+++ /dev/null
-/*
- * Copyright (c) 2003-2010 Todd C. Miller <Todd.Miller@courtesan.com>
- *
- * This code is derived from software contributed by Aaron Spangler.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <config.h>
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#ifdef STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-# include <stdlib.h>
-# endif
-#endif /* STDC_HEADERS */
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif /* HAVE_STRING_H */
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif /* HAVE_STRINGS_H */
-#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
-# include <malloc.h>
-#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-#include <ctype.h>
-#include <pwd.h>
-#include <grp.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <netdb.h>
-#ifdef HAVE_LBER_H
-# include <lber.h>
-#endif
-#include <ldap.h>
-#if defined(HAVE_LDAP_SSL_H)
-# include <ldap_ssl.h>
-#elif defined(HAVE_MPS_LDAP_SSL_H)
-# include <mps/ldap_ssl.h>
-#endif
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
-# ifdef HAVE_SASL_SASL_H
-# include <sasl/sasl.h>
-# else
-# include <sasl.h>
-# endif
-# if HAVE_GSS_KRB5_CCACHE_NAME
-# if defined(HAVE_GSSAPI_GSSAPI_KRB5_H)
-# include <gssapi/gssapi.h>
-# include <gssapi/gssapi_krb5.h>
-# elif defined(HAVE_GSSAPI_GSSAPI_H)
-# include <gssapi/gssapi.h>
-# else
-# include <gssapi.h>
-# endif
-# endif
-#endif
-
-#include "sudo.h"
-#include "parse.h"
-#include "lbuf.h"
-
-#ifndef LDAP_OPT_SUCCESS
-# define LDAP_OPT_SUCCESS LDAP_SUCCESS
-#endif
-
-#ifndef LDAPS_PORT
-# define LDAPS_PORT 636
-#endif
-
-#if defined(HAVE_LDAP_SASL_INTERACTIVE_BIND_S) && !defined(LDAP_SASL_QUIET)
-# define LDAP_SASL_QUIET 0
-#endif
-
-#ifndef HAVE_LDAP_UNBIND_EXT_S
-#define ldap_unbind_ext_s(a, b, c) ldap_unbind_s(a)
-#endif
-
-#ifndef HAVE_LDAP_SEARCH_EXT_S
-#define ldap_search_ext_s(a, b, c, d, e, f, g, h, i, j, k) \
- ldap_search_s(a, b, c, d, e, f, k)
-#endif
-
-#define LDAP_FOREACH(var, ld, res) \
- for ((var) = ldap_first_entry((ld), (res)); \
- (var) != NULL; \
- (var) = ldap_next_entry((ld), (var)))
-
-#define DPRINTF(args, level) if (ldap_conf.debug >= level) warningx args
-
-#define CONF_BOOL 0
-#define CONF_INT 1
-#define CONF_STR 2
-#define CONF_LIST_STR 4
-
-#define SUDO_LDAP_SSL 1
-#define SUDO_LDAP_STARTTLS 2
-
-struct ldap_config_table {
- const char *conf_str; /* config file string */
- short type; /* CONF_BOOL, CONF_INT, CONF_STR */
- short connected; /* connection-specific value? */
- int opt_val; /* LDAP_OPT_* (or -1 for sudo internal) */
- void *valp; /* pointer into ldap_conf */
-};
-
-struct ldap_config_list_str {
- struct ldap_config_list_str *next;
- char val[1];
-};
-
-/* ldap configuration structure */
-static struct ldap_config {
- int port;
- int version;
- int debug;
- int ldap_debug;
- int tls_checkpeer;
- int timelimit;
- int bind_timelimit;
- int use_sasl;
- int rootuse_sasl;
- int ssl_mode;
- char *host;
- struct ldap_config_list_str *uri;
- char *binddn;
- char *bindpw;
- char *rootbinddn;
- struct ldap_config_list_str *base;
- char *ssl;
- char *tls_cacertfile;
- char *tls_cacertdir;
- char *tls_random_file;
- char *tls_cipher_suite;
- char *tls_certfile;
- char *tls_keyfile;
- char *sasl_auth_id;
- char *rootsasl_auth_id;
- char *sasl_secprops;
- char *krb5_ccname;
-} ldap_conf;
-
-static struct ldap_config_table ldap_conf_table[] = {
- { "sudoers_debug", CONF_INT, FALSE, -1, &ldap_conf.debug },
- { "host", CONF_STR, FALSE, -1, &ldap_conf.host },
- { "port", CONF_INT, FALSE, -1, &ldap_conf.port },
- { "ssl", CONF_STR, FALSE, -1, &ldap_conf.ssl },
- { "sslpath", CONF_STR, FALSE, -1, &ldap_conf.tls_certfile },
- { "uri", CONF_LIST_STR, FALSE, -1, &ldap_conf.uri },
-#ifdef LDAP_OPT_DEBUG_LEVEL
- { "debug", CONF_INT, FALSE, LDAP_OPT_DEBUG_LEVEL, &ldap_conf.ldap_debug },
-#endif
-#ifdef LDAP_OPT_PROTOCOL_VERSION
- { "ldap_version", CONF_INT, TRUE, LDAP_OPT_PROTOCOL_VERSION,
- &ldap_conf.version },
-#endif
-#ifdef LDAP_OPT_X_TLS_REQUIRE_CERT
- { "tls_checkpeer", CONF_BOOL, FALSE, LDAP_OPT_X_TLS_REQUIRE_CERT,
- &ldap_conf.tls_checkpeer },
-#else
- { "tls_checkpeer", CONF_BOOL, FALSE, -1, &ldap_conf.tls_checkpeer },
-#endif
-#ifdef LDAP_OPT_X_TLS_CACERTFILE
- { "tls_cacertfile", CONF_STR, FALSE, LDAP_OPT_X_TLS_CACERTFILE,
- &ldap_conf.tls_cacertfile },
- { "tls_cacert", CONF_STR, FALSE, LDAP_OPT_X_TLS_CACERTFILE,
- &ldap_conf.tls_cacertfile },
-#endif
-#ifdef LDAP_OPT_X_TLS_CACERTDIR
- { "tls_cacertdir", CONF_STR, FALSE, LDAP_OPT_X_TLS_CACERTDIR,
- &ldap_conf.tls_cacertdir },
-#endif
-#ifdef LDAP_OPT_X_TLS_RANDOM_FILE
- { "tls_randfile", CONF_STR, FALSE, LDAP_OPT_X_TLS_RANDOM_FILE,
- &ldap_conf.tls_random_file },
-#endif
-#ifdef LDAP_OPT_X_TLS_CIPHER_SUITE
- { "tls_ciphers", CONF_STR, FALSE, LDAP_OPT_X_TLS_CIPHER_SUITE,
- &ldap_conf.tls_cipher_suite },
-#endif
-#ifdef LDAP_OPT_X_TLS_CERTFILE
- { "tls_cert", CONF_STR, FALSE, LDAP_OPT_X_TLS_CERTFILE,
- &ldap_conf.tls_certfile },
-#else
- { "tls_cert", CONF_STR, FALSE, -1, &ldap_conf.tls_certfile },
-#endif
-#ifdef LDAP_OPT_X_TLS_KEYFILE
- { "tls_key", CONF_STR, FALSE, LDAP_OPT_X_TLS_KEYFILE,
- &ldap_conf.tls_keyfile },
-#else
- { "tls_key", CONF_STR, FALSE, -1, &ldap_conf.tls_keyfile },
-#endif
-#ifdef LDAP_OPT_NETWORK_TIMEOUT
- { "bind_timelimit", CONF_INT, TRUE, -1 /* needs timeval, set manually */,
- &ldap_conf.bind_timelimit },
-#elif defined(LDAP_X_OPT_CONNECT_TIMEOUT)
- { "bind_timelimit", CONF_INT, TRUE, LDAP_X_OPT_CONNECT_TIMEOUT,
- &ldap_conf.bind_timelimit },
-#endif
- { "timelimit", CONF_INT, TRUE, LDAP_OPT_TIMELIMIT, &ldap_conf.timelimit },
- { "binddn", CONF_STR, FALSE, -1, &ldap_conf.binddn },
- { "bindpw", CONF_STR, FALSE, -1, &ldap_conf.bindpw },
- { "rootbinddn", CONF_STR, FALSE, -1, &ldap_conf.rootbinddn },
- { "sudoers_base", CONF_LIST_STR, FALSE, -1, &ldap_conf.base },
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
- { "use_sasl", CONF_BOOL, FALSE, -1, &ldap_conf.use_sasl },
- { "sasl_auth_id", CONF_STR, FALSE, -1, &ldap_conf.sasl_auth_id },
- { "rootuse_sasl", CONF_BOOL, FALSE, -1, &ldap_conf.rootuse_sasl },
- { "rootsasl_auth_id", CONF_STR, FALSE, -1, &ldap_conf.rootsasl_auth_id },
-# ifdef LDAP_OPT_X_SASL_SECPROPS
- { "sasl_secprops", CONF_STR, TRUE, LDAP_OPT_X_SASL_SECPROPS,
- &ldap_conf.sasl_secprops },
-# endif
- { "krb5_ccname", CONF_STR, FALSE, -1, &ldap_conf.krb5_ccname },
-#endif /* HAVE_LDAP_SASL_INTERACTIVE_BIND_S */
- { NULL }
-};
-
-/* sudo_nss implementation */
-static int sudo_ldap_open __P((struct sudo_nss *nss));
-static int sudo_ldap_close __P((struct sudo_nss *nss));
-static int sudo_ldap_parse __P((struct sudo_nss *nss));
-static int sudo_ldap_setdefs __P((struct sudo_nss *nss));
-static int sudo_ldap_lookup __P((struct sudo_nss *nss, int ret, int pwflag));
-static int sudo_ldap_display_cmnd __P((struct sudo_nss *nss,
- struct passwd *pw));
-static int sudo_ldap_display_defaults __P((struct sudo_nss *nss,
- struct passwd *pw, struct lbuf *lbuf));
-static int sudo_ldap_display_bound_defaults __P((struct sudo_nss *nss,
- struct passwd *pw, struct lbuf *lbuf));
-static int sudo_ldap_display_privs __P((struct sudo_nss *nss,
- struct passwd *pw, struct lbuf *lbuf));
-
-struct sudo_nss sudo_nss_ldap = {
- &sudo_nss_ldap,
- NULL,
- sudo_ldap_open,
- sudo_ldap_close,
- sudo_ldap_parse,
- sudo_ldap_setdefs,
- sudo_ldap_lookup,
- sudo_ldap_display_cmnd,
- sudo_ldap_display_defaults,
- sudo_ldap_display_bound_defaults,
- sudo_ldap_display_privs
-};
-
-#ifdef HAVE_LDAP_CREATE
-/*
- * Rebuild the hosts list and include a specific port for each host.
- * ldap_create() does not take a default port parameter so we must
- * append one if we want something other than LDAP_PORT.
- */
-static void
-sudo_ldap_conf_add_ports()
-{
-
- char *host, *port, defport[13];
- char hostbuf[LINE_MAX * 2];
-
- hostbuf[0] = '\0';
- if (snprintf(defport, sizeof(defport), ":%d", ldap_conf.port) >= sizeof(defport))
- errorx(1, "sudo_ldap_conf_add_ports: port too large");
-
- for ((host = strtok(ldap_conf.host, " \t")); host; (host = strtok(NULL, " \t"))) {
- if (hostbuf[0] != '\0') {
- if (strlcat(hostbuf, " ", sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
- }
-
- if (strlcat(hostbuf, host, sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
- /* Append port if there is not one already. */
- if ((port = strrchr(host, ':')) == NULL ||
- !isdigit((unsigned char)port[1])) {
- if (strlcat(hostbuf, defport, sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
- }
- }
-
- free(ldap_conf.host);
- ldap_conf.host = estrdup(hostbuf);
- return;
-
-toobig:
- errorx(1, "sudo_ldap_conf_add_ports: out of space expanding hostbuf");
-}
-#endif
-
-#ifndef HAVE_LDAP_INITIALIZE
-/*
- * For each uri, convert to host:port pairs. For ldaps:// enable SSL
- * Accepts: uris of the form ldap:/// or ldap://hostname:portnum/
- * where the trailing slash is optional.
- */
-static int
-sudo_ldap_parse_uri(uri_list)
- const struct ldap_config_list_str *uri_list;
-{
- char *buf, *uri, *host, *cp, *port;
- char hostbuf[LINE_MAX];
- int nldap = 0, nldaps = 0;
- int rc = -1;
-
- do {
- buf = estrdup(uri_list->val);
- hostbuf[0] = '\0';
- for ((uri = strtok(buf, " \t")); uri != NULL; (uri = strtok(NULL, " \t"))) {
- if (strncasecmp(uri, "ldap://", 7) == 0) {
- nldap++;
- host = uri + 7;
- } else if (strncasecmp(uri, "ldaps://", 8) == 0) {
- nldaps++;
- host = uri + 8;
- } else {
- warningx("unsupported LDAP uri type: %s", uri);
- goto done;
- }
-
- /* trim optional trailing slash */
- if ((cp = strrchr(host, '/')) != NULL && cp[1] == '\0') {
- *cp = '\0';
- }
-
- if (hostbuf[0] != '\0') {
- if (strlcat(hostbuf, " ", sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
- }
-
- if (*host == '\0')
- host = "localhost"; /* no host specified, use localhost */
-
- if (strlcat(hostbuf, host, sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
-
- /* If using SSL and no port specified, add port 636 */
- if (nldaps) {
- if ((port = strrchr(host, ':')) == NULL ||
- !isdigit((unsigned char)port[1]))
- if (strlcat(hostbuf, ":636", sizeof(hostbuf)) >= sizeof(hostbuf))
- goto toobig;
- }
- }
- if (hostbuf[0] == '\0') {
- warningx("invalid uri: %s", uri_list);
- goto done;
- }
-
- if (nldaps != 0) {
- if (nldap != 0) {
- warningx("cannot mix ldap and ldaps URIs");
- goto done;
- }
- if (ldap_conf.ssl_mode == SUDO_LDAP_STARTTLS) {
- warningx("cannot mix ldaps and starttls");
- goto done;
- }
- ldap_conf.ssl_mode = SUDO_LDAP_SSL;
- }
-
- free(ldap_conf.host);
- ldap_conf.host = estrdup(hostbuf);
- efree(buf);
- } while ((uri_list = uri_list->next));
-
- buf = NULL;
- rc = 0;
-
-done:
- efree(buf);
- return(rc);
-
-toobig:
- errorx(1, "sudo_ldap_parse_uri: out of space building hostbuf");
-}
-#else
-static char *
-sudo_ldap_join_uri(uri_list)
- struct ldap_config_list_str *uri_list;
-{
- struct ldap_config_list_str *uri;
- size_t len = 0;
- char *buf, *cp;
-
- /* Usually just a single entry. */
- if (uri_list->next == NULL)
- return(estrdup(uri_list->val));
-
- for (uri = uri_list; uri != NULL; uri = uri->next) {
- len += strlen(uri->val) + 1;
- }
- buf = cp = emalloc(len);
- buf[0] = '\0';
- for (uri = uri_list; uri != NULL; uri = uri->next) {
- cp += strlcpy(cp, uri->val, len - (cp - buf));
- *cp++ = ' ';
- }
- cp[-1] = '\0';
- return(buf);
-}
-#endif /* HAVE_LDAP_INITIALIZE */
-
-static int
-sudo_ldap_init(ldp, host, port)
- LDAP **ldp;
- const char *host;
- int port;
-{
- LDAP *ld = NULL;
- int rc = LDAP_CONNECT_ERROR;
-
-#ifdef HAVE_LDAPSSL_INIT
- if (ldap_conf.ssl_mode == SUDO_LDAP_SSL) {
- DPRINTF(("ldapssl_clientauth_init(%s, %s)",
- ldap_conf.tls_certfile ? ldap_conf.tls_certfile : "NULL",
- ldap_conf.tls_keyfile ? ldap_conf.tls_keyfile : "NULL"), 2);
- rc = ldapssl_clientauth_init(ldap_conf.tls_certfile, NULL,
- ldap_conf.tls_keyfile != NULL, ldap_conf.tls_keyfile, NULL);
- /*
- * Mozilla-derived SDKs have a bug starting with version 5.0
- * where the path can no longer be a file name and must be a dir.
- */
- if (rc != LDAP_SUCCESS) {
- char *cp;
- if (ldap_conf.tls_certfile) {
- cp = strrchr(ldap_conf.tls_certfile, '/');
- if (cp != NULL && strncmp(cp + 1, "cert", 4) == 0)
- *cp = '\0';
- }
- if (ldap_conf.tls_keyfile) {
- cp = strrchr(ldap_conf.tls_keyfile, '/');
- if (cp != NULL && strncmp(cp + 1, "key", 3) == 0)
- *cp = '\0';
- }
- DPRINTF(("ldapssl_clientauth_init(%s, %s)",
- ldap_conf.tls_certfile ? ldap_conf.tls_certfile : "NULL",
- ldap_conf.tls_keyfile ? ldap_conf.tls_keyfile : "NULL"), 2);
- rc = ldapssl_clientauth_init(ldap_conf.tls_certfile, NULL,
- ldap_conf.tls_keyfile != NULL, ldap_conf.tls_keyfile, NULL);
- if (rc != LDAP_SUCCESS) {
- warningx("unable to initialize SSL cert and key db: %s",
- ldapssl_err2string(rc));
- goto done;
- }
- }
-
- DPRINTF(("ldapssl_init(%s, %d, 1)", host, port), 2);
- if ((ld = ldapssl_init(host, port, 1)) != NULL)
- rc = LDAP_SUCCESS;
- } else
-#endif
- {
-#ifdef HAVE_LDAP_CREATE
- DPRINTF(("ldap_create()"), 2);
- if ((rc = ldap_create(&ld)) != LDAP_SUCCESS)
- goto done;
- DPRINTF(("ldap_set_option(LDAP_OPT_HOST_NAME, %s)", host), 2);
- rc = ldap_set_option(ld, LDAP_OPT_HOST_NAME, host);
-#else
- DPRINTF(("ldap_init(%s, %d)", host, port), 2);
- if ((ld = ldap_init(host, port)) != NULL)
- rc = LDAP_SUCCESS;
-#endif
- }
-
-done:
- *ldp = ld;
- return(rc);
-}
-
-/*
- * Walk through search results and return TRUE if we have a matching
- * netgroup, else FALSE.
- */
-static int
-sudo_ldap_check_user_netgroup(ld, entry, user)
- LDAP *ld;
- LDAPMessage *entry;
- char *user;
-{
- struct berval **bv, **p;
- char *val;
- int ret = FALSE;
-
- if (!entry)
- return(ret);
-
- /* get the values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoUser");
- if (bv == NULL)
- return(ret);
-
- /* walk through values */
- for (p = bv; *p != NULL && !ret; p++) {
- val = (*p)->bv_val;
- /* match any */
- if (netgr_matches(val, NULL, NULL, user))
- ret = TRUE;
- DPRINTF(("ldap sudoUser netgroup '%s' ... %s", val,
- ret ? "MATCH!" : "not"), 2);
- }
-
- ldap_value_free_len(bv); /* cleanup */
-
- return(ret);
-}
-
-/*
- * Walk through search results and return TRUE if we have a
- * host match, else FALSE.
- */
-static int
-sudo_ldap_check_host(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
- struct berval **bv, **p;
- char *val;
- int ret = FALSE;
-
- if (!entry)
- return(ret);
-
- /* get the values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoHost");
- if (bv == NULL)
- return(ret);
-
- /* walk through values */
- for (p = bv; *p != NULL && !ret; p++) {
- val = (*p)->bv_val;
- /* match any or address or netgroup or hostname */
- if (!strcmp(val, "ALL") || addr_matches(val) ||
- netgr_matches(val, user_host, user_shost, NULL) ||
- hostname_matches(user_shost, user_host, val))
- ret = TRUE;
- DPRINTF(("ldap sudoHost '%s' ... %s", val,
- ret ? "MATCH!" : "not"), 2);
- }
-
- ldap_value_free_len(bv); /* cleanup */
-
- return(ret);
-}
-
-static int
-sudo_ldap_check_runas_user(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
- struct berval **bv, **p;
- char *val;
- int ret = FALSE;
-
- if (!runas_pw)
- return(UNSPEC);
-
- /* get the runas user from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoRunAsUser");
- if (bv == NULL)
- bv = ldap_get_values_len(ld, entry, "sudoRunAs"); /* old style */
-
- /*
- * BUG:
- *
- * if runas is not specified on the command line, the only information
- * as to which user to run as is in the runas_default option. We should
- * check to see if we have the local option present. Unfortunately we
- * don't parse these options until after this routine says yes or no.
- * The query has already returned, so we could peek at the attribute
- * values here though.
- *
- * For now just require users to always use -u option unless its set
- * in the global defaults. This behaviour is no different than the global
- * /etc/sudoers.
- *
- * Sigh - maybe add this feature later
- */
-
- /*
- * If there are no runas entries, match runas_default against
- * what the user specified on the command line.
- */
- if (bv == NULL)
- return(!strcasecmp(runas_pw->pw_name, def_runas_default));
-
- /* walk through values returned, looking for a match */
- for (p = bv; *p != NULL && !ret; p++) {
- val = (*p)->bv_val;
- switch (val[0]) {
- case '+':
- if (netgr_matches(val, NULL, NULL, runas_pw->pw_name))
- ret = TRUE;
- break;
- case '%':
- if (usergr_matches(val, runas_pw->pw_name, runas_pw))
- ret = TRUE;
- break;
- case 'A':
- if (strcmp(val, "ALL") == 0) {
- ret = TRUE;
- break;
- }
- /* FALLTHROUGH */
- default:
- if (strcasecmp(val, runas_pw->pw_name) == 0)
- ret = TRUE;
- break;
- }
- DPRINTF(("ldap sudoRunAsUser '%s' ... %s", val,
- ret ? "MATCH!" : "not"), 2);
- }
-
- ldap_value_free_len(bv); /* cleanup */
-
- return(ret);
-}
-
-static int
-sudo_ldap_check_runas_group(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
- struct berval **bv, **p;
- char *val;
- int ret = FALSE;
-
- /* runas_gr is only set if the user specified the -g flag */
- if (!runas_gr)
- return(UNSPEC);
-
- /* get the values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoRunAsGroup");
- if (bv == NULL)
- return(ret);
-
- /* walk through values returned, looking for a match */
- for (p = bv; *p != NULL && !ret; p++) {
- val = (*p)->bv_val;
- if (strcmp(val, "ALL") == 0 || group_matches(val, runas_gr))
- ret = TRUE;
- DPRINTF(("ldap sudoRunAsGroup '%s' ... %s", val,
- ret ? "MATCH!" : "not"), 2);
- }
-
- ldap_value_free_len(bv); /* cleanup */
-
- return(ret);
-}
-
-/*
- * Walk through search results and return TRUE if we have a runas match,
- * else FALSE. RunAs info is optional.
- */
-static int
-sudo_ldap_check_runas(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
- int ret;
-
- if (!entry)
- return(FALSE);
-
- ret = sudo_ldap_check_runas_user(ld, entry) != FALSE &&
- sudo_ldap_check_runas_group(ld, entry) != FALSE;
-
- return(ret);
-}
-
-/*
- * Walk through search results and return TRUE if we have a command match,
- * FALSE if disallowed and UNSPEC if not matched.
- */
-static int
-sudo_ldap_check_command(ld, entry, setenv_implied)
- LDAP *ld;
- LDAPMessage *entry;
- int *setenv_implied;
-{
- struct berval **bv, **p;
- char *allowed_cmnd, *allowed_args, *val;
- int foundbang, ret = UNSPEC;
-
- if (!entry)
- return(ret);
-
- bv = ldap_get_values_len(ld, entry, "sudoCommand");
- if (bv == NULL)
- return(ret);
-
- for (p = bv; *p != NULL && ret != FALSE; p++) {
- val = (*p)->bv_val;
- /* Match against ALL ? */
- if (!strcmp(val, "ALL")) {
- ret = TRUE;
- if (setenv_implied != NULL)
- *setenv_implied = TRUE;
- DPRINTF(("ldap sudoCommand '%s' ... MATCH!", val), 2);
- continue;
- }
-
- /* check for !command */
- if (*val == '!') {
- foundbang = TRUE;
- allowed_cmnd = estrdup(1 + val); /* !command */
- } else {
- foundbang = FALSE;
- allowed_cmnd = estrdup(val); /* command */
- }
-
- /* split optional args away from command */
- allowed_args = strchr(allowed_cmnd, ' ');
- if (allowed_args)
- *allowed_args++ = '\0';
-
- /* check the command like normal */
- if (command_matches(allowed_cmnd, allowed_args)) {
- /*
- * If allowed (no bang) set ret but keep on checking.
- * If disallowed (bang), exit loop.
- */
- ret = foundbang ? FALSE : TRUE;
- }
- DPRINTF(("ldap sudoCommand '%s' ... %s", val,
- ret == TRUE ? "MATCH!" : "not"), 2);
-
- efree(allowed_cmnd); /* cleanup */
- }
-
- ldap_value_free_len(bv); /* more cleanup */
-
- return(ret);
-}
-
-/*
- * Search for boolean "option" in sudoOption.
- * Returns TRUE if found and allowed, FALSE if negated, else UNSPEC.
- */
-static int
-sudo_ldap_check_bool(ld, entry, option)
- LDAP *ld;
- LDAPMessage *entry;
- char *option;
-{
- struct berval **bv, **p;
- char ch, *var;
- int ret = UNSPEC;
-
- if (entry == NULL)
- return(UNSPEC);
-
- bv = ldap_get_values_len(ld, entry, "sudoOption");
- if (bv == NULL)
- return(ret);
-
- /* walk through options */
- for (p = bv; *p != NULL; p++) {
- var = (*p)->bv_val;;
- DPRINTF(("ldap sudoOption: '%s'", var), 2);
-
- if ((ch = *var) == '!')
- var++;
- if (strcmp(var, option) == 0)
- ret = (ch != '!');
- }
-
- ldap_value_free_len(bv);
-
- return(ret);
-}
-
-/*
- * Read sudoOption and modify the defaults as we go. This is used once
- * from the cn=defaults entry and also once when a final sudoRole is matched.
- */
-static void
-sudo_ldap_parse_options(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
- struct berval **bv, **p;
- char op, *var, *val;
-
- if (entry == NULL)
- return;
-
- bv = ldap_get_values_len(ld, entry, "sudoOption");
- if (bv == NULL)
- return;
-
- /* walk through options */
- for (p = bv; *p != NULL; p++) {
- var = estrdup((*p)->bv_val);
- DPRINTF(("ldap sudoOption: '%s'", var), 2);
-
- /* check for equals sign past first char */
- val = strchr(var, '=');
- if (val > var) {
- *val++ = '\0'; /* split on = and truncate var */
- op = *(val - 2); /* peek for += or -= cases */
- if (op == '+' || op == '-') {
- *(val - 2) = '\0'; /* found, remove extra char */
- /* case var+=val or var-=val */
- set_default(var, val, (int) op);
- } else {
- /* case var=val */
- set_default(var, val, TRUE);
- }
- } else if (*var == '!') {
- /* case !var Boolean False */
- set_default(var + 1, NULL, FALSE);
- } else {
- /* case var Boolean True */
- set_default(var, NULL, TRUE);
- }
- efree(var);
- }
-
- ldap_value_free_len(bv);
-}
-
-/*
- * builds together a filter to check against ldap
- */
-static char *
-sudo_ldap_build_pass1(pw)
- struct passwd *pw;
-{
- struct group *grp;
- size_t sz;
- char *buf;
- int i;
-
- /* Start with (|(sudoUser=USERNAME)(sudoUser=ALL)) + NUL */
- sz = 29 + strlen(pw->pw_name);
-
- /* Add space for groups */
- if ((grp = sudo_getgrgid(pw->pw_gid)) != NULL)
- sz += 12 + strlen(grp->gr_name); /* primary group */
- for (i = 0; i < user_ngroups; i++) {
- if (user_groups[i] == pw->pw_gid)
- continue;
- if ((grp = sudo_getgrgid(user_groups[i])) != NULL)
- sz += 12 + strlen(grp->gr_name); /* supplementary group */
- }
- buf = emalloc(sz);
-
- /* Global OR + sudoUser=user_name filter */
- (void) strlcpy(buf, "(|(sudoUser=", sz);
- (void) strlcat(buf, pw->pw_name, sz);
- (void) strlcat(buf, ")", sz);
-
- /* Append primary group */
- if ((grp = sudo_getgrgid(pw->pw_gid)) != NULL) {
- (void) strlcat(buf, "(sudoUser=%", sz);
- (void) strlcat(buf, grp->gr_name, sz);
- (void) strlcat(buf, ")", sz);
- }
-
- /* Append supplementary groups */
- for (i = 0; i < user_ngroups; i++) {
- if (user_groups[i] == pw->pw_gid)
- continue;
- if ((grp = sudo_getgrgid(user_groups[i])) != NULL) {
- (void) strlcat(buf, "(sudoUser=%", sz);
- (void) strlcat(buf, grp->gr_name, sz);
- (void) strlcat(buf, ")", sz);
- }
- }
-
- /* Add ALL to list and end the global OR */
- if (strlcat(buf, "(sudoUser=ALL))", sz) >= sz)
- errorx(1, "sudo_ldap_build_pass1 allocation mismatch");
-
- return(buf);
-}
-
-/*
- * Map yes/true/on to TRUE, no/false/off to FALSE, else -1
- */
-static int
-_atobool(s)
- const char *s;
-{
- switch (*s) {
- case 'y':
- case 'Y':
- if (strcasecmp(s, "yes") == 0)
- return(TRUE);
- break;
- case 't':
- case 'T':
- if (strcasecmp(s, "true") == 0)
- return(TRUE);
- break;
- case 'o':
- case 'O':
- if (strcasecmp(s, "on") == 0)
- return(TRUE);
- if (strcasecmp(s, "off") == 0)
- return(FALSE);
- break;
- case 'n':
- case 'N':
- if (strcasecmp(s, "no") == 0)
- return(FALSE);
- break;
- case 'f':
- case 'F':
- if (strcasecmp(s, "false") == 0)
- return(FALSE);
- break;
- }
- return(-1);
-}
-
-static void
-sudo_ldap_read_secret(path)
- const char *path;
-{
- FILE *fp;
- char buf[LINE_MAX], *cp;
-
- if ((fp = fopen(_PATH_LDAP_SECRET, "r")) != NULL) {
- if (fgets(buf, sizeof(buf), fp) != NULL) {
- if ((cp = strchr(buf, '\n')) != NULL)
- *cp = '\0';
- /* copy to bindpw and binddn */
- efree(ldap_conf.bindpw);
- ldap_conf.bindpw = estrdup(buf);
- efree(ldap_conf.binddn);
- ldap_conf.binddn = ldap_conf.rootbinddn;
- ldap_conf.rootbinddn = NULL;
- }
- fclose(fp);
- }
-}
-
-static int
-sudo_ldap_read_config()
-{
- FILE *fp;
- char *cp, *keyword, *value;
- struct ldap_config_table *cur;
-
- /* defaults */
- ldap_conf.version = 3;
- ldap_conf.port = -1;
- ldap_conf.tls_checkpeer = -1;
- ldap_conf.timelimit = -1;
- ldap_conf.bind_timelimit = -1;
- ldap_conf.use_sasl = -1;
- ldap_conf.rootuse_sasl = -1;
-
- if ((fp = fopen(_PATH_LDAP_CONF, "r")) == NULL)
- return(FALSE);
-
- while ((cp = sudo_parseln(fp)) != NULL) {
- if (*cp == '\0')
- continue; /* skip empty line */
-
- /* split into keyword and value */
- keyword = cp;
- while (*cp && !isblank((unsigned char) *cp))
- cp++;
- if (*cp)
- *cp++ = '\0'; /* terminate keyword */
-
- /* skip whitespace before value */
- while (isblank((unsigned char) *cp))
- cp++;
- value = cp;
-
- /* Look up keyword in config table. */
- for (cur = ldap_conf_table; cur->conf_str != NULL; cur++) {
- if (strcasecmp(keyword, cur->conf_str) == 0) {
- switch (cur->type) {
- case CONF_BOOL:
- *(int *)(cur->valp) = _atobool(value);
- break;
- case CONF_INT:
- *(int *)(cur->valp) = atoi(value);
- break;
- case CONF_STR:
- efree(*(char **)(cur->valp));
- *(char **)(cur->valp) = estrdup(value);
- break;
- case CONF_LIST_STR:
- {
- struct ldap_config_list_str **p;
- size_t len = strlen(value);
-
- if (len > 0) {
- p = (struct ldap_config_list_str **)cur->valp;
- while (*p != NULL)
- p = &(*p)->next;
- *p = emalloc(sizeof(struct ldap_config_list_str) + len);
- memcpy((*p)->val, value, len + 1);
- (*p)->next = NULL;
- }
- }
- break;
- }
- break;
- }
- }
- }
- fclose(fp);
-
- if (!ldap_conf.host)
- ldap_conf.host = estrdup("localhost");
-
- if (ldap_conf.bind_timelimit > 0)
- ldap_conf.bind_timelimit *= 1000; /* convert to ms */
-
- if (ldap_conf.debug > 1) {
- fprintf(stderr, "LDAP Config Summary\n");
- fprintf(stderr, "===================\n");
- if (ldap_conf.uri) {
- struct ldap_config_list_str *uri = ldap_conf.uri;
-
- do {
- fprintf(stderr, "uri %s\n", uri->val);
- } while ((uri = uri->next) != NULL);
- } else {
- fprintf(stderr, "host %s\n", ldap_conf.host ?
- ldap_conf.host : "(NONE)");
- fprintf(stderr, "port %d\n", ldap_conf.port);
- }
- fprintf(stderr, "ldap_version %d\n", ldap_conf.version);
- if (ldap_conf.base) {
- struct ldap_config_list_str *base = ldap_conf.base;
-
- do {
- fprintf(stderr, "sudoers_base %s\n", base->val);
- } while ((base = base->next) != NULL);
- } else {
- fprintf(stderr, "sudoers_base %s\n",
- "(NONE) <---Sudo will ignore ldap)");
- }
- fprintf(stderr, "binddn %s\n", ldap_conf.binddn ?
- ldap_conf.binddn : "(anonymous)");
- fprintf(stderr, "bindpw %s\n", ldap_conf.bindpw ?
- ldap_conf.bindpw : "(anonymous)");
- if (ldap_conf.bind_timelimit > 0)
- fprintf(stderr, "bind_timelimit %d\n", ldap_conf.bind_timelimit);
- if (ldap_conf.timelimit > 0)
- fprintf(stderr, "timelimit %d\n", ldap_conf.timelimit);
- fprintf(stderr, "ssl %s\n", ldap_conf.ssl ?
- ldap_conf.ssl : "(no)");
- if (ldap_conf.tls_checkpeer != -1)
- fprintf(stderr, "tls_checkpeer %s\n", ldap_conf.tls_checkpeer ?
- "(yes)" : "(no)");
- if (ldap_conf.tls_cacertfile != NULL)
- fprintf(stderr, "tls_cacertfile %s\n", ldap_conf.tls_cacertfile);
- if (ldap_conf.tls_cacertdir != NULL)
- fprintf(stderr, "tls_cacertdir %s\n", ldap_conf.tls_cacertdir);
- if (ldap_conf.tls_random_file != NULL)
- fprintf(stderr, "tls_random_file %s\n", ldap_conf.tls_random_file);
- if (ldap_conf.tls_cipher_suite != NULL)
- fprintf(stderr, "tls_cipher_suite %s\n", ldap_conf.tls_cipher_suite);
- if (ldap_conf.tls_certfile != NULL)
- fprintf(stderr, "tls_certfile %s\n", ldap_conf.tls_certfile);
- if (ldap_conf.tls_keyfile != NULL)
- fprintf(stderr, "tls_keyfile %s\n", ldap_conf.tls_keyfile);
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
- if (ldap_conf.use_sasl != -1) {
- fprintf(stderr, "use_sasl %s\n",
- ldap_conf.use_sasl ? "yes" : "no");
- fprintf(stderr, "sasl_auth_id %s\n", ldap_conf.sasl_auth_id ?
- ldap_conf.sasl_auth_id : "(NONE)");
- fprintf(stderr, "rootuse_sasl %d\n", ldap_conf.rootuse_sasl);
- fprintf(stderr, "rootsasl_auth_id %s\n", ldap_conf.rootsasl_auth_id ?
- ldap_conf.rootsasl_auth_id : "(NONE)");
- fprintf(stderr, "sasl_secprops %s\n", ldap_conf.sasl_secprops ?
- ldap_conf.sasl_secprops : "(NONE)");
- fprintf(stderr, "krb5_ccname %s\n", ldap_conf.krb5_ccname ?
- ldap_conf.krb5_ccname : "(NONE)");
- }
-#endif
- fprintf(stderr, "===================\n");
- }
- if (!ldap_conf.base)
- return(FALSE); /* if no base is defined, ignore LDAP */
-
- /*
- * Interpret SSL option
- */
- if (ldap_conf.ssl != NULL) {
- if (strcasecmp(ldap_conf.ssl, "start_tls") == 0)
- ldap_conf.ssl_mode = SUDO_LDAP_STARTTLS;
- else if (_atobool(ldap_conf.ssl))
- ldap_conf.ssl_mode = SUDO_LDAP_SSL;
- }
-
-#if defined(HAVE_LDAPSSL_SET_STRENGTH) && !defined(LDAP_OPT_X_TLS_REQUIRE_CERT)
- if (ldap_conf.tls_checkpeer != -1) {
- ldapssl_set_strength(NULL,
- ldap_conf.tls_checkpeer ? LDAPSSL_AUTH_CERT : LDAPSSL_AUTH_WEAK);
- }
-#endif
-
-#ifndef HAVE_LDAP_INITIALIZE
- /* Convert uri list to host list if no ldap_initialize(). */
- if (ldap_conf.uri) {
- struct ldap_config_list_str *uri = ldap_conf.uri;
- if (sudo_ldap_parse_uri(uri) != 0)
- return(FALSE);
- do {
- ldap_conf.uri = uri->next;
- efree(uri);
- } while ((uri = ldap_conf.uri));
- ldap_conf.port = LDAP_PORT;
- }
-#endif
-
- if (!ldap_conf.uri) {
- /* Use port 389 for plaintext LDAP and port 636 for SSL LDAP */
- if (ldap_conf.port < 0)
- ldap_conf.port =
- ldap_conf.ssl_mode == SUDO_LDAP_SSL ? LDAPS_PORT : LDAP_PORT;
-
-#ifdef HAVE_LDAP_CREATE
- /*
- * Cannot specify port directly to ldap_create(), each host must
- * include :port to override the default.
- */
- if (ldap_conf.port != LDAP_PORT)
- sudo_ldap_conf_add_ports();
-#endif
- }
-
- /* If rootbinddn set, read in /etc/ldap.secret if it exists. */
- if (ldap_conf.rootbinddn)
- sudo_ldap_read_secret(_PATH_LDAP_SECRET);
-
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
- /*
- * Make sure we can open the file specified by krb5_ccname.
- */
- if (ldap_conf.krb5_ccname != NULL) {
- if (strncasecmp(ldap_conf.krb5_ccname, "FILE:", 5) == 0 ||
- strncasecmp(ldap_conf.krb5_ccname, "WRFILE:", 7) == 0) {
- value = ldap_conf.krb5_ccname +
- (ldap_conf.krb5_ccname[4] == ':' ? 5 : 7);
- if ((fp = fopen(value, "r")) != NULL) {
- DPRINTF(("using krb5 credential cache: %s", value), 1);
- fclose(fp);
- } else {
- /* Can't open it, just ignore the entry. */
- DPRINTF(("unable to open krb5 credential cache: %s", value), 1);
- efree(ldap_conf.krb5_ccname);
- ldap_conf.krb5_ccname = NULL;
- }
- }
- }
-#endif
- return(TRUE);
-}
-
-/*
- * Extract the dn from an entry and return the first rdn from it.
- */
-static char *
-sudo_ldap_get_first_rdn(ld, entry)
- LDAP *ld;
- LDAPMessage *entry;
-{
-#ifdef HAVE_LDAP_STR2DN
- char *dn, *rdn = NULL;
- LDAPDN tmpDN;
-
- if ((dn = ldap_get_dn(ld, entry)) == NULL)
- return(NULL);
- if (ldap_str2dn(dn, &tmpDN, LDAP_DN_FORMAT_LDAP) == LDAP_SUCCESS) {
- ldap_rdn2str(tmpDN[0], &rdn, LDAP_DN_FORMAT_UFN);
- ldap_dnfree(tmpDN);
- }
- ldap_memfree(dn);
- return(rdn);
-#else
- char *dn, **edn;
-
- if ((dn = ldap_get_dn(ld, entry)) == NULL)
- return(NULL);
- edn = ldap_explode_dn(dn, 1);
- ldap_memfree(dn);
- return(edn ? edn[0] : NULL);
-#endif
-}
-
-/*
- * Fetch and display the global Options.
- */
-static int
-sudo_ldap_display_defaults(nss, pw, lbuf)
- struct sudo_nss *nss;
- struct passwd *pw;
- struct lbuf *lbuf;
-{
- struct berval **bv, **p;
- struct ldap_config_list_str *base;
- LDAP *ld = (LDAP *) nss->handle;
- LDAPMessage *entry, *result;
- char *prefix;
- int rc, count = 0;
-
- if (ld == NULL)
- goto done;
-
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE,
- "cn=defaults", NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc == LDAP_SUCCESS && (entry = ldap_first_entry(ld, result))) {
- bv = ldap_get_values_len(ld, entry, "sudoOption");
- if (bv != NULL) {
- if (lbuf->len == 0 || isspace((unsigned char)lbuf->buf[lbuf->len - 1]))
- prefix = " ";
- else
- prefix = ", ";
- for (p = bv; *p != NULL; p++) {
- lbuf_append(lbuf, prefix, (*p)->bv_val, NULL);
- prefix = ", ";
- count++;
- }
- ldap_value_free_len(bv);
- }
- }
- if (result)
- ldap_msgfree(result);
- }
-done:
- return(count);
-}
-
-/*
- * STUB
- */
-static int
-sudo_ldap_display_bound_defaults(nss, pw, lbuf)
- struct sudo_nss *nss;
- struct passwd *pw;
- struct lbuf *lbuf;
-{
- return(0);
-}
-
-/*
- * Print a record in the short form, ala file sudoers.
- */
-static int
-sudo_ldap_display_entry_short(ld, entry, lbuf)
- LDAP *ld;
- LDAPMessage *entry;
- struct lbuf *lbuf;
-{
- struct berval **bv, **p;
- int count = 0;
-
- lbuf_append(lbuf, " (", NULL);
-
- /* get the RunAsUser Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoRunAsUser");
- if (bv == NULL)
- bv = ldap_get_values_len(ld, entry, "sudoRunAs");
- if (bv != NULL) {
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- }
- ldap_value_free_len(bv);
- } else
- lbuf_append(lbuf, def_runas_default, NULL);
-
- /* get the RunAsGroup Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoRunAsGroup");
- if (bv != NULL) {
- lbuf_append(lbuf, " : ", NULL);
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- }
- ldap_value_free_len(bv);
- }
- lbuf_append(lbuf, ") ", NULL);
-
- /* get the Option Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoOption");
- if (bv != NULL) {
- char *cp, *tag;
-
- for (p = bv; *p != NULL; p++) {
- cp = (*p)->bv_val;
- if (*cp == '!')
- cp++;
- tag = NULL;
- if (strcmp(cp, "authenticate") == 0)
- tag = (*p)->bv_val[0] == '!' ?
- "NOPASSWD: " : "PASSWD: ";
- else if (strcmp(cp, "noexec") == 0)
- tag = (*p)->bv_val[0] == '!' ?
- "EXEC: " : "NOEXEC: ";
- else if (strcmp(cp, "setenv") == 0)
- tag = (*p)->bv_val[0] == '!' ?
- "NOSETENV: " : "SETENV: ";
- if (tag != NULL)
- lbuf_append(lbuf, tag, NULL);
- /* XXX - ignores other options */
- }
- ldap_value_free_len(bv);
- }
-
- /* get the Command Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoCommand");
- if (bv != NULL) {
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- count++;
- }
- ldap_value_free_len(bv);
- }
- lbuf_append(lbuf, "\n", NULL);
-
- return(count);
-}
-
-/*
- * Print a record in the long form.
- */
-static int
-sudo_ldap_display_entry_long(ld, entry, lbuf)
- LDAP *ld;
- LDAPMessage *entry;
- struct lbuf *lbuf;
-{
- struct berval **bv, **p;
- char *rdn;
- int count = 0;
-
- /* extract the dn, only show the first rdn */
- rdn = sudo_ldap_get_first_rdn(ld, entry);
- lbuf_append(lbuf, "\nLDAP Role: ", rdn ? rdn : "UNKNOWN", "\n", NULL);
- if (rdn)
- ldap_memfree(rdn);
-
- /* get the RunAsUser Values from the entry */
- lbuf_append(lbuf, " RunAsUsers: ", NULL);
- bv = ldap_get_values_len(ld, entry, "sudoRunAsUser");
- if (bv == NULL)
- bv = ldap_get_values_len(ld, entry, "sudoRunAs");
- if (bv != NULL) {
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- }
- ldap_value_free_len(bv);
- } else
- lbuf_append(lbuf, def_runas_default, NULL);
- lbuf_append(lbuf, "\n", NULL);
-
- /* get the RunAsGroup Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoRunAsGroup");
- if (bv != NULL) {
- lbuf_append(lbuf, " RunAsGroups: ", NULL);
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- }
- ldap_value_free_len(bv);
- lbuf_append(lbuf, "\n", NULL);
- }
-
- /* get the Option Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoOption");
- if (bv != NULL) {
- lbuf_append(lbuf, " Options: ", NULL);
- for (p = bv; *p != NULL; p++) {
- if (p != bv)
- lbuf_append(lbuf, ", ", NULL);
- lbuf_append(lbuf, (*p)->bv_val, NULL);
- }
- ldap_value_free_len(bv);
- lbuf_append(lbuf, "\n", NULL);
- }
-
- /* get the Command Values from the entry */
- bv = ldap_get_values_len(ld, entry, "sudoCommand");
- if (bv != NULL) {
- lbuf_append(lbuf, " Commands:\n", NULL);
- for (p = bv; *p != NULL; p++) {
- lbuf_append(lbuf, "\t", (*p)->bv_val, "\n", NULL);
- count++;
- }
- ldap_value_free_len(bv);
- }
-
- return(count);
-}
-
-/*
- * Like sudo_ldap_lookup(), except we just print entries.
- */
-static int
-sudo_ldap_display_privs(nss, pw, lbuf)
- struct sudo_nss *nss;
- struct passwd *pw;
- struct lbuf *lbuf;
-{
- struct ldap_config_list_str *base;
- LDAP *ld = (LDAP *) nss->handle;
- LDAPMessage *entry, *result;
- char *filt;
- int rc, do_netgr, count = 0;
-
- if (ld == NULL)
- goto done;
-
- /*
- * Okay - time to search for anything that matches this user
- * Lets limit it to only two queries of the LDAP server
- *
- * The first pass will look by the username, groups, and
- * the keyword ALL. We will then inspect the results that
- * came back from the query. We don't need to inspect the
- * sudoUser in this pass since the LDAP server already scanned
- * it for us.
- *
- * The second pass will return all the entries that contain
- * user netgroups. Then we take the netgroups returned and
- * try to match them against the username.
- */
- for (do_netgr = 0; do_netgr < 2; do_netgr++) {
- filt = do_netgr ? estrdup("sudoUser=+*") : sudo_ldap_build_pass1(pw);
- DPRINTF(("ldap search '%s'", filt), 1);
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE, filt,
- NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc != LDAP_SUCCESS)
- continue; /* no entries for this pass */
-
- /* print each matching entry */
- LDAP_FOREACH(entry, ld, result) {
- if ((!do_netgr ||
- sudo_ldap_check_user_netgroup(ld, entry, pw->pw_name)) &&
- sudo_ldap_check_host(ld, entry)) {
-
- if (long_list)
- count += sudo_ldap_display_entry_long(ld, entry, lbuf);
- else
- count += sudo_ldap_display_entry_short(ld, entry, lbuf);
- }
- }
- ldap_msgfree(result);
- }
- efree(filt);
- }
-done:
- return(count);
-}
-
-static int
-sudo_ldap_display_cmnd(nss, pw)
- struct sudo_nss *nss;
- struct passwd *pw;
-{
- struct ldap_config_list_str *base;
- LDAP *ld = (LDAP *) nss->handle;
- LDAPMessage *entry, *result; /* used for searches */
- char *filt; /* used to parse attributes */
- int rc, found, do_netgr; /* temp/final return values */
-
- if (ld == NULL)
- return(1);
-
- /*
- * Okay - time to search for anything that matches this user
- * Lets limit it to only two queries of the LDAP server
- *
- * The first pass will look by the username, groups, and
- * the keyword ALL. We will then inspect the results that
- * came back from the query. We don't need to inspect the
- * sudoUser in this pass since the LDAP server already scanned
- * it for us.
- *
- * The second pass will return all the entries that contain
- * user netgroups. Then we take the netgroups returned and
- * try to match them against the username.
- */
- for (found = FALSE, do_netgr = 0; !found && do_netgr < 2; do_netgr++) {
- filt = do_netgr ? estrdup("sudoUser=+*") : sudo_ldap_build_pass1(pw);
- DPRINTF(("ldap search '%s'", filt), 1);
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE, filt,
- NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc != LDAP_SUCCESS)
- continue; /* no entries for this pass */
-
- LDAP_FOREACH(entry, ld, result) {
- if ((!do_netgr ||
- sudo_ldap_check_user_netgroup(ld, entry, pw->pw_name)) &&
- sudo_ldap_check_host(ld, entry) &&
- sudo_ldap_check_command(ld, entry, NULL) &&
- sudo_ldap_check_runas(ld, entry)) {
-
- found = TRUE;
- break;
- }
- }
- ldap_msgfree(result);
- }
- efree(filt);
- }
-
- if (found)
- printf("%s%s%s\n", safe_cmnd ? safe_cmnd : user_cmnd,
- user_args ? " " : "", user_args ? user_args : "");
- return(!found);
-}
-
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
-static int
-sudo_ldap_sasl_interact(ld, flags, _auth_id, _interact)
- LDAP *ld;
- unsigned int flags;
- void *_auth_id;
- void *_interact;
-{
- char *auth_id = (char *)_auth_id;
- sasl_interact_t *interact = (sasl_interact_t *)_interact;
-
- for (; interact->id != SASL_CB_LIST_END; interact++) {
- if (interact->id != SASL_CB_USER)
- return(LDAP_PARAM_ERROR);
-
- if (auth_id != NULL)
- interact->result = auth_id;
- else if (interact->defresult != NULL)
- interact->result = interact->defresult;
- else
- interact->result = "";
-
- interact->len = strlen(interact->result);
-#if SASL_VERSION_MAJOR < 2
- interact->result = estrdup(interact->result);
-#endif /* SASL_VERSION_MAJOR < 2 */
- }
- return(LDAP_SUCCESS);
-}
-#endif /* HAVE_LDAP_SASL_INTERACTIVE_BIND_S */
-
-/*
- * Set LDAP options based on the config table.
- */
-static int
-sudo_ldap_set_options(ld)
- LDAP *ld;
-{
- struct ldap_config_table *cur;
- int rc;
-
- /* Set ber options */
-#ifdef LBER_OPT_DEBUG_LEVEL
- if (ldap_conf.ldap_debug)
- ber_set_option(NULL, LBER_OPT_DEBUG_LEVEL, &ldap_conf.ldap_debug);
-#endif
-
- /* Set simple LDAP options */
- for (cur = ldap_conf_table; cur->conf_str != NULL; cur++) {
- LDAP *conn;
- int ival;
- char *sval;
-
- if (cur->opt_val == -1)
- continue;
-
- conn = cur->connected ? ld : NULL;
- switch (cur->type) {
- case CONF_BOOL:
- case CONF_INT:
- ival = *(int *)(cur->valp);
- if (ival >= 0) {
- rc = ldap_set_option(conn, cur->opt_val, &ival);
- if (rc != LDAP_OPT_SUCCESS) {
- warningx("ldap_set_option: %s -> %d: %s",
- cur->conf_str, ival, ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_set_option: %s -> %d", cur->conf_str, ival), 1);
- }
- break;
- case CONF_STR:
- sval = *(char **)(cur->valp);
- if (sval != NULL) {
- rc = ldap_set_option(conn, cur->opt_val, sval);
- if (rc != LDAP_OPT_SUCCESS) {
- warningx("ldap_set_option: %s -> %s: %s",
- cur->conf_str, sval, ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_set_option: %s -> %s", cur->conf_str, sval), 1);
- }
- break;
- }
- }
-
-#ifdef LDAP_OPT_NETWORK_TIMEOUT
- /* Convert bind_timelimit to a timeval */
- if (ldap_conf.bind_timelimit > 0) {
- struct timeval tv;
- tv.tv_sec = ldap_conf.bind_timelimit / 1000;
- tv.tv_usec = 0;
- rc = ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT, &tv);
- if (rc != LDAP_OPT_SUCCESS) {
- warningx("ldap_set_option(NETWORK_TIMEOUT, %ld): %s",
- (long)tv.tv_sec, ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT, %ld)",
- (long)tv.tv_sec), 1);
- }
-#endif
-
-#if defined(LDAP_OPT_X_TLS) && !defined(HAVE_LDAPSSL_INIT)
- if (ldap_conf.ssl_mode == SUDO_LDAP_SSL) {
- int val = LDAP_OPT_X_TLS_HARD;
- rc = ldap_set_option(ld, LDAP_OPT_X_TLS, &val);
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_set_option(LDAP_OPT_X_TLS, LDAP_OPT_X_TLS_HARD): %s",
- ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_set_option(LDAP_OPT_X_TLS, LDAP_OPT_X_TLS_HARD)"), 1);
- }
-#endif
- return(0);
-}
-
-/*
- * Connect to the LDAP server specified by ld
- */
-static int
-sudo_ldap_bind_s(ld)
- LDAP *ld;
-{
- int rc;
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
- const char *old_ccname = user_ccname;
-# ifdef HAVE_GSS_KRB5_CCACHE_NAME
- unsigned int status;
-# endif
-#endif
-
-#ifdef HAVE_LDAP_SASL_INTERACTIVE_BIND_S
- if (ldap_conf.rootuse_sasl == TRUE ||
- (ldap_conf.rootuse_sasl != FALSE && ldap_conf.use_sasl == TRUE)) {
- void *auth_id = ldap_conf.rootsasl_auth_id ?
- ldap_conf.rootsasl_auth_id : ldap_conf.sasl_auth_id;
-
- if (ldap_conf.krb5_ccname != NULL) {
-# ifdef HAVE_GSS_KRB5_CCACHE_NAME
- if (gss_krb5_ccache_name(&status, ldap_conf.krb5_ccname, &old_ccname)
- != GSS_S_COMPLETE) {
- old_ccname = NULL;
- DPRINTF(("gss_krb5_ccache_name() failed: %d", status), 1);
- }
-# else
- setenv("KRB5CCNAME", ldap_conf.krb5_ccname, TRUE);
-# endif
- }
- rc = ldap_sasl_interactive_bind_s(ld, ldap_conf.binddn, "GSSAPI",
- NULL, NULL, LDAP_SASL_QUIET, sudo_ldap_sasl_interact, auth_id);
- if (ldap_conf.krb5_ccname != NULL) {
-# ifdef HAVE_GSS_KRB5_CCACHE_NAME
- if (gss_krb5_ccache_name(&status, old_ccname, NULL) != GSS_S_COMPLETE)
- DPRINTF(("gss_krb5_ccache_name() failed: %d", status), 1);
-# else
- if (old_ccname != NULL)
- setenv("KRB5CCNAME", old_ccname, TRUE);
- else
- unsetenv("KRB5CCNAME");
-# endif
- }
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_sasl_interactive_bind_s(): %s", ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_sasl_interactive_bind_s() ok"), 1);
- } else
-#endif /* HAVE_LDAP_SASL_INTERACTIVE_BIND_S */
-#ifdef HAVE_LDAP_SASL_BIND_S
- {
- struct berval bv;
-
- bv.bv_val = ldap_conf.bindpw ? ldap_conf.bindpw : "";
- bv.bv_len = strlen(bv.bv_val);
-
- rc = ldap_sasl_bind_s(ld, ldap_conf.binddn, LDAP_SASL_SIMPLE, &bv,
- NULL, NULL, NULL);
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_sasl_bind_s(): %s", ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_sasl_bind_s() ok"), 1);
- }
-#else
- {
- rc = ldap_simple_bind_s(ld, ldap_conf.binddn, ldap_conf.bindpw);
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_simple_bind_s(): %s", ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_simple_bind_s() ok"), 1);
- }
-#endif
- return(0);
-}
-
-/*
- * Open a connection to the LDAP server.
- * Returns 0 on success and non-zero on failure.
- */
-static int
-sudo_ldap_open(nss)
- struct sudo_nss *nss;
-{
- LDAP *ld;
- int rc, ldapnoinit = FALSE;
-
- if (!sudo_ldap_read_config())
- return(-1);
-
- /* Prevent reading of user ldaprc and system defaults. */
- if (getenv("LDAPNOINIT") == NULL) {
- ldapnoinit = TRUE;
- setenv("LDAPNOINIT", "1", TRUE);
- }
-
- /* Connect to LDAP server */
-#ifdef HAVE_LDAP_INITIALIZE
- if (ldap_conf.uri != NULL) {
- char *buf = sudo_ldap_join_uri(ldap_conf.uri);
- DPRINTF(("ldap_initialize(ld, %s)", buf), 2);
- rc = ldap_initialize(&ld, buf);
- efree(buf);
- } else
-#endif
- rc = sudo_ldap_init(&ld, ldap_conf.host, ldap_conf.port);
- if (rc != LDAP_SUCCESS) {
- warningx("unable to initialize LDAP: %s", ldap_err2string(rc));
- return(-1);
- }
-
- if (ldapnoinit)
- unsetenv("LDAPNOINIT");
-
- /* Set LDAP options */
- if (sudo_ldap_set_options(ld) < 0)
- return(-1);
-
- if (ldap_conf.ssl_mode == SUDO_LDAP_STARTTLS) {
-#if defined(HAVE_LDAP_START_TLS_S)
- rc = ldap_start_tls_s(ld, NULL, NULL);
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_start_tls_s(): %s", ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_start_tls_s() ok"), 1);
-#elif defined(HAVE_LDAP_SSL_CLIENT_INIT) && defined(HAVE_LDAP_START_TLS_S_NP)
- if (ldap_ssl_client_init(NULL, NULL, 0, &rc) != LDAP_SUCCESS) {
- warningx("ldap_ssl_client_init(): %s", ldap_err2string(rc));
- return(-1);
- }
- rc = ldap_start_tls_s_np(ld, NULL);
- if (rc != LDAP_SUCCESS) {
- warningx("ldap_start_tls_s_np(): %s", ldap_err2string(rc));
- return(-1);
- }
- DPRINTF(("ldap_start_tls_s_np() ok"), 1);
-#else
- warningx("start_tls specified but LDAP libs do not support ldap_start_tls_s() or ldap_start_tls_s_np()");
-#endif /* !HAVE_LDAP_START_TLS_S && !HAVE_LDAP_START_TLS_S_NP */
- }
-
- /* Actually connect */
- if (sudo_ldap_bind_s(ld) != 0)
- return(-1);
-
- nss->handle = ld;
- return(0);
-}
-
-static int
-sudo_ldap_setdefs(nss)
- struct sudo_nss *nss;
-{
- struct ldap_config_list_str *base;
- LDAP *ld = (LDAP *) nss->handle;
- LDAPMessage *entry, *result; /* used for searches */
- int rc; /* temp return value */
-
- if (ld == NULL)
- return(-1);
-
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE,
- "cn=defaults", NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc == LDAP_SUCCESS && (entry = ldap_first_entry(ld, result))) {
- DPRINTF(("found:%s", ldap_get_dn(ld, entry)), 1);
- sudo_ldap_parse_options(ld, entry);
- } else
- DPRINTF(("no default options found in %s", base->val), 1);
-
- if (result)
- ldap_msgfree(result);
- }
-
- return(0);
-}
-
-/*
- * like sudoers_lookup() - only LDAP style
- */
-static int
-sudo_ldap_lookup(nss, ret, pwflag)
- struct sudo_nss *nss;
- int ret;
- int pwflag;
-{
- struct ldap_config_list_str *base;
- LDAP *ld = (LDAP *) nss->handle;
- LDAPMessage *entry, *result;
- char *filt;
- int do_netgr, rc, matched;
- int setenv_implied;
- int ldap_user_matches = FALSE, ldap_host_matches = FALSE;
- struct passwd *pw = list_pw ? list_pw : sudo_user.pw;
-
- if (ld == NULL)
- return(ret);
-
- if (pwflag) {
- int doauth = UNSPEC;
- enum def_tupple pwcheck =
- (pwflag == -1) ? never : sudo_defs_table[pwflag].sd_un.tuple;
-
- for (matched = 0, do_netgr = 0; !matched && do_netgr < 2; do_netgr++) {
- filt = do_netgr ? estrdup("sudoUser=+*") : sudo_ldap_build_pass1(pw);
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE, filt,
- NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc != LDAP_SUCCESS)
- continue;
-
- LDAP_FOREACH(entry, ld, result) {
- /* only verify netgroup matches in pass 2 */
- if (do_netgr && !sudo_ldap_check_user_netgroup(ld, entry, pw->pw_name))
- continue;
-
- ldap_user_matches = TRUE;
- if (sudo_ldap_check_host(ld, entry)) {
- ldap_host_matches = TRUE;
- if ((pwcheck == any && doauth != FALSE) ||
- (pwcheck == all && doauth == FALSE))
- doauth = sudo_ldap_check_bool(ld, entry, "authenticate");
- /* Only check the command when listing another user. */
- if (user_uid == 0 || list_pw == NULL ||
- user_uid == list_pw->pw_uid ||
- sudo_ldap_check_command(ld, entry, NULL)) {
- matched = 1;
- break; /* end foreach */
- }
- }
- }
- ldap_msgfree(result);
- }
- efree(filt);
- }
- if (matched || user_uid == 0) {
- SET(ret, VALIDATE_OK);
- CLR(ret, VALIDATE_NOT_OK);
- if (def_authenticate) {
- switch (pwcheck) {
- case always:
- SET(ret, FLAG_CHECK_USER);
- break;
- case all:
- case any:
- if (doauth == FALSE)
- def_authenticate = FALSE;
- break;
- case never:
- def_authenticate = FALSE;
- break;
- default:
- break;
- }
- }
- }
- goto done;
- }
-
- /*
- * Okay - time to search for anything that matches this user
- * Lets limit it to only two queries of the LDAP server
- *
- * The first pass will look by the username, groups, and
- * the keyword ALL. We will then inspect the results that
- * came back from the query. We don't need to inspect the
- * sudoUser in this pass since the LDAP server already scanned
- * it for us.
- *
- * The second pass will return all the entries that contain
- * user netgroups. Then we take the netgroups returned and
- * try to match them against the username.
- */
- setenv_implied = FALSE;
- for (matched = 0, do_netgr = 0; !matched && do_netgr < 2; do_netgr++) {
- filt = do_netgr ? estrdup("sudoUser=+*") : sudo_ldap_build_pass1(pw);
- DPRINTF(("ldap search '%s'", filt), 1);
- for (base = ldap_conf.base; base != NULL; base = base->next) {
- result = NULL;
- rc = ldap_search_ext_s(ld, base->val, LDAP_SCOPE_SUBTREE, filt,
- NULL, 0, NULL, NULL, NULL, 0, &result);
- if (rc != LDAP_SUCCESS) {
- DPRINTF(("nothing found for '%s'", filt), 1);
- continue;
- }
-
- /* parse each entry returned from this most recent search */
- LDAP_FOREACH(entry, ld, result) {
- DPRINTF(("found:%s", ldap_get_dn(ld, entry)), 1);
- if (
- /* first verify user netgroup matches - only if in pass 2 */
- (!do_netgr || sudo_ldap_check_user_netgroup(ld, entry, pw->pw_name)) &&
- /* remember that user matched */
- (ldap_user_matches = TRUE) &&
- /* verify host match */
- sudo_ldap_check_host(ld, entry) &&
- /* remember that host matched */
- (ldap_host_matches = TRUE) &&
- /* verify runas match */
- sudo_ldap_check_runas(ld, entry) &&
- /* verify command match */
- (rc = sudo_ldap_check_command(ld, entry, &setenv_implied)) != UNSPEC
- ) {
- /* We have a match! */
- DPRINTF(("Command %sallowed", rc == TRUE ? "" : "NOT "), 1);
- matched = TRUE;
- if (rc == TRUE) {
- /* pick up any options */
- if (setenv_implied)
- def_setenv = TRUE;
- sudo_ldap_parse_options(ld, entry);
-#ifdef HAVE_SELINUX
- /* Set role and type if not specified on command line. */
- if (user_role == NULL)
- user_role = def_role;
- if (user_type == NULL)
- user_type = def_type;
-#endif /* HAVE_SELINUX */
- /* make sure we don't reenter loop */
- SET(ret, VALIDATE_OK);
- CLR(ret, VALIDATE_NOT_OK);
- } else {
- SET(ret, VALIDATE_NOT_OK);
- CLR(ret, VALIDATE_OK);
- }
- /* break from inside for loop */
- break;
- }
- }
- ldap_msgfree(result);
- }
- efree(filt);
- }
-
-done:
- DPRINTF(("user_matches=%d", ldap_user_matches), 1);
- DPRINTF(("host_matches=%d", ldap_host_matches), 1);
-
- if (!ISSET(ret, VALIDATE_OK)) {
- /* we do not have a match */
- if (pwflag && list_pw == NULL)
- SET(ret, FLAG_NO_CHECK);
- }
- if (ldap_user_matches)
- CLR(ret, FLAG_NO_USER);
- if (ldap_host_matches)
- CLR(ret, FLAG_NO_HOST);
- DPRINTF(("sudo_ldap_lookup(%d)=0x%02x", pwflag, ret), 1);
-
- return(ret);
-}
-
-/*
- * shut down LDAP connection
- */
-static int
-sudo_ldap_close(nss)
- struct sudo_nss *nss;
-{
- if (nss->handle != NULL) {
- ldap_unbind_ext_s((LDAP *) nss->handle, NULL, NULL);
- nss->handle = NULL;
- }
- return(0);
-}
-
-/*
- * STUB
- */
-static int
-sudo_ldap_parse(nss)
- struct sudo_nss *nss;
-{
- return(0);
-}
projects / debian / sudo / blobdiff