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Diffstat (limited to 'usr.sbin/smtpd/map_db.c')
-rw-r--r--usr.sbin/smtpd/map_db.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/usr.sbin/smtpd/map_db.c b/usr.sbin/smtpd/map_db.c
new file mode 100644
index 00000000000..17e8a1ae32d
--- /dev/null
+++ b/usr.sbin/smtpd/map_db.c
@@ -0,0 +1,258 @@
+/* $OpenBSD: map_db.c,v 1.1 2011/12/13 23:00:52 eric Exp $ */
+
+/*
+ * Copyright (c) 2011 Gilles Chehade <gilles@openbsd.org>
+ *
+ * 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 <sys/types.h>
+#include <sys/queue.h>
+#include <sys/tree.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <db.h>
+#include <ctype.h>
+#include <err.h>
+#include <event.h>
+#include <fcntl.h>
+#include <imsg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "smtpd.h"
+#include "log.h"
+
+
+/* db(3) backend */
+static void *map_db_open(char *);
+static void *map_db_lookup(void *, char *, enum map_kind);
+static void map_db_close(void *);
+
+static char *map_db_get_entry(void *, char *, size_t *);
+static void *map_db_secret(char *, char *, size_t);
+static void *map_db_alias(char *, char *, size_t);
+static void *map_db_virtual(char *, char *, size_t);
+
+
+struct map_backend map_backend_db = {
+ map_db_open,
+ map_db_close,
+ map_db_lookup
+};
+
+
+static void *
+map_db_open(char *src)
+{
+ return dbopen(src, O_RDONLY, 0600, DB_HASH, NULL);
+}
+
+static void
+map_db_close(void *hdl)
+{
+ DB *db = hdl;
+
+ db->close(db);
+}
+
+static void *
+map_db_lookup(void *hdl, char *key, enum map_kind kind)
+{
+ char *line;
+ size_t len;
+ void *ret;
+
+ line = map_db_get_entry(hdl, key, &len);
+ if (line == NULL)
+ return NULL;
+
+ ret = 0;
+ switch (kind) {
+ case K_ALIAS:
+ ret = map_db_alias(key, line, len);
+ break;
+
+ case K_SECRET:
+ ret = map_db_secret(key, line, len);
+ break;
+
+ case K_VIRTUAL:
+ ret = map_db_virtual(key, line, len);
+ break;
+
+ default:
+ break;
+ }
+
+ free(line);
+
+ return ret;
+}
+
+
+static char *
+map_db_get_entry(void *hdl, char *key, size_t *len)
+{
+ int ret;
+ DBT dbk;
+ DBT dbv;
+ DB *db = hdl;
+ char *result = NULL;
+
+ dbk.data = key;
+ dbk.size = strlen(dbk.data) + 1;
+
+ if ((ret = db->get(db, &dbk, &dbv, 0)) != 0)
+ return NULL;
+
+ result = calloc(dbv.size, 1);
+ if (result == NULL)
+ fatal("calloc");
+ (void)strlcpy(result, dbv.data, dbv.size);
+
+ *len = dbv.size;
+
+ return result;
+}
+
+static void *
+map_db_secret(char *key, char *line, size_t len)
+{
+ struct map_secret *map_secret = NULL;
+ char *p;
+
+ /* credentials are stored as user:password */
+ if (len < 3)
+ return NULL;
+
+ /* too big to fit in a smtp session line */
+ if (len >= MAX_LINE_SIZE)
+ return NULL;
+
+ p = strchr(line, ':');
+ if (p == NULL)
+ return NULL;
+
+ if (p == line || p == line + len - 1)
+ return NULL;
+ *p++ = '\0';
+
+ map_secret = calloc(1, sizeof(struct map_secret));
+ if (map_secret == NULL)
+ fatalx("calloc");
+
+ if (strlcpy(map_secret->username, line,
+ sizeof(map_secret->username)) >=
+ sizeof(map_secret->username))
+ goto err;
+
+ if (strlcpy(map_secret->password, p,
+ sizeof(map_secret->password)) >=
+ sizeof(map_secret->password))
+ goto err;
+
+ return map_secret;
+
+err:
+ free(map_secret);
+ return NULL;
+}
+
+static void *
+map_db_alias(char *key, char *line, size_t len)
+{
+ char *subrcpt;
+ char *endp;
+ struct map_alias *map_alias = NULL;
+ struct expandnode expnode;
+
+ map_alias = calloc(1, sizeof(struct map_alias));
+ if (map_alias == NULL)
+ fatalx("calloc");
+
+ while ((subrcpt = strsep(&line, ",")) != NULL) {
+ /* subrcpt: strip initial whitespace. */
+ while (isspace((int)*subrcpt))
+ ++subrcpt;
+ if (*subrcpt == '\0')
+ goto error;
+
+ /* subrcpt: strip trailing whitespace. */
+ endp = subrcpt + strlen(subrcpt) - 1;
+ while (subrcpt < endp && isspace((int)*endp))
+ *endp-- = '\0';
+
+ bzero(&expnode, sizeof (struct expandnode));
+ if (! alias_parse(&expnode, subrcpt))
+ goto error;
+
+ expandtree_increment_node(&map_alias->expandtree, &expnode);
+ map_alias->nbnodes++;
+ }
+
+ return map_alias;
+
+error:
+ /* free elements in map_alias->expandtree */
+ expandtree_free_nodes(&map_alias->expandtree);
+ free(map_alias);
+ return NULL;
+}
+
+static void *
+map_db_virtual(char *key, char *line, size_t len)
+{
+ char *subrcpt;
+ char *endp;
+ struct map_virtual *map_virtual = NULL;
+ struct expandnode expnode;
+
+ map_virtual = calloc(1, sizeof(struct map_virtual));
+ if (map_virtual == NULL)
+ fatalx("calloc");
+
+ /* domain key, discard value */
+ if (strchr(key, '@') == NULL)
+ return map_virtual;
+
+ while ((subrcpt = strsep(&line, ",")) != NULL) {
+ /* subrcpt: strip initial whitespace. */
+ while (isspace((int)*subrcpt))
+ ++subrcpt;
+ if (*subrcpt == '\0')
+ goto error;
+
+ /* subrcpt: strip trailing whitespace. */
+ endp = subrcpt + strlen(subrcpt) - 1;
+ while (subrcpt < endp && isspace((int)*endp))
+ *endp-- = '\0';
+
+ bzero(&expnode, sizeof (struct expandnode));
+ if (! alias_parse(&expnode, subrcpt))
+ goto error;
+
+ expandtree_increment_node(&map_virtual->expandtree, &expnode);
+ map_virtual->nbnodes++;
+ }
+
+ return map_virtual;
+
+error:
+ /* free elements in map_virtual->expandtree */
+ expandtree_free_nodes(&map_virtual->expandtree);
+ free(map_virtual);
+ return NULL;
+}