OpenSSL/Pre-defined BIOs

Filter BIOs

 * BIO_f_base64
 * BIO_f_buffer
 * BIO_f_cipher
 * BIO_f_md
 * BIO_f_ssl

Source/sink BIOs

 * BIO_s_accept
 * BIO_s_bio
 * BIO_s_connect
 * BIO_s_fd
 * BIO_s_file
 * BIO_s_mem
 * BIO_s_null
 * BIO_s_socket