BIO_printf(bio_err,"%-14s encrypt\n","-e");
BIO_printf(bio_err,"%-14s decrypt\n","-d");
BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");
BIO_printf(bio_err,"%-14s encrypt\n","-e");
BIO_printf(bio_err,"%-14s decrypt\n","-d");
BIO_printf(bio_err,"%-14s base64 encode/decode, depending on encryption flag\n","-a/-base64");