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Diffstat (limited to 'secure/lib/libssl/man/SSL_CTX_set_cert_verify_callback.3')
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diff --git a/secure/lib/libssl/man/SSL_CTX_set_cert_verify_callback.3 b/secure/lib/libssl/man/SSL_CTX_set_cert_verify_callback.3
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-.\" ======================================================================
-.\"
-.IX Title "SSL_CTX_set_cert_verify_callback 3"
-.TH SSL_CTX_set_cert_verify_callback 3 "0.9.7a" "2003-02-19" "OpenSSL"
-.UC
-.SH "NAME"
-SSL_CTX_set_cert_verify_callback \- set peer certificate verification procedure
-.SH "SYNOPSIS"
-.IX Header "SYNOPSIS"
-.Vb 1
-\& #include <openssl/ssl.h>
-.Ve
-.Vb 1
-\& void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*callback)(X509_STORE_CTX *,void *), void *arg);
-.Ve
-.SH "DESCRIPTION"
-.IX Header "DESCRIPTION"
-\&\fISSL_CTX_set_cert_verify_callback()\fR sets the verification callback function for
-\&\fIctx\fR. \s-1SSL\s0 objects that are created from \fIctx\fR inherit the setting valid at
-the time when SSL_new(3) is called.
-.SH "NOTES"
-.IX Header "NOTES"
-Whenever a certificate is verified during a \s-1SSL/TLS\s0 handshake, a verification
-function is called. If the application does not explicitly specify a
-verification callback function, the built-in verification function is used.
-If a verification callback \fIcallback\fR is specified via
-\&\fISSL_CTX_set_cert_verify_callback()\fR, the supplied callback function is called
-instead. By setting \fIcallback\fR to \s-1NULL\s0, the default behaviour is restored.
-.PP
-When the verification must be performed, \fIcallback\fR will be called with
-the arguments callback(X509_STORE_CTX *x509_store_ctx, void *arg). The
-argument \fIarg\fR is specified by the application when setting \fIcallback\fR.
-.PP
-\&\fIcallback\fR should return 1 to indicate verification success and 0 to
-indicate verification failure. If \s-1SSL_VERIFY_PEER\s0 is set and \fIcallback\fR
-returns 0, the handshake will fail. As the verification procedure may
-allow to continue the connection in case of failure (by always returning 1)
-the verification result must be set in any case using the \fBerror\fR
-member of \fIx509_store_ctx\fR so that the calling application will be informed
-about the detailed result of the verification procedure!
-.PP
-Within \fIx509_store_ctx\fR, \fIcallback\fR has access to the \fIverify_callback\fR
-function set using SSL_CTX_set_verify(3).
-.SH "WARNINGS"
-.IX Header "WARNINGS"
-Do not mix the verification callback described in this function with the
-\&\fBverify_callback\fR function called during the verification process. The
-latter is set using the SSL_CTX_set_verify(3)
-family of functions.
-.PP
-Providing a complete verification procedure including certificate purpose
-settings etc is a complex task. The built-in procedure is quite powerful
-and in most cases it should be sufficient to modify its behaviour using
-the \fBverify_callback\fR function.
-.SH "BUGS"
-.IX Header "BUGS"
-.SH "RETURN VALUES"
-.IX Header "RETURN VALUES"
-\&\fISSL_CTX_set_cert_verify_callback()\fR does not provide diagnostic information.
-.SH "SEE ALSO"
-.IX Header "SEE ALSO"
-ssl(3), SSL_CTX_set_verify(3),
-SSL_get_verify_result(3),
-SSL_CTX_load_verify_locations(3)
-.SH "HISTORY"
-.IX Header "HISTORY"
-Previous to OpenSSL 0.9.7, the \fIarg\fR argument to \fBSSL_CTX_set_cert_verify_callback\fR
-was ignored, and \fIcallback\fR was called simply as
- int (*callback)(X509_STORE_CTX *)
-To compile software written for previous versions of OpenSSL, a dummy
-argument will have to be added to \fIcallback\fR.