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 peer's 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(3) 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() provides access
to SSL object for the connection during the
verify_callback() when checking the peer's
certificate. Please check the example in
SSL_CTX_set_verify(3).