int s2n_dh_compute_shared_secret_as_server(struct s2n_dh_params *server_dh_params, struct s2n_stuffer *Yc_in, struct s2n_blob *shared_key)
{
uint16_t Yc_length;
struct s2n_blob Yc;
int shared_key_size;
BIGNUM *pub_key;
GUARD(s2n_check_all_dh_params(server_dh_params));
GUARD(s2n_stuffer_read_uint16(Yc_in, &Yc_length));
Yc.size = Yc_length;
Yc.data = s2n_stuffer_raw_read(Yc_in, Yc.size);
notnull_check(Yc.data);
pub_key = BN_bin2bn((const unsigned char *)Yc.data, Yc.size, NULL);
notnull_check(pub_key);
GUARD(s2n_alloc(shared_key, DH_size(server_dh_params->dh)));
shared_key_size = DH_compute_key(shared_key->data, pub_key, server_dh_params->dh);
if (shared_key_size <= 0) {
BN_free(pub_key);
S2N_ERROR(S2N_ERR_DH_SHARED_SECRET);
}
shared_key->size = shared_key_size;
BN_free(pub_key);
return 0;
}
int s2n_x509_trust_store_add_pem(struct s2n_x509_trust_store *store, const char *pem)
{
notnull_check(store);
notnull_check(pem);
if (!store->trust_store) {
store->trust_store = X509_STORE_new();
}
DEFER_CLEANUP(struct s2n_stuffer pem_in_stuffer = {{0}}, s2n_stuffer_free);
DEFER_CLEANUP(struct s2n_stuffer der_out_stuffer = {{0}}, s2n_stuffer_free);
GUARD(s2n_stuffer_alloc_ro_from_string(&pem_in_stuffer, pem));
GUARD(s2n_stuffer_growable_alloc(&der_out_stuffer, 2048));
do {
DEFER_CLEANUP(struct s2n_blob next_cert = {0}, s2n_free);
GUARD(s2n_stuffer_certificate_from_pem(&pem_in_stuffer, &der_out_stuffer));
GUARD(s2n_alloc(&next_cert, s2n_stuffer_data_available(&der_out_stuffer)));
GUARD(s2n_stuffer_read(&der_out_stuffer, &next_cert));
const uint8_t *data = next_cert.data;
DEFER_CLEANUP(X509 *ca_cert = d2i_X509(NULL, &data, next_cert.size), X509_free_pointer);
S2N_ERROR_IF(ca_cert == NULL, S2N_ERR_DECODE_CERTIFICATE);
GUARD_OSSL(X509_STORE_add_cert(store->trust_store, ca_cert), S2N_ERR_DECODE_CERTIFICATE);
} while (s2n_stuffer_data_available(&pem_in_stuffer));
return 0;
}
struct s2n_connection *s2n_connection_new(s2n_mode mode)
{
struct s2n_blob blob;
struct s2n_connection *conn;
GUARD_PTR(s2n_alloc(&blob, sizeof(struct s2n_connection)));
GUARD_PTR(s2n_blob_zero(&blob));
if (mode == S2N_CLIENT) {
/* At present s2n is not suitable for use in client mode, as it
* does not perform any certificate validation. However it is useful
* to use S2N in client mode for testing purposes. An environment
* variable is required to be set for the client mode to work.
*/
if (getenv("S2N_ENABLE_CLIENT_MODE") == NULL) {
s2n_free(&blob);
S2N_ERROR_PTR(S2N_ERR_CLIENT_MODE_DISABLED);
}
}
/* Cast 'through' void to acknowledge that we are changing alignment,
* which is ok, as blob.data is always aligned.
*/
conn = (struct s2n_connection *)(void *)blob.data;
conn->mode = mode;
conn->blinding = S2N_BUILT_IN_BLINDING;
conn->config = &s2n_default_config;
/* Allocate the fixed-size stuffers */
blob.data = conn->alert_in_data;
blob.size = S2N_ALERT_LENGTH;
GUARD_PTR(s2n_stuffer_init(&conn->alert_in, &blob));
blob.data = conn->reader_alert_out_data;
blob.size = S2N_ALERT_LENGTH;
GUARD_PTR(s2n_stuffer_init(&conn->reader_alert_out, &blob));
blob.data = conn->writer_alert_out_data;
blob.size = S2N_ALERT_LENGTH;
GUARD_PTR(s2n_stuffer_init(&conn->writer_alert_out, &blob));
GUARD_PTR(s2n_stuffer_alloc(&conn->out, S2N_DEFAULT_RECORD_LENGTH));
/* Initialize the growable stuffers. Zero length at first, but the resize
* in _wipe will fix that
*/
blob.data = conn->header_in_data;
blob.size = S2N_TLS_RECORD_HEADER_LENGTH;
GUARD_PTR(s2n_stuffer_init(&conn->header_in, &blob));
GUARD_PTR(s2n_stuffer_growable_alloc(&conn->in, 0));
GUARD_PTR(s2n_stuffer_growable_alloc(&conn->handshake.io, 0));
GUARD_PTR(s2n_connection_wipe(conn));
GUARD_PTR(s2n_timer_start(conn->config, &conn->write_timer));
return conn;
}
int s2n_stuffer_alloc(struct s2n_stuffer *stuffer, const uint32_t size)
{
GUARD(s2n_alloc(&stuffer->blob, size));
GUARD(s2n_stuffer_init(stuffer, &stuffer->blob));
stuffer->alloced = 1;
return 0;
}
int s2n_dup(struct s2n_blob *from, struct s2n_blob *to)
{
eq_check(to->size, 0);
eq_check(to->data, NULL);
GUARD(s2n_alloc(to, from->size));
memcpy_check(to->data, from->data, to->size);
return 0;
}
int s2n_kem_generate_keypair(struct s2n_kem_keypair *kem_keys)
{
notnull_check(kem_keys);
const struct s2n_kem *kem = kem_keys->negotiated_kem;
notnull_check(kem->generate_keypair);
eq_check(kem_keys->public_key.size, kem->public_key_length);
notnull_check(kem_keys->public_key.data);
/* The private key is needed for client_key_recv and must be saved */
GUARD(s2n_alloc(&kem_keys->private_key, kem->private_key_length));
GUARD(kem->generate_keypair(kem_keys->public_key.data, kem_keys->private_key.data));
return 0;
}
struct s2n_map *s2n_map_new()
{
struct s2n_blob mem;
struct s2n_map *map;
GUARD_PTR(s2n_alloc(&mem, sizeof(struct s2n_map)));
map = (void *) mem.data;
map->capacity = 0;
map->size = 0;
map->immutable = 0;
map->table = NULL;
GUARD_PTR(s2n_map_embiggen(map, S2N_INITIAL_TABLE_SIZE));
return map;
}
int s2n_server_status_recv(struct s2n_connection *conn)
{
uint8_t type;
struct s2n_blob status = { .data = NULL, .size = 0 };
GUARD(s2n_stuffer_read_uint8(&conn->handshake.io, &type));
GUARD(s2n_stuffer_read_uint24(&conn->handshake.io, &status.size));
status.data = s2n_stuffer_raw_read(&conn->handshake.io, status.size);
notnull_check(status.data);
if (type == S2N_STATUS_REQUEST_OCSP) {
GUARD(s2n_alloc(&conn->status_response, status.size));
memcpy_check(conn->status_response.data, status.data, status.size);
conn->status_response.size = status.size;
}
return 0;
}
int s2n_kem_decapsulate(const struct s2n_kem_keypair *kem_keys, struct s2n_blob *shared_secret,
const struct s2n_blob *ciphertext)
{
notnull_check(kem_keys);
const struct s2n_kem *kem = kem_keys->negotiated_kem;
notnull_check(kem->decapsulate);
eq_check(kem_keys->private_key.size, kem->private_key_length);
notnull_check(kem_keys->private_key.data);
eq_check(ciphertext->size, kem->ciphertext_length);
notnull_check(ciphertext->data);
GUARD(s2n_alloc(shared_secret, kem_keys->negotiated_kem->shared_secret_key_length));
GUARD(kem->decapsulate(shared_secret->data, ciphertext->data, kem_keys->private_key.data));
return 0;
}
struct s2n_config *s2n_config_new(void)
{
struct s2n_blob allocator;
struct s2n_config *new_config;
GUARD_PTR(s2n_alloc(&allocator, sizeof(struct s2n_config)));
new_config = (struct s2n_config *)(void *)allocator.data;
new_config->cert_and_key_pairs = NULL;
new_config->dhparams = NULL;
new_config->application_protocols.data = NULL;
new_config->application_protocols.size = 0;
new_config->status_request_type = S2N_STATUS_REQUEST_NONE;
new_config->nanoseconds_since_epoch = get_nanoseconds_since_epoch;
GUARD_PTR(s2n_config_set_cipher_preferences(new_config, "default"));
return new_config;
}
int s2n_dh_compute_shared_secret_as_client(struct s2n_dh_params *server_dh_params, struct s2n_stuffer *Yc_out, struct s2n_blob *shared_key)
{
struct s2n_dh_params client_params;
uint8_t *client_pub_key;
uint16_t client_pub_key_size;
int shared_key_size;
GUARD(s2n_dh_params_check(server_dh_params));
GUARD(s2n_dh_params_copy(server_dh_params, &client_params));
GUARD(s2n_dh_generate_ephemeral_key(&client_params));
GUARD(s2n_alloc(shared_key, DH_size(server_dh_params->dh)));
const BIGNUM *client_pub_key_bn = s2n_get_Ys_dh_param(&client_params);
client_pub_key_size = BN_num_bytes(client_pub_key_bn);
GUARD(s2n_stuffer_write_uint16(Yc_out, client_pub_key_size));
client_pub_key = s2n_stuffer_raw_write(Yc_out, client_pub_key_size);
if (client_pub_key == NULL) {
GUARD(s2n_free(shared_key));
GUARD(s2n_dh_params_free(&client_params));
S2N_ERROR(S2N_ERR_DH_WRITING_PUBLIC_KEY);
}
if (BN_bn2bin(client_pub_key_bn, client_pub_key) != client_pub_key_size) {
GUARD(s2n_free(shared_key));
GUARD(s2n_dh_params_free(&client_params));
S2N_ERROR(S2N_ERR_DH_COPYING_PUBLIC_KEY);
}
/* server_dh_params already validated */
const BIGNUM *server_pub_key_bn = s2n_get_Ys_dh_param(server_dh_params);
shared_key_size = DH_compute_key(shared_key->data, server_pub_key_bn, client_params.dh);
if (shared_key_size < 0) {
GUARD(s2n_free(shared_key));
GUARD(s2n_dh_params_free(&client_params));
S2N_ERROR(S2N_ERR_DH_SHARED_SECRET);
}
shared_key->size = shared_key_size;
GUARD(s2n_dh_params_free(&client_params));
return 0;
}
static int s2n_map_embiggen(struct s2n_map *map, uint32_t capacity)
{
struct s2n_blob mem;
struct s2n_map tmp;
if (map->immutable) {
S2N_ERROR(S2N_ERR_MAP_IMMUTABLE);
}
GUARD(s2n_alloc(&mem, (capacity * sizeof(struct s2n_map_entry))));
GUARD(s2n_blob_zero(&mem));
tmp.capacity = capacity;
tmp.size = 0;
tmp.table = (void *) mem.data;
tmp.immutable = 0;
tmp.sha256 = map->sha256;
for (int i = 0; i < map->capacity; i++) {
if (map->table[i].key.size) {
GUARD(s2n_map_add(&tmp, &map->table[i].key, &map->table[i].value));
GUARD(s2n_free(&map->table[i].key));
GUARD(s2n_free(&map->table[i].value));
}
}
/* Free the old memory */
mem.data = (void *) map->table;
mem.size = map->capacity * sizeof(struct s2n_map_entry);
GUARD(s2n_free(&mem));
/* Clone the temporary map */
map->capacity = tmp.capacity;
map->size = tmp.size;
map->table = tmp.table;
map->immutable = 0;
map->sha256 = tmp.sha256;
return 0;
}
static int s2n_ecdsa_keys_match(const struct s2n_pkey *pub, const struct s2n_pkey *priv)
{
uint8_t input[16] = { 1 };
DEFER_CLEANUP(struct s2n_blob signature = { 0 }, s2n_free);
DEFER_CLEANUP(struct s2n_hash_state state_in = { 0 }, s2n_hash_free);
DEFER_CLEANUP(struct s2n_hash_state state_out = { 0 }, s2n_hash_free);
/* s2n_hash_new only allocates memory when using high-level EVP hashes, currently restricted to FIPS mode. */
GUARD(s2n_hash_new(&state_in));
GUARD(s2n_hash_new(&state_out));
GUARD(s2n_hash_init(&state_in, S2N_HASH_SHA1));
GUARD(s2n_hash_init(&state_out, S2N_HASH_SHA1));
GUARD(s2n_hash_update(&state_in, input, sizeof(input)));
GUARD(s2n_hash_update(&state_out, input, sizeof(input)));
GUARD(s2n_alloc(&signature, s2n_ecdsa_der_signature_size(priv)));
GUARD(s2n_ecdsa_sign(priv, &state_in, &signature));
GUARD(s2n_ecdsa_verify(pub, &state_out, &signature));
return 0;
}
int s2n_server_status_recv(struct s2n_connection *conn)
{
uint8_t type;
struct s2n_blob status = { .data = NULL, .size = 0 };
GUARD(s2n_stuffer_read_uint8(&conn->handshake.io, &type));
GUARD(s2n_stuffer_read_uint24(&conn->handshake.io, &status.size));
status.data = s2n_stuffer_raw_read(&conn->handshake.io, status.size);
notnull_check(status.data);
if (type == S2N_STATUS_REQUEST_OCSP) {
GUARD(s2n_alloc(&conn->status_response, status.size));
memcpy_check(conn->status_response.data, status.data, status.size);
conn->status_response.size = status.size;
}
conn->handshake.next_state = SERVER_HELLO_DONE;
if (conn->pending.cipher_suite->key_exchange_alg->flags & S2N_KEY_EXCHANGE_EPH) {
conn->handshake.next_state = SERVER_KEY;
}
return 0;
}
int s2n_config_free_cert_chain_and_key(struct s2n_config *config)
{
struct s2n_blob b = {
.data = (uint8_t *) config->cert_and_key_pairs,
.size = sizeof(struct s2n_cert_chain_and_key)
};
/* If there were cert and key pairs set, walk the chain and free the certs */
if (config->cert_and_key_pairs) {
struct s2n_cert_chain *node = config->cert_and_key_pairs->head;
while (node) {
struct s2n_blob n = {
.data = (uint8_t *)node,
.size = sizeof(struct s2n_cert_chain)
};
/* Free the cert */
GUARD(s2n_free(&node->cert));
/* Advance to next */
node = node->next;
/* Free the node */
GUARD(s2n_free(&n));
}
GUARD(s2n_rsa_private_key_free(&config->cert_and_key_pairs->private_key));
GUARD(s2n_free(&config->cert_and_key_pairs->ocsp_status));
}
GUARD(s2n_free(&b));
return 0;
}
int s2n_config_free_dhparams(struct s2n_config *config)
{
struct s2n_blob b = {
.data = (uint8_t *) config->dhparams,
.size = sizeof(struct s2n_dh_params)
};
if (config->dhparams) {
GUARD(s2n_dh_params_free(config->dhparams));
}
GUARD(s2n_free(&b));
return 0;
}
int s2n_config_free(struct s2n_config *config)
{
struct s2n_blob b = {.data = (uint8_t *) config,.size = sizeof(struct s2n_config) };
GUARD(s2n_config_free_cert_chain_and_key(config));
GUARD(s2n_config_free_dhparams(config));
GUARD(s2n_free(&config->application_protocols));
GUARD(s2n_free(&b));
return 0;
}
int s2n_config_set_cipher_preferences(struct s2n_config *config, const char *version)
{
for (int i = 0; selection[i].version != NULL; i++) {
if (!strcasecmp(version, selection[i].version)) {
config->cipher_preferences = selection[i].preferences;
return 0;
}
}
s2n_errno = S2N_ERR_INVALID_CIPHER_PREFERENCES;
return -1;
}
int s2n_config_set_protocol_preferences(struct s2n_config *config, const char * const *protocols, int protocol_count)
{
struct s2n_stuffer protocol_stuffer;
GUARD(s2n_free(&config->application_protocols));
if (protocols == NULL || protocol_count == 0) {
/* NULL value indicates no prference, so nothing to do */
return 0;
}
GUARD(s2n_stuffer_growable_alloc(&protocol_stuffer, 256));
for (int i = 0; i < protocol_count; i++) {
size_t length = strlen(protocols[i]);
uint8_t protocol[255];
if (length > 255 || (s2n_stuffer_data_available(&protocol_stuffer) + length + 1) > 65535) {
return S2N_ERR_APPLICATION_PROTOCOL_TOO_LONG;
}
memcpy_check(protocol, protocols[i], length);
GUARD(s2n_stuffer_write_uint8(&protocol_stuffer, length));
GUARD(s2n_stuffer_write_bytes(&protocol_stuffer, protocol, length));
}
uint32_t size = s2n_stuffer_data_available(&protocol_stuffer);
/* config->application_protocols blob now owns this data */
config->application_protocols.size = size;
config->application_protocols.data = s2n_stuffer_raw_read(&protocol_stuffer, size);
notnull_check(config->application_protocols.data);
return 0;
}
int s2n_config_set_status_request_type(struct s2n_config *config, s2n_status_request_type type)
{
config->status_request_type = type;
return 0;
}
int s2n_config_add_cert_chain_and_key_with_status(struct s2n_config *config,
char *cert_chain_pem, char *private_key_pem, const uint8_t *status, uint32_t length)
{
struct s2n_stuffer chain_in_stuffer, cert_out_stuffer, key_in_stuffer, key_out_stuffer;
struct s2n_blob key_blob;
struct s2n_blob mem;
/* Allocate the memory for the chain and key struct */
GUARD(s2n_alloc(&mem, sizeof(struct s2n_cert_chain_and_key)));
config->cert_and_key_pairs = (struct s2n_cert_chain_and_key *)(void *)mem.data;
config->cert_and_key_pairs->ocsp_status.data = NULL;
config->cert_and_key_pairs->ocsp_status.size = 0;
/* Put the private key pem in a stuffer */
GUARD(s2n_stuffer_alloc_ro_from_string(&key_in_stuffer, private_key_pem));
GUARD(s2n_stuffer_growable_alloc(&key_out_stuffer, strlen(private_key_pem)));
/* Convert pem to asn1 and asn1 to the private key */
GUARD(s2n_stuffer_rsa_private_key_from_pem(&key_in_stuffer, &key_out_stuffer));
GUARD(s2n_stuffer_free(&key_in_stuffer));
key_blob.size = s2n_stuffer_data_available(&key_out_stuffer);
key_blob.data = s2n_stuffer_raw_read(&key_out_stuffer, key_blob.size);
notnull_check(key_blob.data);
GUARD(s2n_asn1der_to_rsa_private_key(&config->cert_and_key_pairs->private_key, &key_blob));
GUARD(s2n_stuffer_free(&key_out_stuffer));
/* Turn the chain into a stuffer */
GUARD(s2n_stuffer_alloc_ro_from_string(&chain_in_stuffer, cert_chain_pem));
GUARD(s2n_stuffer_growable_alloc(&cert_out_stuffer, 2048));
struct s2n_cert_chain **insert = &config->cert_and_key_pairs->head;
uint32_t chain_size = 0;
do {
struct s2n_cert_chain *new_node;
if (s2n_stuffer_certificate_from_pem(&chain_in_stuffer, &cert_out_stuffer) < 0) {
if (chain_size == 0) {
S2N_ERROR(S2N_ERR_NO_CERTIFICATE_IN_PEM);
}
break;
}
GUARD(s2n_alloc(&mem, sizeof(struct s2n_cert_chain)));
new_node = (struct s2n_cert_chain *)(void *)mem.data;
GUARD(s2n_alloc(&new_node->cert, s2n_stuffer_data_available(&cert_out_stuffer)));
GUARD(s2n_stuffer_read(&cert_out_stuffer, &new_node->cert));
/* Additional 3 bytes for the length field in the protocol */
chain_size += new_node->cert.size + 3;
new_node->next = NULL;
*insert = new_node;
insert = &new_node->next;
} while (s2n_stuffer_data_available(&chain_in_stuffer));
GUARD(s2n_stuffer_free(&chain_in_stuffer));
GUARD(s2n_stuffer_free(&cert_out_stuffer));
config->cert_and_key_pairs->chain_size = chain_size;
if (status && length > 0) {
GUARD(s2n_alloc(&config->cert_and_key_pairs->ocsp_status, length));
memcpy_check(config->cert_and_key_pairs->ocsp_status.data, status, length);
}
return 0;
}
int s2n_config_add_cert_chain_and_key(struct s2n_config *config, char *cert_chain_pem, char *private_key_pem)
{
GUARD(s2n_config_add_cert_chain_and_key_with_status(config, cert_chain_pem, private_key_pem, NULL, 0));
return 0;
}
int s2n_config_add_dhparams(struct s2n_config *config, char *dhparams_pem)
{
struct s2n_stuffer dhparams_in_stuffer, dhparams_out_stuffer;
struct s2n_blob dhparams_blob;
struct s2n_blob mem;
/* Allocate the memory for the chain and key struct */
GUARD(s2n_alloc(&mem, sizeof(struct s2n_dh_params)));
config->dhparams = (struct s2n_dh_params *)(void *)mem.data;
GUARD(s2n_stuffer_alloc_ro_from_string(&dhparams_in_stuffer, dhparams_pem));
GUARD(s2n_stuffer_growable_alloc(&dhparams_out_stuffer, strlen(dhparams_pem)));
/* Convert pem to asn1 and asn1 to the private key */
GUARD(s2n_stuffer_dhparams_from_pem(&dhparams_in_stuffer, &dhparams_out_stuffer));
GUARD(s2n_stuffer_free(&dhparams_in_stuffer));
dhparams_blob.size = s2n_stuffer_data_available(&dhparams_out_stuffer);
dhparams_blob.data = s2n_stuffer_raw_read(&dhparams_out_stuffer, dhparams_blob.size);
notnull_check(dhparams_blob.data);
GUARD(s2n_pkcs3_to_dh_params(config->dhparams, &dhparams_blob));
GUARD(s2n_free(&dhparams_blob));
return 0;
}
int s2n_config_set_nanoseconds_since_epoch_callback(struct s2n_config *config, int (*nanoseconds_since_epoch)(void *, uint64_t *), void * data)
{
notnull_check(nanoseconds_since_epoch);
config->nanoseconds_since_epoch = nanoseconds_since_epoch;
config->data_for_nanoseconds_since_epoch = data;
return 0;
}
int main(int argc, char **argv)
{
struct s2n_stuffer certificate_in, certificate_out;
struct s2n_stuffer dhparams_in, dhparams_out;
struct s2n_stuffer rsa_key_in, rsa_key_out;
struct s2n_blob b;
BEGIN_TEST();
EXPECT_SUCCESS(s2n_stuffer_alloc(&certificate_in, sizeof(certificate)));
EXPECT_SUCCESS(s2n_stuffer_alloc(&certificate_out, sizeof(certificate)));
EXPECT_SUCCESS(s2n_stuffer_alloc(&dhparams_in, sizeof(dhparams)));
EXPECT_SUCCESS(s2n_stuffer_alloc(&dhparams_out, sizeof(dhparams)));
EXPECT_SUCCESS(s2n_stuffer_alloc(&rsa_key_in, sizeof(private_key)));
EXPECT_SUCCESS(s2n_stuffer_alloc(&rsa_key_out, sizeof(private_key)));
b.data = certificate;
b.size = sizeof(certificate);
EXPECT_SUCCESS(s2n_stuffer_write(&certificate_in, &b));
b.data = private_key;
b.size = sizeof(private_key);
EXPECT_SUCCESS(s2n_stuffer_write(&rsa_key_in, &b));
b.data = dhparams;
b.size = sizeof(dhparams);
EXPECT_SUCCESS(s2n_stuffer_write(&dhparams_in, &b));
EXPECT_SUCCESS(s2n_stuffer_certificate_from_pem(&certificate_in, &certificate_out));
EXPECT_SUCCESS(s2n_stuffer_rsa_private_key_from_pem(&rsa_key_in, &rsa_key_out));
EXPECT_SUCCESS(s2n_stuffer_dhparams_from_pem(&dhparams_in, &dhparams_out));
struct s2n_rsa_private_key priv_key;
struct s2n_rsa_public_key pub_key;
b.size = s2n_stuffer_data_available(&certificate_out);
b.data = s2n_stuffer_raw_read(&certificate_out, b.size);
EXPECT_SUCCESS(s2n_asn1der_to_rsa_public_key(&pub_key, &b));
b.size = s2n_stuffer_data_available(&rsa_key_out);
b.data = s2n_stuffer_raw_read(&rsa_key_out, b.size);
EXPECT_SUCCESS(s2n_asn1der_to_rsa_private_key(&priv_key, &b));
EXPECT_SUCCESS(s2n_rsa_keys_match(&pub_key, &priv_key));
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key(conn->config, (char *)chain, (char *)private_key));
struct s2n_dh_params dh_params;
b.size = s2n_stuffer_data_available(&dhparams_out);
b.data = s2n_stuffer_raw_read(&dhparams_out, b.size);
EXPECT_SUCCESS(s2n_pkcs3_to_dh_params(&dh_params, &b));
EXPECT_SUCCESS(s2n_config_add_dhparams(conn->config, (char *)dhparams));
/* Try signing and verification with RSA */
uint8_t inputpad[] = "Hello world!";
struct s2n_blob signature;
struct s2n_hash_state tls10_one, tls10_two, tls12_one, tls12_two;
EXPECT_SUCCESS(s2n_hash_init(&tls10_one, S2N_HASH_MD5_SHA1));
EXPECT_SUCCESS(s2n_hash_init(&tls10_two, S2N_HASH_MD5_SHA1));
EXPECT_SUCCESS(s2n_hash_init(&tls12_one, S2N_HASH_SHA1));
EXPECT_SUCCESS(s2n_hash_init(&tls12_two, S2N_HASH_SHA1));
EXPECT_SUCCESS(s2n_alloc(&signature, s2n_rsa_public_encrypted_size(&pub_key)));
EXPECT_SUCCESS(s2n_hash_update(&tls10_one, inputpad, sizeof(inputpad)));
EXPECT_SUCCESS(s2n_hash_update(&tls10_two, inputpad, sizeof(inputpad)));
EXPECT_SUCCESS(s2n_rsa_sign(&priv_key, &tls10_one, &signature));
EXPECT_SUCCESS(s2n_rsa_verify(&pub_key, &tls10_two, &signature));
EXPECT_SUCCESS(s2n_hash_update(&tls12_one, inputpad, sizeof(inputpad)));
EXPECT_SUCCESS(s2n_hash_update(&tls12_two, inputpad, sizeof(inputpad)));
EXPECT_SUCCESS(s2n_rsa_sign(&priv_key, &tls12_one, &signature));
EXPECT_SUCCESS(s2n_rsa_verify(&pub_key, &tls12_two, &signature));
EXPECT_SUCCESS(s2n_dh_params_free(&dh_params));
EXPECT_SUCCESS(s2n_rsa_private_key_free(&priv_key));
EXPECT_SUCCESS(s2n_rsa_public_key_free(&pub_key));
EXPECT_SUCCESS(s2n_config_free_dhparams(conn->config));
EXPECT_SUCCESS(s2n_config_free_cert_chain_and_key(conn->config));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_free(&signature));
EXPECT_SUCCESS(s2n_stuffer_free(&certificate_in));
EXPECT_SUCCESS(s2n_stuffer_free(&certificate_out));
EXPECT_SUCCESS(s2n_stuffer_free(&dhparams_in));
EXPECT_SUCCESS(s2n_stuffer_free(&dhparams_out));
EXPECT_SUCCESS(s2n_stuffer_free(&rsa_key_in));
EXPECT_SUCCESS(s2n_stuffer_free(&rsa_key_out));
END_TEST();
}
int main(int argc, char **argv) {
BEGIN_TEST();
EXPECT_SUCCESS(setenv("S2N_ENABLE_CLIENT_MODE", "1", 0));
/* Part 1 setup a client and server connection with everything they need for a key exchange */
struct s2n_connection *client_conn, *server_conn;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
struct s2n_config *server_config, *client_config;
client_config = s2n_fetch_unsafe_client_testing_config();
GUARD(s2n_connection_set_config(client_conn, client_config));
/* Part 1.1 setup server's keypair and the give the client the certificate */
char *cert_chain;
char *private_key;
char *client_chain;
EXPECT_NOT_NULL(cert_chain = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(private_key = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(client_chain = malloc(S2N_MAX_TEST_PEM_SIZE));
EXPECT_NOT_NULL(server_config = s2n_config_new());
EXPECT_SUCCESS(s2n_read_test_pem(S2N_RSA_2048_PKCS1_CERT_CHAIN, cert_chain, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_RSA_2048_PKCS1_KEY, private_key, S2N_MAX_TEST_PEM_SIZE));
EXPECT_SUCCESS(s2n_read_test_pem(S2N_RSA_2048_PKCS1_LEAF_CERT, client_chain, S2N_MAX_TEST_PEM_SIZE));
struct s2n_cert_chain_and_key *chain_and_key;
EXPECT_NOT_NULL(chain_and_key = s2n_cert_chain_and_key_new());
EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(chain_and_key, cert_chain, private_key));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, chain_and_key));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, server_config));
GUARD(s2n_set_signature_hash_pair_from_preference_list(server_conn, &server_conn->handshake_params.client_sig_hash_algs, &server_conn->secure.conn_hash_alg, &server_conn->secure.conn_sig_alg));
DEFER_CLEANUP(struct s2n_stuffer certificate_in = {{0}}, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&certificate_in, S2N_MAX_TEST_PEM_SIZE));
DEFER_CLEANUP(struct s2n_stuffer certificate_out = {{0}}, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_alloc(&certificate_out, S2N_MAX_TEST_PEM_SIZE));
struct s2n_blob temp_blob;
temp_blob.data = (uint8_t *) client_chain;
temp_blob.size = strlen(client_chain) + 1;
EXPECT_SUCCESS(s2n_stuffer_write(&certificate_in, &temp_blob));
EXPECT_SUCCESS(s2n_stuffer_certificate_from_pem(&certificate_in, &certificate_out));
temp_blob.size = s2n_stuffer_data_available(&certificate_out);
temp_blob.data = s2n_stuffer_raw_read(&certificate_out, temp_blob.size);
s2n_cert_type cert_type;
EXPECT_SUCCESS(s2n_asn1der_to_public_key_and_type(&client_conn->secure.server_public_key, &cert_type, &temp_blob));
server_conn->handshake_params.our_chain_and_key = chain_and_key;
EXPECT_SUCCESS(setup_connection(server_conn));
EXPECT_SUCCESS(setup_connection(client_conn));
#if S2N_LIBCRYPTO_SUPPORTS_CUSTOM_RAND
/* Read the seed from the RSP_FILE and create the DRBG for the test. Since the seed is the same (and prediction
* resistance is off) all calls to generate random data will return the same sequence. Thus the server always
* generates the same ECDHE point and KEM public key, the client does the same. */
FILE *kat_file = fopen(RSP_FILE_NAME, "r");
EXPECT_NOT_NULL(kat_file);
EXPECT_SUCCESS(s2n_alloc(&kat_entropy_blob, 48));
EXPECT_SUCCESS(ReadHex(kat_file, kat_entropy_blob.data, 48, "seed = "));
struct s2n_drbg drbg = {.entropy_generator = &s2n_entropy_generator};
s2n_stack_blob(personalization_string, 32, 32);
EXPECT_SUCCESS(s2n_drbg_instantiate(&drbg, &personalization_string, S2N_DANGEROUS_AES_256_CTR_NO_DF_NO_PR));
EXPECT_SUCCESS(s2n_set_private_drbg_for_test(drbg));
#endif
/* Part 2 server sends key first */
EXPECT_SUCCESS(s2n_server_key_send(server_conn));
/* Part 2.1 verify the results as best we can */
EXPECT_EQUAL(server_conn->handshake.io.write_cursor, SERVER_KEY_MESSAGE_LENGTH);
struct s2n_blob server_key_message = {.size = SERVER_KEY_MESSAGE_LENGTH, .data = s2n_stuffer_raw_read(&server_conn->handshake.io, SERVER_KEY_MESSAGE_LENGTH)};
#if S2N_LIBCRYPTO_SUPPORTS_CUSTOM_RAND
/* Part 2.1.1 if we're running in known answer mode check the server's key exchange message matches the expected value */
uint8_t expected_server_key_message[SERVER_KEY_MESSAGE_LENGTH];
EXPECT_SUCCESS(ReadHex(kat_file, expected_server_key_message, SERVER_KEY_MESSAGE_LENGTH, "expected_server_key_exchange = "));
EXPECT_BYTEARRAY_EQUAL(expected_server_key_message, server_key_message.data, SERVER_KEY_MESSAGE_LENGTH);
#endif
/* Part 2.2 copy server's message to the client's stuffer */
s2n_stuffer_write(&client_conn->handshake.io, &server_key_message);
/* Part 3 client recvs the server's key and sends the client key exchange message */
EXPECT_SUCCESS(s2n_server_key_recv(client_conn));
EXPECT_SUCCESS(s2n_client_key_send(client_conn));
/* Part 3.1 verify the results as best we can */
EXPECT_EQUAL(client_conn->handshake.io.write_cursor - client_conn->handshake.io.read_cursor, CLIENT_KEY_MESSAGE_LENGTH);
struct s2n_blob client_key_message = {.size = CLIENT_KEY_MESSAGE_LENGTH, .data = s2n_stuffer_raw_read(&client_conn->handshake.io, CLIENT_KEY_MESSAGE_LENGTH)};
#if S2N_LIBCRYPTO_SUPPORTS_CUSTOM_RAND
/* Part 3.1.1 if we're running in known answer mode check the client's key exchange message matches the expected value */
uint8_t expected_client_key_message[CLIENT_KEY_MESSAGE_LENGTH];
EXPECT_SUCCESS(ReadHex(kat_file, expected_client_key_message, CLIENT_KEY_MESSAGE_LENGTH, "expected_client_key_exchange = "));
EXPECT_BYTEARRAY_EQUAL(expected_client_key_message, client_key_message.data, CLIENT_KEY_MESSAGE_LENGTH);
#endif
/* Part 3.2 copy the client's message back to the server's stuffer */
s2n_stuffer_write(&server_conn->handshake.io, &client_key_message);
/* Part 4 server receives the client's message */
EXPECT_SUCCESS(s2n_client_key_recv(server_conn));
/* Part 4.1 verify results as best we can, the client and server should at least have the same master secret */
EXPECT_BYTEARRAY_EQUAL(server_conn->secure.master_secret, client_conn->secure.master_secret, S2N_TLS_SECRET_LEN);
#if S2N_LIBCRYPTO_SUPPORTS_CUSTOM_RAND
/* Part 4.1.1 if we're running in known answer mode check that both the client and server got the expected master secret
* from the RSP_FILE */
uint8_t expected_master_secret[S2N_TLS_SECRET_LEN];
EXPECT_SUCCESS(ReadHex(kat_file, expected_master_secret, S2N_TLS_SECRET_LEN, "expected_master_secret = "));
EXPECT_BYTEARRAY_EQUAL(expected_master_secret, client_conn->secure.master_secret, S2N_TLS_SECRET_LEN);
EXPECT_BYTEARRAY_EQUAL(expected_master_secret, server_conn->secure.master_secret, S2N_TLS_SECRET_LEN);
#endif
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(chain_and_key));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_config_free(server_config));
free(cert_chain);
free(client_chain);
free(private_key);
#if S2N_LIBCRYPTO_SUPPORTS_CUSTOM_RAND
/* Extra cleanup needed for the known answer test */
fclose(kat_file);
#endif
END_TEST();
}