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/*
* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: syntax=c sts=4 sw=4
*
* ASN1_OBJECT manipulation functions from OBJ_obj2txt(3SSL).
*
* Pavel Shramov
* IMEC MSU
*/
%{
#include <openssl/objects.h>
%}
%apply Pointer NONNULL { ASN1_OBJECT * };
%apply Pointer NONNULL { const char * };
%rename(obj_nid2obj) OBJ_nid2obj;
extern ASN1_OBJECT * OBJ_nid2obj(int n);
%rename(obj_nid2ln) OBJ_nid2ln;
extern const char * OBJ_nid2ln(int n);
%rename(obj_nid2sn) OBJ_nid2sn;
extern const char * OBJ_nid2sn(int n);
%rename(obj_obj2nid) OBJ_obj2nid;
extern int OBJ_obj2nid(const ASN1_OBJECT *o);
%rename(obj_ln2nid) OBJ_ln2nid;
extern int OBJ_ln2nid(const char *ln);
%rename(obj_sn2nid) OBJ_sn2nid;
extern int OBJ_sn2nid(const char *sn);
%rename(obj_txt2nid) OBJ_txt2nid;
extern int OBJ_txt2nid(const char *s);
%rename(obj_txt2obj) OBJ_txt2obj;
extern ASN1_OBJECT * OBJ_txt2obj(const char *s, int no_name);
%rename(_obj_obj2txt) OBJ_obj2txt;
extern int OBJ_obj2txt(char *, int, const ASN1_OBJECT *, int);
%inline %{
/*
From the manpage for OBJ_obt2txt ():
BUGS
OBJ_obj2txt() is awkward and messy to use: it doesn’t follow the
convention of other OpenSSL functions where the buffer can be set
to NULL to determine the amount of data that should be written.
Instead buf must point to a valid buffer and buf_len should be set
to a positive value. A buffer length of 80 should be more than
enough to handle any OID encountered in practice.
The first call to OBJ_obj2txt () therefore passes a non-NULL dummy
buffer. This wart is reportedly removed in OpenSSL 0.9.8b, although
the manpage has not been updated.
OBJ_obj2txt always prints \0 at the end. But the return value
is the number of "good" bytes written. So memory is allocated for
len + 1 bytes but only len bytes are marshalled to python.
*/
PyObject *obj_obj2txt(const ASN1_OBJECT *obj, int no_name)
{
int len;
PyObject *ret;
char *buf;
char dummy[1];
len = OBJ_obj2txt(dummy, 1, obj, no_name);
if (len < 0) {
m2_PyErr_Msg(PyExc_RuntimeError);
return NULL;
} else if (len == 0) {
/* XXX: For OpenSSL prior to 0.9.8b.
Changes between 0.9.8a and 0.9.8b [04 May 2006]
...
*) Several fixes and enhancements to the OID generation code. The old code
sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
handle numbers larger than ULONG_MAX, truncated printing and had a
non standard OBJ_obj2txt() behaviour.
[Steve Henson]
*/
len = 80;
}
buf = PyMem_Malloc(len + 1);
len = OBJ_obj2txt(buf, len + 1, obj, no_name);
ret = PyBytes_FromStringAndSize(buf, len);
PyMem_Free(buf);
return ret;
}
%}
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