.\" $OpenBSD: CMS_sign_receipt.3,v 1.7 2019/11/02 15:39:46 schwarze Exp $
.\" full merge up to: OpenSSL e9b77246 Jan 20 19:58:49 2017 +0100
.\"
.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
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.Dd $Mdocdate: November 2 2019 $
.Dt CMS_SIGN_RECEIPT 3
.Os
.Sh NAME
.Nm CMS_sign_receipt
.Nd create a CMS signed receipt
.Sh SYNOPSIS
.In openssl/cms.h
.Ft CMS_ContentInfo *
.Fo CMS_sign_receipt
.Fa "CMS_SignerInfo *si"
.Fa "X509 *signcert"
.Fa "EVP_PKEY *pkey"
.Fa "STACK_OF(X509) *certs"
.Fa "unsigned int flags"
.Fc
.Sh DESCRIPTION
.Fn CMS_sign_receipt
creates a new CMS
.Vt SignedData
structure containing a signed
.Vt Receipt
as its embedded content.
.Fa si
is the
.Vt SignerInfo
structure containing the signed receipt request.
.Fa signcert
is the certificate to sign with,
.Fa pkey
is the corresponding private key.
.Fa certs
is an optional additional set of certificates to include in the CMS
structure (for example any intermediate CAs in the chain).
.Pp
This functions behaves in a similar way to
.Xr CMS_sign 3
except that the
.Fa flags
values
.Dv CMS_DETACHED ,
.Dv CMS_BINARY ,
.Dv CMS_NOATTR ,
.Dv CMS_TEXT ,
and
.Dv CMS_STREAM
are not supported since they do not make sense in the context of
signed receipts.
.Sh RETURN VALUES
.Fn CMS_sign_receipt
returns either a valid
.Vt CMS_ContentInfo
structure or
.Dv NULL
if an error occurred.
The error can be obtained from
.Xr ERR_get_error 3 .
.Sh SEE ALSO
.Xr CMS_ContentInfo_new 3 ,
.Xr CMS_get1_ReceiptRequest 3 ,
.Xr CMS_sign 3 ,
.Xr CMS_verify_receipt 3
.Sh STANDARDS
RFC 2634: Enhanced Security Services for S/MIME, section 2.8: Receipt Syntax
.Sh HISTORY
.Fn CMS_sign_receipt
first appeared in OpenSSL 0.9.8h
and has been available since
.Ox 6.7 .