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140 .IX Title "SSL_get_ex_data_X509_STORE_CTX_idx 3"
141 .TH SSL_get_ex_data_X509_STORE_CTX_idx 3 "0.9.7a" "2003-02-19" "OpenSSL"
144 SSL_get_ex_data_X509_STORE_CTX_idx \- get ex_data index to access \s-1SSL\s0 structure
147 .IX Header "SYNOPSIS"
149 \& #include <openssl/ssl.h>
152 \& int SSL_get_ex_data_X509_STORE_CTX_idx(void);
155 .IX Header "DESCRIPTION"
156 \&\fISSL_get_ex_data_X509_STORE_CTX_idx()\fR returns the index number under which
157 the pointer to the \s-1SSL\s0 object is stored into the X509_STORE_CTX object.
160 Whenever a X509_STORE_CTX object is created for the verification of the
161 peers certificate during a handshake, a pointer to the \s-1SSL\s0 object is
162 stored into the X509_STORE_CTX object to identify the connection affected.
163 To retrieve this pointer the \fIX509_STORE_CTX_get_ex_data()\fR function can
164 be used with the correct index. This index is globally the same for all
165 X509_STORE_CTX objects and can be retrieved using
166 \&\fISSL_get_ex_data_X509_STORE_CTX_idx()\fR. The index value is set when
167 \&\fISSL_get_ex_data_X509_STORE_CTX_idx()\fR is first called either by the application
168 program directly or indirectly during other \s-1SSL\s0 setup functions or during
171 The value depends on other index values defined for X509_STORE_CTX objects
172 before the \s-1SSL\s0 index is created.
174 .IX Header "RETURN VALUES"
177 The index value to access the pointer.
180 An error occurred, check the error stack for a detailed error message.
182 .IX Header "EXAMPLES"
183 The index returned from \fISSL_get_ex_data_X509_STORE_CTX_idx()\fR allows to
184 access the \s-1SSL\s0 object for the connection to be accessed during the
185 \&\fIverify_callback()\fR when checking the peers certificate. Please check
186 the example in SSL_CTX_set_verify(3),
188 .IX Header "SEE ALSO"
189 ssl(3), SSL_CTX_set_verify(3),
190 CRYPTO_set_ex_data(3)