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