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-rw-r--r--src/auth.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/src/auth.c b/src/auth.c
new file mode 100644
index 0000000..0031300
--- /dev/null
+++ b/src/auth.c
@@ -0,0 +1,316 @@
+/*
+ * User authentication & authorization
+ *
+ * Copyright 2010 Krzysztof Piotr Oledzki <ole@ans.pl>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#ifdef USE_LIBCRYPT
+/* This is to have crypt() defined on Linux */
+#define _GNU_SOURCE
+
+#ifdef USE_CRYPT_H
+/* some platforms such as Solaris need this */
+#include <crypt.h>
+#endif
+#endif /* USE_LIBCRYPT */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <haproxy/api.h>
+#include <haproxy/auth-t.h>
+#include <haproxy/errors.h>
+#include <haproxy/global.h>
+#include <haproxy/list.h>
+#include <haproxy/pattern-t.h>
+#include <haproxy/sample-t.h>
+#include <haproxy/thread.h>
+
+struct userlist *userlist = NULL; /* list of all existing userlists */
+
+#ifdef USE_LIBCRYPT
+#define CRYPT_STATE_MSG "yes"
+#ifdef HA_HAVE_CRYPT_R
+/* context for crypt_r() */
+static THREAD_LOCAL struct crypt_data crypt_data = { .initialized = 0 };
+#else
+/* lock for crypt() */
+__decl_thread(static HA_SPINLOCK_T auth_lock);
+#endif
+#else /* USE_LIBCRYPT */
+#define CRYPT_STATE_MSG "no"
+#endif
+
+/* find targets for selected groups. The function returns pointer to
+ * the userlist struct or NULL if name is NULL/empty or unresolvable.
+ */
+
+struct userlist *
+auth_find_userlist(char *name)
+{
+ struct userlist *l;
+
+ if (!name || !*name)
+ return NULL;
+
+ for (l = userlist; l; l = l->next)
+ if (strcmp(l->name, name) == 0)
+ return l;
+
+ return NULL;
+}
+
+int check_group(struct userlist *ul, char *name)
+{
+ struct auth_groups *ag;
+
+ for (ag = ul->groups; ag; ag = ag->next)
+ if (strcmp(name, ag->name) == 0)
+ return 1;
+ return 0;
+}
+
+void
+userlist_free(struct userlist *ul)
+{
+ struct userlist *tul;
+ struct auth_users *au, *tau;
+ struct auth_groups_list *agl, *tagl;
+ struct auth_groups *ag, *tag;
+
+ while (ul) {
+ /* Free users. */
+ au = ul->users;
+ while (au) {
+ /* Free groups that own current user. */
+ agl = au->u.groups;
+ while (agl) {
+ tagl = agl;
+ agl = agl->next;
+ free(tagl);
+ }
+
+ tau = au;
+ au = au->next;
+ free(tau->user);
+ free(tau->pass);
+ free(tau);
+ }
+
+ /* Free grouplist. */
+ ag = ul->groups;
+ while (ag) {
+ tag = ag;
+ ag = ag->next;
+ free(tag->name);
+ free(tag);
+ }
+
+ tul = ul;
+ ul = ul->next;
+ free(tul->name);
+ free(tul);
+ };
+}
+
+int userlist_postinit()
+{
+ struct userlist *curuserlist = NULL;
+
+ /* Resolve usernames and groupnames. */
+ for (curuserlist = userlist; curuserlist; curuserlist = curuserlist->next) {
+ struct auth_groups *ag;
+ struct auth_users *curuser;
+ struct auth_groups_list *grl;
+
+ for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
+ char *group = NULL;
+ struct auth_groups_list *groups = NULL;
+
+ if (!curuser->u.groups_names)
+ continue;
+
+ while ((group = strtok(group?NULL:curuser->u.groups_names, ","))) {
+ for (ag = curuserlist->groups; ag; ag = ag->next) {
+ if (strcmp(ag->name, group) == 0)
+ break;
+ }
+
+ if (!ag) {
+ ha_alert("userlist '%s': no such group '%s' specified in user '%s'\n",
+ curuserlist->name, group, curuser->user);
+ free(groups);
+ return ERR_ALERT | ERR_FATAL;
+ }
+
+ /* Add this group at the group userlist. */
+ grl = calloc(1, sizeof(*grl));
+ if (!grl) {
+ ha_alert("userlist '%s': no more memory when trying to allocate the user groups.\n",
+ curuserlist->name);
+ free(groups);
+ return ERR_ALERT | ERR_FATAL;
+ }
+
+ grl->group = ag;
+ grl->next = groups;
+ groups = grl;
+ }
+
+ free(curuser->u.groups);
+ curuser->u.groups = groups;
+ }
+
+ for (ag = curuserlist->groups; ag; ag = ag->next) {
+ char *user = NULL;
+
+ if (!ag->groupusers)
+ continue;
+
+ while ((user = strtok(user?NULL:ag->groupusers, ","))) {
+ for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
+ if (strcmp(curuser->user, user) == 0)
+ break;
+ }
+
+ if (!curuser) {
+ ha_alert("userlist '%s': no such user '%s' specified in group '%s'\n",
+ curuserlist->name, user, ag->name);
+ return ERR_ALERT | ERR_FATAL;
+ }
+
+ /* Add this group at the group userlist. */
+ grl = calloc(1, sizeof(*grl));
+ if (!grl) {
+ ha_alert("userlist '%s': no more memory when trying to allocate the user groups.\n",
+ curuserlist->name);
+ return ERR_ALERT | ERR_FATAL;
+ }
+
+ grl->group = ag;
+ grl->next = curuser->u.groups;
+ curuser->u.groups = grl;
+ }
+
+ ha_free(&ag->groupusers);
+ }
+
+#ifdef DEBUG_AUTH
+ for (ag = curuserlist->groups; ag; ag = ag->next) {
+ struct auth_groups_list *agl;
+
+ fprintf(stderr, "group %s, id %p, users:", ag->name, ag);
+ for (curuser = curuserlist->users; curuser; curuser = curuser->next) {
+ for (agl = curuser->u.groups; agl; agl = agl->next) {
+ if (agl->group == ag)
+ fprintf(stderr, " %s", curuser->user);
+ }
+ }
+ fprintf(stderr, "\n");
+ }
+#endif
+ }
+
+ return ERR_NONE;
+}
+
+/*
+ * Authenticate and authorize user; return 1 if OK, 0 if case of error.
+ */
+int
+check_user(struct userlist *ul, const char *user, const char *pass)
+{
+
+ struct auth_users *u;
+#ifdef DEBUG_AUTH
+ struct auth_groups_list *agl;
+#endif
+ const char *ep;
+
+#ifdef DEBUG_AUTH
+ fprintf(stderr, "req: userlist=%s, user=%s, pass=%s\n",
+ ul->name, user, pass);
+#endif
+
+ for (u = ul->users; u; u = u->next)
+ if (strcmp(user, u->user) == 0)
+ break;
+
+ if (!u)
+ return 0;
+
+#ifdef DEBUG_AUTH
+ fprintf(stderr, "cfg: user=%s, pass=%s, flags=%X, groups=",
+ u->user, u->pass, u->flags);
+ for (agl = u->u.groups; agl; agl = agl->next)
+ fprintf(stderr, " %s", agl->group->name);
+#endif
+
+ if (!(u->flags & AU_O_INSECURE)) {
+#ifdef USE_LIBCRYPT
+#ifdef HA_HAVE_CRYPT_R
+ ep = crypt_r(pass, u->pass, &crypt_data);
+#else
+ HA_SPIN_LOCK(AUTH_LOCK, &auth_lock);
+ ep = crypt(pass, u->pass);
+ HA_SPIN_UNLOCK(AUTH_LOCK, &auth_lock);
+#endif
+#else
+ return 0;
+#endif
+ } else
+ ep = pass;
+
+#ifdef DEBUG_AUTH
+ fprintf(stderr, ", crypt=%s\n", ((ep) ? ep : ""));
+#endif
+
+ if (ep && strcmp(ep, u->pass) == 0)
+ return 1;
+ else
+ return 0;
+}
+
+struct pattern *
+pat_match_auth(struct sample *smp, struct pattern_expr *expr, int fill)
+{
+ struct userlist *ul = smp->ctx.a[0];
+ struct pattern_list *lst;
+ struct auth_users *u;
+ struct auth_groups_list *agl;
+ struct pattern *pattern;
+
+ /* Check if the userlist is present in the context data. */
+ if (!ul)
+ return NULL;
+
+ /* Browse the userlist for searching user. */
+ for (u = ul->users; u; u = u->next) {
+ if (strcmp(smp->data.u.str.area, u->user) == 0)
+ break;
+ }
+ if (!u)
+ return NULL;
+
+ /* Browse each pattern. */
+ list_for_each_entry(lst, &expr->patterns, list) {
+ pattern = &lst->pat;
+
+ /* Browse each group for searching group name that match the pattern. */
+ for (agl = u->u.groups; agl; agl = agl->next) {
+ if (strcmp(agl->group->name, pattern->ptr.str) == 0)
+ return pattern;
+ }
+ }
+ return NULL;
+}
+
+REGISTER_BUILD_OPTS("Encrypted password support via crypt(3): "CRYPT_STATE_MSG);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 03:55:15 +0000