SSL_set_session.3ossl 6.3 KB

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  133. .\" ========================================================================
  134. .\"
  135. .IX Title "SSL_SET_SESSION 3ossl"
  136. .TH SSL_SET_SESSION 3ossl "2024-09-03" "3.3.2" "OpenSSL"
  137. .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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  139. .if n .ad l
  140. .nh
  141. .SH "NAME"
  142. SSL_set_session \- set a TLS/SSL session to be used during TLS/SSL connect
  143. .SH "SYNOPSIS"
  144. .IX Header "SYNOPSIS"
  145. .Vb 1
  146. \& #include <openssl/ssl.h>
  147. \&
  148. \& int SSL_set_session(SSL *ssl, SSL_SESSION *session);
  149. .Ve
  150. .SH "DESCRIPTION"
  151. .IX Header "DESCRIPTION"
  152. \&\fBSSL_set_session()\fR sets \fBsession\fR to be used when the \s-1TLS/SSL\s0 connection
  153. is to be established. \fBSSL_set_session()\fR is only useful for \s-1TLS/SSL\s0 clients.
  154. When the session is set, the reference count of \fBsession\fR is incremented
  155. by 1. If the session is not reused, the reference count is decremented
  156. again during \fBSSL_connect()\fR. Whether the session was reused can be queried
  157. with the \fBSSL_session_reused\fR\|(3) call.
  158. .PP
  159. If there is already a session set inside \fBssl\fR (because it was set with
  160. \&\fBSSL_set_session()\fR before or because the same \fBssl\fR was already used for
  161. a connection), \fBSSL_SESSION_free()\fR will be called for that session.
  162. This is also the case when \fBsession\fR is a \s-1NULL\s0 pointer. If that old
  163. session is still \fBopen\fR, it is considered bad and will be removed from the
  164. session cache (if used). A session is considered open, if \fBSSL_shutdown\fR\|(3) was
  165. not called for the connection (or at least \fBSSL_set_shutdown\fR\|(3) was used to
  166. set the \s-1SSL_SENT_SHUTDOWN\s0 state).
  167. .SH "NOTES"
  168. .IX Header "NOTES"
  169. \&\s-1SSL_SESSION\s0 objects keep internal link information about the session cache
  170. list, when being inserted into one \s-1SSL_CTX\s0 object's session cache.
  171. One \s-1SSL_SESSION\s0 object, regardless of its reference count, must therefore
  172. only be used with one \s-1SSL_CTX\s0 object (and the \s-1SSL\s0 objects created
  173. from this \s-1SSL_CTX\s0 object).
  174. .SH "RETURN VALUES"
  175. .IX Header "RETURN VALUES"
  176. The following return values can occur:
  177. .IP "0" 4
  178. The operation failed; check the error stack to find out the reason.
  179. .IP "1" 4
  180. .IX Item "1"
  181. The operation succeeded.
  182. .SH "SEE ALSO"
  183. .IX Header "SEE ALSO"
  184. \&\fBssl\fR\|(7), \fBSSL_SESSION_free\fR\|(3),
  185. \&\fBSSL_get_session\fR\|(3),
  186. \&\fBSSL_session_reused\fR\|(3),
  187. \&\fBSSL_CTX_set_session_cache_mode\fR\|(3)
  188. .SH "COPYRIGHT"
  189. .IX Header "COPYRIGHT"
  190. Copyright 2000\-2022 The OpenSSL Project Authors. All Rights Reserved.
  191. .PP
  192. Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
  193. this file except in compliance with the License. You can obtain a copy
  194. in the file \s-1LICENSE\s0 in the source distribution or at
  195. <https://www.openssl.org/source/license.html>.