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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:01:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 12:01:37 +0000 |
commit | de848d9e9146434817c65d74d1d0313e9d729462 (patch) | |
tree | dcbd0efb229b17f696f7195671f05b354b4f70fc /libpam/pam_modutil_searchkey.c | |
parent | Initial commit. (diff) | |
download | pam-de848d9e9146434817c65d74d1d0313e9d729462.tar.xz pam-de848d9e9146434817c65d74d1d0313e9d729462.zip |
Adding upstream version 1.4.0.upstream/1.4.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | libpam/pam_modutil_searchkey.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libpam/pam_modutil_searchkey.c b/libpam/pam_modutil_searchkey.c new file mode 100644 index 0000000..ba023e5 --- /dev/null +++ b/libpam/pam_modutil_searchkey.c @@ -0,0 +1,128 @@ +/* + * This file implements the following functions: + * pam_modutil_search_key: + * lookup a value for key in login.defs file or similar key value format + */ + +#include "config.h" + +#include "pam_private.h" +#include "pam_modutil_private.h" +#include <security/pam_ext.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#ifdef USE_ECONF +#include <libeconf.h> +#endif + +#define BUF_SIZE 8192 + +#ifdef USE_ECONF +#define LOGIN_DEFS "/etc/login.defs" + +#ifndef VENDORDIR +#define VENDORDIR NULL +#endif + +static char * +econf_search_key (const char *name, const char *suffix, const char *key) +{ + econf_file *key_file = NULL; + char *val; + + if (econf_readDirs (&key_file, VENDORDIR, SYSCONFDIR, name, suffix, + " \t", "#")) + return NULL; + + if (econf_getStringValue (key_file, NULL, key, &val)) { + econf_free (key_file); + return NULL; + } + + econf_free (key_file); + + return val; +} + +#endif + +/* lookup a value for key in login.defs file or similar key value format */ +char * +pam_modutil_search_key(pam_handle_t *pamh UNUSED, + const char *file_name, + const char *key) +{ + FILE *fp; + char *buf = NULL; + size_t buflen = 0; + char *retval = NULL; + +#ifdef USE_ECONF + if (strcmp (file_name, LOGIN_DEFS) == 0) + return econf_search_key ("login", ".defs", key); +#endif + + fp = fopen(file_name, "r"); + if (NULL == fp) + return NULL; + + while (!feof(fp)) { + char *tmp, *cp; +#if defined(HAVE_GETLINE) + ssize_t n = getline(&buf, &buflen, fp); +#elif defined (HAVE_GETDELIM) + ssize_t n = getdelim(&buf, &buflen, '\n', fp); +#else + ssize_t n; + + if (buf == NULL) { + buflen = BUF_SIZE; + buf = malloc(buflen); + if (buf == NULL) { + fclose(fp); + return NULL; + } + } + buf[0] = '\0'; + if (fgets(buf, buflen - 1, fp) == NULL) + break; + else if (buf != NULL) + n = strlen(buf); + else + n = 0; +#endif /* HAVE_GETLINE / HAVE_GETDELIM */ + cp = buf; + + if (n < 1) + break; + if (cp[n - 1] == '\n') + cp[n - 1] = '\0'; + + tmp = strchr(cp, '#'); /* remove comments */ + if (tmp) + *tmp = '\0'; + while (isspace((int)*cp)) /* remove spaces and tabs */ + ++cp; + if (*cp == '\0') /* ignore empty lines */ + continue; + + tmp = strsep (&cp, " \t="); + if (cp != NULL) + while (isspace((int)*cp) || *cp == '=') + ++cp; + else + cp = buf + n; /* empty string */ + + if (strcasecmp(tmp, key) == 0) { + retval = strdup(cp); + break; + } + } + fclose(fp); + + free(buf); + + return retval; +} |