[#SSL_CTX_set_session_id_context]
= SSL_CTX_set_session_id_context
:mrdocs:

Set the server‐side session‐id context within which sessions may be reused for a context.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_CTX_set_session_id_context(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    unsigned char const* sid_ctx,
    unsigned int sid_ctx_len);
----

== Return Value

1 on success, or 0 if `sid_ctx_len` is too large.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context (server) whose sid_ctx is set and inherited by new SSL objects.
| *sid_ctx*
| Opaque application context bytes stored with exported sessions.
| *sid_ctx_len*
| Length of `sid_ctx` (must not exceed SSL_MAX_SID_CTX_LENGTH).
|===


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