diff options
Diffstat (limited to 'libpam/pam_data.c')
| -rw-r--r-- | libpam/pam_data.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libpam/pam_data.c b/libpam/pam_data.c new file mode 100644 index 00000000..30570afb --- /dev/null +++ b/libpam/pam_data.c @@ -0,0 +1,166 @@ +/* + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * ALTERNATIVELY, this product may be distributed under the terms of + * the GNU Public License, in which case the provisions of the GPL are + * required INSTEAD OF the above restrictions. (This clause is + * necessary due to a potential bad interaction between the GPL and + * the restrictions contained in a BSD-style copyright.) + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" + +#include "pam_private.h" + +#include <stdlib.h> +#include <string.h> + +static struct pam_data *_pam_locate_data(const pam_handle_t *pamh, + const char *name) +{ + struct pam_data *data; + + D(("called")); + + IF_NO_PAMH("_pam_locate_data", pamh, NULL); + + data = pamh->data; + + while (data) { + if (!strcmp(data->name, name)) { + return data; + } + data = data->next; + } + + return NULL; +} + +int pam_set_data( + pam_handle_t *pamh, + const char *module_data_name, + void *data, + void (*cleanup)(pam_handle_t *pamh, void *data, int error_status)) +{ + struct pam_data *data_entry; + + D(("called")); + + IF_NO_PAMH("pam_set_data", pamh, PAM_SYSTEM_ERR); + + if (__PAM_FROM_APP(pamh)) { + D(("called from application!?")); + return PAM_SYSTEM_ERR; + } + + /* module_data_name should not be NULL */ + if (module_data_name == NULL) { + D(("called with NULL as module_data_name")); + return PAM_SYSTEM_ERR; + } + + /* first check if there is some data already. If so clean it up */ + + if ((data_entry = _pam_locate_data(pamh, module_data_name))) { + if (data_entry->cleanup) { + data_entry->cleanup(pamh, data_entry->data, + PAM_DATA_REPLACE | PAM_SUCCESS ); + } + } else if ((data_entry = malloc(sizeof(*data_entry)))) { + char *tname; + + if ((tname = _pam_strdup(module_data_name)) == NULL) { + pam_syslog(pamh, LOG_CRIT, + "pam_set_data: no memory for data name"); + _pam_drop(data_entry); + return PAM_BUF_ERR; + } + data_entry->next = pamh->data; + pamh->data = data_entry; + data_entry->name = tname; + } else { + pam_syslog(pamh, LOG_CRIT, + "pam_set_data: cannot allocate data entry"); + return PAM_BUF_ERR; + } + + data_entry->data = data; /* note this could be NULL */ + data_entry->cleanup = cleanup; + + return PAM_SUCCESS; +} + +int pam_get_data( + const pam_handle_t *pamh, + const char *module_data_name, + const void **datap) +{ + struct pam_data *data; + + D(("called")); + + IF_NO_PAMH("pam_get_data", pamh, PAM_SYSTEM_ERR); + + if (__PAM_FROM_APP(pamh)) { + D(("called from application!?")); + return PAM_SYSTEM_ERR; + } + + /* module_data_name should not be NULL */ + if (module_data_name == NULL) { + D(("called with NULL as module_data_name")); + return PAM_SYSTEM_ERR; + } + + data = _pam_locate_data(pamh, module_data_name); + if (data) { + *datap = data->data; + return PAM_SUCCESS; + } + + return PAM_NO_MODULE_DATA; +} + +void _pam_free_data(pam_handle_t *pamh, int status) +{ + struct pam_data *last; + struct pam_data *data; + + D(("called")); + + IF_NO_PAMH("_pam_free_data", pamh, /* no return value for void fn */); + data = pamh->data; + + while (data) { + last = data; + data = data->next; + if (last->cleanup) { + last->cleanup(pamh, last->data, status); + } + _pam_drop(last->name); + _pam_drop(last); + } +} |