| CMS_uncompress - uncompress a CMS CompressedData structure |
| int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags); |
| 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. |
| 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 |
| 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 |
| CMS_uncompress() returns either 1 for success or 0 for failure. The error can |
| be obtained from ERR_get_error(3) |
| 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(). |
| L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_compress(3)|CMS_compress(3)> |
| CMS_uncompress() was added to OpenSSL 0.9.8 |
