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
ssl(3), SSL_CTX_set_verify(3), CRYPTO_set_ex_data(3)
