test for binary file read

crack.c

@@ -17,6 +17,7 @@ void check_guess(BYTE guess[], BYTE pwd[PWD_NUMBERS][SHA256_BLOCK_SIZE]);
 int main(int argc, char** argv) {
 
     if (argc == 1) {
+        // record 30 passwords
         FILE* pwdfp;
         unsigned char buffer[SHA256_BLOCK_SIZE];
 
@@ -25,6 +26,8 @@ int main(int argc, char** argv) {
         // read 32 bytes to buffer
         fread(buffer, SHA256_BLOCK_SIZE, 1, pwdfp);
 
+        printf("%s", buffer);
+
         fclose(pwdfp);
 
     } else if (argc == 2) {