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OpenPGPcard spec v3.0 change

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NIIBE Yutaka
2015-06-02 20:46:30 +09:00
parent 16149ff960
commit bd02cbfdb0
2 changed files with 17 additions and 4 deletions
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17
src/openpgp.c
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@@ -1,7 +1,7 @@
/*
* openpgp.c -- OpenPGP card protocol support
*
* Copyright (C) 2010, 2011, 2012, 2013, 2014
* Copyright (C) 2010, 2011, 2012, 2013, 2014, 2015
* Free Software Initiative of Japan
* Author: NIIBE Yutaka <gniibe@fsij.org>
*
@@ -812,6 +812,8 @@ cmd_get_data (void)
#define EDDSA_HASH_LEN_MAX 256
#define EDDSA_SIGNATURE_LENGTH 64
#define ECC_CIPHER_DO_HEADER_SIZE 7
static void
cmd_pso (void)
{
@@ -940,8 +942,15 @@ cmd_pso (void)
}
else if (attr == ALGO_NISTP256R1 || attr == ALGO_SECP256K1)
{
int header_size = -1;
if (len == 65)
header_size = 0;
else if (len == 65 + ECC_CIPHER_DO_HEADER_SIZE)
header_size = ECC_CIPHER_DO_HEADER_SIZE;
/* Format is in big endian MPI: 04 || x || y */
if (len != 65 || apdu.cmd_apdu_data[0] != 4)
if (header_size < 0 || apdu.cmd_apdu_data[header_size] != 4)
{
GPG_CONDITION_NOT_SATISFIED ();
return;
@@ -949,10 +958,10 @@ cmd_pso (void)
result_len = 65;
if (attr == ALGO_NISTP256R1)
r = ecdh_decrypt_p256r1 (apdu.cmd_apdu_data, res_APDU,
r = ecdh_decrypt_p256r1 (apdu.cmd_apdu_data + header_size, res_APDU,
kd[GPG_KEY_FOR_DECRYPTION].data);
else
r = ecdh_decrypt_p256k1 (apdu.cmd_apdu_data, res_APDU,
r = ecdh_decrypt_p256k1 (apdu.cmd_apdu_data + header_size, res_APDU,
kd[GPG_KEY_FOR_DECRYPTION].data);
}
else