Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 195 insertions, 0 deletions

diff --git a/source3/modules/vfs_virusfilter_clamav.c b/source3/modules/vfs_virusfilter_clamav.c
new file mode 100644
index 0000000..fb93cae
--- /dev/null
+++ b/source3/modules/vfs_virusfilter_clamav.c
@@ -0,0 +1,195 @@
+/*
+   Samba-VirusFilter VFS modules
+   ClamAV clamd support
+   Copyright (C) 2010-2016 SATOH Fumiyasu @ OSS Technology Corp., Japan
+
+   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 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Default values for standard "extra" configuration variables */
+
+#ifdef CLAMAV_DEFAULT_SOCKET_PATH
+#  define VIRUSFILTER_DEFAULT_SOCKET_PATH	CLAMAV_DEFAULT_SOCKET_PATH
+#else
+#  define VIRUSFILTER_DEFAULT_SOCKET_PATH	"/var/run/clamav/clamd.ctl"
+#endif
+
+#include "modules/vfs_virusfilter_common.h"
+#include "modules/vfs_virusfilter_utils.h"
+
+static int virusfilter_clamav_connect(struct vfs_handle_struct *handle,
+				      struct virusfilter_config *config,
+				      const char *svc,
+				      const char *user)
+{
+
+	/* To use clamd "zXXXX" commands */
+	virusfilter_io_set_writel_eol(config->io_h, "\0", 1);
+	virusfilter_io_set_readl_eol(config->io_h, "\0", 1);
+
+	return 0;
+}
+
+static virusfilter_result virusfilter_clamav_scan_init(
+	struct virusfilter_config *config)
+{
+	struct virusfilter_io_handle *io_h = config->io_h;
+	bool ok;
+
+	DBG_INFO("clamd: Connecting to socket: %s\n",
+		 config->socket_path);
+
+	become_root();
+	ok = virusfilter_io_connect_path(io_h, config->socket_path);
+	unbecome_root();
+
+	if (!ok) {
+		DBG_ERR("clamd: Connecting to socket failed: %s: %s\n",
+			config->socket_path, strerror(errno));
+		return VIRUSFILTER_RESULT_ERROR;
+	}
+
+	DBG_INFO("clamd: Connected\n");
+
+	return VIRUSFILTER_RESULT_OK;
+}
+
+static void virusfilter_clamav_scan_end(
+	struct virusfilter_config *config)
+{
+	struct virusfilter_io_handle *io_h = config->io_h;
+
+	DBG_INFO("clamd: Disconnecting\n");
+
+	virusfilter_io_disconnect(io_h);
+}
+
+static virusfilter_result virusfilter_clamav_scan(
+	struct vfs_handle_struct *handle,
+	struct virusfilter_config *config,
+	const struct files_struct *fsp,
+	char **reportp)
+{
+	char *cwd_fname = fsp->conn->cwd_fsp->fsp_name->base_name;
+	const char *fname = fsp->fsp_name->base_name;
+	size_t filepath_len = strlen(cwd_fname) + 1 /* slash */ + strlen(fname);
+	struct virusfilter_io_handle *io_h = config->io_h;
+	virusfilter_result result = VIRUSFILTER_RESULT_CLEAN;
+	char *report = NULL;
+	char *reply = NULL;
+	char *reply_msg = NULL;
+	char *reply_token;
+	bool ok;
+
+	DBG_INFO("Scanning file: %s/%s\n", cwd_fname, fname);
+
+	ok = virusfilter_io_writefl_readl(io_h, &reply, "zSCAN %s/%s",
+					  cwd_fname, fname);
+	if (!ok) {
+		DBG_ERR("clamd: zSCAN: I/O error: %s\n", strerror(errno));
+		result = VIRUSFILTER_RESULT_ERROR;
+		report = talloc_asprintf(talloc_tos(),
+					 "Scanner I/O error: %s\n",
+					 strerror(errno));
+		goto virusfilter_clamav_scan_return;
+	}
+
+	if (reply[filepath_len] != ':' ||
+	    reply[filepath_len+1] != ' ')
+	{
+		DBG_ERR("clamd: zSCAN: Invalid reply: %s\n",
+			reply);
+		result = VIRUSFILTER_RESULT_ERROR;
+		report = talloc_asprintf(talloc_tos(),
+					 "Scanner communication error");
+		goto virusfilter_clamav_scan_return;
+	}
+	reply_msg = reply + filepath_len + 2;
+
+	reply_token = strrchr(reply, ' ');
+
+	if (reply_token == NULL) {
+		DBG_ERR("clamd: zSCAN: Invalid reply: %s\n",
+			reply);
+		result = VIRUSFILTER_RESULT_ERROR;
+		report = talloc_asprintf(talloc_tos(),
+					 "Scanner communication error");
+		goto virusfilter_clamav_scan_return;
+	}
+	*reply_token = '\0';
+	reply_token++;
+
+	if (strcmp(reply_token, "OK") == 0) {
+
+		/* <FILEPATH>: OK */
+		result = VIRUSFILTER_RESULT_CLEAN;
+		report = talloc_asprintf(talloc_tos(), "Clean");
+	} else if (strcmp(reply_token, "FOUND") == 0) {
+
+		/* <FILEPATH>: <REPORT> FOUND */
+		result = VIRUSFILTER_RESULT_INFECTED;
+		report = talloc_strdup(talloc_tos(), reply_msg);
+	} else if (strcmp(reply_token, "ERROR") == 0) {
+
+		/* <FILEPATH>: <REPORT> ERROR */
+		DBG_ERR("clamd: zSCAN: Error: %s\n", reply_msg);
+		result = VIRUSFILTER_RESULT_ERROR;
+		report = talloc_asprintf(talloc_tos(),
+					 "Scanner error: %s\t", reply_msg);
+	} else {
+		DBG_ERR("clamd: zSCAN: Invalid reply: %s\n", reply_token);
+		result = VIRUSFILTER_RESULT_ERROR;
+		report = talloc_asprintf(talloc_tos(),
+					 "Scanner communication error");
+	}
+
+virusfilter_clamav_scan_return:
+	TALLOC_FREE(reply);
+	if (report == NULL) {
+		*reportp = talloc_asprintf(talloc_tos(),
+					   "Scanner report memory error");
+	} else {
+		*reportp = report;
+	}
+
+	return result;
+}
+
+static struct virusfilter_backend_fns virusfilter_backend_clamav = {
+	.connect = virusfilter_clamav_connect,
+	.disconnect = NULL,
+	.scan_init = virusfilter_clamav_scan_init,
+	.scan = virusfilter_clamav_scan,
+	.scan_end = virusfilter_clamav_scan_end,
+};
+
+int virusfilter_clamav_init(struct virusfilter_config *config)
+{
+	struct virusfilter_backend *backend = NULL;
+
+	if (config->socket_path == NULL) {
+		config->socket_path = VIRUSFILTER_DEFAULT_SOCKET_PATH;
+	}
+
+	backend = talloc_zero(config, struct virusfilter_backend);
+	if (backend == NULL) {
+		return -1;
+	}
+
+	backend->fns = &virusfilter_backend_clamav;
+	backend->name = "clamav";
+
+	config->backend = backend;
+	return 0;
+}