int calc_sha256 (void)
{
const int bufSize = 256;
int bytesRead = 0;
unsigned char hash[SHA256_DIGEST_LENGTH];
unsigned char* buffer;
if (!raw_file) return -1;
buffer = malloc(bufSize);
if(!buffer) return -1;
SHA256_CTX sha256;
SHA256_Init(&sha256);
while((bytesRead = fread(buffer, 1, bufSize, raw_file)))
{
SHA256_Update(&sha256, buffer, bytesRead);
}
SHA256_Final(hash, &sha256);
sha256_hash_string(hash, calc_hash);
free(buffer);
fseek(raw_file, 0L, SEEK_SET);
return 0;
}
static int
sha256_file (char *path, char outputBuffer[65])
{
int bytesRead;
unsigned char *buffer;
unsigned char hash[SHA256_DIGEST_LENGTH];
SHA256_CTX sha256;
FILE *file = fopen (path, "rb");
if (!file)
{
return -534;
}
SHA256_Init (&sha256);
buffer = malloc (BUFSIZE);
bytesRead = 0;
if (!buffer)
{
return ENOMEM;
}
while ((bytesRead = fread (buffer, 1, BUFSIZE, file)))
{
SHA256_Update (&sha256, buffer, bytesRead);
}
SHA256_Final (hash, &sha256);
sha256_hash_string (hash, outputBuffer);
fclose (file);
free (buffer);
return 0;
}
cell_t dgst_sha256(IPluginContext *pContext, const cell_t *params)
{
char *path;
char buffer[PLATFORM_MAX_PATH];
// Get input file to calculate
pContext->LocalToString(params[3], &path);
unsigned char hash[SHA256_DIGEST_LENGTH];
char output[65];
// Open file and calculate hash
smutils->BuildPath(Path_Game, buffer, PLATFORM_MAX_PATH, path);
if(calc_sha256(buffer, hash) == -1)
return -1;
// Convert digest into human readable hex string
sha256_hash_string(hash, output);
// Set return buffer
pContext->StringToLocalUTF8(params[1], params[2], output, NULL);
return 0;
}
