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/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: noscrypt
* Package: noscrypt
* File: test.c
*
* noscrypt is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 2 of the License,
* or (at your option) any later version.
*
* noscrypt 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 noscrypt. If not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <noscrypt.h>
#include <mbedtls/sha256.h>
#include <mbedtls/platform_util.h>
#if defined(_MSC_VER) || defined(WIN32) || defined(_WIN32)
#define IS_WINDOWS
#endif
#ifdef IS_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <wincrypt.h>
#endif
#ifdef IS_WINDOWS
//Prints a string literal to the console
#define PRINTL(x) printf(x); printf("\r\n");
#define TEST(x) printf("\tTesting %s\n", #x); if(!(x)) { printf("TEST FAILED!\n"); return 1; } else { printf("\tTest passed\n\n"); }
#define TASSERT(x) if(!(x)) { printf("ERROR! Internal test assumption failed: %s.\n Aborting tests...\n", #x); ExitProcess(1); }
#define ENSURE(x) if(!(x)) { printf("Assumption failed! %s\n", #x); return 1; }
#else
//Prints a string literal to the console
#define PRINTL(x) printf(x); printf("\n");
#define TEST(x) printf("\tTesting %s\n", #x); if(!(x)) { printf("TEST FAILED!\n"); return 1; } else { printf("\tTest passed\n\n"); }
#define TASSERT(x) if(!(x)) { printf("Internal assumption failed: %s\n", #x); exit(1); }
#define ENSURE(x) if(!(x)) { printf("Assumption failed!\n"); return 1; }
#endif
#ifdef IS_WINDOWS
#define ZERO_FILL(x, size) SecureZeroMemory(x, size)
#else
#define ZERO_FILL(x, size) memset(x, 0, size)
#endif
static void FillRandomData(void* pbBuffer, size_t length);
static int TestEcdsa(NCContext* context, NCSecretKey* secKey, NCPublicKey* pubKey);
static int InitKepair(NCContext* context, NCSecretKey* secKey, NCPublicKey* pubKey);
static const uint8_t zero32[32] = { 0 };
static const uint8_t zero64[64] = { 0 };
int main(void)
{
NCContext ctx;
uint8_t ctxRandom[32];
NCSecretKey secKey;
NCPublicKey pubKey;
PRINTL("Begining basic noscrypt tests\n")
FillRandomData(ctxRandom, 32);
//Context struct size should aways match the size of the struct returned by NCGetContextStructSize
TEST(NCGetContextStructSize() == sizeof(NCContext))
TEST(NCInitContext(&ctx, ctxRandom) == NC_SUCCESS)
if (InitKepair(&ctx, &secKey, &pubKey) != 0)
{
return 1;
}
if (TestEcdsa(&ctx, &secKey, &pubKey) != 0)
{
return 1;
}
PRINTL("ECDSA tests passed\n")
TEST(NCDestroyContext(&ctx) == NC_SUCCESS)
return 0;
}
static void _sha256(const uint8_t* data, size_t length, uint8_t digest[32])
{
mbedtls_sha256_context sha256;
mbedtls_sha256_init(&sha256);
TASSERT(0 == mbedtls_sha256_starts(&sha256, 0))
TASSERT(0 == mbedtls_sha256_update(&sha256, data, length))
TASSERT(0 == mbedtls_sha256_finish(&sha256, digest))
mbedtls_sha256_free(&sha256);
}
static const char* message = "Test message to sign";
static int InitKepair(NCContext* context, NCSecretKey* secKey, NCPublicKey* pubKey)
{
PRINTL("TEST: Keypair")
//Get random private key
FillRandomData(secKey, sizeof(NCSecretKey));
//Ensure not empty
ENSURE(memcmp(zero32, secKey, 32) != 0);
//Ensure the key is valid
TEST(NCValidateSecretKey(context, secKey) == NC_SUCCESS);
//Generate a public key from the secret key
TEST(NCGetPublicKey(context, secKey, pubKey) == NC_SUCCESS);
return 0;
}
static int TestEcdsa(NCContext* context, NCSecretKey* secKey, NCPublicKey* pubKey)
{
uint8_t digestToSign[32];
uint8_t sigEntropy[32];
uint8_t invalidSig[64];
PRINTL("TEST: Ecdsa")
//Init a new secret key with random data
FillRandomData(invalidSig, sizeof(invalidSig));
FillRandomData(sigEntropy, sizeof(sigEntropy));
//compute sha256 of the test string
_sha256((uint8_t*)message, strlen(message), digestToSign);
//Sign and verify digest
{
uint8_t sig[64];
TEST(NCSignDigest(context, secKey, sigEntropy, digestToSign, sig) == NC_SUCCESS);
TEST(NCVerifyDigest(context, pubKey, digestToSign, sig) == NC_SUCCESS);
}
//Sign and verify raw data
{
uint8_t sig[64];
TEST(NCSignData(context, secKey, sigEntropy, (uint8_t*)message, strlen(message), sig) == NC_SUCCESS);
TEST(NCVerifyData(context, pubKey, (uint8_t*)message, strlen(message), sig) == NC_SUCCESS);
}
//ensure the signature is the same for signing data and digest
{
uint8_t sig1[64];
uint8_t sig2[64];
//Ensure operations succeed but dont print them as test cases
ENSURE(NCSignData(context, secKey, sigEntropy, (uint8_t*)message, strlen(message), sig1) == NC_SUCCESS);
ENSURE(NCSignDigest(context, secKey, sigEntropy, digestToSign, sig2) == NC_SUCCESS);
//Perform test
TEST(memcmp(sig1, sig2, 64) == 0);
}
//Try signing data then veriyfing the digest
{
uint8_t sig[64];
ENSURE(NCSignData(context, secKey, sigEntropy, (uint8_t*)message, strlen(message), sig) == NC_SUCCESS);
TEST(NCVerifyDigest(context, pubKey, digestToSign, sig) == NC_SUCCESS);
//Now invert test, zero signature to ensure its overwritten
ZERO_FILL(sig, sizeof(sig));
ENSURE(NCSignDigest(context, secKey, sigEntropy, digestToSign, sig) == NC_SUCCESS);
TEST(NCVerifyData(context, pubKey, (uint8_t*)message, strlen(message), sig) == NC_SUCCESS);
}
//test verification of invalid signature
{
TEST(NCVerifyDigest(context, pubKey, digestToSign, invalidSig) == E_INVALID_ARG);
}
return 0;
}
static void FillRandomData(void* pbBuffer, size_t length)
{
#ifdef IS_WINDOWS
HCRYPTPROV hCryptProv;
TASSERT(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0));
TASSERT(CryptGenRandom(hCryptProv, (DWORD)length, pbBuffer))
TASSERT(CryptReleaseContext(hCryptProv, 0));
#else
FILE* f = fopen("/dev/urandom", "rb");
TASSERT(f != NULL);
TASSERT(fread(pbBuffer, 1, length, f) == length);
fclose(f);
#endif
}
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