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.. _ssl_api:
SSL and TLS
========================================
.. versionadded:: 1.9.4
Botan supports both client and server implementations of the SSL/TLS
protocols, including SSL v3, TLS v1.0, and TLS v1.1. The insecure and
obsolete SSL v2 is not supported.
The implementation uses ``std::tr1::function``, so it may not have
been compiled into the version you are using; you can test for the
feature macro ``BOTAN_HAS_SSL_TLS`` to check.
TLS Clients
----------------------------------------
.. cpp:class:: TLS_Client
.. cpp:function:: TLS_Client( \
std::tr1::function<size_t, byte*, size_t> input_fn, \
std::tr1::function<void, const byte*, size_t> output_fn, \
const TLS_Policy& policy, RandomNumberGenerator& rng)
Creates a TLS client. It will call *input_fn* to read bytes from
the network and call *output_fn* when bytes need to be written to
the network.
.. cpp:function:: size_t read(byte* buf, size_t buf_len)
Reads up to *buf_len* bytes from the open connection into *buf*,
returning the number of bytes actually written.
.. cpp:function:: void write(const byte* buf, size_t buf_len)
Writes *buf_len* bytes in *buf* to the remote side
.. cpp:function:: void close()
Closes the connection
.. cpp:function:: std::vector<X509_Certificate> peer_cert_chain()
Returns the certificate chain of the server
A simple TLS client example:
.. literalinclude:: examples/tls_client.cpp
TLS Servers
----------------------------------------
A simple TLS server
.. literalinclude:: examples/tls_server.cpp
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