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Diffstat (limited to 'libs/libaxolotl/src/protocol.h')
| -rw-r--r-- | libs/libaxolotl/src/protocol.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/libs/libaxolotl/src/protocol.h b/libs/libaxolotl/src/protocol.h new file mode 100644 index 0000000000..e149ae84a1 --- /dev/null +++ b/libs/libaxolotl/src/protocol.h @@ -0,0 +1,151 @@ +#ifndef PROTOCOL_H +#define PROTOCOL_H + +#include <stdint.h> +#include <stddef.h> +#include "axolotl_types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define KEY_EXCHANGE_INITIATE_FLAG 0x01 +#define KEY_EXCHANGE_RESPONSE_FLAG 0X02 +#define KEY_EXCHANGE_SIMULTAENOUS_INITIATE_FLAG 0x04 + +#define CIPHERTEXT_UNSUPPORTED_VERSION 1 +#define CIPHERTEXT_CURRENT_VERSION 3 + +#define CIPHERTEXT_WHISPER_TYPE 2 +#define CIPHERTEXT_PREKEY_TYPE 3 +#define CIPHERTEXT_SENDERKEY_TYPE 4 +#define CIPHERTEXT_SENDERKEY_DISTRIBUTION_TYPE 5 + +/* Worst case overhead. Not always accurate, but good enough for padding. */ +#define CIPHERTEXT_ENCRYPTED_MESSAGE_OVERHEAD 53 + +int key_exchange_message_create(key_exchange_message **message, + uint8_t message_version, uint32_t sequence, uint32_t flags, + ec_public_key *base_key, uint8_t *base_key_signature, + ec_public_key *ratchet_key, ec_public_key *identity_key); + +int key_exchange_message_deserialize(key_exchange_message **message, const uint8_t *data, size_t len, axolotl_context *global_context); + +axolotl_buffer *key_exchange_message_get_serialized(const key_exchange_message *message); + +uint8_t key_exchange_message_get_version(const key_exchange_message *message); +ec_public_key *key_exchange_message_get_base_key(const key_exchange_message *message); +uint8_t *key_exchange_message_get_base_key_signature(key_exchange_message *message); +ec_public_key *key_exchange_message_get_ratchet_key(const key_exchange_message *message); +ec_public_key *key_exchange_message_get_identity_key(const key_exchange_message *message); +int key_exchange_message_has_identity_key(const key_exchange_message *message); +uint8_t key_exchange_message_get_max_version(const key_exchange_message *message); +int key_exchange_message_is_response(const key_exchange_message *message); +int key_exchange_message_is_initiate(const key_exchange_message *message); +int key_exchange_message_is_response_for_simultaneous_initiate(const key_exchange_message *message); +uint32_t key_exchange_message_get_flags(const key_exchange_message *message); +uint32_t key_exchange_message_get_sequence(const key_exchange_message *message); + +void key_exchange_message_destroy(axolotl_type_base *type); + +int ciphertext_message_get_type(const ciphertext_message *message); +axolotl_buffer *ciphertext_message_get_serialized(const ciphertext_message *message); + +int whisper_message_create(whisper_message **message, uint8_t message_version, + const uint8_t *mac_key, size_t mac_key_len, + ec_public_key *sender_ratchet_key, uint32_t counter, uint32_t previous_counter, + const uint8_t *ciphertext, size_t ciphertext_len, + ec_public_key *sender_identity_key, ec_public_key *receiver_identity_key, + axolotl_context *global_context); + +int whisper_message_deserialize(whisper_message **message, const uint8_t *data, size_t len, + axolotl_context *global_context); + +int whisper_message_copy(whisper_message **message, whisper_message *other_message, axolotl_context *global_context); + +ec_public_key *whisper_message_get_sender_ratchet_key(const whisper_message *message); + +uint8_t whisper_message_get_message_version(const whisper_message *message); + +uint32_t whisper_message_get_counter(const whisper_message *message); + +axolotl_buffer *whisper_message_get_body(const whisper_message *message); + +/** + * Verify the MAC on the Whisper message. + * + * @return 1 if verified, 0 if invalid, negative on error + */ +int whisper_message_verify_mac(whisper_message *message, + uint8_t message_version, + ec_public_key *sender_identity_key, + ec_public_key *receiver_identity_key, + const uint8_t *mac_key, size_t mac_key_len, + axolotl_context *global_context); + +int whisper_message_is_legacy(const uint8_t *data, size_t len); + +void whisper_message_destroy(axolotl_type_base *type); + +int pre_key_whisper_message_create(pre_key_whisper_message **pre_key_message, + uint8_t message_version, uint32_t registration_id, const uint32_t *pre_key_id, + uint32_t signed_pre_key_id, ec_public_key *base_key, ec_public_key *identity_key, + whisper_message *message, + axolotl_context *global_context); + +int pre_key_whisper_message_deserialize(pre_key_whisper_message **message, + const uint8_t *data, size_t len, + axolotl_context *global_context); + +int pre_key_whisper_message_copy(pre_key_whisper_message **message, pre_key_whisper_message *other_message, axolotl_context *global_context); + +uint8_t pre_key_whisper_message_get_message_version(const pre_key_whisper_message *message); +ec_public_key *pre_key_whisper_message_get_identity_key(const pre_key_whisper_message *message); +uint32_t pre_key_whisper_message_get_registration_id(const pre_key_whisper_message *message); +int pre_key_whisper_message_has_pre_key_id(const pre_key_whisper_message *message); +uint32_t pre_key_whisper_message_get_pre_key_id(const pre_key_whisper_message *message); +uint32_t pre_key_whisper_message_get_signed_pre_key_id(const pre_key_whisper_message *message); +ec_public_key *pre_key_whisper_message_get_base_key(const pre_key_whisper_message *message); +whisper_message *pre_key_whisper_message_get_whisper_message(const pre_key_whisper_message *message); + +void pre_key_whisper_message_destroy(axolotl_type_base *type); + +int sender_key_message_create(sender_key_message **message, + uint32_t key_id, uint32_t iteration, + const uint8_t *ciphertext, size_t ciphertext_len, + ec_private_key *signature_key, + axolotl_context *global_context); +int sender_key_message_deserialize(sender_key_message **message, + const uint8_t *data, size_t len, + axolotl_context *global_context); +int sender_key_message_copy(sender_key_message **message, sender_key_message *other_message, axolotl_context *global_context); + +uint32_t sender_key_message_get_key_id(sender_key_message *message); +uint32_t sender_key_message_get_iteration(sender_key_message *message); +axolotl_buffer *sender_key_message_get_ciphertext(sender_key_message *message); +int sender_key_message_verify_signature(sender_key_message *message, ec_public_key *signature_key); + +void sender_key_message_destroy(axolotl_type_base *type); + +int sender_key_distribution_message_create(sender_key_distribution_message **message, + uint32_t id, uint32_t iteration, + const uint8_t *chain_key, size_t chain_key_len, + ec_public_key *signature_key, + axolotl_context *global_context); +int sender_key_distribution_message_deserialize(sender_key_distribution_message **message, + const uint8_t *data, size_t len, + axolotl_context *global_context); +int sender_key_distribution_message_copy(sender_key_distribution_message **message, sender_key_distribution_message *other_message, axolotl_context *global_context); + +uint32_t sender_key_distribution_message_get_id(sender_key_distribution_message *message); +uint32_t sender_key_distribution_message_get_iteration(sender_key_distribution_message *message); +axolotl_buffer *sender_key_distribution_message_get_chain_key(sender_key_distribution_message *message); +ec_public_key *sender_key_distribution_message_get_signature_key(sender_key_distribution_message *message); + +void sender_key_distribution_message_destroy(axolotl_type_base *type); + +#ifdef __cplusplus +} +#endif + +#endif /* PROTOCOL_H */ |