cmdflashmemspiffs.c: allow dump from SPIFFS to trace buffer without saving to local fs

client/src/cmdflashmemspiffs.c

@@ -16,6 +16,7 @@
 // Proxmark3 RDV40 Flash memory commands
 //-----------------------------------------------------------------------------
 #include "cmdflashmemspiffs.h"
+#include "cmdtrace.h"
 #include <ctype.h>
 #include "cmdparser.h"  // command_t
 #include "pmflash.h"
@@ -369,17 +370,21 @@ static int CmdFlashMemSpiFFSDump(const char *Cmd) {
     CLIParserInit(&ctx, "mem spiffs dump",
                   "Dumps device SPIFFS file to a local file\n"
                   "Size is handled by first sending a STAT command against file to verify existence",
-                  "mem spiffs dump -s tag.bin             --> download binary file from device\n"
-                  "mem spiffs dump -s tag.bin -d a001 -e   --> download tag.bin, save as `a001.bin`"
+                  "mem spiffs dump -s tag.bin           --> download binary file from device\n"
+                  "mem spiffs dump -s tag.bin -d a001   --> download tag.bin, save as `a001.bin`\n"
+                  "mem spiffs dump -s tag.bin -t        --> download tag.bin into client trace buffer"
                  );
 
     void *argtable[] = {
         arg_param_begin,
         arg_str1("s", "src", "<fn>", "SPIFFS file to save"),
         arg_str0("d", "dest", "<fn>", "file name to save to <w/o .bin>"),
+        arg_lit0("t", "trace", "download into trace buffer, not local file"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, false);
+    bool use_buffer = arg_get_lit(ctx, 3);
+
 
     int slen = 0;
     char src[32] = {0};
@@ -416,21 +421,31 @@ static int CmdFlashMemSpiFFSDump(const char *Cmd) {
         return PM3_EFLASH;
     }
 
-    // save to file
-    char fn[FILE_PATH_SIZE] = {0};
-    if (dlen == 0) {
-        strncpy(fn, src, slen);
+    if (use_buffer == true) {
+        // copy to client trace buffer
+        if (!ImportTraceBuffer(dump, len))
+        {
+            PrintAndLogEx(FAILED, "error, copying to trace buffer");
+            free(dump);
+            return PM3_EMALLOC;
+        }
+        PrintAndLogEx(SUCCESS, "Use 'trace list -1 -t ...' to view, 'trace save -f ...' to save");
     } else {
-        strncpy(fn, dest, dlen);
+        // save to file
+        char fn[FILE_PATH_SIZE] = {0};
+        if (dlen == 0) {
+            strncpy(fn, src, slen);
+        } else {
+            strncpy(fn, dest, dlen);
+        }
+
+        // set file extension
+        char *suffix = strchr(fn, '.');
+        if (suffix)
+            saveFile(fn, suffix, dump, len);
+        else
+            saveFile(fn, ".bin", dump, len); // default
     }
-
-    // set file extension
-    char *suffix = strchr(fn, '.');
-    if (suffix)
-        saveFile(fn, suffix, dump, len);
-    else
-        saveFile(fn, ".bin", dump, len); // default
-
     free(dump);
     return PM3_SUCCESS;
 }
@@ -513,7 +528,7 @@ static int CmdFlashMemSpiFFSView(const char *Cmd) {
 
     CLIParserContext *ctx;
     CLIParserInit(&ctx, "mem spiffs view",
-                  "View a file on flash memory on devicer in console",
+                  "View a file on flash memory on device in console",
                   "mem spiffs view -f tag.bin"
                  );
 

client/src/cmdtrace.c

@@ -91,6 +91,25 @@ static uint8_t calc_pos(const uint8_t *d) {
     return pos;
 }
 
+// Copy an existing buffer into client trace buffer
+// I think this is cleaner than further globalizing gs_trace, and may lend itself to more modularity later?
+bool ImportTraceBuffer(uint8_t *trace_src, uint16_t trace_len)
+{
+    if (trace_len == 0 || trace_src == NULL) return(false);
+    if (gs_trace) {
+        free(gs_trace);
+        gs_traceLen = 0;
+    }
+    gs_trace = calloc(trace_len, sizeof(uint8_t));
+    if (gs_trace == NULL)
+    {
+        return(false);
+    }
+    memcpy(gs_trace, trace_src, trace_len);
+    gs_traceLen = trace_len;
+    return(true);
+}
+
 static uint8_t extract_uid[10] = {0};
 static uint8_t extract_uidlen = 0;
 static uint8_t extract_epurse[8] = {0};

client/src/cmdtrace.h

@@ -24,5 +24,6 @@
 int CmdTrace(const char *Cmd);
 int CmdTraceList(const char *Cmd);
 int CmdTraceListAlias(const char *Cmd, const char *alias, const char *protocol);
+bool ImportTraceBuffer(uint8_t *trace_src, uint16_t trace_len);
 
 #endif