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Diffstat (limited to 'secure/lib/libcrypto/man/man3/SSL_CTX_set_session_id_context.3')
-rw-r--r-- | secure/lib/libcrypto/man/man3/SSL_CTX_set_session_id_context.3 | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/man3/SSL_CTX_set_session_id_context.3 b/secure/lib/libcrypto/man/man3/SSL_CTX_set_session_id_context.3 new file mode 100644 index 000000000000..aa394e133059 --- /dev/null +++ b/secure/lib/libcrypto/man/man3/SSL_CTX_set_session_id_context.3 @@ -0,0 +1,215 @@ +.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.39) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +SSL_CTX_set_session_id_context, SSL_set_session_id_context \- set context within which session can be reused (server side only) +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ssl.h> +\& +\& int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, +\& unsigned int sid_ctx_len); +\& int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, +\& unsigned int sid_ctx_len); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBSSL_CTX_set_session_id_context()\fR sets the context \fBsid_ctx\fR of length +\&\fBsid_ctx_len\fR within which a session can be reused for the \fBctx\fR object. +.PP +\&\fBSSL_set_session_id_context()\fR sets the context \fBsid_ctx\fR of length +\&\fBsid_ctx_len\fR within which a session can be reused for the \fBssl\fR object. +.SH "NOTES" +.IX Header "NOTES" +Sessions are generated within a certain context. When exporting/importing +sessions with \fBi2d_SSL_SESSION\fR/\fBd2i_SSL_SESSION\fR it would be possible, +to re-import a session generated from another context (e.g. another +application), which might lead to malfunctions. Therefore each application +must set its own session id context \fBsid_ctx\fR which is used to distinguish +the contexts and is stored in exported sessions. The \fBsid_ctx\fR can be +any kind of binary data with a given length, it is therefore possible +to use e.g. the name of the application and/or the hostname and/or service +name ... +.PP +The session id context becomes part of the session. The session id context +is set by the \s-1SSL/TLS\s0 server. The \fBSSL_CTX_set_session_id_context()\fR and +\&\fBSSL_set_session_id_context()\fR functions are therefore only useful on the +server side. +.PP +OpenSSL clients will check the session id context returned by the server +when reusing a session. +.PP +The maximum length of the \fBsid_ctx\fR is limited to +\&\fB\s-1SSL_MAX_SID_CTX_LENGTH\s0\fR. +.SH "WARNINGS" +.IX Header "WARNINGS" +If the session id context is not set on an \s-1SSL/TLS\s0 server and client +certificates are used, stored sessions +will not be reused but a fatal error will be flagged and the handshake +will fail. +.PP +If a server returns a different session id context to an OpenSSL client +when reusing a session, an error will be flagged and the handshake will +fail. OpenSSL servers will always return the correct session id context, +as an OpenSSL server checks the session id context itself before reusing +a session as described above. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fBSSL_CTX_set_session_id_context()\fR and \fBSSL_set_session_id_context()\fR +return the following values: +.IP "0" 4 +The length \fBsid_ctx_len\fR of the session id context \fBsid_ctx\fR exceeded +the maximum allowed length of \fB\s-1SSL_MAX_SID_CTX_LENGTH\s0\fR. The error +is logged to the error stack. +.IP "1" 4 +.IX Item "1" +The operation succeeded. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBssl\fR\|(7) +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2001\-2019 The OpenSSL Project Authors. All Rights Reserved. +.PP +Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file \s-1LICENSE\s0 in the source distribution or at +<https://www.openssl.org/source/license.html>. |