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| #include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <openssl/evp.h>
#include <assert.h>
#include <unistd.h>
#ifdef USE_LIBAFL
__AFL_FUZZ_INIT();
#endif
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
const uint8_t key[16] = {0x80, 0xc7, 0x9e, 0x14, 0xef, 0x09, 0xbd, 0x42, 0x0b, 0x1f, 0x80, 0x98, 0x82, 0x6b, 0x12, 0xfd};
const uint8_t iv[16] = {0x80, 0xc7, 0x9e, 0x14, 0xef, 0x09, 0xbd, 0x42, 0x0b, 0x1f, 0x80, 0x98, 0x82, 0x6b, 0x12, 0xfd};
char dest[1024] = {0};
size_t data_size = size;
if (size >= 4)
{
size = ((uint32_t *) data)[0];
}
FILE *fp = fopen("debug.log", "a");
if (fp) {
fprintf(fp, "input size: %zu\n", size);
}
uint8_t *msg = NULL;
if (size > 0) {
msg = (uint8_t*)malloc(size);
if (!msg) return 0;
for (size_t i = 0; i < size; i++) {
msg[i] = data[i % data_size];
}
}
const EVP_CIPHER* cipher = EVP_aes_128_cbc();
EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new();
assert(ctx != NULL);
size_t out_size = size;
size_t blockSize = EVP_CIPHER_block_size(cipher);
size_t out_len1 = out_size + blockSize;
uint8_t *out = (uint8_t*)malloc(out_len1);
if (!out) {
if (msg) free(msg);
EVP_CIPHER_CTX_free(ctx);
return 0;
}
size_t len1 = 0, len2 = 0;
assert(EVP_EncryptInit_ex(ctx, cipher, NULL, key, iv) == 1);
unsigned char dummy_data[10] = {0};
assert(EVP_EncryptUpdate(ctx, out, &len1, dummy_data, sizeof(dummy_data)) == 1);
if (size > 0 && msg) {
assert(EVP_EncryptUpdate(ctx, out, &len1, msg, size) == 1);
} else {
len1 = 0;
}
assert(EVP_EncryptFinal_ex(ctx, out + len1, &len2) == 1);
size_t total_len = len1 + len2;
if (fp) {
fprintf(fp, "total_len: %zu\n", total_len);
fclose(fp);
}
assert(total_len > 0);
if (msg) free(msg);
free(out);
EVP_CIPHER_CTX_free(ctx);
return 0;
}
int main() {
const char* input_file = getenv("FUZZ_INPUT_FILE");
if (input_file) {
FILE *fp = fopen(input_file, "rb");
if (!fp) {
perror("fopen");
return 1;
}
fseek(fp, 0, SEEK_END);
long filesize = ftell(fp);
fseek(fp, 0, SEEK_SET);
if (filesize <= 0) {
fclose(fp);
return 1;
}
uint8_t *buf = malloc(filesize);
if (!buf) {
fclose(fp);
return 1;
}
fread(buf, 1, filesize, fp);
fclose(fp);
LLVMFuzzerTestOneInput(buf, filesize);
free(buf);
return 0;
}
#ifdef USE_LIBAFL
__AFL_INIT();
unsigned char *buf = __AFL_FUZZ_TESTCASE_BUF;
size_t len = __AFL_FUZZ_TESTCASE_LEN;
LLVMFuzzerTestOneInput(buf, len);
#else
uint8_t buffer[65536];
ssize_t result = read(STDIN_FILENO, buffer, sizeof(buffer));
if (result > 0) {
LLVMFuzzerTestOneInput(buffer, result);
} else {
const uint8_t test_data[] = {0x41, 0x42, 0x43, 0x44};
LLVMFuzzerTestOneInput(test_data, sizeof(test_data));
}
#endif
return 0;
}
|
