key_helper.h

#ifndef KEY_HELPER_H
#define KEY_HELPER_H

#include <stdint.h>
#include "signal_protocol_types.h"

#ifdef __cplusplus
extern "C" {
#endif

int signal_protocol_key_helper_generate_identity_key_pair(ratchet_identity_key_pair **key_pair, signal_context *global_context);

int signal_protocol_key_helper_generate_registration_id(uint32_t *registration_id, int extended_range, signal_context *global_context);

int signal_protocol_key_helper_get_random_sequence(int *value, int max, signal_context *global_context);

int signal_protocol_key_helper_generate_pre_keys(signal_protocol_key_helper_pre_key_list_node **head,
        unsigned int start, unsigned int count,
        signal_context *global_context);

session_pre_key *signal_protocol_key_helper_key_list_element(const signal_protocol_key_helper_pre_key_list_node *node);

signal_protocol_key_helper_pre_key_list_node *signal_protocol_key_helper_key_list_next(const signal_protocol_key_helper_pre_key_list_node *node);

void signal_protocol_key_helper_key_list_free(signal_protocol_key_helper_pre_key_list_node *head);

int signal_protocol_key_helper_generate_signed_pre_key(session_signed_pre_key **signed_pre_key,
        const ratchet_identity_key_pair *identity_key_pair,
        uint32_t signed_pre_key_id,
        uint64_t timestamp,
        signal_context *global_context);

/*
 * Generate a sender signing key pair
 *
* @param key_pair the generated key pair
* @return 0 on success, or negative on failure
 */
int signal_protocol_key_helper_generate_sender_signing_key(ec_key_pair **key_pair, signal_context *global_context);

/*
 * Generate a sender key
 *
 * @param key_buffer buffer to be allocated and populated with the result
 * @return 0 on success, or negative on failure
 */
int signal_protocol_key_helper_generate_sender_key(signal_buffer **key_buffer, signal_context *global_context);

/*
 * Generate a sender key ID
 *
 * @param key_id assigned to the generated ID
 * @return 0 on success, or negative on failure
 */
int signal_protocol_key_helper_generate_sender_key_id(uint32_t *key_id, signal_context *global_context);

#ifdef __cplusplus
}
#endif

#endif /* KEY_HELPER_H */