55 lines
1.4 KiB
Plaintext
55 lines
1.4 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
CMS_uncompress - uncompress a CMS CompressedData structure
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/cms.h>
|
|
|
|
int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
CMS_uncompress() extracts and uncompresses the content from a CMS
|
|
CompressedData structure B<cms>. B<data> is a BIO to write the content to and
|
|
B<flags> is an optional set of flags.
|
|
|
|
The B<dcont> parameter is used in the rare case where the compressed content
|
|
is detached. It will normally be set to NULL.
|
|
|
|
=head1 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() will always
|
|
return an error.
|
|
|
|
The following flags can be passed in the B<flags> parameter.
|
|
|
|
If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are deleted
|
|
from the content. If the content is not of type B<text/plain> then an error is
|
|
returned.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
CMS_uncompress() returns either 1 for success or 0 for failure. The error can
|
|
be obtained from ERR_get_error(3)
|
|
|
|
=head1 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().
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_compress(3)|CMS_compress(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
CMS_uncompress() was added to OpenSSL 0.9.8
|
|
|
|
=cut
|