unsigned char buf[64];
char buf[64];
int rsakey_encrypted(char *filename, char **comment){    FILE *fp;    unsigned char buf[64];    fp = fopen(filename, "rb");    if (!fp)	return 0;		       /* doesn't even exist */    /*     * Read the first line of the file and see if it's a v1 private     * key file.     */    if (fgets(buf, sizeof(buf), fp) && !strcmp(buf, rsa_signature)) {	return loadrsakey_main(fp, NULL, FALSE, comment, NULL);    }    fclose(fp);    return 0;			       /* wasn't the right kind of file */}