NAME
ASN1_OBJECT_new,
ASN1_OBJECT_create,
ASN1_OBJECT_free —
ASN.1 object identifiers
SYNOPSIS
#include
<openssl/asn1.h>
ASN1_OBJECT *
ASN1_OBJECT_new(void);
ASN1_OBJECT *
ASN1_OBJECT_create(int nid,
unsigned char *content, int len,
const char *short_name, const char
*long_name);
void
ASN1_OBJECT_free(ASN1_OBJECT
*a);
DESCRIPTION
ASN1_OBJECT_new()
allocates and initializes an empty ASN1_OBJECT object,
representing an ASN.1 OBJECT IDENTIFIER. It can hold a short name, a long
name, a numeric identifier (NID), and a sequence of integers identifying a
node in the International Object Identifier tree as specified in ITU-T
recommendation X.660. The new object is marked as dynamically allocated.
The ASN.1 object identifier type is also represented by the
V_ASN1_OBJECT type identifier constant.
ASN1_OBJECT_create()
allocates a new ASN1_OBJECT with the given
nid, copies the len DER
content octets, the short_name,
and the long_name into it, and marks the new object
and all data contained in it as dynamically allocated.
Application programs normally use utility
functions like
OBJ_nid2obj(3) rather than using
ASN1_OBJECT_new()
or ASN1_OBJECT_create() directly.
ASN1_OBJECT_free()
has the following effects:
All data contained in a that is marked as dynamically allocated is freed, and the respective fields of a become empty. Contained data not marked as dynamically allocated remains intact.
If the object a itself is marked as dynamically allocated, it is freed. Otherwise, the pointer a remains valid.
If a is a NULL
pointer or if neither the object itself nor any of its content is marked as
dynamically allocated, no action occurs.
RETURN VALUES
ASN1_OBJECT_new() and
ASN1_OBJECT_create() return a pointer to the new
object or NULL if memory allocation fails,
ERRORS
After failure of ASN1_OBJECT_new() or
ASN1_OBJECT_create(), the following diagnostic can
be retrieved with
ERR_get_error(3),
ERR_GET_REASON(3), and
ERR_reason_error_string(3):
ERR_R_MALLOC_FAILURE"malloc failure"- Memory allocation failed.
After some cases of failure of
ASN1_OBJECT_create(), the following diagnostic can
be retrieved in addition to the above:
ERR_R_ASN1_LIB"ASN1 lib"- Memory allocation failed.
SEE ALSO
a2d_ASN1_OBJECT(3), ASN1_TYPE_get(3), d2i_ASN1_OBJECT(3), OBJ_create(3), OBJ_nid2obj(3)
STANDARDS
ITU-T Recommendation X.208, also known as ISO/IEC 8824-1: Specification of Abstract Syntax Notation One (ASN.1), section 28: Notation for the object identifier type
ITU-T Recommendation X.690, also known as ISO/IEC 8825-1: Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER), section 8.19: Encoding of an object identifier value
HISTORY
ASN1_OBJECT_new() and
ASN1_OBJECT_free() first appeared in SSLeay 0.5.1
and ASN1_OBJECT_create() in SSLeay 0.8.0. These
functions have been available since OpenBSD 2.4.