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=pod
=head1 NAME
CMS_sign_receipt - create a CMS signed receipt
=head1 SYNOPSIS
#include <openssl/cms.h>
CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si, X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, unsigned int flags);
=head1 DESCRIPTION
CMS_sign_receipt() creates and returns a CMS signed receipt structure. B<si> is
the B<CMS_SignerInfo> structure containing the signed receipt request.
B<signcert> is the certificate to sign with, B<pkey> is the corresponding
private key. B<certs> is an optional additional set of certificates to include
in the CMS structure (for example any intermediate CAs in the chain).
B<flags> is an optional set of flags.
=head1 NOTES
This functions behaves in a similar way to CMS_sign() except the flag values
B<CMS_DETACHED>, B<CMS_BINARY>, B<CMS_NOATTR>, B<CMS_TEXT> and B<CMS_STREAM>
are not supported since they do not make sense in the context of signed
receipts.
=head1 RETURN VALUES
CMS_sign_receipt() returns either a valid CMS_ContentInfo structure or NULL if
an error occurred. The error can be obtained from ERR_get_error(3).
=head1 SEE ALSO
L<ERR_get_error(3)|ERR_get_error(3)>,
L<CMS_verify_receipt(3)|CMS_verify_receipt(3)>,
L<CMS_sign(3)|CMS_sign(3)>
=head1 HISTORY
CMS_sign_receipt() was added to OpenSSL 0.9.8
=cut