openssl_bio(3)
- NetBSD Manual Pages
bio(3) OpenSSL bio(3)
NAME
bio - I/O abstraction
LIBRARY
libcrypto, -lcrypto
SYNOPSIS
#include <openssl/bio.h>
TBA
DESCRIPTION
A BIO is an I/O abstraction, it hides many of the underly-
ing I/O details from an application. If an application
uses a BIO for its I/O it can transparently handle SSL
connections, unencrypted network connections and file I/O.
There are two type of BIO, a source/sink BIO and a filter
BIO.
As its name implies a source/sink BIO is a source and/or
sink of data, examples include a socket BIO and a file
BIO.
A filter BIO takes data from one BIO and passes it through
to another, or the application. The data may be left
unmodified (for example a message digest BIO) or trans-
lated (for example an encryption BIO). The effect of a
filter BIO may change according to the I/O operation it is
performing: for example an encryption BIO will encrypt
data if it is being written to and decrypt data if it is
being read from.
BIOs can be joined together to form a chain (a single BIO
is a chain with one component). A chain normally consist
of one source/sink BIO and one or more filter BIOs. Data
read from or written to the first BIO then traverses the
chain to the end (normally a source/sink BIO).
SEE ALSO
BIO_ctrl(3), BIO_f_base64(3), BIO_f_buffer(3),
BIO_f_cipher(3), BIO_f_md(3), BIO_f_null(3), BIO_f_ssl(3),
BIO_find_type(3), BIO_new(3), BIO_new_bio_pair(3),
BIO_push(3), BIO_read(3), BIO_s_accept(3), BIO_s_bio(3),
BIO_s_connect(3), BIO_s_fd(3), BIO_s_file(3),
BIO_s_mem(3), BIO_s_null(3), BIO_s_socket(3),
BIO_set_callback(3), BIO_should_retry(3)
2001-07-11 0.9.6g 1
Powered by man-cgi (2024-03-20).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.