=pod

=head1 NAME

CMS_ReceiptRequest_create0, CMS_add1_ReceiptRequest, CMS_get1_ReceiptRequest, CMS_ReceiptRequest_get0_values - CMS signed receipt request functions

=head1 SYNOPSIS

 #include <openssl/cms.h>

 CMS_ReceiptRequest *CMS_ReceiptRequest_create0(unsigned char *id, int idlen,

                                                int allorfirst,

                                                STACK_OF(GENERAL_NAMES) *receiptList,

                                                STACK_OF(GENERAL_NAMES) *receiptsTo);

 int CMS_add1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest *rr);

 int CMS_get1_ReceiptRequest(CMS_SignerInfo *si, CMS_ReceiptRequest **prr);

 void CMS_ReceiptRequest_get0_values(CMS_ReceiptRequest *rr, ASN1_STRING **pcid,

                                     int *pallorfirst,

                                     STACK_OF(GENERAL_NAMES) **plist,

                                     STACK_OF(GENERAL_NAMES) **prto);

=head1 DESCRIPTION

CMS_ReceiptRequest_create0() creates a signed receipt request structure. The

B<signedContentIdentifier> field is set using B<id> and B<idlen>, or it is set

to 32 bytes of pseudo random data if B<id> is NULL. If B<receiptList> is NULL

the allOrFirstTier option in B<receiptsFrom> is used and set to the value of

the B<allorfirst> parameter. If B<receiptList> is not NULL the B<receiptList>

option in B<receiptsFrom> is used. The B<receiptsTo> parameter specifies the

B<receiptsTo> field value.

The CMS_add1_ReceiptRequest() function adds a signed receipt request B<rr>

to SignerInfo structure B<si>.

int CMS_get1_ReceiptRequest() looks for a signed receipt request in B<si>, if

any is found it is decoded and written to B<prr>.

CMS_ReceiptRequest_get0_values() retrieves the values of a receipt request.

The signedContentIdentifier is copied to B<pcid>. If the B<allOrFirstTier>

option of B<receiptsFrom> is used its value is copied to B<pallorfirst>

otherwise the B<receiptList> field is copied to B<plist>. The B<receiptsTo>

parameter is copied to B<prto>.

=head1 NOTES

For more details of the meaning of the fields see RFC2634.

The contents of a signed receipt should only be considered meaningful if the

corresponding CMS_ContentInfo structure can be successfully verified using

CMS_verify().

=head1 RETURN VALUES

CMS_ReceiptRequest_create0() returns a signed receipt request structure or

NULL if an error occurred.

CMS_add1_ReceiptRequest() returns 1 for success or 0 if an error occurred.

CMS_get1_ReceiptRequest() returns 1 is a signed receipt request is found and

decoded. It returns 0 if a signed receipt request is not present and -1 if

it is present but malformed.

=head1 SEE ALSO

L<ERR_get_error(3)>, L<CMS_sign(3)>,

L<CMS_sign_receipt(3)>, L<CMS_verify(3)>

L<CMS_verify_receipt(3)>

=head1 COPYRIGHT

Copyright 2008-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the "License").  You may not use

this file except in compliance with the License.  You can obtain a copy

in the file LICENSE in the source distribution or at

L<https://www.openssl.org/source/license.html>.

=cut