5 CMS_uncompress - uncompress a CMS CompressedData structure
9 #include <openssl/cms.h>
11 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags);
15 CMS_uncompress() extracts and uncompresses the content from a CMS
16 CompressedData structure B<cms>. B<data> is a BIO to write the content to and
17 B<flags> is an optional set of flags.
19 The B<dcont> parameter is used in the rare case where the compressed content
20 is detached. It will normally be set to NULL.
24 The only currently supported compression algorithm is zlib: if the structure
25 indicates the use of any other algorithm an error is returned.
27 If zlib support is not compiled into OpenSSL then CMS_uncompress() will always
30 The following flags can be passed in the B<flags> parameter.
32 If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are deleted
33 from the content. If the content is not of type B<text/plain> then an error is
38 CMS_uncompress() returns either 1 for success or 0 for failure. The error can
39 be obtained from ERR_get_error(3)
43 The lack of single pass processing and the need to hold all data in memory as
44 mentioned in CMS_verify() also applies to CMS_decompress().
48 L<ERR_get_error(3)>, L<CMS_compress(3)>
52 Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
54 Licensed under the OpenSSL license (the "License"). You may not use
55 this file except in compliance with the License. You can obtain a copy
56 in the file LICENSE in the source distribution or at
57 L<https://www.openssl.org/source/license.html>.