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fix GET CHALLENGE

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NIIBE Yutaka
2013-02-13 13:32:38 +09:00
parent c12f331217
commit 5213d9ab82
5 changed files with 40 additions and 10 deletions
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16
src/openpgp.c
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@@ -52,7 +52,6 @@
#define INS_PUT_DATA 0xda
#define INS_PUT_DATA_ODD 0xdb /* For key import */
#define CHALLENGE_LEN 32
static const uint8_t *challenge; /* Random bytes */
static const uint8_t
@@ -1035,14 +1034,25 @@ cmd_external_authenticate (void)
static void
cmd_get_challenge (void)
{
int len = apdu.expected_res_size;
DEBUG_INFO (" - GET CHALLENGE\r\n");
if (len > CHALLENGE_LEN)
{
GPG_CONDITION_NOT_SATISFIED ();
return;
}
else if (len == 0)
/* backward compatibility */
len = CHALLENGE_LEN;
if (challenge)
random_bytes_free (challenge);
challenge = random_bytes_get ();
memcpy (res_APDU, challenge, CHALLENGE_LEN);
res_APDU_size = CHALLENGE_LEN;
memcpy (res_APDU, challenge, len);
res_APDU_size = len;
GPG_SUCCESS ();
DEBUG_INFO ("GET CHALLENGE done.\r\n");
}