Ashin Walpola
0e9525162d
obu-firmware builds against vanetza-idf from microbu-esp32c5/external, but that tree was gitignored, so a clone of this repository could not build the firmware it ships. It is now committed here as ordinary files in its own folder, microbu-esp32c5/: the colleague's commit cf4b99f plus the V2X2MAP bridge's signature verification (--trust) used on the bench. Nothing is fetched from or pushed to the colleague's repository; this repository and its remotes carry everything. The folder's own .gitignore keeps build output, downloaded components and private key material out, as it did there; the committed file set is identical to that repository's tracked files. The ESP32-C5 is still flashed from obu-firmware/, which only takes vanetza-idf from microbu-esp32c5/, so the two stay separate folders. FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
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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