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#include <chrono>
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include "security_services.hh"
#include "EtsiTs103097Codec_ToBeSignedData.hh"
#include "EtsiTs103097Codec_Data.hh"
#include "sha256.hh"
#include "sha384.hh"
#include "ec_keys.hh"
#include "Params.hh"
#include "loggers.hh"
#include "converter.hh"
security_services * security_services::instance = NULL;
security_services::security_services() : _ec_keys(nullptr), _security_db(nullptr) {
loggers::get_instance().log(">>> security_services::security_services");
} // End of ctor
int security_services::setup(Params& p_params) {
loggers::get_instance().log("security_services::setup");
p_params.log();
_security_db.reset(new security_db(p_params[Params::sec_db_path]));
if (_security_db.get() == nullptr) { // Memory allocation issue
return -1;
}
return 0;
}
int security_services::verify_and_extract_gn_payload(const OCTETSTRING& p_secured_gn_payload, const bool p_verify, OCTETSTRING& p_unsecured_gn_payload, Params& p_params) {
loggers::get_instance().log_msg(">>> security_services::verify_and_extract_gn_payload: ", p_secured_gn_payload);
// Sanity checks
if (p_secured_gn_payload.lengthof() == 0) {
return -1;
}
// Decode the secured message (OER encoding)
IEEE1609dot2::Ieee1609Dot2Data ieee_1609dot2_data;
EtsiTs103097Codec_Data codec;
codec.decode(p_secured_gn_payload, ieee_1609dot2_data, &p_params);
if (!ieee_1609dot2_data.is_bound()) {
return -1;
}
if (p_verify && ((unsigned int)(int)ieee_1609dot2_data.protocolVersion() != security_services::ProtocolVersion)) {
return -2;
}
return process_ieee_dot2_content(ieee_1609dot2_data.content(), p_verify, p_unsecured_gn_payload, p_params);
} // End of method verify_and_extract_gn_payload
int security_services::process_ieee_dot2_content(const IEEE1609dot2::Ieee1609Dot2Content& p_ieee_1609_dot2_content, const bool p_verify, OCTETSTRING& p_unsecured_payload, Params& p_params) {
loggers::get_instance().log(">>> security_services::process_ieee_dot2_content");
if (!p_ieee_1609_dot2_content.is_bound()) {
loggers::get_instance().warning("security_services::process_ieee_dot2_content: Unbound value");
return -1;
}
return -1;
} // End of method process_ieee_dot2_content
int security_services::secure_gn_payload(const OCTETSTRING& p_unsecured_gn_payload, const bool p_add_certificate, OCTETSTRING& p_secured_gn_payload, Params& p_params) {
loggers::get_instance().log_msg(">>> security_services::process_ieee_dot2_content: ", p_unsecured_gn_payload);
p_params.log();
// Set unsecured data
IEEE1609dot2::Ieee1609Dot2Content unsecured_data_content;
unsecured_data_content.unsecuredData() = p_unsecured_gn_payload;
IEEE1609dot2::Ieee1609Dot2Data unsecured_data(ProtocolVersion, unsecured_data_content);
// Set hash algorithm
IEEE1609dot2BaseTypes::HashAlgorithm hashId(IEEE1609dot2BaseTypes::HashAlgorithm::sha256);
if (p_params[Params::hash].compare("SHA-384") == 0) {
hashId = IEEE1609dot2BaseTypes::HashAlgorithm::sha384;
}
// Set SignedDataPayload
IEEE1609dot2::SignedDataPayload payload;
payload.data() = unsecured_data;
payload.extDataHash().set_to_omit();
IEEE1609dot2::HeaderInfo header_info;
header_info.psid() = converter::get_instance().string_to_int(p_params[Params::its_aid]);
unsigned long long ms = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count() - 1072911600000L; // TODO Add method such as its_tme() & its_time_mod() beacuse it is used also in LibItsCommon_externals
header_info.generationTime() = ms;
header_info.expiryTime().set_to_omit();
header_info.generationLocation().set_to_omit();
header_info.p2pcdLearningRequest().set_to_omit();
header_info.missingCrlIdentifier().set_to_omit();
header_info.encryptionKey().set_to_omit();
header_info.inlineP2pcdRequest().set_to_omit();
header_info.requestedCertificate().set_to_omit();
IEEE1609dot2::ToBeSignedData tbs_data;
tbs_data.payload() = payload;
tbs_data.headerInfo() = header_info;
loggers::get_instance().log_msg("security_services::process_ieee_dot2_content: tbs_data = ", tbs_data);
// Sign the ToBeSignedData data structure
IEEE1609dot2BaseTypes::Signature signature;
if (sign_tbs_data(tbs_data, hashId, signature, p_params) != 0) {
loggers::get_instance().warning("security_services::process_ieee_dot2_content: Failed to secure payload");
return -1;
}
IEEE1609dot2::SignerIdentifier signer;
if (!p_add_certificate) {
OCTETSTRING digest;
if (_security_db->get_hashed_id(p_params[Params::certificate], digest) != 0) {
loggers::get_instance().warning("security_services::process_ieee_dot2_content: Failed to secure payload");
return -1;
}
signer.digest() = digest;
} else { // FIXME Add certifcate case
OCTETSTRING cert;
if (_security_db->get_certificate(p_params[Params::certificate], cert) != 0) {
loggers::get_instance().warning("security_services::process_ieee_dot2_content: Failed to secure payload");
return -1;
}
// FIXME Need to decode certifcate, shall be done once is security_db
}
IEEE1609dot2::SignedData signed_data(
hashId,
tbs_data,
signer,
signature
);
loggers::get_instance().log_msg("security_services::process_ieee_dot2_content: signed_data = ", signed_data);
IEEE1609dot2::Ieee1609Dot2Content ieee_dot2_content;
ieee_dot2_content.signedData() = signed_data;
IEEE1609dot2::Ieee1609Dot2Data ieee_1609dot2_data(
security_services::ProtocolVersion,
ieee_dot2_content
);
loggers::get_instance().log_msg("security_services::process_ieee_dot2_content: ieee_1609dot2_data = ", ieee_1609dot2_data);
EtsiTs103097Codec_Data codec;
codec.encode(ieee_1609dot2_data, p_secured_gn_payload);
if (!p_secured_gn_payload.is_bound()) {
loggers::get_instance().warning("security_services::process_ieee_dot2_content: Failed to encode Ieee1609Dot2Data");
return -1;
}
return 0;
}
int security_services::sign_tbs_data(const IEEE1609dot2::ToBeSignedData& p_tbs_data, const IEEE1609dot2BaseTypes::HashAlgorithm& p_hashAlgorithm, IEEE1609dot2BaseTypes::Signature& p_signature, Params& p_params) {
loggers::get_instance().log_msg(">>> security_services::sign_tbs_data: ", p_tbs_data);
// Encode the ToBeSignedData
EtsiTs103097Codec_ToBeSignedData tbs_data_codec;
OCTETSTRING os;
tbs_data_codec.encode(p_tbs_data, os);
if (os.lengthof() == 0) {
loggers::get_instance().warning("security_services::sign_tbs_data: Failed to encode ToBeSignedData");
return -1;
}
loggers::get_instance().log_msg("security_services::sign_tbs_data: encoded tbs_data = ", os);
// Hash ToBeSignedData
OCTETSTRING hashed_data;
int result = -1;
if (p_hashAlgorithm == IEEE1609dot2BaseTypes::HashAlgorithm::sha256) {
result = hash_sha256(os, hashed_data);
} else {
result = hash_sha384(os, hashed_data);
}
loggers::get_instance().log_msg("security_services::sign_tbs_data: encoded hashed_data = ", hashed_data);
if (result != 0) {
loggers::get_instance().warning("security_services::sign_tbs_data: Failed to create hash");
return -1;
}
// Sign ToBeSignedData
result = -1;
loggers::get_instance().log("security_services::sign_tbs_data: encoded Params::signature = '%s'", p_params[Params::signature].c_str());
loggers::get_instance().log("security_services::sign_tbs_data: encoded Params::certificate = '%s'", p_params[Params::certificate].c_str());
if (p_params[Params::signature].compare("NISTP-256") == 0) {
result = sign_ecdsa_nistp256(hashed_data, p_signature, p_params);
} // FIXME To be continued
if (result != 0) {
loggers::get_instance().warning("security_services::sign_tbs_data: Failed to sign payload");
return -1;
}
return 0;
}
int security_services::hash_sha256(const OCTETSTRING& p_data, OCTETSTRING& p_hash_data) {
loggers::get_instance().log_msg(">>> security_services::hash_sha256: ", p_data);
sha256 hash;
std::vector<unsigned char> tbh(static_cast<const unsigned char *>(p_data), p_data.lengthof() + static_cast<const unsigned char *>(p_data));
std::vector<unsigned char> hashData;
hash.generate(tbh, hashData);
p_hash_data = OCTETSTRING(hashData.size(), hashData.data());
return 0;
}
int security_services::hash_sha384(const OCTETSTRING& p_data, OCTETSTRING& p_hash_data) {
loggers::get_instance().log_msg(">>> security_services::hash_sha384: ", p_data);
sha384 hash;
std::vector<unsigned char> tbh(static_cast<const unsigned char *>(p_data), p_data.lengthof() + static_cast<const unsigned char *>(p_data));
std::vector<unsigned char> hashData;
hash.generate(tbh, hashData);
p_hash_data = OCTETSTRING(hashData.size(), hashData.data());
return 0;
}
int security_services::sign_ecdsa_nistp256(const OCTETSTRING& p_hash, IEEE1609dot2BaseTypes::Signature& p_signature, Params& p_params) {
loggers::get_instance().log_msg(">>> security_services::sign_ecdsa_nistp256: ", p_hash);
OCTETSTRING pkey;
if (_security_db->get_private_key(p_params[Params::certificate], pkey) != 0) {
loggers::get_instance().warning("security_services::sign_ecdsa_nistp256: Failed to get private key");
return -1;
}
std::vector<unsigned char> private_key(static_cast<const unsigned char *>(pkey), static_cast<const unsigned char *>(pkey) + pkey.lengthof());
OCTETSTRING public_key_x;
OCTETSTRING public_key_y;
if (_security_db->get_public_keys(p_params[Params::certificate], public_key_x, public_key_y) != 0) {
loggers::get_instance().warning("security_services::sign_ecdsa_nistp256: Failed to get public keys");
return -1;
}
std::vector<unsigned char> hashed_data(static_cast<const unsigned char *>(p_hash), static_cast<const unsigned char *>(p_hash) + p_hash.lengthof());
ec_keys k(ec_elliptic_curves::nist_p_256, private_key);
std::vector<unsigned char> r_sig;
std::vector<unsigned char> s_sig;
if (k.sign(hashed_data, r_sig, s_sig) != 0) {
loggers::get_instance().warning("security_services::sign_ecdsa_nistp256: Failed to sign payload");
return -1;
}
IEEE1609dot2BaseTypes::EccP256CurvePoint ep;
ep.uncompressedP256() = IEEE1609dot2BaseTypes::EccP256CurvePoint_uncompressedP256(
public_key_x,
public_key_y
);
p_signature.ecdsaNistP256Signature() = IEEE1609dot2BaseTypes::EcdsaP256Signature(
ep,
OCTETSTRING(r_sig.size(), r_sig.data()) + OCTETSTRING(s_sig.size(), s_sig.data())
);
loggers::get_instance().log_msg("security_services::sign_ecdsa_nistp256: signature = ", p_signature);
return 0;
}