Updated: 2022/Sep/29

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SSL_set_retry_verify(3)             OpenSSL            SSL_set_retry_verify(3)



NAME
       SSL_set_retry_verify - indicate that certificate verification should be
       retried

LIBRARY
       libcrypto, -lcrypto

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>.



3.0.12                            2023-05-07           SSL_set_retry_verify(3)