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cwc: Cryptoworks - re-compose the EMM-S (shared) messages

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The newcamd server expects composed EMM-S messages from 0x84 (EMM-SH)
and 0x84 (EMM-SB).

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2012-04-10 14:32:11 +02:00
parent da4c28b981
commit a06ee6d175
1 changed files with 38 additions and 3 deletions
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41
src/cwc.c
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@ -244,6 +244,7 @@ typedef struct cwc {
int shared_len;
uint8_t * shared_emm;
} cwc_viaccess_emm;
#define cwc_cryptoworks_emm cwc_viaccess_emm
/* Card type */
card_type_t cwc_card_type;
@ -1673,10 +1674,44 @@ cwc_emm_cryptoworks(cwc_t *cwc, uint8_t *data, int len)
case 0x82: /* unique */
match = len >= 10 && memcmp(data + 5, cwc->cwc_ua + 3, 5) == 0;
break;
case 0x84: /* shared */
match = len >= 9 && memcmp(data + 5, cwc->cwc_ua + 3, 4) == 0;
case 0x84: /* emm-sh */
if (len >= 9 && memcmp(data + 5, cwc->cwc_ua + 3, 4) == 0) {
if (cwc->cwc_cryptoworks_emm.shared_emm) {
free(cwc->cwc_cryptoworks_emm.shared_emm);
cwc->cwc_cryptoworks_emm.shared_len = 0;
cwc->cwc_cryptoworks_emm.shared_emm = (uint8_t *)malloc(len);
}
cwc->cwc_cryptoworks_emm.shared_emm = malloc(len);
if (cwc->cwc_cryptoworks_emm.shared_emm) {
cwc->cwc_cryptoworks_emm.shared_len = len;
memcpy(cwc->cwc_cryptoworks_emm.shared_emm, data, len);
printf("emm-sh[%04x]: loaded\n", cwc->cwc_caid);
}
}
break;
case 0x86: /* emm-sb */
if (cwc->cwc_cryptoworks_emm.shared_emm) {
/* python: EMM_SH[0:12] + EMM_SB[5:-1] + EMM_SH[12:-1] */
uint32_t elen = len - 5 + cwc->cwc_cryptoworks_emm.shared_len - 12;
uint8_t *tmp = malloc(elen);
uint8_t *composed = tmp ? malloc(elen + 12) : NULL;
if (composed) {
printf("emm-sb[%04x]: composed\n", cwc->cwc_caid);
memcpy(tmp, data + 5, len - 5);
memcpy(tmp + len - 5, cwc->cwc_cryptoworks_emm.shared_emm + 12,
cwc->cwc_cryptoworks_emm.shared_len - 12);
memcpy(composed, cwc->cwc_cryptoworks_emm.shared_emm, 12);
sort_nanos(composed + 12, tmp, elen);
composed[1] = ((elen + 9) >> 8) | 0x70;
composed[2] = (elen + 9) & 0xff;
cwc_send_msg(cwc, composed, elen + 12, 0, 1);
free(composed);
free(tmp);
}
cwc->cwc_cryptoworks_emm.shared_emm = NULL;
cwc->cwc_cryptoworks_emm.shared_len = 0;
}
break;
case 0x86: /* shared header */
case 0x88: /* global */
case 0x89: /* global */
match = 1;