.
49 * kadm5_hook plugins should:
50 * kadm5_hook_<modulename>_initvt, matching the signature:
53 * kadm5_hook_modname_initvt(krb5_context context, int maj_ver, int min_ver,
54 * krb5_plugin_vtable vtable);
56 * The initvt function should:
58 * - Check that the supplied maj_ver number is supported by the module, or
59 * return KRB5_PLUGIN_VER_NOTSUPP if it is not.
61 * - Cast the vtable pointer as appropriate for maj_ver:
62 * maj_ver == 1: Cast to kadm5_hook_vftable_1
64 * - Initialize the methods of the vtable, stopping as appropriate for the
65 * supplied min_ver. Optional methods may be left uninitialized.
67 * Memory for the vtable is allocated by the caller, not by the module.
70 #include <krb5/krb5.h>
71 #include <krb5/plugin.h>
72 #include <kadm5/admin.h>
75 * Whether the operation is being run before or after the database
78 enum kadm5_hook_stage {
79 /** In this stage, any plugin failure prevents following plugins from
80 * running and aborts the operation.*/
81 KADM5_HOOK_STAGE_PRECOMMIT,
82 /** In this stage, plugin failures are logged but otherwise ignored.*/
83 KADM5_HOOK_STAGE_POSTCOMMIT
86 /** Opaque module data pointer. */
87 typedef struct kadm5_hook_modinfo_st kadm5_hook_modinfo;
90 * Interface for the v1 virtual table for the kadm5_hook plugin.
91 * All entry points are optional. The name field must be provided.
93 typedef struct kadm5_hook_vtable_1_st {
95 /** A text string identifying the plugin for logging messages. */
98 /** Initialize a plugin module.
99 * @param modinfo returns newly allocated module info for future
100 * calls. Cleaned up by the fini() function.
102 kadm5_ret_t (*init)(krb5_context, kadm5_hook_modinfo **modinfo);
104 /** Clean up a module and free @a modinfo. */
105 void (*fini)(krb5_context, kadm5_hook_modinfo *modinfo);
107 /** Indicates that the password is being changed.
108 * @param stage is an integer from #kadm5_hook_stage enumeration
109 * @param keepold is true if existing keys are being kept.
110 * @param newpass is NULL if the key sare being randomized.
112 kadm5_ret_t (*chpass)(krb5_context,
113 kadm5_hook_modinfo *modinfo,
115 krb5_principal, krb5_boolean keepold,
117 krb5_key_salt_tuple *ks_tuple,
118 const char *newpass);
120 /** Indicate a principal is created. */
121 kadm5_ret_t (*create)(krb5_context,
122 kadm5_hook_modinfo *,
124 kadm5_principal_ent_t, long mask,
126 krb5_key_salt_tuple *ks_tuple,
127 const char *password);
129 /** Modify a principal. */
130 kadm5_ret_t (*modify)(krb5_context,
131 kadm5_hook_modinfo *,
133 kadm5_principal_ent_t, long mask);
135 /** Indicate a principal is deleted. */
136 kadm5_ret_t (*remove)(krb5_context,
137 kadm5_hook_modinfo *modinfo,
138 int stage, krb5_principal);
140 /* End of minor version 1. */
141 } kadm5_hook_vftable_1;
143 #endif /*H_KRB5_KADM5_HOOK_PLUGIN*/