return SW_WRONG_LENGTH for incorrect lc

.all-contributorsrc

@@ -178,15 +178,6 @@
         "business",
         "ideas"
       ]
-    },
-    {
-      "login": "oplik0",
-      "name": "Jakub",
-      "avatar_url": "https://avatars2.githubusercontent.com/u/25460763?v=4",
-      "profile": "https://github.com/oplik0",
-      "contributions": [
-        "bug"
-      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -135,7 +135,6 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/m3hm00d"><img src="https://avatars1.githubusercontent.com/u/42179593?v=4" width="100px;" alt="f.m3hm00d"/><br /><sub><b>f.m3hm00d</b></sub></a><br /><a href="https://github.com/solokeys/solo/commits?author=m3hm00d" title="Documentation">📖</a></td>
     <td align="center"><a href="http://blogs.gnome.org/hughsie/"><img src="https://avatars0.githubusercontent.com/u/151380?v=4" width="100px;" alt="Richard Hughes"/><br /><sub><b>Richard Hughes</b></sub></a><br /><a href="#ideas-hughsie" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/solokeys/solo/commits?author=hughsie" title="Code">💻</a> <a href="#infra-hughsie" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#tool-hughsie" title="Tools">🔧</a></td>
     <td align="center"><a href="http://www.schulz.dk"><img src="https://avatars1.githubusercontent.com/u/1150049?v=4" width="100px;" alt="Kim Schulz"/><br /><sub><b>Kim Schulz</b></sub></a><br /><a href="#business-kimusan" title="Business development">💼</a> <a href="#ideas-kimusan" title="Ideas, Planning, & Feedback">🤔</a></td>
-    <td align="center"><a href="https://github.com/oplik0"><img src="https://avatars2.githubusercontent.com/u/25460763?v=4" width="100px;" alt="Jakub"/><br /><sub><b>Jakub</b></sub></a><br /><a href="https://github.com/solokeys/solo/issues?q=author%3Aoplik0" title="Bug reports">🐛</a></td>
   </tr>
 </table>
 
@@ -169,7 +168,7 @@ You can buy Solo, Solo Tap, and Solo for Hackers at [solokeys.com](https://solok
 <br/>
 
 [![License](https://img.shields.io/github/license/solokeys/solo.svg)](https://github.com/solokeys/solo/blob/master/LICENSE)
-[![All Contributors](https://img.shields.io/badge/all_contributors-19-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-18-orange.svg?style=flat-square)](#contributors)
 [![Build Status](https://travis-ci.com/solokeys/solo.svg?branch=master)](https://travis-ci.com/solokeys/solo)
 [![Discourse Users](https://img.shields.io/discourse/https/discourse.solokeys.com/users.svg)](https://discourse.solokeys.com)
 [![Keybase Chat](https://img.shields.io/badge/chat-on%20keybase-brightgreen.svg)](https://keybase.io/team/solokeys.public)

STABLE_VERSION

@@ -1 +1 @@
-2.5.1
+2.4.3

fido2/apdu.c

@@ -9,7 +9,7 @@
 
 #include "apdu.h"
 
-int apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu) 
+uint16_t apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu) 
 {
     EXT_APDU_HEADER *hapdu = (EXT_APDU_HEADER *)data;
     
@@ -62,6 +62,11 @@ int apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu)
     if (len >= 7 && b0 == 0)
     {
         uint16_t extlen = (hapdu->lc[1] << 8) + hapdu->lc[2];
+
+        if (len - 7 < extlen)
+        {
+            return SW_WRONG_LENGTH;
+        }
         
          // case 2E (Le) - extended
         if (len == 7)
@@ -103,9 +108,18 @@ int apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu)
             apdu->le = 0x10000;
         }
     }
+    else
+    {
+        if ((len > 5) && (len - 5 < hapdu->lc[0]))
+        {
+            return SW_WRONG_LENGTH;
+        }
+    }
     
     if (!apdu->case_type)
-        return 1;
+    {
+        return SW_COND_USE_NOT_SATISFIED;
+    }
     
     if (apdu->lc)
     {

fido2/apdu.h

@@ -36,7 +36,7 @@ typedef struct
     uint8_t case_type;
 } __attribute__((packed)) APDU_STRUCT;
 
-extern int apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu);
+extern uint16_t apdu_decode(uint8_t *data, size_t len, APDU_STRUCT *apdu);
 
 #define APDU_FIDO_U2F_REGISTER        0x01
 #define APDU_FIDO_U2F_AUTHENTICATE    0x02

targets/stm32l432/src/nfc.c

@@ -784,9 +784,10 @@ void nfc_process_iblock(uint8_t * buf, int len)
     }
     
     APDU_STRUCT apdu;
-    if (apdu_decode(buf + block_offset, len - block_offset, &apdu)) {
+    uint16_t ret = apdu_decode(buf + block_offset, len - block_offset, &apdu);
+    if (ret != 0) {
         printf1(TAG_NFC,"apdu decode error\r\n");
-        nfc_write_response(buf[0], SW_COND_USE_NOT_SATISFIED);
+        nfc_write_response(buf[0], ret);
         return;
     }
     printf1(TAG_NFC,"apdu ok. %scase=%02x cla=%02x ins=%02x p1=%02x p2=%02x lc=%d le=%d\r\n",