CMS_sign_receipt - create a CMS signed receipt

       Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                             CMS_SIGN_RECEIPT(3SSL)

CMS_sign_receipt() creates and returns a CMS signed receipt structure. si is the CMS_SignerInfo structure
       containing the signed receipt request.  signcert is the certificate to sign with, pkey is the
       corresponding private key.  certs is an optional additional set of certificates to include in the CMS
       structure (for example any intermediate CAs in the chain).

       flags is an optional set of flags.

       CMS_sign_receipt - create a CMS signed receipt

       This functions behaves in a similar way to CMS_sign() except the flag values CMS_DETACHED, CMS_BINARY,
       CMS_NOATTR, CMS_TEXT and CMS_STREAM are not supported since they do not make sense in the context of
       signed receipts.

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).

ERR_get_error(3), CMS_verify_receipt(3), CMS_sign(3)

        #include <openssl/cms.h>

        CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si, X509 *signcert,
                                          EVP_PKEY *pkey, STACK_OF(X509) *certs,
                                          unsigned int flags);