mirror of
https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-14 04:00:34 +00:00
Improve SHA256 computation
This commit is contained in:
Carles Fernandez
parent
7147959186
commit
9de1fd39ca
@ -22,7 +22,6 @@ set(CORE_LIBS_SOURCES
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nav_message_udp_sink.cc
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galileo_tow_map.cc
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osnma_msg_receiver.cc
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sha256.cc
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)
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set(CORE_LIBS_HEADERS
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@ -40,7 +39,6 @@ set(CORE_LIBS_HEADERS
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nav_message_monitor.h
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galileo_tow_map.h
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osnma_msg_receiver.h
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sha256.h
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)
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if(ENABLE_FPGA)
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@ -104,6 +102,21 @@ target_link_libraries(core_libs
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Pugixml::pugixml
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)
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target_link_libraries(core_libs
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PRIVATE
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${GNUTLS_LIBRARIES}
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${GNUTLS_OPENSSL_LIBRARY}
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)
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target_include_directories(core_libs
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PRIVATE
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${GNUTLS_INCLUDE_DIR}
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)
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if(OPENSSL_FOUND)
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target_compile_definitions(core_libs PRIVATE -DUSE_OPENSSL_FALLBACK=1)
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endif()
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if(USE_GENERIC_LAMBDAS AND NOT GNURADIO_USES_STD_POINTERS)
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target_link_libraries(core_libs PUBLIC Boost::headers)
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else()
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@ -31,7 +31,6 @@
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#include <string>
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#include <typeinfo> // for typeid
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#if HAS_GENERIC_LAMBDA
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#else
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#include <boost/bind/bind.hpp>
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@ -45,6 +44,13 @@ namespace wht = boost;
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namespace wht = std;
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#endif
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#if USE_OPENSSL_FALLBACK
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#include <openssl/sha.h>
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#else
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#include <gnutls/crypto.h>
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#include <gnutls/gnutls.h>
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#endif
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osnma_msg_receiver_sptr osnma_msg_receiver_make()
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{
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return osnma_msg_receiver_sptr(new osnma_msg_receiver());
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@ -202,17 +208,17 @@ void osnma_msg_receiver::process_dsm_message(const std::vector<uint8_t>& dsm_msg
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LOG(WARNING) << "OSNMA: DSM-KROOT message received.";
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// DSM-KROOT message
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d_osnma_data.d_dsm_kroot_message.nb_dk = get_number_blocks_index(dsm_msg[0]);
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d_osnma_data.d_dsm_kroot_message.pkid = get_pkid(dsm_msg); // (dsm_msg[0] & 0b00001111);
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d_osnma_data.d_dsm_kroot_message.cidkr = get_cidkr(dsm_msg); // (dsm_msg[1] & 0b11000000) >> 6;
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d_osnma_data.d_dsm_kroot_message.reserved1 = get_dsm_reserved1(dsm_msg); // (dsm_msg[1] & 0b00110000) >> 4;
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d_osnma_data.d_dsm_kroot_message.hf = get_hf(dsm_msg); // (dsm_msg[1] & 0b00001100) >> 2;
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d_osnma_data.d_dsm_kroot_message.mf = get_mf(dsm_msg); // (dsm_msg[1] & 0b00000011);
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d_osnma_data.d_dsm_kroot_message.ks = get_ks(dsm_msg); // (dsm_msg[2] & 0b11110000) >> 4;
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d_osnma_data.d_dsm_kroot_message.ts = get_ts(dsm_msg); // (dsm_msg[2] & 0b00001111);
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d_osnma_data.d_dsm_kroot_message.maclt = get_maclt(dsm_msg); // dsm_msg[3];
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d_osnma_data.d_dsm_kroot_message.reserved = get_dsm_reserved(dsm_msg); // (dsm_msg[4] & 0b11110000) >> 4;
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d_osnma_data.d_dsm_kroot_message.wn_k = get_wn_k(dsm_msg); // static_cast<uint16_t>((dsm_msg[4] & 0b00001111) << 8) + static_cast<uint16_t>(dsm_msg[5]);
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d_osnma_data.d_dsm_kroot_message.towh_k = get_towh_k(dsm_msg); // dsm_msg[6];
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d_osnma_data.d_dsm_kroot_message.pkid = get_pkid(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.cidkr = get_cidkr(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.reserved1 = get_dsm_reserved1(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.hf = get_hf(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.mf = get_mf(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.ks = get_ks(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.ts = get_ts(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.maclt = get_maclt(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.reserved = get_dsm_reserved(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.wn_k = get_wn_k(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.towh_k = get_towh_k(dsm_msg);
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d_osnma_data.d_dsm_kroot_message.alpha = get_alpha(dsm_msg);
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uint16_t bytes_lk = get_lk_bits(d_osnma_data.d_dsm_kroot_message.ks) / 8;
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@ -254,12 +260,12 @@ void osnma_msg_receiver::process_dsm_message(const std::vector<uint8_t>& dsm_msg
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{
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M.push_back(dsm_msg[13 + bytes_lk + k]);
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}
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sha256.update(&M[0], M.size());
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uint8_t* digest = sha256.digest();
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std::vector<uint8_t> hash = computeSHA256(M);
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std::vector<uint8_t> p_dk_computed;
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for (uint16_t i = 0; i < l_pdk_bytes; i++)
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{
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p_dk_computed.push_back(digest[i]);
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p_dk_computed.push_back(hash[i]);
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}
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if (d_osnma_data.d_dsm_kroot_message.p_dk == p_dk_computed)
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{
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@ -365,4 +371,30 @@ void osnma_msg_receiver::read_mack_key()
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void osnma_msg_receiver::read_mack_padding()
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{
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}
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}
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std::vector<uint8_t> osnma_msg_receiver::computeSHA256(const std::vector<uint8_t>& input)
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{
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std::vector<uint8_t> output_vector{32};
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uint8_t output[32];
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const uint8_t* input_ptr = input.data();
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size_t inputLength = input.size();
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#if USE_OPENSSL_FALLBACK
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SHA256_CTX sha256Context;
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SHA256_Init(&sha256Context);
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SHA256_Update(&sha256Context, input_ptr, inputLength);
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SHA256_Final(output, &sha256Context);
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#else
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gnutls_hash_hd_t hashHandle;
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gnutls_hash_init(&hashHandle, GNUTLS_DIG_SHA256);
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gnutls_hash(hashHandle, input_ptr, inputLength);
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gnutls_hash_output(hashHandle, output);
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gnutls_hash_deinit(hashHandle, output);
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#endif
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for (int i = 0; i < 32; i++)
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{
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output_vector[i] = output[i];
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}
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return output_vector;
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}
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@ -22,11 +22,10 @@
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#include "galileo_inav_message.h" // for OSNMA_msg
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#include "gnss_block_interface.h" // for gnss_shared_ptr
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#include "osnma_data.h" // for OSNMA_data
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#include "sha256.h"
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#include <gnuradio/block.h> // for gr::block
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#include <pmt/pmt.h> // for pmt::pmt_t
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#include <array> // for std::array
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#include <memory> // for std::shared_ptr
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#include <gnuradio/block.h> // for gr::block
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#include <pmt/pmt.h> // for pmt::pmt_t
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#include <array> // for std::array
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#include <memory> // for std::shared_ptr
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#include <vector>
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/** \addtogroup Core
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@ -67,7 +66,8 @@ private:
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void read_mack_info_and_tags();
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void read_mack_key();
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void read_mack_padding();
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SHA256 sha256;
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std::vector<uint8_t> computeSHA256(const std::vector<uint8_t>& input);
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std::array<std::array<uint8_t, 256>, 16> d_dsm_message{};
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std::array<std::array<uint8_t, 16>, 16> d_dsm_id_received{};
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@ -308,7 +308,7 @@ uint16_t get_lk_bits(uint8_t ks)
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std::vector<uint8_t> get_kroot(const std::vector<uint8_t>& dsm_msg, uint16_t bytes_lk)
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{
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std::vector<uint8_t> kroot = std::vector<uint8_t>(bytes_lk, 0);
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if (dsm_msg.size() > 13 + bytes_lk)
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if (dsm_msg.size() > static_cast<uint64_t>(13 + bytes_lk))
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{
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for (uint16_t k = 0; k < bytes_lk; k++)
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{
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