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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 1.29 by root, Tue Apr 23 19:44:12 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 (expect_true (!(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 (expect_false (res & 0x80))
147	{	283	{
148	int cnt = res & 0x7f;	284	U8 cnt = res & 0x7f;
		285
		286	// this genewrates quite ugly code, but the overhead
		287	// of copying the bytes for these lengths is probably so high
		288	// that a slightly inefficient get_length won't matter.
		289
		290	if (expect_false (cnt == 0))
		291	error ("indefinite BER value lengths not supported");
		292
		293	if (expect_false (cnt > UVSIZE))
		294	error ("BER value length too long (must fit into UV) or BER reserved value in length (X.690 8.1.3.5)");
		295
		296	want (cnt);
		297
149	res = 0;	298	res = 0;
150		299	do
151	switch (cnt)	300	res = (res << 8) | *cur++;
152	{	301	while (--cnt);
153	case 0:
154	error ("indefinite ASN.1 lengths not supported");
155	return 0;
156
157	default:
158	error ("ASN.1 length too long");
159	return 0;
160
161	case 4: res = (res << 8) | get_u8 ();
162	case 3: res = (res << 8) | get_u8 ();
163	case 2: res = (res << 8) | get_u8 ();
164	case 1: res = (res << 8) | get_u8 ();
165	}
166	}	302	}
167		303
168	return res;	304	return res;
169	}	305	}
170		306
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 *	307	static SV *
202	decode_integer32 (void)	308	decode_int (void)
203	{	309	{
204	return newSViv ((I32)get_integer32 ());	310	UV len = get_length ();
		311
		312	if (!len)
		313	error ("invalid BER_TYPE_INT length zero (X.690 8.3.1)");
		314
		315	U8 *data = get_n (len);
		316
		317	if (expect_false (len > 1))
		318	{
		319	U16 mask = (data [0] << 8) | data [1] & 0xff80;
		320
		321	if (expect_false (mask == 0xff80 || mask == 0x0000))
		322	error ("illegal padding in BER_TYPE_INT (X.690 8.3.2)");
		323	}
		324
		325	int negative = data [0] & 0x80;
		326
		327	UV val = negative ? -1 : 0; // copy signbit to all bits
		328
		329	if (len > UVSIZE + (!negative && !*data))
		330	error ("BER_TYPE_INT overflow");
		331
		332	do
		333	val = (val << 8) | *data++;
		334	while (--len);
		335
		336	// the cast to IV relies on implementation-defined behaviour (two's complement cast)
		337	// but that's ok, as perl relies on it as well.
		338	return negative ? newSViv ((IV)val) : newSVuv (val);
205	}	339	}
206		340
207	static SV *	341	static SV *
208	decode_unsigned32 (void)	342	decode_data (void)
209	{	343	{
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 ();	344	UV len = get_length ();
219		345	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	}	346	}
244		347
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	348	// helper for decode_object_identifier
275	static char *	349	static char *
276	write_uv (char *buf, U32 u)	350	write_uv (char *buf, UV u)
277	{	351	{
278	// the one-digit case is absolutely predominant, so this pays off (hopefully)	352	// the one-digit case is absolutely predominant, so this pays off (hopefully)
279	if (u < 10)	353	if (expect_true (u < 10))
280	*buf++ = u + '0';	354	*buf++ = u + '0';
281	else	355	else
282	{	356	{
		357	// this *could* be done much faster using branchless fixed-point arithmetics
283	char *beg = buf;	358	char *beg = buf;
284		359
285	do	360	do
286	{	361	{
287	*buf++ = u % 10 + '0';	362	*buf++ = u % 10 + '0';
288	u /= 10;	363	u /= 10;
289	}	364	}
290	while (u);	365	while (u);
291		366
292	// reverse digits	367	// reverse digits
293	for (char *ptr = buf; --ptr != beg; ++beg)	368	char *ptr = buf;
		369	while (--ptr > beg)
294	{	370	{
295	char c = *ptr;	371	char c = *ptr;
296	*ptr = *beg;	372	*ptr = *beg;
297	*beg = c;	373	*beg = c;
		374	++beg;
298	}	375	}
299	}	376	}
300		377
301	return buf;	378	return buf;
302	}	379	}
303		380
304	static SV *	381	static SV *
305	decode_object_identifier (void)	382	decode_oid (int relative)
306	{	383	{
307	U32 length = get_length ();	384	UV len = get_length ();
308		385
309	if (length <= 0)	386	if (len <= 0)
310	{	387	{
311	error ("OBJECT IDENTIFIER length equal to zero");	388	error ("BER_TYPE_OID length must not be zero");
312	return &PL_sv_undef;	389	return &PL_sv_undef;
313	}	390	}
314		391
315	U8 *end = cur + length;	392	U8 *end = cur + len;
316	U32 w = get_ber ();	393	UV w = get_w ();
317		394
318	static char oid[MAX_OID_STRLEN]; // must be static	395	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
319	char *app = oid;	396	char *app = oid;
320		397
		398	if (relative)
321	app = write_uv (app, (U8)w / 40);	399	app = write_uv (app, w);
		400	else
		401	{
		402	UV w1, w2;
		403
		404	if (w < 2 * 40)
		405	(w1 = w / 40), (w2 = w % 40);
		406	else
		407	(w1 = 2), (w2 = w - 2 * 40);
		408
		409	app = write_uv (app, w1);
322	*app++ = '.';	410	*app++ = '.';
323	app = write_uv (app, (U8)w % 40);	411	app = write_uv (app, w2);
		412	}
324		413
		414	while (cur < end)
		415	{
325	// we assume an oid component is never > 64 bytes	416	// we assume an oid component is never > 64 digits
326	while (cur < end && oid + sizeof (oid) - app > 64)	417	if (oid + sizeof (oid) - app < 64)
327	{	418	croak ("BER_TYPE_OID to long to decode");
		419
328	w = get_ber ();	420	w = get_w ();
329	*app++ = '.';	421	*app++ = '.';
330	app = write_uv (app, w);	422	app = write_uv (app, w);
331	}	423	}
332		424
333	return newSVpvn (oid, app - oid);	425	return newSVpvn (oid, app - oid);
334	}	426	}
335		427
		428	// TODO: this is unacceptably slow
336	static SV *	429	static SV *
		430	decode_ucs (int chrsize)
		431	{
		432	SV *res = NEWSV (0, 0);
		433
		434	UV len = get_length ();
		435
		436	if (len & (chrsize - 1))
		437	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		438
		439	while (len)
		440	{
		441	U8 b1 = get_u8 ();
		442	U8 b2 = get_u8 ();
		443	U32 chr = (b1 << 8) | b2;
		444
		445	if (chrsize == 4)
		446	{
		447	U8 b3 = get_u8 ();
		448	U8 b4 = get_u8 ();
		449	chr = (chr << 16) | (b3 << 8) | b4;
		450	}
		451
		452	U8 uchr [UTF8_MAXBYTES];
		453	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		454
		455	sv_catpvn (res, (const char *)uchr, uclen);
		456	len -= chrsize;
		457	}
		458
		459	SvUTF8_on (res);
		460
		461	return res;
		462	}
		463
		464	static SV *
337	decode_ber ()	465	decode_ber (void)
338	{	466	{
339	int identifier = get_u8 ();	467	int identifier = get_u8 ();
340		468
341	SV *res;	469	SV *res;
342		470
343	int constructed = identifier & ASN_CONSTRUCTED;	471	int constructed = identifier & ASN_CONSTRUCTED;
344	int klass = identifier & ASN_CLASS_MASK;	472	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
345	int tag = identifier & ASN_TAG_MASK;	473	int tag = identifier & ASN_TAG_MASK;
346		474
347	if (tag == ASN_TAG_BER)	475	if (tag == ASN_TAG_BER)
348	tag = get_ber ();	476	tag = get_w ();
349
350	if (tag == ASN_TAG_BER)
351	tag = get_ber ();
352		477
353	if (constructed)	478	if (constructed)
354	{	479	{
355	U32 len = get_length ();	480	UV len = get_length ();
356	U32 seqend = (cur - buf) + len;	481	UV seqend = (cur - buf) + len;
357	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	482	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
358		483
359	while (cur < buf + seqend)	484	while (cur < buf + seqend)
360	av_push (av, decode_ber ());	485	av_push (av, decode_ber ());
361		486
362	if (cur > buf + seqend)	487	if (cur > buf + seqend)
363	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	488	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
364		489
365	res = newRV_inc ((SV *)av);	490	res = newRV_inc ((SV *)av);
366	}	491	}
367	else	492	else
368	switch (identifier)	493	switch (profile_lookup (cur_profile, klass, tag))
369	{	494	{
370	case ASN_NULL:	495	case BER_TYPE_NULL:
		496	{
		497	UV len = get_length ();
		498
		499	if (len)
		500	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		501
371	res = &PL_sv_undef;	502	res = &PL_sv_undef;
		503	}
372	break;	504	break;
373		505
374	case ASN_OBJECT_IDENTIFIER:	506	case BER_TYPE_BOOL:
		507	{
		508	UV len = get_length ();
		509
		510	if (len != 1)
		511	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
		512
		513	res = newSVcacheint (!!get_u8 ());
		514	}
		515	break;
		516
		517	case BER_TYPE_OID:
375	res = decode_object_identifier ();	518	res = decode_oid (0);
376	break;	519	break;
377		520
378	case ASN_INTEGER32:	521	case BER_TYPE_RELOID:
		522	res = decode_oid (1);
		523	break;
		524
		525	case BER_TYPE_INT:
379	res = decode_integer32 ();	526	res = decode_int ();
380	break;	527	break;
381		528
382	case ASN_APPLICATION | ASN_UNSIGNED32:	529	case BER_TYPE_UTF8:
383	case ASN_APPLICATION | ASN_COUNTER32:	530	res = decode_data ();
384	case ASN_APPLICATION | ASN_TIMETICKS:	531	SvUTF8_on (res);
		532	break;
		533
		534	case BER_TYPE_BYTES:
		535	res = decode_data ();
		536	break;
		537
		538	case BER_TYPE_IPADDRESS:
		539	{
		540	UV len = get_length ();
		541
		542	if (len != 4)
		543	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		544
		545	U8 *data = get_n (4);
		546	res = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]);
		547	}
		548	break;
		549
		550	case BER_TYPE_UCS2:
		551	res = decode_ucs (2);
		552	break;
		553
		554	case BER_TYPE_UCS4:
385	res = decode_unsigned32 ();	555	res = decode_ucs (4);
386	break;	556	break;
387		557
388	#if 0 // handled by default case	558	case BER_TYPE_REAL:
389	case ASN_OCTET_STRING:	559	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		560
396	case ASN_APPLICATION | ASN_COUNTER64:	561	case BER_TYPE_CROAK:
397	res = decode_integer64 ();	562	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
398	break;
399		563
400	default:	564	default:
401	res = decode_octet_string ();	565	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
402	break;
403	}	566	}
404		567
405	AV *av = newAV ();	568	AV *av = newAV ();
406	av_fill (av, BER_ARRAYSIZE - 1);	569	av_fill (av, BER_ARRAYSIZE - 1);
407	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	570	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
408	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	571	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
409	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	572	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
410	AvARRAY (av)[BER_DATA ] = res;	573	AvARRAY (av)[BER_DATA ] = res;
411		574
412	return newRV_noinc ((SV *)av);	575	return newRV_noinc ((SV *)av);
413	}	576	}
414		577
		578	/////////////////////////////////////////////////////////////////////////////
		579	// encoder
		580
		581	/* adds two STRLENs together, slow, and with paranoia */
		582	static STRLEN
		583	strlen_sum (STRLEN l1, STRLEN l2)
		584	{
		585	size_t sum = l1 + l2;
		586
		587	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		588	croak ("Convert::BER::XS: string size overflow");
		589
		590	return sum;
		591	}
		592
		593	static void
		594	set_buf (SV *sv)
		595	{
		596	STRLEN len;
		597	buf_sv = sv;
		598	buf = (U8 *)SvPVbyte (buf_sv, len);
		599	cur = buf;
		600	end = buf + len;
		601	}
		602
		603	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		604	static char *
		605	my_sv_grow (SV *sv, size_t len1, size_t len2)
		606	{
		607	len1 = strlen_sum (len1, len2);
		608	len1 = strlen_sum (len1, len1 >> 1);
		609
		610	if (len1 > 4096 - 24)
		611	len1 = (len1 | 4095) - 24;
		612
		613	return SvGROW (sv, len1);
		614	}
		615
		616	static void
		617	need (STRLEN len)
		618	{
		619	if (expect_false ((uintptr_t)(end - cur) < len))
		620	{
		621	STRLEN pos = cur - buf;
		622	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		623	cur = buf + pos;
		624	end = buf + SvLEN (buf_sv) - 1;
		625	}
		626	}
		627
		628	static void
		629	put_u8 (int val)
		630	{
		631	need (1);
		632	*cur++ = val;
		633	}
		634
		635	static void
		636	put_w_nocheck (UV val)
		637	{
		638	#if UVSIZE > 4
		639	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		640	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		641	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		642	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		643	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		644	#endif
		645	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		646	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		647	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		648	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		649	*cur = val & 0x7f; cur += 1;
		650	}
		651
		652	static void
		653	put_w (UV val)
		654	{
		655	need (5); // we only handle up to 5 bytes
		656
		657	put_w_nocheck (val);
		658	}
		659
		660	static U8 *
		661	put_length_at (UV val, U8 *cur)
		662	{
		663	if (val <= 0x7fU)
		664	*cur++ = val;
		665	else
		666	{
		667	U8 *lenb = cur++;
		668
		669	#if UVSIZE > 4
		670	*cur = val >> 56; cur += val >= ((UV)1 << (8 * 7));
		671	*cur = val >> 48; cur += val >= ((UV)1 << (8 * 6));
		672	*cur = val >> 40; cur += val >= ((UV)1 << (8 * 5));
		673	*cur = val >> 32; cur += val >= ((UV)1 << (8 * 4));
		674	#endif
		675	*cur = val >> 24; cur += val >= ((UV)1 << (8 * 3));
		676	*cur = val >> 16; cur += val >= ((UV)1 << (8 * 2));
		677	*cur = val >> 8; cur += val >= ((UV)1 << (8 * 1));
		678	*cur = val ; cur += 1;
		679
		680	*lenb = 0x80 + cur - lenb - 1;
		681	}
		682
		683	return cur;
		684	}
		685
		686	static void
		687	put_length (UV val)
		688	{
		689	need (9 + val);
		690	cur = put_length_at (val, cur);
		691	}
		692
		693	// return how many bytes the encoded length requires
		694	static int length_length (UV val)
		695	{
		696	// use hashing with a DeBruin sequence, anyone?
		697	return expect_true (val <= 0x7fU)
		698	? 1
		699	: 2
		700	+ (val > 0x000000000000ffU)
		701	+ (val > 0x0000000000ffffU)
		702	+ (val > 0x00000000ffffffU)
		703	#if UVSIZE > 4
		704	+ (val > 0x000000ffffffffU)
		705	+ (val > 0x0000ffffffffffU)
		706	+ (val > 0x00ffffffffffffU)
		707	+ (val > 0xffffffffffffffU)
		708	#endif
		709	;
		710	}
		711
		712	static void
		713	encode_data (const char *ptr, STRLEN len)
		714	{
		715	put_length (len);
		716	memcpy (cur, ptr, len);
		717	cur += len;
		718	}
		719
		720	static void
		721	encode_uv (UV uv)
		722	{
		723	}
		724
		725	static void
		726	encode_int (SV *sv)
		727	{
		728	need (8 + 1 + 1); // 64 bit + length + extra 0
		729
		730	if (expect_false (!SvIOK (sv)))
		731	sv_2iv_flags (sv, 0);
		732
		733	U8 *lenb = cur++;
		734
		735	if (SvIOK_notUV (sv))
		736	{
		737	IV iv = SvIVX (sv);
		738
		739	if (expect_false (iv < 0))
		740	{
		741	// get two's complement bit pattern - works even on hypothetical non-2c machines
		742	UV uv = iv;
		743
		744	#if UVSIZE > 4
		745	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		746	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		747	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		748	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		749	#endif
		750	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		751	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		752	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		753	*cur = uv ; cur += 1;
		754
		755	*lenb = cur - lenb - 1;
		756
		757	return;
		758	}
		759	}
		760
		761	UV uv = SvUV (sv);
		762
		763	// prepend an extra 0 if the high bit is 1
		764	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		765
		766	#if UVSIZE > 4
		767	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		768	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		769	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		770	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		771	#endif
		772	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		773	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		774	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		775	*cur = uv ; cur += 1;
		776
		777	*lenb = cur - lenb - 1;
		778	}
		779
		780	// we don't know the length yet, so we optimistically
		781	// assume the length will need one octet later. If that
		782	// turns out to be wrong, we memmove as needed.
		783	// mark the beginning
		784	static STRLEN
		785	len_fixup_mark (void)
		786	{
		787	return cur++ - buf;
		788	}
		789
		790	// patch up the length
		791	static void
		792	len_fixup (STRLEN mark)
		793	{
		794	STRLEN reallen = (cur - buf) - mark - 1;
		795	int lenlen = length_length (reallen);
		796
		797	if (expect_false (lenlen > 1))
		798	{
		799	// bad luck, we have to shift the bytes to make room for the length
		800	need (5);
		801	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		802	cur += lenlen - 1;
		803	}
		804
		805	put_length_at (reallen, buf + mark);
		806	}
		807
		808	static char *
		809	read_uv (char *str, UV *uv)
		810	{
		811	UV r = 0;
		812
		813	while (*str >= '0')
		814	r = r * 10 + *str++ - '0';
		815
		816	*uv = r;
		817
		818	str += !!*str; // advance over any non-zero byte
		819
		820	return str;
		821	}
		822
		823	static void
		824	encode_oid (SV *oid, int relative)
		825	{
		826	STRLEN len;
		827	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		828
		829	// we need at most as many octets as the string form
		830	need (len + 1);
		831	STRLEN mark = len_fixup_mark ();
		832
		833	UV w1, w2;
		834
		835	if (!relative)
		836	{
		837	ptr = read_uv (ptr, &w1);
		838	ptr = read_uv (ptr, &w2);
		839
		840	put_w_nocheck (w1 * 40 + w2);
		841	}
		842
		843	while (*ptr)
		844	{
		845	ptr = read_uv (ptr, &w1);
		846	put_w_nocheck (w1);
		847	}
		848
		849	len_fixup (mark);
		850	}
		851
		852	// check whether an SV is a BER tuple and returns its AV *
		853	static AV *
		854	ber_tuple (SV *tuple)
		855	{
		856	SV *rv;
		857
		858	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		859	croak ("BER tuple must be array-reference");
		860
		861	if (expect_false (SvRMAGICAL (rv)))
		862	croak ("BER tuple must not be tied");
		863
		864	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		865	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		866
		867	return (AV *)rv;
		868	}
		869
		870	static void
		871	encode_ucs (SV *data, int chrsize)
		872	{
		873	STRLEN uchars = sv_len_utf8 (data);
		874	STRLEN len;;
		875	char *ptr = SvPVutf8 (data, len);
		876
		877	put_length (uchars * chrsize);
		878
		879	while (uchars--)
		880	{
		881	STRLEN uclen;
		882	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		883
		884	ptr += uclen;
		885	len -= uclen;
		886
		887	if (chrsize == 4)
		888	{
		889	*cur++ = uchr >> 24;
		890	*cur++ = uchr >> 16;
		891	}
		892
		893	*cur++ = uchr >> 8;
		894	*cur++ = uchr;
		895	}
		896	}
		897	static void
		898	encode_ber (SV *tuple)
		899	{
		900	AV *av = ber_tuple (tuple);
		901
		902	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		903	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		904	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		905	SV *data = AvARRAY (av)[BER_DATA];
		906
		907	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		908
		909	if (expect_false (tag >= ASN_TAG_BER))
		910	{
		911	put_u8 (identifier | ASN_TAG_BER);
		912	put_w (tag);
		913	}
		914	else
		915	put_u8 (identifier | tag);
		916
		917	if (constructed)
		918	{
		919	// we optimistically assume that only one length byte is needed
		920	// and adjust later
		921	need (1);
		922	STRLEN mark = len_fixup_mark ();
		923
		924	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		925	croak ("BER CONSTRUCTED data must be array-reference");
		926
		927	AV *av = (AV *)SvRV (data);
		928	int fill = AvFILL (av);
		929
		930	if (expect_false (SvRMAGICAL (av)))
		931	croak ("BER CONSTRUCTED data must not be tied");
		932
		933	int i;
		934	for (i = 0; i <= fill; ++i)
		935	encode_ber (AvARRAY (av)[i]);
		936
		937	len_fixup (mark);
		938	}
		939	else
		940	switch (profile_lookup (cur_profile, klass, tag))
		941	{
		942	case BER_TYPE_NULL:
		943	put_length (0);
		944	break;
		945
		946	case BER_TYPE_BOOL:
		947	put_length (1);
		948	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		949	break;
		950
		951	case BER_TYPE_OID:
		952	encode_oid (data, 0);
		953	break;
		954
		955	case BER_TYPE_RELOID:
		956	encode_oid (data, 1);
		957	break;
		958
		959	case BER_TYPE_INT:
		960	encode_int (data);
		961	break;
		962
		963	case BER_TYPE_BYTES:
		964	{
		965	STRLEN len;
		966	const char *ptr = SvPVbyte (data, len);
		967	encode_data (ptr, len);
		968	}
		969	break;
		970
		971	case BER_TYPE_UTF8:
		972	{
		973	STRLEN len;
		974	const char *ptr = SvPVutf8 (data, len);
		975	encode_data (ptr, len);
		976	}
		977	break;
		978
		979	case BER_TYPE_IPADDRESS:
		980	{
		981	U8 ip[4];
		982	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		983	encode_data ((const char *)ip, sizeof (ip));
		984	}
		985	break;
		986
		987	case BER_TYPE_UCS2:
		988	encode_ucs (data, 2);
		989	break;
		990
		991	case BER_TYPE_UCS4:
		992	encode_ucs (data, 4);
		993	break;
		994
		995	case BER_TYPE_REAL:
		996	croak ("BER_TYPE_REAL not implemented");
		997
		998	case BER_TYPE_CROAK:
		999	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		1000
		1001	default:
		1002	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		1003	}
		1004
		1005	}
		1006
		1007	/////////////////////////////////////////////////////////////////////////////
		1008
415	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1009	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
416		1010
417	PROTOTYPES: ENABLE	1011	PROTOTYPES: ENABLE
418		1012
419	BOOT:	1013	BOOT:
420	{	1014	{
421	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1015	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1016
		1017	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
422		1018
423	static const struct {	1019	static const struct {
424	const char *name;	1020	const char *name;
425	IV iv;	1021	IV iv;
426	} *civ, const_iv[] = {	1022	} *civ, const_iv[] = {
427	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1023	#define const_iv(name) { # name, name },
428	{ "ASN_INTEGER32", ASN_INTEGER32 },	1024	const_iv (ASN_BOOLEAN)
429	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1025	const_iv (ASN_INTEGER)
430	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1026	const_iv (ASN_BIT_STRING)
431	{ "ASN_NULL", ASN_NULL },	1027	const_iv (ASN_OCTET_STRING)
432	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1028	const_iv (ASN_NULL)
433	{ "ASN_TAG_BER", ASN_TAG_BER },	1029	const_iv (ASN_OBJECT_IDENTIFIER)
434	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1030	const_iv (ASN_OBJECT_DESCRIPTOR)
435	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1031	const_iv (ASN_OID)
436	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1032	const_iv (ASN_EXTERNAL)
437	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1033	const_iv (ASN_REAL)
438	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1034	const_iv (ASN_SEQUENCE)
439	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1035	const_iv (ASN_ENUMERATED)
440	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1036	const_iv (ASN_EMBEDDED_PDV)
441	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1037	const_iv (ASN_UTF8_STRING)
442	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1038	const_iv (ASN_RELATIVE_OID)
443	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1039	const_iv (ASN_SET)
444	{ "ASN_COUNTER32", ASN_COUNTER32 },	1040	const_iv (ASN_NUMERIC_STRING)
445	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1041	const_iv (ASN_PRINTABLE_STRING)
446	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1042	const_iv (ASN_TELETEX_STRING)
447	{ "ASN_OPAQUE", ASN_OPAQUE },	1043	const_iv (ASN_T61_STRING)
448	{ "ASN_COUNTER64", ASN_COUNTER64 },	1044	const_iv (ASN_VIDEOTEX_STRING)
		1045	const_iv (ASN_IA5_STRING)
		1046	const_iv (ASN_ASCII_STRING)
		1047	const_iv (ASN_UTC_TIME)
		1048	const_iv (ASN_GENERALIZED_TIME)
		1049	const_iv (ASN_GRAPHIC_STRING)
		1050	const_iv (ASN_VISIBLE_STRING)
		1051	const_iv (ASN_ISO646_STRING)
		1052	const_iv (ASN_GENERAL_STRING)
		1053	const_iv (ASN_UNIVERSAL_STRING)
		1054	const_iv (ASN_CHARACTER_STRING)
		1055	const_iv (ASN_BMP_STRING)
449		1056
450	{ "BER_CLASS" , BER_CLASS },	1057	const_iv (ASN_UNIVERSAL)
451	{ "BER_TAG" , BER_TAG },	1058	const_iv (ASN_APPLICATION)
452	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1059	const_iv (ASN_CONTEXT)
453	{ "BER_DATA" , BER_DATA },	1060	const_iv (ASN_PRIVATE)
		1061
		1062	const_iv (BER_CLASS)
		1063	const_iv (BER_TAG)
		1064	const_iv (BER_FLAGS)
		1065	const_iv (BER_DATA)
		1066
		1067	const_iv (BER_TYPE_BYTES)
		1068	const_iv (BER_TYPE_UTF8)
		1069	const_iv (BER_TYPE_UCS2)
		1070	const_iv (BER_TYPE_UCS4)
		1071	const_iv (BER_TYPE_INT)
		1072	const_iv (BER_TYPE_OID)
		1073	const_iv (BER_TYPE_RELOID)
		1074	const_iv (BER_TYPE_NULL)
		1075	const_iv (BER_TYPE_BOOL)
		1076	const_iv (BER_TYPE_REAL)
		1077	const_iv (BER_TYPE_IPADDRESS)
		1078	const_iv (BER_TYPE_CROAK)
		1079
		1080	const_iv (SNMP_IPADDRESS)
		1081	const_iv (SNMP_COUNTER32)
		1082	const_iv (SNMP_GAUGE32)
		1083	const_iv (SNMP_UNSIGNED32)
		1084	const_iv (SNMP_TIMETICKS)
		1085	const_iv (SNMP_OPAQUE)
		1086	const_iv (SNMP_COUNTER64)
454	};	1087	};
455		1088
456	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1089	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));	1090	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
458	}	1091	}
459		1092
460	SV *	1093	void
461	ber_decode (SV *ber)	1094	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1095	ALIAS:
		1096	ber_decode_prefix = 1
462	CODE:	1097	PPCODE:
463	{	1098	{
		1099	cur_profile = SvPROFILE (profile);
		1100	STRLEN len;
464	buf = SvPVbyte (ber, len);	1101	buf = (U8 *)SvPVbyte (ber, len);
465	cur = buf;	1102	cur = buf;
466	rem = len;	1103	end = buf + len;
467		1104
468	RETVAL = decode_ber ();	1105	SV *tuple = decode_ber ();
		1106
		1107	EXTEND (SP, 2);
		1108	PUSHs (sv_2mortal (tuple));
		1109
		1110	if (ix)
		1111	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1112	else if (cur != end)
		1113	error ("trailing garbage after BER value");
469	}	1114	}
470	OUTPUT: RETVAL
471		1115
472	void	1116	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)	1117	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:	1118	PPCODE:
476	{	1119	{
477	if (!SvOK (tuple))	1120	if (!SvOK (tuple))
478	XSRETURN_NO;	1121	XSRETURN_NO;
479		1122
480	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1123	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
481	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1124	croak ("ber_is: tuple must be BER tuple (array-ref)");
482		1125
483	AV *av = (AV *)SvRV (tuple);	1126	AV *av = (AV *)SvRV (tuple);
484		1127
485	XPUSHs (	1128	XPUSHs (
486	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1129	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
487	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1130	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
488	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1131	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
489	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1132	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
490	? &PL_sv_yes : &PL_sv_no);	1133	? &PL_sv_yes : &PL_sv_undef);
491	}	1134	}
492		1135
493	void	1136	void
494	ber_is_seq (SV *tuple)	1137	ber_is_seq (SV *tuple)
495	PROTOTYPE: $
496	PPCODE:	1138	PPCODE:
497	{	1139	{
498	if (!SvOK (tuple))	1140	if (!SvOK (tuple))
499	XSRETURN_UNDEF;	1141	XSRETURN_UNDEF;
500		1142
501	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1143	AV *av = ber_tuple (tuple);
502	croak ("ber_seq: tuple must be ber tuple (array-ref)");
503
504	AV *av = (AV *)SvRV (tuple);
505		1144
506	XPUSHs (	1145	XPUSHs (
507	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1146	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
508	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1147	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
509	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1148	&& SvIV (AvARRAY (av)[BER_FLAGS])
510	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1149	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
511	}	1150	}
512		1151
513	void	1152	void
514	ber_is_i32 (SV *tuple, IV value)	1153	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
515	PROTOTYPE: $$
516	PPCODE:	1154	PPCODE:
517	{	1155	{
518	if (!SvOK (tuple))	1156	if (!SvOK (tuple))
519	XSRETURN_NO;	1157	XSRETURN_NO;
520		1158
521	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1159	AV *av = ber_tuple (tuple);
522	croak ("ber_seq: tuple must be ber tuple (array-ref)");
523		1160
524	AV *av = (AV *)SvRV (tuple);	1161	UV data = SvUV (AvARRAY (av)[BER_DATA]);
525		1162
526	XPUSHs (	1163	XPUSHs (
527	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1164	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
528	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1165	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
529	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1166	&& !SvIV (AvARRAY (av)[BER_FLAGS])
530	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1167	&& (!SvOK (value) || data == SvUV (value))
531	? &PL_sv_yes : &PL_sv_no);	1168	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1169	: &PL_sv_undef);
532	}	1170	}
533		1171
534	void	1172	void
535	ber_is_oid (SV *tuple, SV *oid)	1173	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
536	PROTOTYPE: $$
537	PPCODE:	1174	PPCODE:
538	{	1175	{
539	if (!SvOK (tuple))	1176	if (!SvOK (tuple))
540	XSRETURN_NO;	1177	XSRETURN_NO;
541		1178
542	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1179	AV *av = ber_tuple (tuple);
543	croak ("ber_seq: tuple must be ber tuple (array-ref)");
544
545	AV *av = (AV *)SvRV (tuple);
546		1180
547	XPUSHs (	1181	XPUSHs (
548	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1182	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
549	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1183	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
550	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1184	&& !SvIV (AvARRAY (av)[BER_FLAGS])
551	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1185	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
552	? &PL_sv_yes : &PL_sv_no);	1186	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
553	}	1187	}
554		1188
		1189	#############################################################################
		1190
		1191	void
		1192	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1193	PPCODE:
		1194	{
		1195	cur_profile = SvPROFILE (profile);
		1196	buf_sv = sv_2mortal (NEWSV (0, 256));
		1197	SvPOK_only (buf_sv);
		1198	set_buf (buf_sv);
		1199
		1200	encode_ber (tuple);
		1201
		1202	SvCUR_set (buf_sv, cur - buf);
		1203	XPUSHs (buf_sv);
		1204	}
		1205
		1206	SV *
		1207	ber_int (SV *sv)
		1208	CODE:
		1209	{
		1210	AV *av = newAV ();
		1211	av_fill (av, BER_ARRAYSIZE - 1);
		1212	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1213	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1214	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1215	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1216	RETVAL = newRV_noinc ((SV *)av);
		1217	}
		1218	OUTPUT: RETVAL
		1219
		1220	# TODO: not arrayref, but elements?
		1221	SV *
		1222	ber_seq (SV *arrayref)
		1223	CODE:
		1224	{
		1225	AV *av = newAV ();
		1226	av_fill (av, BER_ARRAYSIZE - 1);
		1227	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1228	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1229	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1230	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1231	RETVAL = newRV_noinc ((SV *)av);
		1232	}
		1233	OUTPUT: RETVAL
		1234
		1235	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1236
		1237	SV *
		1238	new (SV *klass)
		1239	CODE:
		1240	RETVAL = profile_new ();
		1241	OUTPUT: RETVAL
		1242
		1243	void
		1244	set (SV *profile, int klass, int tag, int type)
		1245	CODE:
		1246	profile_set (SvPROFILE (profile), klass, tag, type);
		1247
		1248	IV
		1249	get (SV *profile, int klass, int tag)
		1250	CODE:
		1251	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1252	OUTPUT: RETVAL
		1253
		1254	void
		1255	_set_default (SV *profile)
		1256	CODE:
		1257	default_profile = SvPROFILE (profile);
		1258
		1259

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