/usr/include/signal/sender_key.h is in libsignal-protocol-c-dev 2.3.1+git20171007-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | #ifndef SENDER_KEY
#define SENDER_KEY
#include <stdint.h>
#include <stddef.h>
#include "signal_protocol_types.h"
#ifdef __cplusplus
extern "C" {
#endif
int sender_message_key_create(sender_message_key **key,
uint32_t iteration, signal_buffer *seed,
signal_context *global_context);
uint32_t sender_message_key_get_iteration(sender_message_key *key);
signal_buffer *sender_message_key_get_iv(sender_message_key *key);
signal_buffer *sender_message_key_get_cipher_key(sender_message_key *key);
signal_buffer *sender_message_key_get_seed(sender_message_key *key);
void sender_message_key_destroy(signal_type_base *type);
int sender_chain_key_create(sender_chain_key **key,
uint32_t iteration, signal_buffer *chain_key,
signal_context *global_context);
uint32_t sender_chain_key_get_iteration(sender_chain_key *key);
int sender_chain_key_create_message_key(sender_chain_key *key, sender_message_key **message_key);
int sender_chain_key_create_next(sender_chain_key *key, sender_chain_key **next_key);
signal_buffer *sender_chain_key_get_seed(sender_chain_key *key);
void sender_chain_key_destroy(signal_type_base *type);
#ifdef __cplusplus
}
#endif
#endif /* SENDER_KEY */
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