Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
#include "signed_builder.hpp"
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#include "asn1.hpp"
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#include "certificate.hpp"
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#include "hashed_id8.hpp"
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#include "mock_credential_storage.hpp"
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#include "openssl_security_module.hpp"
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#include "stub_certificate.hpp"
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#include "validation.hpp"
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#include <vanetza/asn1/security/SignedData.h>
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#include <vanetza/common/byte_buffer.hpp>
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#include <gtest/gtest.h>
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#include <cstring>
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#include <memory>
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namespace vanetza
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{
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namespace pki
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{
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class SignedBuilderTest : public ::testing::Test
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{
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protected:
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SignedBuilderTest() : m_credentials(std::make_shared<MockCredentialStorage>()), m_security(m_credentials)
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{
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}
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std::shared_ptr<MockCredentialStorage> m_credentials;
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OpenSslSecurityModule m_security;
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};
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// create_external_signed produces an EtsiTs103097Data-SignedExternalPayload
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// envelope whose SignedData:
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// - tbsData.payload.extDataHash is set (not data)
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// - extDataHash carries SHA-256(external_payload) when hash_algo is SHA256
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// - signer = digest(cert) when a cert is provided
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// - signature verifies against the cert's verification key
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TEST_F(SignedBuilderTest, external_signed_carries_payload_hash_and_verifies)
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{
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PublicKey ec_key = m_security.create_key(KeyType::NistP256);
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Certificate ec_cert = build_stub_certificate(ec_key);
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ByteBuffer payload { 0xDE, 0xAD, 0xBE, 0xEF, 0xCA, 0xFE };
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SignedData envelope = create_external_signed(payload, m_security, ec_key, HashAlgorithm::SHA256, &ec_cert);
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ASSERT_EQ(Vanetza_Security_Ieee1609Dot2Content_PR_signedData, envelope->content->present);
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Vanetza_Security_SignedData_t* sd = envelope->content->choice.signedData;
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ASSERT_NE(nullptr, sd);
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// payload.extDataHash present, payload.data absent
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ASSERT_NE(nullptr, sd->tbsData);
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ASSERT_NE(nullptr, sd->tbsData->payload);
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ASSERT_NE(nullptr, sd->tbsData->payload->extDataHash);
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EXPECT_EQ(nullptr, sd->tbsData->payload->data);
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ASSERT_EQ(Vanetza_Security_HashedData_PR_sha256HashedData, sd->tbsData->payload->extDataHash->present);
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// hash equals SHA-256(payload)
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Sha256Hash expected = m_security.calculate_sha256_hash(payload.data(), payload.size());
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const auto& hash_oct = sd->tbsData->payload->extDataHash->choice.sha256HashedData;
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ASSERT_EQ(32, hash_oct.size);
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EXPECT_EQ(0, std::memcmp(hash_oct.buf, expected.octets.data(), 32));
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// signer = digest, matches HashedId8(ec_cert)
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ASSERT_EQ(Vanetza_Security_SignerIdentifier_PR_digest, sd->signer.present);
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HashedId8 ec_hid8 = ec_cert.calculate_hashed_id8(m_security);
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EXPECT_TRUE(sd->signer.choice.digest == ec_hid8.octets);
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// signature verifies against ec_cert's verification key
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Sha256Hash digest = calculate_digest<Sha256Hash>(m_security, *sd->tbsData, &ec_cert.raw());
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EXPECT_TRUE(m_security.verify(digest, make_signature(sd->signature), ec_key));
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}
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} // namespace pki
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} // namespace vanetza
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