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-rw-r--r--smbinfo.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/smbinfo.c b/smbinfo.c
new file mode 100644
index 0000000..b1c129b
--- /dev/null
+++ b/smbinfo.c
@@ -0,0 +1,305 @@
+/*
+ * smbinfo
+ *
+ * Copyright (C) Ronnie Sahlberg (lsahlberg@redhat.com) 2018
+ * Copyright (C) Aurelien Aptel (aaptel@suse.com) 2018
+ *
+ * Display SMB-specific file information using cifs IOCTL
+ *
+ * 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.
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <endian.h>
+#include <errno.h>
+#include <getopt.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <inttypes.h>
+
+#define CIFS_IOCTL_MAGIC 0xCF
+struct smb_query_info {
+ uint32_t info_type;
+ uint32_t file_info_class;
+ uint32_t additional_information;
+ uint32_t flags;
+ uint32_t input_buffer_length;
+ uint32_t output_buffer_length;
+ /* char buffer[]; */
+} __packed;
+
+#define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)
+#define INPUT_BUFFER_LENGTH 16384
+
+static void
+usage(char *name)
+{
+ fprintf(stderr, "Usage: %s <command> <file>\n"
+ "Commands are\n"
+ " secdesc:\n"
+ " Prints the security descriptor for a cifs file.\n"
+ " quota:\n"
+ " Prints the quota for a cifs file.\n",
+ name);
+ exit(1);
+}
+
+static void
+print_sid(unsigned char *sd)
+{
+ int i;
+ uint32_t subauth;
+ uint64_t idauth;
+
+ if (sd[0] != 1) {
+ fprintf(stderr, "Unknown SID revision\n");
+ return;
+ }
+
+ idauth = 0;
+ for (i = 0; i < 6; i++)
+ idauth = (idauth << 8) | sd[2 + i];
+
+ printf("S-1-%" PRIu64, idauth);
+ for (i = 0; i < sd[1]; i++) {
+ memcpy(&subauth, &sd[8 + 4 * i], 4);
+ subauth = le32toh(subauth);
+ printf("-%d", subauth);
+ }
+}
+
+static void
+print_acl(unsigned char *sd)
+{
+ int i, j, off;
+ uint16_t count, size;
+
+ if (sd[0] != 2) {
+ fprintf(stderr, "Unknown ACL revision\n");
+ return;
+ }
+
+ memcpy(&count, &sd[4], 2);
+ count = le16toh(count);
+ off = 8;
+ for (i = 0; i < count; i++) {
+ printf("Type:%02x Flags:%02x ", sd[off], sd[off + 1]);
+ memcpy(&size, &sd[off + 2], 2);
+ size = le16toh(size);
+
+ for (j = 0; j < size; j++)
+ printf("%02x", sd[off + 4 + j]);
+
+ off += size;
+ printf("\n");
+ }
+}
+
+static void
+print_sd(uint8_t *sd)
+{
+ int offset_owner, offset_group, offset_dacl;
+
+ printf("Revision:%d\n", sd[0]);
+ if (sd[0] != 1) {
+ fprintf(stderr, "Unknown SD revision\n");
+ exit(1);
+ }
+
+ printf("Control: %02x%02x\n", sd[2], sd[3]);
+
+ memcpy(&offset_owner, &sd[4], 4);
+ offset_owner = le32toh(offset_owner);
+ memcpy(&offset_group, &sd[8], 4);
+ offset_group = le32toh(offset_group);
+ memcpy(&offset_dacl, &sd[16], 4);
+ offset_dacl = le32toh(offset_dacl);
+
+ if (offset_owner) {
+ printf("Owner: ");
+ print_sid(&sd[offset_owner]);
+ printf("\n");
+ }
+ if (offset_group) {
+ printf("Group: ");
+ print_sid(&sd[offset_group]);
+ printf("\n");
+ }
+ if (offset_dacl) {
+ printf("DACL:\n");
+ print_acl(&sd[offset_dacl]);
+ }
+}
+
+void secdesc(int f) {
+ struct smb_query_info *qi;
+
+ qi = malloc(sizeof(struct smb_query_info) + INPUT_BUFFER_LENGTH);
+ qi->info_type = 0x03;
+ qi->file_info_class = 0;
+ qi->additional_information = 0x00000007; /* Owner, Group, Dacl */
+ qi->input_buffer_length = INPUT_BUFFER_LENGTH;
+
+ if (ioctl(f, CIFS_QUERY_INFO, qi) < 0) {
+ fprintf(stderr, "ioctl failed with %s\n", strerror(errno));
+ exit(1);
+ }
+
+ print_sd((uint8_t *)(&qi[1]));
+}
+
+void
+win_to_timeval(uint64_t smb2_time, struct timeval *tv)
+{
+ tv->tv_usec = (smb2_time / 10) % 1000000;
+ tv->tv_sec = (smb2_time - 116444736000000000) / 10000000;
+}
+
+static void
+print_quota(unsigned char *sd)
+{
+ uint32_t u32, neo;
+ uint64_t u64;
+ struct timeval tv;
+ struct tm;
+ int i, off = 0;
+
+ one_more:
+ memcpy(&u32, &sd[off], 4);
+ neo = le32toh(u32);
+
+ memcpy(&u32, &sd[off + 4], 4);
+ u32 = le32toh(u32);
+ printf("SID Length %d\n", u32);
+
+ memcpy(&u64, &sd[off + 8], 8);
+ win_to_timeval(le64toh(u64), &tv);
+ printf("Change Time %s", ctime(&tv.tv_sec));
+
+ memcpy(&u64, &sd[off + 16], 8);
+ u64 = le32toh(u64);
+ printf("Quota Used %" PRIu64 "\n", u64);
+
+ memcpy(&u64, &sd[off + 24], 8);
+ u64 = le64toh(u64);
+ if (u64 == 0xffffffffffffffff) {
+ printf("Quota Threshold NO THRESHOLD\n");
+ } else {
+ printf("Quota Threshold %" PRIu64 "\n", u64);
+ }
+
+ memcpy(&u64, &sd[off + 32], 8);
+ u64 = le64toh(u64);
+ if (u64 == 0xffffffffffffffff) {
+ printf("Quota Limit NO LIMIT\n");
+ } else {
+ printf("Quota Limit %" PRIu64 "\n", u64);
+ }
+
+ printf("SID: S-1");
+ u64 = 0;
+ for (i = 0; i < 6; i++)
+ u64 = (u64 << 8) | sd[off + 42 + i];
+ printf("-%" PRIu64, u64);
+
+ for (i = 0; i < sd[off + 41]; i++) {
+ memcpy(&u32, &sd[off + 48 + 4 * i], 4);
+ u32 = le32toh(u32);
+ printf("-%u", u32);
+ }
+ printf("\n\n");
+ off += neo;
+
+ if (neo != 0) {
+ goto one_more;
+ }
+}
+
+void quota(int f) {
+ struct smb_query_info *qi;
+ char *buf;
+ int i;
+
+ qi = malloc(sizeof(struct smb_query_info) + 16384);
+ memset(qi, 0, sizeof(struct smb_query_info) + 16384);
+ qi->info_type = 0x04;
+ qi->file_info_class = 0;
+ qi->additional_information = 0; /* Owner, Group, Dacl */
+ qi->input_buffer_length = 16384;
+
+ buf = (char *)&qi[1];
+ buf[0] = 0; /* return single */
+ buf[1] = 1; /* restart scan */
+
+ /* sid list length */
+ i = 0;
+ memcpy(&buf[4], &i, 4);
+
+ qi->output_buffer_length = 16;
+
+ if (ioctl(f, CIFS_QUERY_INFO, qi) < 0) {
+ fprintf(stderr, "ioctl failed with %s\n", strerror(errno));
+ exit(1);
+ }
+
+ print_quota((unsigned char *)(&qi[1]));
+}
+
+int main(int argc, char *argv[])
+{
+ int c;
+ int f;
+
+ while ((c = getopt_long(argc, argv, "v", NULL, NULL)) != -1) {
+ switch (c) {
+ case 'v':
+ printf("smbinfo version %s\n", VERSION);
+ return 0;
+ default:
+ usage(argv[0]);
+ }
+ }
+
+ if (optind >= argc - 1)
+ usage(argv[0]);
+
+ if ((f = open(argv[optind + 1], O_RDONLY)) < 0) {
+ fprintf(stderr, "Failed to open %s\n", argv[optind + 1]);
+ exit(1);
+ }
+
+
+ if (!strcmp(argv[1], "secdesc")) {
+ secdesc(f);
+ } else if (!strcmp(argv[1], "quota")) {
+ quota(f);
+ } else {
+ fprintf(stderr, "Unknown command %s\n", argv[optind]);
+ exit(1);
+ }
+
+
+ close(f);
+ return 0;
+}
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