Makefile

@@ -27,6 +27,8 @@ install: bitstream.pc
 	@install -m 644 dvb/*.h $(INCLUDE)/dvb
 	@install -d $(INCLUDE)/dvb/si
 	@install -m 644 dvb/si/*.h $(INCLUDE)/dvb/si
+	@install -d $(INCLUDE)/ebu
+	@install -m 644 ebu/*.h $(INCLUDE)/ebu
 	@install -d $(INCLUDE)/ietf
 	@install -m 644 ietf/* $(INCLUDE)/ietf
 	@install -d $(INCLUDE)/ieee

NEWS

+1.6 (TODO)
+=================
+ - Add EBU BISS-CA
+
 1.5 (6 November 2018)
 =================
  - Add SDES

ebu/biss.h

+/*****************************************************************************
+ * biss.h: BISS-CA Entitlement Management Message Table (EMM)
+ *****************************************************************************
+ * Copyright (C) 2018 Open Broadcast Systems Ltd.
+ *
+ * Authors: Rafaël Carré <funman@videolan.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * Normative references:
+ *  - EBU Tech 3292
+ */
+
+#ifndef __BITSTREAM_EBU_BISS_H__
+#define __BITSTREAM_EBU_BISS_H__
+
+#include <bitstream/common.h>
+#include <bitstream/mpeg/psi/psi.h>
+#include <bitstream/mpeg/psi/descriptors.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * Conditional Access Table
+ *****************************************************************************/
+#define BISSCA_EMM_TABLE_ID            0x81
+#define BISSCA_EMM_HEADER_SIZE         PSI_HEADER_SIZE_SYNTAX1
+
+#define BISSCA_EMM_CIPHER_RSA_2048_OAEP    0
+#define BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE  (2048/8)
+#define BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE  (64/8)
+
+static inline void bissca_emm_init(uint8_t *p_emm, uint16_t esid)
+{
+    psi_init(p_emm, true);
+    psi_set_tableid(p_emm, BISSCA_EMM_TABLE_ID);
+    p_emm[1] &= ~0x40;
+    psi_set_tableidext(p_emm, esid);
+    psi_set_section(p_emm, 0);
+    psi_set_lastsection(p_emm, 0);
+    p_emm[BISSCA_EMM_HEADER_SIZE+3] = 0x0f;
+    p_emm[BISSCA_EMM_HEADER_SIZE+4] = 0xf0;
+}
+
+static inline void bissca_emm_set_onid(uint8_t *p_emm, uint16_t onid)
+{
+    p_emm[BISSCA_EMM_HEADER_SIZE] = onid >> 8;
+    p_emm[BISSCA_EMM_HEADER_SIZE+1] = onid & 0xff;
+}
+
+static inline uint16_t bissca_emm_get_onid(const uint8_t *p_emm)
+{
+    return (p_emm[BISSCA_EMM_HEADER_SIZE] << 8) |
+        p_emm[BISSCA_EMM_HEADER_SIZE+1];
+}
+
+static inline void bissca_emm_set_last_table_id(uint8_t *p_emm, uint8_t last_table_id)
+{
+    p_emm[BISSCA_EMM_HEADER_SIZE+2] = last_table_id;
+}
+
+static inline uint8_t bissca_emm_get_last_table_id(const uint8_t *p_emm)
+{
+    return p_emm[BISSCA_EMM_HEADER_SIZE+2];
+}
+
+static inline void bissca_emm_set_emm_cipher_type(uint8_t *p_emm, uint8_t bissca_emm_cipher_type)
+{
+    p_emm[BISSCA_EMM_HEADER_SIZE+3] &= 0x0f;
+    p_emm[BISSCA_EMM_HEADER_SIZE+3] |= (emm_cipher_type << 5);
+}
+
+static inline uint8_t bissca_emm_get_emm_cipher_type(const uint8_t *p_emm)
+{
+    return p_emm[BISSCA_EMM_HEADER_SIZE+3] >> 5;
+}
+
+static inline void bissca_emm_set_entitlement_priv_data_loop(uint8_t *p_emm, bool entitlement_priv_data_loop)
+{
+    p_emm[BISSCA_EMM_HEADER_SIZE+3] &= 0x0f;
+    p_emm[BISSCA_EMM_HEADER_SIZE+3] |= (!!entitlement_priv_data_loop << 4);
+}
+
+static inline bool bissca_emm_get_entitlement_priv_data_loop(const uint8_t *p_emm)
+{
+    return p_emm[BISSCA_EMM_HEADER_SIZE+3] & 0x10;
+}
+
+static inline void bissca_emm_set_length(uint8_t *p_emm, uint16_t i_emm_length)
+{
+    // TODO: take N of loops ?
+    psi_set_length(p_emm, BISSCA_EMM_HEADER_SIZE + 6 + PSI_CRC_SIZE - PSI_HEADER_SIZE
+                    + i_emm_length);
+}
+
+static inline uint16_t bissca_emm_get_desclength(const uint8_t *p_emm)
+{
+    return ((p_emm[BISSCA_EMM_HEADER_SIZE + 4] & 0xf) << 8) |
+        p_emm[BISSCA_EMM_HEADER_SIZE + 5];
+}
+
+static inline void bissca_emm_set_desclength(uint8_t *p_emm, uint16_t i_desc_len)
+{
+    p_emm[BISSCA_EMM_HEADER_SIZE + 4] &= 0xf0;
+    p_emm[BISSCA_EMM_HEADER_SIZE + 4] |= (i_desc_len << 8) & 0xf;
+    p_emm[BISSCA_EMM_HEADER_SIZE + 5] = i_desc_len & 0xff;
+}
+
+static inline uint8_t *bissca_emm_get_descl(uint8_t *p_emm)
+{
+    return p_emm + BISSCA_EMM_HEADER_SIZE + 6;
+}
+
+static inline const uint8_t *bissca_emm_get_descl_const(const uint8_t *p_emm)
+{
+    return p_emm + BISSCA_EMM_HEADER_SIZE + 6;
+}
+
+static inline uint8_t *bissca_emm_get_emmn(uint8_t *p_emm, int n)
+{
+    uint16_t i_section_size = psi_get_length(p_emm) + PSI_HEADER_SIZE
+                               - PSI_CRC_SIZE;
+    uint8_t *p_emm_n = p_emm + BISSCA_EMM_HEADER_SIZE + 6 + bissca_emm_get_desclength(p_emm);
+    if (p_emm_n - p_emm > i_section_size) return NULL;
+    bool priv = bissca_emm_get_entitlement_priv_data_loop(p_emm);
+
+    while (n) {
+        if (p_emm_n + BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE + BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE - p_emm > i_section_size) return NULL;
+        p_emm_n += BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE + BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE;
+        if (priv) {
+            if (p_emm_n + DESCS_HEADER_SIZE - p_emm > i_section_size) return NULL;
+            uint16_t desc_len = descs_get_length(p_emm_n);
+            if (p_emm_n + DESCS_HEADER_SIZE + desc_len - p_emm > i_section_size) return NULL;
+            p_emm_n += DESCS_HEADER_SIZE + desc_len;
+        }
+        n--;
+    }
+    if (p_emm_n - p_emm >= i_section_size) return NULL;
+    return p_emm_n;
+}
+
+static inline void bissca_emmn_get_ekid(uint8_t *p_emm_n, uint8_t ekid[BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE])
+{
+    memcpy(ekid, p_emm_n, BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE);
+}
+
+static inline void bissca_emmn_set_ekid(uint8_t *p_emm_n, const uint8_t ekid[BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE])
+{
+    memcpy(p_emm_n, ekid, BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE);
+}
+
+static inline void bissca_emmn_get_esd(uint8_t *p_emm_n, uint8_t esd[BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE])
+{
+    memcpy(esd, &p_emm_n[BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE], BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE);
+}
+
+static inline void bissca_emmn_set_esd(uint8_t *p_emm_n, const uint8_t esd[BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE])
+{
+    memcpy(&p_emm_n[BISSCA_EMM_RSA_2048_OAEP_EKID_SIZE], esd, BISSCA_EMM_RSA_2048_OAEP_ESD_SIZE);
+}
+
+static inline bool bissca_emm_validate(const uint8_t *p_emm)
+{
+    uint16_t i_section_size = psi_get_length(p_emm) + PSI_HEADER_SIZE
+                               - PSI_CRC_SIZE;
+
+    if (!psi_get_syntax(p_emm) || psi_get_section(p_emm)
+         || psi_get_lastsection(p_emm)
+         || psi_get_tableid(p_emm) != BISSCA_EMM_TABLE_ID)
+        return false;
+
+    if (i_section_size < BISSCA_EMM_HEADER_SIZE + 6
+         || i_section_size < BISSCA_EMM_HEADER_SIZE + 6 + bissca_emm_get_desclength(p_emm))
+        return false;
+
+    if (!descl_validate(emm_get_descl_const(p_emm), bissca_emm_get_desclength(p_emm)))
+        return false;
+
+    // TODO: validate RSA loop ?
+
+    return true;
+}
+
+static inline bool bissca_emm_table_validate(uint8_t **pp_sections)
+{
+    uint8_t i_last_section = psi_table_get_lastsection(pp_sections);
+    uint8_t i;
+
+    for (i = 0; i <= i_last_section; i++) {
+        uint8_t *p_section = psi_table_get_section(pp_sections, i);
+
+        if (!psi_check_crc(p_section))
+            return false;
+    }
+
+    return true;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif