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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 1.30 by root, Tue Apr 23 20:03:08 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
		70	// tlow-level types this module can ecode the above (and more) into
46	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 {
47	BER_CLASS = 0,	88	BER_CLASS = 0,
48	BER_TAG = 1,	89	BER_TAG = 1,
49	BER_CONSTRUCTED = 2,	90	BER_FLAGS = 2,
50	BER_DATA = 3,	91	BER_DATA = 3,
51	BER_ARRAYSIZE	92	BER_ARRAYSIZE
52	};	93	};
53		94
54	#define MAX_OID_STRLEN 4096	95	#define MAX_OID_STRLEN 4096
55		96
56	static U8 *buf, *cur;	97	typedef void profile_type;
57	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];
58		121
59	// 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
60	static SV *newSVcacheint (int val)	123	static SV *newSVcacheint (int val)
61	{	124	{
62	static SV *cache[32];
63
64	if (val < 0 || val >= sizeof (cache))	125	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
65	return newSViv (val);	126	return newSViv (val);
66		127
67	if (!cache [val])	128	if (expect_false (!sviv_cache [val]))
68	{	129	{
69	cache [val] = newSVuv (val);	130	sviv_cache [val] = newSVuv (val);
70	SvREADONLY_on (cache [val]);	131	SvREADONLY_on (sviv_cache [val]);
71	}	132	}
72		133
73	return SvREFCNT_inc_NN (cache [val]);	134	return SvREFCNT_inc_NN (sviv_cache [val]);
74	}	135	}
75		136
76	/////////////////////////////////////////////////////////////////////////////	137	/////////////////////////////////////////////////////////////////////////////
77		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
78	static void	219	static void
79	error (const char *errmsg)	220	error (const char *errmsg)
80	{	221	{
81	croak ("%s at offset 0x%04x", errmsg, cur - buf);	222	croak ("%s at offset 0x%04x", errmsg, cur - buf);
82	}	223	}
83		224
84	static int	225	static void
85	need (int count)	226	want (UV count)
86	{	227	{
87	if (count < 0 || (int)rem < count)	228	if (expect_false ((uintptr_t)(end - cur) < count))
88	{
89	error ("unexpected end of message buffer");	229	error ("unexpected end of message buffer");
90	return 0;
91	}
92
93	return 1;
94	}	230	}
95		231
96	// get_* functions fetch something from the buffer	232	// get_* functions fetch something from the buffer
97	// decode_* functions use get_* fun ctions to decode ber values	233	// decode_* functions use get_* fun ctions to decode ber values
98		234
99	static U8 *	235	// 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	236	static U8
114	get_u8 (void)	237	get_u8 (void)
115	{	238	{
116	if (rem <= 0)	239	if (cur == end)
117	{
118	error ("unexpected end of message buffer");	240	error ("unexpected end of message buffer");
119	return 0;
120	}
121		241
122	rem--;
123	return *cur++;	242	return *cur++;
124	}	243	}
125		244
		245	// get n octets
		246	static U8 *
		247	get_n (UV count)
		248	{
		249	want (count);
		250	U8 *res = cur;
		251	cur += count;
		252	return res;
		253	}
		254
		255	// get ber-encoded integer (i.e. pack "w")
126	static U32	256	static UV
127	get_ber (void)	257	get_w (void)
128	{	258	{
129	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)");
130		264
131	for (;;)	265	for (;;)
132	{	266	{
133	U8 c = get_u8 ();	267	if (expect_false (res >> UVSIZE * 8 - 7))
		268	error ("BER variable length integer overflow");
		269
134	res = (res << 7) | (c & 0x7f);	270	res = (res << 7) | (c & 0x7f);
135		271
136	if (!(c & 0x80))	272	if (expect_true (!(c & 0x80)))
137	return res;	273	return res;
138	}
139	}
140		274
		275	c = get_u8 ();
		276	}
		277	}
		278
141	static U32	279	static UV
142	get_length (void)	280	get_length (void)
143	{	281	{
144	U32 res = get_u8 ();	282	UV res = get_u8 ();
145		283
146	if (res & 0x80)	284	if (expect_false (res & 0x80))
147	{	285	{
148	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
149	res = 0;	300	res = 0;
150		301	do
151	switch (cnt)	302	res = (res << 8) | *cur++;
152	{	303	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	}	304	}
167		305
168	return res;	306	return res;
169	}	307	}
170		308
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 *	309	static SV *
202	decode_integer32 (void)	310	decode_int (UV len)
203	{	311	{
204	return newSViv ((I32)get_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);
205	}	339	}
206		340
207	static SV *	341	static SV *
208	decode_unsigned32 (void)	342	decode_data (UV len)
209	{	343	{
210	return newSVuv ((U32)get_integer32 ());	344	return newSVpvn ((char *)get_n (len), len);
211	}	345	}
212		346
213	#if IVSIZE >= 8
214
215	static U64TYPE
216	get_integer64 (void)
217	{
218	U32 length = get_length ();
219
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	}
244
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	347	// helper for decode_object_identifier
275	static char *	348	static char *
276	write_uv (char *buf, U32 u)	349	write_uv (char *buf, UV u)
277	{	350	{
278	// 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)
279	if (u < 10)	352	if (expect_true (u < 10))
280	*buf++ = u + '0';	353	*buf++ = u + '0';
281	else	354	else
282	{	355	{
		356	// this *could* be done much faster using branchless fixed-point arithmetics
283	char *beg = buf;	357	char *beg = buf;
284		358
285	do	359	do
286	{	360	{
287	*buf++ = u % 10 + '0';	361	*buf++ = u % 10 + '0';
288	u /= 10;	362	u /= 10;
289	}	363	}
290	while (u);	364	while (u);
291		365
292	// reverse digits	366	// reverse digits
293	for (char *ptr = buf; --ptr != beg; ++beg)	367	char *ptr = buf;
		368	while (--ptr > beg)
294	{	369	{
295	char c = *ptr;	370	char c = *ptr;
296	*ptr = *beg;	371	*ptr = *beg;
297	*beg = c;	372	*beg = c;
		373	++beg;
298	}	374	}
299	}	375	}
300		376
301	return buf;	377	return buf;
302	}	378	}
303		379
304	static SV *	380	static SV *
305	decode_object_identifier (void)	381	decode_oid (UV len, int relative)
306	{	382	{
307	U32 length = get_length ();
308
309	if (length <= 0)	383	if (len <= 0)
310	{	384	{
311	error ("OBJECT IDENTIFIER length equal to zero");	385	error ("BER_TYPE_OID length must not be zero");
312	return &PL_sv_undef;	386	return &PL_sv_undef;
313	}	387	}
314		388
315	U8 *end = cur + length;	389	U8 *end = cur + len;
316	U32 w = get_ber ();	390	UV w = get_w ();
317		391
318	static char oid[MAX_OID_STRLEN]; // must be static	392	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
319	char *app = oid;	393	char *app = oid;
320		394
		395	if (relative)
321	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);
322	*app++ = '.';	407	*app++ = '.';
323	app = write_uv (app, (U8)w % 40);	408	app = write_uv (app, w2);
		409	}
324		410
		411	while (cur < end)
		412	{
325	// we assume an oid component is never > 64 bytes	413	// we assume an oid component is never > 64 digits
326	while (cur < end && oid + sizeof (oid) - app > 64)	414	if (oid + sizeof (oid) - app < 64)
327	{	415	croak ("BER_TYPE_OID to long to decode");
		416
328	w = get_ber ();	417	w = get_w ();
329	*app++ = '.';	418	*app++ = '.';
330	app = write_uv (app, w);	419	app = write_uv (app, w);
331	}	420	}
332		421
333	return newSVpvn (oid, app - oid);	422	return newSVpvn (oid, app - oid);
334	}	423	}
335		424
		425	// TODO: this is unacceptably slow
336	static SV *	426	static SV *
		427	decode_ucs (UV len, int chrsize)
		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 *
337	decode_ber ()	460	decode_ber (void)
338	{	461	{
339	int identifier = get_u8 ();	462	int identifier = get_u8 ();
340		463
341	SV *res;	464	SV *res;
342		465
343	int constructed = identifier & ASN_CONSTRUCTED;	466	int constructed = identifier & ASN_CONSTRUCTED;
344	int klass = identifier & ASN_CLASS_MASK;	467	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
345	int tag = identifier & ASN_TAG_MASK;	468	int tag = identifier & ASN_TAG_MASK;
346		469
347	if (tag == ASN_TAG_BER)	470	if (tag == ASN_TAG_BER)
348	tag = get_ber ();	471	tag = get_w ();
349
350	if (tag == ASN_TAG_BER)
351	tag = get_ber ();
352		472
353	if (constructed)	473	if (constructed)
354	{	474	{
355	U32 len = get_length ();	475	UV len = get_length ();
356	U32 seqend = (cur - buf) + len;	476	UV seqend = (cur - buf) + len;
357	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	477	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
358		478
359	while (cur < buf + seqend)	479	while (cur < buf + seqend)
360	av_push (av, decode_ber ());	480	av_push (av, decode_ber ());
361		481
362	if (cur > buf + seqend)	482	if (expect_false (cur > buf + seqend))
363	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	483	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
364		484
365	res = newRV_inc ((SV *)av);	485	res = newRV_inc ((SV *)av);
366	}	486	}
367	else	487	else
368	switch (identifier)	488	{
		489	UV len = get_length ();
		490
		491	switch (profile_lookup (cur_profile, klass, tag))
369	{	492	{
370	case ASN_NULL:	493	case BER_TYPE_NULL:
		494	if (expect_false (len))
		495	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		496
371	res = &PL_sv_undef;	497	res = &PL_sv_undef;
372	break;	498	break;
373		499
374	case ASN_OBJECT_IDENTIFIER:	500	case BER_TYPE_BOOL:
375	res = decode_object_identifier ();	501	if (expect_false (len != 1))
		502	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
		503
		504	res = newSVcacheint (!!get_u8 ());
376	break;	505	break;
377		506
378	case ASN_INTEGER32:	507	case BER_TYPE_OID:
379	res = decode_integer32 ();	508	res = decode_oid (len, 0);
380	break;	509	break;
381		510
382	case ASN_APPLICATION | ASN_UNSIGNED32:	511	case BER_TYPE_RELOID:
383	case ASN_APPLICATION | ASN_COUNTER32:	512	res = decode_oid (len, 1);
384	case ASN_APPLICATION | ASN_TIMETICKS:
385	res = decode_unsigned32 ();
386	break;	513	break;
387		514
388	#if 0 // handled by default case	515	case BER_TYPE_INT:
389	case ASN_OCTET_STRING:
390	case ASN_APPLICATION | ASN_IPADDRESS:
391	case ASN_APPLICATION | ASN_OPAQUE:
392	res = decode_octet_string ();	516	res = decode_int (len);
393	break;	517	break;
394	#endif
395		518
396	case ASN_APPLICATION | ASN_COUNTER64:	519	case BER_TYPE_UTF8:
397	res = decode_integer64 ();	520	res = decode_data (len);
		521	SvUTF8_on (res);
398	break;	522	break;
399		523
400	default:	524	case BER_TYPE_BYTES:
401	res = decode_octet_string ();	525	res = decode_data (len);
402	break;	526	break;
		527
		528	case BER_TYPE_IPADDRESS:
		529	{
		530	if (len != 4)
		531	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		532
		533	U8 *data = get_n (4);
		534	res = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]);
		535	}
		536	break;
		537
		538	case BER_TYPE_UCS2:
		539	res = decode_ucs (len, 2);
		540	break;
		541
		542	case BER_TYPE_UCS4:
		543	res = decode_ucs (len, 4);
		544	break;
		545
		546	case BER_TYPE_REAL:
		547	error ("BER_TYPE_REAL not implemented");
		548
		549	case BER_TYPE_CROAK:
		550	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		551
		552	default:
		553	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
403	}	554	}
		555	}
404		556
405	AV *av = newAV ();	557	AV *av = newAV ();
406	av_fill (av, BER_ARRAYSIZE - 1);	558	av_fill (av, BER_ARRAYSIZE - 1);
407	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	559	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
408	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	560	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
409	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	561	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
410	AvARRAY (av)[BER_DATA ] = res;	562	AvARRAY (av)[BER_DATA ] = res;
411		563
412	return newRV_noinc ((SV *)av);	564	return newRV_noinc ((SV *)av);
413	}	565	}
414		566
		567	/////////////////////////////////////////////////////////////////////////////
		568	// encoder
		569
		570	/* adds two STRLENs together, slow, and with paranoia */
		571	static STRLEN
		572	strlen_sum (STRLEN l1, STRLEN l2)
		573	{
		574	size_t sum = l1 + l2;
		575
		576	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		577	croak ("Convert::BER::XS: string size overflow");
		578
		579	return sum;
		580	}
		581
		582	static void
		583	set_buf (SV *sv)
		584	{
		585	STRLEN len;
		586	buf_sv = sv;
		587	buf = (U8 *)SvPVbyte (buf_sv, len);
		588	cur = buf;
		589	end = buf + len;
		590	}
		591
		592	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		593	static char *
		594	my_sv_grow (SV *sv, size_t len1, size_t len2)
		595	{
		596	len1 = strlen_sum (len1, len2);
		597	len1 = strlen_sum (len1, len1 >> 1);
		598
		599	if (len1 > 4096 - 24)
		600	len1 = (len1 | 4095) - 24;
		601
		602	return SvGROW (sv, len1);
		603	}
		604
		605	static void
		606	need (STRLEN len)
		607	{
		608	if (expect_false ((uintptr_t)(end - cur) < len))
		609	{
		610	STRLEN pos = cur - buf;
		611	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		612	cur = buf + pos;
		613	end = buf + SvLEN (buf_sv) - 1;
		614	}
		615	}
		616
		617	static void
		618	put_u8 (int val)
		619	{
		620	need (1);
		621	*cur++ = val;
		622	}
		623
		624	static void
		625	put_w_nocheck (UV val)
		626	{
		627	#if UVSIZE > 4
		628	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		629	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		630	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		631	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		632	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		633	#endif
		634	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		635	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		636	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		637	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		638	*cur = val & 0x7f; cur += 1;
		639	}
		640
		641	static void
		642	put_w (UV val)
		643	{
		644	need (5); // we only handle up to 5 bytes
		645
		646	put_w_nocheck (val);
		647	}
		648
		649	static U8 *
		650	put_length_at (UV val, U8 *cur)
		651	{
		652	if (val <= 0x7fU)
		653	*cur++ = val;
		654	else
		655	{
		656	U8 *lenb = cur++;
		657
		658	#if UVSIZE > 4
		659	*cur = val >> 56; cur += val >= ((UV)1 << (8 * 7));
		660	*cur = val >> 48; cur += val >= ((UV)1 << (8 * 6));
		661	*cur = val >> 40; cur += val >= ((UV)1 << (8 * 5));
		662	*cur = val >> 32; cur += val >= ((UV)1 << (8 * 4));
		663	#endif
		664	*cur = val >> 24; cur += val >= ((UV)1 << (8 * 3));
		665	*cur = val >> 16; cur += val >= ((UV)1 << (8 * 2));
		666	*cur = val >> 8; cur += val >= ((UV)1 << (8 * 1));
		667	*cur = val ; cur += 1;
		668
		669	*lenb = 0x80 + cur - lenb - 1;
		670	}
		671
		672	return cur;
		673	}
		674
		675	static void
		676	put_length (UV val)
		677	{
		678	need (9 + val);
		679	cur = put_length_at (val, cur);
		680	}
		681
		682	// return how many bytes the encoded length requires
		683	static int length_length (UV val)
		684	{
		685	// use hashing with a DeBruin sequence, anyone?
		686	return expect_true (val <= 0x7fU)
		687	? 1
		688	: 2
		689	+ (val > 0x000000000000ffU)
		690	+ (val > 0x0000000000ffffU)
		691	+ (val > 0x00000000ffffffU)
		692	#if UVSIZE > 4
		693	+ (val > 0x000000ffffffffU)
		694	+ (val > 0x0000ffffffffffU)
		695	+ (val > 0x00ffffffffffffU)
		696	+ (val > 0xffffffffffffffU)
		697	#endif
		698	;
		699	}
		700
		701	static void
		702	encode_data (const char *ptr, STRLEN len)
		703	{
		704	put_length (len);
		705	memcpy (cur, ptr, len);
		706	cur += len;
		707	}
		708
		709	static void
		710	encode_uv (UV uv)
		711	{
		712	}
		713
		714	static void
		715	encode_int (SV *sv)
		716	{
		717	need (8 + 1 + 1); // 64 bit + length + extra 0
		718
		719	if (expect_false (!SvIOK (sv)))
		720	sv_2iv_flags (sv, 0);
		721
		722	U8 *lenb = cur++;
		723
		724	if (SvIOK_notUV (sv))
		725	{
		726	IV iv = SvIVX (sv);
		727
		728	if (expect_false (iv < 0))
		729	{
		730	// get two's complement bit pattern - works even on hypothetical non-2c machines
		731	UV uv = iv;
		732
		733	#if UVSIZE > 4
		734	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		735	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		736	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		737	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		738	#endif
		739	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		740	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		741	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		742	*cur = uv ; cur += 1;
		743
		744	*lenb = cur - lenb - 1;
		745
		746	return;
		747	}
		748	}
		749
		750	UV uv = SvUV (sv);
		751
		752	// prepend an extra 0 if the high bit is 1
		753	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		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
		769	// we don't know the length yet, so we optimistically
		770	// assume the length will need one octet later. If that
		771	// turns out to be wrong, we memmove as needed.
		772	// mark the beginning
		773	static STRLEN
		774	len_fixup_mark (void)
		775	{
		776	return cur++ - buf;
		777	}
		778
		779	// patch up the length
		780	static void
		781	len_fixup (STRLEN mark)
		782	{
		783	STRLEN reallen = (cur - buf) - mark - 1;
		784	int lenlen = length_length (reallen);
		785
		786	if (expect_false (lenlen > 1))
		787	{
		788	// bad luck, we have to shift the bytes to make room for the length
		789	need (5);
		790	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		791	cur += lenlen - 1;
		792	}
		793
		794	put_length_at (reallen, buf + mark);
		795	}
		796
		797	static char *
		798	read_uv (char *str, UV *uv)
		799	{
		800	UV r = 0;
		801
		802	while (*str >= '0')
		803	r = r * 10 + *str++ - '0';
		804
		805	*uv = r;
		806
		807	str += !!*str; // advance over any non-zero byte
		808
		809	return str;
		810	}
		811
		812	static void
		813	encode_oid (SV *oid, int relative)
		814	{
		815	STRLEN len;
		816	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		817
		818	// we need at most as many octets as the string form
		819	need (len + 1);
		820	STRLEN mark = len_fixup_mark ();
		821
		822	UV w1, w2;
		823
		824	if (!relative)
		825	{
		826	ptr = read_uv (ptr, &w1);
		827	ptr = read_uv (ptr, &w2);
		828
		829	put_w_nocheck (w1 * 40 + w2);
		830	}
		831
		832	while (*ptr)
		833	{
		834	ptr = read_uv (ptr, &w1);
		835	put_w_nocheck (w1);
		836	}
		837
		838	len_fixup (mark);
		839	}
		840
		841	// check whether an SV is a BER tuple and returns its AV *
		842	static AV *
		843	ber_tuple (SV *tuple)
		844	{
		845	SV *rv;
		846
		847	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		848	croak ("BER tuple must be array-reference");
		849
		850	if (expect_false (SvRMAGICAL (rv)))
		851	croak ("BER tuple must not be tied");
		852
		853	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		854	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		855
		856	return (AV *)rv;
		857	}
		858
		859	static void
		860	encode_ucs (SV *data, int chrsize)
		861	{
		862	STRLEN uchars = sv_len_utf8 (data);
		863	STRLEN len;;
		864	char *ptr = SvPVutf8 (data, len);
		865
		866	put_length (uchars * chrsize);
		867
		868	while (uchars--)
		869	{
		870	STRLEN uclen;
		871	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		872
		873	ptr += uclen;
		874	len -= uclen;
		875
		876	if (chrsize == 4)
		877	{
		878	*cur++ = uchr >> 24;
		879	*cur++ = uchr >> 16;
		880	}
		881
		882	*cur++ = uchr >> 8;
		883	*cur++ = uchr;
		884	}
		885	}
		886	static void
		887	encode_ber (SV *tuple)
		888	{
		889	AV *av = ber_tuple (tuple);
		890
		891	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		892	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		893	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		894	SV *data = AvARRAY (av)[BER_DATA];
		895
		896	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		897
		898	if (expect_false (tag >= ASN_TAG_BER))
		899	{
		900	put_u8 (identifier | ASN_TAG_BER);
		901	put_w (tag);
		902	}
		903	else
		904	put_u8 (identifier | tag);
		905
		906	if (constructed)
		907	{
		908	// we optimistically assume that only one length byte is needed
		909	// and adjust later
		910	need (1);
		911	STRLEN mark = len_fixup_mark ();
		912
		913	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		914	croak ("BER CONSTRUCTED data must be array-reference");
		915
		916	AV *av = (AV *)SvRV (data);
		917	int fill = AvFILL (av);
		918
		919	if (expect_false (SvRMAGICAL (av)))
		920	croak ("BER CONSTRUCTED data must not be tied");
		921
		922	int i;
		923	for (i = 0; i <= fill; ++i)
		924	encode_ber (AvARRAY (av)[i]);
		925
		926	len_fixup (mark);
		927	}
		928	else
		929	switch (profile_lookup (cur_profile, klass, tag))
		930	{
		931	case BER_TYPE_NULL:
		932	put_length (0);
		933	break;
		934
		935	case BER_TYPE_BOOL:
		936	put_length (1);
		937	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		938	break;
		939
		940	case BER_TYPE_OID:
		941	encode_oid (data, 0);
		942	break;
		943
		944	case BER_TYPE_RELOID:
		945	encode_oid (data, 1);
		946	break;
		947
		948	case BER_TYPE_INT:
		949	encode_int (data);
		950	break;
		951
		952	case BER_TYPE_BYTES:
		953	{
		954	STRLEN len;
		955	const char *ptr = SvPVbyte (data, len);
		956	encode_data (ptr, len);
		957	}
		958	break;
		959
		960	case BER_TYPE_UTF8:
		961	{
		962	STRLEN len;
		963	const char *ptr = SvPVutf8 (data, len);
		964	encode_data (ptr, len);
		965	}
		966	break;
		967
		968	case BER_TYPE_IPADDRESS:
		969	{
		970	U8 ip[4];
		971	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		972	encode_data ((const char *)ip, sizeof (ip));
		973	}
		974	break;
		975
		976	case BER_TYPE_UCS2:
		977	encode_ucs (data, 2);
		978	break;
		979
		980	case BER_TYPE_UCS4:
		981	encode_ucs (data, 4);
		982	break;
		983
		984	case BER_TYPE_REAL:
		985	croak ("BER_TYPE_REAL not implemented");
		986
		987	case BER_TYPE_CROAK:
		988	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		989
		990	default:
		991	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		992	}
		993
		994	}
		995
		996	/////////////////////////////////////////////////////////////////////////////
		997
415	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	998	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
416		999
417	PROTOTYPES: ENABLE	1000	PROTOTYPES: ENABLE
418		1001
419	BOOT:	1002	BOOT:
420	{	1003	{
421	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1004	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1005
		1006	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
422		1007
423	static const struct {	1008	static const struct {
424	const char *name;	1009	const char *name;
425	IV iv;	1010	IV iv;
426	} *civ, const_iv[] = {	1011	} *civ, const_iv[] = {
427	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1012	#define const_iv(name) { # name, name },
428	{ "ASN_INTEGER32", ASN_INTEGER32 },	1013	const_iv (ASN_BOOLEAN)
429	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1014	const_iv (ASN_INTEGER)
430	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1015	const_iv (ASN_BIT_STRING)
431	{ "ASN_NULL", ASN_NULL },	1016	const_iv (ASN_OCTET_STRING)
432	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1017	const_iv (ASN_NULL)
433	{ "ASN_TAG_BER", ASN_TAG_BER },	1018	const_iv (ASN_OBJECT_IDENTIFIER)
434	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1019	const_iv (ASN_OBJECT_DESCRIPTOR)
435	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1020	const_iv (ASN_OID)
436	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1021	const_iv (ASN_EXTERNAL)
437	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1022	const_iv (ASN_REAL)
438	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1023	const_iv (ASN_SEQUENCE)
439	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1024	const_iv (ASN_ENUMERATED)
440	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1025	const_iv (ASN_EMBEDDED_PDV)
441	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1026	const_iv (ASN_UTF8_STRING)
442	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1027	const_iv (ASN_RELATIVE_OID)
443	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1028	const_iv (ASN_SET)
444	{ "ASN_COUNTER32", ASN_COUNTER32 },	1029	const_iv (ASN_NUMERIC_STRING)
445	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1030	const_iv (ASN_PRINTABLE_STRING)
446	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1031	const_iv (ASN_TELETEX_STRING)
447	{ "ASN_OPAQUE", ASN_OPAQUE },	1032	const_iv (ASN_T61_STRING)
448	{ "ASN_COUNTER64", ASN_COUNTER64 },	1033	const_iv (ASN_VIDEOTEX_STRING)
		1034	const_iv (ASN_IA5_STRING)
		1035	const_iv (ASN_ASCII_STRING)
		1036	const_iv (ASN_UTC_TIME)
		1037	const_iv (ASN_GENERALIZED_TIME)
		1038	const_iv (ASN_GRAPHIC_STRING)
		1039	const_iv (ASN_VISIBLE_STRING)
		1040	const_iv (ASN_ISO646_STRING)
		1041	const_iv (ASN_GENERAL_STRING)
		1042	const_iv (ASN_UNIVERSAL_STRING)
		1043	const_iv (ASN_CHARACTER_STRING)
		1044	const_iv (ASN_BMP_STRING)
449		1045
450	{ "BER_CLASS" , BER_CLASS },	1046	const_iv (ASN_UNIVERSAL)
451	{ "BER_TAG" , BER_TAG },	1047	const_iv (ASN_APPLICATION)
452	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1048	const_iv (ASN_CONTEXT)
453	{ "BER_DATA" , BER_DATA },	1049	const_iv (ASN_PRIVATE)
		1050
		1051	const_iv (BER_CLASS)
		1052	const_iv (BER_TAG)
		1053	const_iv (BER_FLAGS)
		1054	const_iv (BER_DATA)
		1055
		1056	const_iv (BER_TYPE_BYTES)
		1057	const_iv (BER_TYPE_UTF8)
		1058	const_iv (BER_TYPE_UCS2)
		1059	const_iv (BER_TYPE_UCS4)
		1060	const_iv (BER_TYPE_INT)
		1061	const_iv (BER_TYPE_OID)
		1062	const_iv (BER_TYPE_RELOID)
		1063	const_iv (BER_TYPE_NULL)
		1064	const_iv (BER_TYPE_BOOL)
		1065	const_iv (BER_TYPE_REAL)
		1066	const_iv (BER_TYPE_IPADDRESS)
		1067	const_iv (BER_TYPE_CROAK)
		1068
		1069	const_iv (SNMP_IPADDRESS)
		1070	const_iv (SNMP_COUNTER32)
		1071	const_iv (SNMP_GAUGE32)
		1072	const_iv (SNMP_UNSIGNED32)
		1073	const_iv (SNMP_TIMETICKS)
		1074	const_iv (SNMP_OPAQUE)
		1075	const_iv (SNMP_COUNTER64)
454	};	1076	};
455		1077
456	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1078	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));	1079	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
458	}	1080	}
459		1081
460	SV *	1082	void
461	ber_decode (SV *ber)	1083	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1084	ALIAS:
		1085	ber_decode_prefix = 1
462	CODE:	1086	PPCODE:
463	{	1087	{
		1088	cur_profile = SvPROFILE (profile);
		1089	STRLEN len;
464	buf = SvPVbyte (ber, len);	1090	buf = (U8 *)SvPVbyte (ber, len);
465	cur = buf;	1091	cur = buf;
466	rem = len;	1092	end = buf + len;
467		1093
468	RETVAL = decode_ber ();	1094	SV *tuple = decode_ber ();
		1095
		1096	EXTEND (SP, 2);
		1097	PUSHs (sv_2mortal (tuple));
		1098
		1099	if (ix)
		1100	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1101	else if (cur != end)
		1102	error ("trailing garbage after BER value");
469	}	1103	}
470	OUTPUT: RETVAL
471		1104
472	void	1105	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)	1106	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:	1107	PPCODE:
476	{	1108	{
477	if (!SvOK (tuple))	1109	if (!SvOK (tuple))
478	XSRETURN_NO;	1110	XSRETURN_NO;
479		1111
480	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1112	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
481	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1113	croak ("ber_is: tuple must be BER tuple (array-ref)");
482		1114
483	AV *av = (AV *)SvRV (tuple);	1115	AV *av = (AV *)SvRV (tuple);
484		1116
485	XPUSHs (	1117	XPUSHs (
486	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1118	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
487	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1119	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
488	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1120	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
489	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1121	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
490	? &PL_sv_yes : &PL_sv_no);	1122	? &PL_sv_yes : &PL_sv_undef);
491	}	1123	}
492		1124
493	void	1125	void
494	ber_is_seq (SV *tuple)	1126	ber_is_seq (SV *tuple)
495	PROTOTYPE: $
496	PPCODE:	1127	PPCODE:
497	{	1128	{
498	if (!SvOK (tuple))	1129	if (!SvOK (tuple))
499	XSRETURN_UNDEF;	1130	XSRETURN_UNDEF;
500		1131
501	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1132	AV *av = ber_tuple (tuple);
502	croak ("ber_seq: tuple must be ber tuple (array-ref)");
503
504	AV *av = (AV *)SvRV (tuple);
505		1133
506	XPUSHs (	1134	XPUSHs (
507	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1135	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
508	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1136	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
509	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1137	&& SvIV (AvARRAY (av)[BER_FLAGS])
510	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1138	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
511	}	1139	}
512		1140
513	void	1141	void
514	ber_is_i32 (SV *tuple, IV value)	1142	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
515	PROTOTYPE: $$
516	PPCODE:	1143	PPCODE:
517	{	1144	{
518	if (!SvOK (tuple))	1145	if (!SvOK (tuple))
519	XSRETURN_NO;	1146	XSRETURN_NO;
520		1147
521	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1148	AV *av = ber_tuple (tuple);
522	croak ("ber_seq: tuple must be ber tuple (array-ref)");
523		1149
524	AV *av = (AV *)SvRV (tuple);	1150	UV data = SvUV (AvARRAY (av)[BER_DATA]);
525		1151
526	XPUSHs (	1152	XPUSHs (
527	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1153	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
528	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1154	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
529	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1155	&& !SvIV (AvARRAY (av)[BER_FLAGS])
530	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1156	&& (!SvOK (value) || data == SvUV (value))
531	? &PL_sv_yes : &PL_sv_no);	1157	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1158	: &PL_sv_undef);
532	}	1159	}
533		1160
534	void	1161	void
535	ber_is_oid (SV *tuple, SV *oid)	1162	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
536	PROTOTYPE: $$
537	PPCODE:	1163	PPCODE:
538	{	1164	{
539	if (!SvOK (tuple))	1165	if (!SvOK (tuple))
540	XSRETURN_NO;	1166	XSRETURN_NO;
541		1167
542	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1168	AV *av = ber_tuple (tuple);
543	croak ("ber_seq: tuple must be ber tuple (array-ref)");
544
545	AV *av = (AV *)SvRV (tuple);
546		1169
547	XPUSHs (	1170	XPUSHs (
548	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1171	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
549	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1172	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
550	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1173	&& !SvIV (AvARRAY (av)[BER_FLAGS])
551	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1174	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
552	? &PL_sv_yes : &PL_sv_no);	1175	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
553	}	1176	}
554		1177
		1178	#############################################################################
		1179
		1180	void
		1181	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	cur_profile = SvPROFILE (profile);
		1185	buf_sv = sv_2mortal (NEWSV (0, 256));
		1186	SvPOK_only (buf_sv);
		1187	set_buf (buf_sv);
		1188
		1189	encode_ber (tuple);
		1190
		1191	SvCUR_set (buf_sv, cur - buf);
		1192	XPUSHs (buf_sv);
		1193	}
		1194
		1195	SV *
		1196	ber_int (SV *sv)
		1197	CODE:
		1198	{
		1199	AV *av = newAV ();
		1200	av_fill (av, BER_ARRAYSIZE - 1);
		1201	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1202	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1203	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1204	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1205	RETVAL = newRV_noinc ((SV *)av);
		1206	}
		1207	OUTPUT: RETVAL
		1208
		1209	# TODO: not arrayref, but elements?
		1210	SV *
		1211	ber_seq (SV *arrayref)
		1212	CODE:
		1213	{
		1214	AV *av = newAV ();
		1215	av_fill (av, BER_ARRAYSIZE - 1);
		1216	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1217	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1218	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1219	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1220	RETVAL = newRV_noinc ((SV *)av);
		1221	}
		1222	OUTPUT: RETVAL
		1223
		1224	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1225
		1226	SV *
		1227	new (SV *klass)
		1228	CODE:
		1229	RETVAL = profile_new ();
		1230	OUTPUT: RETVAL
		1231
		1232	void
		1233	set (SV *profile, int klass, int tag, int type)
		1234	CODE:
		1235	profile_set (SvPROFILE (profile), klass, tag, type);
		1236
		1237	IV
		1238	get (SV *profile, int klass, int tag)
		1239	CODE:
		1240	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1241	OUTPUT: RETVAL
		1242
		1243	void
		1244	_set_default (SV *profile)
		1245	CODE:
		1246	default_profile = SvPROFILE (profile);
		1247
		1248

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