verify a CMS signed receipt
*rcms, CMS_ContentInfo *ocms,
STACK_OF(X509) *certs, X509_STORE
*store, unsigned int flags);
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).
This functions behaves in a similar way to
CMS_verify(3) except that the flags values
not supported since they do not make sense in the context of signed
CMS_verify_receipt() returns 1 for a
successful verification or 0 if an error occurred.
The error can be obtained from ERR_get_error(3).
CMS_ContentInfo_new(3), CMS_get1_ReceiptRequest(3), CMS_sign_receipt(3), CMS_verify(3)
RFC 2634: Enhanced Security Services for S/MIME, section 2.8: Receipt Syntax
CMS_verify_receipt() first appeared in
OpenSSL 0.9.8h and has been available since OpenBSD