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135 .IX Title "CMS_get0_type 3"
136 .TH CMS_get0_type 3 "2016-09-26" "1.0.2j" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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143 \& CMS_get0_type, CMS_set1_eContentType, CMS_get0_eContentType, CMS_get0_content \- get and set CMS content types and content
146 .IX Header "SYNOPSIS"
148 \& #include <openssl/cms.h>
150 \& const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms);
151 \& int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid);
152 \& const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms);
153 \& ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms);
156 .IX Header "DESCRIPTION"
157 \&\fICMS_get0_type()\fR returns the content type of a CMS_ContentInfo structure as
158 and \s-1ASN1_OBJECT\s0 pointer. An application can then decide how to process the
159 CMS_ContentInfo structure based on this value.
161 \&\fICMS_set1_eContentType()\fR sets the embedded content type of a CMS_ContentInfo
162 structure. It should be called with \s-1CMS\s0 functions with the \fB\s-1CMS_PARTIAL\s0\fR
163 flag and \fBbefore\fR the structure is finalised, otherwise the results are
166 \&\s-1ASN1_OBJECT\s0 *\fICMS_get0_eContentType()\fR returns a pointer to the embedded
169 \&\fICMS_get0_content()\fR returns a pointer to the \fB\s-1ASN1_OCTET_STRING\s0\fR pointer
170 containing the embedded content.
173 As the \fB0\fR implies \fICMS_get0_type()\fR, \fICMS_get0_eContentType()\fR and
174 \&\fICMS_get0_content()\fR return internal pointers which should \fBnot\fR be freed up.
175 \&\fICMS_set1_eContentType()\fR copies the supplied \s-1OID\s0 and it \fBshould\fR be freed up
178 The \fB\s-1ASN1_OBJECT\s0\fR values returned can be converted to an integer \fB\s-1NID\s0\fR value
179 using \fIOBJ_obj2nid()\fR. For the currently supported content types the following
186 \& NID_id_smime_ct_compressedData:
187 \& NID_pkcs7_encrypted
188 \& NID_pkcs7_enveloped
191 The return value of \fICMS_get0_content()\fR is a pointer to the \fB\s-1ASN1_OCTET_STRING\s0\fR
192 content pointer. That means that for example:
195 \& ASN1_OCTET_STRING **pconf = CMS_get0_content(cms);
198 \&\fB*pconf\fR could be \s-1NULL\s0 if there is no embedded content. Applications can
199 access, modify or create the embedded content in a \fBCMS_ContentInfo\fR structure
200 using this function. Applications usually will not need to modify the
201 embedded content as it is normally set by higher level functions.
203 .IX Header "RETURN VALUES"
204 \&\fICMS_get0_type()\fR and \fICMS_get0_eContentType()\fR return and \s-1ASN1_OBJECT\s0 structure.
206 \&\fICMS_set1_eContentType()\fR returns 1 for success or 0 if an error occurred. The
207 error can be obtained from \fIERR_get_error\fR\|(3).
209 .IX Header "SEE ALSO"
210 \&\fIERR_get_error\fR\|(3)
213 \&\fICMS_get0_type()\fR, \fICMS_set1_eContentType()\fR and \fICMS_get0_eContentType()\fR were all
214 first added to OpenSSL 0.9.8