NAME
d2i_ASN1_OBJECT,
i2d_ASN1_OBJECT —
decode and encode ASN.1 object
identifiers
SYNOPSIS
#include
<openssl/asn1.h>
ASN1_OBJECT *
d2i_ASN1_OBJECT(ASN1_OBJECT
**val_out, unsigned char **der_in,
long length);
int
i2d_ASN1_OBJECT(const ASN1_OBJECT
*val_in, unsigned char **der_out);
DESCRIPTION
These functions decode and encode ASN.1 object identifiers. For details about the semantics, examples, caveats, and bugs, see ASN1_item_d2i(3).
The objects returned from
d2i_ASN1_OBJECT()
and the data contained in them are always marked as dynamically allocated,
so when they are no longer needed,
ASN1_OBJECT_free(3) can be called on them.
If reusing an existing object is attempted
but the *val_out passed in points to an object that is
not marked as dynamically allocated, then the existing object is left
untouched and
d2i_ASN1_OBJECT()
behaves as if *val_out would have been
NULL: A new object is allocated and a pointer to it
is both stored in *val_out and returned.
RETURN VALUES
d2i_ASN1_OBJECT() returns an
ASN1_OBJECT object or NULL if
an error occurs.
i2d_ASN1_OBJECT() returns the number of
bytes successfully encoded or a value <= 0 if an error occurs.
SEE ALSO
HISTORY
d2i_ASN1_OBJECT() and
i2d_ASN1_OBJECT() first appeared in SSLeay 0.5.1 and
have been available since OpenBSD 2.4.
CAVEATS
d2i_ASN1_OBJECT() never sets the long and
short names of the object, not even if the object identifier matches one
that is built into the library. To find the names of an object identifier
parsed from DER or BER input, call
OBJ_obj2nid(3) on the returned object, and then
OBJ_nid2sn(3) and
OBJ_nid2ln(3) on the result.
BUGS
When reusing a dynamically allocated object that contains dynamically allocated names, the old names are not freed and the memory containing them is leaked.