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 FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
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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