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Title "CMS_uncompress 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
.Vb 1 CMS_uncompress - uncompress a CMS CompressedData structure .Ve Header "SYNOPSIS" .Vb 1 #include <openssl/cms.h> \& int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags); .Ve Header "DESCRIPTION" \fICMS_uncompress() extracts and uncompresses the content from a \s-1CMS\s0 CompressedData structure cms. data is a \s-1BIO\s0 to write the content to and \fBflags 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 \s-1NULL.\s0

Header "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 \s-1CMS_TEXT\s0 flag is set \s-1MIME\s0 headers for type text/plain are deleted from the content. If the content is not of type text/plain then an error is returned.

Header "RETURN VALUES" \fICMS_uncompress() returns either 1 for success or 0 for failure. The error can be obtained from ERR_get_error\|(3) Header "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(). Header "SEE ALSO" \fIERR_get_error\|(3), CMS_compress\|(3) Header "HISTORY" \fICMS_uncompress() was added to OpenSSL 0.9.8