secured_message.hpp

#ifndef SECURED_MESSAGE_HPP_DCBC74AC
#define SECURED_MESSAGE_HPP_DCBC74AC
 
#include <vanetza/asn1/asn1c_wrapper.hpp>
#include <vanetza/asn1/security_profile.hpp>
#include VANETZA_ASN1_SECURITY_HEADER(EtsiTs103097Data.h)
#include <vanetza/common/archives.hpp>
#include <vanetza/common/its_aid.hpp>
#include <vanetza/net/packet_variant.hpp>
#include <vanetza/security/hash_algorithm.hpp>
#include <vanetza/security/hashed_id.hpp>
#include <vanetza/security/public_key.hpp>
#include <vanetza/security/signature.hpp>
#include <vanetza/security/v3/asn1_types.hpp>
#include <vanetza/security/v3/certificate.hpp>
 
#include <boost/optional/optional_fwd.hpp>
#include <boost/variant/variant_fwd.hpp>
#include <array>
#include <cstdint>
#include <list>
 
namespace vanetza
{
namespace security
{
namespace v3
{
 
struct SecuredMessage : public asn1::asn1c_oer_wrapper<asn1::EtsiTs103097Data>
{
    using Time64 = std::uint64_t;
    using SignerIdentifier = boost::variant<const asn1::HashedId8*, const asn1::Certificate*>;
 
    SecuredMessage();
    static SecuredMessage with_signed_data();
    static SecuredMessage with_signed_data_hash();
    static SecuredMessage with_encrypted_data();
 
    uint8_t protocol_version() const;
    ItsAid its_aid() const;
    PacketVariant payload() const;
    boost::optional<HashedId8> certificate_id() const;
    bool is_signed() const;
    bool is_encrypted() const;
    boost::optional<Time64> generation_time() const;
    boost::optional<Signature> signature() const;
    SignerIdentifier signer_identifier() const;
    ByteBuffer signing_payload() const;
    HashAlgorithm hash_id() const;
 
    void set_its_aid(ItsAid its_aid);
    void set_generation_time(Time64 time);
    void set_generation_location(const asn1::ThreeDLocation& location);
    void set_payload(const ByteBuffer& payload);
    void set_external_payload_hash(const Sha256Digest& hash);
    void set_hash_id(HashAlgorithm);
    void set_signature(const Signature& signature);
    std::list<HashedId3> get_inline_p2pcd_request() const;
    void set_inline_p2pcd_request(std::list<HashedId3> requests);
    void add_inline_p2pcd_request(HashedId3 unkown_certificate_digest);
    void set_signature(const SomeEcdsaSignature& signature);
    void set_dummy_signature();
    void set_signer_identifier_self();
    void set_signer_identifier(const HashedId8&);
    void set_signer_identifier(const Certificate&);
    void set_requested_certificate(const Certificate&);
 
    void get_aes_ccm_ciphertext(ByteBuffer& ccm_ciphertext, std::array<uint8_t, 12>& nonce) const;
    void set_aes_ccm_ciphertext(const ByteBuffer& ccm_ciphertext, const std::array<uint8_t, 12>& nonce);
    void set_cert_recip_info(const HashedId8& recipient_id,
                             const std::array<uint8_t, 16>& ecies_ciphertext,
                             const std::array<uint8_t, 16>& ecies_tag,
                             const PublicKey& ecies_pub_key);
    bool check_psk_match(const std::array<uint8_t, 16>& psk) const;
};
 
/**
 * \brief Calculate size of encoded secured message
 * \param msg secured message
 * \return number of octets needed to serialize this message
 */
size_t get_size(const SecuredMessage& msg);
 
/**
 * \brief Serialize a secured message
 *
 * @param ar output archive
 * @param msg message to be serialized
 */
void serialize(OutputArchive& ar, const SecuredMessage& msg);
 
/**
 * \brief Deserialize a secured message
 *
 * \param ar input archive
 * \param msg destination message object
 * \return size of deserialized message
 */
size_t deserialize(InputArchive& ar, SecuredMessage& msg);
 
ByteBuffer get_payload(const asn1::Opaque*);
ByteBuffer get_payload(const asn1::SignedData*);
void set_payload(asn1::Opaque* unsecured, const ByteBuffer& buffer);
ByteBuffer convert_to_payload(vanetza::ChunkPacket packet);
 
boost::optional<HashedId8> get_certificate_id(const SecuredMessage::SignerIdentifier&);
 
/**
 * Check if signer identifier contains a full certificate
 * \param signer_identifier to check
 * \param true if signer identifier contains a full certificate
 */
bool contains_certificate(const SecuredMessage::SignerIdentifier& signer_identifier);
 
/**
 * Fetch certificate from identifier if full certificate is included.
 * \return certificate or nullptr
 */
const asn1::Certificate* get_certificate(const SecuredMessage::SignerIdentifier&);
 
} // namespace v3
} // namespace security
} // namespace vanetza
 
#endif /* SECURED_MESSAGE_HPP_DCBC74AC */