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137 .IX Title "CMS_uncompress 3"
138 .TH CMS_uncompress 3 "2009-07-19" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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145 \& CMS_uncompress \- uncompress a CMS CompressedData structure
150 .IX Header "SYNOPSIS"
152 \& #include <openssl/cms.h>
154 \& int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags);
157 .IX Header "DESCRIPTION"
158 \&\fICMS_uncompress()\fR extracts and uncompresses the content from a \s-1CMS\s0
159 CompressedData structure \fBcms\fR. \fBdata\fR is a \s-1BIO\s0 to write the content to and
160 \&\fBflags\fR is an optional set of flags.
162 The \fBdcont\fR parameter is used in the rare case where the compressed content
163 is detached. It will normally be set to \s-1NULL.\s0
166 The only currently supported compression algorithm is zlib: if the structure
167 indicates the use of any other algorithm an error is returned.
169 If zlib support is not compiled into OpenSSL then \fICMS_uncompress()\fR will always
172 The following flags can be passed in the \fBflags\fR parameter.
174 If the \fB\s-1CMS_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR are deleted
175 from the content. If the content is not of type \fBtext/plain\fR then an error is
178 .IX Header "RETURN VALUES"
179 \&\fICMS_uncompress()\fR returns either 1 for success or 0 for failure. The error can
180 be obtained from \fIERR_get_error\fR\|(3)
183 The lack of single pass processing and the need to hold all data in memory as
184 mentioned in \fICMS_verify()\fR also applies to \fICMS_decompress()\fR.
186 .IX Header "SEE ALSO"
187 \&\fIERR_get_error\fR\|(3), \fICMS_compress\fR\|(3)
190 \&\fICMS_uncompress()\fR was added to OpenSSL 0.9.8