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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 1.23 by root, Sun Apr 21 01:51:12 2019 UTC

1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	// C99 required	5	// C99 required!
		6	// this is not just for comments, but also for
		7	// integer constant semantics,
		8	// sscanf format modifiers and more.
6		9
7	enum {	10	enum {
8	// ASN_TAG	11	// ASN_TAG
9	ASN_BOOLEAN = 0x01,	12	ASN_BOOLEAN = 0x01,
10	ASN_INTEGER32 = 0x02,	13	ASN_INTEGER = 0x02,
11	ASN_BIT_STRING = 0x03,	14	ASN_BIT_STRING = 0x03,
12	ASN_OCTET_STRING = 0x04,	15	ASN_OCTET_STRING = 0x04,
13	ASN_NULL = 0x05,	16	ASN_NULL = 0x05,
14	ASN_OBJECT_IDENTIFIER = 0x06,	17	ASN_OBJECT_IDENTIFIER = 0x06,
		18	ASN_OID = 0x06,
		19	ASN_OBJECT_DESCRIPTOR = 0x07,
		20	ASN_EXTERNAL = 0x08,
		21	ASN_REAL = 0x09,
		22	ASN_ENUMERATED = 0x0a,
		23	ASN_EMBEDDED_PDV = 0x0b,
		24	ASN_UTF8_STRING = 0x0c,
		25	ASN_RELATIVE_OID = 0x0d,
15	ASN_SEQUENCE = 0x10,	26	ASN_SEQUENCE = 0x10,
		27	ASN_SET = 0x11,
		28	ASN_NUMERIC_STRING = 0x12,
		29	ASN_PRINTABLE_STRING = 0x13,
		30	ASN_TELETEX_STRING = 0x14,
		31	ASN_T61_STRING = 0x14,
		32	ASN_VIDEOTEX_STRING = 0x15,
		33	ASN_IA5_STRING = 0x16,
		34	ASN_ASCII_STRING = 0x16,
		35	ASN_UTC_TIME = 0x17,
		36	ASN_GENERALIZED_TIME = 0x18,
		37	ASN_GRAPHIC_STRING = 0x19,
		38	ASN_VISIBLE_STRING = 0x1a,
		39	ASN_ISO646_STRING = 0x1a,
		40	ASN_GENERAL_STRING = 0x1b,
		41	ASN_UNIVERSAL_STRING = 0x1c,
		42	ASN_CHARACTER_STRING = 0x1d,
		43	ASN_BMP_STRING = 0x1e,
16		44
17	ASN_TAG_BER = 0x1f,	45	ASN_TAG_BER = 0x1f,
18	ASN_TAG_MASK = 0x1f,	46	ASN_TAG_MASK = 0x1f,
19		47
20	// primitive/constructed	48	// primitive/constructed
21	ASN_CONSTRUCTED = 0x20,	49	ASN_CONSTRUCTED = 0x20,
22		50
23	// ASN_CLASS	51	// ASN_CLASS
24	ASN_UNIVERSAL = 0x00,	52	ASN_UNIVERSAL = 0x00,
25	ASN_APPLICATION = 0x40,	53	ASN_APPLICATION = 0x01,
26	ASN_CONTEXT = 0x80,	54	ASN_CONTEXT = 0x02,
27	ASN_PRIVATE = 0xc0,	55	ASN_PRIVATE = 0x03,
28		56
29	ASN_CLASS_MASK = 0xc0,	57	ASN_CLASS_MASK = 0xc0,
30	ASN_CLASS_SHIFT = 6,	58	ASN_CLASS_SHIFT = 6,
31		59
32	// ASN_APPLICATION	60	// ASN_APPLICATION SNMP
33	ASN_IPADDRESS = 0x00,	61	SNMP_IPADDRESS = 0x00,
34	ASN_COUNTER32 = 0x01,	62	SNMP_COUNTER32 = 0x01,
		63	SNMP_GAUGE32 = 0x02,
35	ASN_UNSIGNED32 = 0x02,	64	SNMP_UNSIGNED32 = 0x02,
36	ASN_TIMETICKS = 0x03,	65	SNMP_TIMETICKS = 0x03,
37	ASN_OPAQUE = 0x04,	66	SNMP_OPAQUE = 0x04,
38	ASN_COUNTER64 = 0x06,	67	SNMP_COUNTER64 = 0x06,
39	};	68	};
40		69
41	enum {	70	enum {
		71	BER_TYPE_BYTES,
		72	BER_TYPE_UTF8,
		73	BER_TYPE_UCS2,
		74	BER_TYPE_UCS4,
		75	BER_TYPE_INT,
		76	BER_TYPE_OID,
		77	BER_TYPE_RELOID,
		78	BER_TYPE_NULL,
		79	BER_TYPE_BOOL,
		80	BER_TYPE_REAL,
		81	BER_TYPE_IPADDRESS,
		82	BER_TYPE_CROAK,
		83	};
		84
		85	enum {
42	BER_CLASS = 0,	86	BER_CLASS = 0,
43	BER_TAG = 1,	87	BER_TAG = 1,
44	BER_CONSTRUCTED = 2,	88	BER_FLAGS = 2,
45	BER_DATA = 3,	89	BER_DATA = 3,
46	BER_ARRAYSIZE	90	BER_ARRAYSIZE
47	};	91	};
48		92
49	#define MAX_OID_STRLEN 4096	93	#define MAX_OID_STRLEN 4096
50		94
51	static U8 *buf, *cur;	95	typedef void profile_type;
52	static STRLEN len, rem;	96
		97	static profile_type *cur_profile, *default_profile;
		98	static SV *buf_sv; // encoding buffer
		99	static U8 *buf, *cur, *end; // buffer start, current, end
		100
		101	#if PERL_VERSION < 18
		102	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
		103	#endif
		104
		105	#if __GNUC__ >= 3
		106	# define expect(expr,value) __builtin_expect ((expr), (value))
		107	# define INLINE static inline
		108	#else
		109	# define expect(expr,value) (expr)
		110	# define INLINE static
		111	#endif
		112
		113	#define expect_false(expr) expect ((expr) != 0, 0)
		114	#define expect_true(expr) expect ((expr) != 0, 1)
		115
		116	/////////////////////////////////////////////////////////////////////////////
		117
		118	static SV *sviv_cache[32];
53		119
54	// for "small" integers, return a readonly sv, otherwise create a new one	120	// for "small" integers, return a readonly sv, otherwise create a new one
55	static SV *newSVcacheint (int val)	121	static SV *newSVcacheint (int val)
56	{	122	{
57	static SV *cache[32];
58
59	if (val < 0 || val >= sizeof (cache))	123	if (expect_false (val < 0 || val >= sizeof (sviv_cache)))
60	return newSViv (val);	124	return newSViv (val);
61		125
62	if (!cache [val])	126	if (expect_false (!sviv_cache [val]))
63	{	127	{
64	cache [val] = newSVuv (val);	128	sviv_cache [val] = newSVuv (val);
65	SvREADONLY_on (cache [val]);	129	SvREADONLY_on (sviv_cache [val]);
66	}	130	}
67		131
68	return SvREFCNT_inc_NN (cache [val]);	132	return SvREFCNT_inc_NN (sviv_cache [val]);
69	}	133	}
70		134
71	/////////////////////////////////////////////////////////////////////////////	135	/////////////////////////////////////////////////////////////////////////////
72		136
		137	static HV *profile_stash;
		138
		139	static profile_type *
		140	SvPROFILE (SV *profile)
		141	{
		142	if (!SvOK (profile))
		143	return default_profile;
		144
		145	if (!SvROK (profile))
		146	croak ("invalid profile");
		147
		148	profile = SvRV (profile);
		149
		150	if (SvSTASH (profile) != profile_stash)
		151	croak ("invalid profile object");
		152
		153	return (void *)profile;
		154	}
		155
		156	static int
		157	profile_lookup (profile_type *profile, int klass, int tag)
		158	{
		159	SV *sv = (SV *)profile;
		160	U32 idx = (tag << 2) + klass;
		161
		162	if (expect_false (idx >= SvCUR (sv)))
		163	return BER_TYPE_BYTES;
		164
		165	return SvPVX (sv)[idx];
		166	}
		167
		168	static void
		169	profile_set (profile_type *profile, int klass, int tag, int type)
		170	{
		171	SV *sv = (SV *)profile;
		172	U32 idx = (tag << 2) + klass;
		173	STRLEN oldlen = SvCUR (sv);
		174	STRLEN newlen = idx + 2;
		175
		176	if (idx >= oldlen)
		177	{
		178	sv_grow (sv, newlen);
		179	memset (SvPVX (sv) + oldlen, BER_TYPE_BYTES, newlen - oldlen);
		180	SvCUR_set (sv, newlen);
		181	}
		182
		183	SvPVX (sv)[idx] = type;
		184	}
		185
		186	static SV *
		187	profile_new (void)
		188	{
		189	SV *sv = newSVpvn ("", 0);
		190
		191	static const struct {
		192	int klass;
		193	int tag;
		194	int type;
		195	} *celem, default_map[] = {
		196	{ ASN_UNIVERSAL, ASN_BOOLEAN , BER_TYPE_BOOL },
		197	{ ASN_UNIVERSAL, ASN_INTEGER , BER_TYPE_INT },
		198	{ ASN_UNIVERSAL, ASN_NULL , BER_TYPE_NULL },
		199	{ ASN_UNIVERSAL, ASN_OBJECT_IDENTIFIER, BER_TYPE_OID },
		200	{ ASN_UNIVERSAL, ASN_RELATIVE_OID , BER_TYPE_RELOID },
		201	{ ASN_UNIVERSAL, ASN_REAL , BER_TYPE_REAL },
		202	{ ASN_UNIVERSAL, ASN_ENUMERATED , BER_TYPE_INT },
		203	{ ASN_UNIVERSAL, ASN_UTF8_STRING , BER_TYPE_UTF8 },
		204	{ ASN_UNIVERSAL, ASN_BMP_STRING , BER_TYPE_UCS2 },
		205	{ ASN_UNIVERSAL, ASN_UNIVERSAL_STRING , BER_TYPE_UCS4 },
		206	};
		207
		208	for (celem = default_map + sizeof (default_map) / sizeof (default_map [0]); celem-- > default_map; )
		209	profile_set ((profile_type *)sv, celem->klass, celem->tag, celem->type);
		210
		211	return sv_bless (newRV_noinc (sv), profile_stash);
		212	}
		213
		214	/////////////////////////////////////////////////////////////////////////////
		215	// decoder
		216
73	static void	217	static void
74	error (const char *errmsg)	218	error (const char *errmsg)
75	{	219	{
76	croak ("%s at offset 0x%04x", errmsg, cur - buf);	220	croak ("%s at offset 0x%04x", errmsg, cur - buf);
77	}	221	}
78		222
79	static int	223	static void
80	need (int count)	224	want (UV count)
81	{	225	{
82	if (count < 0 || (int)rem < count)	226	if (expect_false ((uintptr_t)(end - cur) < count))
83	{
84	error ("unexpected end of message buffer");	227	error ("unexpected end of message buffer");
85	return 0;
86	}
87
88	return 1;
89	}	228	}
90		229
		230	// get_* functions fetch something from the buffer
		231	// decode_* functions use get_* fun ctions to decode ber values
		232
		233	// get n octets
91	static U8 *	234	static U8 *
92	getn (int count, const U8 *errres)	235	get_n (UV count)
93	{	236	{
94	if (!need (count))	237	want (count);
95	return (U8 *)errres;
96
97	U8 *res = cur;	238	U8 *res = cur;
98
99	cur += count;	239	cur += count;
100	rem -= count;
101
102	return res;	240	return res;
103	}	241	}
104		242
		243	// get single octet
105	static U8	244	static U8
106	get8 (void)	245	get_u8 (void)
107	{	246	{
108	if (rem <= 0)	247	if (cur == end)
109	{
110	error ("unexpected end of message buffer");	248	error ("unexpected end of message buffer");
111	return 0;
112	}
113		249
114	rem--;
115	return *cur++;	250	return *cur++;
116	}	251	}
117		252
		253	// get ber-encoded integer (i.e. pack "w")
118	static U32	254	static UV
119	getb (void)	255	get_w (void)
120	{	256	{
121	U32 res = 0;	257	UV res = 0;
		258	U8 c = get_u8 ();
		259
		260	if (expect_false (c == 0x80))
		261	error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)");
122		262
123	for (;;)	263	for (;;)
124	{	264	{
125	U8 c = get8 ();	265	if (expect_false (res >> UVSIZE * 8 - 7))
		266	error ("BER variable integer overflow");
		267
126	res = (res << 7) | (c & 0x7f);	268	res = (res << 7) | (c & 0x7f);
127		269
128	if (!(c & 0x80))	270	if (!(c & 0x80))
129	return res;	271	return res;
130	}
131	}
132		272
		273	c = get_u8 ();
		274	}
		275	}
		276
133	static U32	277	static UV
134	process_length (void)	278	get_length (void)
135	{	279	{
136	U32 res = get8 ();	280	UV res = get_u8 ();
137		281
138	if (res & 0x80)	282	if (res & 0x80)
139	{	283	{
140	int cnt = res & 0x7f;	284	int cnt = res & 0x7f;
141	res = 0;	285	res = 0;
142		286
143	switch (cnt)	287	switch (cnt)
144	{	288	{
145	case 0:	289	case 0:
146	error ("indefinite ASN.1 lengths not supported");	290	error ("indefinite ASN.1 lengths not supported");
147	return 0;	291
		292	case 0x7f:
		293	error ("ASN.1 reserved value in length (X.690 8.1.3.5)");
148		294
149	default:	295	default:
150	error ("ASN.1 length too long");	296	error ("ASN.1 length too long (only up to 2**64 octets supported)");
151	return 0;
152		297
		298	case 8: res = (res << 8) | get_u8 ();
		299	case 7: res = (res << 8) | get_u8 ();
		300	case 6: res = (res << 8) | get_u8 ();
		301	case 5: res = (res << 8) | get_u8 ();
153	case 4: res = (res << 8) | get8 ();	302	case 4: res = (res << 8) | get_u8 ();
154	case 3: res = (res << 8) | get8 ();	303	case 3: res = (res << 8) | get_u8 ();
155	case 2: res = (res << 8) | get8 ();	304	case 2: res = (res << 8) | get_u8 ();
156	case 1: res = (res << 8) | get8 ();	305	case 1: res = (res << 8) | get_u8 ();
157	}	306	}
158	}	307	}
159		308
160	return res;	309	return res;
161	}	310	}
162		311
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 *	312	static SV *
194	process_integer32_sv (void)	313	decode_int (void)
195	{	314	{
196	return newSViv ((I32)process_integer32 ());	315	UV len = get_length ();
		316
		317	if (!len)
		318	error ("invalid integer length equal to zero (X.690 8.3.1)");
		319
		320	U8 *data = get_n (len);
		321
		322	if (expect_false (len > 1))
		323	{
		324	U16 mask = (data [0] << 8) | data [1] & 0xff80;
		325
		326	if (expect_false (mask == 0xff80 || mask == 0x0000))
		327	error ("illegal padding in integer (X.690 8.3.2)");
		328	}
		329
		330	int negative = data [0] & 0x80;
		331
		332	UV val = negative ? -1 : 0; // copy signbit to all bits
		333
		334	if (len > UVSIZE + (!negative && !*data))
		335	//printf ("len %d > %d + (!%d && !%d) = %d\n", len, UVSIZE, negative, *data, UVSIZE + (!negative && !*data));//D
		336	error ("INTEGER overflow");
		337
		338	do
		339	val = (val << 8) | *data++;
		340	while (--len);
		341
		342	// the cast to IV relies on implementation-defined behaviour (two's complement cast)
		343	// but that's ok, as perl relies on it as well.
		344	return negative ? newSViv ((IV)val) : newSVuv (val);
197	}	345	}
198		346
199	static SV *	347	static SV *
200	process_unsigned32_sv (void)	348	decode_data (void)
201	{	349	{
202	return newSVuv ((U32)process_integer32 ());	350	UV len = get_length ();
		351	return newSVpvn ((char *)get_n (len), len);
203	}	352	}
204		353
205	#if IVSIZE >= 8	354	// 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 *	355	static char *
267	write_uv (char *buf, U32 u)	356	write_uv (char *buf, UV u)
268	{	357	{
269	// the one-digit case is absolutely predominant, so this pays off (hopefully)	358	// the one-digit case is absolutely predominant, so this pays off (hopefully)
270	if (u < 10)	359	if (expect_true (u < 10))
271	*buf++ = u + '0';	360	*buf++ = u + '0';
272	else	361	else
273	{	362	{
		363	// this *could* be done much faster using branchless fixed-point arithmetics
274	char *beg = buf;	364	char *beg = buf;
275		365
276	do	366	do
277	{	367	{
278	*buf++ = u % 10 + '0';	368	*buf++ = u % 10 + '0';
279	u /= 10;	369	u /= 10;
280	}	370	}
281	while (u);	371	while (u);
282		372
283	// reverse digits	373	// reverse digits
284	for (char *ptr = buf; --ptr != beg; ++beg)	374	char *ptr = buf;
		375	while (--ptr > beg)
285	{	376	{
286	char c = *ptr;	377	char c = *ptr;
287	*ptr = *beg;	378	*ptr = *beg;
288	*beg = c;	379	*beg = c;
		380	++beg;
289	}	381	}
290	}	382	}
291		383
292	return buf;	384	return buf;
293	}	385	}
294		386
295	static SV *	387	static SV *
296	process_object_identifier_sv (void)	388	decode_oid (int relative)
297	{	389	{
298	U32 length = process_length ();	390	UV len = get_length ();
299		391
300	if (length <= 0)	392	if (len <= 0)
301	{	393	{
302	error ("OBJECT IDENTIFIER length equal to zero");	394	error ("OBJECT IDENTIFIER length equal to zero");
303	return &PL_sv_undef;	395	return &PL_sv_undef;
304	}	396	}
305		397
306	U8 *end = cur + length;	398	U8 *end = cur + len;
307	U32 w = getb ();	399	UV w = get_w ();
308		400
309	static char oid[MAX_OID_STRLEN]; // must be static	401	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
310	char *app = oid;	402	char *app = oid;
311		403
		404	if (relative)
		405	app = write_uv (app, w);
		406	else if (w < 2 * 40)
		407	{
312	app = write_uv (app, (U8)w / 40);	408	app = write_uv (app, (U8)w / 40);
313	*app++ = '.';	409	*app++ = '.';
314	app = write_uv (app, (U8)w % 40);	410	app = write_uv (app, (U8)w % 40);
		411	}
		412	else
		413	{
		414	app = write_uv (app, 2);
		415	*app++ = '.';
		416	app = write_uv (app, w - 2 * 40);
		417	}
315		418
		419	while (cur < end)
		420	{
316	// we assume an oid component is never > 64 bytes	421	// we assume an oid component is never > 64 digits
317	while (cur < end && oid + sizeof (oid) - app > 64)	422	if (oid + sizeof (oid) - app < 64)
318	{	423	croak ("BER_TYPE_OID to long to decode");
		424
319	w = getb ();	425	w = get_w ();
320	*app++ = '.';	426	*app++ = '.';
321	app = write_uv (app, w);	427	app = write_uv (app, w);
322	}	428	}
323		429
324	return newSVpvn (oid, app - oid);	430	return newSVpvn (oid, app - oid);
325	}	431	}
326		432
		433	// TODO: this is unacceptably slow
327	static SV *	434	static SV *
328	ber_decode ()	435	decode_ucs (int chrsize)
329	{	436	{
		437	SV *res = NEWSV (0, 0);
		438
		439	UV len = get_length ();
		440
		441	if (len & (chrsize - 1))
		442	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		443
		444	while (len)
		445	{
		446	U8 b1 = get_u8 ();
		447	U8 b2 = get_u8 ();
		448	U32 chr = (b1 << 8) | b2;
		449
		450	if (chrsize == 4)
		451	{
		452	U8 b3 = get_u8 ();
		453	U8 b4 = get_u8 ();
		454	chr = (chr << 16) | (b3 << 8) | b4;
		455	}
		456
		457	U8 uchr [UTF8_MAXBYTES];
		458	int uclen = uvuni_to_utf8 (uchr, chr) - uchr;
		459
		460	sv_catpvn (res, (const char *)uchr, uclen);
		461	len -= chrsize;
		462	}
		463
		464	SvUTF8_on (res);
		465
		466	return res;
		467	}
		468
		469	static SV *
		470	decode_ber (void)
		471	{
330	int identifier = get8 ();	472	int identifier = get_u8 ();
331		473
332	SV *res;	474	SV *res;
333		475
334	int constructed = identifier & ASN_CONSTRUCTED;	476	int constructed = identifier & ASN_CONSTRUCTED;
335	int klass = identifier & ASN_CLASS_MASK;	477	int klass = (identifier & ASN_CLASS_MASK) >> ASN_CLASS_SHIFT;
336	int tag = identifier & ASN_TAG_MASK;	478	int tag = identifier & ASN_TAG_MASK;
337		479
338	if (tag == ASN_TAG_BER)	480	if (tag == ASN_TAG_BER)
339	tag = getb ();	481	tag = get_w ();
340
341	if (tag == ASN_TAG_BER)
342	tag = getb ();
343		482
344	if (constructed)	483	if (constructed)
345	{	484	{
346	U32 len = process_length ();	485	UV len = get_length ();
347	U32 seqend = (cur - buf) + len;	486	UV seqend = (cur - buf) + len;
348	AV *av = (AV *)sv_2mortal ((SV *)newAV ());	487	AV *av = (AV *)sv_2mortal ((SV *)newAV ());
349		488
350	while (cur < buf + seqend)	489	while (cur < buf + seqend)
351	av_push (av, ber_decode ());	490	av_push (av, decode_ber ());
352		491
353	if (cur > buf + seqend)	492	if (cur > buf + seqend)
354	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);	493	croak ("constructed type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
355		494
356	res = newRV_inc ((SV *)av);	495	res = newRV_inc ((SV *)av);
357	}	496	}
358	else	497	else
359	switch (identifier)	498	switch (profile_lookup (cur_profile, klass, tag))
360	{	499	{
361	case ASN_NULL:	500	case BER_TYPE_NULL:
		501	{
		502	UV len = get_length ();
		503
		504	if (len)
		505	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
		506
362	res = &PL_sv_undef;	507	res = &PL_sv_undef;
		508	}
363	break;	509	break;
364		510
365	case ASN_OBJECT_IDENTIFIER:	511	case BER_TYPE_BOOL:
366	res = process_object_identifier_sv ();	512	{
367	break;	513	UV len = get_length ();
368		514
369	case ASN_INTEGER32:	515	if (len != 1)
370	res = process_integer32_sv ();	516	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
371	break;
372		517
373	case ASN_APPLICATION | ASN_UNSIGNED32:	518	res = newSVcacheint (!!get_u8 ());
374	case ASN_APPLICATION | ASN_COUNTER32:	519	}
375	case ASN_APPLICATION | ASN_TIMETICKS:
376	res = process_unsigned32_sv ();
377	break;	520	break;
378		521
379	#if 0 // handled by default case	522	case BER_TYPE_OID:
380	case ASN_OCTET_STRING:	523	res = decode_oid (0);
381	case ASN_APPLICATION | ASN_IPADDRESS:
382	case ASN_APPLICATION | ASN_OPAQUE:
383	res = process_octet_string_sv ();
384	break;	524	break;
385	#endif
386		525
387	case ASN_APPLICATION | ASN_COUNTER64:	526	case BER_TYPE_RELOID:
388	res = process_integer64_sv ();	527	res = decode_oid (1);
389	break;	528	break;
390		529
		530	case BER_TYPE_INT:
		531	res = decode_int ();
		532	break;
		533
		534	case BER_TYPE_UTF8:
		535	res = decode_data ();
		536	SvUTF8_on (res);
		537	break;
		538
		539	case BER_TYPE_BYTES:
		540	res = decode_data ();
		541	break;
		542
		543	case BER_TYPE_IPADDRESS:
		544	{
		545	UV len = get_length ();
		546
		547	if (len != 4)
		548	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
		549
		550	U8 c1 = get_u8 ();
		551	U8 c2 = get_u8 ();
		552	U8 c3 = get_u8 ();
		553	U8 c4 = get_u8 ();
		554
		555	res = newSVpvf ("%d.%d.%d.%d", c1, c2, c3, c4);
		556	}
		557	break;
		558
		559	case BER_TYPE_UCS2:
		560	res = decode_ucs (2);
		561	break;
		562
		563	case BER_TYPE_UCS4:
		564	res = decode_ucs (4);
		565	break;
		566
		567	case BER_TYPE_REAL:
		568	case BER_TYPE_CROAK:
391	default:	569	default:
392	res = process_octet_string_sv ();	570	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
393	break;
394	}	571	}
395		572
396	AV *av = newAV ();	573	AV *av = newAV ();
397	av_fill (av, BER_ARRAYSIZE - 1);	574	av_fill (av, BER_ARRAYSIZE - 1);
398	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);	575	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
399	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	576	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
400	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);	577	AvARRAY (av)[BER_FLAGS] = newSVcacheint (constructed ? 1 : 0);
401	AvARRAY (av)[BER_DATA ] = res;	578	AvARRAY (av)[BER_DATA ] = res;
402		579
403	return newRV_noinc ((SV *)av);	580	return newRV_noinc ((SV *)av);
404	}	581	}
405		582
		583	/////////////////////////////////////////////////////////////////////////////
		584	// encoder
		585
		586	/* adds two STRLENs together, slow, and with paranoia */
		587	static STRLEN
		588	strlen_sum (STRLEN l1, STRLEN l2)
		589	{
		590	size_t sum = l1 + l2;
		591
		592	if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum)
		593	croak ("Convert::BER::XS: string size overflow");
		594
		595	return sum;
		596	}
		597
		598	static void
		599	set_buf (SV *sv)
		600	{
		601	STRLEN len;
		602	buf_sv = sv;
		603	buf = (U8 *)SvPVbyte (buf_sv, len);
		604	cur = buf;
		605	end = buf + len;
		606	}
		607
		608	/* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */
		609	static char *
		610	my_sv_grow (SV *sv, size_t len1, size_t len2)
		611	{
		612	len1 = strlen_sum (len1, len2);
		613	len1 = strlen_sum (len1, len1 >> 1);
		614
		615	if (len1 > 4096 - 24)
		616	len1 = (len1 | 4095) - 24;
		617
		618	return SvGROW (sv, len1);
		619	}
		620
		621	static void
		622	need (STRLEN len)
		623	{
		624	if (expect_false ((uintptr_t)(end - cur) < len))
		625	{
		626	STRLEN pos = cur - buf;
		627	buf = (U8 *)my_sv_grow (buf_sv, pos, len);
		628	cur = buf + pos;
		629	end = buf + SvLEN (buf_sv) - 1;
		630	}
		631	}
		632
		633	static void
		634	put_u8 (int val)
		635	{
		636	need (1);
		637	*cur++ = val;
		638	}
		639
		640	static void
		641	put_w_nocheck (UV val)
		642	{
		643	#if UVSIZE > 4
		644	*cur = (val >> 7 * 9) | 0x80; cur += val >= ((UV)1 << (7 * 9));
		645	*cur = (val >> 7 * 8) | 0x80; cur += val >= ((UV)1 << (7 * 8));
		646	*cur = (val >> 7 * 7) | 0x80; cur += val >= ((UV)1 << (7 * 7));
		647	*cur = (val >> 7 * 6) | 0x80; cur += val >= ((UV)1 << (7 * 6));
		648	*cur = (val >> 7 * 5) | 0x80; cur += val >= ((UV)1 << (7 * 5));
		649	#endif
		650	*cur = (val >> 7 * 4) | 0x80; cur += val >= ((UV)1 << (7 * 4));
		651	*cur = (val >> 7 * 3) | 0x80; cur += val >= ((UV)1 << (7 * 3));
		652	*cur = (val >> 7 * 2) | 0x80; cur += val >= ((UV)1 << (7 * 2));
		653	*cur = (val >> 7 * 1) | 0x80; cur += val >= ((UV)1 << (7 * 1));
		654	*cur = val & 0x7f; cur += 1;
		655	}
		656
		657	static void
		658	put_w (UV val)
		659	{
		660	need (5); // we only handle up to 5 bytes
		661
		662	put_w_nocheck (val);
		663	}
		664
		665	static U8 *
		666	put_length_at (UV val, U8 *cur)
		667	{
		668	if (val < 0x7fU)
		669	*cur++ = val;
		670	else
		671	{
		672	U8 *lenb = cur++;
		673
		674	#if UVSIZE > 4
		675	*cur = val >> 56; cur += *cur > 0;
		676	*cur = val >> 48; cur += *cur > 0;
		677	*cur = val >> 40; cur += *cur > 0;
		678	*cur = val >> 32; cur += *cur > 0;
		679	#endif
		680	*cur = val >> 24; cur += *cur > 0;
		681	*cur = val >> 16; cur += *cur > 0;
		682	*cur = val >> 8; cur += *cur > 0;
		683	*cur = val ; cur += 1;
		684
		685	*lenb = 0x80 + cur - lenb - 1;
		686	}
		687
		688	return cur;
		689	}
		690
		691	static void
		692	put_length (UV val)
		693	{
		694	need (5 + val);
		695	cur = put_length_at (val, cur);
		696	}
		697
		698	// return how many bytes the encoded length requires
		699	static int length_length (UV val)
		700	{
		701	return val < 0x7fU
		702	? 1
		703	: 2
		704	+ (val > 0xffU)
		705	+ (val > 0xffffU)
		706	+ (val > 0xffffffU)
		707	#if UVSIZE > 4
		708	+ (val > 0xffffffffU)
		709	+ (val > 0xffffffffffU)
		710	+ (val > 0xffffffffffffU)
		711	+ (val > 0xffffffffffffffU)
		712	#endif
		713	;
		714	}
		715
		716	static void
		717	encode_data (const char *ptr, STRLEN len)
		718	{
		719	put_length (len);
		720	memcpy (cur, ptr, len);
		721	cur += len;
		722	}
		723
		724	static void
		725	encode_uv (UV uv)
		726	{
		727	}
		728
		729	static void
		730	encode_int (SV *sv)
		731	{
		732	need (8 + 1 + 1); // 64 bit + length + extra 0
		733
		734	if (expect_false (!SvIOK (sv)))
		735	sv_2iv_flags (sv, 0);
		736
		737	U8 *lenb = cur++;
		738
		739	if (SvIOK_notUV (sv))
		740	{
		741	IV iv = SvIVX (sv);
		742
		743	if (expect_false (iv < 0))
		744	{
		745	// get two's complement bit pattern - works even on hypothetical non-2c machines
		746	UV uv = iv;
		747
		748	#if UVSIZE > 4
		749	*cur = uv >> 56; cur += !!(~uv & 0xff80000000000000U);
		750	*cur = uv >> 48; cur += !!(~uv & 0xffff800000000000U);
		751	*cur = uv >> 40; cur += !!(~uv & 0xffffff8000000000U);
		752	*cur = uv >> 32; cur += !!(~uv & 0xffffffff80000000U);
		753	#endif
		754	*cur = uv >> 24; cur += !!(~uv & 0xffffffffff800000U);
		755	*cur = uv >> 16; cur += !!(~uv & 0xffffffffffff8000U);
		756	*cur = uv >> 8; cur += !!(~uv & 0xffffffffffffff80U);
		757	*cur = uv ; cur += 1;
		758
		759	*lenb = cur - lenb - 1;
		760
		761	return;
		762	}
		763	}
		764
		765	UV uv = SvUV (sv);
		766
		767	// prepend an extra 0 if the high bit is 1
		768	*cur = 0; cur += !!(uv & ((UV)1 << (UVSIZE * 8 - 1)));
		769
		770	#if UVSIZE > 4
		771	*cur = uv >> 56; cur += !!(uv & 0xff80000000000000U);
		772	*cur = uv >> 48; cur += !!(uv & 0xffff800000000000U);
		773	*cur = uv >> 40; cur += !!(uv & 0xffffff8000000000U);
		774	*cur = uv >> 32; cur += !!(uv & 0xffffffff80000000U);
		775	#endif
		776	*cur = uv >> 24; cur += !!(uv & 0xffffffffff800000U);
		777	*cur = uv >> 16; cur += !!(uv & 0xffffffffffff8000U);
		778	*cur = uv >> 8; cur += !!(uv & 0xffffffffffffff80U);
		779	*cur = uv ; cur += 1;
		780
		781	*lenb = cur - lenb - 1;
		782	}
		783
		784	// we don't know the length yet, so we optimistically
		785	// assume the length will need one octet later. If that
		786	// turns out to be wrong, we memmove as needed.
		787	// mark the beginning
		788	static STRLEN
		789	len_fixup_mark (void)
		790	{
		791	return cur++ - buf;
		792	}
		793
		794	// patch up the length
		795	static void
		796	len_fixup (STRLEN mark)
		797	{
		798	STRLEN reallen = (cur - buf) - mark - 1;
		799	int lenlen = length_length (reallen);
		800
		801	if (expect_false (lenlen > 1))
		802	{
		803	// bad luck, we have to shift the bytes to make room for the length
		804	need (5);
		805	memmove (buf + mark + lenlen, buf + mark + 1, reallen);
		806	cur += lenlen - 1;
		807	}
		808
		809	put_length_at (reallen, buf + mark);
		810	}
		811
		812	static char *
		813	read_uv (char *str, UV *uv)
		814	{
		815	UV r = 0;
		816
		817	while (*str >= '0')
		818	r = r * 10 + *str++ - '0';
		819
		820	*uv = r;
		821
		822	str += !!*str; // advance over any non-zero byte
		823
		824	return str;
		825	}
		826
		827	static void
		828	encode_oid (SV *oid, int relative)
		829	{
		830	STRLEN len;
		831	char *ptr = SvPV (oid, len); // utf8 vs. bytes does not matter
		832
		833	// we need at most as many octets as the string form
		834	need (len + 1);
		835	STRLEN mark = len_fixup_mark ();
		836
		837	UV w1, w2;
		838
		839	if (!relative)
		840	{
		841	ptr = read_uv (ptr, &w1);
		842	ptr = read_uv (ptr, &w2);
		843
		844	put_w_nocheck (w1 * 40 + w2);
		845	}
		846
		847	while (*ptr)
		848	{
		849	ptr = read_uv (ptr, &w1);
		850	put_w_nocheck (w1);
		851	}
		852
		853	len_fixup (mark);
		854	}
		855
		856	// check whether an SV is a BER tuple and returns its AV *
		857	static AV *
		858	ber_tuple (SV *tuple)
		859	{
		860	SV *rv;
		861
		862	if (expect_false (!SvROK (tuple) || SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		863	croak ("BER tuple must be array-reference");
		864
		865	if (expect_false (SvRMAGICAL (rv)))
		866	croak ("BER tuple must not be tied");
		867
		868	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		869	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		870
		871	return (AV *)rv;
		872	}
		873
		874	static void
		875	encode_ucs (SV *data, int chrsize)
		876	{
		877	STRLEN uchars = sv_len_utf8 (data);
		878	STRLEN len;;
		879	char *ptr = SvPVutf8 (data, len);
		880
		881	put_length (uchars * chrsize);
		882
		883	while (uchars--)
		884	{
		885	STRLEN uclen;
		886	UV uchr = utf8_to_uvchr_buf ((U8 *)ptr, (U8 *)ptr + len, &uclen);
		887
		888	ptr += uclen;
		889	len -= uclen;
		890
		891	if (chrsize == 4)
		892	{
		893	*cur++ = uchr >> 24;
		894	*cur++ = uchr >> 16;
		895	}
		896
		897	*cur++ = uchr >> 8;
		898	*cur++ = uchr;
		899	}
		900	}
		901	static void
		902	encode_ber (SV *tuple)
		903	{
		904	AV *av = ber_tuple (tuple);
		905
		906	int klass = SvIV (AvARRAY (av)[BER_CLASS]);
		907	int tag = SvIV (AvARRAY (av)[BER_TAG]);
		908	int constructed = SvIV (AvARRAY (av)[BER_FLAGS]) & 1 ? ASN_CONSTRUCTED : 0;
		909	SV *data = AvARRAY (av)[BER_DATA];
		910
		911	int identifier = (klass << ASN_CLASS_SHIFT) | constructed;
		912
		913	if (expect_false (tag >= ASN_TAG_BER))
		914	{
		915	put_u8 (identifier | ASN_TAG_BER);
		916	put_w (tag);
		917	}
		918	else
		919	put_u8 (identifier | tag);
		920
		921	if (constructed)
		922	{
		923	// we optimistically assume that only one length byte is needed
		924	// and adjust later
		925	need (1);
		926	STRLEN mark = len_fixup_mark ();
		927
		928	if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
		929	croak ("BER constructed data must be array-reference");
		930
		931	AV *av = (AV *)SvRV (data);
		932	int fill = AvFILL (av);
		933
		934	if (expect_false (SvRMAGICAL (av)))
		935	croak ("BER constructed data must not be tied");
		936
		937	int i;
		938	for (i = 0; i <= fill; ++i)
		939	encode_ber (AvARRAY (av)[i]);
		940
		941	len_fixup (mark);
		942	}
		943	else
		944	switch (profile_lookup (cur_profile, klass, tag))
		945	{
		946	case BER_TYPE_NULL:
		947	put_length (0);
		948	break;
		949
		950	case BER_TYPE_BOOL:
		951	put_length (1);
		952	*cur++ = SvTRUE (data) ? 0xff : 0x00; // 0xff = DER/CER
		953	break;
		954
		955	case BER_TYPE_OID:
		956	encode_oid (data, 0);
		957	break;
		958
		959	case BER_TYPE_RELOID:
		960	encode_oid (data, 1);
		961	break;
		962
		963	case BER_TYPE_INT:
		964	encode_int (data);
		965	break;
		966
		967	case BER_TYPE_BYTES:
		968	{
		969	STRLEN len;
		970	const char *ptr = SvPVbyte (data, len);
		971	encode_data (ptr, len);
		972	}
		973	break;
		974
		975	case BER_TYPE_UTF8:
		976	{
		977	STRLEN len;
		978	const char *ptr = SvPVutf8 (data, len);
		979	encode_data (ptr, len);
		980	}
		981	break;
		982
		983	case BER_TYPE_IPADDRESS:
		984	{
		985	U8 ip[4];
		986	sscanf (SvPV_nolen (data), "%hhu.%hhu.%hhu.%hhu", ip + 0, ip + 1, ip + 2, ip + 3);
		987	encode_data ((const char *)ip, sizeof (ip));
		988	}
		989	break;
		990
		991	case BER_TYPE_UCS2:
		992	encode_ucs (data, 2);
		993	break;
		994
		995	case BER_TYPE_UCS4:
		996	encode_ucs (data, 4);
		997	break;
		998
		999	case BER_TYPE_REAL:
		1000	case BER_TYPE_CROAK:
		1001	default:
		1002	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
		1003	}
		1004
		1005	}
		1006
		1007	/////////////////////////////////////////////////////////////////////////////
		1008
406	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS	1009	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
407		1010
408	PROTOTYPES: ENABLE	1011	PROTOTYPES: ENABLE
409		1012
410	BOOT:	1013	BOOT:
411	{	1014	{
412	HV *stash = gv_stashpv ("Convert::BER::XS", 1);	1015	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
		1016
		1017	profile_stash = gv_stashpv ("Convert::BER::XS::Profile", 1);
413		1018
414	static const struct {	1019	static const struct {
415	const char *name;	1020	const char *name;
416	IV iv;	1021	IV iv;
417	} *civ, const_iv[] = {	1022	} *civ, const_iv[] = {
418	{ "ASN_BOOLEAN", ASN_BOOLEAN },	1023	#define const_iv(name) { # name, name },
419	{ "ASN_INTEGER32", ASN_INTEGER32 },	1024	const_iv (ASN_BOOLEAN)
420	{ "ASN_BIT_STRING", ASN_BIT_STRING },	1025	const_iv (ASN_INTEGER)
421	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },	1026	const_iv (ASN_BIT_STRING)
422	{ "ASN_NULL", ASN_NULL },	1027	const_iv (ASN_OCTET_STRING)
423	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },	1028	const_iv (ASN_NULL)
424	{ "ASN_TAG_BER", ASN_TAG_BER },	1029	const_iv (ASN_OBJECT_IDENTIFIER)
425	{ "ASN_TAG_MASK", ASN_TAG_MASK },	1030	const_iv (ASN_OBJECT_DESCRIPTOR)
426	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },	1031	const_iv (ASN_OID)
427	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },	1032	const_iv (ASN_EXTERNAL)
428	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },	1033	const_iv (ASN_REAL)
429	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },	1034	const_iv (ASN_SEQUENCE)
430	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },	1035	const_iv (ASN_ENUMERATED)
431	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },	1036	const_iv (ASN_EMBEDDED_PDV)
432	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },	1037	const_iv (ASN_UTF8_STRING)
433	{ "ASN_SEQUENCE", ASN_SEQUENCE },	1038	const_iv (ASN_RELATIVE_OID)
434	{ "ASN_IPADDRESS", ASN_IPADDRESS },	1039	const_iv (ASN_SET)
435	{ "ASN_COUNTER32", ASN_COUNTER32 },	1040	const_iv (ASN_NUMERIC_STRING)
436	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },	1041	const_iv (ASN_PRINTABLE_STRING)
437	{ "ASN_TIMETICKS", ASN_TIMETICKS },	1042	const_iv (ASN_TELETEX_STRING)
438	{ "ASN_OPAQUE", ASN_OPAQUE },	1043	const_iv (ASN_T61_STRING)
439	{ "ASN_COUNTER64", ASN_COUNTER64 },	1044	const_iv (ASN_VIDEOTEX_STRING)
		1045	const_iv (ASN_IA5_STRING)
		1046	const_iv (ASN_ASCII_STRING)
		1047	const_iv (ASN_UTC_TIME)
		1048	const_iv (ASN_GENERALIZED_TIME)
		1049	const_iv (ASN_GRAPHIC_STRING)
		1050	const_iv (ASN_VISIBLE_STRING)
		1051	const_iv (ASN_ISO646_STRING)
		1052	const_iv (ASN_GENERAL_STRING)
		1053	const_iv (ASN_UNIVERSAL_STRING)
		1054	const_iv (ASN_CHARACTER_STRING)
		1055	const_iv (ASN_BMP_STRING)
440		1056
441	{ "BER_CLASS" , BER_CLASS },	1057	const_iv (ASN_UNIVERSAL)
442	{ "BER_TAG" , BER_TAG },	1058	const_iv (ASN_APPLICATION)
443	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },	1059	const_iv (ASN_CONTEXT)
444	{ "BER_DATA" , BER_DATA },	1060	const_iv (ASN_PRIVATE)
		1061
		1062	const_iv (BER_CLASS)
		1063	const_iv (BER_TAG)
		1064	const_iv (BER_FLAGS)
		1065	const_iv (BER_DATA)
		1066
		1067	const_iv (BER_TYPE_BYTES)
		1068	const_iv (BER_TYPE_UTF8)
		1069	const_iv (BER_TYPE_UCS2)
		1070	const_iv (BER_TYPE_UCS4)
		1071	const_iv (BER_TYPE_INT)
		1072	const_iv (BER_TYPE_OID)
		1073	const_iv (BER_TYPE_RELOID)
		1074	const_iv (BER_TYPE_NULL)
		1075	const_iv (BER_TYPE_BOOL)
		1076	const_iv (BER_TYPE_REAL)
		1077	const_iv (BER_TYPE_IPADDRESS)
		1078	const_iv (BER_TYPE_CROAK)
		1079
		1080	const_iv (SNMP_IPADDRESS)
		1081	const_iv (SNMP_COUNTER32)
		1082	const_iv (SNMP_GAUGE32)
		1083	const_iv (SNMP_UNSIGNED32)
		1084	const_iv (SNMP_TIMETICKS)
		1085	const_iv (SNMP_OPAQUE)
		1086	const_iv (SNMP_COUNTER64)
445	};	1087	};
446		1088
447	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1089	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
448	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));	1090	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
449	}	1091	}
450		1092
451	SV *	1093	void
452	ber_decode (SV *ber)	1094	ber_decode (SV *ber, SV *profile = &PL_sv_undef)
		1095	ALIAS:
		1096	ber_decode_prefix = 1
453	CODE:	1097	PPCODE:
454	{	1098	{
		1099	cur_profile = SvPROFILE (profile);
		1100	STRLEN len;
455	buf = SvPVbyte (ber, len);	1101	buf = (U8 *)SvPVbyte (ber, len);
456	cur = buf;	1102	cur = buf;
457	rem = len;	1103	end = buf + len;
458		1104
459	RETVAL = ber_decode ();	1105	SV *tuple = decode_ber ();
		1106
		1107	EXTEND (SP, 2);
		1108	PUSHs (sv_2mortal (tuple));
		1109
		1110	if (ix)
		1111	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1112	else if (cur != end)
		1113	error ("trailing garbage after BER data");
460	}	1114	}
461	OUTPUT: RETVAL
462		1115
463	void	1116	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)	1117	ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *flags = &PL_sv_undef, SV *data = &PL_sv_undef)
465	PROTOTYPE: $;$$$
466	PPCODE:	1118	PPCODE:
467	{	1119	{
468	if (!SvOK (tuple))	1120	if (!SvOK (tuple))
469	XSRETURN_NO;	1121	XSRETURN_NO;
470		1122
471	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1123	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
472	croak ("ber_seq: tuple must be ber tuple (array-ref)");	1124	croak ("ber_is: tuple must be BER tuple (array-ref)");
473		1125
474	AV *av = (AV *)SvRV (tuple);	1126	AV *av = (AV *)SvRV (tuple);
475		1127
476	XPUSHs (	1128	XPUSHs (
477	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))	1129	(!SvOK (klass) || SvIV (AvARRAY (av)[BER_CLASS]) == SvIV (klass))
478	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))	1130	&& (!SvOK (tag) || SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
479	&& (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))	1131	&& (!SvOK (flags) || !SvIV (AvARRAY (av)[BER_FLAGS]) == !SvIV (flags))
480	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))	1132	&& (!SvOK (data) || sv_eq (AvARRAY (av)[BER_DATA ], data))
481	? &PL_sv_yes : &PL_sv_no);	1133	? &PL_sv_yes : &PL_sv_undef);
482	}	1134	}
483		1135
484	void	1136	void
485	ber_is_seq (SV *tuple)	1137	ber_is_seq (SV *tuple)
486	PROTOTYPE: $
487	PPCODE:	1138	PPCODE:
488	{	1139	{
489	if (!SvOK (tuple))	1140	if (!SvOK (tuple))
490	XSRETURN_UNDEF;	1141	XSRETURN_UNDEF;
491		1142
492	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1143	AV *av = ber_tuple (tuple);
493	croak ("ber_seq: tuple must be ber tuple (array-ref)");
494
495	AV *av = (AV *)SvRV (tuple);
496		1144
497	XPUSHs (	1145	XPUSHs (
498	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1146	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
499	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE	1147	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
500	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1148	&& SvIV (AvARRAY (av)[BER_FLAGS])
501	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);	1149	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
502	}	1150	}
503		1151
504	void	1152	void
505	ber_is_i32 (SV *tuple, IV value)	1153	ber_is_int (SV *tuple, SV *value = &PL_sv_undef)
506	PROTOTYPE: $$
507	PPCODE:	1154	PPCODE:
508	{	1155	{
509	if (!SvOK (tuple))	1156	if (!SvOK (tuple))
510	XSRETURN_NO;	1157	XSRETURN_NO;
511		1158
512	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1159	AV *av = ber_tuple (tuple);
513	croak ("ber_seq: tuple must be ber tuple (array-ref)");
514		1160
515	AV *av = (AV *)SvRV (tuple);	1161	UV data = SvUV (AvARRAY (av)[BER_DATA]);
516		1162
517	XPUSHs (	1163	XPUSHs (
518	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1164	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
519	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32	1165	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER
520	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1166	&& !SvIV (AvARRAY (av)[BER_FLAGS])
521	&& SvIV (AvARRAY (av)[BER_DATA ]) == value	1167	&& (!SvOK (value) || data == SvUV (value))
522	? &PL_sv_yes : &PL_sv_no);	1168	? sv_2mortal (data ? newSVsv (AvARRAY (av)[BER_DATA]) : newSVpv ("0 but true", 0))
		1169	: &PL_sv_undef);
523	}	1170	}
524		1171
525	void	1172	void
526	ber_is_oid (SV *tuple, SV *oid)	1173	ber_is_oid (SV *tuple, SV *oid = &PL_sv_undef)
527	PROTOTYPE: $$
528	PPCODE:	1174	PPCODE:
529	{	1175	{
530	if (!SvOK (tuple))	1176	if (!SvOK (tuple))
531	XSRETURN_NO;	1177	XSRETURN_NO;
532		1178
533	if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)	1179	AV *av = ber_tuple (tuple);
534	croak ("ber_seq: tuple must be ber tuple (array-ref)");
535
536	AV *av = (AV *)SvRV (tuple);
537		1180
538	XPUSHs (	1181	XPUSHs (
539	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL	1182	SvIV (AvARRAY (av)[BER_CLASS]) == ASN_UNIVERSAL
540	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER	1183	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
541	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])	1184	&& !SvIV (AvARRAY (av)[BER_FLAGS])
542	&& sv_eq (AvARRAY (av)[BER_DATA], oid)	1185	&& (!SvOK (oid) || sv_eq (AvARRAY (av)[BER_DATA], oid))
543	? &PL_sv_yes : &PL_sv_no);	1186	? newSVsv (AvARRAY (av)[BER_DATA]) : &PL_sv_undef);
544	}	1187	}
545		1188
		1189	#############################################################################
		1190
		1191	void
		1192	ber_encode (SV *tuple, SV *profile = &PL_sv_undef)
		1193	PPCODE:
		1194	{
		1195	cur_profile = SvPROFILE (profile);
		1196	buf_sv = sv_2mortal (NEWSV (0, 256));
		1197	SvPOK_only (buf_sv);
		1198	set_buf (buf_sv);
		1199
		1200	encode_ber (tuple);
		1201
		1202	SvCUR_set (buf_sv, cur - buf);
		1203	XPUSHs (buf_sv);
		1204	}
		1205
		1206	SV *
		1207	ber_int (SV *sv)
		1208	CODE:
		1209	{
		1210	AV *av = newAV ();
		1211	av_fill (av, BER_ARRAYSIZE - 1);
		1212	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1213	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_INTEGER);
		1214	AvARRAY (av)[BER_FLAGS] = newSVcacheint (0);
		1215	AvARRAY (av)[BER_DATA ] = newSVsv (sv);
		1216	RETVAL = newRV_noinc ((SV *)av);
		1217	}
		1218	OUTPUT: RETVAL
		1219
		1220	# TODO: not arrayref, but elements?
		1221	SV *
		1222	ber_seq (SV *arrayref)
		1223	CODE:
		1224	{
		1225	AV *av = newAV ();
		1226	av_fill (av, BER_ARRAYSIZE - 1);
		1227	AvARRAY (av)[BER_CLASS] = newSVcacheint (ASN_UNIVERSAL);
		1228	AvARRAY (av)[BER_TAG ] = newSVcacheint (ASN_SEQUENCE);
		1229	AvARRAY (av)[BER_FLAGS] = newSVcacheint (1);
		1230	AvARRAY (av)[BER_DATA ] = newSVsv (arrayref);
		1231	RETVAL = newRV_noinc ((SV *)av);
		1232	}
		1233	OUTPUT: RETVAL
		1234
		1235	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS::Profile
		1236
		1237	SV *
		1238	new (SV *klass)
		1239	CODE:
		1240	RETVAL = profile_new ();
		1241	OUTPUT: RETVAL
		1242
		1243	void
		1244	set (SV *profile, int klass, int tag, int type)
		1245	CODE:
		1246	profile_set (SvPROFILE (profile), klass, tag, type);
		1247
		1248	IV
		1249	get (SV *profile, int klass, int tag)
		1250	CODE:
		1251	RETVAL = profile_lookup (SvPROFILE (profile), klass, tag);
		1252	OUTPUT: RETVAL
		1253
		1254	void
		1255	_set_default (SV *profile)
		1256	CODE:
		1257	default_profile = SvPROFILE (profile);
		1258
		1259

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