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NAMECMS_get0_type, CMS_set1_eContentType, CMS_get0_eContentType, CMS_get0_content - get and set CMS content types and content
SYNOPSIS#include <openssl/cms.h> const ASN1_OBJECT *CMS_get0_type(const CMS_ContentInfo *cms); int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid); const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms); ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms);
DESCRIPTIONCMS_get0_type() returns the content type of a CMS_ContentInfo structure as an ASN1_OBJECT pointer. An application can then decide how to process the CMS_ContentInfo structure based on this value. CMS_set1_eContentType() sets the embedded content type of a CMS_ContentInfo structure. It should be called with CMS functions (such as the CMS_sign manpage, the CMS_encrypt manpage) with the CMS_PARTIAL flag and before the structure is finalised, otherwise the results are undefined. ASN1_OBJECT *CMS_get0_eContentType() returns a pointer to the embedded content type. CMS_get0_content() returns a pointer to the ASN1_OCTET_STRING pointer containing the embedded content.
NOTESAs the 0 implies CMS_get0_type(), CMS_get0_eContentType() and CMS_get0_content() return internal pointers which should not be freed up. CMS_set1_eContentType() copies the supplied OID and it should be freed up after use. The ASN1_OBJECT values returned can be converted to an integer NID value using OBJ_obj2nid(). For the currently supported content types the following values are returned: NID_pkcs7_data NID_pkcs7_signed NID_pkcs7_digest NID_id_smime_ct_compressedData: NID_pkcs7_encrypted NID_pkcs7_enveloped The return value of CMS_get0_content() is a pointer to the ASN1_OCTET_STRING content pointer. That means that for example: ASN1_OCTET_STRING **pconf = CMS_get0_content(cms); *pconf could be NULL if there is no embedded content. Applications can access, modify or create the embedded content in a CMS_ContentInfo structure using this function. Applications usually will not need to modify the embedded content as it is normally set by higher level functions.
RETURN VALUESCMS_get0_type() and CMS_get0_eContentType() return an ASN1_OBJECT structure. CMS_set1_eContentType() returns 1 for success or 0 if an error occurred. The
error can be obtained from
SEE ALSOERR_get_error(3)
COPYRIGHTCopyright 2008-2019 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html. |
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