hf 15 dump had an logic bug when reading the sysinfo response. It is always fixed size but the logic for handling the Information byte flags made it skip bytes when it wasnt 0x0F

CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+- Fixed `hf 15 dump` - now reads sysinfo response correct (@iceman1001)
 - Changed `make clean` - it now removes all __pycache__ folders (@iceman1001)
 - Fixed `hf 15 readmulti` - fix block calculations (@iceman1001)
 - Changed `mem load` - now handles UL-C and UL-AES dictionary files (@iceman1001)

client/src/cmdhf15.c

@@ -1240,8 +1240,11 @@ static int CmdHF15ELoad(const char *Cmd) {
             ((tag->pagesCount * tag->bytesPerPage) > ISO15693_TAG_MAX_SIZE) ||
             (tag->pagesCount == 0) ||
             (tag->bytesPerPage == 0)) {
+
         PrintAndLogEx(FAILED, "Tag size error: pagesCount=%d, bytesPerPage=%d",
-                      tag->pagesCount, tag->bytesPerPage);
+                      tag->pagesCount,
+                      tag->bytesPerPage
+                     );
         free(tag);
         return PM3_EINVARG;
     }
@@ -1904,33 +1907,47 @@ static int CmdHF15Dump(const char *Cmd) {
     uint8_t dCpt = 10;
 
     int res = iso15_error_handling_card_response(d, resp.length);
-    if (res != PM3_SUCCESS) {
+    if (res == PM3_ECRC) {
         free(tag);
         free(packet);
         return res;
     }
 
-    memcpy(tag->uid, &d[2], 8);
+    if (res == PM3_SUCCESS) {
+        memcpy(tag->uid, d + 2, 8);
 
         if (d[1] & 0x01) {
-        tag->dsfid = d[dCpt++];
+            tag->dsfid = d[dCpt];
         }
+        dCpt++;
 
         if (d[1] & 0x02) {
-        tag->afi = d[dCpt++];
+            tag->afi = d[dCpt];
         }
+        dCpt++;
 
         if (d[1] & 0x04) {
-        tag->pagesCount = d[dCpt++] + 1;
-        tag->bytesPerPage = d[dCpt++] + 1;
+            tag->pagesCount = d[dCpt] + 1;
+            tag->bytesPerPage = d[dCpt + 1] + 1;
         } else {
             // Set tag memory layout values (if can't be read in SYSINFO)
             tag->bytesPerPage = blocksize;
             tag->pagesCount = 128;
         }
+        dCpt += 2;
 
         if (d[1] & 0x08) {
-        tag->ic = d[dCpt++];
+            tag->ic = d[dCpt];
+        }
+        dCpt++;
+
+    } else {
+        tag->uid[0] = 0xE0;
+        tag->dsfid = 0;
+        tag->afi = 0;
+        // Set tag memory layout values (if can't be read in SYSINFO)
+        tag->bytesPerPage = blocksize;
+        tag->pagesCount = 128;
     }
 
     // add length for blockno (1)
@@ -2244,7 +2261,9 @@ static int CmdHF15Readmulti(const char *Cmd) {
 
     // 0 means 1 page,
     // 1 means 2 pages, ...
-    if (blockcnt > 0) blockcnt--;
+    if (blockcnt > 0) {
+        blockcnt--;
+    }
 
     packet->raw[packet->rawlen++] = blockno;
     packet->raw[packet->rawlen++] = blockcnt;
@@ -2702,8 +2721,11 @@ static int CmdHF15Restore(const char *Cmd) {
             ((tag->pagesCount * tag->bytesPerPage) > ISO15693_TAG_MAX_SIZE) ||
             (tag->pagesCount == 0) ||
             (tag->bytesPerPage == 0)) {
+
         PrintAndLogEx(FAILED, "Tag size error: pagesCount=%d, bytesPerPage=%d",
-                      tag->pagesCount, tag->bytesPerPage);
+                      tag->pagesCount,
+                      tag->bytesPerPage
+                     );
         free(tag);
         return PM3_EINVARG;
     }
@@ -2734,8 +2756,8 @@ static int CmdHF15Restore(const char *Cmd) {
 
         for (tried = 0; tried < retries; tried++) {
 
-            retval = hf_15_write_blk(&pm3flags, flags, uid, fast
-                                     , i, data, tag->bytesPerPage);
+            retval = hf_15_write_blk(&pm3flags, flags, uid, fast, i, data, tag->bytesPerPage);
+
             if (retval == PM3_SUCCESS) {
                 PrintAndLogEx(INPLACE, "blk %3d", i);
 
@@ -3467,8 +3489,11 @@ static int CmdHF15View(const char *Cmd) {
             ((tag->pagesCount * tag->bytesPerPage) > ISO15693_TAG_MAX_SIZE) ||
             (tag->pagesCount == 0) ||
             (tag->bytesPerPage == 0)) {
+
         PrintAndLogEx(FAILED, "Tag size error: pagesCount=%d, bytesPerPage=%d",
-                      tag->pagesCount, tag->bytesPerPage);
+                      tag->pagesCount,
+                      tag->bytesPerPage
+                     );
         free(tag);
         return PM3_EINVARG;
     }