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.
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
#pragma once
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#include "keys.hpp"
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#include "sha.hpp"
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#include <vanetza/common/byte_buffer.hpp>
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#include <boost/optional/optional.hpp>
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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 SecurityModule
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{
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public:
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class EciesContext
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{
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public:
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virtual ~EciesContext() = default;
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virtual PublicKey ephemeral_public_key() const = 0;
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virtual PublicKey recipient_public_key() const = 0;
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virtual ByteBuffer shared_secret() const = 0;
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virtual ByteBuffer encrypted_key() const = 0;
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virtual ByteBuffer authentication_tag() const = 0;
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virtual ByteBuffer nonce() const = 0;
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virtual void nonce(const ByteBuffer&) = 0;
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virtual ByteBuffer encrypt(const ByteBuffer& plaintext) = 0;
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virtual ByteBuffer decrypt(const std::uint8_t* buffer, std::size_t length) = 0;
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};
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virtual ~SecurityModule() = default;
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virtual Sha256Hash calculate_sha256_hash(const std::uint8_t* buffer, std::size_t length) = 0;
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virtual Sha384Hash calculate_sha384_hash(const std::uint8_t* buffer, std::size_t length) = 0;
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virtual bool verify(const Sha256Hash&, const Signature&, const PublicKey&) = 0;
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virtual bool verify(const Sha384Hash&, const Signature&, const PublicKey&) = 0;
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virtual boost::optional<Signature> sign(const ByteBuffer& digest, const PublicKey&) = 0;
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// True if the private key matching `key` is available for signing.
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virtual bool can_sign(const PublicKey& key);
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virtual PublicKey create_key(KeyType) = 0;
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virtual bool discard_key(const PublicKey&) = 0;
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virtual ByteBuffer generate_nonce(std::size_t length) = 0;
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virtual std::unique_ptr<EciesContext> create_ecies_context(const PublicKey& receiver, const Sha256Hash& info) = 0;
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virtual ByteBuffer calculate_hmac_sha256(const ByteBuffer& key, const ByteBuffer& data) = 0;
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};
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class ScopedKeyPair
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{
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public:
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ScopedKeyPair(SecurityModule& sm, KeyType type) : m_security(&sm), m_public_key(sm.create_key(type))
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{
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}
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// no copy
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ScopedKeyPair(const ScopedKeyPair&) = delete;
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ScopedKeyPair& operator=(const ScopedKeyPair&) = delete;
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// no move
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ScopedKeyPair(ScopedKeyPair&&) = delete;
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ScopedKeyPair& operator=(ScopedKeyPair&&) = delete;
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~ScopedKeyPair()
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{
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if (m_security) {
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m_security->discard_key(m_public_key);
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}
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}
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const PublicKey& public_key() const
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{
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return m_public_key;
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}
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void commit()
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{
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// will no longer discard created key
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m_security = nullptr;
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}
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private:
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SecurityModule* m_security = nullptr;
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PublicKey m_public_key;
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};
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} // namespace pki
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} // namespace vanetza
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