1bio(3)                              OpenSSL                             bio(3)
2
3
4

NAME

6       bio - I/O abstraction
7

SYNOPSIS

9        #include <openssl/bio.h>
10
11       TBA
12

DESCRIPTION

14       A BIO is an I/O abstraction, it hides many of the underlying I/O
15       details from an application. If an application uses a BIO for its I/O
16       it can transparently handle SSL connections, unencrypted network
17       connections and file I/O.
18
19       There are two type of BIO, a source/sink BIO and a filter BIO.
20
21       As its name implies a source/sink BIO is a source and/or sink of data,
22       examples include a socket BIO and a file BIO.
23
24       A filter BIO takes data from one BIO and passes it through to another,
25       or the application. The data may be left unmodified (for example a
26       message digest BIO) or translated (for example an encryption BIO). The
27       effect of a filter BIO may change according to the I/O operation it is
28       performing: for example an encryption BIO will encrypt data if it is
29       being written to and decrypt data if it is being read from.
30
31       BIOs can be joined together to form a chain (a single BIO is a chain
32       with one component). A chain normally consist of one source/sink BIO
33       and one or more filter BIOs. Data read from or written to the first BIO
34       then traverses the chain to the end (normally a source/sink BIO).
35

SEE ALSO

37       BIO_ctrl(3), BIO_f_base64(3), BIO_f_buffer(3), BIO_f_cipher(3),
38       BIO_f_md(3), BIO_f_null(3), BIO_f_ssl(3), BIO_find_type(3), BIO_new(3),
39       BIO_new_bio_pair(3), BIO_push(3), BIO_read(3), BIO_s_accept(3),
40       BIO_s_bio(3), BIO_s_connect(3), BIO_s_fd(3), BIO_s_file(3),
41       BIO_s_mem(3), BIO_s_null(3), BIO_s_socket(3), BIO_set_callback(3),
42       BIO_should_retry(3)
43
44
45
461.0.2o                            2019-09-10                            bio(3)