CMS_uncompress(3) OpenSSL CMS_uncompress(3) NAME 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(). SEE ALSO ERR_get_error(3), CMS_compress(3) HISTORY CMS_uncompress() was added to OpenSSL 0.9.8 1.0.2k 2017-01-26 CMS_uncompress(3)
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