From 9479f145521bbae872723ed6fdb7d4bace73c145 Mon Sep 17 00:00:00 2001 From: Carles Fernandez Date: Tue, 13 Jun 2023 13:36:30 +0200 Subject: [PATCH] Read MACK key --- src/core/libs/osnma_msg_receiver.cc | 89 ++++++++++++++++++++----- src/core/libs/osnma_msg_receiver.h | 6 +- src/core/system_parameters/osnma_data.h | 1 - 3 files changed, 74 insertions(+), 22 deletions(-) diff --git a/src/core/libs/osnma_msg_receiver.cc b/src/core/libs/osnma_msg_receiver.cc index 8f7b82051..6028506c5 100644 --- a/src/core/libs/osnma_msg_receiver.cc +++ b/src/core/libs/osnma_msg_receiver.cc @@ -305,7 +305,7 @@ void osnma_msg_receiver::process_dsm_message(const std::vector& dsm_msg { MSG.push_back(dsm_msg[i]); } - + std::vector message = MSG; for (uint16_t k = 0; k < l_ds_bytes; k++) { MSG.push_back(d_osnma_data.d_dsm_kroot_message.ds[k]); @@ -334,12 +334,20 @@ void osnma_msg_receiver::process_dsm_message(const std::vector& dsm_msg // check DS signature if (d_osnma_data.d_dsm_kroot_message.p_dk == p_dk_truncated) { + bool authenticated = d_crypto->verify_signature(message, d_osnma_data.d_dsm_kroot_message.ds); LOG(WARNING) << "OSNMA: DSM-KROOT message received ok."; std::cout << "Galileo OSNMA: KROOT with CID=" << static_cast(d_osnma_data.d_nma_header.cid) << ", PKID=" << static_cast(d_osnma_data.d_dsm_kroot_message.pkid) << ", WN=" << static_cast(d_osnma_data.d_dsm_kroot_message.wn_k) - << ", TOW=" << static_cast(d_osnma_data.d_dsm_kroot_message.towh_k) * 3600 - << " validated" << std::endl; + << ", TOW=" << static_cast(d_osnma_data.d_dsm_kroot_message.towh_k) * 3600; + if (authenticated) + { + std::cout << " authenticated" << std::endl; + } + else + { + std::cout << " validated" << std::endl; + } std::cout << "Galileo OSNMA: NMA Status is " << d_dsm_reader->get_nmas_status(d_osnma_data.d_nma_header.nmas) << ", " << "Chain in force is " << static_cast(d_osnma_data.d_nma_header.cid) << ", " << "Chain and Public Key Status is " << d_dsm_reader->get_cpks_status(d_osnma_data.d_nma_header.cpks) << std::endl; @@ -428,9 +436,8 @@ void osnma_msg_receiver::read_mack_block(const std::shared_ptr& osnma if (d_osnma_data.d_dsm_kroot_message.ts != 0) { read_mack_header(); - read_mack_info_and_tags(); - read_mack_key(); - read_mack_padding(); + read_mack_body(); + d_old_mack_message = d_osnma_data.d_mack_message; } } @@ -496,7 +503,7 @@ void osnma_msg_receiver::read_mack_header() } -void osnma_msg_receiver::read_mack_info_and_tags() +void osnma_msg_receiver::read_mack_body() { uint8_t lt_bits = 0; const auto it = OSNMA_TABLE_11.find(d_osnma_data.d_dsm_kroot_message.ts); @@ -518,7 +525,7 @@ void osnma_msg_receiver::read_mack_info_and_tags() { return; } - uint16_t nt = std::floor((480.0 + float(lk_bits)) / (float(lt_bits) + 16.0)); + uint16_t nt = std::floor((480.0 - float(lk_bits)) / (float(lt_bits) + 16.0)); d_osnma_data.d_mack_message.tag_and_info = std::vector(nt - 1); for (uint16_t k = 0; k < (nt - 1); k++) { @@ -537,6 +544,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += d_mack_message[6 + step]; ADKD += ((d_mack_message[7 + step] & 0xF0) >> 4); cop += (d_mack_message[7 + step] & 0x0F); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = d_mack_message[8 + step + j]; + } + } } else { @@ -547,6 +562,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += (d_mack_message[6 + step] & 0xF0) >> 4; ADKD += (d_mack_message[6 + step] & 0x0F); cop += (d_mack_message[7 + step] & 0xF0) >> 4; + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = ((d_mack_message[7 + step + j] & 0x0F) << 4) + ((d_mack_message[8 + step + j] & 0xF0) >> 4); + } + } } } else if (lt_bits == 24) @@ -557,6 +580,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += d_mack_message[8 + k * 5]; ADKD += ((d_mack_message[9 + k * 5] & 0xF0) >> 4); cop += (d_mack_message[9 + k * 5] & 0x0F); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = d_mack_message[10 + k * 5 + j]; + } + } } else if (lt_bits == 28) { @@ -570,6 +601,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += d_mack_message[9 + step]; ADKD += ((d_mack_message[10 + step] & 0xF0) >> 4); cop += (d_mack_message[10 + step] & 0x0F); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = d_mack_message[11 + step + j]; + } + } } else { @@ -581,6 +620,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += ((d_mack_message[9 + step] & 0xF0) >> 4); ADKD += (d_mack_message[9 + step] & 0x0F); cop += ((d_mack_message[10 + step] & 0xF0) >> 4); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = ((d_mack_message[10 + step + j] & 0x0F) << 4) + ((d_mack_message[11 + step + j] & 0xF0) >> 4); + } + } } } else if (lt_bits == 32) @@ -592,6 +639,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += d_mack_message[10 + k * 6]; ADKD += ((d_mack_message[11 + k * 6] & 0xF0) >> 4); cop += (d_mack_message[11 + k * 6] & 0x0F); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = d_mack_message[12 + k * 6 + j]; + } + } } else if (lt_bits == 40) { @@ -603,6 +658,14 @@ void osnma_msg_receiver::read_mack_info_and_tags() PRN_d += d_mack_message[12 + k * 7]; ADKD += ((d_mack_message[13 + k * 7] & 0xF0) >> 4); cop += (d_mack_message[13 + k * 7] & 0x0F); + if (k == (nt - 2)) + { + d_osnma_data.d_mack_message.key = std::vector(d_osnma_data.d_dsm_kroot_message.kroot.size()); + for (size_t j = 0; j < d_osnma_data.d_dsm_kroot_message.kroot.size(); j++) + { + d_osnma_data.d_mack_message.key[j] = d_mack_message[14 + k * 7 + j]; + } + } } d_osnma_data.d_mack_message.tag_and_info[k].tag = tag; d_osnma_data.d_mack_message.tag_and_info[k].tag_info.PRN_d = PRN_d; @@ -610,13 +673,3 @@ void osnma_msg_receiver::read_mack_info_and_tags() d_osnma_data.d_mack_message.tag_and_info[k].tag_info.cop = cop; } } - - -void osnma_msg_receiver::read_mack_key() -{ -} - - -void osnma_msg_receiver::read_mack_padding() -{ -} diff --git a/src/core/libs/osnma_msg_receiver.h b/src/core/libs/osnma_msg_receiver.h index bf8a87b10..328e3d8d9 100644 --- a/src/core/libs/osnma_msg_receiver.h +++ b/src/core/libs/osnma_msg_receiver.h @@ -67,9 +67,9 @@ private: void process_dsm_message(const std::vector& dsm_msg, const std::shared_ptr& osnma_msg); void read_mack_header(); - void read_mack_info_and_tags(); - void read_mack_key(); - void read_mack_padding(); + void read_mack_body(); + + MACK_message d_old_mack_message; std::unique_ptr d_dsm_reader; std::unique_ptr d_crypto; diff --git a/src/core/system_parameters/osnma_data.h b/src/core/system_parameters/osnma_data.h index 315848a70..890eeb3a5 100644 --- a/src/core/system_parameters/osnma_data.h +++ b/src/core/system_parameters/osnma_data.h @@ -116,7 +116,6 @@ public: MACK_header header; std::vector tag_and_info; std::vector key; - std::vector padding; }; /*!