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// Basic fuzz test for encapsulate operation.
#include <stddef.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
extern "C" {
#include "crypto_api.h"
#include "hash.c"
#undef randombytes
#define USE_SNTRUP761X25519 1
#ifdef SNTRUP761_NO_ASM
# undef __GNUC__
#endif
void randombytes(unsigned char *ptr, size_t l);
volatile crypto_int16 crypto_int16_optblocker = 0;
volatile crypto_int32 crypto_int32_optblocker = 0;
volatile crypto_int64 crypto_int64_optblocker = 0;
#include "sntrup761.c"
static int real_random;
void
randombytes(unsigned char *ptr, size_t l)
{
if (real_random)
arc4random_buf(ptr, l);
else
memset(ptr, 0, l);
}
int LLVMFuzzerTestOneInput(const uint8_t* input, size_t len)
{
unsigned char pk[crypto_kem_sntrup761_PUBLICKEYBYTES];
unsigned char ciphertext[crypto_kem_sntrup761_CIPHERTEXTBYTES];
unsigned char secret[crypto_kem_sntrup761_BYTES];
memset(&pk, 0, sizeof(pk));
if (len > sizeof(pk)) {
len = sizeof(pk);
}
memcpy(pk, input, len);
real_random = 0;
(void)crypto_kem_sntrup761_enc(ciphertext, secret, pk);
real_random = 1;
(void)crypto_kem_sntrup761_enc(ciphertext, secret, pk);
return 0;
}
} // extern
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