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l0dables: check file size

This commit is contained in:
schneider 2011-08-05 22:32:00 +02:00
parent cca3c4ccad
commit 8a5c93be66
1 changed files with 16 additions and 13 deletions
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29
firmware/filesystem/execute.c
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@ -49,28 +49,31 @@ uint8_t execute_file (const char * fname){
#ifdef ENCRYPT_L0DABLE #ifdef ENCRYPT_L0DABLE
uint32_t *data; uint32_t *data;
uint32_t len; uint32_t len;
if( readbytes & 0x3 ){
lcdPrint("readbytes&3");
lcdRefresh();
getInputWait();
getInputRelease();
return -1;
}
uint32_t mac[4]; uint32_t mac[4];
data = (uint32_t*)dst; data = (uint32_t*)dst;
len = readbytes/4; len = readbytes/4;
if( readbytes & 0xF ){
lcdClear();
lcdPrint("!size");
lcdRefresh();
getInputWait();
getInputWaitRelease();
return -1;
}
xxtea_cbcmac(mac, (uint32_t*)dst, len-4, l0dable_sign_key); xxtea_cbcmac(mac, (uint32_t*)dst, len-4, l0dable_sign_key);
if( data[len-4] != mac[0] || data[len-3] != mac[1] if( data[len-4] != mac[0] || data[len-3] != mac[1]
|| data[len-2] != mac[2] || data[len-1] != mac[3] ){ || data[len-2] != mac[2] || data[len-1] != mac[3] ){
lcdClear(); lcdClear();
lcdPrint("mac wrong");lcdNl(); lcdPrint("!mac");lcdNl();
lcdPrintIntHex(mac[0]); lcdNl(); //lcdPrintIntHex(mac[0]); lcdNl();
lcdPrintIntHex(mac[1]); lcdNl(); //lcdPrintIntHex(mac[1]); lcdNl();
lcdPrintIntHex(mac[2]); lcdNl(); //lcdPrintIntHex(mac[2]); lcdNl();
lcdPrintIntHex(mac[3]); lcdNl(); //lcdPrintIntHex(mac[3]); lcdNl();
lcdRefresh(); lcdRefresh();
getInputWait(); getInputWait();
getInputRelease(); getInputWaitRelease();
return -1; return -1;
} }
data = (uint32_t*)dst; data = (uint32_t*)dst;