/* Parse a single option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
/* Get the input argument from argp_parse, which we
know is a pointer to our arguments structure. */
struct arguments *arguments = state->input;
int slot;
long int address_arg;
switch (key)
{
case 'a':
/* TODO: Not working as expected */
address_arg = strtol (arg,NULL,16);
if (0 != address_arg)
{
arguments->address = address_arg;
LCA_LOG (DEBUG, "Using address %u", address_arg);
}
else
LCA_LOG (INFO, "Address not recognized, using default");
break;
case 'b':
arguments->bus = arg;
break;
case 'q': case 's':
arguments->silent = 1;
break;
case 'v':
arguments->verbose = 1;
lca_set_log_level (DEBUG);
break;
case 'f':
arguments->input_file = arg;
break;
case OPT_UPDATE_SEED:
arguments->update_seed = true;
break;
case 'k':
slot = atoi (arg);
if (slot < 0 || slot > 15)
argp_usage (state);
arguments->key_slot = slot;
break;
case 'c':
if (!is_hex_arg (arg, 64))
{
fprintf (stderr, "%s\n", "Invalid Challenge.");
argp_usage (state);
}
else
arguments->challenge = arg;
break;
case OPT_SIGNATURE:
if (!is_hex_arg (arg, 128))
{
fprintf (stderr, "%s\n", "Invalid P256 Signature.");
argp_usage (state);
}
else
arguments->signature = arg;
break;
case OPT_PUB_KEY:
if (!is_hex_arg (arg, 130))
{
fprintf (stderr, "%s\n", "Invalid P256 Public Key.");
argp_usage (state);
}
else
arguments->pub_key = arg;
break;
case 'w':
if (!is_hex_arg (arg, 64))
{
fprintf (stderr, "%s\n", "Invalid Data.");
argp_usage (state);
}
else
arguments->write_data = arg;
break;
case 'r':
if (!is_hex_arg (arg, 64))
{
fprintf (stderr, "%s\n", "Invalid Challenge Response.");
argp_usage (state);
}
else
arguments->challenge_rsp = arg;
break;
case 'm':
if (!is_hex_arg (arg, 26))
{
fprintf (stderr, "%s\n", "Invalid Meta Data.");
argp_usage (state);
}
else
arguments->meta = arg;
break;
case ARGP_KEY_ARG:
if (state->arg_num >= NUM_ARGS)
/* Too many arguments. */
argp_usage (state);
else
arguments->args[state->arg_num] = arg;
break;
case ARGP_KEY_END:
if (state->arg_num < NUM_ARGS)
/* Not enough arguments. */
argp_usage (state);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
int
hard_sign (const uint8_t *to_sign, size_t len,
jwa_t alg, void *cookie,
uint8_t **out, size_t *out_len)
{
int fd = ecc108_fd;
int rc = -1;
struct lca_octet_buffer hash;
gcry_sexp_t sig, digest;
const unsigned int DLEN = gcry_md_get_algo_dlen (GCRY_MD_SHA256);
hash.ptr = malloc (DLEN);
hash.len = DLEN;
assert (NULL != hash.ptr);
gcry_md_hash_buffer (GCRY_MD_SHA256, hash.ptr, to_sign, len);
//lca_set_log_level (DEBUG);
lca_print_hex_string ("hash: ", hash.ptr, hash.len);
lca_set_log_level (INFO);
lca_wakeup(fd);
struct lca_octet_buffer r =
gen_nonce (fd, hash);
assert (NULL != r.ptr);
struct lca_octet_buffer s =
lca_ecc_sign (fd, 0);
assert (NULL != s.ptr);
*out = s.ptr;
*out_len = s.len;
/* verify sig */
/* r = */
/* gen_nonce (fd, hash); */
/* assert (NULL != r.ptr); */
/* struct lca_octet_buffer apkb = lca_make_buffer (sizeof (apk)); */
/* memcpy (apkb.ptr, apk, sizeof(apk)); */
/* assert (lca_ecc_verify (fd, apkb, s)); */
lca_idle (fd);
//lca_set_log_level (DEBUG);
lca_print_hex_string ("Signature: ", s.ptr, s.len);
lca_set_log_level (INFO);
printf ("Len: %d\n", s.len);
return 0;
}