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CentOS 7.0 - man page for gnutls_ocsp_resp_verify (centos section 3)

gnutls_ocsp_resp_verify(3)				gnutls				   gnutls_ocsp_resp_verify(3)

gnutls_ocsp_resp_verify - API function
#include <gnutls/ocsp.h> int gnutls_ocsp_resp_verify(gnutls_ocsp_resp_t resp, gnutls_x509_trust_list_t trustlist, unsigned int * ver- ify, unsigned int flags);
gnutls_ocsp_resp_t resp should contain a gnutls_ocsp_resp_t structure gnutls_x509_trust_list_t trustlist trust anchors as a gnutls_x509_trust_list_t structure unsigned int * verify output variable with verification status, an gnutls_ocsp_cert_status_t unsigned int flags verification flags, 0 for now.
Verify signature of the Basic OCSP Response against the public key in the certificate of a trusted signer. The trustlist should be populated with trust anchors. The function will extract the signer certificate from the Basic OCSP Response and will verify it against the trustlist . A trusted signer is a certificate that is either in trustlist , or it is signed directly by a certificate in trustlist and has the id-ad-ocspSigning Extended Key Usage bit set. The output verify variable will hold verification status codes (e.g., GNUTLS_OCSP_VERIFY_SIGNER_NOT_FOUND, GNUTLS_OCSP_VERIFY_INSECURE_ALGORITHM) which are only valid if the function returned GNUTLS_E_SUCCESS. Note that the function returns GNUTLS_E_SUCCESS even when verification failed. The caller must always inspect the verify variable to find out the verification status. The flags variable should be 0 for now.
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value.
Report bugs to <bug-gnutls@gnu.org>. General guidelines for reporting bugs: http://www.gnu.org/gethelp/ GnuTLS home page: http://www.gnu.org/software/gnutls/
Copyright (C) 2012 Free Software Foundation, Inc.. Copying and distribution of this file, with or without modification, are permitted in any medium without roy- alty provided the copyright notice and this notice are preserved.
The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command info gnutls should give you access to the complete manual. As an alternative you may obtain the manual from: http://www.gnu.org/software/gnutls/manual/ gnutls 3.1.15 gnutls_ocsp_resp_verify(3)

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