1=pod 2 3=head1 NAME 4 5CMS_uncompress - uncompress a CMS CompressedData structure 6 7=head1 SYNOPSIS 8 9 #include <openssl/cms.h> 10 11 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags); 12 13=head1 DESCRIPTION 14 15CMS_uncompress() extracts and uncompresses the content from a CMS 16CompressedData structure B<cms>. B<data> is a BIO to write the content to and 17B<flags> is an optional set of flags. 18 19The B<dcont> parameter is used in the rare case where the compressed content 20is detached. It will normally be set to NULL. 21 22=head1 NOTES 23 24The only currently supported compression algorithm is zlib: if the structure 25indicates the use of any other algorithm an error is returned. 26 27If zlib support is not compiled into OpenSSL then CMS_uncompress() will always 28return an error. 29 30The following flags can be passed in the B<flags> parameter. 31 32If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are deleted 33from the content. If the content is not of type B<text/plain> then an error is 34returned. 35 36=head1 RETURN VALUES 37 38CMS_uncompress() returns either 1 for success or 0 for failure. The error can 39be obtained from ERR_get_error(3) 40 41=head1 BUGS 42 43The lack of single pass processing and the need to hold all data in memory as 44mentioned in CMS_verify() also applies to CMS_decompress(). 45 46=head1 SEE ALSO 47 48L<ERR_get_error(3)>, L<CMS_compress(3)> 49 50=head1 COPYRIGHT 51 52Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved. 53 54Licensed under the Apache License 2.0 (the "License"). You may not use 55this file except in compliance with the License. You can obtain a copy 56in the file LICENSE in the source distribution or at 57L<https://www.openssl.org/source/license.html>. 58 59=cut 60