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fix TCOS decipher operation 

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@1808 c6295689-39f2-0310-b995-f0e70906c6a9
This commit is contained in:
nils 2004-06-30 17:26:05 +00:00
parent 9fc8b4376a
commit 84f08c9544
1 changed files with 68 additions and 1 deletions
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69
src/libopensc/card-tcos.c
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@ -25,6 +25,7 @@
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <stdlib.h>
static const char *tcos_atrs[] = {
"3B:BA:13:00:81:31:86:5D:00:64:05:0A:02:01:31:80:90:00:8B", /* SLE44 */
@ -42,9 +43,13 @@ static struct sc_card_driver tcos_drv = {
static const struct sc_card_operations *iso_ops = NULL;
typedef struct tcos_data_st {
unsigned int pad_flags;
} tcos_data;
static int tcos_finish(struct sc_card *card)
{
free(card->drv_data);
return 0;
}
@ -76,8 +81,12 @@ static int tcos_init(struct sc_card *card)
{
unsigned long flags;
tcos_data *data = malloc(sizeof(tcos_data));
if (!data)
return SC_ERROR_OUT_OF_MEMORY;
card->name = "TCOS";
card->drv_data = NULL;
card->drv_data = (void *)data;
card->cla = 0x00;
flags = SC_ALGORITHM_RSA_RAW;
@ -623,6 +632,8 @@ static int tcos_set_security_env(struct sc_card *card,
case SC_SEC_OPERATION_DECIPHER:
apdu.p1 = 0xC1;
apdu.p2 = 0xB8;
/* save padding flags */
((tcos_data *)card->drv_data)->pad_flags = env->algorithm_flags;
break;
default:
return SC_ERROR_INVALID_ARGUMENTS;
@ -683,6 +694,61 @@ static int tcos_restore_security_env(struct sc_card *card, int se_num)
return 0;
}
/**
* TCOS decipher command (same as iso7816_decipher besides setting
* the padding byte).
*/
static int tcos_decipher(struct sc_card *card,
const u8 * crgram, size_t crgram_len,
u8 * out, size_t outlen)
{
int r;
struct sc_apdu apdu;
tcos_data *xdata;
u8 pad_byte;
u8 rbuf[SC_MAX_APDU_BUFFER_SIZE];
u8 sbuf[SC_MAX_APDU_BUFFER_SIZE];
assert(card != NULL && crgram != NULL && out != NULL);
SC_FUNC_CALLED(card->ctx, 2);
if (crgram_len > 255)
SC_FUNC_RETURN(card->ctx, 2, SC_ERROR_INVALID_ARGUMENTS);
/* INS: 0x2A PERFORM SECURITY OPERATION
* P1: 0x80 Resp: Plain value
* P2: 0x86 Cmd: Padding indicator byte followed by cryptogram */
sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0x2A, 0x80, 0x86);
apdu.resp = rbuf;
apdu.resplen = sizeof(rbuf);
apdu.le = crgram_len;
apdu.sensitive = 1;
xdata = (tcos_data *)card->drv_data;
if (xdata->pad_flags & SC_ALGORITHM_RSA_PAD_PKCS1)
pad_byte = 0x81; /* pkcs1 padding */
else
pad_byte = 0x02; /* no padding */
/* Note: the 'ISO' padding (0x80, 0x00, 0x00 ...) supported
* by TCOS cards is ignored here as OpenSC doesn't support it
* -- Nils
*/
sbuf[0] = pad_byte;
memcpy(sbuf + 1, crgram, crgram_len);
apdu.data = sbuf;
apdu.lc = crgram_len + 1;
apdu.datalen = crgram_len + 1;
r = sc_transmit_apdu(card, &apdu);
SC_TEST_RET(card->ctx, r, "APDU transmit failed");
if (apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {
int len = apdu.resplen > outlen ? outlen : apdu.resplen;
memcpy(out, apdu.resp, len);
SC_FUNC_RETURN(card->ctx, 2, len);
}
SC_FUNC_RETURN(card->ctx, 2, sc_check_sw(card, apdu.sw1, apdu.sw2));
}
/* Issue the SET PERMANENT command. With ENABLE_NULLPIN set the
NullPIN method will be activated, otherwise the permanent operation
@ -731,6 +797,7 @@ static struct sc_card_driver * sc_get_driver(void)
tcos_ops.list_files = tcos_list_files;
tcos_ops.delete_file = tcos_delete_file;
tcos_ops.set_security_env = tcos_set_security_env;
tcos_ops.decipher = tcos_decipher;
tcos_ops.restore_security_env = tcos_restore_security_env;
tcos_ops.card_ctl = tcos_card_ctl;