107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
/*
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* This file implements the following functions:
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* pam_modutil_search_key:
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* lookup a value for key in login.defs file or similar key value format
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*/
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#include "pam_private.h"
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#include "pam_modutil_private.h"
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#include <security/pam_ext.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#ifdef USE_ECONF
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#include "pam_econf.h"
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#endif
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#ifdef USE_ECONF
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#define LOGIN_DEFS "/etc/login.defs"
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#ifndef VENDORDIR
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#define VENDORDIR NULL
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#endif
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static char *
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econf_search_key (const char *name, const char *suffix, const char *key)
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{
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econf_file *key_file = NULL;
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char *val;
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econf_err error;
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error = pam_econf_readconfig (&key_file, VENDORDIR, SYSCONFDIR, name, suffix,
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" \t", "#", NULL, NULL);
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if (error != ECONF_SUCCESS) {
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econf_free (key_file);
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return NULL;
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}
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if (econf_getStringValue (key_file, NULL, key, &val)) {
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econf_free (key_file);
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return NULL;
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}
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econf_free (key_file);
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return val;
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}
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#endif
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/* lookup a value for key in login.defs file or similar key value format */
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char *
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pam_modutil_search_key(pam_handle_t *pamh UNUSED,
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const char *file_name,
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const char *key)
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{
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FILE *fp;
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char *buf = NULL;
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size_t buflen = 0;
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char *retval = NULL;
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#ifdef USE_ECONF
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if (strcmp (file_name, LOGIN_DEFS) == 0)
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return econf_search_key ("login", ".defs", key);
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#endif
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fp = fopen(file_name, "r");
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if (NULL == fp)
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return NULL;
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while (!feof(fp)) {
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char *tmp, *cp;
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ssize_t n = getline(&buf, &buflen, fp);
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cp = buf;
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if (n < 1)
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break;
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if (cp[n - 1] == '\n')
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cp[n - 1] = '\0';
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tmp = strchr(cp, '#'); /* remove comments */
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if (tmp)
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*tmp = '\0';
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while (isspace((unsigned char)*cp)) /* remove spaces and tabs */
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++cp;
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if (*cp == '\0') /* ignore empty lines */
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continue;
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tmp = strsep (&cp, " \t=");
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if (cp != NULL)
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while (isspace((unsigned char)*cp) || *cp == '=')
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++cp;
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else
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cp = buf + n; /* empty string */
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if (strcasecmp(tmp, key) == 0) {
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retval = strdup(cp);
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break;
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}
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}
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fclose(fp);
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free(buf);
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return retval;
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}
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