SSL_set_retry_verify - indicate that certificate verification should be retried
#include <openssl/ssl.h> int SSL_set_retry_verify(SSL *ssl);
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.
The effect of calling SSL_set_retry_verify() outside of the certificate verification callback on the client side is undefined.
SSL_set_retry verify() returns 1 on success, 0 otherwise.
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 */
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.
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