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Comparing Convert-BER-XS/XS.xs (file contents):
Revision 1.1 by root, Fri Apr 19 16:19:36 2019 UTC vs.
Revision 1.31 by root, Tue Apr 23 21:03:12 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,
		21	ASN_REAL = 0x09,
		22	ASN_ENUMERATED = 0x0a,
		23	ASN_EMBEDDED_PDV = 0x0b,
		24	ASN_UTF8_STRING = 0x0c,
		25	ASN_RELATIVE_OID = 0x0d,
15	ASN_SEQUENCE = 0x10,	26	ASN_SEQUENCE = 0x10,
		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,
		35	ASN_UTC_TIME = 0x17,
		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,
16		44
17	ASN_TAG_BER = 0x1f,	45	ASN_TAG_BER = 0x1f,
18	ASN_TAG_MASK = 0x1f,	46	ASN_TAG_MASK = 0x1f,
19		47
20	// primitive/constructed	48	// primitive/constructed
21	ASN_CONSTRUCTED = 0x20,	49	ASN_CONSTRUCTED = 0x20,
22		50
23	// ASN_CLASS	51	// ASN_CLASS
24	ASN_UNIVERSAL = 0x00,	52	ASN_UNIVERSAL = 0x00,
25	ASN_APPLICATION = 0x40,	53	ASN_APPLICATION = 0x01,
26	ASN_CONTEXT = 0x80,	54	ASN_CONTEXT = 0x02,
27	ASN_PRIVATE = 0xc0,	55	ASN_PRIVATE = 0x03,
28		56
29	ASN_CLASS_MASK = 0xc0,	57	ASN_CLASS_MASK = 0xc0,
30	ASN_CLASS_SHIFT = 6,	58	ASN_CLASS_SHIFT = 6,
31		59
32	// ASN_APPLICATION	60	// ASN_APPLICATION SNMP
33	ASN_IPADDRESS = 0x00,	61	SNMP_IPADDRESS = 0x00,
34	ASN_COUNTER32 = 0x01,	62	SNMP_COUNTER32 = 0x01,
		63	SNMP_GAUGE32 = 0x02,
35	ASN_UNSIGNED32 = 0x02,	64	SNMP_UNSIGNED32 = 0x02,
36	ASN_TIMETICKS = 0x03,	65	SNMP_TIMETICKS = 0x03,
37	ASN_OPAQUE = 0x04,	66	SNMP_OPAQUE = 0x04,
38	ASN_COUNTER64 = 0x06,	67	SNMP_COUNTER64 = 0x06,
39	};	68	};
40		69
		70	// tlow-level types this module can ecode the above (and more) into
41	enum {	71	enum {
		72	BER_TYPE_BYTES,
		73	BER_TYPE_UTF8,
		74	BER_TYPE_UCS2,
		75	BER_TYPE_UCS4,
		76	BER_TYPE_INT,
		77	BER_TYPE_OID,
		78	BER_TYPE_RELOID,
		79	BER_TYPE_NULL,
		80	BER_TYPE_BOOL,
		81	BER_TYPE_REAL,
		82	BER_TYPE_IPADDRESS,
		83	BER_TYPE_CROAK,
		84	};
		85
		86	// tuple array indices
		87	enum {
42	BER_CLASS = 0,	88	BER_CLASS = 0,
43	BER_TAG = 1,	89	BER_TAG = 1,
44	BER_CONSTRUCTED = 2,	90	BER_FLAGS = 2,
45	BER_DATA = 3,	91	BER_DATA = 3,
46	BER_ARRAYSIZE	92	BER_ARRAYSIZE
47	};	93	};
48		94
49	#define MAX_OID_STRLEN 4096	95	#define MAX_OID_STRLEN 4096
50		96
51	static U8 *buf, *cur;	97	typedef void profile_type;
52	static STRLEN len, rem;	98
		99	static profile_type *cur_profile, *default_profile;
		100	static SV *buf_sv; // encoding buffer
		101	static U8 *buf, *cur, *end; // buffer start, current, end
		102
		103	#if PERL_VERSION < 18
		104	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
		105	#endif
		106
		107	#if __GNUC__ >= 3
		108	# define expect(expr,value) __builtin_expect ((expr), (value))
		109	# define INLINE static inline
		110	#else
		111	# define expect(expr,value) (expr)
		112	# define INLINE static
		113	#endif
		114
		115	#define expect_false(expr) expect ((expr) != 0, 0)
		116	#define expect_true(expr) expect ((expr) != 0, 1)
		117
		118	/////////////////////////////////////////////////////////////////////////////
		119
		120	static SV *sviv_cache[32];
53		121
54	// for "small" integers, return a readonly sv, otherwise create a new one	122	// for "small" integers, return a readonly sv, otherwise create a new one
55	static SV *newSVcacheint (int val)	123	static SV *newSVcacheint (int val)
56	{	124	{
57	static SV *cache[32];
58
59	if (val < 0 || val >= sizeof (cache))	125	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
60	return newSViv (val);	126	return newSViv (val);
61		127
62	if (!cache [val])	128	if (expect_false (!sviv_cache [val]))
63	{	129	{
64	cache [val] = newSVuv (val);	130	sviv_cache [val] = newSVuv (val);
65	SvREADONLY_on (cache [val]);	131	SvREADONLY_on (sviv_cache [val]);
66	}	132	}
67		133
68	return SvREFCNT_inc_NN (cache [val]);	134	return SvREFCNT_inc_NN (sviv_cache [val]);
69	}	135	}
70		136
71	/////////////////////////////////////////////////////////////////////////////	137	/////////////////////////////////////////////////////////////////////////////
72		138
		139	static HV *profile_stash;
		140
		141	static profile_type *
		142	SvPROFILE (SV *profile)
		143	{
		144	if (!SvOK (profile))
		145	return default_profile;
		146
		147	if (!SvROK (profile))
		148	croak ("Convert::BER::XS::Profile expected");
		149
		150	profile = SvRV (profile);
		151
		152	if (SvSTASH (profile) != profile_stash)
		153	croak ("Convert::BER::XS::Profile expected");
		154
		155	return (void *)profile;
		156	}
		157
		158	static int
		159	profile_lookup (profile_type *profile, int klass, int tag)
		160	{
		161	SV *sv = (SV *)profile;
		162	U32 idx = (tag << 2) + klass;
		163
		164	if (expect_false (idx >= SvCUR (sv)))
		165	return BER_TYPE_BYTES;
		166
		167	return SvPVX (sv)[idx];
		168	}
		169
		170	static void
		171	profile_set (profile_type *profile, int klass, int tag, int type)
		172	{
		173	SV *sv = (SV *)profile;
		174	U32 idx = (tag << 2) + klass;
		175	STRLEN oldlen = SvCUR (sv);
		176	STRLEN newlen = idx + 2;
		177
		178	if (idx >= oldlen)
		179	{
		180	sv_grow (sv, newlen);
		181	memset (SvPVX (sv) + oldlen, BER_TYPE_BYTES, newlen - oldlen);
		182	SvCUR_set (sv, newlen);
		183	}
		184
		185	SvPVX (sv)[idx] = type;
		186	}
		187
		188	static SV *
		189	profile_new (void)
		190	{
		191	SV *sv = newSVpvn ("", 0);
		192
		193	static const struct {
		194	int klass;
		195	int tag;
		196	int type;
		197	} *celem, default_map[] = {
		198	{ ASN_UNIVERSAL, ASN_BOOLEAN , BER_TYPE_BOOL },
		199	{ ASN_UNIVERSAL, ASN_INTEGER , BER_TYPE_INT },
		200	{ ASN_UNIVERSAL, ASN_NULL , BER_TYPE_NULL },
		201	{ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, BER_TYPE_OID },
		202	{ ASN_UNIVERSAL, ASN_RELATIVE_OID , BER_TYPE_RELOID },
		203	{ ASN_UNIVERSAL, ASN_REAL , BER_TYPE_REAL },
		204	{ ASN_UNIVERSAL, ASN_ENUMERATED , BER_TYPE_INT },
		205	{ ASN_UNIVERSAL, ASN_UTF8_STRING , BER_TYPE_UTF8 },
		206	{ ASN_UNIVERSAL, ASN_BMP_STRING , BER_TYPE_UCS2 },
		207	{ ASN_UNIVERSAL, ASN_UNIVERSAL_STRING , BER_TYPE_UCS4 },
		208	};
		209
		210	for (celem = default_map + sizeof (default_map) / sizeof (default_map [0]); celem-- > default_map; )
		211	profile_set ((profile_type *)sv, celem->klass, celem->tag, celem->type);
		212
		213	return sv_bless (newRV_noinc (sv), profile_stash);
		214	}
		215
		216	/////////////////////////////////////////////////////////////////////////////
		217	// decoder
		218
73	static void	219	static void
74	error (const char *errmsg)	220	error (const char *errmsg)
75	{	221	{
76	croak ("%s at offset 0x%04x", errmsg, cur - buf);	222	croak ("%s at offset 0x%04x", errmsg, cur - buf);
77	}	223	}
78		224
79	static int	225	static void
80	need (int count)	226	want (UV count)
81	{	227	{
82	if (count < 0 || (int)rem < count)	228	if (expect_false ((uintptr_t)(end - cur) < count))
83	{
84	error ("unexpected end of message buffer");	229	error ("unexpected end of message buffer");
85	return 0;
86	}
87
88	return 1;
89	}	230	}
90		231
		232	// get_* functions fetch something from the buffer
		233	// decode_* functions use get_* fun ctions to decode ber values
		234
		235	// get single octet
		236	static U8
		237	get_u8 (void)
		238	{
		239	if (cur == end)
		240	error ("unexpected end of message buffer");
		241
		242	return *cur++;
		243	}
		244
		245	// get n octets
91	static U8 *	246	static U8 *
92	getn (int count, const U8 *errres)	247	get_n (UV count)
93	{	248	{
94	if (!need (count))	249	want (count);
95	return (U8 *)errres;
96
97	U8 *res = cur;	250	U8 *res = cur;
98
99	cur += count;	251	cur += count;
100	rem -= count;
101
102	return res;	252	return res;
103	}	253	}
104		254
		255	// get ber-encoded integer (i.e. pack "w")
105	static U8	256	static UV
106	get8 (void)	257	get_w (void)
107	{	258	{
108	if (rem <= 0)
109	{
110	error ("unexpected end of message buffer");
111	return 0;
112	}
113
114	rem--;
115	return *cur++;
116	}
117
118	static U32
119	getb (void)
120	{
121	U32 res = 0;	259	UV res = 0;
		260	U8 c = get_u8 ();
		261
		262	if (expect_false (c == 0x80))
		263	error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)");
122		264
123	for (;;)	265	for (;;)
124	{	266	{
125	U8 c = get8 ();	267	if (expect_false (res >> UVSIZE * 8 - 7))
		268	error ("BER variable length integer overflow");
		269
126	res = (res << 7) | (c & 0x7f);	270	res = (res << 7) | (c & 0x7f);
127		271
128	if (!(c & 0x80))	272	if (expect_true (!(c & 0x80)))
129	return res;	273	return res;
130	}
131	}
132		274
		275	c = get_u8 ();
		276	}
		277	}
		278
133	static U32	279	static UV
134	process_length (void)	280	get_length (void)
135	{	281	{
136	U32 res = get8 ();	282	UV res = get_u8 ();
137		283
138	if (res & 0x80)	284	if (expect_false (res & 0x80))
139	{	285	{
140	int cnt = res & 0x7f;	286	U8 cnt = res & 0x7f;
		287
		288	// this genewrates quite ugly code, but the overhead
		289	// of copying the bytes for these lengths is probably so high
		290	// that a slightly inefficient get_length won't matter.
		291
		292	if (expect_false (cnt == 0))
		293	error ("indefinite BER value lengths not supported");
		294
		295	if (expect_false (cnt > UVSIZE))
		296	error ("BER value length too long (must fit into UV) or BER reserved value in length (X.690 8.1.3.5)");
		297
		298	want (cnt);
		299
141	res = 0;	300	res = 0;
142		301	do
143	switch (cnt)	302	res = (res << 8) | *cur++;
144	{	303	while (--cnt);
145	case 0:
146	error ("indefinite ASN.1 lengths not supported");
147	return 0;
148
149	default:
150	error ("ASN.1 length too long");
151	return 0;
152
153	case 4: res = (res << 8) | get8 ();
154	case 3: res = (res << 8) | get8 ();
155	case 2: res = (res << 8) | get8 ();
156	case 1: res = (res << 8) | get8 ();
157	}
158	}	304	}
159		305
160	return res;	306	return res;
161	}	307	}
162		308
163	static U32
164	process_integer32 (void)
165	{
166	U32 length = process_length ();
167
168	if (length <= 0)
169	{
170	error ("INTEGER32 length equal to zero");
171	return 0;
172	}
173
174	U8 *data = getn (length, 0);
175
176	if (!data)
177	return 0;
178
179	if (length > 5 || (length > 4 && data [0]))
180	{
181	error ("INTEGER32 length too long");
182	return 0;
183	}
184
185	U32 res = data [0] & 0x80 ? 0xffffffff : 0;
186
187	while (length--)
188	res = (res << 8) | *data++;
189
190	return res;
191	}
192
193	static SV *	309	static SV *
194	process_integer32_sv (void)	310	decode_int (UV len)
195	{	311	{
196	return newSViv ((I32)process_integer32 ());	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);
197	}	339	}
198		340
199	static SV *	341	static SV *
200	process_unsigned32_sv (void)	342	decode_data (UV len)
201	{	343	{
202	return newSVuv ((U32)process_integer32 ());	344	return newSVpvn ((char *)get_n (len), len);
203	}	345	}
204		346
205	#if IVSIZE >= 8	347	// helper for decode_object_identifier
206
207	static U64TYPE
208	process_integer64 (void)
209	{
210	U32 length = process_length ();
211
212	if (length <= 0)
213	{
214	error ("INTEGER64 length equal to zero");
215	return 0;
216	}
217
218	U8 *data = getn (length, 0);
219
220	if (!data)
221	return 0;
222
223	if (length > 9 || (length > 8 && data [0]))
224	{
225	error ("INTEGER64 length too long");
226	return 0;
227	}
228
229	U64TYPE res = data [0] & 0x80 ? 0xffffffffffffffff : 0;
230
231	while (length--)
232	res = (res << 8) | *data++;
233
234	return res;
235	}
236
237	static SV *
238	process_integer64_sv (void)
239	{
240	return newSViv ((I64TYPE)process_integer64 ());
241	}
242
243	static SV *
244	process_unsigned64_sv (void)
245	{
246	return newSVuv ((U64TYPE)process_integer64 ());
247	}
248
249	#endif
250
251	static SV *
252	process_octet_string_sv (void)
253	{
254	U32 length = process_length ();
255
256	U8 *data = getn (length, 0);
257	if (!data)
258	{
259	error ("OCTET STRING too long");
260	return &PL_sv_undef;
261	}
262
263	return newSVpvn (data, length);
264	}
265
266	static char *	348	static char *
267	write_uv (char *buf, U32 u)	349	write_uv (char *buf, UV u)
268	{	350	{
269	// the one-digit case is absolutely predominant, so this pays off (hopefully)	351	// the one-digit case is absolutely predominant, so this pays off (hopefully)
270	if (u < 10)	352	if (expect_true (u < 10))
271	*buf++ = u + '0';	353	*buf++ = u + '0';
272	else	354	else
273	{	355	{
		356	// this *could* be done much faster using branchless fixed-point arithmetics
274	char *beg = buf;	357	char *beg = buf;
275		358
276	do	359	do
277	{	360	{
278	*buf++ = u % 10 + '0';	361	*buf++ = u % 10 + '0';
279	u /= 10;	362	u /= 10;
280	}	363	}
281	while (u);	364	while (u);
282		365
283	// reverse digits	366	// reverse digits
284	for (char *ptr = buf; --ptr != beg; ++beg)	367	char *ptr = buf;
		368	while (--ptr > beg)
285	{	369	{
286	char c = *ptr;	370	char c = *ptr;
287	*ptr = *beg;	371	*ptr = *beg;
288	*beg = c;	372	*beg = c;
		373	++beg;
289	}	374	}
290	}	375	}
291		376
292	return buf;	377	return buf;
293	}	378	}
294		379
295	static SV *	380	static SV *
296	process_object_identifier_sv (void)	381	decode_oid (UV len, int relative)
297	{	382	{
298	U32 length = process_length ();
299
300	if (length <= 0)	383	if (len <= 0)
301	{	384	{
302	error ("OBJECT IDENTIFIER length equal to zero");	385	error ("BER_TYPE_OID length must not be zero");
303	return &PL_sv_undef;	386	return &PL_sv_undef;
304	}	387	}
305		388
306	U8 *end = cur + length;	389	U8 *end = cur + len;
307	U32 w = getb ();	390	UV w = get_w ();
308		391
309	static char oid[MAX_OID_STRLEN]; // must be static	392	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
310	char *app = oid;	393	char *app = oid;
311		394
		395	if (relative)
312	app = write_uv (app, (U8)w / 40);	396	app = write_uv (app, w);
		397	else
		398	{
		399	UV w1, w2;
		400
		401	if (w < 2 * 40)
		402	(w1 = w / 40), (w2 = w % 40);
		403	else
		404	(w1 = 2), (w2 = w - 2 * 40);
		405
		406	app = write_uv (app, w1);
313	*app++ = '.';	407	*app++ = '.';
314	app = write_uv (app, (U8)w % 40);	408	app = write_uv (app, w2);
		409	}
315		410
		411	while (cur < end)
		412	{
316	// we assume an oid component is never > 64 bytes	413	// we assume an oid component is never > 64 digits
317	while (cur < end && oid + sizeof (oid) - app > 64)	414	if (oid + sizeof (oid) - app < 64)
318	{	415	croak ("BER_TYPE_OID to long to decode");
		416
319	w = getb ();	417	w = get_w ();
320	*app++ = '.';	418	*app++ = '.';
321	app = write_uv (app, w);	419	app = write_uv (app, w);
322	}	420	}
323		421
324	return newSVpvn (oid, app - oid);	422	return newSVpvn (oid, app - oid);
325	}	423	}
326		424
		425	// TODO: this is unacceptably slow
327	static SV *	426	static SV *
328	ber_decode ()	427	decode_ucs (UV len, int chrsize)
329	{	428	{
		429	if (len & (chrsize - 1))
		430	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		431
		432	SV *res = NEWSV (0, 0);
		433
		434	while (len)
		435	{
		436	U8 b1 = get_u8 ();
		437	U8 b2 = get_u8 ();
		438	U32 chr = (b1 << 8) | b2;
		439
		440	if (chrsize == 4)
		441	{
		442	U8 b3 = get_u8 ();
		443	U8 b4 = get_u8 ();
		444	chr = (chr << 16) | (b3 << 8) | b4;
		445	}
		446
		447	U8 uchr [UTF8_MAXBYTES];
		448	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		449
		450	sv_catpvn (res, (const char *)uchr, uclen);
		451	len -= chrsize;
		452	}
		453
		454	SvUTF8_on (res);
		455
		456	return res;
		457	}
		458
		459	static SV *
		460	decode_ber (void)
		461	{
330	int identifier = get8 ();	462	int identifier = get_u8 ();
331		463
332	SV *res;	464	SV *res;
333		465
334	int constructed = identifier & ASN_CONSTRUCTED;	466	int constructed = identifier & ASN_CONSTRUCTED;
335	int klass = identifier & ASN_CLASS_MASK;	467	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
336	int tag = identifier & ASN_TAG_MASK;	468	int tag = identifier & ASN_TAG_MASK;
337		469
338	if (tag == ASN_TAG_BER)	470	if (tag == ASN_TAG_BER)
339	tag = getb ();	471	tag = get_w ();
340
341	if (tag == ASN_TAG_BER)
342	tag = getb ();
343		472
344	if (constructed)	473	if (constructed)
345	{	474	{
346	U32 len = process_length ();	475	want (1);
347	U32 seqend = (cur - buf) + len;
348	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	476	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
349		477
		478	if (expect_false (*cur == 0x80))
		479	{
		480	// indefinite length
		481	++cur;
		482
		483	for (;;)
		484	{
		485	want (2);
		486	if (!cur [0] && !cur [1])
		487	{
		488	cur += 2;
		489	break;
		490	}
		491
		492	av_push (av, decode_ber ());
		493	}
		494	}
		495	else
		496	{
		497	UV len = get_length ();
		498	UV seqend = (cur - buf) + len;
		499
350	while (cur < buf + seqend)	500	while (cur < buf + seqend)
351	av_push (av, ber_decode ());	501	av_push (av, decode_ber ());
352		502
353	if (cur > buf + seqend)	503	if (expect_false (cur > buf + seqend))
354	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	504	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
		505	}
355		506
356	res = newRV_inc ((SV *)av);	507	res = newRV_inc ((SV *)av);
357	}	508	}
358	else	509	else
359	switch (identifier)	510	{
		511	UV len = get_length ();
		512
		513	switch (profile_lookup (cur_profile, klass, tag))
360	{	514	{
361	case ASN_NULL:	515	case BER_TYPE_NULL:
		516	if (expect_false (len))
		517	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		518
362	res = &PL_sv_undef;	519	res = &PL_sv_undef;
363	break;	520	break;
364		521
365	case ASN_OBJECT_IDENTIFIER:	522	case BER_TYPE_BOOL:
366	res = process_object_identifier_sv ();	523	if (expect_false (len != 1))
		524	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
		525
		526	res = newSVcacheint (!!get_u8 ());
367	break;	527	break;
368		528
369	case ASN_INTEGER32:	529	case BER_TYPE_OID:
370	res = process_integer32_sv ();	530	res = decode_oid (len, 0);
371	break;	531	break;
372		532
373	case ASN_APPLICATION | ASN_UNSIGNED32:	533	case BER_TYPE_RELOID:
374	case ASN_APPLICATION | ASN_COUNTER32:	534	res = decode_oid (len, 1);
375	case ASN_APPLICATION | ASN_TIMETICKS:
376	res = process_unsigned32_sv ();
377	break;	535	break;
378		536
379	#if 0 // handled by default case	537	case BER_TYPE_INT:
380	case ASN_OCTET_STRING:	538	res = decode_int (len);
381	case ASN_APPLICATION | ASN_IPADDRESS:
382	case ASN_APPLICATION | ASN_OPAQUE:
383	res = process_octet_string_sv ();
384	break;	539	break;
385	#endif
386		540
387	case ASN_APPLICATION | ASN_COUNTER64:	541	case BER_TYPE_UTF8:
388	res = process_integer64_sv ();	542	res = decode_data (len);
		543	SvUTF8_on (res);
389	break;	544	break;
390		545
391	default:	546	case BER_TYPE_BYTES:
392	res = process_octet_string_sv ();	547	res = decode_data (len);
393	break;	548	break;
		549
		550	case BER_TYPE_IPADDRESS:
		551	{
		552	if (len != 4)
		553	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		554
		555	U8 *data = get_n (4);
		556	res = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]);
		557	}
		558	break;
		559
		560	case BER_TYPE_UCS2:
		561	res = decode_ucs (len, 2);
		562	break;
		563
		564	case BER_TYPE_UCS4:
		565	res = decode_ucs (len, 4);
		566	break;
		567
		568	case BER_TYPE_REAL:
		569	error ("BER_TYPE_REAL not implemented");
		570
		571	case BER_TYPE_CROAK:
		572	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		573
		574	default:
		575	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
394	}	576	}
		577	}
395		578
396	AV *av = newAV ();	579	AV *av = newAV ();
397	av_fill (av, BER_ARRAYSIZE - 1);	580	av_fill (av, BER_ARRAYSIZE - 1);
398	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	581	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
399	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	582	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
400	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	583	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
401	AvARRAY (av)[BER_DATA ] = res;	584	AvARRAY (av)[BER_DATA ] = res;
402		585
403	return newRV_noinc ((SV *)av);	586	return newRV_noinc ((SV *)av);
404	}	587	}
405		588
		589	/////////////////////////////////////////////////////////////////////////////
		590	// encoder
		591
		592	/* adds two STRLENs together, slow, and with paranoia */
		593	static STRLEN
		594	strlen_sum (STRLEN l1, STRLEN l2)
		595	{
		596	size_t sum = l1 + l2;
		597
		598	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		599	croak ("Convert::BER::XS: string size overflow");
		600
		601	return sum;
		602	}
		603
		604	static void
		605	set_buf (SV *sv)
		606	{
		607	STRLEN len;
		608	buf_sv = sv;
		609	buf = (U8 *)SvPVbyte (buf_sv, len);
		610	cur = buf;
		611	end = buf + len;
		612	}
		613
		614	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		615	static char *
		616	my_sv_grow (SV *sv, size_t len1, size_t len2)
		617	{
		618	len1 = strlen_sum (len1, len2);
		619	len1 = strlen_sum (len1, len1 >> 1);
		620
		621	if (len1 > 4096 - 24)
		622	len1 = (len1 | 4095) - 24;
		623
		624	return SvGROW (sv, len1);
		625	}
		626
		627	static void
		628	need (STRLEN len)
		629	{
		630	if (expect_false ((uintptr_t)(end - cur) < len))
		631	{
		632	STRLEN pos = cur - buf;
		633	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		634	cur = buf + pos;
		635	end = buf + SvLEN (buf_sv) - 1;
		636	}
		637	}
		638
		639	static void
		640	put_u8 (int val)
		641	{
		642	need (1);
		643	*cur++ = val;
		644	}
		645
		646	static void
		647	put_w_nocheck (UV val)
		648	{
		649	#if UVSIZE > 4
		650	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		651	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		652	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		653	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		654	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		655	#endif
		656	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		657	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		658	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		659	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		660	*cur = val & 0x7f; cur += 1;
		661	}
		662
		663	static void
		664	put_w (UV val)
		665	{
		666	need (5); // we only handle up to 5 bytes
		667
		668	put_w_nocheck (val);
		669	}
		670
		671	static U8 *
		672	put_length_at (UV val, U8 *cur)
		673	{
		674	if (val <= 0x7fU)
		675	*cur++ = val;
		676	else
		677	{
		678	U8 *lenb = cur++;
		679
		680	#if UVSIZE > 4
		681	*cur = val >> 56; cur += val >= ((UV)1 << (8 * 7));
		682	*cur = val >> 48; cur += val >= ((UV)1 << (8 * 6));
		683	*cur = val >> 40; cur += val >= ((UV)1 << (8 * 5));
		684	*cur = val >> 32; cur += val >= ((UV)1 << (8 * 4));
		685	#endif
		686	*cur = val >> 24; cur += val >= ((UV)1 << (8 * 3));
		687	*cur = val >> 16; cur += val >= ((UV)1 << (8 * 2));
		688	*cur = val >> 8; cur += val >= ((UV)1 << (8 * 1));
		689	*cur = val ; cur += 1;
		690
		691	*lenb = 0x80 + cur - lenb - 1;
		692	}
		693
		694	return cur;
		695	}
		696
		697	static void
		698	put_length (UV val)
		699	{
		700	need (9 + val);
		701	cur = put_length_at (val, cur);
		702	}
		703
		704	// return how many bytes the encoded length requires
		705	static int length_length (UV val)
		706	{
		707	// use hashing with a DeBruin sequence, anyone?
		708	return expect_true (val <= 0x7fU)
		709	? 1
		710	: 2
		711	+ (val > 0x000000000000ffU)
		712	+ (val > 0x0000000000ffffU)
		713	+ (val > 0x00000000ffffffU)
		714	#if UVSIZE > 4
		715	+ (val > 0x000000ffffffffU)
		716	+ (val > 0x0000ffffffffffU)
		717	+ (val > 0x00ffffffffffffU)
		718	+ (val > 0xffffffffffffffU)
		719	#endif
		720	;
		721	}
		722
		723	static void
		724	encode_data (const char *ptr, STRLEN len)
		725	{
		726	put_length (len);
		727	memcpy (cur, ptr, len);
		728	cur += len;
		729	}
		730
		731	static void
		732	encode_uv (UV uv)
		733	{
		734	}
		735
		736	static void
		737	encode_int (SV *sv)
		738	{
		739	need (8 + 1 + 1); // 64 bit + length + extra 0
		740
		741	if (expect_false (!SvIOK (sv)))
		742	sv_2iv_flags (sv, 0);
		743
		744	U8 *lenb = cur++;
		745
		746	if (SvIOK_notUV (sv))
		747	{
		748	IV iv = SvIVX (sv);
		749
		750	if (expect_false (iv < 0))
		751	{
		752	// get two's complement bit pattern - works even on hypothetical non-2c machines
		753	UV uv = iv;
		754
		755	#if UVSIZE > 4
		756	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		757	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		758	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		759	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		760	#endif
		761	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		762	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		763	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		764	*cur = uv ; cur += 1;
		765
		766	*lenb = cur - lenb - 1;
		767
		768	return;
		769	}
		770	}
		771
		772	UV uv = SvUV (sv);
		773
		774	// prepend an extra 0 if the high bit is 1
		775	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		776
		777	#if UVSIZE > 4
		778	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		779	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		780	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		781	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		782	#endif
		783	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		784	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		785	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		786	*cur = uv ; cur += 1;
		787
		788	*lenb = cur - lenb - 1;
		789	}
		790
		791	// we don't know the length yet, so we optimistically
		792	// assume the length will need one octet later. If that
		793	// turns out to be wrong, we memmove as needed.
		794	// mark the beginning
		795	static STRLEN
		796	len_fixup_mark (void)
		797	{
		798	return cur++ - buf;
		799	}
		800
		801	// patch up the length
		802	static void
		803	len_fixup (STRLEN mark)
		804	{
		805	STRLEN reallen = (cur - buf) - mark - 1;
		806	int lenlen = length_length (reallen);
		807
		808	if (expect_false (lenlen > 1))
		809	{
		810	// bad luck, we have to shift the bytes to make room for the length
		811	need (5);
		812	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		813	cur += lenlen - 1;
		814	}
		815
		816	put_length_at (reallen, buf + mark);
		817	}
		818
		819	static char *
		820	read_uv (char *str, UV *uv)
		821	{
		822	UV r = 0;
		823
		824	while (*str >= '0')
		825	r = r * 10 + *str++ - '0';
		826
		827	*uv = r;
		828
		829	str += !!*str; // advance over any non-zero byte
		830
		831	return str;
		832	}
		833
		834	static void
		835	encode_oid (SV *oid, int relative)
		836	{
		837	STRLEN len;
		838	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		839
		840	// we need at most as many octets as the string form
		841	need (len + 1);
		842	STRLEN mark = len_fixup_mark ();
		843
		844	UV w1, w2;
		845
		846	if (!relative)
		847	{
		848	ptr = read_uv (ptr, &w1);
		849	ptr = read_uv (ptr, &w2);
		850
		851	put_w_nocheck (w1 * 40 + w2);
		852	}
		853
		854	while (*ptr)
		855	{
		856	ptr = read_uv (ptr, &w1);
		857	put_w_nocheck (w1);
		858	}
		859
		860	len_fixup (mark);
		861	}
		862
		863	// check whether an SV is a BER tuple and returns its AV *
		864	static AV *
		865	ber_tuple (SV *tuple)
		866	{
		867	SV *rv;
		868
		869	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		870	croak ("BER tuple must be array-reference");
		871
		872	if (expect_false (SvRMAGICAL (rv)))
		873	croak ("BER tuple must not be tied");
		874
		875	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		876	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		877
		878	return (AV *)rv;
		879	}
		880
		881	static void
		882	encode_ucs (SV *data, int chrsize)
		883	{
		884	STRLEN uchars = sv_len_utf8 (data);
		885	STRLEN len;;
		886	char *ptr = SvPVutf8 (data, len);
		887
		888	put_length (uchars * chrsize);
		889
		890	while (uchars--)
		891	{
		892	STRLEN uclen;
		893	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		894
		895	ptr += uclen;
		896	len -= uclen;
		897
		898	if (chrsize == 4)
		899	{
		900	*cur++ = uchr >> 24;
		901	*cur++ = uchr >> 16;
		902	}
		903
		904	*cur++ = uchr >> 8;
		905	*cur++ = uchr;
		906	}
		907	}
		908	static void
		909	encode_ber (SV *tuple)
		910	{
		911	AV *av = ber_tuple (tuple);
		912
		913	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		914	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		915	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		916	SV *data = AvARRAY (av)[BER_DATA];
		917
		918	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		919
		920	if (expect_false (tag >= ASN_TAG_BER))
		921	{
		922	put_u8 (identifier | ASN_TAG_BER);
		923	put_w (tag);
		924	}
		925	else
		926	put_u8 (identifier | tag);
		927
		928	if (constructed)
		929	{
		930	// we optimistically assume that only one length byte is needed
		931	// and adjust later
		932	need (1);
		933	STRLEN mark = len_fixup_mark ();
		934
		935	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		936	croak ("BER CONSTRUCTED data must be array-reference");
		937
		938	AV *av = (AV *)SvRV (data);
		939	int fill = AvFILL (av);
		940
		941	if (expect_false (SvRMAGICAL (av)))
		942	croak ("BER CONSTRUCTED data must not be tied");
		943
		944	int i;
		945	for (i = 0; i <= fill; ++i)
		946	encode_ber (AvARRAY (av)[i]);
		947
		948	len_fixup (mark);
		949	}
		950	else
		951	switch (profile_lookup (cur_profile, klass, tag))
		952	{
		953	case BER_TYPE_NULL:
		954	put_length (0);
		955	break;
		956
		957	case BER_TYPE_BOOL:
		958	put_length (1);
		959	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		960	break;
		961
		962	case BER_TYPE_OID:
		963	encode_oid (data, 0);
		964	break;
		965
		966	case BER_TYPE_RELOID:
		967	encode_oid (data, 1);
		968	break;
		969
		970	case BER_TYPE_INT:
		971	encode_int (data);
		972	break;
		973
		974	case BER_TYPE_BYTES:
		975	{
		976	STRLEN len;
		977	const char *ptr = SvPVbyte (data, len);
		978	encode_data (ptr, len);
		979	}
		980	break;
		981
		982	case BER_TYPE_UTF8:
		983	{
		984	STRLEN len;
		985	const char *ptr = SvPVutf8 (data, len);
		986	encode_data (ptr, len);
		987	}
		988	break;
		989
		990	case BER_TYPE_IPADDRESS:
		991	{
		992	U8 ip[4];
		993	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		994	encode_data ((const char *)ip, sizeof (ip));
		995	}
		996	break;
		997
		998	case BER_TYPE_UCS2:
		999	encode_ucs (data, 2);
		1000	break;
		1001
		1002	case BER_TYPE_UCS4:
		1003	encode_ucs (data, 4);
		1004	break;
		1005
		1006	case BER_TYPE_REAL:
		1007	croak ("BER_TYPE_REAL not implemented");
		1008
		1009	case BER_TYPE_CROAK:
		1010	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		1011
		1012	default:
		1013	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		1014	}
		1015
		1016	}
		1017
		1018	/////////////////////////////////////////////////////////////////////////////
		1019
406	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1020	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
407		1021
408	PROTOTYPES: ENABLE	1022	PROTOTYPES: ENABLE
409		1023
410	BOOT:	1024	BOOT:
411	{	1025	{
412	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1026	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1027
		1028	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
413		1029
414	static const struct {	1030	static const struct {
415	const char *name;	1031	const char *name;
416	IV iv;	1032	IV iv;
417	} *civ, const_iv[] = {	1033	} *civ, const_iv[] = {
418	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1034	#define const_iv(name) { # name, name },
419	{ "ASN_INTEGER32", ASN_INTEGER32 },	1035	const_iv (ASN_BOOLEAN)
420	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1036	const_iv (ASN_INTEGER)
421	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1037	const_iv (ASN_BIT_STRING)
422	{ "ASN_NULL", ASN_NULL },	1038	const_iv (ASN_OCTET_STRING)
423	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1039	const_iv (ASN_NULL)
424	{ "ASN_TAG_BER", ASN_TAG_BER },	1040	const_iv (ASN_OBJECT_IDENTIFIER)
425	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1041	const_iv (ASN_OBJECT_DESCRIPTOR)
426	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1042	const_iv (ASN_OID)
427	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1043	const_iv (ASN_EXTERNAL)
428	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1044	const_iv (ASN_REAL)
429	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1045	const_iv (ASN_SEQUENCE)
430	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1046	const_iv (ASN_ENUMERATED)
431	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1047	const_iv (ASN_EMBEDDED_PDV)
432	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1048	const_iv (ASN_UTF8_STRING)
433	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1049	const_iv (ASN_RELATIVE_OID)
434	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1050	const_iv (ASN_SET)
435	{ "ASN_COUNTER32", ASN_COUNTER32 },	1051	const_iv (ASN_NUMERIC_STRING)
436	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1052	const_iv (ASN_PRINTABLE_STRING)
437	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1053	const_iv (ASN_TELETEX_STRING)
438	{ "ASN_OPAQUE", ASN_OPAQUE },	1054	const_iv (ASN_T61_STRING)
439	{ "ASN_COUNTER64", ASN_COUNTER64 },	1055	const_iv (ASN_VIDEOTEX_STRING)
		1056	const_iv (ASN_IA5_STRING)
		1057	const_iv (ASN_ASCII_STRING)
		1058	const_iv (ASN_UTC_TIME)
		1059	const_iv (ASN_GENERALIZED_TIME)
		1060	const_iv (ASN_GRAPHIC_STRING)
		1061	const_iv (ASN_VISIBLE_STRING)
		1062	const_iv (ASN_ISO646_STRING)
		1063	const_iv (ASN_GENERAL_STRING)
		1064	const_iv (ASN_UNIVERSAL_STRING)
		1065	const_iv (ASN_CHARACTER_STRING)
		1066	const_iv (ASN_BMP_STRING)
440		1067
441	{ "BER_CLASS" , BER_CLASS },	1068	const_iv (ASN_UNIVERSAL)
442	{ "BER_TAG" , BER_TAG },	1069	const_iv (ASN_APPLICATION)
443	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1070	const_iv (ASN_CONTEXT)
444	{ "BER_DATA" , BER_DATA },	1071	const_iv (ASN_PRIVATE)
		1072
		1073	const_iv (BER_CLASS)
		1074	const_iv (BER_TAG)
		1075	const_iv (BER_FLAGS)
		1076	const_iv (BER_DATA)
		1077
		1078	const_iv (BER_TYPE_BYTES)
		1079	const_iv (BER_TYPE_UTF8)
		1080	const_iv (BER_TYPE_UCS2)
		1081	const_iv (BER_TYPE_UCS4)
		1082	const_iv (BER_TYPE_INT)
		1083	const_iv (BER_TYPE_OID)
		1084	const_iv (BER_TYPE_RELOID)
		1085	const_iv (BER_TYPE_NULL)
		1086	const_iv (BER_TYPE_BOOL)
		1087	const_iv (BER_TYPE_REAL)
		1088	const_iv (BER_TYPE_IPADDRESS)
		1089	const_iv (BER_TYPE_CROAK)
		1090
		1091	const_iv (SNMP_IPADDRESS)
		1092	const_iv (SNMP_COUNTER32)
		1093	const_iv (SNMP_GAUGE32)
		1094	const_iv (SNMP_UNSIGNED32)
		1095	const_iv (SNMP_TIMETICKS)
		1096	const_iv (SNMP_OPAQUE)
		1097	const_iv (SNMP_COUNTER64)
445	};	1098	};
446		1099
447	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1100	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
448	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));	1101	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
449	}	1102	}
450		1103
451	SV *	1104	void
452	ber_decode (SV *ber)	1105	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1106	ALIAS:
		1107	ber_decode_prefix = 1
453	CODE:	1108	PPCODE:
454	{	1109	{
		1110	cur_profile = SvPROFILE (profile);
		1111	STRLEN len;
455	buf = SvPVbyte (ber, len);	1112	buf = (U8 *)SvPVbyte (ber, len);
456	cur = buf;	1113	cur = buf;
457	rem = len;	1114	end = buf + len;
458		1115
459	RETVAL = ber_decode ();	1116	SV *tuple = decode_ber ();
		1117
		1118	EXTEND (SP, 2);
		1119	PUSHs (sv_2mortal (tuple));
		1120
		1121	if (ix)
		1122	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1123	else if (cur != end)
		1124	error ("trailing garbage after BER value");
460	}	1125	}
461	OUTPUT: RETVAL
462		1126
463	void	1127	void
464	ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *constructed = &PL_sv_undef, SV *data = &PL_sv_undef)	1128	ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *flags = &PL_sv_undef, SV *data = &PL_sv_undef)
465	PROTOTYPE: $;$$$
466	PPCODE:	1129	PPCODE:
467	{	1130	{
468	if (!SvOK (tuple))	1131	if (!SvOK (tuple))
469	XSRETURN_NO;	1132	XSRETURN_NO;
470		1133
471	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1134	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
472	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1135	croak ("ber_is: tuple must be BER tuple (array-ref)");
473		1136
474	AV *av = (AV *)SvRV (tuple);	1137	AV *av = (AV *)SvRV (tuple);
475		1138
476	XPUSHs (	1139	XPUSHs (
477	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1140	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
478	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1141	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
479	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1142	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
480	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1143	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
481	? &PL_sv_yes : &PL_sv_no);	1144	? &PL_sv_yes : &PL_sv_undef);
482	}	1145	}
483		1146
484	void	1147	void
485	ber_is_seq (SV *tuple)	1148	ber_is_seq (SV *tuple)
486	PROTOTYPE: $
487	PPCODE:	1149	PPCODE:
488	{	1150	{
489	if (!SvOK (tuple))	1151	if (!SvOK (tuple))
490	XSRETURN_UNDEF;	1152	XSRETURN_UNDEF;
491		1153
492	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1154	AV *av = ber_tuple (tuple);
493	croak ("ber_seq: tuple must be ber tuple (array-ref)");
494
495	AV *av = (AV *)SvRV (tuple);
496		1155
497	XPUSHs (	1156	XPUSHs (
498	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1157	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
499	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1158	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
500	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1159	&& SvIV (AvARRAY (av)[BER_FLAGS])
501	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1160	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
502	}	1161	}
503		1162
504	void	1163	void
505	ber_is_i32 (SV *tuple, IV value)	1164	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
506	PROTOTYPE: $$
507	PPCODE:	1165	PPCODE:
508	{	1166	{
509	if (!SvOK (tuple))	1167	if (!SvOK (tuple))
510	XSRETURN_NO;	1168	XSRETURN_NO;
511		1169
512	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1170	AV *av = ber_tuple (tuple);
513	croak ("ber_seq: tuple must be ber tuple (array-ref)");
514		1171
515	AV *av = (AV *)SvRV (tuple);	1172	UV data = SvUV (AvARRAY (av)[BER_DATA]);
516		1173
517	XPUSHs (	1174	XPUSHs (
518	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1175	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
519	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1176	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
520	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1177	&& !SvIV (AvARRAY (av)[BER_FLAGS])
521	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1178	&& (!SvOK (value) || data == SvUV (value))
522	? &PL_sv_yes : &PL_sv_no);	1179	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1180	: &PL_sv_undef);
523	}	1181	}
524		1182
525	void	1183	void
526	ber_is_oid (SV *tuple, SV *oid)	1184	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
527	PROTOTYPE: $$
528	PPCODE:	1185	PPCODE:
529	{	1186	{
530	if (!SvOK (tuple))	1187	if (!SvOK (tuple))
531	XSRETURN_NO;	1188	XSRETURN_NO;
532		1189
533	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1190	AV *av = ber_tuple (tuple);
534	croak ("ber_seq: tuple must be ber tuple (array-ref)");
535
536	AV *av = (AV *)SvRV (tuple);
537		1191
538	XPUSHs (	1192	XPUSHs (
539	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1193	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
540	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1194	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
541	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1195	&& !SvIV (AvARRAY (av)[BER_FLAGS])
542	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1196	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
543	? &PL_sv_yes : &PL_sv_no);	1197	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
544	}	1198	}
545		1199
		1200	#############################################################################
		1201
		1202	void
		1203	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1204	PPCODE:
		1205	{
		1206	cur_profile = SvPROFILE (profile);
		1207	buf_sv = sv_2mortal (NEWSV (0, 256));
		1208	SvPOK_only (buf_sv);
		1209	set_buf (buf_sv);
		1210
		1211	encode_ber (tuple);
		1212
		1213	SvCUR_set (buf_sv, cur - buf);
		1214	XPUSHs (buf_sv);
		1215	}
		1216
		1217	SV *
		1218	ber_int (SV *sv)
		1219	CODE:
		1220	{
		1221	AV *av = newAV ();
		1222	av_fill (av, BER_ARRAYSIZE - 1);
		1223	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1224	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1225	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1226	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1227	RETVAL = newRV_noinc ((SV *)av);
		1228	}
		1229	OUTPUT: RETVAL
		1230
		1231	# TODO: not arrayref, but elements?
		1232	SV *
		1233	ber_seq (SV *arrayref)
		1234	CODE:
		1235	{
		1236	AV *av = newAV ();
		1237	av_fill (av, BER_ARRAYSIZE - 1);
		1238	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1239	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1240	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1241	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1242	RETVAL = newRV_noinc ((SV *)av);
		1243	}
		1244	OUTPUT: RETVAL
		1245
		1246	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1247
		1248	SV *
		1249	new (SV *klass)
		1250	CODE:
		1251	RETVAL = profile_new ();
		1252	OUTPUT: RETVAL
		1253
		1254	void
		1255	set (SV *profile, int klass, int tag, int type)
		1256	CODE:
		1257	profile_set (SvPROFILE (profile), klass, tag, type);
		1258
		1259	IV
		1260	get (SV *profile, int klass, int tag)
		1261	CODE:
		1262	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1263	OUTPUT: RETVAL
		1264
		1265	void
		1266	_set_default (SV *profile)
		1267	CODE:
		1268	default_profile = SvPROFILE (profile);
		1269
		1270

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