Edit File: CMS_uncompress.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" .Vb 1 \& CMS_uncompress \- uncompress a CMS CompressedData structure .Ve .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/cms.h> \& \& int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBCMS_uncompress()\fR extracts and uncompresses the content from a \s-1CMS\s0 CompressedData structure \fBcms\fR. \fBdata\fR is a \s-1BIO\s0 to write the content to and \&\fBflags\fR is an optional set of flags. .PP The \fBdcont\fR parameter is used in the rare case where the compressed content is detached. It will normally be set to \s-1NULL.\s0 .SH "NOTES" .IX Header "NOTES" The only currently supported compression algorithm is zlib: if the structure indicates the use of any other algorithm an error is returned. .PP If zlib support is not compiled into OpenSSL then \fBCMS_uncompress()\fR will always return an error. .PP The following flags can be passed in the \fBflags\fR parameter. .PP If the \fB\s-1CMS_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR are deleted from the content. If the content is not of type \fBtext/plain\fR then an error is returned. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBCMS_uncompress()\fR returns either 1 for success or 0 for failure. The error can be obtained from \fBERR_get_error\fR\|(3) .SH "BUGS" .IX Header "BUGS" The lack of single pass processing and the need to hold all data in memory as mentioned in \fBCMS_verify()\fR also applies to \fBCMS_decompress()\fR. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3), \fBCMS_compress\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBCMS_uncompress()\fR was added to OpenSSL 0.9.8