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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_get_ex_data_X509_STORE_CTX_idx \- get ex_data index to access SSL structure from X509_STORE_CTX .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& int SSL_get_ex_data_X509_STORE_CTX_idx(void); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_get_ex_data_X509_STORE_CTX_idx()\fR returns the index number under which the pointer to the \s-1SSL\s0 object is stored into the X509_STORE_CTX object. .SH "NOTES" .IX Header "NOTES" Whenever a X509_STORE_CTX object is created for the verification of the peers certificate during a handshake, a pointer to the \s-1SSL\s0 object is stored into the X509_STORE_CTX object to identify the connection affected. To retrieve this pointer the \fBX509_STORE_CTX_get_ex_data()\fR function can be used with the correct index. This index is globally the same for all X509_STORE_CTX objects and can be retrieved using \&\fBSSL_get_ex_data_X509_STORE_CTX_idx()\fR. The index value is set when \&\fBSSL_get_ex_data_X509_STORE_CTX_idx()\fR is first called either by the application program directly or indirectly during other \s-1SSL\s0 setup functions or during the handshake. .PP The value depends on other index values defined for X509_STORE_CTX objects before the \s-1SSL\s0 index is created. .SH "RETURN VALUES" .IX Header "RETURN VALUES" .IP ">=0" 4 .IX Item ">=0" The index value to access the pointer. .IP "<0" 4 .IX Item "<0" An error occurred, check the error stack for a detailed error message. .SH "EXAMPLES" .IX Header "EXAMPLES" The index returned from \fBSSL_get_ex_data_X509_STORE_CTX_idx()\fR allows to access the \s-1SSL\s0 object for the connection to be accessed during the \&\fBverify_callback()\fR when checking the peers certificate. Please check the example in \fBSSL_CTX_set_verify\fR\\|(3), .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\\|(3), \fBSSL_CTX_set_verify\fR\\|(3), \&\fBCRYPTO_set_ex_data\fR\\|(3)