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Comparing Convert-BER-XS/XS.xs (file contents):
Revision 1.24 by root, Sun Apr 21 01:58:15 2019 UTC vs.
Revision 1.25 by root, Sun Apr 21 10:40:30 2019 UTC

… …
228} 228}
229 229
230// get_* functions fetch something from the buffer 230// get_* functions fetch something from the buffer
231// decode_* functions use get_* fun ctions to decode ber values 231// decode_* functions use get_* fun ctions to decode ber values
232 232
233// get single octet
234static U8
235get_u8 (void)
236{
237 if (cur == end)
238 error ("unexpected end of message buffer");
239
240 return *cur++;
241}
242
233// get n octets 243// get n octets
234static U8 * 244static U8 *
235get_n (UV count) 245get_n (UV count)
236{ 246{
237 want (count); 247 want (count);
238 U8 *res = cur; 248 U8 *res = cur;
239 cur += count; 249 cur += count;
240 return res; 250 return res;
241} 251}
242 252
243// get single octet
244static U8
245get_u8 (void)
246{
247 if (cur == end)
248 error ("unexpected end of message buffer");
249
250 return *cur++;
251}
252
253// get ber-encoded integer (i.e. pack "w") 253// get ber-encoded integer (i.e. pack "w")
254static UV 254static UV
255get_w (void) 255get_w (void)
256{ 256{
257 UV res = 0; 257 UV res = 0;
… …
261 error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)"); 261 error ("illegal BER padding (X.690 8.1.2.4.2, 8.19.2)");
262 262
263 for (;;) 263 for (;;)
264 { 264 {
265 if (expect_false (res >> UVSIZE * 8 - 7)) 265 if (expect_false (res >> UVSIZE * 8 - 7))
266 error ("BER variable integer overflow"); 266 error ("BER variable length integer overflow");
267 267
268 res = (res << 7) | (c & 0x7f); 268 res = (res << 7) | (c & 0x7f);
269 269
270 if (!(c & 0x80)) 270 if (!(c & 0x80))
271 return res; 271 return res;
… …
285 res = 0; 285 res = 0;
286 286
287 switch (cnt) 287 switch (cnt)
288 { 288 {
289 case 0: 289 case 0:
290 error ("indefinite ASN.1 lengths not supported"); 290 error ("indefinite BER value lengths not supported");
291 291
292 case 0x7f: 292 case 0x7f:
293 error ("ASN.1 reserved value in length (X.690 8.1.3.5)"); 293 error ("BER reserved value in length (X.690 8.1.3.5)");
294 294
295 default: 295 default:
296 error ("ASN.1 length too long (only up to 2**64 octets supported)"); 296 error ("BER value length too long (must fit into UV)");
297 297
298#if UVSIZE > 4
298 case 8: res = (res << 8) | get_u8 (); 299 case 8: res = (res << 8) | get_u8 ();
299 case 7: res = (res << 8) | get_u8 (); 300 case 7: res = (res << 8) | get_u8 ();
300 case 6: res = (res << 8) | get_u8 (); 301 case 6: res = (res << 8) | get_u8 ();
301 case 5: res = (res << 8) | get_u8 (); 302 case 5: res = (res << 8) | get_u8 ();
303#endif
302 case 4: res = (res << 8) | get_u8 (); 304 case 4: res = (res << 8) | get_u8 ();
303 case 3: res = (res << 8) | get_u8 (); 305 case 3: res = (res << 8) | get_u8 ();
304 case 2: res = (res << 8) | get_u8 (); 306 case 2: res = (res << 8) | get_u8 ();
305 case 1: res = (res << 8) | get_u8 (); 307 case 1: res = (res << 8) | get_u8 ();
306 } 308 }
… …
313decode_int (void) 315decode_int (void)
314{ 316{
315 UV len = get_length (); 317 UV len = get_length ();
316 318
317 if (!len) 319 if (!len)
318 error ("invalid integer length equal to zero (X.690 8.3.1)"); 320 error ("invalid BER_TYPE_INT length zero (X.690 8.3.1)");
319 321
320 U8 *data = get_n (len); 322 U8 *data = get_n (len);
321 323
322 if (expect_false (len > 1)) 324 if (expect_false (len > 1))
323 { 325 {
324 U16 mask = (data [0] << 8) | data [1] & 0xff80; 326 U16 mask = (data [0] << 8) | data [1] & 0xff80;
325 327
326 if (expect_false (mask == 0xff80 || mask == 0x0000)) 328 if (expect_false (mask == 0xff80 || mask == 0x0000))
327 error ("illegal padding in integer (X.690 8.3.2)"); 329 error ("illegal padding in BER_TYPE_INT (X.690 8.3.2)");
328 } 330 }
329 331
330 int negative = data [0] & 0x80; 332 int negative = data [0] & 0x80;
331 333
332 UV val = negative ? -1 : 0; // copy signbit to all bits 334 UV val = negative ? -1 : 0; // copy signbit to all bits
333 335
334 if (len > UVSIZE + (!negative && !*data)) 336 if (len > UVSIZE + (!negative && !*data))
335 error ("INTEGER overflow"); 337 error ("BER_TYPE_INT overflow");
336 338
337 do 339 do
338 val = (val << 8) | *data++; 340 val = (val << 8) | *data++;
339 while (--len); 341 while (--len);
340 342
… …
388{ 390{
389 UV len = get_length (); 391 UV len = get_length ();
390 392
391 if (len <= 0) 393 if (len <= 0)
392 { 394 {
393 error ("OBJECT IDENTIFIER length equal to zero"); 395 error ("BER_TYPE_OID length must not be zero");
394 return &PL_sv_undef; 396 return &PL_sv_undef;
395 } 397 }
396 398
397 U8 *end = cur + len; 399 U8 *end = cur + len;
398 UV w = get_w (); 400 UV w = get_w ();
… …
487 489
488 while (cur < buf + seqend) 490 while (cur < buf + seqend)
489 av_push (av, decode_ber ()); 491 av_push (av, decode_ber ());
490 492
491 if (cur > buf + seqend) 493 if (cur > buf + seqend)
492 croak ("constructed type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend); 494 croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
493 495
494 res = newRV_inc ((SV *)av); 496 res = newRV_inc ((SV *)av);
495 } 497 }
496 else 498 else
497 switch (profile_lookup (cur_profile, klass, tag)) 499 switch (profile_lookup (cur_profile, klass, tag))
… …
562 case BER_TYPE_UCS4: 564 case BER_TYPE_UCS4:
563 res = decode_ucs (4); 565 res = decode_ucs (4);
564 break; 566 break;
565 567
566 case BER_TYPE_REAL: 568 case BER_TYPE_REAL:
569 error ("BER_TYPE_REAL not implemented");
570
567 case BER_TYPE_CROAK: 571 case BER_TYPE_CROAK:
572 croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
573
568 default: 574 default:
569 croak ("unconfigured/unsupported class/tag %d/%d", klass, tag); 575 croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
570 } 576 }
571 577
572 AV *av = newAV (); 578 AV *av = newAV ();
… …
923 // and adjust later 929 // and adjust later
924 need (1); 930 need (1);
925 STRLEN mark = len_fixup_mark (); 931 STRLEN mark = len_fixup_mark ();
926 932
927 if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV)) 933 if (expect_false (!SvROK (data) || SvTYPE (SvRV (data)) != SVt_PVAV))
928 croak ("BER constructed data must be array-reference"); 934 croak ("BER CONSTRUCTED data must be array-reference");
929 935
930 AV *av = (AV *)SvRV (data); 936 AV *av = (AV *)SvRV (data);
931 int fill = AvFILL (av); 937 int fill = AvFILL (av);
932 938
933 if (expect_false (SvRMAGICAL (av))) 939 if (expect_false (SvRMAGICAL (av)))
934 croak ("BER constructed data must not be tied"); 940 croak ("BER CONSTRUCTED data must not be tied");
935 941
936 int i; 942 int i;
937 for (i = 0; i <= fill; ++i) 943 for (i = 0; i <= fill; ++i)
938 encode_ber (AvARRAY (av)[i]); 944 encode_ber (AvARRAY (av)[i]);
939 945
… …
994 case BER_TYPE_UCS4: 1000 case BER_TYPE_UCS4:
995 encode_ucs (data, 4); 1001 encode_ucs (data, 4);
996 break; 1002 break;
997 1003
998 case BER_TYPE_REAL: 1004 case BER_TYPE_REAL:
1005 croak ("BER_TYPE_REAL not implemented");
1006
999 case BER_TYPE_CROAK: 1007 case BER_TYPE_CROAK:
1008 croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
1009
1000 default: 1010 default:
1001 croak ("unconfigured/unsupported class/tag %d/%d", klass, tag); 1011 croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
1002 } 1012 }
1003 1013
1004} 1014}
… …
1107 PUSHs (sv_2mortal (tuple)); 1117 PUSHs (sv_2mortal (tuple));
1108 1118
1109 if (ix) 1119 if (ix)
1110 PUSHs (sv_2mortal (newSViv (cur - buf))); 1120 PUSHs (sv_2mortal (newSViv (cur - buf)));
1111 else if (cur != end) 1121 else if (cur != end)
1112 error ("trailing garbage after BER data"); 1122 error ("trailing garbage after BER value");
1113} 1123}
1114 1124
1115void 1125void
1116ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *flags = &PL_sv_undef, SV *data = &PL_sv_undef) 1126ber_is (SV *tuple, SV *klass = &PL_sv_undef, SV *tag = &PL_sv_undef, SV *flags = &PL_sv_undef, SV *data = &PL_sv_undef)
1117 PPCODE: 1127 PPCODE:

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