NAME
X509v3_get_ext_count,
X509v3_get_ext,
X509v3_get_ext_by_NID,
X509v3_get_ext_by_OBJ,
X509v3_get_ext_by_critical,
X509v3_delete_ext,
X509v3_add_ext,
X509_get_ext_count,
X509_get_ext,
X509_get_ext_by_NID,
X509_get_ext_by_OBJ,
X509_get_ext_by_critical,
X509_delete_ext,
X509_add_ext,
X509_CRL_get_ext_count,
X509_CRL_get_ext,
X509_CRL_get_ext_by_NID,
X509_CRL_get_ext_by_OBJ,
X509_CRL_get_ext_by_critical,
X509_CRL_delete_ext,
X509_CRL_add_ext,
X509_REVOKED_get_ext_count,
X509_REVOKED_get_ext,
X509_REVOKED_get_ext_by_NID,
X509_REVOKED_get_ext_by_OBJ,
X509_REVOKED_get_ext_by_critical,
X509_REVOKED_delete_ext,
X509_REVOKED_add_ext —
extension stack utility
functions
SYNOPSIS
#include
<openssl/x509.h>
int
X509v3_get_ext_count(const
STACK_OF(X509_EXTENSION) *x);
X509_EXTENSION *
X509v3_get_ext(const
STACK_OF(X509_EXTENSION) *x, int loc);
int
X509v3_get_ext_by_NID(const
STACK_OF(X509_EXTENSION) *x, int nid,
int lastpos);
int
X509v3_get_ext_by_OBJ(const
STACK_OF(X509_EXTENSION) *x, ASN1_OBJECT *obj,
int lastpos);
int
X509v3_get_ext_by_critical(const
STACK_OF(X509_EXTENSION) *x, int crit,
int lastpos);
X509_EXTENSION *
X509v3_delete_ext(STACK_OF(X509_EXTENSION)
*x, int loc);
STACK_OF(X509_EXTENSION) *
X509v3_add_ext(STACK_OF(X509_EXTENSION)
**x, X509_EXTENSION *ex, int
loc);
int
X509_get_ext_count(X509 *x);
X509_EXTENSION *
X509_get_ext(X509 *x,
int loc);
int
X509_get_ext_by_NID(X509 *x,
int nid, int lastpos);
int
X509_get_ext_by_OBJ(X509 *x,
ASN1_OBJECT *obj, int
lastpos);
int
X509_get_ext_by_critical(X509
*x, int crit, int
lastpos);
X509_EXTENSION *
X509_delete_ext(X509 *x,
int loc);
int
X509_add_ext(X509 *x,
X509_EXTENSION *ex, int
loc);
int
X509_CRL_get_ext_count(X509_CRL
*x);
X509_EXTENSION *
X509_CRL_get_ext(X509_CRL *x,
int loc);
int
X509_CRL_get_ext_by_NID(X509_CRL
*x, int nid, int
lastpos);
int
X509_CRL_get_ext_by_OBJ(X509_CRL
*x, ASN1_OBJECT *obj, int
lastpos);
int
X509_CRL_get_ext_by_critical(X509_CRL
*x, int crit, int
lastpos);
X509_EXTENSION *
X509_CRL_delete_ext(X509_CRL *x,
int loc);
int
X509_CRL_add_ext(X509_CRL *x,
X509_EXTENSION *ex, int
loc);
int
X509_REVOKED_get_ext_count(X509_REVOKED
*x);
X509_EXTENSION *
X509_REVOKED_get_ext(X509_REVOKED
*x, int loc);
int
X509_REVOKED_get_ext_by_NID(X509_REVOKED
*x, int nid, int
lastpos);
int
X509_REVOKED_get_ext_by_OBJ(X509_REVOKED
*x, ASN1_OBJECT *obj, int
lastpos);
int
X509_REVOKED_get_ext_by_critical(X509_REVOKED
*x, int crit, int
lastpos);
X509_EXTENSION *
X509_REVOKED_delete_ext(X509_REVOKED
*x, int loc);
int
X509_REVOKED_add_ext(X509_REVOKED
*x, X509_EXTENSION *ex, int
loc);
DESCRIPTION
X509v3_get_ext_count()
retrieves the number of extensions in x.
X509v3_get_ext()
retrieves extension loc from x.
The index loc can take any value from 0 to
X509_get_ext_count(x)
- 1. The returned extension is an internal pointer
which must not be freed up by the application.
X509v3_get_ext_by_NID()
and
X509v3_get_ext_by_OBJ()
look for an extension with nid or
obj from extension stack x. The
search starts from the extension after lastpos or from
the beginning if lastpos is -1. If the extension is
found, its index is returned; otherwise, -1 is returned.
X509v3_get_ext_by_critical()
is similar to X509v3_get_ext_by_NID() except that it
looks for an extension of criticality crit. A zero
value for crit looks for a non-critical extension; a
non-zero value looks for a critical extension.
X509v3_delete_ext()
deletes the extension with index loc from
x. The deleted extension is returned and must be freed
by the caller. If loc is an invalid index value,
NULL is returned.
X509v3_add_ext(3) adds the extension ex
to the stack *x at position loc.
If loc is -1, the new extension is added to the end.
If *x is NULL, a new stack
will be allocated. The passed extension ex is
duplicated internally so it must be freed after use.
X509_get_ext_count(),
X509_get_ext(),
X509_get_ext_by_NID(),
X509_get_ext_by_OBJ(),
X509_get_ext_by_critical(),
X509_delete_ext(),
and
X509_add_ext()
operate on the extensions of certificate x. They are
otherwise identical to the X509v3 functions.
X509_CRL_get_ext_count(),
X509_CRL_get_ext(),
X509_CRL_get_ext_by_NID(),
X509_CRL_get_ext_by_OBJ(),
X509_CRL_get_ext_by_critical(),
X509_CRL_delete_ext(),
and
X509_CRL_add_ext()
operate on the extensions of the CRL x. They are
otherwise identical to the X509v3 functions.
X509_REVOKED_get_ext_count(),
X509_REVOKED_get_ext(),
X509_REVOKED_get_ext_by_NID(),
X509_REVOKED_get_ext_by_OBJ(),
X509_REVOKED_get_ext_by_critical(),
X509_REVOKED_delete_ext(),
and
X509_REVOKED_add_ext()
operate on the extensions of the CRL entry x. They are
otherwise identical to the X509v3 functions.
These functions are used to examine stacks of extensions directly. Many applications will want to parse or encode and add an extension: they should use the extension encode and decode functions instead such as X509_get_ext_d2i(3).
Extension indices start from zero, so a zero index return value is not an error. These search functions start from the extension after the lastpos parameter, so it should initially be set to -1. If it is set to 0, the initial extension will not be checked.
RETURN VALUES
X509v3_get_ext_count() returns the
extension count.
X509v3_get_ext() and
X509v3_delete_ext() return an
X509_EXTENSION pointer or NULL
if an error occurs.
X509v3_get_ext_by_NID(),
X509v3_get_ext_by_OBJ(), and
X509v3_get_ext_by_critical() return the extension
index or -1 if an error occurs.
X509v3_add_ext(3) returns a stack of extensions or
NULL on error.