CMS_verify_receipt - verify a CMS signed receipt
 #include <openssl/cms.h>
 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
                        STACK_OF(X509) *certs, X509_STORE *store,
                        unsigned int flags);
CMS_verify_receipt() verifies a CMS signed receipt. rcms is the
  signed receipt to verify. ocms is the original SignedData structure
  containing the receipt request. certs is a set of certificates in which
  to search for the signing certificate. store is a trusted certificate
  store (used for chain verification).
flags is an optional set of flags, which can be used to
    modify the verify operation.
This functions behaves in a similar way to CMS_verify() except the flag
  values CMS_DETACHED, CMS_BINARY, CMS_TEXT and
  CMS_STREAM are not supported since they do not make sense in the
  context of signed receipts.
CMS_verify_receipt() returns 1 for a successful verification and zero if
  an error occurred.
The error can be obtained from ERR_get_error(3)
ERR_get_error(3), CMS_sign_receipt(3), CMS_verify(3),
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>.