1SSL_clear(3) OpenSSL SSL_clear(3)
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6 SSL_clear - reset SSL object to allow another connection
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9 #include <openssl/ssl.h>
10 int SSL_clear(SSL *ssl);
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14 Reset ssl to allow another connection. All settings (method, ciphers,
15 BIOs) are kept.
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18 SSL_clear is used to prepare an SSL object for a new connection. While
19 all settings are kept, a side effect is the handling of the current SSL
20 session. If a session is still open, it is considered bad and will be
21 removed from the session cache, as required by RFC2246. A session is
22 considered open, if SSL_shutdown(3) was not called for the connection
23 or at least SSL_set_shutdown(3) was used to set the SSL_SENT_SHUTDOWN
24 state.
25 If a session was closed cleanly, the session object will be kept and
27 all settings corresponding. This explicitly means, that e.g. the
28 special method used during the session will be kept for the next
29 handshake. So if the session was a TLSv1 session, a SSL client object
30 will use a TLSv1 client method for the next handshake and a SSL server
31 object will use a TLSv1 server method, even if SSLv23_*_methods were
32 chosen on startup. This will might lead to connection failures (see
33 SSL_new(3)) for a description of the method's properties.
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36 SSL_clear() resets the SSL object to allow for another connection. The
37 reset operation however keeps several settings of the last sessions
38 (some of these settings were made automatically during the last
39 handshake). It only makes sense when opening a new session (or reusing
40 an old one) with the same peer that shares these settings. SSL_clear()
41 is not a short form for the sequence SSL_free(3); SSL_new(3); .
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44 The following return values can occur:
45 0 The SSL_clear() operation could not be performed. Check the error
47 stack to find out the reason.
48 1 The SSL_clear() operation was successful.
50 SSL_new(3), SSL_free(3), SSL_shutdown(3), SSL_set_shutdown(3),
52 SSL_CTX_set_options(3), ssl(3), SSL_CTX_set_client_cert_cb(3)
531.0.0e 2002-02-27 SSL_clear(3)