4 * If you want to dynamically load libpam using dlopen() or something,
5 * then dlopen( ' this shared object ' ); It takes care of exporting
6 * the right symbols to any modules loaded by libpam.
11 #include <security/pam_appl.h>
12 #include <security/_pam_macros.h>
15 #define LIBPAMPATH "/lib/libpam.so"
18 static void *libpam_h = NULL;
20 #define CONFIRM_PAM_FUNCTION(x, y, z, err) \
22 union { const void *tpointer; y (*fn) z ; } fptr; \
23 fptr.tpointer = dlsym(libpam_h, #x); real_##x = fptr.fn; \
24 if (real_##x == NULL) { \
25 D(("unable to resolve '" #x "': %s", dlerror())); \
31 extern void _init(void);
35 if (libpam_h == NULL) {
36 libpam_h = dlopen(LIBPAMPATH, RTLD_GLOBAL|RTLD_NOW);
40 extern void _fini(void);
44 if (libpam_h != NULL) {
49 int pam_start(const char *service_name, const char *user,
50 const struct pam_conv *pam_conversation,
53 static int (*real_pam_start)(const char *, const char *,
54 const struct pam_conv *,
56 CONFIRM_PAM_FUNCTION(pam_start, int, (const char *, const char *,
57 const struct pam_conv *,
58 pam_handle_t **), PAM_ABORT);
59 return real_pam_start(service_name, user, pam_conversation, pamh);
62 int pam_end(pam_handle_t *pamh, int pam_status)
64 static int (*real_pam_end)(pam_handle_t *, int);
65 CONFIRM_PAM_FUNCTION(pam_end, int, (pam_handle_t *, int), PAM_ABORT);
66 return real_pam_end(pamh, pam_status);
69 int pam_set_item(pam_handle_t *pamh, int item_type, const void *item)
71 static int (*real_pam_set_item)(pam_handle_t *, int, const void *);
72 CONFIRM_PAM_FUNCTION(pam_set_item, int,
73 (pam_handle_t *, int, const void *), PAM_ABORT);
74 return real_pam_set_item(pamh, item_type, item);
77 int pam_get_item(const pam_handle_t *pamh, int item_type, const void **item)
79 static int (*real_pam_get_item)(const pam_handle_t *, int, const void **);
80 CONFIRM_PAM_FUNCTION(pam_get_item, int,
81 (const pam_handle_t *, int, const void **),
83 return real_pam_get_item(pamh, item_type, item);
86 int pam_fail_delay(pam_handle_t *pamh, unsigned int musec_delay)
88 static int (*real_pam_fail_delay)(pam_handle_t *, unsigned int);
89 CONFIRM_PAM_FUNCTION(pam_fail_delay, int, (pam_handle_t *, unsigned int),
91 return real_pam_fail_delay(pamh, musec_delay);
94 typedef const char * const_char_pointer;
96 const_char_pointer pam_strerror(pam_handle_t *pamh, int errnum)
98 static const_char_pointer (*real_pam_strerror)(pam_handle_t *, int);
99 CONFIRM_PAM_FUNCTION(pam_strerror, const_char_pointer,
100 (pam_handle_t *, int), NULL);
101 return real_pam_strerror(pamh, errnum);
104 int pam_putenv(pam_handle_t *pamh, const char *name_value)
106 static int (*real_pam_putenv)(pam_handle_t *, const char *);
107 CONFIRM_PAM_FUNCTION(pam_putenv, int, (pam_handle_t *, const char *),
109 return real_pam_putenv(pamh, name_value);
112 const_char_pointer pam_getenv(pam_handle_t *pamh, const char *name)
114 static const_char_pointer (*real_pam_getenv)(pam_handle_t *, const char *);
115 CONFIRM_PAM_FUNCTION(pam_getenv, const_char_pointer,
116 (pam_handle_t *, const char *), NULL);
117 return real_pam_getenv(pamh, name);
120 typedef char ** char_ppointer;
121 char_ppointer pam_getenvlist(pam_handle_t *pamh)
123 static char_ppointer (*real_pam_getenvlist)(pam_handle_t *);
124 CONFIRM_PAM_FUNCTION(pam_getenvlist, char_ppointer, (pam_handle_t *),
126 return real_pam_getenvlist(pamh);
129 /* Authentication management */
131 int pam_authenticate(pam_handle_t *pamh, int flags)
133 static int (*real_pam_authenticate)(pam_handle_t *, int);
134 CONFIRM_PAM_FUNCTION(pam_authenticate, int, (pam_handle_t *, int),
136 return real_pam_authenticate(pamh, flags);
139 int pam_setcred(pam_handle_t *pamh, int flags)
141 static int (*real_pam_setcred)(pam_handle_t *, int);
142 CONFIRM_PAM_FUNCTION(pam_setcred, int, (pam_handle_t *, int), PAM_ABORT);
143 return real_pam_setcred(pamh, flags);
146 /* Account Management API's */
148 int pam_acct_mgmt(pam_handle_t *pamh, int flags)
150 static int (*real_pam_acct_mgmt)(pam_handle_t *, int);
151 CONFIRM_PAM_FUNCTION(pam_acct_mgmt, int, (pam_handle_t *, int), PAM_ABORT);
152 return real_pam_acct_mgmt(pamh, flags);
155 /* Session Management API's */
157 int pam_open_session(pam_handle_t *pamh, int flags)
159 static int (*real_pam_open_session)(pam_handle_t *, int);
160 CONFIRM_PAM_FUNCTION(pam_open_session, int, (pam_handle_t *, int),
162 return real_pam_open_session(pamh, flags);
165 int pam_close_session(pam_handle_t *pamh, int flags)
167 static int (*real_pam_close_session)(pam_handle_t *, int);
168 CONFIRM_PAM_FUNCTION(pam_close_session, int, (pam_handle_t *, int),
170 return real_pam_close_session(pamh, flags);
173 /* Password Management API's */
175 int pam_chauthtok(pam_handle_t *pamh, int flags)
177 static int (*real_pam_chauthtok)(pam_handle_t *, int);
178 CONFIRM_PAM_FUNCTION(pam_chauthtok, int, (pam_handle_t *, int), PAM_ABORT);
179 return real_pam_chauthtok(pamh, flags);