/usr/include/signal/key_helper.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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #ifndef KEY_HELPER_H
#define KEY_HELPER_H
#include <stdint.h>
#include "signal_protocol_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Generate an identity key pair. Clients should only do this once,
* at install time.
*
* @param key_pair the generated identity key pair
* @return 0 on success, or negative on failure
*/
int signal_protocol_key_helper_generate_identity_key_pair(ratchet_identity_key_pair **key_pair, signal_context *global_context);
/**
* Generate a registration ID. Clients should only do this once,
* at install time.
*
* @param registration_id set to the generated registration ID
* @param extendedRange By default (0), the generated registration
* ID is sized to require the minimal possible protobuf
* encoding overhead. Specify true (1) if the caller needs
* the full range of MAX_INT at the cost of slightly
* higher encoding overhead.
* @return 0 on success, or negative on failure
*/
int signal_protocol_key_helper_generate_registration_id(uint32_t *registration_id, int extended_range, signal_context *global_context);
/**
* Generate a random number bounded by the provided maximum
*
* @param value set to the next random number
* @param max the maximum value of the random number
* @return 0 on success, or negative on failure
*/
int signal_protocol_key_helper_get_random_sequence(int *value, int max, signal_context *global_context);
/**
* Generate a list of PreKeys. Clients should do this at install time, and
* subsequently any time the list of PreKeys stored on the server runs low.
*
* Pre key IDs are shorts, so they will eventually be repeated. Clients should
* store pre keys in a circular buffer, so that they are repeated as infrequently
* as possible.
*
* When finished with this list, the caller should free it by calling
* signal_protocol_key_helper_key_list_free().
*
* @param head pointer to the head of the key list
* @param start the starting pre key ID, inclusive.
* @param count the number of pre keys to generate.
* @return 0 on success, or negative on failure
*/
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);
/**
* Get the pre key element for the current node in the key list.
*
* @param current list node
* @return pre key element
*/
session_pre_key *signal_protocol_key_helper_key_list_element(const signal_protocol_key_helper_pre_key_list_node *node);
/**
* Get the next element in the key list.
*
* @param current list node
* @return next list node, or 0 if at the end of the list
*/
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);
/**
* Free the key list.
*
* @param head pointer to the head of the list to free
*/
void signal_protocol_key_helper_key_list_free(signal_protocol_key_helper_pre_key_list_node *head);
/**
* Generate a signed pre key
*
* @param signed_pre_key set to the generated pre key
* @param identity_key_pair the local client's identity key pair.
* @param signed_pre_key_id the pre key ID to assign the generated signed pre key
* @param timestamp the current time in milliseconds since the UNIX epoch
*
* @return 0 on success, or negative on failure
*/
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 */
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