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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 1.20 by root, Sat Apr 20 17:04:35 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,
35	ASN_UNSIGNED32 = 0x02,	63	SNMP_UNSIGNED32 = 0x02,
36	ASN_TIMETICKS = 0x03,	64	SNMP_TIMETICKS = 0x03,
37	ASN_OPAQUE = 0x04,	65	SNMP_OPAQUE = 0x04,
38	ASN_COUNTER64 = 0x06,	66	SNMP_COUNTER64 = 0x06,
39	};	67	};
40		68
41	enum {	69	enum {
		70	BER_TYPE_BYTES,
		71	BER_TYPE_UTF8,
		72	BER_TYPE_UCS2,
		73	BER_TYPE_UCS4,
		74	BER_TYPE_INT,
		75	BER_TYPE_OID,
		76	BER_TYPE_RELOID,
		77	BER_TYPE_NULL,
		78	BER_TYPE_BOOL,
		79	BER_TYPE_REAL,
		80	BER_TYPE_IPADDRESS,
		81	BER_TYPE_CROAK,
		82	};
		83
		84	enum {
42	BER_CLASS = 0,	85	BER_CLASS = 0,
43	BER_TAG = 1,	86	BER_TAG = 1,
44	BER_CONSTRUCTED = 2,	87	BER_FLAGS = 2,
45	BER_DATA = 3,	88	BER_DATA = 3,
46	BER_ARRAYSIZE	89	BER_ARRAYSIZE
47	};	90	};
48		91
49	#define MAX_OID_STRLEN 4096	92	#define MAX_OID_STRLEN 4096
50		93
51	static U8 *buf, *cur;	94	typedef void profile_type;
52	static STRLEN len, rem;	95
		96	static profile_type *cur_profile, *default_profile;
		97	static SV *buf_sv; // encoding buffer
		98	static U8 *buf, *cur, *end; // buffer start, current, end
		99
		100	#if PERL_VERSION < 18
		101	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
		102	#endif
		103
		104	#if __GNUC__ >= 3
		105	# define expect(expr,value) __builtin_expect ((expr), (value))
		106	# define INLINE static inline
		107	#else
		108	# define expect(expr,value) (expr)
		109	# define INLINE static
		110	#endif
		111
		112	#define expect_false(expr) expect ((expr) != 0, 0)
		113	#define expect_true(expr) expect ((expr) != 0, 1)
		114
		115	/////////////////////////////////////////////////////////////////////////////
		116
		117	static SV *sviv_cache[32];
53		118
54	// for "small" integers, return a readonly sv, otherwise create a new one	119	// for "small" integers, return a readonly sv, otherwise create a new one
55	static SV *newSVcacheint (int val)	120	static SV *newSVcacheint (int val)
56	{	121	{
57	static SV *cache[32];
58
59	if (val < 0 || val >= sizeof (cache))	122	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
60	return newSViv (val);	123	return newSViv (val);
61		124
62	if (!cache [val])	125	if (expect_false (!sviv_cache [val]))
63	{	126	{
64	cache [val] = newSVuv (val);	127	sviv_cache [val] = newSVuv (val);
65	SvREADONLY_on (cache [val]);	128	SvREADONLY_on (sviv_cache [val]);
66	}	129	}
67		130
68	return SvREFCNT_inc_NN (cache [val]);	131	return SvREFCNT_inc_NN (sviv_cache [val]);
69	}	132	}
70		133
71	/////////////////////////////////////////////////////////////////////////////	134	/////////////////////////////////////////////////////////////////////////////
72		135
		136	static HV *profile_stash;
		137
		138	static profile_type *
		139	SvPROFILE (SV *profile)
		140	{
		141	if (!SvOK (profile))
		142	return default_profile;
		143
		144	if (!SvROK (profile))
		145	croak ("invalid profile");
		146
		147	profile = SvRV (profile);
		148
		149	if (SvSTASH (profile) != profile_stash)
		150	croak ("invalid profile object");
		151
		152	return (void *)profile;
		153	}
		154
		155	static int
		156	profile_lookup (profile_type *profile, int klass, int tag)
		157	{
		158	SV *sv = (SV *)profile;
		159	U32 idx = (tag << 2) + klass;
		160
		161	if (expect_false (idx >= SvCUR (sv)))
		162	return BER_TYPE_BYTES;
		163
		164	return SvPVX (sv)[idx];
		165	}
		166
		167	static void
		168	profile_set (profile_type *profile, int klass, int tag, int type)
		169	{
		170	SV *sv = (SV *)profile;
		171	U32 idx = (tag << 2) + klass;
		172	STRLEN oldlen = SvCUR (sv);
		173	STRLEN newlen = idx + 2;
		174
		175	if (idx >= oldlen)
		176	{
		177	sv_grow (sv, newlen);
		178	memset (SvPVX (sv) + oldlen, BER_TYPE_BYTES, newlen - oldlen);
		179	SvCUR_set (sv, newlen);
		180	}
		181
		182	SvPVX (sv)[idx] = type;
		183	}
		184
		185	static SV *
		186	profile_new (void)
		187	{
		188	SV *sv = newSVpvn ("", 0);
		189
		190	static const struct {
		191	int klass;
		192	int tag;
		193	int type;
		194	} *celem, default_map[] = {
		195	{ ASN_UNIVERSAL, ASN_BOOLEAN , BER_TYPE_BOOL },
		196	{ ASN_UNIVERSAL, ASN_INTEGER , BER_TYPE_INT },
		197	{ ASN_UNIVERSAL, ASN_NULL , BER_TYPE_NULL },
		198	{ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, BER_TYPE_OID },
		199	{ ASN_UNIVERSAL, ASN_RELATIVE_OID , BER_TYPE_RELOID },
		200	{ ASN_UNIVERSAL, ASN_REAL , BER_TYPE_REAL },
		201	{ ASN_UNIVERSAL, ASN_ENUMERATED , BER_TYPE_INT },
		202	{ ASN_UNIVERSAL, ASN_UTF8_STRING , BER_TYPE_UTF8 },
		203	{ ASN_UNIVERSAL, ASN_BMP_STRING , BER_TYPE_UCS2 },
		204	{ ASN_UNIVERSAL, ASN_UNIVERSAL_STRING , BER_TYPE_UCS4 },
		205	};
		206
		207	for (celem = default_map + sizeof (default_map) / sizeof (default_map [0]); celem-- > default_map; )
		208	profile_set ((profile_type *)sv, celem->klass, celem->tag, celem->type);
		209
		210	return sv_bless (newRV_noinc (sv), profile_stash);
		211	}
		212
		213	/////////////////////////////////////////////////////////////////////////////
		214	// decoder
		215
73	static void	216	static void
74	error (const char *errmsg)	217	error (const char *errmsg)
75	{	218	{
76	croak ("%s at offset 0x%04x", errmsg, cur - buf);	219	croak ("%s at offset 0x%04x", errmsg, cur - buf);
77	}	220	}
78		221
79	static int	222	static void
80	need (int count)	223	want (UV count)
81	{	224	{
82	if (count < 0 || (int)rem < count)	225	if (expect_false ((uintptr_t)(end - cur) < count))
83	{
84	error ("unexpected end of message buffer");	226	error ("unexpected end of message buffer");
85	return 0;
86	}
87
88	return 1;
89	}	227	}
90		228
		229	// get_* functions fetch something from the buffer
		230	// decode_* functions use get_* fun ctions to decode ber values
		231
		232	// get n octets
91	static U8 *	233	static U8 *
92	getn (int count, const U8 *errres)	234	get_n (UV count)
93	{	235	{
94	if (!need (count))	236	want (count);
95	return (U8 *)errres;
96
97	U8 *res = cur;	237	U8 *res = cur;
98
99	cur += count;	238	cur += count;
100	rem -= count;
101
102	return res;	239	return res;
103	}	240	}
104		241
		242	// get single octet
105	static U8	243	static U8
106	get8 (void)	244	get_u8 (void)
107	{	245	{
108	if (rem <= 0)	246	if (cur == end)
109	{
110	error ("unexpected end of message buffer");	247	error ("unexpected end of message buffer");
111	return 0;
112	}
113		248
114	rem--;
115	return *cur++;	249	return *cur++;
116	}	250	}
117		251
		252	// get ber-encoded integer (i.e. pack "w")
118	static U32	253	static UV
119	getb (void)	254	get_w (void)
120	{	255	{
121	U32 res = 0;	256	UV res = 0;
		257	U8 c = get_u8 ();
		258
		259	if (expect_false (c == 0x80))
		260	error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)");
122		261
123	for (;;)	262	for (;;)
124	{	263	{
125	U8 c = get8 ();
126	res = (res << 7) | (c & 0x7f);	264	res = (res << 7) | (c & 0x7f);
127		265
128	if (!(c & 0x80))	266	if (!(c & 0x80))
129	return res;	267	return res;
130	}
131	}
132		268
		269	c = get_u8 ();
		270	}
		271	}
		272
133	static U32	273	static UV
134	process_length (void)	274	get_length (void)
135	{	275	{
136	U32 res = get8 ();	276	UV res = get_u8 ();
137		277
138	if (res & 0x80)	278	if (res & 0x80)
139	{	279	{
140	int cnt = res & 0x7f;	280	int cnt = res & 0x7f;
141	res = 0;	281	res = 0;
142		282
143	switch (cnt)	283	switch (cnt)
144	{	284	{
145	case 0:	285	case 0:
146	error ("indefinite ASN.1 lengths not supported");	286	error ("indefinite ASN.1 lengths not supported");
147	return 0;	287
		288	case 0x7f:
		289	error ("ASN.1 reserved value in length (X.690 8.1.3.5)");
148		290
149	default:	291	default:
150	error ("ASN.1 length too long");	292	error ("ASN.1 length too long (only up to 2**64 octets supported)");
151	return 0;
152		293
		294	case 8: res = (res << 8) | get_u8 ();
		295	case 7: res = (res << 8) | get_u8 ();
		296	case 6: res = (res << 8) | get_u8 ();
		297	case 5: res = (res << 8) | get_u8 ();
153	case 4: res = (res << 8) | get8 ();	298	case 4: res = (res << 8) | get_u8 ();
154	case 3: res = (res << 8) | get8 ();	299	case 3: res = (res << 8) | get_u8 ();
155	case 2: res = (res << 8) | get8 ();	300	case 2: res = (res << 8) | get_u8 ();
156	case 1: res = (res << 8) | get8 ();	301	case 1: res = (res << 8) | get_u8 ();
157	}	302	}
158	}	303	}
159		304
160	return res;	305	return res;
161	}	306	}
162		307
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 *	308	static SV *
194	process_integer32_sv (void)	309	decode_int (void)
195	{	310	{
196	return newSViv ((I32)process_integer32 ());	311	UV len = get_length ();
		312
		313	if (!len)
		314	error ("invalid integer length equal to zero (X.690 8.3.1)");
		315
		316	U8 *data = get_n (len);
		317
		318	if (expect_false (len > 1))
		319	{
		320	U16 mask = (data [0] << 8) | data [1] & 0xff80;
		321
		322	if (expect_false (mask == 0xff80 || mask == 0x0000))
		323	error ("illegal padding in integer (X.690 8.3.2)");
		324	}
		325
		326	int negative = data [0] & 0x80;
		327
		328	UV val = negative ? -1 : 0; // copy signbit to all bits
		329
		330	do
		331	val = (val << 8) | *data++;
		332	while (--len);
		333
		334	// the cast to IV relies on implementation-defined behaviour (two's complement cast)
		335	// but that's ok, as perl relies on it as well.
		336	return negative ? newSViv ((IV)val) : newSVuv (val);
197	}	337	}
198		338
199	static SV *	339	static SV *
200	process_unsigned32_sv (void)	340	decode_data (void)
201	{	341	{
202	return newSVuv ((U32)process_integer32 ());	342	UV len = get_length ();
		343	return newSVpvn ((char *)get_n (len), len);
203	}	344	}
204		345
205	#if IVSIZE >= 8	346	// 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 *	347	static char *
267	write_uv (char *buf, U32 u)	348	write_uv (char *buf, UV u)
268	{	349	{
269	// the one-digit case is absolutely predominant, so this pays off (hopefully)	350	// the one-digit case is absolutely predominant, so this pays off (hopefully)
270	if (u < 10)	351	if (expect_true (u < 10))
271	*buf++ = u + '0';	352	*buf++ = u + '0';
272	else	353	else
273	{	354	{
		355	// this *could* be done much faster using branchless fixed-point arithmetics
274	char *beg = buf;	356	char *beg = buf;
275		357
276	do	358	do
277	{	359	{
278	*buf++ = u % 10 + '0';	360	*buf++ = u % 10 + '0';
279	u /= 10;	361	u /= 10;
280	}	362	}
281	while (u);	363	while (u);
282		364
283	// reverse digits	365	// reverse digits
284	for (char *ptr = buf; --ptr != beg; ++beg)	366	char *ptr = buf;
		367	while (--ptr > beg)
285	{	368	{
286	char c = *ptr;	369	char c = *ptr;
287	*ptr = *beg;	370	*ptr = *beg;
288	*beg = c;	371	*beg = c;
		372	++beg;
289	}	373	}
290	}	374	}
291		375
292	return buf;	376	return buf;
293	}	377	}
294		378
295	static SV *	379	static SV *
296	process_object_identifier_sv (void)	380	decode_oid (int relative)
297	{	381	{
298	U32 length = process_length ();	382	UV len = get_length ();
299		383
300	if (length <= 0)	384	if (len <= 0)
301	{	385	{
302	error ("OBJECT IDENTIFIER length equal to zero");	386	error ("OBJECT IDENTIFIER length equal to zero");
303	return &PL_sv_undef;	387	return &PL_sv_undef;
304	}	388	}
305		389
306	U8 *end = cur + length;	390	U8 *end = cur + len;
307	U32 w = getb ();	391	UV w = get_w ();
308		392
309	static char oid[MAX_OID_STRLEN]; // must be static	393	static char oid[MAX_OID_STRLEN]; // static, becaueds too large for stack
310	char *app = oid;	394	char *app = oid;
311		395
		396	if (relative)
		397	app = write_uv (app, w);
		398	else if (w < 2 * 40)
		399	{
312	app = write_uv (app, (U8)w / 40);	400	app = write_uv (app, (U8)w / 40);
313	*app++ = '.';	401	*app++ = '.';
314	app = write_uv (app, (U8)w % 40);	402	app = write_uv (app, (U8)w % 40);
		403	}
		404	else
		405	{
		406	app = write_uv (app, 2);
		407	*app++ = '.';
		408	app = write_uv (app, w - 2 * 40);
		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 (int chrsize)
329	{	428	{
		429	SV *res = NEWSV (0, 0);
		430
		431	UV len = get_length ();
		432
		433	if (len & (chrsize - 1))
		434	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		435
		436	while (len)
		437	{
		438	U8 b1 = get_u8 ();
		439	U8 b2 = get_u8 ();
		440	U32 chr = (b1 << 8) | b2;
		441
		442	if (chrsize == 4)
		443	{
		444	U8 b3 = get_u8 ();
		445	U8 b4 = get_u8 ();
		446	chr = (chr << 16) | (b3 << 8) | b4;
		447	}
		448
		449	U8 uchr [UTF8_MAXBYTES];
		450	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		451
		452	sv_catpvn (res, (const char *)uchr, uclen);
		453	len -= chrsize;
		454	}
		455
		456	SvUTF8_on (res);
		457
		458	return res;
		459	}
		460
		461	static SV *
		462	decode_ber (void)
		463	{
330	int identifier = get8 ();	464	int identifier = get_u8 ();
331		465
332	SV *res;	466	SV *res;
333		467
334	int constructed = identifier & ASN_CONSTRUCTED;	468	int constructed = identifier & ASN_CONSTRUCTED;
335	int klass = identifier & ASN_CLASS_MASK;	469	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
336	int tag = identifier & ASN_TAG_MASK;	470	int tag = identifier & ASN_TAG_MASK;
337		471
338	if (tag == ASN_TAG_BER)	472	if (tag == ASN_TAG_BER)
339	tag = getb ();	473	tag = get_w ();
340
341	if (tag == ASN_TAG_BER)
342	tag = getb ();
343		474
344	if (constructed)	475	if (constructed)
345	{	476	{
346	U32 len = process_length ();	477	UV len = get_length ();
347	U32 seqend = (cur - buf) + len;	478	UV seqend = (cur - buf) + len;
348	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	479	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
349		480
350	while (cur < buf + seqend)	481	while (cur < buf + seqend)
351	av_push (av, ber_decode ());	482	av_push (av, decode_ber ());
352		483
353	if (cur > buf + seqend)	484	if (cur > buf + seqend)
354	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	485	croak ("constructed type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
355		486
356	res = newRV_inc ((SV *)av);	487	res = newRV_inc ((SV *)av);
357	}	488	}
358	else	489	else
359	switch (identifier)	490	switch (profile_lookup (cur_profile, klass, tag))
360	{	491	{
361	case ASN_NULL:	492	case BER_TYPE_NULL:
		493	{
		494	UV len = get_length ();
		495
		496	if (len)
		497	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		498
362	res = &PL_sv_undef;	499	res = &PL_sv_undef;
		500	}
363	break;	501	break;
364		502
365	case ASN_OBJECT_IDENTIFIER:	503	case BER_TYPE_BOOL:
366	res = process_object_identifier_sv ();	504	{
367	break;	505	UV len = get_length ();
368		506
369	case ASN_INTEGER32:	507	if (len != 1)
370	res = process_integer32_sv ();	508	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
371	break;
372		509
373	case ASN_APPLICATION | ASN_UNSIGNED32:	510	res = newSVcacheint (!!get_u8 ());
374	case ASN_APPLICATION | ASN_COUNTER32:	511	}
375	case ASN_APPLICATION | ASN_TIMETICKS:
376	res = process_unsigned32_sv ();
377	break;	512	break;
378		513
379	#if 0 // handled by default case	514	case BER_TYPE_OID:
380	case ASN_OCTET_STRING:	515	res = decode_oid (0);
381	case ASN_APPLICATION | ASN_IPADDRESS:
382	case ASN_APPLICATION | ASN_OPAQUE:
383	res = process_octet_string_sv ();
384	break;	516	break;
385	#endif
386		517
387	case ASN_APPLICATION | ASN_COUNTER64:	518	case BER_TYPE_RELOID:
388	res = process_integer64_sv ();	519	res = decode_oid (1);
389	break;	520	break;
390		521
		522	case BER_TYPE_INT:
		523	res = decode_int ();
		524	break;
		525
		526	case BER_TYPE_UTF8:
		527	res = decode_data ();
		528	SvUTF8_on (res);
		529	break;
		530
		531	case BER_TYPE_BYTES:
		532	res = decode_data ();
		533	break;
		534
		535	case BER_TYPE_IPADDRESS:
		536	{
		537	UV len = get_length ();
		538
		539	if (len != 4)
		540	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		541
		542	U8 c1 = get_u8 ();
		543	U8 c2 = get_u8 ();
		544	U8 c3 = get_u8 ();
		545	U8 c4 = get_u8 ();
		546
		547	res = newSVpvf ("%d.%d.%d.%d", c1, c2, c3, c4);
		548	}
		549	break;
		550
		551	case BER_TYPE_UCS2:
		552	res = decode_ucs (2);
		553	break;
		554
		555	case BER_TYPE_UCS4:
		556	res = decode_ucs (4);
		557	break;
		558
		559	case BER_TYPE_REAL:
		560	case BER_TYPE_CROAK:
391	default:	561	default:
392	res = process_octet_string_sv ();	562	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
393	break;
394	}	563	}
395		564
396	AV *av = newAV ();	565	AV *av = newAV ();
397	av_fill (av, BER_ARRAYSIZE - 1);	566	av_fill (av, BER_ARRAYSIZE - 1);
398	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	567	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
399	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	568	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
400	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	569	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
401	AvARRAY (av)[BER_DATA ] = res;	570	AvARRAY (av)[BER_DATA ] = res;
402		571
403	return newRV_noinc ((SV *)av);	572	return newRV_noinc ((SV *)av);
404	}	573	}
405		574
		575	/////////////////////////////////////////////////////////////////////////////
		576	// encoder
		577
		578	/* adds two STRLENs together, slow, and with paranoia */
		579	static STRLEN
		580	strlen_sum (STRLEN l1, STRLEN l2)
		581	{
		582	size_t sum = l1 + l2;
		583
		584	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		585	croak ("Convert::BER::XS: string size overflow");
		586
		587	return sum;
		588	}
		589
		590	static void
		591	set_buf (SV *sv)
		592	{
		593	STRLEN len;
		594	buf_sv = sv;
		595	buf = (U8 *)SvPVbyte (buf_sv, len);
		596	cur = buf;
		597	end = buf + len;
		598	}
		599
		600	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		601	static char *
		602	my_sv_grow (SV *sv, size_t len1, size_t len2)
		603	{
		604	len1 = strlen_sum (len1, len2);
		605	len1 = strlen_sum (len1, len1 >> 1);
		606
		607	if (len1 > 4096 - 24)
		608	len1 = (len1 | 4095) - 24;
		609
		610	return SvGROW (sv, len1);
		611	}
		612
		613	static void
		614	need (STRLEN len)
		615	{
		616	if (expect_false ((uintptr_t)(end - cur) < len))
		617	{
		618	STRLEN pos = cur - buf;
		619	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		620	cur = buf + pos;
		621	end = buf + SvLEN (buf_sv) - 1;
		622	}
		623	}
		624
		625	static void
		626	put_u8 (int val)
		627	{
		628	need (1);
		629	*cur++ = val;
		630	}
		631
		632	static void
		633	put_w_nocheck (UV val)
		634	{
		635	#if UVSIZE > 4
		636	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		637	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		638	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		639	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		640	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		641	#endif
		642	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		643	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		644	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		645	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		646	*cur = val & 0x7f; cur += 1;
		647	}
		648
		649	static void
		650	put_w (UV val)
		651	{
		652	need (5); // we only handle up to 5 bytes
		653
		654	put_w_nocheck (val);
		655	}
		656
		657	static U8 *
		658	put_length_at (UV val, U8 *cur)
		659	{
		660	if (val < 0x7fU)
		661	*cur++ = val;
		662	else
		663	{
		664	U8 *lenb = cur++;
		665
		666	#if UVSIZE > 4
		667	*cur = val >> 56; cur += *cur > 0;
		668	*cur = val >> 48; cur += *cur > 0;
		669	*cur = val >> 40; cur += *cur > 0;
		670	*cur = val >> 32; cur += *cur > 0;
		671	#endif
		672	*cur = val >> 24; cur += *cur > 0;
		673	*cur = val >> 16; cur += *cur > 0;
		674	*cur = val >> 8; cur += *cur > 0;
		675	*cur = val ; cur += 1;
		676
		677	*lenb = 0x80 + cur - lenb - 1;
		678	}
		679
		680	return cur;
		681	}
		682
		683	static void
		684	put_length (UV val)
		685	{
		686	need (5 + val);
		687	cur = put_length_at (val, cur);
		688	}
		689
		690	// return how many bytes the encoded length requires
		691	static int length_length (UV val)
		692	{
		693	return val < 0x7fU
		694	? 1
		695	: 2
		696	+ (val > 0xffU)
		697	+ (val > 0xffffU)
		698	+ (val > 0xffffffU)
		699	#if UVSIZE > 4
		700	+ (val > 0xffffffffU)
		701	+ (val > 0xffffffffffU)
		702	+ (val > 0xffffffffffffU)
		703	+ (val > 0xffffffffffffffU)
		704	#endif
		705	;
		706	}
		707
		708	static void
		709	encode_data (const char *ptr, STRLEN len)
		710	{
		711	put_length (len);
		712	memcpy (cur, ptr, len);
		713	cur += len;
		714	}
		715
		716	static void
		717	encode_uv (UV uv)
		718	{
		719	}
		720
		721	static void
		722	encode_int (SV *sv)
		723	{
		724	need (8 + 1 + 1); // 64 bit + length + extra 0
		725
		726	if (expect_false (!SvIOK (sv)))
		727	sv_2iv_flags (sv, 0);
		728
		729	U8 *lenb = cur++;
		730
		731	if (SvIOK_notUV (sv))
		732	{
		733	IV iv = SvIVX (sv);
		734
		735	if (expect_false (iv < 0))
		736	{
		737	// get two's complement bit pattern - works even on hypothetical non-2c machines
		738	UV uv = iv;
		739
		740	#if UVSIZE > 4
		741	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		742	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		743	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		744	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		745	#endif
		746	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		747	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		748	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		749	*cur = uv ; cur += 1;
		750
		751	*lenb = cur - lenb - 1;
		752
		753	return;
		754	}
		755	}
		756
		757	UV uv = SvUV (sv);
		758
		759	// prepend an extra 0 if the high bit is 1
		760	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		761
		762	#if UVSIZE > 4
		763	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		764	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		765	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		766	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		767	#endif
		768	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		769	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		770	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		771	*cur = uv ; cur += 1;
		772
		773	*lenb = cur - lenb - 1;
		774	}
		775
		776	// we don't know the length yet, so we optimistically
		777	// assume the length will need one octet later. If that
		778	// turns out to be wrong, we memmove as needed.
		779	// mark the beginning
		780	static STRLEN
		781	len_fixup_mark (void)
		782	{
		783	return cur++ - buf;
		784	}
		785
		786	// patch up the length
		787	static void
		788	len_fixup (STRLEN mark)
		789	{
		790	STRLEN reallen = (cur - buf) - mark - 1;
		791	int lenlen = length_length (reallen);
		792
		793	if (expect_false (lenlen > 1))
		794	{
		795	// bad luck, we have to shift the bytes to make room for the length
		796	need (5);
		797	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		798	cur += lenlen - 1;
		799	}
		800
		801	put_length_at (reallen, buf + mark);
		802	}
		803
		804	static char *
		805	read_uv (char *str, UV *uv)
		806	{
		807	UV r = 0;
		808
		809	while (*str >= '0')
		810	r = r * 10 + *str++ - '0';
		811
		812	*uv = r;
		813
		814	str += !!*str; // advance over any non-zero byte
		815
		816	return str;
		817	}
		818
		819	static void
		820	encode_oid (SV *oid, int relative)
		821	{
		822	STRLEN len;
		823	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		824
		825	// we need at most as many octets as the string form
		826	need (len + 1);
		827	STRLEN mark = len_fixup_mark ();
		828
		829	UV w1, w2;
		830
		831	if (!relative)
		832	{
		833	ptr = read_uv (ptr, &w1);
		834	ptr = read_uv (ptr, &w2);
		835
		836	put_w_nocheck (w1 * 40 + w2);
		837	}
		838
		839	while (*ptr)
		840	{
		841	ptr = read_uv (ptr, &w1);
		842	put_w_nocheck (w1);
		843	}
		844
		845	len_fixup (mark);
		846	}
		847
		848	// check whether an SV is a BER tuple and returns its AV *
		849	static AV *
		850	ber_tuple (SV *tuple)
		851	{
		852	SV *rv;
		853
		854	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		855	croak ("BER tuple must be array-reference");
		856
		857	if (expect_false (SvRMAGICAL (rv)))
		858	croak ("BER tuple must not be tied");
		859
		860	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		861	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		862
		863	return (AV *)rv;
		864	}
		865
		866	static void
		867	encode_ucs (SV *data, int chrsize)
		868	{
		869	STRLEN uchars = sv_len_utf8 (data);
		870	STRLEN len;;
		871	char *ptr = SvPVutf8 (data, len);
		872
		873	put_length (uchars * chrsize);
		874
		875	while (uchars--)
		876	{
		877	STRLEN uclen;
		878	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		879
		880	ptr += uclen;
		881	len -= uclen;
		882
		883	if (chrsize == 4)
		884	{
		885	*cur++ = uchr >> 24;
		886	*cur++ = uchr >> 16;
		887	}
		888
		889	*cur++ = uchr >> 8;
		890	*cur++ = uchr;
		891	}
		892	}
		893	static void
		894	encode_ber (SV *tuple)
		895	{
		896	AV *av = ber_tuple (tuple);
		897
		898	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		899	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		900	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		901	SV *data = AvARRAY (av)[BER_DATA];
		902
		903	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		904
		905	if (expect_false (tag >= ASN_TAG_BER))
		906	{
		907	put_u8 (identifier | ASN_TAG_BER);
		908	put_w (tag);
		909	}
		910	else
		911	put_u8 (identifier | tag);
		912
		913	if (constructed)
		914	{
		915	// we optimistically assume that only one length byte is needed
		916	// and adjust later
		917	need (1);
		918	STRLEN mark = len_fixup_mark ();
		919
		920	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		921	croak ("BER constructed data must be array-reference");
		922
		923	AV *av = (AV *)SvRV (data);
		924	int fill = AvFILL (av);
		925
		926	if (expect_false (SvRMAGICAL (av)))
		927	croak ("BER constructed data must not be tied");
		928
		929	int i;
		930	for (i = 0; i <= fill; ++i)
		931	encode_ber (AvARRAY (av)[i]);
		932
		933	len_fixup (mark);
		934	}
		935	else
		936	switch (profile_lookup (cur_profile, klass, tag))
		937	{
		938	case BER_TYPE_NULL:
		939	put_length (0);
		940	break;
		941
		942	case BER_TYPE_BOOL:
		943	put_length (1);
		944	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		945	break;
		946
		947	case BER_TYPE_OID:
		948	encode_oid (data, 0);
		949	break;
		950
		951	case BER_TYPE_RELOID:
		952	encode_oid (data, 1);
		953	break;
		954
		955	case BER_TYPE_INT:
		956	encode_int (data);
		957	break;
		958
		959	case BER_TYPE_BYTES:
		960	{
		961	STRLEN len;
		962	const char *ptr = SvPVbyte (data, len);
		963	encode_data (ptr, len);
		964	}
		965	break;
		966
		967	case BER_TYPE_UTF8:
		968	{
		969	STRLEN len;
		970	const char *ptr = SvPVutf8 (data, len);
		971	encode_data (ptr, len);
		972	}
		973	break;
		974
		975	case BER_TYPE_IPADDRESS:
		976	{
		977	U8 ip[4];
		978	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		979	encode_data ((const char *)ip, sizeof (ip));
		980	}
		981	break;
		982
		983	case BER_TYPE_UCS2:
		984	encode_ucs (data, 2);
		985	break;
		986
		987	case BER_TYPE_UCS4:
		988	encode_ucs (data, 4);
		989	break;
		990
		991	case BER_TYPE_REAL:
		992	case BER_TYPE_CROAK:
		993	default:
		994	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		995	}
		996
		997	}
		998
		999	/////////////////////////////////////////////////////////////////////////////
		1000
406	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1001	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
407		1002
408	PROTOTYPES: ENABLE	1003	PROTOTYPES: ENABLE
409		1004
410	BOOT:	1005	BOOT:
411	{	1006	{
412	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1007	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1008
		1009	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
413		1010
414	static const struct {	1011	static const struct {
415	const char *name;	1012	const char *name;
416	IV iv;	1013	IV iv;
417	} *civ, const_iv[] = {	1014	} *civ, const_iv[] = {
418	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1015	#define const_iv(name) { # name, name },
419	{ "ASN_INTEGER32", ASN_INTEGER32 },	1016	const_iv (ASN_BOOLEAN)
420	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1017	const_iv (ASN_INTEGER)
421	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1018	const_iv (ASN_BIT_STRING)
422	{ "ASN_NULL", ASN_NULL },	1019	const_iv (ASN_OCTET_STRING)
423	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1020	const_iv (ASN_NULL)
424	{ "ASN_TAG_BER", ASN_TAG_BER },	1021	const_iv (ASN_OBJECT_IDENTIFIER)
425	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1022	const_iv (ASN_OBJECT_DESCRIPTOR)
426	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1023	const_iv (ASN_OID)
427	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1024	const_iv (ASN_EXTERNAL)
428	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1025	const_iv (ASN_REAL)
429	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1026	const_iv (ASN_SEQUENCE)
430	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1027	const_iv (ASN_ENUMERATED)
431	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1028	const_iv (ASN_EMBEDDED_PDV)
432	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1029	const_iv (ASN_UTF8_STRING)
433	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1030	const_iv (ASN_RELATIVE_OID)
434	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1031	const_iv (ASN_SET)
435	{ "ASN_COUNTER32", ASN_COUNTER32 },	1032	const_iv (ASN_NUMERIC_STRING)
436	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1033	const_iv (ASN_PRINTABLE_STRING)
437	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1034	const_iv (ASN_TELETEX_STRING)
438	{ "ASN_OPAQUE", ASN_OPAQUE },	1035	const_iv (ASN_T61_STRING)
439	{ "ASN_COUNTER64", ASN_COUNTER64 },	1036	const_iv (ASN_VIDEOTEX_STRING)
		1037	const_iv (ASN_IA5_STRING)
		1038	const_iv (ASN_ASCII_STRING)
		1039	const_iv (ASN_UTC_TIME)
		1040	const_iv (ASN_GENERALIZED_TIME)
		1041	const_iv (ASN_GRAPHIC_STRING)
		1042	const_iv (ASN_VISIBLE_STRING)
		1043	const_iv (ASN_ISO646_STRING)
		1044	const_iv (ASN_GENERAL_STRING)
		1045	const_iv (ASN_UNIVERSAL_STRING)
		1046	const_iv (ASN_CHARACTER_STRING)
		1047	const_iv (ASN_BMP_STRING)
440		1048
441	{ "BER_CLASS" , BER_CLASS },	1049	const_iv (ASN_UNIVERSAL)
442	{ "BER_TAG" , BER_TAG },	1050	const_iv (ASN_APPLICATION)
443	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1051	const_iv (ASN_CONTEXT)
444	{ "BER_DATA" , BER_DATA },	1052	const_iv (ASN_PRIVATE)
		1053
		1054	const_iv (BER_CLASS)
		1055	const_iv (BER_TAG)
		1056	const_iv (BER_FLAGS)
		1057	const_iv (BER_DATA)
		1058
		1059	const_iv (BER_TYPE_BYTES)
		1060	const_iv (BER_TYPE_UTF8)
		1061	const_iv (BER_TYPE_UCS2)
		1062	const_iv (BER_TYPE_UCS4)
		1063	const_iv (BER_TYPE_INT)
		1064	const_iv (BER_TYPE_OID)
		1065	const_iv (BER_TYPE_RELOID)
		1066	const_iv (BER_TYPE_NULL)
		1067	const_iv (BER_TYPE_BOOL)
		1068	const_iv (BER_TYPE_REAL)
		1069	const_iv (BER_TYPE_IPADDRESS)
		1070	const_iv (BER_TYPE_CROAK)
		1071
		1072	const_iv (SNMP_IPADDRESS)
		1073	const_iv (SNMP_COUNTER32)
		1074	const_iv (SNMP_UNSIGNED32)
		1075	const_iv (SNMP_TIMETICKS)
		1076	const_iv (SNMP_OPAQUE)
		1077	const_iv (SNMP_COUNTER64)
445	};	1078	};
446		1079
447	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1080	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));	1081	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
449	}	1082	}
450		1083
451	SV *	1084	SV *
452	ber_decode (SV *ber)	1085	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
453	CODE:	1086	CODE:
454	{	1087	{
		1088	cur_profile = SvPROFILE (profile);
		1089	STRLEN len;
455	buf = SvPVbyte (ber, len);	1090	buf = (U8 *)SvPVbyte (ber, len);
456	cur = buf;	1091	cur = buf;
457	rem = len;	1092	end = buf + len;
458		1093
459	RETVAL = ber_decode ();	1094	RETVAL = decode_ber ();
460	}	1095	}
461	OUTPUT: RETVAL	1096	OUTPUT: RETVAL
462		1097
463	void	1098	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)	1099	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:	1100	PPCODE:
467	{	1101	{
468	if (!SvOK (tuple))	1102	if (!SvOK (tuple))
469	XSRETURN_NO;	1103	XSRETURN_NO;
470		1104
471	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1105	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
472	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1106	croak ("ber_is: tuple must be BER tuple (array-ref)");
473		1107
474	AV *av = (AV *)SvRV (tuple);	1108	AV *av = (AV *)SvRV (tuple);
475		1109
476	XPUSHs (	1110	XPUSHs (
477	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1111	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
478	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1112	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
479	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1113	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
480	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1114	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
481	? &PL_sv_yes : &PL_sv_no);	1115	? &PL_sv_yes : &PL_sv_undef);
482	}	1116	}
483		1117
484	void	1118	void
485	ber_is_seq (SV *tuple)	1119	ber_is_seq (SV *tuple)
486	PROTOTYPE: $
487	PPCODE:	1120	PPCODE:
488	{	1121	{
489	if (!SvOK (tuple))	1122	if (!SvOK (tuple))
490	XSRETURN_UNDEF;	1123	XSRETURN_UNDEF;
491		1124
492	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1125	AV *av = ber_tuple (tuple);
493	croak ("ber_seq: tuple must be ber tuple (array-ref)");
494
495	AV *av = (AV *)SvRV (tuple);
496		1126
497	XPUSHs (	1127	XPUSHs (
498	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1128	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
499	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1129	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
500	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1130	&& SvIV (AvARRAY (av)[BER_FLAGS])
501	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1131	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
502	}	1132	}
503		1133
504	void	1134	void
505	ber_is_i32 (SV *tuple, IV value)	1135	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
506	PROTOTYPE: $$
507	PPCODE:	1136	PPCODE:
508	{	1137	{
509	if (!SvOK (tuple))	1138	if (!SvOK (tuple))
510	XSRETURN_NO;	1139	XSRETURN_NO;
511		1140
512	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1141	AV *av = ber_tuple (tuple);
513	croak ("ber_seq: tuple must be ber tuple (array-ref)");
514		1142
515	AV *av = (AV *)SvRV (tuple);	1143	UV data = SvUV (AvARRAY (av)[BER_DATA]);
516		1144
517	XPUSHs (	1145	XPUSHs (
518	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1146	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
519	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1147	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
520	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1148	&& !SvIV (AvARRAY (av)[BER_FLAGS])
521	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1149	&& (!SvOK (value) || data == SvUV (value))
522	? &PL_sv_yes : &PL_sv_no);	1150	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1151	: &PL_sv_undef);
523	}	1152	}
524		1153
525	void	1154	void
526	ber_is_oid (SV *tuple, SV *oid)	1155	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
527	PROTOTYPE: $$
528	PPCODE:	1156	PPCODE:
529	{	1157	{
530	if (!SvOK (tuple))	1158	if (!SvOK (tuple))
531	XSRETURN_NO;	1159	XSRETURN_NO;
532		1160
533	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1161	AV *av = ber_tuple (tuple);
534	croak ("ber_seq: tuple must be ber tuple (array-ref)");
535
536	AV *av = (AV *)SvRV (tuple);
537		1162
538	XPUSHs (	1163	XPUSHs (
539	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1164	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
540	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1165	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
541	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1166	&& !SvIV (AvARRAY (av)[BER_FLAGS])
542	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1167	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
543	? &PL_sv_yes : &PL_sv_no);	1168	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
544	}	1169	}
545		1170
		1171	#############################################################################
		1172
		1173	void
		1174	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1175	PPCODE:
		1176	{
		1177	cur_profile = SvPROFILE (profile);
		1178	buf_sv = sv_2mortal (NEWSV (0, 256));
		1179	SvPOK_only (buf_sv);
		1180	set_buf (buf_sv);
		1181
		1182	encode_ber (tuple);
		1183
		1184	SvCUR_set (buf_sv, cur - buf);
		1185	XPUSHs (buf_sv);
		1186	}
		1187
		1188	SV *
		1189	ber_int (SV *sv)
		1190	CODE:
		1191	{
		1192	AV *av = newAV ();
		1193	av_fill (av, BER_ARRAYSIZE - 1);
		1194	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1195	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1196	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1197	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1198	RETVAL = newRV_noinc ((SV *)av);
		1199	}
		1200	OUTPUT: RETVAL
		1201
		1202	# TODO: not arrayref, but elements?
		1203	SV *
		1204	ber_seq (SV *arrayref)
		1205	CODE:
		1206	{
		1207	AV *av = newAV ();
		1208	av_fill (av, BER_ARRAYSIZE - 1);
		1209	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1210	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1211	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1212	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1213	RETVAL = newRV_noinc ((SV *)av);
		1214	}
		1215	OUTPUT: RETVAL
		1216
		1217	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1218
		1219	SV *
		1220	new (SV *klass)
		1221	CODE:
		1222	RETVAL = profile_new ();
		1223	OUTPUT: RETVAL
		1224
		1225	void
		1226	set (SV *profile, int klass, int tag, int type)
		1227	CODE:
		1228	profile_set (SvPROFILE (profile), klass, tag, type);
		1229
		1230	IV
		1231	get (SV *profile, int klass, int tag)
		1232	CODE:
		1233	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1234	OUTPUT: RETVAL
		1235
		1236	void
		1237	_set_default (SV *profile)
		1238	CODE:
		1239	default_profile = SvPROFILE (profile);
		1240
		1241

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