NAME

       SSL_set_retry_verify - indicate that certificate verification should be retried

SYNOPSIS

        #include <openssl/ssl.h>

        int SSL_set_retry_verify(SSL *ssl);

DESCRIPTION

       SSL_set_retry_verify() should be called from the certificate verification callback on a
       client when the application wants to indicate that the handshake should be suspended and
       the control should be returned to the application.  SSL_want_retry_verify(3) will return 1
       as a consequence until the handshake is resumed again by the application, retrying the
       verification step.

       Please refer to SSL_CTX_set_cert_verify_callback(3) for further details.

NOTES

       The effect of calling SSL_set_retry_verify() outside of the certificate verification
       callback on the client side is undefined.

RETURN VALUES

       SSL_set_retry verify() returns 1 on success, 0 otherwise.

EXAMPLES

       The following code snippet shows how to obtain the SSL object associated with the
       X509_STORE_CTX to call the SSL_set_retry_verify() function:

           int idx = SSL_get_ex_data_X509_STORE_CTX_idx();
           SSL *ssl;

           /* this should not happen but check anyway */
           if (idx < 0
               || (ssl = X509_STORE_CTX_get_ex_data(ctx, idx)) == NULL)
               return 0;

           if (/* we need to retry verification callback */)
               return SSL_set_retry_verify(ssl);

           /* do normal processing of the verification callback */

SEE ALSO

       ssl(7), SSL_connect(3), SSL_CTX_set_cert_verify_callback(3), SSL_want_retry_verify(3)

HISTORY

       SSL_set_retry_verify() was added in OpenSSL 3.0.2 to replace backwards incompatible
       handling of a negative return value from the verification callback.

COPYRIGHT

       Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except
       in compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.