Convert-BER-XS/XS.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

// C99 required

enum {
  // ASN_TAG
  ASN_BOOLEAN           = 0x01,
  ASN_INTEGER32         = 0x02,
  ASN_BIT_STRING        = 0x03,
  ASN_OCTET_STRING      = 0x04,
  ASN_NULL              = 0x05,
  ASN_OBJECT_IDENTIFIER = 0x06,
  ASN_SEQUENCE          = 0x10,

  ASN_TAG_BER           = 0x1f,
  ASN_TAG_MASK          = 0x1f,

  // primitive/constructed
  ASN_CONSTRUCTED       = 0x20,

  // ASN_CLASS
  ASN_UNIVERSAL         = 0x00,
  ASN_APPLICATION       = 0x40,
  ASN_CONTEXT           = 0x80,
  ASN_PRIVATE           = 0xc0,

  ASN_CLASS_MASK        = 0xc0,
  ASN_CLASS_SHIFT       = 6,

  // ASN_APPLICATION
  ASN_IPADDRESS         = 0x00,
  ASN_COUNTER32         = 0x01,
  ASN_UNSIGNED32        = 0x02,
  ASN_TIMETICKS         = 0x03,
  ASN_OPAQUE            = 0x04,
  ASN_COUNTER64         = 0x06,
};

enum {
  BER_CLASS       = 0,
  BER_TAG         = 1,
  BER_CONSTRUCTED = 2,
  BER_DATA        = 3,
  BER_ARRAYSIZE
};

#define MAX_OID_STRLEN 4096

static U8 *buf, *cur;
static STRLEN len, rem;

// for "small" integers, return a readonly sv, otherwise create a new one
static SV *newSVcacheint (int val)
{
  static SV *cache[32];

  if (val < 0 || val >= sizeof (cache))
    return newSViv (val);

  if (!cache [val])
    {
      cache [val] = newSVuv (val);
      SvREADONLY_on (cache [val]);
    }

  return SvREFCNT_inc_NN (cache [val]);
}

/////////////////////////////////////////////////////////////////////////////

static void
error (const char *errmsg)
{
  croak ("%s at offset 0x%04x", errmsg, cur - buf);
}

static int
need (int count)
{
  if (count < 0 || (int)rem < count)
    {
      error ("unexpected end of message buffer");
      return 0;
    }

  return 1;
}

static U8 *
getn (int count, const U8 *errres)
{
  if (!need (count))
    return (U8 *)errres;

  U8 *res = cur;

  cur += count;
  rem -= count;

  return res;
}

static U8
get8 (void)
{
  if (rem <= 0)
    {
      error ("unexpected end of message buffer");
      return 0;
    }

  rem--;
  return *cur++;
}

static U32
getb (void)
{
  U32 res = 0;

  for (;;)
    {
      U8 c = get8 ();
      res = (res << 7) | (c & 0x7f);

      if (!(c & 0x80))
        return res;
    }
}

static U32
process_length (void)
{
  U32 res = get8 ();

  if (res & 0x80)
    {
      int cnt = res & 0x7f;
      res = 0;

      switch (cnt)
        {
          case 0:
            error ("indefinite ASN.1 lengths not supported");
            return 0;

          default:
            error ("ASN.1 length too long");
            return 0;

          case 4: res = (res << 8) | get8 ();
          case 3: res = (res << 8) | get8 ();
          case 2: res = (res << 8) | get8 ();
          case 1: res = (res << 8) | get8 ();
        }
    }

  return res;
}

static U32
process_integer32 (void)
{
  U32 length = process_length ();

  if (length <= 0)
    {
      error ("INTEGER32 length equal to zero");
      return 0;
    }

  U8 *data = getn (length, 0);

  if (!data)
    return 0;

  if (length > 5 || (length > 4 && data [0]))
    {
      error ("INTEGER32 length too long");
      return 0;
    }

  U32 res = data [0] & 0x80 ? 0xffffffff : 0;

  while (length--)
    res = (res << 8) | *data++;

  return res;
}

static SV *
process_integer32_sv (void)
{
  return newSViv ((I32)process_integer32 ());
}

static SV *
process_unsigned32_sv (void)
{
  return newSVuv ((U32)process_integer32 ());
}

#if IVSIZE >= 8

static U64TYPE
process_integer64 (void)
{
  U32 length = process_length ();

  if (length <= 0)
    {
      error ("INTEGER64 length equal to zero");
      return 0;
    }

  U8 *data = getn (length, 0);

  if (!data)
    return 0;

  if (length > 9 || (length > 8 && data [0]))
    {
      error ("INTEGER64 length too long");
      return 0;
    }

  U64TYPE res = data [0] & 0x80 ? 0xffffffffffffffff : 0;

  while (length--)
    res = (res << 8) | *data++;

  return res;
}

static SV *
process_integer64_sv (void)
{
  return newSViv ((I64TYPE)process_integer64 ());
}

static SV *
process_unsigned64_sv (void)
{
  return newSVuv ((U64TYPE)process_integer64 ());
}

#endif

static SV *
process_octet_string_sv (void)
{
  U32 length = process_length ();

  U8 *data = getn (length, 0);
  if (!data)
    {
      error ("OCTET STRING too long");
      return &PL_sv_undef;
    }

  return newSVpvn (data, length);
}

static char *
write_uv (char *buf, U32 u)
{
  // the one-digit case is absolutely predominant, so this pays off (hopefully)
  if (u < 10)
    *buf++ = u + '0';
  else
    {
      char *beg = buf;

      do
        {
          *buf++ = u % 10 + '0';
          u /= 10;
        }
      while (u);

      // reverse digits
      for (char *ptr = buf; --ptr != beg; ++beg)
        {
          char c = *ptr;
          *ptr = *beg;
          *beg = c;
        }
    }

  return buf;
}

static SV *
process_object_identifier_sv (void)
{
  U32 length = process_length ();

  if (length <= 0)
    {
      error ("OBJECT IDENTIFIER length equal to zero");
      return &PL_sv_undef;
    }

  U8 *end = cur + length;
  U32 w = getb ();

  static char oid[MAX_OID_STRLEN]; // must be static
  char *app = oid;

  app = write_uv (app, (U8)w / 40);
  *app++ = '.';
  app = write_uv (app, (U8)w % 40);

  // we assume an oid component is never > 64 bytes
  while (cur < end && oid + sizeof (oid) - app > 64)
    {
      w = getb ();
      *app++ = '.';
      app = write_uv (app, w);
    }

  return newSVpvn (oid, app - oid);
}

static SV *
ber_decode ()
{
  int identifier = get8 ();

  SV *res;

  int constructed = identifier & ASN_CONSTRUCTED;
  int klass       = identifier & ASN_CLASS_MASK;
  int tag         = identifier & ASN_TAG_MASK;

  if (tag == ASN_TAG_BER)
    tag = getb ();

  if (tag == ASN_TAG_BER)
    tag = getb ();

  if (constructed)
    {
      U32 len = process_length ();
      U32 seqend = (cur - buf) + len;
      AV *av = (AV *)sv_2mortal ((SV *)newAV ());

      while (cur < buf + seqend)
        av_push (av, ber_decode ());

      if (cur > buf + seqend)
        croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);

      res = newRV_inc ((SV *)av);
    }
  else
    switch (identifier)
      {
        case ASN_NULL:
          res = &PL_sv_undef;
          break;

        case ASN_OBJECT_IDENTIFIER:
          res = process_object_identifier_sv ();
          break;

        case ASN_INTEGER32:
          res = process_integer32_sv ();
          break;

        case ASN_APPLICATION | ASN_UNSIGNED32:
        case ASN_APPLICATION | ASN_COUNTER32:
        case ASN_APPLICATION | ASN_TIMETICKS:
          res = process_unsigned32_sv ();
          break;

#if 0 // handled by default case
        case ASN_OCTET_STRING:
        case ASN_APPLICATION | ASN_IPADDRESS:
        case ASN_APPLICATION | ASN_OPAQUE:
          res = process_octet_string_sv ();
          break;
#endif

        case ASN_APPLICATION | ASN_COUNTER64:
          res = process_integer64_sv ();
          break;

        default:
          res = process_octet_string_sv ();
          break;
      }

  AV *av = newAV ();
  av_fill (av, BER_ARRAYSIZE - 1);
  AvARRAY (av)[BER_CLASS      ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);
  AvARRAY (av)[BER_TAG        ] = newSVcacheint (tag);
  AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);
  AvARRAY (av)[BER_DATA       ] = res;

  return newRV_noinc ((SV *)av);
}

MODULE = Convert::BER::XS               PACKAGE = Convert::BER::XS

PROTOTYPES: ENABLE

BOOT:
{
  HV *stash = gv_stashpv ("Convert::BER::XS", 1);

  static const struct {
    const char *name;
    IV iv;
  } *civ, const_iv[] = {
    { "ASN_BOOLEAN",           ASN_BOOLEAN           },
    { "ASN_INTEGER32",         ASN_INTEGER32         },
    { "ASN_BIT_STRING",        ASN_BIT_STRING        },
    { "ASN_OCTET_STRING",      ASN_OCTET_STRING      },
    { "ASN_NULL",              ASN_NULL              },
    { "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },
    { "ASN_TAG_BER",           ASN_TAG_BER           },
    { "ASN_TAG_MASK",          ASN_TAG_MASK          },
    { "ASN_CONSTRUCTED",       ASN_CONSTRUCTED       },
    { "ASN_UNIVERSAL",         ASN_UNIVERSAL   >> ASN_CLASS_SHIFT },
    { "ASN_APPLICATION",       ASN_APPLICATION >> ASN_CLASS_SHIFT },
    { "ASN_CONTEXT",           ASN_CONTEXT     >> ASN_CLASS_SHIFT },
    { "ASN_PRIVATE",           ASN_PRIVATE     >> ASN_CLASS_SHIFT },
    { "ASN_CLASS_MASK",        ASN_CLASS_MASK        },
    { "ASN_CLASS_SHIFT",       ASN_CLASS_SHIFT       },
    { "ASN_SEQUENCE",          ASN_SEQUENCE          },
    { "ASN_IPADDRESS",         ASN_IPADDRESS         },
    { "ASN_COUNTER32",         ASN_COUNTER32         },
    { "ASN_UNSIGNED32",        ASN_UNSIGNED32        },
    { "ASN_TIMETICKS",         ASN_TIMETICKS         },
    { "ASN_OPAQUE",            ASN_OPAQUE            },
    { "ASN_COUNTER64",         ASN_COUNTER64         },

    { "BER_CLASS"      , BER_CLASS       },
    { "BER_TAG"        , BER_TAG         },
    { "BER_CONSTRUCTED", BER_CONSTRUCTED },
    { "BER_DATA"       , BER_DATA        },
  };

  for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
    newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
}

SV *
ber_decode (SV *ber)
        CODE:
{
        buf = SvPVbyte (ber, len);
        cur = buf;
        rem = len;

        RETVAL = ber_decode ();
}
        OUTPUT: RETVAL

void
ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *constructed = &PL_sv_undef, SV *data = &PL_sv_undef)
        PROTOTYPE: $;$$$
        PPCODE:
{
        if (!SvOK (tuple))
          XSRETURN_NO;

        if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
          croak ("ber_seq: tuple must be ber tuple (array-ref)");

        AV *av = (AV *)SvRV (tuple);

        XPUSHs (
             (!SvOK (klass)       || SvIV  (AvARRAY (av)[BER_CLASS      ]) == SvIV (klass))
          && (!SvOK (tag)         || SvIV  (AvARRAY (av)[BER_TAG        ]) == SvIV (tag))
          && (!SvOK (constructed) || !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))
          && (!SvOK (data)        || sv_eq (AvARRAY (av)[BER_DATA       ], data))
          ? &PL_sv_yes : &PL_sv_no);
}

void
ber_is_seq (SV *tuple)
        PROTOTYPE: $
        PPCODE:
{
        if (!SvOK (tuple))
          XSRETURN_UNDEF;

        if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
          croak ("ber_seq: tuple must be ber tuple (array-ref)");

        AV *av = (AV *)SvRV (tuple);

        XPUSHs (
             SvIV (AvARRAY (av)[BER_CLASS      ]) == ASN_UNIVERSAL
          && SvIV (AvARRAY (av)[BER_TAG        ]) == ASN_SEQUENCE
          && SvIV (AvARRAY (av)[BER_CONSTRUCTED])
          ? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
}

void
ber_is_i32 (SV *tuple, IV value)
        PROTOTYPE: $$
        PPCODE:
{
        if (!SvOK (tuple))
          XSRETURN_NO;

        if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
          croak ("ber_seq: tuple must be ber tuple (array-ref)");

        AV *av = (AV *)SvRV (tuple);

        XPUSHs (
              SvIV (AvARRAY (av)[BER_CLASS      ]) == ASN_UNIVERSAL
          &&  SvIV (AvARRAY (av)[BER_TAG        ]) == ASN_INTEGER32
          && !SvIV (AvARRAY (av)[BER_CONSTRUCTED])
          &&  SvIV (AvARRAY (av)[BER_DATA       ]) == value
          ? &PL_sv_yes : &PL_sv_no);
}

void
ber_is_oid (SV *tuple, SV *oid)
        PROTOTYPE: $$
        PPCODE:
{
        if (!SvOK (tuple))
          XSRETURN_NO;

        if (!SvROK (tuple) || SvTYPE (SvRV (tuple)) != SVt_PVAV)
          croak ("ber_seq: tuple must be ber tuple (array-ref)");

        AV *av = (AV *)SvRV (tuple);

        XPUSHs (
              SvIV (AvARRAY (av)[BER_CLASS      ]) == ASN_UNIVERSAL
          &&  SvIV (AvARRAY (av)[BER_TAG        ]) == ASN_OBJECT_IDENTIFIER
          && !SvIV (AvARRAY (av)[BER_CONSTRUCTED])
          &&  sv_eq (AvARRAY (av)[BER_DATA], oid)
          ? &PL_sv_yes : &PL_sv_no);
}

Revision:	1.1
Committed:	Fri Apr 19 16:19:36 2019 UTC (5 years, 1 month ago) by root
Branch:	MAIN
Log Message:	* empty log message *
#	Content
1	#include "EXTERN.h"
2	#include "perl.h"
3	#include "XSUB.h"
4
5	// C99 required
6
7	enum {
8	// ASN_TAG
9	ASN_BOOLEAN = 0x01,
10	ASN_INTEGER32 = 0x02,
11	ASN_BIT_STRING = 0x03,
12	ASN_OCTET_STRING = 0x04,
13	ASN_NULL = 0x05,
14	ASN_OBJECT_IDENTIFIER = 0x06,
15	ASN_SEQUENCE = 0x10,
16
17	ASN_TAG_BER = 0x1f,
18	ASN_TAG_MASK = 0x1f,
19
20	// primitive/constructed
21	ASN_CONSTRUCTED = 0x20,
22
23	// ASN_CLASS
24	ASN_UNIVERSAL = 0x00,
25	ASN_APPLICATION = 0x40,
26	ASN_CONTEXT = 0x80,
27	ASN_PRIVATE = 0xc0,
28
29	ASN_CLASS_MASK = 0xc0,
30	ASN_CLASS_SHIFT = 6,
31
32	// ASN_APPLICATION
33	ASN_IPADDRESS = 0x00,
34	ASN_COUNTER32 = 0x01,
35	ASN_UNSIGNED32 = 0x02,
36	ASN_TIMETICKS = 0x03,
37	ASN_OPAQUE = 0x04,
38	ASN_COUNTER64 = 0x06,
39	};
40
41	enum {
42	BER_CLASS = 0,
43	BER_TAG = 1,
44	BER_CONSTRUCTED = 2,
45	BER_DATA = 3,
46	BER_ARRAYSIZE
47	};
48
49	#define MAX_OID_STRLEN 4096
50
51	static U8 buf, cur;
52	static STRLEN len, rem;
53
54	// for "small" integers, return a readonly sv, otherwise create a new one
55	static SV *newSVcacheint (int val)
56	{
57	static SV *cache[32];
58
59	if (val < 0 \|\| val >= sizeof (cache))
60	return newSViv (val);
61
62	if (!cache [val])
63	{
64	cache [val] = newSVuv (val);
65	SvREADONLY_on (cache [val]);
66	}
67
68	return SvREFCNT_inc_NN (cache [val]);
69	}
70
71	/////////////////////////////////////////////////////////////////////////////
72
73	static void
74	error (const char *errmsg)
75	{
76	croak ("%s at offset 0x%04x", errmsg, cur - buf);
77	}
78
79	static int
80	need (int count)
81	{
82	if (count < 0 \|\| (int)rem < count)
83	{
84	error ("unexpected end of message buffer");
85	return 0;
86	}
87
88	return 1;
89	}
90
91	static U8 *
92	getn (int count, const U8 *errres)
93	{
94	if (!need (count))
95	return (U8 *)errres;
96
97	U8 *res = cur;
98
99	cur += count;
100	rem -= count;
101
102	return res;
103	}
104
105	static U8
106	get8 (void)
107	{
108	if (rem <= 0)
109	{
110	error ("unexpected end of message buffer");
111	return 0;
112	}
113
114	rem--;
115	return *cur++;
116	}
117
118	static U32
119	getb (void)
120	{
121	U32 res = 0;
122
123	for (;;)
124	{
125	U8 c = get8 ();
126	res = (res << 7) \| (c & 0x7f);
127
128	if (!(c & 0x80))
129	return res;
130	}
131	}
132
133	static U32
134	process_length (void)
135	{
136	U32 res = get8 ();
137
138	if (res & 0x80)
139	{
140	int cnt = res & 0x7f;
141	res = 0;
142
143	switch (cnt)
144	{
145	case 0:
146	error ("indefinite ASN.1 lengths not supported");
147	return 0;
148
149	default:
150	error ("ASN.1 length too long");
151	return 0;
152
153	case 4: res = (res << 8) \| get8 ();
154	case 3: res = (res << 8) \| get8 ();
155	case 2: res = (res << 8) \| get8 ();
156	case 1: res = (res << 8) \| get8 ();
157	}
158	}
159
160	return res;
161	}
162
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 *
194	process_integer32_sv (void)
195	{
196	return newSViv ((I32)process_integer32 ());
197	}
198
199	static SV *
200	process_unsigned32_sv (void)
201	{
202	return newSVuv ((U32)process_integer32 ());
203	}
204
205	#if IVSIZE >= 8
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 *
267	write_uv (char *buf, U32 u)
268	{
269	// the one-digit case is absolutely predominant, so this pays off (hopefully)
270	if (u < 10)
271	*buf++ = u + '0';
272	else
273	{
274	char *beg = buf;
275
276	do
277	{
278	*buf++ = u % 10 + '0';
279	u /= 10;
280	}
281	while (u);
282
283	// reverse digits
284	for (char *ptr = buf; --ptr != beg; ++beg)
285	{
286	char c = *ptr;
287	ptr = beg;
288	*beg = c;
289	}
290	}
291
292	return buf;
293	}
294
295	static SV *
296	process_object_identifier_sv (void)
297	{
298	U32 length = process_length ();
299
300	if (length <= 0)
301	{
302	error ("OBJECT IDENTIFIER length equal to zero");
303	return &PL_sv_undef;
304	}
305
306	U8 *end = cur + length;
307	U32 w = getb ();
308
309	static char oid[MAX_OID_STRLEN]; // must be static
310	char *app = oid;
311
312	app = write_uv (app, (U8)w / 40);
313	*app++ = '.';
314	app = write_uv (app, (U8)w % 40);
315
316	// we assume an oid component is never > 64 bytes
317	while (cur < end && oid + sizeof (oid) - app > 64)
318	{
319	w = getb ();
320	*app++ = '.';
321	app = write_uv (app, w);
322	}
323
324	return newSVpvn (oid, app - oid);
325	}
326
327	static SV *
328	ber_decode ()
329	{
330	int identifier = get8 ();
331
332	SV *res;
333
334	int constructed = identifier & ASN_CONSTRUCTED;
335	int klass = identifier & ASN_CLASS_MASK;
336	int tag = identifier & ASN_TAG_MASK;
337
338	if (tag == ASN_TAG_BER)
339	tag = getb ();
340
341	if (tag == ASN_TAG_BER)
342	tag = getb ();
343
344	if (constructed)
345	{
346	U32 len = process_length ();
347	U32 seqend = (cur - buf) + len;
348	AV av = (AV )sv_2mortal ((SV *)newAV ());
349
350	while (cur < buf + seqend)
351	av_push (av, ber_decode ());
352
353	if (cur > buf + seqend)
354	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);
355
356	res = newRV_inc ((SV *)av);
357	}
358	else
359	switch (identifier)
360	{
361	case ASN_NULL:
362	res = &PL_sv_undef;
363	break;
364
365	case ASN_OBJECT_IDENTIFIER:
366	res = process_object_identifier_sv ();
367	break;
368
369	case ASN_INTEGER32:
370	res = process_integer32_sv ();
371	break;
372
373	case ASN_APPLICATION \| ASN_UNSIGNED32:
374	case ASN_APPLICATION \| ASN_COUNTER32:
375	case ASN_APPLICATION \| ASN_TIMETICKS:
376	res = process_unsigned32_sv ();
377	break;
378
379	#if 0 // handled by default case
380	case ASN_OCTET_STRING:
381	case ASN_APPLICATION \| ASN_IPADDRESS:
382	case ASN_APPLICATION \| ASN_OPAQUE:
383	res = process_octet_string_sv ();
384	break;
385	#endif
386
387	case ASN_APPLICATION \| ASN_COUNTER64:
388	res = process_integer64_sv ();
389	break;
390
391	default:
392	res = process_octet_string_sv ();
393	break;
394	}
395
396	AV *av = newAV ();
397	av_fill (av, BER_ARRAYSIZE - 1);
398	AvARRAY (av)[BER_CLASS ] = newSVcacheint (klass >> ASN_CLASS_SHIFT);
399	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
400	AvARRAY (av)[BER_CONSTRUCTED] = newSVcacheint (constructed ? 1 : 0);
401	AvARRAY (av)[BER_DATA ] = res;
402
403	return newRV_noinc ((SV *)av);
404	}
405
406	MODULE = Convert::BER::XS PACKAGE = Convert::BER::XS
407
408	PROTOTYPES: ENABLE
409
410	BOOT:
411	{
412	HV *stash = gv_stashpv ("Convert::BER::XS", 1);
413
414	static const struct {
415	const char *name;
416	IV iv;
417	} *civ, const_iv[] = {
418	{ "ASN_BOOLEAN", ASN_BOOLEAN },
419	{ "ASN_INTEGER32", ASN_INTEGER32 },
420	{ "ASN_BIT_STRING", ASN_BIT_STRING },
421	{ "ASN_OCTET_STRING", ASN_OCTET_STRING },
422	{ "ASN_NULL", ASN_NULL },
423	{ "ASN_OBJECT_IDENTIFIER", ASN_OBJECT_IDENTIFIER },
424	{ "ASN_TAG_BER", ASN_TAG_BER },
425	{ "ASN_TAG_MASK", ASN_TAG_MASK },
426	{ "ASN_CONSTRUCTED", ASN_CONSTRUCTED },
427	{ "ASN_UNIVERSAL", ASN_UNIVERSAL >> ASN_CLASS_SHIFT },
428	{ "ASN_APPLICATION", ASN_APPLICATION >> ASN_CLASS_SHIFT },
429	{ "ASN_CONTEXT", ASN_CONTEXT >> ASN_CLASS_SHIFT },
430	{ "ASN_PRIVATE", ASN_PRIVATE >> ASN_CLASS_SHIFT },
431	{ "ASN_CLASS_MASK", ASN_CLASS_MASK },
432	{ "ASN_CLASS_SHIFT", ASN_CLASS_SHIFT },
433	{ "ASN_SEQUENCE", ASN_SEQUENCE },
434	{ "ASN_IPADDRESS", ASN_IPADDRESS },
435	{ "ASN_COUNTER32", ASN_COUNTER32 },
436	{ "ASN_UNSIGNED32", ASN_UNSIGNED32 },
437	{ "ASN_TIMETICKS", ASN_TIMETICKS },
438	{ "ASN_OPAQUE", ASN_OPAQUE },
439	{ "ASN_COUNTER64", ASN_COUNTER64 },
440
441	{ "BER_CLASS" , BER_CLASS },
442	{ "BER_TAG" , BER_TAG },
443	{ "BER_CONSTRUCTED", BER_CONSTRUCTED },
444	{ "BER_DATA" , BER_DATA },
445	};
446
447	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));
449	}
450
451	SV *
452	ber_decode (SV *ber)
453	CODE:
454	{
455	buf = SvPVbyte (ber, len);
456	cur = buf;
457	rem = len;
458
459	RETVAL = ber_decode ();
460	}
461	OUTPUT: RETVAL
462
463	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)
465	PROTOTYPE: $;$$$
466	PPCODE:
467	{
468	if (!SvOK (tuple))
469	XSRETURN_NO;
470
471	if (!SvROK (tuple) \|\| SvTYPE (SvRV (tuple)) != SVt_PVAV)
472	croak ("ber_seq: tuple must be ber tuple (array-ref)");
473
474	AV av = (AV )SvRV (tuple);
475
476	XPUSHs (
477	(!SvOK (klass) \|\| SvIV (AvARRAY (av)[BER_CLASS ]) == SvIV (klass))
478	&& (!SvOK (tag) \|\| SvIV (AvARRAY (av)[BER_TAG ]) == SvIV (tag))
479	&& (!SvOK (constructed) \|\| !SvIV (AvARRAY (av)[BER_CONSTRUCTED]) == !SvIV (constructed))
480	&& (!SvOK (data) \|\| sv_eq (AvARRAY (av)[BER_DATA ], data))
481	? &PL_sv_yes : &PL_sv_no);
482	}
483
484	void
485	ber_is_seq (SV *tuple)
486	PROTOTYPE: $
487	PPCODE:
488	{
489	if (!SvOK (tuple))
490	XSRETURN_UNDEF;
491
492	if (!SvROK (tuple) \|\| SvTYPE (SvRV (tuple)) != SVt_PVAV)
493	croak ("ber_seq: tuple must be ber tuple (array-ref)");
494
495	AV av = (AV )SvRV (tuple);
496
497	XPUSHs (
498	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL
499	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_SEQUENCE
500	&& SvIV (AvARRAY (av)[BER_CONSTRUCTED])
501	? AvARRAY (av)[BER_DATA] : &PL_sv_undef);
502	}
503
504	void
505	ber_is_i32 (SV *tuple, IV value)
506	PROTOTYPE: $$
507	PPCODE:
508	{
509	if (!SvOK (tuple))
510	XSRETURN_NO;
511
512	if (!SvROK (tuple) \|\| SvTYPE (SvRV (tuple)) != SVt_PVAV)
513	croak ("ber_seq: tuple must be ber tuple (array-ref)");
514
515	AV av = (AV )SvRV (tuple);
516
517	XPUSHs (
518	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL
519	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_INTEGER32
520	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])
521	&& SvIV (AvARRAY (av)[BER_DATA ]) == value
522	? &PL_sv_yes : &PL_sv_no);
523	}
524
525	void
526	ber_is_oid (SV tuple, SV oid)
527	PROTOTYPE: $$
528	PPCODE:
529	{
530	if (!SvOK (tuple))
531	XSRETURN_NO;
532
533	if (!SvROK (tuple) \|\| SvTYPE (SvRV (tuple)) != SVt_PVAV)
534	croak ("ber_seq: tuple must be ber tuple (array-ref)");
535
536	AV av = (AV )SvRV (tuple);
537
538	XPUSHs (
539	SvIV (AvARRAY (av)[BER_CLASS ]) == ASN_UNIVERSAL
540	&& SvIV (AvARRAY (av)[BER_TAG ]) == ASN_OBJECT_IDENTIFIER
541	&& !SvIV (AvARRAY (av)[BER_CONSTRUCTED])
542	&& sv_eq (AvARRAY (av)[BER_DATA], oid)
543	? &PL_sv_yes : &PL_sv_no);
544	}
545