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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 1.34 by root, Thu Feb 6 11:51:40 2020 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	#include <math.h>
		6
5	// C99 required	7	// C99 required!
		8	// this is not just for comments, but also for
		9	// integer constant semantics,
		10	// sscanf format modifiers and more.
6		11
7	enum {	12	enum {
8	// ASN_TAG	13	// ASN_TAG
9	ASN_BOOLEAN = 0x01,	14	ASN_BOOLEAN = 0x01,
10	ASN_INTEGER32 = 0x02,	15	ASN_INTEGER = 0x02,
11	ASN_BIT_STRING = 0x03,	16	ASN_BIT_STRING = 0x03,
12	ASN_OCTET_STRING = 0x04,	17	ASN_OCTET_STRING = 0x04,
13	ASN_NULL = 0x05,	18	ASN_NULL = 0x05,
14	ASN_OBJECT_IDENTIFIER = 0x06,	19	ASN_OBJECT_IDENTIFIER = 0x06,
		20	ASN_OID = 0x06,
		21	ASN_OBJECT_DESCRIPTOR = 0x07,
		22	ASN_EXTERNAL = 0x08,
15	ASN_REAL = 0x09, //X	23	ASN_REAL = 0x09,
16	ASN_ENUMERATED = 0x0a, //X	24	ASN_ENUMERATED = 0x0a,
		25	ASN_EMBEDDED_PDV = 0x0b,
		26	ASN_UTF8_STRING = 0x0c,
		27	ASN_RELATIVE_OID = 0x0d,
17	ASN_SEQUENCE = 0x10,	28	ASN_SEQUENCE = 0x10,
18	ASN_SET = 0x11, //X	29	ASN_SET = 0x11,
		30	ASN_NUMERIC_STRING = 0x12,
		31	ASN_PRINTABLE_STRING = 0x13,
		32	ASN_TELETEX_STRING = 0x14,
		33	ASN_T61_STRING = 0x14,
		34	ASN_VIDEOTEX_STRING = 0x15,
		35	ASN_IA5_STRING = 0x16,
		36	ASN_ASCII_STRING = 0x16,
19	ASN_UTC_TIME = 0x17, //X	37	ASN_UTC_TIME = 0x17,
20	ASN_GENERAL_TIME = 0x18, //X	38	ASN_GENERALIZED_TIME = 0x18,
		39	ASN_GRAPHIC_STRING = 0x19,
		40	ASN_VISIBLE_STRING = 0x1a,
		41	ASN_ISO646_STRING = 0x1a,
		42	ASN_GENERAL_STRING = 0x1b,
		43	ASN_UNIVERSAL_STRING = 0x1c,
		44	ASN_CHARACTER_STRING = 0x1d,
		45	ASN_BMP_STRING = 0x1e,
21		46
22	ASN_TAG_BER = 0x1f,	47	ASN_TAG_BER = 0x1f,
23	ASN_TAG_MASK = 0x1f,	48	ASN_TAG_MASK = 0x1f,
24		49
25	// primitive/constructed	50	// primitive/constructed
26	ASN_CONSTRUCTED = 0x20,	51	ASN_CONSTRUCTED = 0x20,
27		52
28	// ASN_CLASS	53	// ASN_CLASS
29	ASN_UNIVERSAL = 0x00,	54	ASN_UNIVERSAL = 0x00,
30	ASN_APPLICATION = 0x40,	55	ASN_APPLICATION = 0x01,
31	ASN_CONTEXT = 0x80,	56	ASN_CONTEXT = 0x02,
32	ASN_PRIVATE = 0xc0,	57	ASN_PRIVATE = 0x03,
33		58
34	ASN_CLASS_MASK = 0xc0,	59	ASN_CLASS_MASK = 0xc0,
35	ASN_CLASS_SHIFT = 6,	60	ASN_CLASS_SHIFT = 6,
36		61
37	// ASN_APPLICATION SNMP	62	// ASN_APPLICATION SNMP
38	ASN_IPADDRESS = 0x00,	63	SNMP_IPADDRESS = 0x00,
39	ASN_COUNTER32 = 0x01,	64	SNMP_COUNTER32 = 0x01,
		65	SNMP_GAUGE32 = 0x02,
40	ASN_UNSIGNED32 = 0x02,	66	SNMP_UNSIGNED32 = 0x02,
41	ASN_TIMETICKS = 0x03,	67	SNMP_TIMETICKS = 0x03,
42	ASN_OPAQUE = 0x04,	68	SNMP_OPAQUE = 0x04,
43	ASN_COUNTER64 = 0x06,	69	SNMP_COUNTER64 = 0x06,
44	};	70	};
45		71
		72	// low-level types this module can ecode the above (and more) into
46	enum {	73	enum {
		74	BER_TYPE_BYTES,
		75	BER_TYPE_UTF8,
		76	BER_TYPE_UCS2,
		77	BER_TYPE_UCS4,
		78	BER_TYPE_INT,
		79	BER_TYPE_OID,
		80	BER_TYPE_RELOID,
		81	BER_TYPE_NULL,
		82	BER_TYPE_BOOL,
		83	BER_TYPE_REAL,
		84	BER_TYPE_IPADDRESS,
		85	BER_TYPE_CROAK,
		86	};
		87
		88	// tuple array indices
		89	enum {
47	BER_CLASS = 0,	90	BER_CLASS = 0,
48	BER_TAG = 1,	91	BER_TAG = 1,
49	BER_CONSTRUCTED = 2,	92	BER_FLAGS = 2,
50	BER_DATA = 3,	93	BER_DATA = 3,
51	BER_ARRAYSIZE	94	BER_ARRAYSIZE
52	};	95	};
53		96
54	#define MAX_OID_STRLEN 4096	97	#define MAX_OID_STRLEN 4096
55		98
56	static U8 *buf, *cur;	99	typedef void profile_type;
57	static STRLEN len, rem;	100
		101	static profile_type *cur_profile, *default_profile;
		102	static SV *buf_sv; // encoding buffer
		103	static U8 *buf, *cur, *end; // buffer start, current, end
		104
		105	#if PERL_VERSION < 18
		106	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
		107	#endif
		108
		109	#ifndef SvREFCNT_inc_NN
		110	#define SvREFCNT_inc_NN(x) SvREFCNT_inc (x)
		111	#endif
		112	#ifndef SvREFCNT_dec_NN
		113	#define SvREFCNT_dec_NN(x) SvREFCNT_dec (x)
		114	#endif
		115
		116	#if __GNUC__ >= 3
		117	# define expect(expr,value) __builtin_expect ((expr), (value))
		118	# define INLINE static inline
		119	#else
		120	# define expect(expr,value) (expr)
		121	# define INLINE static
		122	#endif
		123
		124	#define expect_false(expr) expect ((expr) != 0, 0)
		125	#define expect_true(expr) expect ((expr) != 0, 1)
		126
		127	/////////////////////////////////////////////////////////////////////////////
		128
		129	static SV *sviv_cache[32];
58		130
59	// for "small" integers, return a readonly sv, otherwise create a new one	131	// for "small" integers, return a readonly sv, otherwise create a new one
60	static SV *newSVcacheint (int val)	132	static SV *newSVcacheint (int val)
61	{	133	{
62	static SV *cache[32];
63
64	if (val < 0 || val >= sizeof (cache))	134	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
65	return newSViv (val);	135	return newSViv (val);
66		136
67	if (!cache [val])	137	if (expect_false (!sviv_cache [val]))
68	{	138	{
69	cache [val] = newSVuv (val);	139	sviv_cache [val] = newSVuv (val);
70	SvREADONLY_on (cache [val]);	140	SvREADONLY_on (sviv_cache [val]);
71	}	141	}
72		142
73	return SvREFCNT_inc_NN (cache [val]);	143	return SvREFCNT_inc_NN (sviv_cache [val]);
74	}	144	}
75		145
76	/////////////////////////////////////////////////////////////////////////////	146	/////////////////////////////////////////////////////////////////////////////
77		147
		148	static HV *profile_stash;
		149
		150	static profile_type *
		151	SvPROFILE (SV *profile)
		152	{
		153	if (!SvOK (profile))
		154	return default_profile;
		155
		156	if (!SvROK (profile))
		157	croak ("Convert::BER::XS::Profile expected");
		158
		159	profile = SvRV (profile);
		160
		161	if (SvSTASH (profile) != profile_stash)
		162	croak ("Convert::BER::XS::Profile expected");
		163
		164	return (void *)profile;
		165	}
		166
		167	static int
		168	profile_lookup (profile_type *profile, int klass, int tag)
		169	{
		170	SV *sv = (SV *)profile;
		171	U32 idx = (tag << 2) + klass;
		172
		173	if (expect_false (idx >= SvCUR (sv)))
		174	return BER_TYPE_BYTES;
		175
		176	return SvPVX (sv)[idx];
		177	}
		178
		179	static void
		180	profile_set (profile_type *profile, int klass, int tag, int type)
		181	{
		182	SV *sv = (SV *)profile;
		183	U32 idx = (tag << 2) + klass;
		184	STRLEN oldlen = SvCUR (sv);
		185	STRLEN newlen = idx + 2;
		186
		187	if (idx >= oldlen)
		188	{
		189	sv_grow (sv, newlen);
		190	memset (SvPVX (sv) + oldlen, BER_TYPE_BYTES, newlen - oldlen);
		191	SvCUR_set (sv, newlen);
		192	}
		193
		194	SvPVX (sv)[idx] = type;
		195	}
		196
		197	static SV *
		198	profile_new (void)
		199	{
		200	SV *sv = newSVpvn ("", 0);
		201
		202	static const struct {
		203	int klass;
		204	int tag;
		205	int type;
		206	} *celem, default_map[] = {
		207	{ ASN_UNIVERSAL, ASN_BOOLEAN , BER_TYPE_BOOL },
		208	{ ASN_UNIVERSAL, ASN_INTEGER , BER_TYPE_INT },
		209	{ ASN_UNIVERSAL, ASN_NULL , BER_TYPE_NULL },
		210	{ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, BER_TYPE_OID },
		211	{ ASN_UNIVERSAL, ASN_RELATIVE_OID , BER_TYPE_RELOID },
		212	{ ASN_UNIVERSAL, ASN_REAL , BER_TYPE_REAL },
		213	{ ASN_UNIVERSAL, ASN_ENUMERATED , BER_TYPE_INT },
		214	{ ASN_UNIVERSAL, ASN_UTF8_STRING , BER_TYPE_UTF8 },
		215	{ ASN_UNIVERSAL, ASN_BMP_STRING , BER_TYPE_UCS2 },
		216	{ ASN_UNIVERSAL, ASN_UNIVERSAL_STRING , BER_TYPE_UCS4 },
		217	};
		218
		219	for (celem = default_map + sizeof (default_map) / sizeof (default_map [0]); celem-- > default_map; )
		220	profile_set ((profile_type *)sv, celem->klass, celem->tag, celem->type);
		221
		222	return sv_bless (newRV_noinc (sv), profile_stash);
		223	}
		224
		225	/////////////////////////////////////////////////////////////////////////////
		226	// decoder
		227
78	static void	228	static void
79	error (const char *errmsg)	229	error (const char *errmsg)
80	{	230	{
81	croak ("%s at offset 0x%04x", errmsg, cur - buf);	231	croak ("%s at offset 0x%04x", errmsg, cur - buf);
82	}	232	}
83		233
84	static int	234	static void
85	need (int count)	235	want (UV count)
86	{	236	{
87	if (count < 0 || (int)rem < count)	237	if (expect_false ((uintptr_t)(end - cur) < count))
88	{
89	error ("unexpected end of message buffer");	238	error ("unexpected end of message buffer");
90	return 0;
91	}
92
93	return 1;
94	}	239	}
95		240
96	// get_* functions fetch something from the buffer	241	// get_* functions fetch something from the buffer
97	// decode_* functions use get_* fun ctions to decode ber values	242	// decode_* functions use get_* fun ctions to decode ber values
98		243
99	static U8 *	244	// 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	245	static U8
114	get_u8 (void)	246	get_u8 (void)
115	{	247	{
116	if (rem <= 0)	248	if (cur == end)
117	{
118	error ("unexpected end of message buffer");	249	error ("unexpected end of message buffer");
119	return 0;
120	}
121		250
122	rem--;
123	return *cur++;	251	return *cur++;
124	}	252	}
125		253
		254	// get n octets
		255	static U8 *
		256	get_n (UV count)
		257	{
		258	want (count);
		259	U8 *res = cur;
		260	cur += count;
		261	return res;
		262	}
		263
		264	// get ber-encoded integer (i.e. pack "w")
126	static U32	265	static UV
127	get_ber (void)	266	get_w (void)
128	{	267	{
129	U32 res = 0;	268	UV res = 0;
		269	U8 c = get_u8 ();
		270
		271	if (expect_false (c == 0x80))
		272	error ("invalid BER padding (X.690 8.1.2.4.2, 8.19.2)");
130		273
131	for (;;)	274	for (;;)
132	{	275	{
133	U8 c = get_u8 ();	276	if (expect_false (res >> UVSIZE * 8 - 7))
		277	error ("BER variable length integer overflow");
		278
134	res = (res << 7) | (c & 0x7f);	279	res = (res << 7) | (c & 0x7f);
135		280
136	if (!(c & 0x80))	281	if (expect_true (!(c & 0x80)))
137	return res;	282	return res;
138	}
139	}
140		283
		284	c = get_u8 ();
		285	}
		286	}
		287
141	static U32	288	static UV
142	get_length (void)	289	get_length (void)
143	{	290	{
144	U32 res = get_u8 ();	291	UV res = get_u8 ();
145		292
146	if (res & 0x80)	293	if (expect_false (res & 0x80))
147	{	294	{
148	int cnt = res & 0x7f;	295	U8 cnt = res & 0x7f;
		296
		297	// this genewrates quite ugly code, but the overhead
		298	// of copying the bytes for these lengths is probably so high
		299	// that a slightly inefficient get_length won't matter.
		300
		301	if (expect_false (cnt == 0))
		302	error ("invalid use of indefinite BER length form in primitive encoding (X.690 8.1.3.2)");
		303
		304	if (expect_false (cnt > UVSIZE))
		305	error ("BER value length too long (must fit into UV) or BER reserved value in length (X.690 8.1.3.5)");
		306
		307	want (cnt);
		308
149	res = 0;	309	res = 0;
150		310	do
151	switch (cnt)	311	res = (res << 8) | *cur++;
152	{	312	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	}	313	}
167		314
168	return res;	315	return res;
169	}	316	}
170		317
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 *	318	static SV *
202	decode_integer32 (void)	319	decode_int (UV len)
203	{	320	{
204	return newSViv ((I32)get_integer32 ());	321	if (!len)
		322	error ("invalid BER_TYPE_INT length zero (X.690 8.3.1)");
		323
		324	U8 *data = get_n (len);
		325
		326	if (expect_false (len > 1))
		327	{
		328	U16 mask = (data [0] << 8) | data [1] & 0xff80;
		329
		330	if (expect_false (mask == 0xff80 || mask == 0x0000))
		331	error ("invalid padding in BER_TYPE_INT (X.690 8.3.2)");
		332	}
		333
		334	int negative = data [0] & 0x80;
		335
		336	UV val = negative ? -1 : 0; // copy signbit to all bits
		337
		338	if (len > UVSIZE + (!negative && !*data))
		339	error ("BER_TYPE_INT overflow");
		340
		341	do
		342	val = (val << 8) | *data++;
		343	while (--len);
		344
		345	// the cast to IV relies on implementation-defined behaviour (two's complement cast)
		346	// but that's ok, as perl relies on it as well.
		347	return negative ? newSViv ((IV)val) : newSVuv (val);
205	}	348	}
206		349
207	static SV *	350	static SV *
208	decode_unsigned32 (void)	351	decode_data (UV len)
209	{	352	{
210	return newSVuv ((U32)get_integer32 ());	353	return newSVpvn ((char *)get_n (len), len);
211	}	354	}
212		355
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	356	// helper for decode_object_identifier
275	static char *	357	static char *
276	write_uv (char *buf, U32 u)	358	write_uv (char *buf, UV u)
277	{	359	{
278	// the one-digit case is absolutely predominant, so this pays off (hopefully)	360	// the one-digit case is absolutely predominant, so this pays off (hopefully)
279	if (u < 10)	361	if (expect_true (u < 10))
280	*buf++ = u + '0';	362	*buf++ = u + '0';
281	else	363	else
282	{	364	{
		365	// this *could* be done much faster using branchless fixed-point arithmetics
283	char *beg = buf;	366	char *beg = buf;
284		367
285	do	368	do
286	{	369	{
287	*buf++ = u % 10 + '0';	370	*buf++ = u % 10 + '0';
288	u /= 10;	371	u /= 10;
289	}	372	}
290	while (u);	373	while (u);
291		374
292	// reverse digits	375	// reverse digits
293	for (char *ptr = buf; --ptr != beg; ++beg)	376	char *ptr = buf;
		377	while (--ptr > beg)
294	{	378	{
295	char c = *ptr;	379	char c = *ptr;
296	*ptr = *beg;	380	*ptr = *beg;
297	*beg = c;	381	*beg = c;
		382	++beg;
298	}	383	}
299	}	384	}
300		385
301	return buf;	386	return buf;
302	}	387	}
303		388
304	static SV *	389	static SV *
305	decode_object_identifier (void)	390	decode_oid (UV len, int relative)
306	{	391	{
307	U32 length = get_length ();
308
309	if (length <= 0)	392	if (len <= 0)
310	{	393	{
311	error ("OBJECT IDENTIFIER length equal to zero");	394	error ("BER_TYPE_OID length must not be zero");
312	return &PL_sv_undef;	395	return &PL_sv_undef;
313	}	396	}
314		397
315	U8 *end = cur + length;	398	U8 *end = cur + len;
316	U32 w = get_ber ();	399	UV w = get_w ();
317		400
318	static char oid[MAX_OID_STRLEN]; // must be static	401	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
319	char *app = oid;	402	char *app = oid;
320		403
		404	if (relative)
321	app = write_uv (app, (U8)w / 40);	405	app = write_uv (app, w);
		406	else
		407	{
		408	UV w1, w2;
		409
		410	if (w < 2 * 40)
		411	(w1 = w / 40), (w2 = w % 40);
		412	else
		413	(w1 = 2), (w2 = w - 2 * 40);
		414
		415	app = write_uv (app, w1);
322	*app++ = '.';	416	*app++ = '.';
323	app = write_uv (app, (U8)w % 40);	417	app = write_uv (app, w2);
		418	}
324		419
		420	while (cur < end)
		421	{
325	// we assume an oid component is never > 64 bytes	422	// we assume an oid component is never > 64 digits
326	while (cur < end && oid + sizeof (oid) - app > 64)	423	if (oid + sizeof (oid) - app < 64)
327	{	424	croak ("BER_TYPE_OID to long to decode");
		425
328	w = get_ber ();	426	w = get_w ();
329	*app++ = '.';	427	*app++ = '.';
330	app = write_uv (app, w);	428	app = write_uv (app, w);
331	}	429	}
332		430
333	return newSVpvn (oid, app - oid);	431	return newSVpvn (oid, app - oid);
334	}	432	}
335		433
		434	// oh my, this is a total mess
336	static SV *	435	static SV *
		436	decode_real (UV len)
		437	{
		438	SV *res;
		439	U8 *beg = cur;
		440
		441	if (len == 0)
		442	res = newSVnv (0.);
		443	else
		444	{
		445	U8 info = get_u8 ();
		446
		447	if (info & 0x80)
		448	{
		449	// binary
		450	static const U8 base[] = { 2, 8, 16, 0 };
		451	NV S = info & 0x40 ? -1 : 1; // sign
		452	NV B = base [(info >> 4) & 3]; // base
		453	NV F = 1 << ((info >> 2) & 3); // scale factor ("shift")
		454	int L = info & 3; // exponent length
		455
		456	if (!B)
		457	croak ("BER_TYPE_REAL binary encoding uses invalid base (0x%02x)", info);
		458
		459	SAVETMPS;
		460
		461	SV *E = sv_2mortal (decode_int (L == 3 ? get_u8 () : L + 1));
		462	SV *M = sv_2mortal (decode_int (len - (cur - beg)));
		463
		464	res = newSVnv (S * SvNV (M) * F * Perl_pow (B, SvNV (E)));
		465
		466	FREETMPS;
		467	}
		468	else if (info & 0x40)
		469	{
		470	// SpecialRealValue
		471	U8 special = get_u8 ();
		472	NV val;
		473
		474	switch (special)
		475	{
		476	case 0x40: val = NV_INF; break;
		477	case 0x41: val = -NV_INF; break;
		478	case 0x42: val = NV_NAN; break;
		479	case 0x43: val = -(NV)0.; break;
		480
		481	default:
		482	croak ("BER_TYPE_REAL SpecialRealValues invalid encoding 0x%02x (X.690 8.5.9)", special);
		483	}
		484
		485	res = newSVnv (val);
		486	}
		487	else
		488	{
		489	// decimal
		490	dSP;
		491	SAVETMPS;
		492	PUSHMARK (SP);
		493	EXTEND (SP, 2);
		494	PUSHs (sv_2mortal (newSVcacheint (info & 0x3f)));
		495	PUSHs (sv_2mortal (newSVpvn (get_n (len - 1), len - 1)));
		496	PUTBACK;
		497	call_pv ("Convert::BER::XS::_decode_real_decimal", G_SCALAR);
		498	SPAGAIN;
		499	res = SvREFCNT_inc_NN (POPs);
		500	PUTBACK;
		501	FREETMPS;
		502	}
		503	}
		504
		505	if (cur - beg != len)
		506	{
		507	SvREFCNT_dec_NN (res);
		508	croak ("BER_TYPE_REAL invalid content length (X.690 8,5)");
		509	}
		510
		511	return res;
		512	}
		513
		514	// TODO: this is unacceptably slow
		515	static SV *
		516	decode_ucs (UV len, int chrsize)
		517	{
		518	if (len & (chrsize - 1))
		519	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		520
		521	SV *res = NEWSV (0, 0);
		522
		523	while (len)
		524	{
		525	U8 b1 = get_u8 ();
		526	U8 b2 = get_u8 ();
		527	U32 chr = (b1 << 8) | b2;
		528
		529	if (chrsize == 4)
		530	{
		531	U8 b3 = get_u8 ();
		532	U8 b4 = get_u8 ();
		533	chr = (chr << 16) | (b3 << 8) | b4;
		534	}
		535
		536	U8 uchr [UTF8_MAXBYTES];
		537	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		538
		539	sv_catpvn (res, (const char *)uchr, uclen);
		540	len -= chrsize;
		541	}
		542
		543	SvUTF8_on (res);
		544
		545	return res;
		546	}
		547
		548	static SV *
337	decode_ber ()	549	decode_ber (void)
338	{	550	{
339	int identifier = get_u8 ();	551	int identifier = get_u8 ();
340		552
341	SV *res;	553	SV *res;
342		554
343	int constructed = identifier & ASN_CONSTRUCTED;	555	int constructed = identifier & ASN_CONSTRUCTED;
344	int klass = identifier & ASN_CLASS_MASK;	556	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
345	int tag = identifier & ASN_TAG_MASK;	557	int tag = identifier & ASN_TAG_MASK;
346		558
347	if (tag == ASN_TAG_BER)	559	if (tag == ASN_TAG_BER)
348	tag = get_ber ();	560	tag = get_w ();
349
350	if (tag == ASN_TAG_BER)
351	tag = get_ber ();
352		561
353	if (constructed)	562	if (constructed)
354	{	563	{
355	U32 len = get_length ();	564	want (1);
356	U32 seqend = (cur - buf) + len;
357	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	565	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
358		566
359	while (cur < buf + seqend)	567	if (expect_false (*cur == 0x80))
		568	{
		569	// indefinite length
		570	++cur;
		571
		572	for (;;)
		573	{
		574	want (2);
		575	if (!cur [0] && !cur [1])
		576	{
		577	cur += 2;
		578	break;
		579	}
		580
360	av_push (av, decode_ber ());	581	av_push (av, decode_ber ());
		582	}
		583	}
		584	else
		585	{
		586	UV len = get_length ();
		587	UV seqend = (cur - buf) + len;
361		588
362	if (cur > buf + seqend)	589	while (cur < buf + seqend)
		590	av_push (av, decode_ber ());
		591
		592	if (expect_false (cur > buf + seqend))
363	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	593	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
		594	}
364		595
365	res = newRV_inc ((SV *)av);	596	res = newRV_inc ((SV *)av);
366	}	597	}
367	else	598	else
368	switch (identifier)	599	{
		600	UV len = get_length ();
		601
		602	switch (profile_lookup (cur_profile, klass, tag))
369	{	603	{
370	case ASN_NULL:	604	case BER_TYPE_NULL:
		605	if (expect_false (len))
		606	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		607
371	res = &PL_sv_undef;	608	res = &PL_sv_undef;
372	break;	609	break;
373		610
374	case ASN_OBJECT_IDENTIFIER:	611	case BER_TYPE_BOOL:
375	res = decode_object_identifier ();	612	if (expect_false (len != 1))
		613	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
		614
		615	res = newSVcacheint (!!get_u8 ());
376	break;	616	break;
377		617
378	case ASN_INTEGER32:	618	case BER_TYPE_OID:
379	res = decode_integer32 ();	619	res = decode_oid (len, 0);
380	break;	620	break;
381		621
382	case ASN_APPLICATION | ASN_UNSIGNED32:	622	case BER_TYPE_RELOID:
383	case ASN_APPLICATION | ASN_COUNTER32:	623	res = decode_oid (len, 1);
384	case ASN_APPLICATION | ASN_TIMETICKS:
385	res = decode_unsigned32 ();
386	break;	624	break;
387		625
388	#if 0 // handled by default case	626	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 ();	627	res = decode_int (len);
393	break;	628	break;
394	#endif
395		629
396	case ASN_APPLICATION | ASN_COUNTER64:	630	case BER_TYPE_UTF8:
397	res = decode_integer64 ();	631	res = decode_data (len);
		632	SvUTF8_on (res);
398	break;	633	break;
399		634
400	default:	635	case BER_TYPE_BYTES:
401	res = decode_octet_string ();	636	res = decode_data (len);
402	break;	637	break;
		638
		639	case BER_TYPE_IPADDRESS:
		640	{
		641	if (len != 4)
		642	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		643
		644	U8 *data = get_n (4);
		645	res = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]);
		646	}
		647	break;
		648
		649	case BER_TYPE_UCS2:
		650	res = decode_ucs (len, 2);
		651	break;
		652
		653	case BER_TYPE_UCS4:
		654	res = decode_ucs (len, 4);
		655	break;
		656
		657	case BER_TYPE_REAL:
		658	res = decode_real (len);
		659	break;
		660
		661	case BER_TYPE_CROAK:
		662	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		663
		664	default:
		665	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
403	}	666	}
		667	}
404		668
405	AV *av = newAV ();	669	AV *av = newAV ();
406	av_fill (av, BER_ARRAYSIZE - 1);	670	av_fill (av, BER_ARRAYSIZE - 1);
407	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	671	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
408	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	672	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
409	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	673	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
410	AvARRAY (av)[BER_DATA ] = res;	674	AvARRAY (av)[BER_DATA ] = res;
411		675
412	return newRV_noinc ((SV *)av);	676	return newRV_noinc ((SV *)av);
413	}	677	}
414		678
		679	/////////////////////////////////////////////////////////////////////////////
		680	// encoder
		681
		682	/* adds two STRLENs together, slow, and with paranoia */
		683	static STRLEN
		684	strlen_sum (STRLEN l1, STRLEN l2)
		685	{
		686	size_t sum = l1 + l2;
		687
		688	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		689	croak ("Convert::BER::XS: string size overflow");
		690
		691	return sum;
		692	}
		693
		694	static void
		695	set_buf (SV *sv)
		696	{
		697	STRLEN len;
		698	buf_sv = sv;
		699	buf = (U8 *)SvPVbyte (buf_sv, len);
		700	cur = buf;
		701	end = buf + len;
		702	}
		703
		704	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		705	static char *
		706	my_sv_grow (SV *sv, size_t len1, size_t len2)
		707	{
		708	len1 = strlen_sum (len1, len2);
		709	len1 = strlen_sum (len1, len1 >> 1);
		710
		711	if (len1 > 4096 - 24)
		712	len1 = (len1 | 4095) - 24;
		713
		714	return SvGROW (sv, len1);
		715	}
		716
		717	static void
		718	need (STRLEN len)
		719	{
		720	if (expect_false ((uintptr_t)(end - cur) < len))
		721	{
		722	STRLEN pos = cur - buf;
		723	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		724	cur = buf + pos;
		725	end = buf + SvLEN (buf_sv) - 1;
		726	}
		727	}
		728
		729	static void
		730	put_u8 (int val)
		731	{
		732	need (1);
		733	*cur++ = val;
		734	}
		735
		736	static void
		737	put_w_nocheck (UV val)
		738	{
		739	#if UVSIZE > 4
		740	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		741	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		742	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		743	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		744	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		745	#endif
		746	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		747	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		748	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		749	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		750	*cur = val & 0x7f; cur += 1;
		751	}
		752
		753	static void
		754	put_w (UV val)
		755	{
		756	need (5); // we only handle up to 5 bytes
		757
		758	put_w_nocheck (val);
		759	}
		760
		761	static U8 *
		762	put_length_at (UV val, U8 *cur)
		763	{
		764	if (val <= 0x7fU)
		765	*cur++ = val;
		766	else
		767	{
		768	U8 *lenb = cur++;
		769
		770	#if UVSIZE > 4
		771	*cur = val >> 56; cur += val >= ((UV)1 << (8 * 7));
		772	*cur = val >> 48; cur += val >= ((UV)1 << (8 * 6));
		773	*cur = val >> 40; cur += val >= ((UV)1 << (8 * 5));
		774	*cur = val >> 32; cur += val >= ((UV)1 << (8 * 4));
		775	#endif
		776	*cur = val >> 24; cur += val >= ((UV)1 << (8 * 3));
		777	*cur = val >> 16; cur += val >= ((UV)1 << (8 * 2));
		778	*cur = val >> 8; cur += val >= ((UV)1 << (8 * 1));
		779	*cur = val ; cur += 1;
		780
		781	*lenb = 0x80 + cur - lenb - 1;
		782	}
		783
		784	return cur;
		785	}
		786
		787	static void
		788	put_length (UV val)
		789	{
		790	need (9 + val);
		791	cur = put_length_at (val, cur);
		792	}
		793
		794	// return how many bytes the encoded length requires
		795	static int length_length (UV val)
		796	{
		797	// use hashing with a DeBruin sequence, anyone?
		798	return expect_true (val <= 0x7fU)
		799	? 1
		800	: 2
		801	+ (val > 0x000000000000ffU)
		802	+ (val > 0x0000000000ffffU)
		803	+ (val > 0x00000000ffffffU)
		804	#if UVSIZE > 4
		805	+ (val > 0x000000ffffffffU)
		806	+ (val > 0x0000ffffffffffU)
		807	+ (val > 0x00ffffffffffffU)
		808	+ (val > 0xffffffffffffffU)
		809	#endif
		810	;
		811	}
		812
		813	static void
		814	encode_data (const char *ptr, STRLEN len)
		815	{
		816	put_length (len);
		817	memcpy (cur, ptr, len);
		818	cur += len;
		819	}
		820
		821	static void
		822	encode_uv (UV uv)
		823	{
		824	}
		825
		826	static void
		827	encode_int (SV *sv)
		828	{
		829	need (8 + 1 + 1); // 64 bit + length + extra 0
		830
		831	if (expect_false (!SvIOK (sv)))
		832	sv_2iv_flags (sv, 0);
		833
		834	U8 *lenb = cur++;
		835
		836	if (SvIOK_notUV (sv))
		837	{
		838	IV iv = SvIVX (sv);
		839
		840	if (expect_false (iv < 0))
		841	{
		842	// get two's complement bit pattern - works even on hypothetical non-2c machines
		843	UV uv = iv;
		844
		845	#if UVSIZE > 4
		846	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		847	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		848	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		849	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		850	#endif
		851	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		852	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		853	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		854	*cur = uv ; cur += 1;
		855
		856	*lenb = cur - lenb - 1;
		857
		858	return;
		859	}
		860	}
		861
		862	UV uv = SvUV (sv);
		863
		864	// prepend an extra 0 if the high bit is 1
		865	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		866
		867	#if UVSIZE > 4
		868	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		869	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		870	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		871	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		872	#endif
		873	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		874	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		875	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		876	*cur = uv ; cur += 1;
		877
		878	*lenb = cur - lenb - 1;
		879	}
		880
		881	// we don't know the length yet, so we optimistically
		882	// assume the length will need one octet later. If that
		883	// turns out to be wrong, we memmove as needed.
		884	// mark the beginning
		885	static STRLEN
		886	len_fixup_mark (void)
		887	{
		888	return cur++ - buf;
		889	}
		890
		891	// patch up the length
		892	static void
		893	len_fixup (STRLEN mark)
		894	{
		895	STRLEN reallen = (cur - buf) - mark - 1;
		896	int lenlen = length_length (reallen);
		897
		898	if (expect_false (lenlen > 1))
		899	{
		900	// bad luck, we have to shift the bytes to make room for the length
		901	need (5);
		902	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		903	cur += lenlen - 1;
		904	}
		905
		906	put_length_at (reallen, buf + mark);
		907	}
		908
		909	static char *
		910	read_uv (char *str, UV *uv)
		911	{
		912	UV r = 0;
		913
		914	while (*str >= '0')
		915	r = r * 10 + *str++ - '0';
		916
		917	*uv = r;
		918
		919	str += !!*str; // advance over any non-zero byte
		920
		921	return str;
		922	}
		923
		924	static void
		925	encode_oid (SV *oid, int relative)
		926	{
		927	STRLEN len;
		928	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		929
		930	// we need at most as many octets as the string form
		931	need (len + 1);
		932	STRLEN mark = len_fixup_mark ();
		933
		934	UV w1, w2;
		935
		936	if (!relative)
		937	{
		938	ptr = read_uv (ptr, &w1);
		939	ptr = read_uv (ptr, &w2);
		940
		941	put_w_nocheck (w1 * 40 + w2);
		942	}
		943
		944	while (*ptr)
		945	{
		946	ptr = read_uv (ptr, &w1);
		947	put_w_nocheck (w1);
		948	}
		949
		950	len_fixup (mark);
		951	}
		952
		953	static void
		954	encode_real (SV *data)
		955	{
		956	NV nv = SvNV (data);
		957
		958	if (expect_false (nv == (NV)0.))
		959	{
		960	if (signbit (nv))
		961	{
		962	// negative zero
		963	need (3);
		964	*cur++ = 2;
		965	*cur++ = 0x40;
		966	*cur++ = 0x43;
		967	}
		968	else
		969	{
		970	// positive zero
		971	need (1);
		972	*cur++ = 0;
		973	}
		974	}
		975	else if (expect_false (Perl_isinf (nv)))
		976	{
		977	need (3);
		978	*cur++ = 2;
		979	*cur++ = 0x40;
		980	*cur++ = nv < (NV)0. ? 0x41 : 0x40;
		981	}
		982	else if (expect_false (Perl_isnan (nv)))
		983	{
		984	need (3);
		985	*cur++ = 2;
		986	*cur++ = 0x40;
		987	*cur++ = 0x42;
		988	}
		989	else
		990	{
		991	// use decimal encoding
		992	dSP;
		993	SAVETMPS;
		994	PUSHMARK (SP);
		995	EXTEND (SP, 2);
		996	PUSHs (data);
		997	PUSHs (sv_2mortal (newSVcacheint (NV_DIG)));
		998	PUTBACK;
		999	call_pv ("Convert::BER::XS::_encode_real_decimal", G_SCALAR);
		1000	SPAGAIN;
		1001
		1002	SV *sv = POPs;
		1003	STRLEN l;
		1004	char *f = SvPV (sv, l);
		1005
		1006	put_length (l);
		1007	memcpy (cur, f, l);
		1008	cur += l;
		1009
		1010	PUTBACK;
		1011	FREETMPS;
		1012	}
		1013	}
		1014
		1015	static void
		1016	encode_ucs (SV *data, int chrsize)
		1017	{
		1018	STRLEN uchars = sv_len_utf8 (data);
		1019	STRLEN len;;
		1020	char *ptr = SvPVutf8 (data, len);
		1021
		1022	put_length (uchars * chrsize);
		1023
		1024	while (uchars--)
		1025	{
		1026	STRLEN uclen;
		1027	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		1028
		1029	ptr += uclen;
		1030	len -= uclen;
		1031
		1032	if (chrsize == 4)
		1033	{
		1034	*cur++ = uchr >> 24;
		1035	*cur++ = uchr >> 16;
		1036	}
		1037
		1038	*cur++ = uchr >> 8;
		1039	*cur++ = uchr;
		1040	}
		1041	}
		1042
		1043	// check whether an SV is a BER tuple and returns its AV *
		1044	static AV *
		1045	ber_tuple (SV *tuple)
		1046	{
		1047	SV *rv;
		1048
		1049	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		1050	croak ("BER tuple must be array-reference");
		1051
		1052	if (expect_false (SvRMAGICAL (rv)))
		1053	croak ("BER tuple must not be tied");
		1054
		1055	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		1056	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		1057
		1058	return (AV *)rv;
		1059	}
		1060
		1061	static void
		1062	encode_ber (SV *tuple)
		1063	{
		1064	AV *av = ber_tuple (tuple);
		1065
		1066	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		1067	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		1068	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		1069	SV *data = AvARRAY (av)[BER_DATA];
		1070
		1071	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		1072
		1073	if (expect_false (tag >= ASN_TAG_BER))
		1074	{
		1075	put_u8 (identifier | ASN_TAG_BER);
		1076	put_w (tag);
		1077	}
		1078	else
		1079	put_u8 (identifier | tag);
		1080
		1081	if (constructed)
		1082	{
		1083	// we optimistically assume that only one length byte is needed
		1084	// and adjust later
		1085	need (1);
		1086	STRLEN mark = len_fixup_mark ();
		1087
		1088	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		1089	croak ("BER CONSTRUCTED data must be array-reference");
		1090
		1091	AV *av = (AV *)SvRV (data);
		1092	int fill = AvFILL (av);
		1093
		1094	if (expect_false (SvRMAGICAL (av)))
		1095	croak ("BER CONSTRUCTED data must not be tied");
		1096
		1097	int i;
		1098	for (i = 0; i <= fill; ++i)
		1099	encode_ber (AvARRAY (av)[i]);
		1100
		1101	len_fixup (mark);
		1102	}
		1103	else
		1104	switch (profile_lookup (cur_profile, klass, tag))
		1105	{
		1106	case BER_TYPE_NULL:
		1107	put_length (0);
		1108	break;
		1109
		1110	case BER_TYPE_BOOL:
		1111	put_length (1);
		1112	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		1113	break;
		1114
		1115	case BER_TYPE_OID:
		1116	encode_oid (data, 0);
		1117	break;
		1118
		1119	case BER_TYPE_RELOID:
		1120	encode_oid (data, 1);
		1121	break;
		1122
		1123	case BER_TYPE_INT:
		1124	encode_int (data);
		1125	break;
		1126
		1127	case BER_TYPE_BYTES:
		1128	{
		1129	STRLEN len;
		1130	const char *ptr = SvPVbyte (data, len);
		1131	encode_data (ptr, len);
		1132	}
		1133	break;
		1134
		1135	case BER_TYPE_UTF8:
		1136	{
		1137	STRLEN len;
		1138	const char *ptr = SvPVutf8 (data, len);
		1139	encode_data (ptr, len);
		1140	}
		1141	break;
		1142
		1143	case BER_TYPE_IPADDRESS:
		1144	{
		1145	U8 ip[4];
		1146	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		1147	encode_data ((const char *)ip, sizeof (ip));
		1148	}
		1149	break;
		1150
		1151	case BER_TYPE_UCS2:
		1152	encode_ucs (data, 2);
		1153	break;
		1154
		1155	case BER_TYPE_UCS4:
		1156	encode_ucs (data, 4);
		1157	break;
		1158
		1159	case BER_TYPE_REAL:
		1160	encode_real (data);
		1161	break;
		1162
		1163	case BER_TYPE_CROAK:
		1164	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		1165
		1166	default:
		1167	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		1168	}
		1169
		1170	}
		1171
		1172	/////////////////////////////////////////////////////////////////////////////
		1173
415	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1174	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
416		1175
417	PROTOTYPES: ENABLE	1176	PROTOTYPES: ENABLE
418		1177
419	BOOT:	1178	BOOT:
420	{	1179	{
421	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1180	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1181
		1182	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
422		1183
423	static const struct {	1184	static const struct {
424	const char *name;	1185	const char *name;
425	IV iv;	1186	IV iv;
426	} *civ, const_iv[] = {	1187	} *civ, const_iv[] = {
427	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1188	#define const_iv(name) { # name, name },
428	{ "ASN_INTEGER32", ASN_INTEGER32 },	1189	const_iv (ASN_BOOLEAN)
429	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1190	const_iv (ASN_INTEGER)
430	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1191	const_iv (ASN_BIT_STRING)
431	{ "ASN_NULL", ASN_NULL },	1192	const_iv (ASN_OCTET_STRING)
432	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1193	const_iv (ASN_NULL)
433	{ "ASN_TAG_BER", ASN_TAG_BER },	1194	const_iv (ASN_OBJECT_IDENTIFIER)
434	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1195	const_iv (ASN_OBJECT_DESCRIPTOR)
435	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1196	const_iv (ASN_OID)
436	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1197	const_iv (ASN_EXTERNAL)
437	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1198	const_iv (ASN_REAL)
438	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1199	const_iv (ASN_SEQUENCE)
439	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1200	const_iv (ASN_ENUMERATED)
440	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1201	const_iv (ASN_EMBEDDED_PDV)
441	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1202	const_iv (ASN_UTF8_STRING)
442	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1203	const_iv (ASN_RELATIVE_OID)
443	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1204	const_iv (ASN_SET)
444	{ "ASN_COUNTER32", ASN_COUNTER32 },	1205	const_iv (ASN_NUMERIC_STRING)
445	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1206	const_iv (ASN_PRINTABLE_STRING)
446	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1207	const_iv (ASN_TELETEX_STRING)
447	{ "ASN_OPAQUE", ASN_OPAQUE },	1208	const_iv (ASN_T61_STRING)
448	{ "ASN_COUNTER64", ASN_COUNTER64 },	1209	const_iv (ASN_VIDEOTEX_STRING)
		1210	const_iv (ASN_IA5_STRING)
		1211	const_iv (ASN_ASCII_STRING)
		1212	const_iv (ASN_UTC_TIME)
		1213	const_iv (ASN_GENERALIZED_TIME)
		1214	const_iv (ASN_GRAPHIC_STRING)
		1215	const_iv (ASN_VISIBLE_STRING)
		1216	const_iv (ASN_ISO646_STRING)
		1217	const_iv (ASN_GENERAL_STRING)
		1218	const_iv (ASN_UNIVERSAL_STRING)
		1219	const_iv (ASN_CHARACTER_STRING)
		1220	const_iv (ASN_BMP_STRING)
449		1221
450	{ "BER_CLASS" , BER_CLASS },	1222	const_iv (ASN_UNIVERSAL)
451	{ "BER_TAG" , BER_TAG },	1223	const_iv (ASN_APPLICATION)
452	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1224	const_iv (ASN_CONTEXT)
453	{ "BER_DATA" , BER_DATA },	1225	const_iv (ASN_PRIVATE)
		1226
		1227	const_iv (BER_CLASS)
		1228	const_iv (BER_TAG)
		1229	const_iv (BER_FLAGS)
		1230	const_iv (BER_DATA)
		1231
		1232	const_iv (BER_TYPE_BYTES)
		1233	const_iv (BER_TYPE_UTF8)
		1234	const_iv (BER_TYPE_UCS2)
		1235	const_iv (BER_TYPE_UCS4)
		1236	const_iv (BER_TYPE_INT)
		1237	const_iv (BER_TYPE_OID)
		1238	const_iv (BER_TYPE_RELOID)
		1239	const_iv (BER_TYPE_NULL)
		1240	const_iv (BER_TYPE_BOOL)
		1241	const_iv (BER_TYPE_REAL)
		1242	const_iv (BER_TYPE_IPADDRESS)
		1243	const_iv (BER_TYPE_CROAK)
		1244
		1245	const_iv (SNMP_IPADDRESS)
		1246	const_iv (SNMP_COUNTER32)
		1247	const_iv (SNMP_GAUGE32)
		1248	const_iv (SNMP_UNSIGNED32)
		1249	const_iv (SNMP_TIMETICKS)
		1250	const_iv (SNMP_OPAQUE)
		1251	const_iv (SNMP_COUNTER64)
454	};	1252	};
455		1253
456	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1254	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));	1255	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
458	}	1256	}
459		1257
460	SV *	1258	void
461	ber_decode (SV *ber)	1259	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1260	ALIAS:
		1261	ber_decode_prefix = 1
462	CODE:	1262	PPCODE:
463	{	1263	{
		1264	cur_profile = SvPROFILE (profile);
		1265	STRLEN len;
464	buf = SvPVbyte (ber, len);	1266	buf = (U8 *)SvPVbyte (ber, len);
465	cur = buf;	1267	cur = buf;
466	rem = len;	1268	end = buf + len;
467		1269
		1270	PUTBACK;
468	RETVAL = decode_ber ();	1271	SV *tuple = decode_ber ();
		1272	SPAGAIN;
		1273
		1274	EXTEND (SP, 2);
		1275	PUSHs (sv_2mortal (tuple));
		1276
		1277	if (ix)
		1278	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1279	else if (cur != end)
		1280	error ("trailing garbage after BER value");
469	}	1281	}
470	OUTPUT: RETVAL
471		1282
472	void	1283	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)	1284	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:	1285	PPCODE:
476	{	1286	{
477	if (!SvOK (tuple))	1287	if (!SvOK (tuple))
478	XSRETURN_NO;	1288	XSRETURN_NO;
479		1289
480	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1290	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
481	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1291	croak ("ber_is: tuple must be BER tuple (array-ref)");
482		1292
483	AV *av = (AV *)SvRV (tuple);	1293	AV *av = (AV *)SvRV (tuple);
484		1294
485	XPUSHs (	1295	XPUSHs (
486	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1296	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
487	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1297	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
488	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1298	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
489	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1299	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
490	? &PL_sv_yes : &PL_sv_no);	1300	? &PL_sv_yes : &PL_sv_undef);
491	}	1301	}
492		1302
493	void	1303	void
494	ber_is_seq (SV *tuple)	1304	ber_is_seq (SV *tuple)
495	PROTOTYPE: $
496	PPCODE:	1305	PPCODE:
497	{	1306	{
498	if (!SvOK (tuple))	1307	if (!SvOK (tuple))
499	XSRETURN_UNDEF;	1308	XSRETURN_UNDEF;
500		1309
501	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1310	AV *av = ber_tuple (tuple);
502	croak ("ber_seq: tuple must be ber tuple (array-ref)");
503
504	AV *av = (AV *)SvRV (tuple);
505		1311
506	XPUSHs (	1312	XPUSHs (
507	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1313	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
508	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1314	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
509	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1315	&& SvIV (AvARRAY (av)[BER_FLAGS])
510	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1316	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
511	}	1317	}
512		1318
513	void	1319	void
514	ber_is_i32 (SV *tuple, IV value)	1320	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
515	PROTOTYPE: $$
516	PPCODE:	1321	PPCODE:
517	{	1322	{
518	if (!SvOK (tuple))	1323	if (!SvOK (tuple))
519	XSRETURN_NO;	1324	XSRETURN_NO;
520		1325
521	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1326	AV *av = ber_tuple (tuple);
522	croak ("ber_seq: tuple must be ber tuple (array-ref)");
523		1327
524	AV *av = (AV *)SvRV (tuple);	1328	UV data = SvUV (AvARRAY (av)[BER_DATA]);
525		1329
526	XPUSHs (	1330	XPUSHs (
527	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1331	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
528	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1332	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
529	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1333	&& !SvIV (AvARRAY (av)[BER_FLAGS])
530	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1334	&& (!SvOK (value) || data == SvUV (value))
531	? &PL_sv_yes : &PL_sv_no);	1335	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1336	: &PL_sv_undef);
532	}	1337	}
533		1338
534	void	1339	void
535	ber_is_oid (SV *tuple, SV *oid)	1340	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
536	PROTOTYPE: $$
537	PPCODE:	1341	PPCODE:
538	{	1342	{
539	if (!SvOK (tuple))	1343	if (!SvOK (tuple))
540	XSRETURN_NO;	1344	XSRETURN_NO;
541		1345
542	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1346	AV *av = ber_tuple (tuple);
543	croak ("ber_seq: tuple must be ber tuple (array-ref)");
544
545	AV *av = (AV *)SvRV (tuple);
546		1347
547	XPUSHs (	1348	XPUSHs (
548	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1349	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
549	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1350	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
550	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1351	&& !SvIV (AvARRAY (av)[BER_FLAGS])
551	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1352	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
552	? &PL_sv_yes : &PL_sv_no);	1353	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
553	}	1354	}
554		1355
		1356	#############################################################################
		1357
		1358	void
		1359	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1360	PPCODE:
		1361	{
		1362	cur_profile = SvPROFILE (profile);
		1363	buf_sv = sv_2mortal (NEWSV (0, 256));
		1364	SvPOK_only (buf_sv);
		1365	set_buf (buf_sv);
		1366
		1367	PUTBACK;
		1368	encode_ber (tuple);
		1369	SPAGAIN;
		1370
		1371	SvCUR_set (buf_sv, cur - buf);
		1372	XPUSHs (buf_sv);
		1373	}
		1374
		1375	SV *
		1376	ber_int (SV *sv)
		1377	CODE:
		1378	{
		1379	AV *av = newAV ();
		1380	av_fill (av, BER_ARRAYSIZE - 1);
		1381	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1382	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1383	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1384	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1385	RETVAL = newRV_noinc ((SV *)av);
		1386	}
		1387	OUTPUT: RETVAL
		1388
		1389	# TODO: not arrayref, but elements?
		1390	SV *
		1391	ber_seq (SV *arrayref)
		1392	CODE:
		1393	{
		1394	AV *av = newAV ();
		1395	av_fill (av, BER_ARRAYSIZE - 1);
		1396	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1397	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1398	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1399	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1400	RETVAL = newRV_noinc ((SV *)av);
		1401	}
		1402	OUTPUT: RETVAL
		1403
		1404	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1405
		1406	SV *
		1407	new (SV *klass)
		1408	CODE:
		1409	RETVAL = profile_new ();
		1410	OUTPUT: RETVAL
		1411
		1412	void
		1413	set (SV *profile, int klass, int tag, int type)
		1414	CODE:
		1415	profile_set (SvPROFILE (profile), klass, tag, type);
		1416
		1417	IV
		1418	get (SV *profile, int klass, int tag)
		1419	CODE:
		1420	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1421	OUTPUT: RETVAL
		1422
		1423	void
		1424	_set_default (SV *profile)
		1425	CODE:
		1426	default_profile = SvPROFILE (profile);
		1427
		1428

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