my_test_common.cpp

#include "my_test_common.hpp"

#include <stdlib.h>
#include <string.h>

#include <signal_protocol.h>
#include <curve.h>
#include <uthash.h>

/*
 * This is an implementation of Jenkin's "One-at-a-Time" hash.
 *
 * http://www.burtleburtle.net/bob/hash/doobs.html
 *
 * It is used to simplify using our new string recipient IDs
 * as part of our keys without having to significantly modify the
 * testing-only implementations of our data stores.
 */
int64_t jenkins_hash(const char *key, size_t len)
{
    uint64_t hash, i;
    for(hash = i = 0; i < len; ++i) {
        hash += key[i];
        hash += (hash << 10);
        hash ^= (hash >> 6);
    }
    hash += (hash << 3);
    hash ^= (hash >> 11);
    hash += (hash << 15);
    return hash;
}

void print_public_key(const char *prefix, ec_public_key *key)
{
    signal_buffer *buffer;
    ec_public_key_serialize(&buffer, key);

    fprintf(stderr, "%s ", prefix);
    uint8_t *data = signal_buffer_data(buffer);
    int len = signal_buffer_len(buffer);
    int i;
    for(i = 0; i < len; i++) {
        if(i > 0 && (i % 40) == 0) {
            fprintf(stderr, "\n");
        }
        fprintf(stderr, "%02X", data[i]);
    }
    fprintf(stderr, "\n");
    signal_buffer_free(buffer);
}

void print_buffer(const char *prefix, signal_buffer *buffer)
{
    fprintf(stderr, "%s ", prefix);
    uint8_t *data = signal_buffer_data(buffer);
    int len = signal_buffer_len(buffer);
    int i;
    for(i = 0; i < len; i++) {
        if(i > 0 && (i % 40) == 0) {
            fprintf(stderr, "\n");
        }
        fprintf(stderr, "%02X", data[i]);
    }
    fprintf(stderr, "\n");
}

void shuffle_buffers(signal_buffer **array, size_t n)
{
    if (n > 1) {
        size_t i;
        for (i = 0; i < n - 1; i++) {
            size_t j = i + rand() / (RAND_MAX / (n - i) + 1);
            signal_buffer *t = array[j];
            array[j] = array[i];
            array[i] = t;
        }
    }
}

void shuffle_ec_public_keys(ec_public_key **array, size_t n)
{
    if (n > 1) {
        size_t i;
        for (i = 0; i < n - 1; i++) {
            size_t j = i + rand() / (RAND_MAX / (n - i) + 1);
            ec_public_key *t = array[j];
            array[j] = array[i];
            array[i] = t;
        }
    }
}

ec_public_key *create_test_ec_public_key(signal_context *context)
{
    int result = 0;
    ec_key_pair *key_pair;
    result = curve_generate_key_pair(context, &key_pair);

    ec_public_key *public_key = ec_key_pair_get_public(key_pair);
    SIGNAL_REF(public_key);
    SIGNAL_UNREF(key_pair);
    return public_key;
}

ec_private_key *create_test_ec_private_key(signal_context *context)
{
    int result = 0;
    ec_key_pair *key_pair;
    result = curve_generate_key_pair(context, &key_pair);

    ec_private_key *private_key = ec_key_pair_get_private(key_pair);
    SIGNAL_REF(private_key);
    SIGNAL_UNREF(key_pair);
    return private_key;
}

void test_log(int level, const char *message, size_t len, void *user_data)
{
    switch(level) {
    case SG_LOG_ERROR:
        fprintf(stderr, "[ERROR] %s\n", message);
        break;
    case SG_LOG_WARNING:
        fprintf(stderr, "[WARNING] %s\n", message);
        break;
    case SG_LOG_NOTICE:
        fprintf(stderr, "[NOTICE] %s\n", message);
        break;
    case SG_LOG_INFO:
        fprintf(stderr, "[INFO] %s\n", message);
        break;
    case SG_LOG_DEBUG:
        fprintf(stderr, "[DEBUG] %s\n", message);
        break;
    default:
        fprintf(stderr, "[%d] %s\n", level, message);
        break;
    }
}

/*------------------------------------------------------------------------*/

void setup_test_store_context(signal_protocol_store_context **context, signal_context *global_context)
{
    int result = 0;

    signal_protocol_store_context *store_context = 0;
    result = signal_protocol_store_context_create(&store_context, global_context);

    setup_test_session_store(store_context);
    setup_test_pre_key_store(store_context);
    setup_test_signed_pre_key_store(store_context);
    setup_test_identity_key_store(store_context, global_context);
    setup_test_sender_key_store(store_context, global_context);

    *context = store_context;
}

/*------------------------------------------------------------------------*/

typedef struct {
    int64_t recipient_id;
    int32_t device_id;
} test_session_store_session_key;

typedef struct {
    test_session_store_session_key key;
    signal_buffer *record;
    UT_hash_handle hh;
} test_session_store_session;

typedef struct {
    test_session_store_session *sessions;
} test_session_store_data;

int test_session_store_load_session(signal_buffer **record, signal_buffer **user_record, const signal_protocol_address *address, void *user_data)
{
    test_session_store_data *data = (test_session_store_data *)user_data;

    test_session_store_session *s;

    test_session_store_session l;
    memset(&l, 0, sizeof(test_session_store_session));
    l.key.recipient_id = jenkins_hash(address->name, address->name_len);
    l.key.device_id = address->device_id;
    HASH_FIND(hh, data->sessions, &l.key, sizeof(test_session_store_session_key), s);

    if(!s) {
        return 0;
    }
    signal_buffer *result = signal_buffer_copy(s->record);
    if(!result) {
        return SG_ERR_NOMEM;
    }
    *record = result;
    return 1;
}

int test_session_store_get_sub_device_sessions(signal_int_list **sessions, const char *name, size_t name_len, void *user_data)
{
    test_session_store_data *data = (test_session_store_data *)user_data;

    signal_int_list *result = signal_int_list_alloc();
    if(!result) {
        return SG_ERR_NOMEM;
    }

    int64_t recipient_hash = jenkins_hash(name, name_len);
    test_session_store_session *cur_node;
    test_session_store_session *tmp_node;
    HASH_ITER(hh, data->sessions, cur_node, tmp_node) {
        if(cur_node->key.recipient_id == recipient_hash) {
            signal_int_list_push_back(result, cur_node->key.device_id);
        }
    }

    *sessions = result;
    return 0;
}

int test_session_store_store_session(const signal_protocol_address *address, uint8_t *record, size_t record_len, uint8_t *user_record_data, size_t user_record_len, void *user_data)
{
    test_session_store_data *data = (test_session_store_data *)user_data;

    test_session_store_session *s;

    test_session_store_session l;
    memset(&l, 0, sizeof(test_session_store_session));
    l.key.recipient_id = jenkins_hash(address->name, address->name_len);
    l.key.device_id = address->device_id;

    signal_buffer *record_buf = signal_buffer_create(record, record_len);
    if(!record_buf) {
        return SG_ERR_NOMEM;
    }

    HASH_FIND(hh, data->sessions, &l.key, sizeof(test_session_store_session_key), s);

    if(s) {
        signal_buffer_free(s->record);
        s->record = record_buf;
    }
    else {
        s = (test_session_store_session*)malloc(sizeof(test_session_store_session));
        if(!s) {
            signal_buffer_free(record_buf);
            return SG_ERR_NOMEM;
        }
        memset(s, 0, sizeof(test_session_store_session));
        s->key.recipient_id = jenkins_hash(address->name, address->name_len);
        s->key.device_id = address->device_id;
        s->record = record_buf;
        HASH_ADD(hh, data->sessions, key, sizeof(test_session_store_session_key), s);
    }

    return 0;
}

int test_session_store_contains_session(const signal_protocol_address *address, void *user_data)
{
    test_session_store_data *data = (test_session_store_data *)user_data;
    test_session_store_session *s;

    test_session_store_session l;
    memset(&l, 0, sizeof(test_session_store_session));
    l.key.recipient_id = jenkins_hash(address->name, address->name_len);
    l.key.device_id = address->device_id;

    HASH_FIND(hh, data->sessions, &l.key, sizeof(test_session_store_session_key), s);

    return (s == 0) ? 0 : 1;
}

int test_session_store_delete_session(const signal_protocol_address *address, void *user_data)
{
    int result = 0;
    test_session_store_data *data = (test_session_store_data *)user_data;
    test_session_store_session *s;

    test_session_store_session l;
    memset(&l, 0, sizeof(test_session_store_session));
    l.key.recipient_id = jenkins_hash(address->name, address->name_len);
    l.key.device_id = address->device_id;

    HASH_FIND(hh, data->sessions, &l.key, sizeof(test_session_store_session_key), s);

    if(s) {
        HASH_DEL(data->sessions, s);
        signal_buffer_free(s->record);
        free(s);
        result = 1;
    }
    return result;
}

int test_session_store_delete_all_sessions(const char *name, size_t name_len, void *user_data)
{
    int result = 0;
    test_session_store_data *data = (test_session_store_data *)user_data;

    int64_t recipient_hash = jenkins_hash(name, name_len);
    test_session_store_session *cur_node;
    test_session_store_session *tmp_node;
    HASH_ITER(hh, data->sessions, cur_node, tmp_node) {
        if(cur_node->key.recipient_id == recipient_hash) {
            HASH_DEL(data->sessions, cur_node);
            signal_buffer_free(cur_node->record);
            free(cur_node);
            result++;
        }
    }

    return result;
}

void test_session_store_destroy(void *user_data)
{
    test_session_store_data *data = (test_session_store_data *)user_data;

    test_session_store_session *cur_node;
    test_session_store_session *tmp_node;
    HASH_ITER(hh, data->sessions, cur_node, tmp_node) {
        HASH_DEL(data->sessions, cur_node);
        signal_buffer_free(cur_node->record);
        free(cur_node);
    }

    free(data);
}

void setup_test_session_store(signal_protocol_store_context *context)
{
    test_session_store_data *data = (test_session_store_data *)malloc(sizeof(test_session_store_data));
    memset(data, 0, sizeof(test_session_store_data));

    signal_protocol_session_store store = {
        .load_session_func = test_session_store_load_session,
        .get_sub_device_sessions_func = test_session_store_get_sub_device_sessions,
        .store_session_func = test_session_store_store_session,
        .contains_session_func = test_session_store_contains_session,
        .delete_session_func = test_session_store_delete_session,
        .delete_all_sessions_func = test_session_store_delete_all_sessions,
        .destroy_func = test_session_store_destroy,
        .user_data = data
    };

    signal_protocol_store_context_set_session_store(context, &store);
}

/*------------------------------------------------------------------------*/

typedef struct {
    uint32_t key_id;
    signal_buffer *key_record;
    UT_hash_handle hh;
} test_pre_key_store_key;

typedef struct {
    test_pre_key_store_key *keys;
} test_pre_key_store_data;

int test_pre_key_store_load_pre_key(signal_buffer **record, uint32_t pre_key_id, void *user_data)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *)user_data;

    test_pre_key_store_key *s;

    HASH_FIND(hh, data->keys, &pre_key_id, sizeof(uint32_t), s);
    if(s) {
        *record = signal_buffer_copy(s->key_record);
        return SG_SUCCESS;
    }
    else {
        return SG_ERR_INVALID_KEY_ID;
    }
}

int test_pre_key_store_store_pre_key(uint32_t pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *)user_data;

    test_pre_key_store_key *s;

    signal_buffer *key_buf = signal_buffer_create(record, record_len);
    if(!key_buf) {
        return SG_ERR_NOMEM;
    }

    HASH_FIND(hh, data->keys, &pre_key_id, sizeof(uint32_t), s);
    if(s) {
        signal_buffer_free(s->key_record);
        s->key_record = key_buf;
    }
    else {
        s = (test_pre_key_store_key*)malloc(sizeof(test_pre_key_store_key));
        if(!s) {
            signal_buffer_free(key_buf);
            return SG_ERR_NOMEM;
        }
        memset(s, 0, sizeof(test_pre_key_store_key));
        s->key_id = pre_key_id;
        s->key_record = key_buf;
        HASH_ADD(hh, data->keys, key_id, sizeof(uint32_t), s);
    }

    return 0;
}

int test_pre_key_store_contains_pre_key(uint32_t pre_key_id, void *user_data)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *)user_data;

    test_pre_key_store_key *s;
    HASH_FIND(hh, data->keys, &pre_key_id, sizeof(uint32_t), s);

    return (s == 0) ? 0 : 1;
}

int test_pre_key_store_remove_pre_key(uint32_t pre_key_id, void *user_data)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *)user_data;

    test_pre_key_store_key *s;
    HASH_FIND(hh, data->keys, &pre_key_id, sizeof(uint32_t), s);
    if(s) {
        HASH_DEL(data->keys, s);
        signal_buffer_free(s->key_record);
        free(s);
    }

    return 0;
}

void test_pre_key_store_destroy(void *user_data)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *)user_data;

    test_pre_key_store_key *cur_node;
    test_pre_key_store_key *tmp_node;
    HASH_ITER(hh, data->keys, cur_node, tmp_node) {
        HASH_DEL(data->keys, cur_node);
        signal_buffer_free(cur_node->key_record);
        free(cur_node);
    }
    free(data);
}

void setup_test_pre_key_store(signal_protocol_store_context *context)
{
    test_pre_key_store_data *data = (test_pre_key_store_data *) malloc(sizeof(test_pre_key_store_data));
    memset(data, 0, sizeof(test_pre_key_store_data));

    signal_protocol_pre_key_store store = {
        .load_pre_key = test_pre_key_store_load_pre_key,
        .store_pre_key = test_pre_key_store_store_pre_key,
        .contains_pre_key = test_pre_key_store_contains_pre_key,
        .remove_pre_key = test_pre_key_store_remove_pre_key,
        .destroy_func = test_pre_key_store_destroy,
        .user_data = data
    };

    signal_protocol_store_context_set_pre_key_store(context, &store);
}

/*------------------------------------------------------------------------*/

typedef struct {
    uint32_t key_id;
    signal_buffer *key_record;
    UT_hash_handle hh;
} test_signed_pre_key_store_key;

typedef struct {
    test_signed_pre_key_store_key *keys;
} test_signed_pre_key_store_data;


int test_signed_pre_key_store_load_signed_pre_key(signal_buffer **record, uint32_t signed_pre_key_id, void *user_data)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *)user_data;
    test_signed_pre_key_store_key *s;

    HASH_FIND(hh, data->keys, &signed_pre_key_id, sizeof(uint32_t), s);
    if(s) {
        *record = signal_buffer_copy(s->key_record);
        return SG_SUCCESS;
    }
    else {
        return SG_ERR_INVALID_KEY_ID;
    }
}

int test_signed_pre_key_store_store_signed_pre_key(uint32_t signed_pre_key_id, uint8_t *record, size_t record_len, void *user_data)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *)user_data;
    test_signed_pre_key_store_key *s;

    signal_buffer *key_buf = signal_buffer_create(record, record_len);
    if(!key_buf) {
        return SG_ERR_NOMEM;
    }

    HASH_FIND(hh, data->keys, &signed_pre_key_id, sizeof(uint32_t), s);
    if(s) {
        signal_buffer_free(s->key_record);
        s->key_record = key_buf;
    }
    else {
        s = (test_signed_pre_key_store_key*)malloc(sizeof(test_signed_pre_key_store_key));
        if(!s) {
            signal_buffer_free(key_buf);
            return SG_ERR_NOMEM;
        }
        memset(s, 0, sizeof(test_signed_pre_key_store_key));
        s->key_id = signed_pre_key_id;
        s->key_record = key_buf;
        HASH_ADD(hh, data->keys, key_id, sizeof(uint32_t), s);
    }

    return 0;
}

int test_signed_pre_key_store_contains_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *)user_data;

    test_signed_pre_key_store_key *s;
    HASH_FIND(hh, data->keys, &signed_pre_key_id, sizeof(uint32_t), s);

    return (s == 0) ? 0 : 1;
}

int test_signed_pre_key_store_remove_signed_pre_key(uint32_t signed_pre_key_id, void *user_data)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *)user_data;

    test_signed_pre_key_store_key *s;
    HASH_FIND(hh, data->keys, &signed_pre_key_id, sizeof(uint32_t), s);
    if(s) {
        HASH_DEL(data->keys, s);
        signal_buffer_free(s->key_record);
        free(s);
    }

    return 0;
}

void test_signed_pre_key_store_destroy(void *user_data)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *)user_data;

    test_signed_pre_key_store_key *cur_node;
    test_signed_pre_key_store_key *tmp_node;
    HASH_ITER(hh, data->keys, cur_node, tmp_node) {
        HASH_DEL(data->keys, cur_node);
        signal_buffer_free(cur_node->key_record);
        free(cur_node);
    }
    free(data);
}

void setup_test_signed_pre_key_store(signal_protocol_store_context *context)
{
    test_signed_pre_key_store_data *data = (test_signed_pre_key_store_data *) malloc(sizeof(test_signed_pre_key_store_data));
    memset(data, 0, sizeof(test_signed_pre_key_store_data));

    signal_protocol_signed_pre_key_store store = {
            .load_signed_pre_key = test_signed_pre_key_store_load_signed_pre_key,
            .store_signed_pre_key = test_signed_pre_key_store_store_signed_pre_key,
            .contains_signed_pre_key = test_signed_pre_key_store_contains_signed_pre_key,
            .remove_signed_pre_key = test_signed_pre_key_store_remove_signed_pre_key,
            .destroy_func = test_signed_pre_key_store_destroy,
            .user_data = data
    };

    signal_protocol_store_context_set_signed_pre_key_store(context, &store);
}

/*------------------------------------------------------------------------*/

typedef struct {
    int64_t recipient_id;
    signal_buffer *identity_key;
    UT_hash_handle hh;
} test_identity_store_key;

typedef struct {
    test_identity_store_key *keys;
    signal_buffer *identity_key_public;
    signal_buffer *identity_key_private;
    uint32_t local_registration_id;
} test_identity_store_data;

int test_identity_key_store_get_identity_key_pair(signal_buffer **public_data, signal_buffer **private_data, void *user_data)
{
    test_identity_store_data *data = (test_identity_store_data *) user_data;
    *public_data = signal_buffer_copy(data->identity_key_public);
    *private_data = signal_buffer_copy(data->identity_key_private);
    return 0;
}

int test_identity_key_store_get_local_registration_id(void *user_data, uint32_t *registration_id)
{
    test_identity_store_data *data = (test_identity_store_data *) user_data;
    *registration_id = data->local_registration_id;
    return 0;
}

int test_identity_key_store_save_identity(const signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
    test_identity_store_data *data = (test_identity_store_data *) user_data;

    test_identity_store_key *s;

    signal_buffer *key_buf = signal_buffer_create(key_data, key_len);
    if(!key_buf) {
        return SG_ERR_NOMEM;
    }

    int64_t recipient_hash = jenkins_hash(address->name, address->name_len);

    HASH_FIND(hh, data->keys, &recipient_hash, sizeof(int64_t), s);
    if(s) {
        signal_buffer_free(s->identity_key);
        s->identity_key = key_buf;
    }
    else {
        s = (test_identity_store_key*) malloc(sizeof(test_identity_store_key));
        if(!s) {
            signal_buffer_free(key_buf);
            return SG_ERR_NOMEM;
        }
        memset(s, 0, sizeof(test_identity_store_key));
        s->recipient_id = recipient_hash;
        s->identity_key = key_buf;
        HASH_ADD(hh, data->keys, recipient_id, sizeof(int64_t), s);
    }

    return 0;
}

int test_identity_key_store_is_trusted_identity(const signal_protocol_address *address, uint8_t *key_data, size_t key_len, void *user_data)
{
    test_identity_store_data *data = (test_identity_store_data *) user_data;

    int64_t recipient_hash = jenkins_hash(address->name, address->name_len);

    test_identity_store_key *s;
    HASH_FIND(hh, data->keys, &recipient_hash, sizeof(int64_t), s);

    if(s) {
        uint8_t *store_data = signal_buffer_data(s->identity_key);
        size_t store_len = signal_buffer_len(s->identity_key);
        if(store_len != key_len) {
            return 0;
        }
        if(memcmp(key_data, store_data, key_len) == 0) {
            return 1;
        }
        else {
            return 0;
        }
    }
    else {
        return 1;
    }
}

void test_identity_key_store_destroy(void *user_data)
{
    test_identity_store_data *data = (test_identity_store_data *) user_data;

    test_identity_store_key *cur_node;
    test_identity_store_key *tmp_node;
    HASH_ITER(hh, data->keys, cur_node, tmp_node) {
        HASH_DEL(data->keys, cur_node);
        signal_buffer_free(cur_node->identity_key);
        free(cur_node);
    }
    signal_buffer_free(data->identity_key_public);
    signal_buffer_free(data->identity_key_private);
    free(data);
}

void setup_test_identity_key_store(signal_protocol_store_context *context, signal_context *global_context)
{
    test_identity_store_data *data = (test_identity_store_data*) malloc(sizeof(test_identity_store_data));
    memset(data, 0, sizeof(test_identity_store_data));

    ec_key_pair *identity_key_pair_keys = 0;
    curve_generate_key_pair(global_context, &identity_key_pair_keys);

    ec_public_key *identity_key_public = ec_key_pair_get_public(identity_key_pair_keys);
    ec_private_key *identity_key_private = ec_key_pair_get_private(identity_key_pair_keys);

    ec_public_key_serialize(&data->identity_key_public, identity_key_public);
    ec_private_key_serialize(&data->identity_key_private, identity_key_private);
    SIGNAL_UNREF(identity_key_pair_keys);

    data->local_registration_id = (rand() % 16380) + 1;

    signal_protocol_identity_key_store store = {
            .get_identity_key_pair = test_identity_key_store_get_identity_key_pair,
            .get_local_registration_id = test_identity_key_store_get_local_registration_id,
            .save_identity = test_identity_key_store_save_identity,
            .is_trusted_identity = test_identity_key_store_is_trusted_identity,
            .destroy_func = test_identity_key_store_destroy,
            .user_data = data
    };

    signal_protocol_store_context_set_identity_key_store(context, &store);
}

/*------------------------------------------------------------------------*/

typedef struct {
    int64_t group_id;
    int64_t recipient_id;
    int32_t device_id;
} test_sender_key_store_key;

typedef struct {
    test_sender_key_store_key key;
    signal_buffer *record;
    UT_hash_handle hh;
} test_sender_key_store_record;

typedef struct {
    test_sender_key_store_record *records;
} test_sender_key_store_data;

int test_sender_key_store_store_sender_key(const signal_protocol_sender_key_name *sender_key_name, uint8_t *record, size_t record_len, uint8_t *user_record_data, size_t user_record_len, void *user_data)
{
    test_sender_key_store_data *data = (test_sender_key_store_data *) user_data;

    test_sender_key_store_record *s;

    test_sender_key_store_record l;
    memset(&l, 0, sizeof(test_sender_key_store_record));
    l.key.group_id = jenkins_hash(sender_key_name->group_id, sender_key_name->group_id_len);
    l.key.recipient_id = jenkins_hash(sender_key_name->sender.name, sender_key_name->sender.name_len);
    l.key.device_id = sender_key_name->sender.device_id;

    signal_buffer *record_buf = signal_buffer_create(record, record_len);
    if(!record_buf) {
        return SG_ERR_NOMEM;
    }

    HASH_FIND(hh, data->records, &l.key, sizeof(test_sender_key_store_key), s);

    if(s) {
        signal_buffer_free(s->record);
        s->record = record_buf;
    }
    else {
        s = (test_sender_key_store_record*)malloc(sizeof(test_sender_key_store_record));
        if(!s) {
            signal_buffer_free(record_buf);
            return SG_ERR_NOMEM;
        }
        memset(s, 0, sizeof(test_sender_key_store_record));
        s->key.group_id = jenkins_hash(sender_key_name->group_id, sender_key_name->group_id_len);
        s->key.recipient_id = jenkins_hash(sender_key_name->sender.name, sender_key_name->sender.name_len);
        s->key.device_id = sender_key_name->sender.device_id;
        s->record = record_buf;
        HASH_ADD(hh, data->records, key, sizeof(test_sender_key_store_key), s);
    }

    return 0;
}

int test_sender_key_store_load_sender_key(signal_buffer **record, signal_buffer **user_record, const signal_protocol_sender_key_name *sender_key_name, void *user_data)
{
    test_sender_key_store_data *data = (test_sender_key_store_data *) user_data;

    test_sender_key_store_record *s;

    test_sender_key_store_record l;
    memset(&l, 0, sizeof(test_sender_key_store_record));
    l.key.group_id = jenkins_hash(sender_key_name->group_id, sender_key_name->group_id_len);
    l.key.recipient_id = jenkins_hash(sender_key_name->sender.name, sender_key_name->sender.name_len);
    l.key.device_id = sender_key_name->sender.device_id;
    HASH_FIND(hh, data->records, &l.key, sizeof(test_sender_key_store_key), s);

    if(!s) {
        return 0;
    }
    signal_buffer *result = signal_buffer_copy(s->record);
    if(!result) {
        return SG_ERR_NOMEM;
    }
    *record = result;
    return 1;
}

void test_sender_key_store_destroy(void *user_data)
{
    test_sender_key_store_data *data = (test_sender_key_store_data *) user_data;

    test_sender_key_store_record *cur_node;
    test_sender_key_store_record *tmp_node;
    HASH_ITER(hh, data->records, cur_node, tmp_node) {
        HASH_DEL(data->records, cur_node);
        signal_buffer_free(cur_node->record);
        free(cur_node);
    }
    free(data);
}

void setup_test_sender_key_store(signal_protocol_store_context *context, signal_context *global_context)
{
    test_sender_key_store_data *data = (test_sender_key_store_data*) malloc(sizeof(test_sender_key_store_data));
    memset(data, 0, sizeof(test_sender_key_store_data));

    signal_protocol_sender_key_store store = {
        .store_sender_key = test_sender_key_store_store_sender_key,
        .load_sender_key = test_sender_key_store_load_sender_key,
        .destroy_func = test_sender_key_store_destroy,
        .user_data = data
    };

    signal_protocol_store_context_set_sender_key_store(context, &store);
}

#ifndef __OpenBSD__
void srand_deterministic(unsigned int seed)
{
    srand(seed);
}
#endif