int
rsa_decrypt (const uint8_t *input, uint8_t *output, int msg_len,
struct key_data *kd)
{
mpi P1, Q1, H;
int r;
int output_len;
DEBUG_INFO ("RSA decrypt:");
DEBUG_WORD ((uint32_t)&output_len);
mpi_init (&P1, &Q1, &H, NULL);
rsa_init (&rsa_ctx, RSA_PKCS_V15, 0);
rsa_ctx.len = msg_len;
DEBUG_WORD (msg_len);
mpi_lset (&rsa_ctx.E, 0x10001);
mpi_read_binary (&rsa_ctx.P, &kd->data[0], KEY_CONTENT_LEN / 2);
mpi_read_binary (&rsa_ctx.Q, &kd->data[KEY_CONTENT_LEN/2],
KEY_CONTENT_LEN / 2);
#if 0 /* Using CRT, we don't use N */
mpi_mul_mpi (&rsa_ctx.N, &rsa_ctx.P, &rsa_ctx.Q);
#endif
mpi_sub_int (&P1, &rsa_ctx.P, 1);
mpi_sub_int (&Q1, &rsa_ctx.Q, 1);
mpi_mul_mpi (&H, &P1, &Q1);
mpi_inv_mod (&rsa_ctx.D , &rsa_ctx.E, &H);
mpi_mod_mpi (&rsa_ctx.DP, &rsa_ctx.D, &P1);
mpi_mod_mpi (&rsa_ctx.DQ, &rsa_ctx.D, &Q1);
mpi_inv_mod (&rsa_ctx.QP, &rsa_ctx.Q, &rsa_ctx.P);
mpi_free (&P1, &Q1, &H, NULL);
DEBUG_INFO ("RSA decrypt ...");
r = rsa_pkcs1_decrypt (&rsa_ctx, RSA_PRIVATE, &output_len,
input, output, MAX_RES_APDU_DATA_SIZE);
rsa_free (&rsa_ctx);
if (r < 0)
{
DEBUG_INFO ("fail:");
DEBUG_SHORT (r);
return r;
}
else
{
res_APDU_size = output_len;
DEBUG_INFO ("done.\r\n");
GPG_SUCCESS ();
return 0;
}
}
static int
cir_getchar (uint32_t timeout)
{
uint16_t cir_addr;
#if defined(DEBUG_CIR)
uint16_t *p;
#endif
#if defined(DEBUG_CIR)
cirinput_p = cirinput;
#endif
cir_ll_init ();
notification = 0;
wait_usec = timeout;
chopstx_usec_wait_var (&wait_usec);
if (notification == 0)
return -1;
/* Sleep 200ms to avoid detecting chatter inputs. */
chopstx_usec_wait (200 * 1000);
#if defined(DEBUG_CIR)
DEBUG_INFO ("****\r\n");
DEBUG_SHORT (intr_ext);
DEBUG_SHORT (intr_trg);
DEBUG_SHORT (intr_ovf);
DEBUG_INFO ("----\r\n");
for (p = cirinput; p < cirinput_p; p++)
{
DEBUG_SHORT (*p);
}
DEBUG_INFO ("====\r\n");
cirinput_p = cirinput;
DEBUG_INFO ("**** CIR data:");
DEBUG_WORD (cir_data);
if (cir_seq > 48)
{
DEBUG_SHORT (cir_data_more);
}
DEBUG_BYTE (cir_seq);
#endif
switch (cir_proto)
{
case CIR_PROTO_RC5:
cir_data &= 0x003f;
goto err;
case CIR_PROTO_RC6:
cir_addr = cir_data >> 8; /* in case of cir_seq == 16. 32??? */
cir_data &= 0x00ff;
return find_char_codetable (cir_data, cir_codetable_dell_mr425);
case CIR_PROTO_NEC:
cir_addr = cir_data&0xffff;
if (cir_addr == CIR_ADDR_TOSHIBA_REGZA)
{
cir_data = (cir_data >> 16) & 0x00ff;
return find_char_codetable (cir_data, cir_codetable_regza);
}
else
goto err;
