#include
ASN1_OBJECT * OBJ_nid2obj(int n); const char * OBJ_nid2ln(int n); const char * OBJ_nid2sn(int n);
int OBJ_obj2nid(const ASN1_OBJECT *o); int OBJ_ln2nid(const char *ln); int OBJ_sn2nid(const char *sn);
int OBJ_txt2nid(const char *s);
ASN1_OBJECT * OBJ_txt2obj(const char *s, int no_name); int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name);
int OBJ_cmp(const ASN1_OBJECT *a,const ASN1_OBJECT *b); ASN1_OBJECT * OBJ_dup(const ASN1_OBJECT *o);
int OBJ_create(const char *oid,const char *sn,const char *ln); void OBJ_cleanup(void);
_O_B_J___n_i_d_2_o_b_j_(_), _O_B_J___n_i_d_2_l_n_(_) and _O_B_J___n_i_d_2_s_n_(_) convert the NID nn to an ASN1_OBJECT structure, its long name and its short name respectively, or NNUULLLL is an error occurred.
_O_B_J___o_b_j_2_n_i_d_(_), _O_B_J___l_n_2_n_i_d_(_), _O_B_J___s_n_2_n_i_d_(_) return the corresponding NID
for the object oo, the long name
_O_B_J___t_x_t_2_n_i_d_(_) returns NID corresponding to text string
_O_B_J___t_x_t_2_o_b_j_(_) converts the text string ss into an ASN1_OBJECT structure.
If nnoo__nnaammee is 0 then long names and short names will be interpreted
as well as numerical forms. If nnoo__nnaammee is 1 only the numerical form
is acceptable.
_O_B_J___o_b_j_2_t_x_t_(_) converts the AASSNN11__OOBBJJEECCTT aa into a textual representation.
The representation is written as a null terminated string to bbuuff
at most bbuuff__lleenn bytes are written, truncating the result if necessary.
The total amount of space required is returned. If nnoo__nnaammee is 0 then
if the object has a long or short name then that will be used, otherwise
the numerical form will be used. If nnoo__nnaammee is 1 then the numerical
form will always be used.
_O_B_J___c_m_p_(_) compares aa to bb. If the two are identical 0 is returned.
_O_B_J___d_u_p_(_) returns a copy of oo.
_O_B_J___c_r_e_a_t_e_(_) adds a new object to the internal table. ooiidd is the
numerical form of the object, ssnn the short name and llnn the
long name. A new NID is returned for the created object.
_O_B_J___c_l_e_a_n_u_p_(_) cleans up OpenSSLs internal object table: this should
be called before an application exits if any new objects were added
using _O_B_J___c_r_e_a_t_e_(_).
For example the OID for commonName has the following definitions:
New objects can be added by calling _O_B_J___c_r_e_a_t_e_(_).
Table objects have certain advantages over other objects: for example
their NIDs can be used in a C language switch statement. They are
also static constant structures which are shared: that is there
is only a single constant structure for each table object.
Objects which are not in the table have the NID value NID_undef.
Objects do not need to be in the internal tables to be processed,
the functions _O_B_J___t_x_t_2_o_b_j_(_) and _O_B_J___o_b_j_2_t_x_t_(_) can process the numerical
form of an OID.
Check if an object is ccoommmmoonnNNaammee
Create a new NID and initialize an object from it:
Create a new object directly:
_O_B_J___n_i_d_2_l_n_(_) and _O_B_J___n_i_d_2_s_n_(_) returns a valid string or NNUULLLL
on error.
_O_B_J___o_b_j_2_n_i_d_(_), _O_B_J___l_n_2_n_i_d_(_), _O_B_J___s_n_2_n_i_d_(_) and _O_B_J___t_x_t_2_n_i_d_(_) return
a NID or NNIIDD__uunnddeeff on error.
. ss can be
a long name, a short name or the numerical respresentation of an object.
NOTES
Objects in OpenSSL can have a short name, a long name and a numerical
identifier (NID) associated with them. A standard set of objects is
represented in an internal table. The appropriate values are defined
in the header file oobbjjeeccttss..hh.
#define SN_commonName "CN"
#define LN_commonName "commonName"
#define NID_commonName 13
EXAMPLES
Create an object for ccoommmmoonnNNaammee:
ASN1_OBJECT *o;
o = OBJ_nid2obj(NID_commonName);
if (OBJ_obj2nid(obj) == NID_commonName)
/* Do something */
int new_nid;
ASN1_OBJECT *obj;
new_nid = OBJ_create("1.2.3.4", "NewOID", "New Object Identifier");
obj = OBJ_nid2obj(new_nid);
obj = OBJ_txt2obj("1.2.3.4", 1);
BUGS
_O_B_J___o_b_j_2_t_x_t_(_) is awkward and messy to use: it doesn't follow the
convention of other OpenSSL functions where the buffer can be set
to NNUULLLL to determine the amount of data that should be written.
Instead bbuuff must point to a valid buffer and bbuuff__lleenn should
be set to a positive value. A buffer length of 80 should be more
than enough to handle any OID encountered in practice.
RETURN VALUES
_O_B_J___n_i_d_2_o_b_j_(_) returns an AASSNN11__OOBBJJEECCTT structure or NNUULLLL is an
error occurred.
SEE ALSO
_E_R_R___g_e_t___e_r_r_o_r(3)
HISTORY
TBA