endif
ifeq ($(FFDECSA-yes),yes)
-SRCS-yes += src/descrambler/ffdecsa/ffdecsa_interface.c \
- src/descrambler/ffdecsa/ffdecsa_int.c
-SRCS-${CONFIG_MMX} += src/descrambler/ffdecsa/ffdecsa_mmx.c
-SRCS-${CONFIG_SSE2} += src/descrambler/ffdecsa/ffdecsa_sse2.c
-${BUILDDIR}/src/descrambler/ffdecsa/ffdecsa_mmx.o : CFLAGS += -mmmx
-${BUILDDIR}/src/descrambler/ffdecsa/ffdecsa_sse2.o : CFLAGS += -msse2
+SRCS-yes += src/descrambler/libaesdec/libaesdec_interface.c \
+ src/descrambler/libaesdec/libaesdec.c
+${BUILDDIR}/src/descrambler/libaesdec/libaesdec.o : CFLAGS += -msse2
endif
# File bundles
#include "descrambler.h"
#include "cwc.h"
#include "capmt.h"
-#include "ffdecsa/FFdecsa.h"
+#include "libaesdec/libaesdec.h"
#include "input.h"
#include "tvhcsa.h"
capmt_init();
#endif
#if (ENABLE_CWC || ENABLE_CAPMT) && !ENABLE_DVBCSA
- ffdecsa_init();
+ libaesdec_init();
#endif
}
--- /dev/null
+/*
+ * libaesdec.c
+ *
+ * Created on: Jun 22, 2014
+ * Author: root
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "openssl/aes.h"
+
+#include "libaesdec.h"
+
+struct aes_keys_t {
+ AES_KEY even;
+ AES_KEY odd;
+};
+
+void aes_set_even_control_word(void *keys, const unsigned char *pk) {
+ //AES_set_decrypt_key(pk, 128, &((struct aes_keys_t *) keys)->even);
+}
+
+void aes_set_odd_control_word(void *keys, const unsigned char *pk) {
+ //AES_set_decrypt_key(pk, 128, &((struct aes_keys_t *) keys)->odd);
+}
+
+//-----set control words
+void aes_set_control_words(void *keys, const unsigned char *ev,
+ const unsigned char *od) {
+ unsigned char key[16];
+ memcpy(key, ev, 8);
+ memcpy(key + 8, od, 8);
+ AES_set_decrypt_key(key, 128, &((struct aes_keys_t *) keys)->even);
+}
+
+//-----key structure
+
+void *aes_get_key_struct(void) {
+ struct aes_keys_t *keys = (struct aes_keys_t *) malloc(
+ sizeof(struct aes_keys_t));
+ if (keys) {
+ static const unsigned char pk[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+ aes_set_control_words(keys, pk, pk);
+ }
+ return keys;
+}
+
+void aes_free_key_struct(void *keys) {
+ return free(keys);
+}
+
+//----- decrypt
+
+void aes_decrypt_packet(void *keys, unsigned char *packet) {
+ unsigned char *pkt;
+ int xc0, len, offset, n;
+
+ pkt = packet;
+ AES_KEY k;
+
+ // TODO check all flags
+ xc0 = pkt[3] & 0xc0;
+
+ if (xc0 == 0x00) {//skip clear pkt
+ return;
+ }
+ if (xc0 == 0x40) { //skip reserved pkt
+ return;
+ }
+
+ if (xc0 == 0x80 || xc0 == 0xc0) { // encrypted
+ pkt[3] &= 0x3f; // consider it decrypted now
+ if (pkt[3] & 0x20) { // incomplete packet
+ offset = 4 + pkt[4] + 1;
+ len = 188 - offset;
+ n = len >> 3;
+ //residue = len - (n << 3);
+ if (n == 0) { // decrypted==encrypted!
+ //DBG(fprintf(stderr,"DECRYPTED MINI!\n"));
+ return; // this doesn't need more processing
+ }
+ return; // TODO Handle incomplete packets?
+ }
+ }
+ else {
+ return;
+ }
+
+ k = ((struct aes_keys_t *) keys)->even;
+
+ // TODO room for improvement?
+ int i;
+ for (i = 4; i <= 164; i += 16) {
+ AES_ecb_encrypt(pkt + i, pkt + i, &k, AES_DECRYPT);
+ }
+ return;
+}
--- /dev/null
+/*
+ * libaesdec.h
+ *
+ * Created on: Jun 22, 2014
+ * Author: root
+ */
+
+#ifndef LIBAESDEC_H_
+#define LIBAESDEC_H_
+
+void libaesdec_init(void);
+int get_internal_parallelism(void);
+int get_suggested_cluster_size(void);
+void * get_key_struct(void);
+void free_key_struct(void *keys);
+void set_even_control_word(void *keys, const unsigned char *even);
+void set_odd_control_word(void *keys, const unsigned char *odd);
+int decrypt_packets(void *keys, unsigned char **cluster);
+
+// -- alloc & free the key structure
+void *aes_get_key_struct(void);
+void aes_free_key_struct(void *keys);
+
+// -- set aes keys, 16 bytes each
+void aes_set_control_words(void *keys, const unsigned char *even, const unsigned char *odd);
+
+// -- set even aes key, 16 bytes
+void aes_set_even_control_word(void *keys, const unsigned char *even);
+
+// -- set odd aes key, 16 bytes
+void aes_set_odd_control_word(void *keys, const unsigned char *odd);
+
+// -- get aes keys, 16 bytes each
+//void get_control_words(void *keys, unsigned char *even, unsigned char *odd);
+
+// -- decrypt TS packet
+void aes_decrypt_packet(void *keys, unsigned char *packet);
+
+
+#endif /* LIBAESDEC_H_ */
--- /dev/null
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "tvheadend.h"
+#include "libaesdec.h"
+
+
+void libaesdec_init(void) {
+ tvhlog(LOG_INFO, "CSA", "Using AES descrambling");
+}
+
+int get_internal_parallelism(void) {
+ return 0;
+}
+int get_suggested_cluster_size(void) {
+ return 1;
+}
+
+void *
+get_key_struct(void) {
+ return aes_get_key_struct();
+}
+void free_key_struct(void *keys) {
+ aes_free_key_struct(keys);
+}
+
+void set_even_control_word(void *keys, const unsigned char *even) {
+ aes_set_even_control_word(keys, even);
+}
+
+void set_odd_control_word(void *keys, const unsigned char *odd) {
+ aes_set_even_control_word(keys, odd);
+}
+
+int decrypt_packets(void *keys, unsigned char **cluster) {
+ aes_decrypt_packet(keys, cluster[0]);
+ return 1;
+}
projects / thirdparty / tvheadend.git / commitdiff
