CMS_uncompress(3) OpenSSL CMS_uncompress(3)NAMECMS_uncompress - uncompress a CMS CompressedData structure
int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags);
DESCRIPTIONCMS_uncompress() extracts and uncompresses the content from a CMS Com‐
pressedData 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 con‐
tent is detached. It will normally be set to NULL.
The only currently supported compression algorithm is zlib: if the
structure indicates the use of any other algorithm an error is
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 VALUESCMS_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().
SEE ALSOERR_get_error(3), CMS_compress(3)HISTORYCMS_uncompress() was added to OpenSSL 0.9.8
1.0.0h 2008-04-12 CMS_uncompress(3)