SSL_get_ex_data_X509_STORE_CTX_idx(3)

     SSL_get_ex_data_X509_ST0.9<I>..6SS<I>(L_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
          ssl(3), SSL_CTX_set_verify(3), CRYPTO_set_ex_data(3)

     Page 1                                         (printed 1/19/103)