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.
NOTES
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.
RETURN VALUES
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).
