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Basic support for EAC documents (e.g. German Identification Card)

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-new files armsrc/epa.[ch] for ePA (electronic "Personalausweis") related functions
    -Offers elementary functions (EPA_PACE_MSE_Set_AT etc.)
    -Also offers one new USB command: EPA_PACE_Collect_Nonce
-created new command subtree in client: client/hfepa.[ch] ("hf epa")
    -offers "hf epa cnonces" (collect encrypted PACE nonces)
-more to come
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frederikmoellers@aol.de 2012-08-28 21:39:50 +00:00
commit 5acd09bdfb
11 changed files with 601 additions and 7 deletions
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//-----------------------------------------------------------------------------
// Copyright (C) 2012 Frederik Möllers
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Commands related to the German electronic Identification Card
//-----------------------------------------------------------------------------
#include "util.h"
#include "proxusb.h"
#include "ui.h"
#include "cmdparser.h"
#include "common.h"
#include "cmdmain.h"
#include "cmdhfepa.h"
static int CmdHelp(const char *Cmd);
// Perform (part of) the PACE protocol
int CmdHFEPACollectPACENonces(const char *Cmd)
{
// requested nonce size
uint8_t m = 0;
// requested number of Nonces
unsigned int n = 0;
sscanf(Cmd, "%hhu %u", &m, &n);
// values are expected to be > 0
m = m > 0 ? m : 1;
n = n > 0 ? n : 1;
PrintAndLog("Collecting %u %hhu-byte nonces", n, m);
PrintAndLog("Start: %u", time(NULL));
// repeat n times
for (unsigned int i = 0; i < n; i++) {
// execute PACE
UsbCommand c = {CMD_EPA_PACE_COLLECT_NONCE, {(int)m, 0, 0}};
SendCommand(&c);
UsbCommand *resp = WaitForResponse(CMD_ACK);
// check if command failed
if (resp->arg[0] != 0) {
PrintAndLog("Error in step %d, Return code: %d",
resp->arg[0],
(int)resp->arg[1]);
} else {
size_t nonce_length = resp->arg[1];
char *nonce = (char *) malloc(2 * nonce_length + 1);
for(int j = 0; j < nonce_length; j++) {
snprintf(nonce + (2 * j), 3, "%02X", resp->d.asBytes[j]);
}
// print nonce
PrintAndLog("Length: %d, Nonce: %s",
resp->arg[1], nonce);
}
}
PrintAndLog("End: %u", time(NULL));
return 1;
}
// UI-related stuff
static const command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"cnonces", CmdHFEPACollectPACENonces, 0, "<m> <n> Acquire n>0 encrypted PACE nonces of size m>0"},
{NULL, NULL, 0, NULL}
};
int CmdHelp(const char *Cmd)
{
CmdsHelp(CommandTable);
return 0;
}
int CmdHFEPA(const char *Cmd)
{
// flush
while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ;
// parse
CmdsParse(CommandTable, Cmd);
return 0;
}