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/*
* Copyright 2015-2018 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.
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include "util.h"
#include "openssl-compat.h"
#include <yubihsm.h>
const char *key_label = "label";
const uint8_t password[] = "password";
const uint8_t data[] = "sudo make me a sandwich";
int main(void) {
yh_connector *connector = NULL;
yh_session *session = NULL;
yh_rc yrc = YHR_GENERIC_ERROR;
uint16_t authkey = 1;
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, authkey, 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_capabilities capabilities = {{0}};
yrc = yh_string_to_capabilities("sign-pkcs", &capabilities);
assert(yrc == YHR_SUCCESS);
uint16_t domain_five = 0;
yrc = yh_string_to_domains("5", &domain_five);
assert(yrc == YHR_SUCCESS);
uint16_t key_id = 0; // ID 0 lets the device generate an ID
yrc = yh_util_generate_rsa_key(session, &key_id, key_label, domain_five,
&capabilities, YH_ALGO_RSA_2048);
assert(yrc == YHR_SUCCESS);
printf("Generated key with ID %04x\n", key_id);
printf("Data to sign (%zu bytes) is: %s\n", sizeof(data) - 1, data);
EVP_MD_CTX *mdctx = NULL;
uint8_t hashed_data[32];
unsigned int hashed_data_len;
mdctx = EVP_MD_CTX_create();
assert(mdctx != NULL);
EVP_DigestInit_ex(mdctx, EVP_sha256(), NULL);
EVP_DigestUpdate(mdctx, data, sizeof(data) - 1);
EVP_DigestFinal_ex(mdctx, hashed_data, &hashed_data_len);
EVP_MD_CTX_destroy(mdctx);
printf("Hash of data (%d bytes) is:", EVP_MD_size(EVP_sha256()));
for (unsigned int i = 0; i < hashed_data_len; i++) {
printf(" %02x", hashed_data[i]);
}
printf("\n");
uint8_t signature[512];
size_t signature_len = sizeof(signature);
yrc = yh_util_sign_pkcs1v1_5(session, key_id, true, hashed_data,
hashed_data_len, signature, &signature_len);
assert(yrc == YHR_SUCCESS);
printf("Signature (%zu bytes) is:", signature_len);
for (unsigned int i = 0; i < signature_len; i++) {
printf(" %02x", signature[i]);
}
printf("\n");
uint8_t public_key[512];
size_t public_key_len = sizeof(public_key);
yrc =
yh_util_get_public_key(session, key_id, public_key, &public_key_len, NULL);
assert(yrc == YHR_SUCCESS);
printf("Public key (%zu bytes) is:", public_key_len);
for (unsigned int i = 0; i < public_key_len; i++) {
printf(" %02x", public_key[i]);
}
printf("\n");
BIGNUM *n = BN_bin2bn(public_key, public_key_len, NULL);
assert(n != NULL);
BIGNUM *e = BN_bin2bn((const unsigned char *) "\x01\x00\x01", 3, NULL);
assert(e != NULL);
RSA *rsa = RSA_new();
assert(RSA_set0_key(rsa, n, e, NULL) != 0);
if (RSA_verify(EVP_MD_type(EVP_sha256()), hashed_data, hashed_data_len,
signature, signature_len, rsa) == 1) {
printf("Signature successfully verified\n");
} else {
printf("Unable to verify signature\n");
}
RSA_free(rsa);
rsa = NULL;
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 0;
}
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