CMS_verify_receipt - verify a CMS signed receipt
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)
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