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SSL_get_ex_data_X509_STORE_CTX_idx(3)
NAME
SSL_get_ex_data_X509_STORE_CTX_idx - get ex_data index to access SSL structure from X509_STORE_CTX
SYNOPSIS
#include <openssl/ssl.h>
int SSL_get_ex_data_X509_STORE_CTX_idx(void);
DESCRIPTION
SSL_get_ex_data_X509_STORE_CTX_idx() returns the index number
under which the pointer to the SSL object is stored into the X509_STORE_CTX
object.
NOTES
Whenever a X509_STORE_CTX object is created for the verification of the
peers certificate during a handshake, a pointer to the SSL object is stored
into the X509_STORE_CTX object to identify the connection affected. To
retrieve this pointer the X509_STORE_CTX_get_ex_data()
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
SSL_get_ex_data_X509_STORE_CTX_idx(). The index value is set
when SSL_get_ex_data_X509_STORE_CTX_idx() is first called
either by the application program directly or indirectly during other SSL
setup functions or during the handshake.
The value depends on other index values defined for X509_STORE_CTX objects before the SSL index is created.
RETURN VALUES
- >=0
-
The index value to access the pointer.
- <0
-
An error occurred, check the error stack for a detailed error message.
EXAMPLES
The index returned from SSL_get_ex_data_X509_STORE_CTX_idx()
allows to access the SSL object for the connection to be accessed during
the verify_callback() when checking the peers certificate.
Please check the example in SSL_CTX_set_verify(3),
SEE ALSO
