From aec8f049d43d79c6c8c26a7d9ddfd9460d267275 Mon Sep 17 00:00:00 2001 From: George Hazan Date: Tue, 26 Mar 2019 13:06:41 +0300 Subject: libaxolotl doesn't exist anymore, it's renamed to libsignal --- libs/libsignal/src/protocol.h | 126 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 libs/libsignal/src/protocol.h (limited to 'libs/libsignal/src/protocol.h') diff --git a/libs/libsignal/src/protocol.h b/libs/libsignal/src/protocol.h new file mode 100644 index 0000000000..73c2df9d86 --- /dev/null +++ b/libs/libsignal/src/protocol.h @@ -0,0 +1,126 @@ +#ifndef PROTOCOL_H +#define PROTOCOL_H + +#include +#include +#include "signal_protocol_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_SIGNAL_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 ciphertext_message_get_type(const ciphertext_message *message); +signal_buffer *ciphertext_message_get_serialized(const ciphertext_message *message); + +int signal_message_create(signal_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, + signal_context *global_context); + +int signal_message_deserialize(signal_message **message, const uint8_t *data, size_t len, + signal_context *global_context); + +int signal_message_copy(signal_message **message, signal_message *other_message, signal_context *global_context); + +ec_public_key *signal_message_get_sender_ratchet_key(const signal_message *message); + +uint8_t signal_message_get_message_version(const signal_message *message); + +uint32_t signal_message_get_counter(const signal_message *message); + +signal_buffer *signal_message_get_body(const signal_message *message); + +/** + * Verify the MAC on the Signal message. + * + * @return 1 if verified, 0 if invalid, negative on error + */ +int signal_message_verify_mac(signal_message *message, + ec_public_key *sender_identity_key, + ec_public_key *receiver_identity_key, + const uint8_t *mac_key, size_t mac_key_len, + signal_context *global_context); + +int signal_message_is_legacy(const uint8_t *data, size_t len); + +void signal_message_destroy(signal_type_base *type); + +int pre_key_signal_message_create(pre_key_signal_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, + signal_message *message, + signal_context *global_context); + +int pre_key_signal_message_deserialize(pre_key_signal_message **message, + const uint8_t *data, size_t len, + signal_context *global_context); + +int pre_key_signal_message_copy(pre_key_signal_message **message, pre_key_signal_message *other_message, signal_context *global_context); + +uint8_t pre_key_signal_message_get_message_version(const pre_key_signal_message *message); +ec_public_key *pre_key_signal_message_get_identity_key(const pre_key_signal_message *message); +uint32_t pre_key_signal_message_get_registration_id(const pre_key_signal_message *message); +int pre_key_signal_message_has_pre_key_id(const pre_key_signal_message *message); +uint32_t pre_key_signal_message_get_pre_key_id(const pre_key_signal_message *message); +uint32_t pre_key_signal_message_get_signed_pre_key_id(const pre_key_signal_message *message); +ec_public_key *pre_key_signal_message_get_base_key(const pre_key_signal_message *message); +signal_message *pre_key_signal_message_get_signal_message(const pre_key_signal_message *message); + +void pre_key_signal_message_destroy(signal_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, + signal_context *global_context); +int sender_key_message_deserialize(sender_key_message **message, + const uint8_t *data, size_t len, + signal_context *global_context); +int sender_key_message_copy(sender_key_message **message, sender_key_message *other_message, signal_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); +signal_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(signal_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, + signal_context *global_context); +int sender_key_distribution_message_deserialize(sender_key_distribution_message **message, + const uint8_t *data, size_t len, + signal_context *global_context); +int sender_key_distribution_message_copy(sender_key_distribution_message **message, sender_key_distribution_message *other_message, signal_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); +signal_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(signal_type_base *type); + +#ifdef __cplusplus +} +#endif + +#endif /* PROTOCOL_H */ -- cgit v1.2.3