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/*
* Copyright 2021 Yubico AB
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#undef NDEBUG
#include <assert.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <yubihsm.h>
const char *key_label = "label";
const uint8_t password[] = "password";
const uint8_t plaintext[16] = "singleblock msg";
int main(void) {
yh_connector *connector = NULL;
yh_session *session = NULL;
yh_rc yrc = YHR_GENERIC_ERROR;
int r = EXIT_FAILURE;
const char *connector_url;
connector_url = getenv("DEFAULT_CONNECTOR_URL");
if (connector_url == NULL) {
connector_url = DEFAULT_CONNECTOR_URL;
}
yrc = yh_init();
assert(yrc == YHR_SUCCESS);
yrc = yh_init_connector(connector_url, &connector);
assert(yrc == YHR_SUCCESS);
yrc = yh_connect(connector, 0);
assert(yrc == YHR_SUCCESS);
yrc = yh_create_session_derived(connector, 1, password, sizeof(password) - 1,
false, &session);
assert(yrc == YHR_SUCCESS);
uint8_t session_id;
yrc = yh_get_session_id(session, &session_id);
assert(yrc == YHR_SUCCESS);
printf("Successfully established session %02d\n", session_id);
yh_algorithm algorithms[YH_MAX_ALGORITHM_COUNT];
size_t algorithm_count = YH_MAX_ALGORITHM_COUNT;
yrc = yh_util_get_device_info(connector, NULL, NULL, NULL, NULL, NULL, NULL,
algorithms, &algorithm_count);
assert(yrc == YHR_SUCCESS);
int state = 0; /* unsupported */
for (size_t i = 0; i < algorithm_count; i++) {
if (algorithms[i] == YH_ALGO_AES_ECB) {
state |= 0x01;
} else if (algorithms[i] == YH_ALGO_AES_CBC) {
state |= 0x02;
}
}
if (state != 0x03) {
fprintf(stderr, "ECB/CBC unsupported or disabled (%#04x)\n", state);
r = 64; /* arbitrarily chosen */
goto done;
}
yh_capabilities capabilities = {{0}};
yrc =
yh_string_to_capabilities("encrypt-ecb,decrypt-ecb,encrypt-cbc,decrypt-cbc",
&capabilities);
assert(yrc == YHR_SUCCESS);
uint16_t domain_five = 0;
yrc = yh_string_to_domains("5", &domain_five);
assert(yrc == YHR_SUCCESS);
uint16_t aes_key_id = 0;
yrc = yh_util_generate_aes_key(session, &aes_key_id, key_label, domain_five,
&capabilities, YH_ALGO_AES256);
assert(yrc == YHR_SUCCESS);
printf("Generated AES key with ID %04x\n", aes_key_id);
uint8_t data[16];
size_t data_len = sizeof(data);
yrc = yh_util_encrypt_aes_ecb(session, aes_key_id, plaintext,
sizeof(plaintext), data, &data_len);
assert(yrc == YHR_SUCCESS);
assert(memcmp(data, plaintext, sizeof(plaintext)) != 0);
printf("AES-ECB encryption successful\n");
yrc = yh_util_decrypt_aes_ecb(session, aes_key_id, data, data_len, data,
&data_len);
assert(yrc == YHR_SUCCESS);
assert(data_len == sizeof(plaintext));
assert(memcmp(data, plaintext, sizeof(plaintext)) == 0);
printf("AES-ECB decryption successful\n");
uint8_t iv[16];
size_t iv_len = sizeof(iv);
yrc = yh_util_get_pseudo_random(session, 16, iv, &iv_len);
assert(yrc == YHR_SUCCESS);
yrc = yh_util_encrypt_aes_cbc(session, aes_key_id, iv, plaintext,
sizeof(plaintext), data, &data_len);
assert(yrc == YHR_SUCCESS);
assert(memcmp(data, plaintext, sizeof(plaintext)) != 0);
printf("AES-CBC encryption successful\n");
yrc = yh_util_decrypt_aes_cbc(session, aes_key_id, iv, data, data_len, data,
&data_len);
assert(yrc == YHR_SUCCESS);
assert(data_len == sizeof(plaintext));
assert(memcmp(data, plaintext, sizeof(plaintext)) == 0);
printf("AES-CBC decryption successful\n");
r = EXIT_SUCCESS;
done:
yrc = yh_util_close_session(session);
assert(yrc == YHR_SUCCESS);
yrc = yh_destroy_session(&session);
assert(yrc == YHR_SUCCESS);
yh_disconnect(connector);
assert(yrc == YHR_SUCCESS);
yrc = yh_exit();
assert(yrc == YHR_SUCCESS);
return r;
}
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