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Comparing Convert-BER-XS/XS.xs (file contents):
Revision 1.2 by root, Fri Apr 19 16:49:02 2019 UTC vs.
Revision 1.26 by root, Sun Apr 21 10:42:22 2019 UTC

1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	// C99 required	5	// C99 required!
		6	// this is not just for comments, but also for
		7	// integer constant semantics,
		8	// sscanf format modifiers and more.
6		9
7	enum {	10	enum {
8	// ASN_TAG	11	// ASN_TAG
9	ASN_BOOLEAN = 0x01,	12	ASN_BOOLEAN = 0x01,
10	ASN_INTEGER32 = 0x02,	13	ASN_INTEGER = 0x02,
11	ASN_BIT_STRING = 0x03,	14	ASN_BIT_STRING = 0x03,
12	ASN_OCTET_STRING = 0x04,	15	ASN_OCTET_STRING = 0x04,
13	ASN_NULL = 0x05,	16	ASN_NULL = 0x05,
14	ASN_OBJECT_IDENTIFIER = 0x06,	17	ASN_OBJECT_IDENTIFIER = 0x06,
		18	ASN_OID = 0x06,
		19	ASN_OBJECT_DESCRIPTOR = 0x07,
		20	ASN_EXTERNAL = 0x08,
15	ASN_REAL = 0x09, //X	21	ASN_REAL = 0x09,
16	ASN_ENUMERATED = 0x0a, //X	22	ASN_ENUMERATED = 0x0a,
		23	ASN_EMBEDDED_PDV = 0x0b,
		24	ASN_UTF8_STRING = 0x0c,
		25	ASN_RELATIVE_OID = 0x0d,
17	ASN_SEQUENCE = 0x10,	26	ASN_SEQUENCE = 0x10,
18	ASN_SET = 0x11, //X	27	ASN_SET = 0x11,
		28	ASN_NUMERIC_STRING = 0x12,
		29	ASN_PRINTABLE_STRING = 0x13,
		30	ASN_TELETEX_STRING = 0x14,
		31	ASN_T61_STRING = 0x14,
		32	ASN_VIDEOTEX_STRING = 0x15,
		33	ASN_IA5_STRING = 0x16,
		34	ASN_ASCII_STRING = 0x16,
19	ASN_UTC_TIME = 0x17, //X	35	ASN_UTC_TIME = 0x17,
20	ASN_GENERAL_TIME = 0x18, //X	36	ASN_GENERALIZED_TIME = 0x18,
		37	ASN_GRAPHIC_STRING = 0x19,
		38	ASN_VISIBLE_STRING = 0x1a,
		39	ASN_ISO646_STRING = 0x1a,
		40	ASN_GENERAL_STRING = 0x1b,
		41	ASN_UNIVERSAL_STRING = 0x1c,
		42	ASN_CHARACTER_STRING = 0x1d,
		43	ASN_BMP_STRING = 0x1e,
21		44
22	ASN_TAG_BER = 0x1f,	45	ASN_TAG_BER = 0x1f,
23	ASN_TAG_MASK = 0x1f,	46	ASN_TAG_MASK = 0x1f,
24		47
25	// primitive/constructed	48	// primitive/constructed
26	ASN_CONSTRUCTED = 0x20,	49	ASN_CONSTRUCTED = 0x20,
27		50
28	// ASN_CLASS	51	// ASN_CLASS
29	ASN_UNIVERSAL = 0x00,	52	ASN_UNIVERSAL = 0x00,
30	ASN_APPLICATION = 0x40,	53	ASN_APPLICATION = 0x01,
31	ASN_CONTEXT = 0x80,	54	ASN_CONTEXT = 0x02,
32	ASN_PRIVATE = 0xc0,	55	ASN_PRIVATE = 0x03,
33		56
34	ASN_CLASS_MASK = 0xc0,	57	ASN_CLASS_MASK = 0xc0,
35	ASN_CLASS_SHIFT = 6,	58	ASN_CLASS_SHIFT = 6,
36		59
37	// ASN_APPLICATION SNMP	60	// ASN_APPLICATION SNMP
38	ASN_IPADDRESS = 0x00,	61	SNMP_IPADDRESS = 0x00,
39	ASN_COUNTER32 = 0x01,	62	SNMP_COUNTER32 = 0x01,
		63	SNMP_GAUGE32 = 0x02,
40	ASN_UNSIGNED32 = 0x02,	64	SNMP_UNSIGNED32 = 0x02,
41	ASN_TIMETICKS = 0x03,	65	SNMP_TIMETICKS = 0x03,
42	ASN_OPAQUE = 0x04,	66	SNMP_OPAQUE = 0x04,
43	ASN_COUNTER64 = 0x06,	67	SNMP_COUNTER64 = 0x06,
44	};	68	};
45		69
46	enum {	70	enum {
		71	BER_TYPE_BYTES,
		72	BER_TYPE_UTF8,
		73	BER_TYPE_UCS2,
		74	BER_TYPE_UCS4,
		75	BER_TYPE_INT,
		76	BER_TYPE_OID,
		77	BER_TYPE_RELOID,
		78	BER_TYPE_NULL,
		79	BER_TYPE_BOOL,
		80	BER_TYPE_REAL,
		81	BER_TYPE_IPADDRESS,
		82	BER_TYPE_CROAK,
		83	};
		84
		85	enum {
47	BER_CLASS = 0,	86	BER_CLASS = 0,
48	BER_TAG = 1,	87	BER_TAG = 1,
49	BER_CONSTRUCTED = 2,	88	BER_FLAGS = 2,
50	BER_DATA = 3,	89	BER_DATA = 3,
51	BER_ARRAYSIZE	90	BER_ARRAYSIZE
52	};	91	};
53		92
54	#define MAX_OID_STRLEN 4096	93	#define MAX_OID_STRLEN 4096
55		94
56	static U8 *buf, *cur;	95	typedef void profile_type;
57	static STRLEN len, rem;	96
		97	static profile_type *cur_profile, *default_profile;
		98	static SV *buf_sv; // encoding buffer
		99	static U8 *buf, *cur, *end; // buffer start, current, end
		100
		101	#if PERL_VERSION < 18
		102	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
		103	#endif
		104
		105	#if __GNUC__ >= 3
		106	# define expect(expr,value) __builtin_expect ((expr), (value))
		107	# define INLINE static inline
		108	#else
		109	# define expect(expr,value) (expr)
		110	# define INLINE static
		111	#endif
		112
		113	#define expect_false(expr) expect ((expr) != 0, 0)
		114	#define expect_true(expr) expect ((expr) != 0, 1)
		115
		116	/////////////////////////////////////////////////////////////////////////////
		117
		118	static SV *sviv_cache[32];
58		119
59	// for "small" integers, return a readonly sv, otherwise create a new one	120	// for "small" integers, return a readonly sv, otherwise create a new one
60	static SV *newSVcacheint (int val)	121	static SV *newSVcacheint (int val)
61	{	122	{
62	static SV *cache[32];
63
64	if (val < 0 || val >= sizeof (cache))	123	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
65	return newSViv (val);	124	return newSViv (val);
66		125
67	if (!cache [val])	126	if (expect_false (!sviv_cache [val]))
68	{	127	{
69	cache [val] = newSVuv (val);	128	sviv_cache [val] = newSVuv (val);
70	SvREADONLY_on (cache [val]);	129	SvREADONLY_on (sviv_cache [val]);
71	}	130	}
72		131
73	return SvREFCNT_inc_NN (cache [val]);	132	return SvREFCNT_inc_NN (sviv_cache [val]);
74	}	133	}
75		134
76	/////////////////////////////////////////////////////////////////////////////	135	/////////////////////////////////////////////////////////////////////////////
77		136
		137	static HV *profile_stash;
		138
		139	static profile_type *
		140	SvPROFILE (SV *profile)
		141	{
		142	if (!SvOK (profile))
		143	return default_profile;
		144
		145	if (!SvROK (profile))
		146	croak ("Convert::BER::XS::Profile expected");
		147
		148	profile = SvRV (profile);
		149
		150	if (SvSTASH (profile) != profile_stash)
		151	croak ("Convert::BER::XS::Profile expected");
		152
		153	return (void *)profile;
		154	}
		155
		156	static int
		157	profile_lookup (profile_type *profile, int klass, int tag)
		158	{
		159	SV *sv = (SV *)profile;
		160	U32 idx = (tag << 2) + klass;
		161
		162	if (expect_false (idx >= SvCUR (sv)))
		163	return BER_TYPE_BYTES;
		164
		165	return SvPVX (sv)[idx];
		166	}
		167
		168	static void
		169	profile_set (profile_type *profile, int klass, int tag, int type)
		170	{
		171	SV *sv = (SV *)profile;
		172	U32 idx = (tag << 2) + klass;
		173	STRLEN oldlen = SvCUR (sv);
		174	STRLEN newlen = idx + 2;
		175
		176	if (idx >= oldlen)
		177	{
		178	sv_grow (sv, newlen);
		179	memset (SvPVX (sv) + oldlen, BER_TYPE_BYTES, newlen - oldlen);
		180	SvCUR_set (sv, newlen);
		181	}
		182
		183	SvPVX (sv)[idx] = type;
		184	}
		185
		186	static SV *
		187	profile_new (void)
		188	{
		189	SV *sv = newSVpvn ("", 0);
		190
		191	static const struct {
		192	int klass;
		193	int tag;
		194	int type;
		195	} *celem, default_map[] = {
		196	{ ASN_UNIVERSAL, ASN_BOOLEAN , BER_TYPE_BOOL },
		197	{ ASN_UNIVERSAL, ASN_INTEGER , BER_TYPE_INT },
		198	{ ASN_UNIVERSAL, ASN_NULL , BER_TYPE_NULL },
		199	{ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, BER_TYPE_OID },
		200	{ ASN_UNIVERSAL, ASN_RELATIVE_OID , BER_TYPE_RELOID },
		201	{ ASN_UNIVERSAL, ASN_REAL , BER_TYPE_REAL },
		202	{ ASN_UNIVERSAL, ASN_ENUMERATED , BER_TYPE_INT },
		203	{ ASN_UNIVERSAL, ASN_UTF8_STRING , BER_TYPE_UTF8 },
		204	{ ASN_UNIVERSAL, ASN_BMP_STRING , BER_TYPE_UCS2 },
		205	{ ASN_UNIVERSAL, ASN_UNIVERSAL_STRING , BER_TYPE_UCS4 },
		206	};
		207
		208	for (celem = default_map + sizeof (default_map) / sizeof (default_map [0]); celem-- > default_map; )
		209	profile_set ((profile_type *)sv, celem->klass, celem->tag, celem->type);
		210
		211	return sv_bless (newRV_noinc (sv), profile_stash);
		212	}
		213
		214	/////////////////////////////////////////////////////////////////////////////
		215	// decoder
		216
78	static void	217	static void
79	error (const char *errmsg)	218	error (const char *errmsg)
80	{	219	{
81	croak ("%s at offset 0x%04x", errmsg, cur - buf);	220	croak ("%s at offset 0x%04x", errmsg, cur - buf);
82	}	221	}
83		222
84	static int	223	static void
85	need (int count)	224	want (UV count)
86	{	225	{
87	if (count < 0 || (int)rem < count)	226	if (expect_false ((uintptr_t)(end - cur) < count))
88	{
89	error ("unexpected end of message buffer");	227	error ("unexpected end of message buffer");
90	return 0;
91	}
92
93	return 1;
94	}	228	}
95		229
96	// get_* functions fetch something from the buffer	230	// get_* functions fetch something from the buffer
97	// decode_* functions use get_* fun ctions to decode ber values	231	// decode_* functions use get_* fun ctions to decode ber values
98		232
99	static U8 *	233	// get single octet
100	get_n (int count, const U8 *errres)
101	{
102	if (!need (count))
103	return (U8 *)errres;
104
105	U8 *res = cur;
106
107	cur += count;
108	rem -= count;
109
110	return res;
111	}
112
113	static U8	234	static U8
114	get_u8 (void)	235	get_u8 (void)
115	{	236	{
116	if (rem <= 0)	237	if (cur == end)
117	{
118	error ("unexpected end of message buffer");	238	error ("unexpected end of message buffer");
119	return 0;
120	}
121		239
122	rem--;
123	return *cur++;	240	return *cur++;
124	}	241	}
125		242
		243	// get n octets
		244	static U8 *
		245	get_n (UV count)
		246	{
		247	want (count);
		248	U8 *res = cur;
		249	cur += count;
		250	return res;
		251	}
		252
		253	// get ber-encoded integer (i.e. pack "w")
126	static U32	254	static UV
127	get_ber (void)	255	get_w (void)
128	{	256	{
129	U32 res = 0;	257	UV res = 0;
		258	U8 c = get_u8 ();
		259
		260	if (expect_false (c == 0x80))
		261	error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)");
130		262
131	for (;;)	263	for (;;)
132	{	264	{
133	U8 c = get_u8 ();	265	if (expect_false (res >> UVSIZE * 8 - 7))
		266	error ("BER variable length integer overflow");
		267
134	res = (res << 7) | (c & 0x7f);	268	res = (res << 7) | (c & 0x7f);
135		269
136	if (!(c & 0x80))	270	if (!(c & 0x80))
137	return res;	271	return res;
138	}
139	}
140		272
		273	c = get_u8 ();
		274	}
		275	}
		276
141	static U32	277	static UV
142	get_length (void)	278	get_length (void)
143	{	279	{
144	U32 res = get_u8 ();	280	UV res = get_u8 ();
145		281
146	if (res & 0x80)	282	if (res & 0x80)
147	{	283	{
148	int cnt = res & 0x7f;	284	int cnt = res & 0x7f;
149	res = 0;	285	res = 0;
150		286
151	switch (cnt)	287	switch (cnt)
152	{	288	{
153	case 0:	289	case 0:
154	error ("indefinite ASN.1 lengths not supported");	290	error ("indefinite BER value lengths not supported");
155	return 0;	291
		292	case 0x7f:
		293	error ("BER reserved value in length (X.690 8.1.3.5)");
156		294
157	default:	295	default:
158	error ("ASN.1 length too long");	296	error ("BER value length too long (must fit into UV)");
159	return 0;
160		297
		298	#if UVSIZE > 4
		299	case 8: res = (res << 8) | get_u8 ();
		300	case 7: res = (res << 8) | get_u8 ();
		301	case 6: res = (res << 8) | get_u8 ();
		302	case 5: res = (res << 8) | get_u8 ();
		303	#endif
161	case 4: res = (res << 8) | get_u8 ();	304	case 4: res = (res << 8) | get_u8 ();
162	case 3: res = (res << 8) | get_u8 ();	305	case 3: res = (res << 8) | get_u8 ();
163	case 2: res = (res << 8) | get_u8 ();	306	case 2: res = (res << 8) | get_u8 ();
164	case 1: res = (res << 8) | get_u8 ();	307	case 1: res = (res << 8) | get_u8 ();
165	}	308	}
166	}	309	}
167		310
168	return res;	311	return res;
169	}	312	}
170		313
171	static U32
172	get_integer32 (void)
173	{
174	U32 length = get_length ();
175
176	if (length <= 0)
177	{
178	error ("INTEGER32 length equal to zero");
179	return 0;
180	}
181
182	U8 *data = get_n (length, 0);
183
184	if (!data)
185	return 0;
186
187	if (length > 5 || (length > 4 && data [0]))
188	{
189	error ("INTEGER32 length too long");
190	return 0;
191	}
192
193	U32 res = data [0] & 0x80 ? 0xffffffff : 0;
194
195	while (length--)
196	res = (res << 8) | *data++;
197
198	return res;
199	}
200
201	static SV *	314	static SV *
202	decode_integer32 (void)	315	decode_int (void)
203	{	316	{
204	return newSViv ((I32)get_integer32 ());	317	UV len = get_length ();
		318
		319	if (!len)
		320	error ("invalid BER_TYPE_INT length zero (X.690 8.3.1)");
		321
		322	U8 *data = get_n (len);
		323
		324	if (expect_false (len > 1))
		325	{
		326	U16 mask = (data [0] << 8) | data [1] & 0xff80;
		327
		328	if (expect_false (mask == 0xff80 || mask == 0x0000))
		329	error ("illegal padding in BER_TYPE_INT (X.690 8.3.2)");
		330	}
		331
		332	int negative = data [0] & 0x80;
		333
		334	UV val = negative ? -1 : 0; // copy signbit to all bits
		335
		336	if (len > UVSIZE + (!negative && !*data))
		337	error ("BER_TYPE_INT overflow");
		338
		339	do
		340	val = (val << 8) | *data++;
		341	while (--len);
		342
		343	// the cast to IV relies on implementation-defined behaviour (two's complement cast)
		344	// but that's ok, as perl relies on it as well.
		345	return negative ? newSViv ((IV)val) : newSVuv (val);
205	}	346	}
206		347
207	static SV *	348	static SV *
208	decode_unsigned32 (void)	349	decode_data (void)
209	{	350	{
210	return newSVuv ((U32)get_integer32 ());
211	}
212
213	#if IVSIZE >= 8
214
215	static U64TYPE
216	get_integer64 (void)
217	{
218	U32 length = get_length ();	351	UV len = get_length ();
219		352	return newSVpvn ((char *)get_n (len), len);
220	if (length <= 0)
221	{
222	error ("INTEGER64 length equal to zero");
223	return 0;
224	}
225
226	U8 *data = get_n (length, 0);
227
228	if (!data)
229	return 0;
230
231	if (length > 9 || (length > 8 && data [0]))
232	{
233	error ("INTEGER64 length too long");
234	return 0;
235	}
236
237	U64TYPE res = data [0] & 0x80 ? 0xffffffffffffffff : 0;
238
239	while (length--)
240	res = (res << 8) | *data++;
241
242	return res;
243	}	353	}
244		354
245	static SV *
246	decode_integer64 (void)
247	{
248	return newSViv ((I64TYPE)get_integer64 ());
249	}
250
251	static SV *
252	decode_unsigned64 (void)
253	{
254	return newSVuv ((U64TYPE)get_integer64 ());
255	}
256
257	#endif
258
259	static SV *
260	decode_octet_string (void)
261	{
262	U32 length = get_length ();
263
264	U8 *data = get_n (length, 0);
265	if (!data)
266	{
267	error ("OCTET STRING too long");
268	return &PL_sv_undef;
269	}
270
271	return newSVpvn (data, length);
272	}
273
274	// gelper for decode_object_identifier	355	// helper for decode_object_identifier
275	static char *	356	static char *
276	write_uv (char *buf, U32 u)	357	write_uv (char *buf, UV u)
277	{	358	{
278	// the one-digit case is absolutely predominant, so this pays off (hopefully)	359	// the one-digit case is absolutely predominant, so this pays off (hopefully)
279	if (u < 10)	360	if (expect_true (u < 10))
280	*buf++ = u + '0';	361	*buf++ = u + '0';
281	else	362	else
282	{	363	{
		364	// this *could* be done much faster using branchless fixed-point arithmetics
283	char *beg = buf;	365	char *beg = buf;
284		366
285	do	367	do
286	{	368	{
287	*buf++ = u % 10 + '0';	369	*buf++ = u % 10 + '0';
288	u /= 10;	370	u /= 10;
289	}	371	}
290	while (u);	372	while (u);
291		373
292	// reverse digits	374	// reverse digits
293	for (char *ptr = buf; --ptr != beg; ++beg)	375	char *ptr = buf;
		376	while (--ptr > beg)
294	{	377	{
295	char c = *ptr;	378	char c = *ptr;
296	*ptr = *beg;	379	*ptr = *beg;
297	*beg = c;	380	*beg = c;
		381	++beg;
298	}	382	}
299	}	383	}
300		384
301	return buf;	385	return buf;
302	}	386	}
303		387
304	static SV *	388	static SV *
305	decode_object_identifier (void)	389	decode_oid (int relative)
306	{	390	{
307	U32 length = get_length ();	391	UV len = get_length ();
308		392
309	if (length <= 0)	393	if (len <= 0)
310	{	394	{
311	error ("OBJECT IDENTIFIER length equal to zero");	395	error ("BER_TYPE_OID length must not be zero");
312	return &PL_sv_undef;	396	return &PL_sv_undef;
313	}	397	}
314		398
315	U8 *end = cur + length;	399	U8 *end = cur + len;
316	U32 w = get_ber ();	400	UV w = get_w ();
317		401
318	static char oid[MAX_OID_STRLEN]; // must be static	402	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
319	char *app = oid;	403	char *app = oid;
320		404
		405	if (relative)
		406	app = write_uv (app, w);
		407	else if (w < 2 * 40)
		408	{
321	app = write_uv (app, (U8)w / 40);	409	app = write_uv (app, (U8)w / 40);
322	*app++ = '.';	410	*app++ = '.';
323	app = write_uv (app, (U8)w % 40);	411	app = write_uv (app, (U8)w % 40);
		412	}
		413	else
		414	{
		415	app = write_uv (app, 2);
		416	*app++ = '.';
		417	app = write_uv (app, w - 2 * 40);
		418	}
324		419
		420	while (cur < end)
		421	{
325	// we assume an oid component is never > 64 bytes	422	// we assume an oid component is never > 64 digits
326	while (cur < end && oid + sizeof (oid) - app > 64)	423	if (oid + sizeof (oid) - app < 64)
327	{	424	croak ("BER_TYPE_OID to long to decode");
		425
328	w = get_ber ();	426	w = get_w ();
329	*app++ = '.';	427	*app++ = '.';
330	app = write_uv (app, w);	428	app = write_uv (app, w);
331	}	429	}
332		430
333	return newSVpvn (oid, app - oid);	431	return newSVpvn (oid, app - oid);
334	}	432	}
335		433
		434	// TODO: this is unacceptably slow
336	static SV *	435	static SV *
		436	decode_ucs (int chrsize)
		437	{
		438	SV *res = NEWSV (0, 0);
		439
		440	UV len = get_length ();
		441
		442	if (len & (chrsize - 1))
		443	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		444
		445	while (len)
		446	{
		447	U8 b1 = get_u8 ();
		448	U8 b2 = get_u8 ();
		449	U32 chr = (b1 << 8) | b2;
		450
		451	if (chrsize == 4)
		452	{
		453	U8 b3 = get_u8 ();
		454	U8 b4 = get_u8 ();
		455	chr = (chr << 16) | (b3 << 8) | b4;
		456	}
		457
		458	U8 uchr [UTF8_MAXBYTES];
		459	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		460
		461	sv_catpvn (res, (const char *)uchr, uclen);
		462	len -= chrsize;
		463	}
		464
		465	SvUTF8_on (res);
		466
		467	return res;
		468	}
		469
		470	static SV *
337	decode_ber ()	471	decode_ber (void)
338	{	472	{
339	int identifier = get_u8 ();	473	int identifier = get_u8 ();
340		474
341	SV *res;	475	SV *res;
342		476
343	int constructed = identifier & ASN_CONSTRUCTED;	477	int constructed = identifier & ASN_CONSTRUCTED;
344	int klass = identifier & ASN_CLASS_MASK;	478	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
345	int tag = identifier & ASN_TAG_MASK;	479	int tag = identifier & ASN_TAG_MASK;
346		480
347	if (tag == ASN_TAG_BER)	481	if (tag == ASN_TAG_BER)
348	tag = get_ber ();	482	tag = get_w ();
349
350	if (tag == ASN_TAG_BER)
351	tag = get_ber ();
352		483
353	if (constructed)	484	if (constructed)
354	{	485	{
355	U32 len = get_length ();	486	UV len = get_length ();
356	U32 seqend = (cur - buf) + len;	487	UV seqend = (cur - buf) + len;
357	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	488	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
358		489
359	while (cur < buf + seqend)	490	while (cur < buf + seqend)
360	av_push (av, decode_ber ());	491	av_push (av, decode_ber ());
361		492
362	if (cur > buf + seqend)	493	if (cur > buf + seqend)
363	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	494	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
364		495
365	res = newRV_inc ((SV *)av);	496	res = newRV_inc ((SV *)av);
366	}	497	}
367	else	498	else
368	switch (identifier)	499	switch (profile_lookup (cur_profile, klass, tag))
369	{	500	{
370	case ASN_NULL:	501	case BER_TYPE_NULL:
		502	{
		503	UV len = get_length ();
		504
		505	if (len)
		506	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		507
371	res = &PL_sv_undef;	508	res = &PL_sv_undef;
		509	}
372	break;	510	break;
373		511
374	case ASN_OBJECT_IDENTIFIER:	512	case BER_TYPE_BOOL:
		513	{
		514	UV len = get_length ();
		515
		516	if (len != 1)
		517	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
		518
		519	res = newSVcacheint (!!get_u8 ());
		520	}
		521	break;
		522
		523	case BER_TYPE_OID:
375	res = decode_object_identifier ();	524	res = decode_oid (0);
376	break;	525	break;
377		526
378	case ASN_INTEGER32:	527	case BER_TYPE_RELOID:
		528	res = decode_oid (1);
		529	break;
		530
		531	case BER_TYPE_INT:
379	res = decode_integer32 ();	532	res = decode_int ();
380	break;	533	break;
381		534
382	case ASN_APPLICATION | ASN_UNSIGNED32:	535	case BER_TYPE_UTF8:
383	case ASN_APPLICATION | ASN_COUNTER32:	536	res = decode_data ();
384	case ASN_APPLICATION | ASN_TIMETICKS:	537	SvUTF8_on (res);
		538	break;
		539
		540	case BER_TYPE_BYTES:
		541	res = decode_data ();
		542	break;
		543
		544	case BER_TYPE_IPADDRESS:
		545	{
		546	UV len = get_length ();
		547
		548	if (len != 4)
		549	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		550
		551	U8 c1 = get_u8 ();
		552	U8 c2 = get_u8 ();
		553	U8 c3 = get_u8 ();
		554	U8 c4 = get_u8 ();
		555
		556	res = newSVpvf ("%d.%d.%d.%d", c1, c2, c3, c4);
		557	}
		558	break;
		559
		560	case BER_TYPE_UCS2:
		561	res = decode_ucs (2);
		562	break;
		563
		564	case BER_TYPE_UCS4:
385	res = decode_unsigned32 ();	565	res = decode_ucs (4);
386	break;	566	break;
387		567
388	#if 0 // handled by default case	568	case BER_TYPE_REAL:
389	case ASN_OCTET_STRING:	569	error ("BER_TYPE_REAL not implemented");
390	case ASN_APPLICATION | ASN_IPADDRESS:
391	case ASN_APPLICATION | ASN_OPAQUE:
392	res = decode_octet_string ();
393	break;
394	#endif
395		570
396	case ASN_APPLICATION | ASN_COUNTER64:	571	case BER_TYPE_CROAK:
397	res = decode_integer64 ();	572	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
398	break;
399		573
400	default:	574	default:
401	res = decode_octet_string ();	575	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
402	break;
403	}	576	}
404		577
405	AV *av = newAV ();	578	AV *av = newAV ();
406	av_fill (av, BER_ARRAYSIZE - 1);	579	av_fill (av, BER_ARRAYSIZE - 1);
407	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	580	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
408	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	581	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
409	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	582	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
410	AvARRAY (av)[BER_DATA ] = res;	583	AvARRAY (av)[BER_DATA ] = res;
411		584
412	return newRV_noinc ((SV *)av);	585	return newRV_noinc ((SV *)av);
413	}	586	}
414		587
		588	/////////////////////////////////////////////////////////////////////////////
		589	// encoder
		590
		591	/* adds two STRLENs together, slow, and with paranoia */
		592	static STRLEN
		593	strlen_sum (STRLEN l1, STRLEN l2)
		594	{
		595	size_t sum = l1 + l2;
		596
		597	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		598	croak ("Convert::BER::XS: string size overflow");
		599
		600	return sum;
		601	}
		602
		603	static void
		604	set_buf (SV *sv)
		605	{
		606	STRLEN len;
		607	buf_sv = sv;
		608	buf = (U8 *)SvPVbyte (buf_sv, len);
		609	cur = buf;
		610	end = buf + len;
		611	}
		612
		613	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		614	static char *
		615	my_sv_grow (SV *sv, size_t len1, size_t len2)
		616	{
		617	len1 = strlen_sum (len1, len2);
		618	len1 = strlen_sum (len1, len1 >> 1);
		619
		620	if (len1 > 4096 - 24)
		621	len1 = (len1 | 4095) - 24;
		622
		623	return SvGROW (sv, len1);
		624	}
		625
		626	static void
		627	need (STRLEN len)
		628	{
		629	if (expect_false ((uintptr_t)(end - cur) < len))
		630	{
		631	STRLEN pos = cur - buf;
		632	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		633	cur = buf + pos;
		634	end = buf + SvLEN (buf_sv) - 1;
		635	}
		636	}
		637
		638	static void
		639	put_u8 (int val)
		640	{
		641	need (1);
		642	*cur++ = val;
		643	}
		644
		645	static void
		646	put_w_nocheck (UV val)
		647	{
		648	#if UVSIZE > 4
		649	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		650	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		651	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		652	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		653	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		654	#endif
		655	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		656	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		657	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		658	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		659	*cur = val & 0x7f; cur += 1;
		660	}
		661
		662	static void
		663	put_w (UV val)
		664	{
		665	need (5); // we only handle up to 5 bytes
		666
		667	put_w_nocheck (val);
		668	}
		669
		670	static U8 *
		671	put_length_at (UV val, U8 *cur)
		672	{
		673	if (val < 0x7fU)
		674	*cur++ = val;
		675	else
		676	{
		677	U8 *lenb = cur++;
		678
		679	#if UVSIZE > 4
		680	*cur = val >> 56; cur += *cur > 0;
		681	*cur = val >> 48; cur += *cur > 0;
		682	*cur = val >> 40; cur += *cur > 0;
		683	*cur = val >> 32; cur += *cur > 0;
		684	#endif
		685	*cur = val >> 24; cur += *cur > 0;
		686	*cur = val >> 16; cur += *cur > 0;
		687	*cur = val >> 8; cur += *cur > 0;
		688	*cur = val ; cur += 1;
		689
		690	*lenb = 0x80 + cur - lenb - 1;
		691	}
		692
		693	return cur;
		694	}
		695
		696	static void
		697	put_length (UV val)
		698	{
		699	need (5 + val);
		700	cur = put_length_at (val, cur);
		701	}
		702
		703	// return how many bytes the encoded length requires
		704	static int length_length (UV val)
		705	{
		706	return val < 0x7fU
		707	? 1
		708	: 2
		709	+ (val > 0xffU)
		710	+ (val > 0xffffU)
		711	+ (val > 0xffffffU)
		712	#if UVSIZE > 4
		713	+ (val > 0xffffffffU)
		714	+ (val > 0xffffffffffU)
		715	+ (val > 0xffffffffffffU)
		716	+ (val > 0xffffffffffffffU)
		717	#endif
		718	;
		719	}
		720
		721	static void
		722	encode_data (const char *ptr, STRLEN len)
		723	{
		724	put_length (len);
		725	memcpy (cur, ptr, len);
		726	cur += len;
		727	}
		728
		729	static void
		730	encode_uv (UV uv)
		731	{
		732	}
		733
		734	static void
		735	encode_int (SV *sv)
		736	{
		737	need (8 + 1 + 1); // 64 bit + length + extra 0
		738
		739	if (expect_false (!SvIOK (sv)))
		740	sv_2iv_flags (sv, 0);
		741
		742	U8 *lenb = cur++;
		743
		744	if (SvIOK_notUV (sv))
		745	{
		746	IV iv = SvIVX (sv);
		747
		748	if (expect_false (iv < 0))
		749	{
		750	// get two's complement bit pattern - works even on hypothetical non-2c machines
		751	UV uv = iv;
		752
		753	#if UVSIZE > 4
		754	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		755	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		756	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		757	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		758	#endif
		759	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		760	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		761	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		762	*cur = uv ; cur += 1;
		763
		764	*lenb = cur - lenb - 1;
		765
		766	return;
		767	}
		768	}
		769
		770	UV uv = SvUV (sv);
		771
		772	// prepend an extra 0 if the high bit is 1
		773	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		774
		775	#if UVSIZE > 4
		776	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		777	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		778	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		779	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		780	#endif
		781	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		782	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		783	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		784	*cur = uv ; cur += 1;
		785
		786	*lenb = cur - lenb - 1;
		787	}
		788
		789	// we don't know the length yet, so we optimistically
		790	// assume the length will need one octet later. If that
		791	// turns out to be wrong, we memmove as needed.
		792	// mark the beginning
		793	static STRLEN
		794	len_fixup_mark (void)
		795	{
		796	return cur++ - buf;
		797	}
		798
		799	// patch up the length
		800	static void
		801	len_fixup (STRLEN mark)
		802	{
		803	STRLEN reallen = (cur - buf) - mark - 1;
		804	int lenlen = length_length (reallen);
		805
		806	if (expect_false (lenlen > 1))
		807	{
		808	// bad luck, we have to shift the bytes to make room for the length
		809	need (5);
		810	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		811	cur += lenlen - 1;
		812	}
		813
		814	put_length_at (reallen, buf + mark);
		815	}
		816
		817	static char *
		818	read_uv (char *str, UV *uv)
		819	{
		820	UV r = 0;
		821
		822	while (*str >= '0')
		823	r = r * 10 + *str++ - '0';
		824
		825	*uv = r;
		826
		827	str += !!*str; // advance over any non-zero byte
		828
		829	return str;
		830	}
		831
		832	static void
		833	encode_oid (SV *oid, int relative)
		834	{
		835	STRLEN len;
		836	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		837
		838	// we need at most as many octets as the string form
		839	need (len + 1);
		840	STRLEN mark = len_fixup_mark ();
		841
		842	UV w1, w2;
		843
		844	if (!relative)
		845	{
		846	ptr = read_uv (ptr, &w1);
		847	ptr = read_uv (ptr, &w2);
		848
		849	put_w_nocheck (w1 * 40 + w2);
		850	}
		851
		852	while (*ptr)
		853	{
		854	ptr = read_uv (ptr, &w1);
		855	put_w_nocheck (w1);
		856	}
		857
		858	len_fixup (mark);
		859	}
		860
		861	// check whether an SV is a BER tuple and returns its AV *
		862	static AV *
		863	ber_tuple (SV *tuple)
		864	{
		865	SV *rv;
		866
		867	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		868	croak ("BER tuple must be array-reference");
		869
		870	if (expect_false (SvRMAGICAL (rv)))
		871	croak ("BER tuple must not be tied");
		872
		873	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		874	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		875
		876	return (AV *)rv;
		877	}
		878
		879	static void
		880	encode_ucs (SV *data, int chrsize)
		881	{
		882	STRLEN uchars = sv_len_utf8 (data);
		883	STRLEN len;;
		884	char *ptr = SvPVutf8 (data, len);
		885
		886	put_length (uchars * chrsize);
		887
		888	while (uchars--)
		889	{
		890	STRLEN uclen;
		891	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		892
		893	ptr += uclen;
		894	len -= uclen;
		895
		896	if (chrsize == 4)
		897	{
		898	*cur++ = uchr >> 24;
		899	*cur++ = uchr >> 16;
		900	}
		901
		902	*cur++ = uchr >> 8;
		903	*cur++ = uchr;
		904	}
		905	}
		906	static void
		907	encode_ber (SV *tuple)
		908	{
		909	AV *av = ber_tuple (tuple);
		910
		911	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		912	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		913	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		914	SV *data = AvARRAY (av)[BER_DATA];
		915
		916	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		917
		918	if (expect_false (tag >= ASN_TAG_BER))
		919	{
		920	put_u8 (identifier | ASN_TAG_BER);
		921	put_w (tag);
		922	}
		923	else
		924	put_u8 (identifier | tag);
		925
		926	if (constructed)
		927	{
		928	// we optimistically assume that only one length byte is needed
		929	// and adjust later
		930	need (1);
		931	STRLEN mark = len_fixup_mark ();
		932
		933	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		934	croak ("BER CONSTRUCTED data must be array-reference");
		935
		936	AV *av = (AV *)SvRV (data);
		937	int fill = AvFILL (av);
		938
		939	if (expect_false (SvRMAGICAL (av)))
		940	croak ("BER CONSTRUCTED data must not be tied");
		941
		942	int i;
		943	for (i = 0; i <= fill; ++i)
		944	encode_ber (AvARRAY (av)[i]);
		945
		946	len_fixup (mark);
		947	}
		948	else
		949	switch (profile_lookup (cur_profile, klass, tag))
		950	{
		951	case BER_TYPE_NULL:
		952	put_length (0);
		953	break;
		954
		955	case BER_TYPE_BOOL:
		956	put_length (1);
		957	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		958	break;
		959
		960	case BER_TYPE_OID:
		961	encode_oid (data, 0);
		962	break;
		963
		964	case BER_TYPE_RELOID:
		965	encode_oid (data, 1);
		966	break;
		967
		968	case BER_TYPE_INT:
		969	encode_int (data);
		970	break;
		971
		972	case BER_TYPE_BYTES:
		973	{
		974	STRLEN len;
		975	const char *ptr = SvPVbyte (data, len);
		976	encode_data (ptr, len);
		977	}
		978	break;
		979
		980	case BER_TYPE_UTF8:
		981	{
		982	STRLEN len;
		983	const char *ptr = SvPVutf8 (data, len);
		984	encode_data (ptr, len);
		985	}
		986	break;
		987
		988	case BER_TYPE_IPADDRESS:
		989	{
		990	U8 ip[4];
		991	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		992	encode_data ((const char *)ip, sizeof (ip));
		993	}
		994	break;
		995
		996	case BER_TYPE_UCS2:
		997	encode_ucs (data, 2);
		998	break;
		999
		1000	case BER_TYPE_UCS4:
		1001	encode_ucs (data, 4);
		1002	break;
		1003
		1004	case BER_TYPE_REAL:
		1005	croak ("BER_TYPE_REAL not implemented");
		1006
		1007	case BER_TYPE_CROAK:
		1008	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		1009
		1010	default:
		1011	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		1012	}
		1013
		1014	}
		1015
		1016	/////////////////////////////////////////////////////////////////////////////
		1017
415	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1018	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
416		1019
417	PROTOTYPES: ENABLE	1020	PROTOTYPES: ENABLE
418		1021
419	BOOT:	1022	BOOT:
420	{	1023	{
421	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1024	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1025
		1026	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
422		1027
423	static const struct {	1028	static const struct {
424	const char *name;	1029	const char *name;
425	IV iv;	1030	IV iv;
426	} *civ, const_iv[] = {	1031	} *civ, const_iv[] = {
427	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1032	#define const_iv(name) { # name, name },
428	{ "ASN_INTEGER32", ASN_INTEGER32 },	1033	const_iv (ASN_BOOLEAN)
429	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1034	const_iv (ASN_INTEGER)
430	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1035	const_iv (ASN_BIT_STRING)
431	{ "ASN_NULL", ASN_NULL },	1036	const_iv (ASN_OCTET_STRING)
432	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1037	const_iv (ASN_NULL)
433	{ "ASN_TAG_BER", ASN_TAG_BER },	1038	const_iv (ASN_OBJECT_IDENTIFIER)
434	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1039	const_iv (ASN_OBJECT_DESCRIPTOR)
435	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1040	const_iv (ASN_OID)
436	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1041	const_iv (ASN_EXTERNAL)
437	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1042	const_iv (ASN_REAL)
438	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1043	const_iv (ASN_SEQUENCE)
439	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1044	const_iv (ASN_ENUMERATED)
440	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1045	const_iv (ASN_EMBEDDED_PDV)
441	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1046	const_iv (ASN_UTF8_STRING)
442	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1047	const_iv (ASN_RELATIVE_OID)
443	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1048	const_iv (ASN_SET)
444	{ "ASN_COUNTER32", ASN_COUNTER32 },	1049	const_iv (ASN_NUMERIC_STRING)
445	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1050	const_iv (ASN_PRINTABLE_STRING)
446	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1051	const_iv (ASN_TELETEX_STRING)
447	{ "ASN_OPAQUE", ASN_OPAQUE },	1052	const_iv (ASN_T61_STRING)
448	{ "ASN_COUNTER64", ASN_COUNTER64 },	1053	const_iv (ASN_VIDEOTEX_STRING)
		1054	const_iv (ASN_IA5_STRING)
		1055	const_iv (ASN_ASCII_STRING)
		1056	const_iv (ASN_UTC_TIME)
		1057	const_iv (ASN_GENERALIZED_TIME)
		1058	const_iv (ASN_GRAPHIC_STRING)
		1059	const_iv (ASN_VISIBLE_STRING)
		1060	const_iv (ASN_ISO646_STRING)
		1061	const_iv (ASN_GENERAL_STRING)
		1062	const_iv (ASN_UNIVERSAL_STRING)
		1063	const_iv (ASN_CHARACTER_STRING)
		1064	const_iv (ASN_BMP_STRING)
449		1065
450	{ "BER_CLASS" , BER_CLASS },	1066	const_iv (ASN_UNIVERSAL)
451	{ "BER_TAG" , BER_TAG },	1067	const_iv (ASN_APPLICATION)
452	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1068	const_iv (ASN_CONTEXT)
453	{ "BER_DATA" , BER_DATA },	1069	const_iv (ASN_PRIVATE)
		1070
		1071	const_iv (BER_CLASS)
		1072	const_iv (BER_TAG)
		1073	const_iv (BER_FLAGS)
		1074	const_iv (BER_DATA)
		1075
		1076	const_iv (BER_TYPE_BYTES)
		1077	const_iv (BER_TYPE_UTF8)
		1078	const_iv (BER_TYPE_UCS2)
		1079	const_iv (BER_TYPE_UCS4)
		1080	const_iv (BER_TYPE_INT)
		1081	const_iv (BER_TYPE_OID)
		1082	const_iv (BER_TYPE_RELOID)
		1083	const_iv (BER_TYPE_NULL)
		1084	const_iv (BER_TYPE_BOOL)
		1085	const_iv (BER_TYPE_REAL)
		1086	const_iv (BER_TYPE_IPADDRESS)
		1087	const_iv (BER_TYPE_CROAK)
		1088
		1089	const_iv (SNMP_IPADDRESS)
		1090	const_iv (SNMP_COUNTER32)
		1091	const_iv (SNMP_GAUGE32)
		1092	const_iv (SNMP_UNSIGNED32)
		1093	const_iv (SNMP_TIMETICKS)
		1094	const_iv (SNMP_OPAQUE)
		1095	const_iv (SNMP_COUNTER64)
454	};	1096	};
455		1097
456	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1098	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
457	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));	1099	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
458	}	1100	}
459		1101
460	SV *	1102	void
461	ber_decode (SV *ber)	1103	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1104	ALIAS:
		1105	ber_decode_prefix = 1
462	CODE:	1106	PPCODE:
463	{	1107	{
		1108	cur_profile = SvPROFILE (profile);
		1109	STRLEN len;
464	buf = SvPVbyte (ber, len);	1110	buf = (U8 *)SvPVbyte (ber, len);
465	cur = buf;	1111	cur = buf;
466	rem = len;	1112	end = buf + len;
467		1113
468	RETVAL = decode_ber ();	1114	SV *tuple = decode_ber ();
		1115
		1116	EXTEND (SP, 2);
		1117	PUSHs (sv_2mortal (tuple));
		1118
		1119	if (ix)
		1120	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1121	else if (cur != end)
		1122	error ("trailing garbage after BER value");
469	}	1123	}
470	OUTPUT: RETVAL
471		1124
472	void	1125	void
473	ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *constructed = &PL_sv_undef, SV *data = &PL_sv_undef)	1126	ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *flags = &PL_sv_undef, SV *data = &PL_sv_undef)
474	PROTOTYPE: $;$$$
475	PPCODE:	1127	PPCODE:
476	{	1128	{
477	if (!SvOK (tuple))	1129	if (!SvOK (tuple))
478	XSRETURN_NO;	1130	XSRETURN_NO;
479		1131
480	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1132	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
481	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1133	croak ("ber_is: tuple must be BER tuple (array-ref)");
482		1134
483	AV *av = (AV *)SvRV (tuple);	1135	AV *av = (AV *)SvRV (tuple);
484		1136
485	XPUSHs (	1137	XPUSHs (
486	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1138	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
487	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1139	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
488	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1140	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
489	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1141	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
490	? &PL_sv_yes : &PL_sv_no);	1142	? &PL_sv_yes : &PL_sv_undef);
491	}	1143	}
492		1144
493	void	1145	void
494	ber_is_seq (SV *tuple)	1146	ber_is_seq (SV *tuple)
495	PROTOTYPE: $
496	PPCODE:	1147	PPCODE:
497	{	1148	{
498	if (!SvOK (tuple))	1149	if (!SvOK (tuple))
499	XSRETURN_UNDEF;	1150	XSRETURN_UNDEF;
500		1151
501	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1152	AV *av = ber_tuple (tuple);
502	croak ("ber_seq: tuple must be ber tuple (array-ref)");
503
504	AV *av = (AV *)SvRV (tuple);
505		1153
506	XPUSHs (	1154	XPUSHs (
507	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1155	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
508	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1156	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
509	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1157	&& SvIV (AvARRAY (av)[BER_FLAGS])
510	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1158	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
511	}	1159	}
512		1160
513	void	1161	void
514	ber_is_i32 (SV *tuple, IV value)	1162	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
515	PROTOTYPE: $$
516	PPCODE:	1163	PPCODE:
517	{	1164	{
518	if (!SvOK (tuple))	1165	if (!SvOK (tuple))
519	XSRETURN_NO;	1166	XSRETURN_NO;
520		1167
521	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1168	AV *av = ber_tuple (tuple);
522	croak ("ber_seq: tuple must be ber tuple (array-ref)");
523		1169
524	AV *av = (AV *)SvRV (tuple);	1170	UV data = SvUV (AvARRAY (av)[BER_DATA]);
525		1171
526	XPUSHs (	1172	XPUSHs (
527	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1173	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
528	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1174	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
529	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1175	&& !SvIV (AvARRAY (av)[BER_FLAGS])
530	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1176	&& (!SvOK (value) || data == SvUV (value))
531	? &PL_sv_yes : &PL_sv_no);	1177	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1178	: &PL_sv_undef);
532	}	1179	}
533		1180
534	void	1181	void
535	ber_is_oid (SV *tuple, SV *oid)	1182	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
536	PROTOTYPE: $$
537	PPCODE:	1183	PPCODE:
538	{	1184	{
539	if (!SvOK (tuple))	1185	if (!SvOK (tuple))
540	XSRETURN_NO;	1186	XSRETURN_NO;
541		1187
542	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1188	AV *av = ber_tuple (tuple);
543	croak ("ber_seq: tuple must be ber tuple (array-ref)");
544
545	AV *av = (AV *)SvRV (tuple);
546		1189
547	XPUSHs (	1190	XPUSHs (
548	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1191	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
549	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1192	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
550	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1193	&& !SvIV (AvARRAY (av)[BER_FLAGS])
551	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1194	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
552	? &PL_sv_yes : &PL_sv_no);	1195	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
553	}	1196	}
554		1197
		1198	#############################################################################
		1199
		1200	void
		1201	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1202	PPCODE:
		1203	{
		1204	cur_profile = SvPROFILE (profile);
		1205	buf_sv = sv_2mortal (NEWSV (0, 256));
		1206	SvPOK_only (buf_sv);
		1207	set_buf (buf_sv);
		1208
		1209	encode_ber (tuple);
		1210
		1211	SvCUR_set (buf_sv, cur - buf);
		1212	XPUSHs (buf_sv);
		1213	}
		1214
		1215	SV *
		1216	ber_int (SV *sv)
		1217	CODE:
		1218	{
		1219	AV *av = newAV ();
		1220	av_fill (av, BER_ARRAYSIZE - 1);
		1221	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1222	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1223	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1224	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1225	RETVAL = newRV_noinc ((SV *)av);
		1226	}
		1227	OUTPUT: RETVAL
		1228
		1229	# TODO: not arrayref, but elements?
		1230	SV *
		1231	ber_seq (SV *arrayref)
		1232	CODE:
		1233	{
		1234	AV *av = newAV ();
		1235	av_fill (av, BER_ARRAYSIZE - 1);
		1236	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1237	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1238	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1239	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1240	RETVAL = newRV_noinc ((SV *)av);
		1241	}
		1242	OUTPUT: RETVAL
		1243
		1244	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1245
		1246	SV *
		1247	new (SV *klass)
		1248	CODE:
		1249	RETVAL = profile_new ();
		1250	OUTPUT: RETVAL
		1251
		1252	void
		1253	set (SV *profile, int klass, int tag, int type)
		1254	CODE:
		1255	profile_set (SvPROFILE (profile), klass, tag, type);
		1256
		1257	IV
		1258	get (SV *profile, int klass, int tag)
		1259	CODE:
		1260	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1261	OUTPUT: RETVAL
		1262
		1263	void
		1264	_set_default (SV *profile)
		1265	CODE:
		1266	default_profile = SvPROFILE (profile);
		1267
		1268

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