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/*
* Ouroboros - Copyright (C) 2016 - 2024
*
* Test of the cryptography functions
*
* Dimitri Staessens <dimitri@ouroboros.rocks>
* Sander Vrijders <sander@ouroboros.rocks>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., http://www.fsf.org/about/contact/.
*/
#include "config.h"
#include <ouroboros/test.h>
#include <ouroboros/crypt.h>
#include <ouroboros/random.h>
#include <ouroboros/utils.h>
#define TEST_PACKET_SIZE 1500
static int test_crypt_create_destroy(void)
{
struct crypt_ctx * ctx;
TEST_START();
ctx = crypt_create_ctx(0, NULL);
if (ctx == NULL) {
printf("Failed to initialize cryptography.\n");
goto fail;
}
crypt_destroy_ctx(ctx);
TEST_SUCCESS();
return TEST_RC_SUCCESS;
fail:
TEST_FAIL();
return TEST_RC_FAIL;
}
static int test_crypt_create_destroy_with_key(void)
{
struct crypt_ctx * ctx;
uint8_t key[SYMMKEYSZ];
TEST_START();
memset(key, 0, sizeof(key));
ctx = crypt_create_ctx(1, key);
if (ctx == NULL) {
printf("Failed to initialize cryptography.\n");
goto fail;
}
crypt_destroy_ctx(ctx);
TEST_SUCCESS();
return TEST_RC_SUCCESS;
fail:
TEST_FAIL();
return TEST_RC_FAIL;
}
static int test_crypt_dh_pkp_create_destroy(void)
{
void * pkp;
uint8_t buf[MSGBUFSZ];
TEST_START();
if (crypt_dh_pkp_create(&pkp, buf) < 0) {
printf("Failed to create DH PKP.");
goto fail;
}
crypt_dh_pkp_destroy(pkp);
TEST_SUCCESS();
return TEST_RC_SUCCESS;
fail:
TEST_FAIL();
return TEST_RC_FAIL;
}
static int test_crypt_dh_derive(void)
{
void * pkp1;
void * pkp2;
buffer_t pk1;
buffer_t pk2;
ssize_t len;
uint8_t buf1[MSGBUFSZ];
uint8_t buf2[MSGBUFSZ];
uint8_t s1[SYMMKEYSZ];
uint8_t s2[SYMMKEYSZ];
TEST_START();
len = crypt_dh_pkp_create(&pkp1, buf1);
if (len < 0) {
printf("Failed to create first key pair.");
goto fail_pkp1;
}
pk1.len = (size_t) len;
pk1.data = buf1;
len = crypt_dh_pkp_create(&pkp2, buf2);
if (len < 0) {
printf("Failed to create second key pair.");
goto fail_pkp2;
}
pk2.len = (size_t) len;
pk2.data = buf2;
if (crypt_dh_derive(pkp1, pk2, s1) < 0) {
printf("Failed to derive first key.");
goto fail;
}
if (crypt_dh_derive(pkp2, pk1, s2) < 0) {
printf("Failed to derive second key.");
goto fail;
}
if (memcmp(s1, s2, SYMMKEYSZ) != 0) {
printf("Derived keys do not match.");
goto fail;
}
crypt_dh_pkp_destroy(pkp2);
crypt_dh_pkp_destroy(pkp1);
TEST_SUCCESS();
return TEST_RC_SUCCESS;
fail:
crypt_dh_pkp_destroy(pkp2);
fail_pkp2:
crypt_dh_pkp_destroy(pkp1);
fail_pkp1:
TEST_FAIL();
return TEST_RC_FAIL;
}
int test_crypt_encrypt_decrypt(void)
{
uint8_t pkt[TEST_PACKET_SIZE];
uint8_t key[SYMMKEYSZ];
struct crypt_ctx * ctx;
buffer_t in;
buffer_t out;
buffer_t out2;
TEST_START();
if (random_buffer(key, sizeof(key)) < 0) {
printf("Failed to generate random key.\n");
goto fail_init;
}
if (random_buffer(pkt, sizeof(pkt)) < 0) {
printf("Failed to generate random data.\n");
goto fail_init;
}
ctx = crypt_create_ctx(1, key);
if (ctx == NULL) {
printf("Failed to initialize cryptography.\n");
goto fail_init;
}
in.len = sizeof(pkt);
in.data = pkt;
if (crypt_encrypt(ctx, in, &out) < 0) {
printf("Encryption failed.\n");
goto fail_encrypt;
}
if (out.len < in.len) {
printf("Encryption returned too little data.\n");
goto fail_encrypt;
}
if (crypt_decrypt(ctx, out, &out2) < 0) {
printf("Decryption failed.\n");
goto fail_decrypt;
}
if (out2.len != in.len) {
printf("Decrypted data length does not match original.\n");
goto fail_chk;
}
if (memcmp(in.data, out2.data, in.len) != 0) {
printf("Decrypted data does not match original.\n");
goto fail_chk;
}
crypt_destroy_ctx(ctx);
TEST_SUCCESS();
return TEST_RC_SUCCESS;
fail_chk:
freebuf(out2);
fail_decrypt:
freebuf(out);
fail_encrypt:
crypt_destroy_ctx(ctx);
fail_init:
TEST_FAIL();
return TEST_RC_FAIL;
}
int crypt_test(int argc,
char ** argv)
{
int ret = 0;
(void) argc;
(void) argv;
ret |= test_crypt_create_destroy();
ret |= test_crypt_create_destroy_with_key();
#ifdef HAVE_OPENSSL
ret |= test_crypt_dh_pkp_create_destroy();
ret |= test_crypt_dh_derive();
ret |= test_crypt_encrypt_decrypt();
#else
(void) test_crypt_dh_pkp_create_destroy;
(void) test_crypt_dh_derive;
(void) test_crypt_encrypt_decrypt;
ret = TEST_RC_SKIP;
#endif
return ret;
}
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