CHG: 'HF MF C*' (chinese backdoor commands) According to douniwan5788 some magic...

[proxmark3-svn] / armsrc / desfire_crypto.c

diff --git a/armsrc/desfire_crypto.c b/armsrc/desfire_crypto.c
index 8bb8034838afb89e82fad9e7378e0dda11c9636f..e7eceb3ccf59f89ac70157ddfcdb6aa3f1f3ee09 100644 (file)
--- a/armsrc/desfire_crypto.c
+++ b/armsrc/desfire_crypto.c
@@ -84,6 +84,7 @@ void cmac (const desfirekey_t key, uint8_t *ivect, const uint8_t *data, size_t l
     mifare_cypher_blocks_chained (NULL, key, ivect, buffer, len, MCD_SEND, MCO_ENCYPHER);
 
     memcpy (cmac, ivect, kbs);
+       free(buffer);
 }
 
 size_t key_block_size (const desfirekey_t key) {
@@ -160,7 +161,7 @@ size_t enciphered_data_length (const desfiretag_t tag, const size_t nbytes, int
     return padded_data_length (nbytes + crc_length, block_size);
 }
 
-void* mifare_cryto_preprocess_data (desfiretag_t tag, void *data, size_t *nbytes, off_t offset, int communication_settings) {
+void* mifare_cryto_preprocess_data (desfiretag_t tag, void *data, size_t *nbytes, size_t offset, int communication_settings) {
     uint8_t *res = data;
     uint8_t mac[4];
     size_t edl;
@@ -225,8 +226,8 @@ void* mifare_cryto_preprocess_data (desfiretag_t tag, void *data, size_t *nbytes
             cmac (key, DESFIRE (tag)->ivect, res, *nbytes, DESFIRE (tag)->cmac);
 
             if (append_mac) {
-                maced_data_length (key, *nbytes);
-
+                size_t len = maced_data_length (key, *nbytes);
+                               ++len;
                 memcpy (res, data, *nbytes);
                 memcpy (res + *nbytes, DESFIRE (tag)->cmac, CMAC_LENGTH);
                 *nbytes += CMAC_LENGTH;
@@ -288,7 +289,7 @@ void* mifare_cryto_preprocess_data (desfiretag_t tag, void *data, size_t *nbytes
 
 }
 
-void* mifare_cryto_postprocess_data (desfiretag_t tag, void *data, ssize_t *nbytes, int communication_settings)
+void* mifare_cryto_postprocess_data (desfiretag_t tag, void *data, size_t *nbytes, int communication_settings)
 {
     void *res = data;
     size_t edl;
@@ -579,7 +580,7 @@ void mifare_cypher_single_block (desfirekey_t key, uint8_t *data, uint8_t *ivect
                        {
                                AesCtx ctx;
                                AesCtxIni(&ctx, ivect, key->data, KEY128,CBC); 
-                               AesEncrypt(&ctx, data, edata, sizeof(data) );
+                               AesEncrypt(&ctx, data, edata, sizeof(edata) );
                                break;
                        }
                        case MCO_DECYPHER: