NAME
ober_set_header,
ober_calc_len,
ober_set_writecallback,
ober_link_elements,
ober_replace_elements,
ober_dup,
ober_unlink_elements,
ober_free_element,
ober_free_elements —
change and destroy ASN.1 objects for
BER encoding
SYNOPSIS
#include
<sys/types.h>
#include <ber.h>
void
ober_set_header(struct
ber_element *elm, int
class, unsigned int
type);
size_t
ober_calc_len(struct
ber_element *root);
void
ober_set_writecallback(struct
ber_element *elm, void (*cb)(void *arg, size_t
offs), void *arg);
void
ober_link_elements(struct
ber_element *prev, struct
ber_element *elm);
void
ober_replace_elements(struct
ber_element *prev, struct
ber_element *elm);
struct ber_element *
ober_dup(struct
ber_element *orig);
struct ber_element *
ober_unlink_elements(struct
ber_element *prev);
void
ober_free_element(struct
ber_element *root);
void
ober_free_elements(struct
ber_element *root);
#define BER_TYPE_BOOLEAN 1
#define BER_TYPE_INTEGER 2
#define BER_TYPE_BITSTRING 3
#define BER_TYPE_OCTETSTRING 4
#define BER_TYPE_NULL 5
#define BER_TYPE_OBJECT 6
#define BER_TYPE_ENUMERATED 10
#define BER_TYPE_SEQUENCE 16
#define BER_TYPE_SET 17
#define BER_TYPE_CONSTRUCTED 0x20
#define BER_CLASS_UNIVERSAL 0x0
#define BER_CLASS_UNIV BER_CLASS_UNIVERSAL
#define BER_CLASS_APPLICATION 0x1
#define BER_CLASS_APP BER_CLASS_APPLICATION
#define BER_CLASS_CONTEXT 0x2
#define BER_CLASS_PRIVATE 0x3
DESCRIPTION
ober_set_header()
sets the class and type of
elm.
ober_calc_len()
determines the total length of root.
ober_set_writecallback()
registers the br_cb callback function.
ober_link_elements()
links prev and elm.
ober_replace_elements()
replaces prev with new and frees
any dynamically allocated storage associated with
prev.
ober_dup()
duplicates an element and all linked elements.
ober_unlink_elements()
unlinks prev.
ober_free_element()
and
ober_free_elements()
free any dynamically allocated storage associated with
root.
RETURN VALUES
ober_calc_len() returns the total length
of a fully populated root containing one or more
ber_element.
ober_dup() returns a pointer to the
duplicated element or NULL on error.
ober_unlink_elements() returns a pointer
to ber_element.
SEE ALSO
ober_add_string(3), ober_get_string(3), ober_oid_cmp(3), ober_read_elements(3)
STANDARDS
ITU-T Recommendation X.690, also known as ISO/IEC 8825-1: Information technology - ASN.1 encoding rules.
HISTORY
ober_dup() first appeared in
OpenBSD 7.0.
The other functions first appeared as internal functions in snmpd(8) in OpenBSD 4.2 and were moved to libutil in OpenBSD 6.6.
AUTHORS
The BER library was written by Claudio Jeker <claudio@openbsd.org>, Marc Balmer <marc@openbsd.org> and Reyk Floeter <reyk@openbsd.org>.