CMS_UNCOMPRESS(3ossl) OpenSSL CMS_UNCOMPRESS(3ossl)
NAME
CMS_uncompress - uncompress a CMS CompressedData structure
SYNOPSIS
#include <openssl/cms.h>
int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags);
DESCRIPTION
CMS_uncompress(3) extracts and uncompresses the content from a CMS
CompressedData structure cms. data is a BIO to write the content to and
flags is an optional set of flags.
The dcont parameter is used in the rare case where the compressed
content is detached. It will normally be set to NULL.
NOTES
The only currently supported compression algorithm is zlib: if the
structure indicates the use of any other algorithm an error is
returned.
If zlib support is not compiled into OpenSSL then CMS_uncompress(3) will
always return an error.
The following flags can be passed in the flags parameter.
If the CMS_TEXT flag is set MIME headers for type text/plain are
deleted from the content. If the content is not of type text/plain then
an error is returned.
RETURN VALUES
CMS_uncompress(3) returns either 1 for success or 0 for failure. The
error can be obtained from ERR_get_error(3)
BUGS
The lack of single pass processing and the need to hold all data in
memory as mentioned in CMS_verify() also applies to CMS_decompress().
SEE ALSO
ERR_get_error(3), CMS_compress(3)
COPYRIGHT
Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 CMS_UNCOMPRESS(3ossl)
openssl 3.3.2 - Generated Sat Sep 7 14:26:45 CDT 2024