CMS_get0_type.3ssl

Langue: en

Version: 2008-04-10 (fedora - 01/12/10)

Section: 3 (Bibliothèques de fonctions)

NAME

  CMS_get0_type, CMS_set1_eContentType, CMS_get0_eContentType - get and set CMS content types
 
 

SYNOPSIS

  #include <openssl/cms.h>
 
  const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms);
  int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid);
  const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms);
 
 

DESCRIPTION

CMS_get0_type() returns the content type of a CMS_ContentInfo structure as and 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 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.

NOTES

As the 0 implies CMS_get0_type() and CMS_get0_eContentType() 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
 
 

RETURN VALUES

CMS_get0_type() and CMS_get0_eContentType() return and ASN1_OBJECT structure.

CMS_set1_eContentType() returns 1 for success or 0 if an error occurred. The error can be obtained from ERR_get_error(3).

SEE ALSO

ERR_get_error(3)

HISTORY

CMS_get0_type(), CMS_set1_eContentType() and CMS_get0_eContentType() were all first added to OpenSSL 0.9.8