/*
* Remove a user from the user store.
*
* The user is identified by it's public signing key.
*/
return_status user_store_remove_by_key(user_store * const store, const buffer_t * const public_signing_key) {
return_status status = return_status_init();
user_store_node *node = NULL;
status = user_store_find_node(&node, store, public_signing_key);
throw_on_error(NOT_FOUND, "Failed to find user to remove.");
user_store_remove(store, node);
cleanup:
return status;
}
int main(void) {
sodium_init();
//create a user_store
user_store *store = user_store_create();
//check the content
buffer_t *list = user_store_list(store);
if (list->content_length != 0) {
fprintf(stderr, "ERROR: List of users is not empty.\n");
user_store_destroy(store);
buffer_destroy_from_heap(list);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
int status;
//create three users with prekeys and identity keys
//first alice
//alice identity key
buffer_t *alice_private_identity = buffer_create(crypto_box_SECRETKEYBYTES, crypto_box_SECRETKEYBYTES);
buffer_t *alice_public_identity = buffer_create(crypto_box_PUBLICKEYBYTES, crypto_box_PUBLICKEYBYTES);
status = generate_and_print_keypair(
alice_public_identity,
alice_private_identity,
buffer_create_from_string("Alice"),
buffer_create_from_string("identity"));
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Alice's identity keypair.\n");
buffer_clear(alice_private_identity);
return status;
}
//alice prekeys
buffer_t *alice_private_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES, PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES);
buffer_t *alice_public_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES, PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES);
status = generate_prekeys(alice_private_prekeys, alice_public_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Alice's prekeys.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
return status;
}
//then bob
//bob's identity key
buffer_t *bob_private_identity = buffer_create(crypto_box_SECRETKEYBYTES, crypto_box_SECRETKEYBYTES);
buffer_t *bob_public_identity = buffer_create(crypto_box_PUBLICKEYBYTES, crypto_box_PUBLICKEYBYTES);
status = generate_and_print_keypair(
bob_public_identity,
bob_private_identity,
buffer_create_from_string("Bob"),
buffer_create_from_string("identity"));
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Bob's identity keypair.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
return status;
}
//bob's prekeys
buffer_t *bob_private_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES, PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES);
buffer_t *bob_public_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES, PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES);
status = generate_prekeys(bob_private_prekeys, bob_public_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Bob's prekeys.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
return status;
}
//then charlie
//charlie's identity key
buffer_t *charlie_private_identity = buffer_create(crypto_box_SECRETKEYBYTES, crypto_box_SECRETKEYBYTES);
buffer_t *charlie_public_identity = buffer_create(crypto_box_PUBLICKEYBYTES, crypto_box_PUBLICKEYBYTES);
status = generate_and_print_keypair(
charlie_public_identity,
charlie_private_identity,
buffer_create_from_string("Charlie"),
buffer_create_from_string("identity"));
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Charlie's identity keypair.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
return status;
}
//charlie's prekeys
buffer_t *charlie_private_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES, PREKEY_AMOUNT * crypto_box_SECRETKEYBYTES);
buffer_t *charlie_public_prekeys = buffer_create(PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES, PREKEY_AMOUNT * crypto_box_PUBLICKEYBYTES);
status = generate_prekeys(charlie_private_prekeys, charlie_public_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to generate Charlie's prekeys.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
return status;
}
//add alice to the user store
status = user_store_add(
store,
alice_public_identity,
alice_private_identity,
alice_public_prekeys,
alice_private_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to add Alice to the user store.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return status;
}
printf("Successfully added Alice to the user store.\n");
//check length of the user store
sodium_mprotect_readonly(store);
if (store->length != 1) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(store);
printf("Length of the user store matches.");
//list user store
list = user_store_list(store);
if (buffer_compare(list, alice_public_identity) != 0) {
fprintf(stderr, "ERROR: Failed to list users.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
buffer_destroy_from_heap(list);
user_store_destroy(store);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
printf("Successfully listed users.\n");
//add bob to the user store
status = user_store_add(
store,
bob_public_identity,
bob_private_identity,
bob_public_prekeys,
bob_private_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to add Bob to the user store.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return status;
}
printf("Successfully added Bob to the user store.\n");
//check length of the user store
sodium_mprotect_readonly(store);
if (store->length != 2) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(store);
printf("Length of the user store matches.");
//list user store
list = user_store_list(store);
if ((buffer_compare_partial(list, 0, alice_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)
|| (buffer_compare_partial(list, crypto_box_PUBLICKEYBYTES, bob_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)) {
fprintf(stderr, "ERROR: Failed to list users.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
buffer_destroy_from_heap(list);
user_store_destroy(store);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
printf("Successfully listed users.\n");
//add charlie to the user store
status = user_store_add(
store,
charlie_public_identity,
charlie_private_identity,
charlie_public_prekeys,
charlie_private_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to add Charlie to the user store.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return status;
}
printf("Successfully added Charlie to the user store.\n");
//check length of the user store
sodium_mprotect_readonly(store);
if (store->length != 3) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(store);
printf("Length of the user store matches.");
//list user store
list = user_store_list(store);
if ((buffer_compare_partial(list, 0, alice_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)
|| (buffer_compare_partial(list, crypto_box_PUBLICKEYBYTES, bob_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)
|| (buffer_compare_partial(list, 2 * crypto_box_PUBLICKEYBYTES, charlie_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)) {
fprintf(stderr, "ERROR: Failed to list users.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
buffer_destroy_from_heap(list);
user_store_destroy(store);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
printf("Successfully listed users.\n");
//find node
user_store_node *bob_node = user_store_find_node(store, bob_public_identity);
if (bob_node == NULL) {
fprintf(stderr, "ERROR: Failed to find Bob's node.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
printf("Node found.\n");
sodium_mprotect_readonly(bob_node);
if ((buffer_compare(&(bob_node->public_identity_key), bob_public_identity) != 0)
|| (buffer_compare(&(bob_node->private_identity_key), bob_private_identity) != 0)
|| (buffer_compare(&(bob_node->public_prekeys), bob_public_prekeys) != 0)
|| (buffer_compare(&(bob_node->private_prekeys), bob_private_prekeys) != 0)) {
fprintf(stderr, "ERROR: Bob's data from the user store doesn't match.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(bob_node);
printf("Data from the node matches.\n");
//remove a user identified by it's key
user_store_remove_by_key(store, bob_public_identity);
//check the length
sodium_mprotect_readonly(store);
if (store->length != 2) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(store);
printf("Length of the user store matches.");
//check the user list
list = user_store_list(store);
if ((buffer_compare_partial(list, 0, alice_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)
|| (buffer_compare_partial(list, crypto_box_PUBLICKEYBYTES, charlie_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)) {
fprintf(stderr, "ERROR: Removing user failed.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
buffer_destroy_from_heap(list);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
printf("Successfully removed user.\n");
//readd bob
status = user_store_add(
store,
bob_public_identity,
bob_private_identity,
bob_public_prekeys,
bob_private_prekeys);
if (status != 0) {
fprintf(stderr, "ERROR: Failed to readd Bob to the user store.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return status;
}
printf("Successfully readded Bob to the user store.\n");
//now find bob again
bob_node = user_store_find_node(store, bob_public_identity);
if (bob_node == NULL) {
fprintf(stderr, "ERROR: Failed to find Bob's node.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
printf("Bob's node found again.\n");
//remove bob by it's node
user_store_remove(store, bob_node);
//check the length
sodium_mprotect_readonly(store);
if (store->length != 2) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
return EXIT_FAILURE;
}
sodium_mprotect_noaccess(store);
printf("Length of the user store matches.");
//check the user list
list = user_store_list(store);
if ((buffer_compare_partial(list, 0, alice_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)
|| (buffer_compare_partial(list, crypto_box_PUBLICKEYBYTES, charlie_public_identity, 0, crypto_box_PUBLICKEYBYTES) != 0)) {
fprintf(stderr, "ERROR: Removing user failed.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
user_store_destroy(store);
buffer_destroy_from_heap(list);
return EXIT_FAILURE;
}
buffer_destroy_from_heap(list);
printf("Successfully removed user.\n");
buffer_clear(alice_private_identity);
buffer_clear(alice_private_prekeys);
buffer_clear(bob_private_identity);
buffer_clear(bob_private_prekeys);
buffer_clear(charlie_private_identity);
buffer_clear(charlie_private_prekeys);
//clear the user store
user_store_clear(store);
//check the length
sodium_mprotect_readonly(store);
if (store->length != 0) {
fprintf(stderr, "ERROR: User store has incorrect length.\n");
user_store_destroy(store);
return EXIT_FAILURE;
}
printf("Successfully cleared user store.\n");
sodium_mprotect_noaccess(store);
user_store_destroy(store);
return EXIT_SUCCESS;
}