1 files changed, 97 insertions, 0 deletions
diff --git a/src/auth/passdb-bsdauth.c b/src/auth/passdb-bsdauth.c
new file mode 100644
index 0000000..36469c6
--- /dev/null
+++ b/src/auth/passdb-bsdauth.c
@@ -0,0 +1,97 @@
+/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
+
+#include "auth-common.h"
+#include "passdb.h"
+
+#ifdef PASSDB_BSDAUTH
+
+#include "safe-memset.h"
+#include "auth-cache.h"
+#include "ipwd.h"
+#include "mycrypt.h"
+
+#include <login_cap.h>
+#include <bsd_auth.h>
+
+static void
+bsdauth_verify_plain(struct auth_request *request, const char *password,
+		    verify_plain_callback_t *callback)
+{
+	struct passwd pw;
+	const char *type;
+	int result;
+
+	e_debug(authdb_event(request), "lookup");
+
+	switch (i_getpwnam(request->fields.user, &pw)) {
+	case -1:
+		e_error(authdb_event(request),
+			"getpwnam() failed: %m");
+		callback(PASSDB_RESULT_INTERNAL_FAILURE, request);
+		return;
+	case 0:
+		auth_request_log_unknown_user(request, AUTH_SUBSYS_DB);
+		callback(PASSDB_RESULT_USER_UNKNOWN, request);
+		return;
+	}
+
+	/* check if the password is valid */
+	type = t_strdup_printf("auth-%s", request->fields.service);
+	result = auth_userokay(request->fields.user, NULL,
+			       t_strdup_noconst(type),
+			       t_strdup_noconst(password));
+
+	/* clear the passwords from memory */
+	safe_memset(pw.pw_passwd, 0, strlen(pw.pw_passwd));
+
+	if (result == 0) {
+		auth_request_log_password_mismatch(request, AUTH_SUBSYS_DB);
+		callback(PASSDB_RESULT_PASSWORD_MISMATCH, request);
+		return;
+	}
+
+	/* make sure we're using the username exactly as it's in the database */
+        auth_request_set_field(request, "user", pw.pw_name, NULL);
+
+	callback(PASSDB_RESULT_OK, request);
+}
+
+static struct passdb_module *
+bsdauth_preinit(pool_t pool, const char *args)
+{
+	struct passdb_module *module;
+
+	module = p_new(pool, struct passdb_module, 1);
+	module->default_pass_scheme = "PLAIN"; /* same reason as PAM */
+	module->blocking = TRUE;
+
+	if (strcmp(args, "blocking=no") == 0)
+		module->blocking = FALSE;
+	else if (str_begins(args, "cache_key="))
+		module->default_cache_key = auth_cache_parse_key(pool, args + 10);
+	else if (*args != '\0')
+		i_fatal("passdb bsdauth: Unknown setting: %s", args);
+	return module;
+}
+
+static void bsdauth_deinit(struct passdb_module *module ATTR_UNUSED)
+{
+	endpwent();
+}
+
+struct passdb_module_interface passdb_bsdauth = {
+	"bsdauth",
+
+	bsdauth_preinit,
+	NULL,
+	bsdauth_deinit,
+
+	bsdauth_verify_plain,
+	NULL,
+	NULL
+};
+#else
+struct passdb_module_interface passdb_bsdauth = {
+	.name = "bsdauth"
+};
+#endif