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vcard: read keys from filesystem

This commit is contained in:
schneider 2011-07-24 21:53:11 +02:00
parent f79d3b49f4
commit 4c8839b2ba
5 changed files with 50 additions and 8 deletions
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6
default-files/README Normal file
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@ -0,0 +1,6 @@
This directory contains some default files
for the filesystem of your r0ket:
pubx.key - X component of the public key
puby.key - Y component of the public key
priv.key - Private key

1
default-files/priv.key Normal file
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@ -0,0 +1 @@
0e10e787036941e6c78daf8a0e8e1dbfac68e26d2

1
default-files/pubx.key Normal file
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@ -0,0 +1 @@
1c56d302cf642a8e1ba4b48cc4fbe2845ee32dce7

1
default-files/puby.key Normal file
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@ -0,0 +1 @@
45f46eb303edf2e62f74bd68368d979e265ee3c03

49
firmware/applications/vcard.c
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@ -18,20 +18,40 @@ FATFS FatFs[_VOLUMES]; /* File system object for logical drive */
/**************************************************************************/ /**************************************************************************/
uint8_t mac[5] = {1,2,3,2,1}; uint8_t mac[5] = {1,2,3,2,1};
char *Px = "1c56d302cf642a8e1ba4b48cc4fbe2845ee32dce7";
char *Py = "45f46eb303edf2e62f74bd68368d979e265ee3c03";
char *Priv ="0e10e787036941e6c78daf8a0e8e1dbfac68e26d2";
void sendPublicKey(char *px, char *py) void sendPublicKey(void)
{ {
uint8_t exp[2 + 4*NUMWORDS + 2]; uint8_t exp[2 + 4*NUMWORDS + 2];
char buf[42];
UINT readbytes;
FIL file;
if( f_open(&file, "pubx.key", FA_OPEN_EXISTING|FA_READ) ){
return;
}
if( f_read(&file, buf, 41, &readbytes) || readbytes != 41 ){
return;
}
f_close(&file);
buf[41] = 0;
exp[0] = 'P'; exp[0] = 'P';
bitstr_parse_export((char*)exp+2, px); bitstr_parse_export((char*)exp+2, buf);
exp[1] = 'X'; exp[1] = 'X';
nrf_snd_pkt_crc(32, exp); nrf_snd_pkt_crc(32, exp);
delayms(10); delayms(10);
if( f_open(&file, "puby.key", FA_OPEN_EXISTING|FA_READ) ){
return;
}
if( f_read(&file, buf, 41, &readbytes) || readbytes != 41 ){
return;
}
f_close(&file);
buf[41] = 0;
exp[1] = 'Y'; exp[1] = 'Y';
bitstr_parse_export((char*)exp+2, py); bitstr_parse_export((char*)exp+2, buf);
nrf_snd_pkt_crc(32, exp); nrf_snd_pkt_crc(32, exp);
delayms(10); delayms(10);
} }
@ -116,7 +136,7 @@ int sendKeys(void)
while( !done ){ while( !done ){
lcdClear(); lcdClear();
lcdPrintln("Sending PUBKEY");lcdRefresh(); lcdPrintln("Sending PUBKEY");lcdRefresh();
sendPublicKey(Px,Py); sendPublicKey();
sendMac(); sendMac();
lcdPrintln("Done"); lcdPrintln("Done");
lcdPrintln("Right=OK"); lcdPrintln("Right=OK");
@ -185,6 +205,19 @@ void receiveFile(void)
if( sendKeys() ) if( sendKeys() )
return; return;
char priv[42];
UINT readbytes;
FIL file;
if( f_open(&file, "priv.key", FA_OPEN_EXISTING|FA_READ) ){
return;
}
if( f_read(&file, priv, 41, &readbytes) || readbytes != 41 ){
return;
}
f_close(&file);
priv[41] = 0;
uint8_t done = 0; uint8_t done = 0;
uint8_t key; uint8_t key;
uint8_t k1[16], k2[16], rx[4*NUMWORDS], ry[4*NUMWORDS]; uint8_t k1[16], k2[16], rx[4*NUMWORDS], ry[4*NUMWORDS];
@ -204,7 +237,7 @@ void receiveFile(void)
continue; continue;
lcdPrintln("Creating key"); lcdPrintln("Creating key");
lcdRefresh(); lcdRefresh();
ECIES_decryptkeygen(rx, ry, k1, k2, Priv); ECIES_decryptkeygen(rx, ry, k1, k2, priv);
if( filetransfer_receive(mac,(uint32_t*)k1) < 0 ) if( filetransfer_receive(mac,(uint32_t*)k1) < 0 )
continue; continue;
lcdPrintln("Right=OK"); lcdPrintln("Right=OK");