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() 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()
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() 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().
