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/*-
* Copyright (c) 2011 Dag-Erling Smørgrav
* All rights reserved.
*
* 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, this list of conditions and the following disclaimer
* in this position and unchanged.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $Id: openpam_dump_policy.c 582 2012-04-06 23:23:35Z des $
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <security/pam_appl.h>
#include "openpam_impl.h"
static char *
openpam_chain_name(const char *service, pam_facility_t fclt)
{
const char *facility = pam_facility_name[fclt];
char *name;
if (asprintf(&name, "pam_%s_%s", service, facility) == -1)
return (NULL);
return (name);
}
static char *
openpam_facility_index_name(pam_facility_t fclt)
{
const char *facility = pam_facility_name[fclt];
char *name, *p;
if (asprintf(&name, "PAM_%s", facility) == -1)
return (NULL);
for (p = name + 4; *p; ++p)
*p = toupper(*p);
return (name);
}
int
openpam_dump_chain(const char *name, pam_chain_t *chain)
{
char *modname, **opt, *p;
int i;
for (i = 0; chain != NULL; ++i, chain = chain->next) {
/* declare the module's struct pam_module */
modname = strrchr(chain->module->path, '/');
modname = strdup(modname ? modname : chain->module->path);
if (modname == NULL)
return (PAM_BUF_ERR);
for (p = modname; *p && *p != '.'; ++p)
/* nothing */ ;
*p = '\0';
printf("extern struct pam_module %s_pam_module;\n", modname);
/* module arguments */
printf("static char *%s_%d_optv[] = {\n", name, i);
for (opt = chain->optv; *opt; ++opt) {
printf("\t\"");
for (p = *opt; *p; ++p) {
if (isprint((unsigned char)*p) && *p != '"')
printf("%c", *p);
else
printf("\\x%02x", (unsigned char)*p);
}
printf("\",\n");
}
printf("\tNULL,\n");
printf("};\n");
/* next module in chain */
if (chain->next != NULL)
printf("static pam_chain_t %s_%d;\n", name, i + 1);
/* chain entry */
printf("static pam_chain_t %s_%d = {\n", name, i);
printf("\t.module = &%s_pam_module,\n", modname);
printf("\t.flag = 0x%08x,\n", chain->flag);
printf("\t.optc = %d,\n", chain->optc);
printf("\t.optv = %s_%d_optv,\n", name, i);
if (chain->next)
printf("\t.next = &%s_%d,\n", name, i + 1);
else
printf("\t.next = NULL,\n");
printf("};\n");
free(modname);
}
return (PAM_SUCCESS);
}
int
openpam_dump_policy(const char *service)
{
pam_handle_t *pamh;
char *name;
int fclt, ret;
if ((pamh = calloc(1, sizeof *pamh)) == NULL)
return (PAM_BUF_ERR);
if ((ret = openpam_configure(pamh, service)) != PAM_SUCCESS)
return (ret);
for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) {
if (pamh->chains[fclt] != NULL) {
if ((name = openpam_chain_name(service, fclt)) == NULL)
return (PAM_BUF_ERR);
ret = openpam_dump_chain(name, pamh->chains[fclt]);
free(name);
if (ret != PAM_SUCCESS)
return (ret);
}
}
printf("static pam_policy_t pam_%s_policy = {\n", service);
printf("\t.service = \"%s\",\n", service);
printf("\t.chains = {\n");
for (fclt = 0; fclt < PAM_NUM_FACILITIES; ++fclt) {
if ((name = openpam_facility_index_name(fclt)) == NULL)
return (PAM_BUF_ERR);
printf("\t\t[%s] = ", name);
free(name);
if (pamh->chains[fclt] != NULL) {
if ((name = openpam_chain_name(service, fclt)) == NULL)
return (PAM_BUF_ERR);
printf("&%s_0,\n", name);
free(name);
} else {
printf("NULL,\n");
}
}
printf("\t},\n");
printf("};\n");
free(pamh);
return (PAM_SUCCESS);
}
static void
usage(void)
{
fprintf(stderr, "usage: openpam_dump_policy [-d] policy ...\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int i, opt;
while ((opt = getopt(argc, argv, "d")) != -1)
switch (opt) {
case 'd':
openpam_debug = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
printf("#include <security/pam_appl.h>\n");
printf("#include \"openpam_impl.h\"\n");
for (i = 0; i < argc; ++i)
openpam_dump_policy(argv[i]);
printf("pam_policy_t *pam_embedded_policies[] = {\n");
for (i = 0; i < argc; ++i)
printf("\t&pam_%s_policy,\n", argv[i]);
printf("\tNULL,\n");
printf("};\n");
exit(0);
}
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