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Title "SSL_SET_RETRY_VERIFY 3ossl" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
SSL_set_retry_verify - indicate that certificate verification should be retried Header "SYNOPSIS" .Vb 1 #include <openssl/ssl.h> \& int SSL_set_retry_verify(SSL *ssl); .Ve Header "DESCRIPTION" \fBSSL_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. \fBSSL_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.

Header "NOTES" The effect of calling SSL_set_retry_verify() outside of the certificate verification callback on the client side is undefined. Header "RETURN VALUES" SSL_set_retry verify() returns 1 on success, 0 otherwise. Header "EXAMPLES" The following code snippet shows how to obtain the \s-1SSL\s0 object associated with the X509_STORE_CTX to call the SSL_set_retry_verify() function:

.Vb 2 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 */ .Ve

Header "SEE ALSO" \fBssl\|(7), SSL_connect\|(3), SSL_CTX_set_cert_verify_callback\|(3), \fBSSL_want_retry_verify\|(3) Header "HISTORY" \fBSSL_set_retry_verify() was added in OpenSSL 3.0.2 to replace backwards incompatible handling of a negative return value from the verification callback. Header "COPYRIGHT" Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.