SMIME_write_CMS - convert CMS structure to S/MIME format.
#include <openssl/cms.h> int SMIME_write_CMS(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags);
SMIME_write_CMS(3openssl) OpenSSL SMIME_write_CMS(3openssl)
NAME
SMIME_write_CMS - convert CMS structure to S/MIME format.
SYNOPSIS
#include <openssl/cms.h>
int SMIME_write_CMS(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags);
DESCRIPTION
SMIME_write_CMS() adds the appropriate MIME headers to a CMS structure
to produce an S/MIME message.
out is the BIO to write the data to. cms is the appropriate
CMS_ContentInfo structure. If streaming is enabled then the content
must be supplied in the data argument. flags is an optional set of
flags.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | library/security/openssl |
+---------------+--------------------------+
|Stability | Pass-through uncommitted |
+---------------+--------------------------+
NOTES
The following flags can be passed in the flags parameter.
If CMS_DETACHED is set then cleartext signing will be used, this option
only makes sense for SignedData where CMS_DETACHED is also set when
CMS_sign() is called.
If the CMS_TEXT flag is set MIME headers for type text/plain are added
to the content, this only makes sense if CMS_DETACHED is also set.
If the CMS_STREAM flag is set streaming is performed. This flag should
only be set if CMS_STREAM was also set in the previous call to a
CMS_ContentInfo creation function.
If cleartext signing is being used and CMS_STREAM not set then the data
must be read twice: once to compute the signature in CMS_sign() and
once to output the S/MIME message.
If streaming is performed the content is output in BER format using
indefinite length constructed encoding except in the case of signed
data with detached content where the content is absent and DER format
is used.
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://www.openssl.org/source/openssl-1.0.2ze.tar.gz.
Further information about this software can be found on the open source
community website at https://www.openssl.org/.
BUGS
SMIME_write_CMS() always base64 encodes CMS structures, there should be
an option to disable this.
RETURN VALUES
SMIME_write_CMS() returns 1 for success or 0 for failure.
SEE ALSO
ERR_get_error(3), CMS_sign(3), CMS_verify(3), CMS_encrypt(3)
CMS_decrypt(3)
HISTORY
SMIME_write_CMS() was added to OpenSSL 0.9.8
1.0.2ze 2022-05-03 SMIME_write_CMS(3openssl)