D-Bus  1.12.2
dbus-sha.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-sha.c SHA-1 implementation
3  *
4  * Copyright (C) 2003 Red Hat Inc.
5  * Copyright (C) 1995 A. M. Kuchling
6  *
7  * Licensed under the Academic Free License version 2.1
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  *
23  */
24 
25 #include <config.h>
26 #include "dbus-internals.h"
27 #include "dbus-sha.h"
28 #include "dbus-marshal-basic.h" /* for byteswap routines */
29 #include <string.h>
30 
31 /* The following comments have the history of where this code
32  * comes from. I actually copied it from GNet in GNOME CVS.
33  * - hp@redhat.com
34  */
35 
36 /*
37  * sha.h : Implementation of the Secure Hash Algorithm
38  *
39  * Part of the Python Cryptography Toolkit, version 1.0.0
40  *
41  * Copyright (C) 1995, A.M. Kuchling
42  *
43  * Distribute and use freely; there are no restrictions on further
44  * dissemination and usage except those imposed by the laws of your
45  * country of residence.
46  *
47  */
48 
49 /* SHA: NIST's Secure Hash Algorithm */
50 
51 /* Based on SHA code originally posted to sci.crypt by Peter Gutmann
52  in message <30ajo5$oe8@ccu2.auckland.ac.nz>.
53  Modified to test for endianness on creation of SHA objects by AMK.
54  Also, the original specification of SHA was found to have a weakness
55  by NSA/NIST. This code implements the fixed version of SHA.
56 */
57 
58 /* Here's the first paragraph of Peter Gutmann's posting:
59 
60 The following is my SHA (FIPS 180) code updated to allow use of the "fixed"
61 SHA, thanks to Jim Gillogly and an anonymous contributor for the information on
62 what's changed in the new version. The fix is a simple change which involves
63 adding a single rotate in the initial expansion function. It is unknown
64 whether this is an optimal solution to the problem which was discovered in the
65 SHA or whether it's simply a bandaid which fixes the problem with a minimum of
66 effort (for example the reengineering of a great many Capstone chips).
67 */
68 
88 #ifndef DOXYGEN_SHOULD_SKIP_THIS
89 
90 /* The SHA block size and message digest sizes, in bytes */
91 
92 #define SHA_DATASIZE 64
93 #define SHA_DIGESTSIZE 20
94 
95 /* The SHA f()-functions. The f1 and f3 functions can be optimized to
96  save one boolean operation each - thanks to Rich Schroeppel,
97  rcs@cs.arizona.edu for discovering this */
98 
99 /*#define f1(x,y,z) ( ( x & y ) | ( ~x & z ) ) // Rounds 0-19 */
100 #define f1(x,y,z) ( z ^ ( x & ( y ^ z ) ) ) /* Rounds 0-19 */
101 #define f2(x,y,z) ( x ^ y ^ z ) /* Rounds 20-39 */
102 /*#define f3(x,y,z) ( ( x & y ) | ( x & z ) | ( y & z ) ) // Rounds 40-59 */
103 #define f3(x,y,z) ( ( x & y ) | ( z & ( x | y ) ) ) /* Rounds 40-59 */
104 #define f4(x,y,z) ( x ^ y ^ z ) /* Rounds 60-79 */
105 
106 /* The SHA Mysterious Constants */
107 
108 #define K1 0x5A827999L /* Rounds 0-19 */
109 #define K2 0x6ED9EBA1L /* Rounds 20-39 */
110 #define K3 0x8F1BBCDCL /* Rounds 40-59 */
111 #define K4 0xCA62C1D6L /* Rounds 60-79 */
112 
113 /* SHA initial values */
114 
115 #define h0init 0x67452301L
116 #define h1init 0xEFCDAB89L
117 #define h2init 0x98BADCFEL
118 #define h3init 0x10325476L
119 #define h4init 0xC3D2E1F0L
120 
121 /* Note that it may be necessary to add parentheses to these macros if they
122  are to be called with expressions as arguments */
123 /* 32-bit rotate left - kludged with shifts */
124 
125 #define ROTL(n,X) ( ( ( X ) << n ) | ( ( X ) >> ( 32 - n ) ) )
126 
127 /* The initial expanding function. The hash function is defined over an
128  80-word expanded input array W, where the first 16 are copies of the input
129  data, and the remaining 64 are defined by
130 
131  W[ i ] = W[ i - 16 ] ^ W[ i - 14 ] ^ W[ i - 8 ] ^ W[ i - 3 ]
132 
133  This implementation generates these values on the fly in a circular
134  buffer - thanks to Colin Plumb, colin@nyx10.cs.du.edu for this
135  optimization.
136 
137  The updated SHA changes the expanding function by adding a rotate of 1
138  bit. Thanks to Jim Gillogly, jim@rand.org, and an anonymous contributor
139  for this information */
140 
141 #define expand(W,i) ( W[ i & 15 ] = ROTL( 1, ( W[ i & 15 ] ^ W[ (i - 14) & 15 ] ^ \
142  W[ (i - 8) & 15 ] ^ W[ (i - 3) & 15 ] ) ) )
143 
144 
145 /* The prototype SHA sub-round. The fundamental sub-round is:
146 
147  a' = e + ROTL( 5, a ) + f( b, c, d ) + k + data;
148  b' = a;
149  c' = ROTL( 30, b );
150  d' = c;
151  e' = d;
152 
153  but this is implemented by unrolling the loop 5 times and renaming the
154  variables ( e, a, b, c, d ) = ( a', b', c', d', e' ) each iteration.
155  This code is then replicated 20 times for each of the 4 functions, using
156  the next 20 values from the W[] array each time */
157 
158 #define subRound(a, b, c, d, e, f, k, data) \
159  ( e += ROTL( 5, a ) + f( b, c, d ) + k + data, b = ROTL( 30, b ) )
160 
161 #endif /* !DOXYGEN_SHOULD_SKIP_THIS */
162 
163 /* Perform the SHA transformation. Note that this code, like MD5, seems to
164  break some optimizing compilers due to the complexity of the expressions
165  and the size of the basic block. It may be necessary to split it into
166  sections, e.g. based on the four subrounds
167 
168  Note that this corrupts the context->data area */
169 
170 static void
171 SHATransform(dbus_uint32_t *digest, dbus_uint32_t *data)
172 {
173  dbus_uint32_t A, B, C, D, E; /* Local vars */
174  dbus_uint32_t eData[16]; /* Expanded data */
175 
176  /* Set up first buffer and local data buffer */
177  A = digest[0];
178  B = digest[1];
179  C = digest[2];
180  D = digest[3];
181  E = digest[4];
182  memmove (eData, data, SHA_DATASIZE);
183 
184  /* Heavy mangling, in 4 sub-rounds of 20 interations each. */
185  subRound (A, B, C, D, E, f1, K1, eData[0]);
186  subRound (E, A, B, C, D, f1, K1, eData[1]);
187  subRound (D, E, A, B, C, f1, K1, eData[2]);
188  subRound (C, D, E, A, B, f1, K1, eData[3]);
189  subRound (B, C, D, E, A, f1, K1, eData[4]);
190  subRound (A, B, C, D, E, f1, K1, eData[5]);
191  subRound (E, A, B, C, D, f1, K1, eData[6]);
192  subRound (D, E, A, B, C, f1, K1, eData[7]);
193  subRound (C, D, E, A, B, f1, K1, eData[8]);
194  subRound (B, C, D, E, A, f1, K1, eData[9]);
195  subRound (A, B, C, D, E, f1, K1, eData[10]);
196  subRound (E, A, B, C, D, f1, K1, eData[11]);
197  subRound (D, E, A, B, C, f1, K1, eData[12]);
198  subRound (C, D, E, A, B, f1, K1, eData[13]);
199  subRound (B, C, D, E, A, f1, K1, eData[14]);
200  subRound (A, B, C, D, E, f1, K1, eData[15]);
201  subRound (E, A, B, C, D, f1, K1, expand ( eData, 16) );
202  subRound (D, E, A, B, C, f1, K1, expand ( eData, 17) );
203  subRound (C, D, E, A, B, f1, K1, expand ( eData, 18) );
204  subRound (B, C, D, E, A, f1, K1, expand ( eData, 19) );
205 
206  subRound (A, B, C, D, E, f2, K2, expand ( eData, 20) );
207  subRound (E, A, B, C, D, f2, K2, expand ( eData, 21) );
208  subRound (D, E, A, B, C, f2, K2, expand ( eData, 22) );
209  subRound (C, D, E, A, B, f2, K2, expand ( eData, 23) );
210  subRound (B, C, D, E, A, f2, K2, expand ( eData, 24) );
211  subRound (A, B, C, D, E, f2, K2, expand ( eData, 25) );
212  subRound (E, A, B, C, D, f2, K2, expand ( eData, 26) );
213  subRound (D, E, A, B, C, f2, K2, expand ( eData, 27) );
214  subRound (C, D, E, A, B, f2, K2, expand ( eData, 28) );
215  subRound (B, C, D, E, A, f2, K2, expand ( eData, 29) );
216  subRound (A, B, C, D, E, f2, K2, expand ( eData, 30) );
217  subRound (E, A, B, C, D, f2, K2, expand ( eData, 31) );
218  subRound (D, E, A, B, C, f2, K2, expand ( eData, 32) );
219  subRound (C, D, E, A, B, f2, K2, expand ( eData, 33) );
220  subRound (B, C, D, E, A, f2, K2, expand ( eData, 34) );
221  subRound (A, B, C, D, E, f2, K2, expand ( eData, 35) );
222  subRound (E, A, B, C, D, f2, K2, expand ( eData, 36) );
223  subRound (D, E, A, B, C, f2, K2, expand ( eData, 37) );
224  subRound (C, D, E, A, B, f2, K2, expand ( eData, 38) );
225  subRound (B, C, D, E, A, f2, K2, expand ( eData, 39) );
226 
227  subRound (A, B, C, D, E, f3, K3, expand ( eData, 40) );
228  subRound (E, A, B, C, D, f3, K3, expand ( eData, 41) );
229  subRound (D, E, A, B, C, f3, K3, expand ( eData, 42) );
230  subRound (C, D, E, A, B, f3, K3, expand ( eData, 43) );
231  subRound (B, C, D, E, A, f3, K3, expand ( eData, 44) );
232  subRound (A, B, C, D, E, f3, K3, expand ( eData, 45) );
233  subRound (E, A, B, C, D, f3, K3, expand ( eData, 46) );
234  subRound (D, E, A, B, C, f3, K3, expand ( eData, 47) );
235  subRound (C, D, E, A, B, f3, K3, expand ( eData, 48) );
236  subRound (B, C, D, E, A, f3, K3, expand ( eData, 49) );
237  subRound (A, B, C, D, E, f3, K3, expand ( eData, 50) );
238  subRound (E, A, B, C, D, f3, K3, expand ( eData, 51) );
239  subRound (D, E, A, B, C, f3, K3, expand ( eData, 52) );
240  subRound (C, D, E, A, B, f3, K3, expand ( eData, 53) );
241  subRound (B, C, D, E, A, f3, K3, expand ( eData, 54) );
242  subRound (A, B, C, D, E, f3, K3, expand ( eData, 55) );
243  subRound (E, A, B, C, D, f3, K3, expand ( eData, 56) );
244  subRound (D, E, A, B, C, f3, K3, expand ( eData, 57) );
245  subRound (C, D, E, A, B, f3, K3, expand ( eData, 58) );
246  subRound (B, C, D, E, A, f3, K3, expand ( eData, 59) );
247 
248  subRound (A, B, C, D, E, f4, K4, expand ( eData, 60) );
249  subRound (E, A, B, C, D, f4, K4, expand ( eData, 61) );
250  subRound (D, E, A, B, C, f4, K4, expand ( eData, 62) );
251  subRound (C, D, E, A, B, f4, K4, expand ( eData, 63) );
252  subRound (B, C, D, E, A, f4, K4, expand ( eData, 64) );
253  subRound (A, B, C, D, E, f4, K4, expand ( eData, 65) );
254  subRound (E, A, B, C, D, f4, K4, expand ( eData, 66) );
255  subRound (D, E, A, B, C, f4, K4, expand ( eData, 67) );
256  subRound (C, D, E, A, B, f4, K4, expand ( eData, 68) );
257  subRound (B, C, D, E, A, f4, K4, expand ( eData, 69) );
258  subRound (A, B, C, D, E, f4, K4, expand ( eData, 70) );
259  subRound (E, A, B, C, D, f4, K4, expand ( eData, 71) );
260  subRound (D, E, A, B, C, f4, K4, expand ( eData, 72) );
261  subRound (C, D, E, A, B, f4, K4, expand ( eData, 73) );
262  subRound (B, C, D, E, A, f4, K4, expand ( eData, 74) );
263  subRound (A, B, C, D, E, f4, K4, expand ( eData, 75) );
264  subRound (E, A, B, C, D, f4, K4, expand ( eData, 76) );
265  subRound (D, E, A, B, C, f4, K4, expand ( eData, 77) );
266  subRound (C, D, E, A, B, f4, K4, expand ( eData, 78) );
267  subRound (B, C, D, E, A, f4, K4, expand ( eData, 79) );
268 
269  /* Build message digest */
270  digest[0] += A;
271  digest[1] += B;
272  digest[2] += C;
273  digest[3] += D;
274  digest[4] += E;
275 }
276 
277 /* When run on a little-endian CPU we need to perform byte reversal on an
278  array of longwords. */
279 
280 #ifdef WORDS_BIGENDIAN
281 #define swap_words(buffer, byte_count)
282 #else
283 static void
284 swap_words (dbus_uint32_t *buffer,
285  int byte_count)
286 {
287  byte_count /= sizeof (dbus_uint32_t);
288  while (byte_count--)
289  {
290  *buffer = DBUS_UINT32_SWAP_LE_BE (*buffer);
291  ++buffer;
292  }
293 }
294 #endif
295 
296 static void
297 sha_init (DBusSHAContext *context)
298 {
299  /* Set the h-vars to their initial values */
300  context->digest[0] = h0init;
301  context->digest[1] = h1init;
302  context->digest[2] = h2init;
303  context->digest[3] = h3init;
304  context->digest[4] = h4init;
305 
306  /* Initialise bit count */
307  context->count_lo = context->count_hi = 0;
308 }
309 
310 static void
311 sha_append (DBusSHAContext *context,
312  const unsigned char *buffer,
313  unsigned int count)
314 {
315  dbus_uint32_t tmp;
316  unsigned int dataCount;
317 
318  /* Update bitcount */
319  tmp = context->count_lo;
320  if (( context->count_lo = tmp + ( ( dbus_uint32_t) count << 3) ) < tmp)
321  context->count_hi++; /* Carry from low to high */
322  context->count_hi += count >> 29;
323 
324  /* Get count of bytes already in data */
325  dataCount = (int) (tmp >> 3) & 0x3F;
326 
327  /* Handle any leading odd-sized chunks */
328  if (dataCount)
329  {
330  unsigned char *p = (unsigned char *) context->data + dataCount;
331 
332  dataCount = SHA_DATASIZE - dataCount;
333  if (count < dataCount)
334  {
335  memmove (p, buffer, count);
336  return;
337  }
338  memmove (p, buffer, dataCount);
339  swap_words (context->data, SHA_DATASIZE);
340  SHATransform (context->digest, context->data);
341  buffer += dataCount;
342  count -= dataCount;
343  }
344 
345  /* Process data in SHA_DATASIZE chunks */
346  while (count >= SHA_DATASIZE)
347  {
348  memmove (context->data, buffer, SHA_DATASIZE);
349  swap_words (context->data, SHA_DATASIZE);
350  SHATransform (context->digest, context->data);
351  buffer += SHA_DATASIZE;
352  count -= SHA_DATASIZE;
353  }
354 
355  /* Handle any remaining bytes of data. */
356  memmove (context->data, buffer, count);
357 }
358 
359 
360 /* Final wrapup - pad to SHA_DATASIZE-byte boundary with the bit pattern
361  1 0* (64-bit count of bits processed, MSB-first) */
362 
363 static void
364 sha_finish (DBusSHAContext *context, unsigned char digest[20])
365 {
366  int count;
367  unsigned char *data_p;
368 
369  /* Compute number of bytes mod 64 */
370  count = (int) context->count_lo;
371  count = (count >> 3) & 0x3F;
372 
373  /* Set the first char of padding to 0x80. This is safe since there is
374  always at least one byte free */
375  data_p = (unsigned char *) context->data + count;
376  *data_p++ = 0x80;
377 
378  /* Bytes of padding needed to make 64 bytes */
379  count = SHA_DATASIZE - 1 - count;
380 
381  /* Pad out to 56 mod 64 */
382  if (count < 8)
383  {
384  /* Two lots of padding: Pad the first block to 64 bytes */
385  memset (data_p, 0, count);
386  swap_words (context->data, SHA_DATASIZE);
387  SHATransform (context->digest, context->data);
388 
389  /* Now fill the next block with 56 bytes */
390  memset (context->data, 0, SHA_DATASIZE - 8);
391  }
392  else
393  /* Pad block to 56 bytes */
394  memset (data_p, 0, count - 8);
395 
396  /* Append length in bits and transform */
397  context->data[14] = context->count_hi;
398  context->data[15] = context->count_lo;
399 
400  swap_words (context->data, SHA_DATASIZE - 8);
401  SHATransform (context->digest, context->data);
402  swap_words (context->digest, SHA_DIGESTSIZE);
403  memmove (digest, context->digest, SHA_DIGESTSIZE);
404 }
405  /* End of internals */
407 
419 void
421 {
422  sha_init (context);
423 }
424 
431 void
433  const DBusString *data)
434 {
435  unsigned int inputLen;
436  const unsigned char *input;
437 
438  input = (const unsigned char*) _dbus_string_get_const_data (data);
439  inputLen = _dbus_string_get_length (data);
440 
441  sha_append (context, input, inputLen);
442 }
443 
457  DBusString *results)
458 {
459  unsigned char digest[20];
460 
461  sha_finish (context, digest);
462 
463  if (!_dbus_string_append_len (results, (const char *) digest, 20))
464  return FALSE;
465 
466  /* some kind of security paranoia, though it seems pointless
467  * to me given the nonzeroed stuff flying around
468  */
469  _DBUS_ZERO(*context);
470 
471  return TRUE;
472 }
473 
484  DBusString *ascii_output)
485 {
486  DBusSHAContext context;
487  DBusString digest;
488 
489  _dbus_sha_init (&context);
490 
491  _dbus_sha_update (&context, data);
492 
493  if (!_dbus_string_init (&digest))
494  return FALSE;
495 
496  if (!_dbus_sha_final (&context, &digest))
497  goto error;
498 
499  if (!_dbus_string_hex_encode (&digest, 0, ascii_output,
500  _dbus_string_get_length (ascii_output)))
501  goto error;
502 
503  _dbus_string_free (&digest);
504 
505  return TRUE;
506 
507  error:
508  _dbus_string_free (&digest);
509  return FALSE;
510 }
511  /* end of exported functions */
513 
514 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
515 #include "dbus-test.h"
516 #include <stdio.h>
517 
518 static dbus_bool_t
519 check_sha_binary (const unsigned char *input,
520  int input_len,
521  const char *expected)
522 {
523  DBusString input_str;
524  DBusString expected_str;
525  DBusString results;
526 
527  _dbus_string_init_const_len (&input_str, (const char *) input, input_len);
528  _dbus_string_init_const (&expected_str, expected);
529 
530  if (!_dbus_string_init (&results))
531  _dbus_assert_not_reached ("no memory for SHA-1 results");
532 
533  if (!_dbus_sha_compute (&input_str, &results))
534  _dbus_assert_not_reached ("no memory for SHA-1 results");
535 
536  if (!_dbus_string_equal (&expected_str, &results))
537  {
538  _dbus_warn ("Expected hash %s got %s for SHA-1 sum",
539  expected,
540  _dbus_string_get_const_data (&results));
541  _dbus_string_free (&results);
542  return FALSE;
543  }
544 
545  _dbus_string_free (&results);
546  return TRUE;
547 }
548 
549 static dbus_bool_t
550 check_sha_str (const char *input,
551  const char *expected)
552 {
553  return check_sha_binary ((unsigned char *) input, strlen (input), expected);
554 }
555 
556 static dbus_bool_t
557 decode_compact_string (const DBusString *line,
558  DBusString *decoded)
559 {
560  int n_bits;
561  dbus_bool_t current_b;
562  int offset;
563  int next;
564  long val;
565  int length_bytes;
566 
567  offset = 0;
568  next = 0;
569 
570  if (!_dbus_string_parse_int (line, offset, &val, &next))
571  {
572  fprintf (stderr, "could not parse length at start of compact string: %s\n",
573  _dbus_string_get_const_data (line));
574  return FALSE;
575  }
576 
577  _dbus_string_skip_blank (line, next, &next);
578 
579  offset = next;
580  if (!_dbus_string_parse_int (line, offset, &val, &next))
581  {
582  fprintf (stderr, "could not parse start bit 'b' in compact string: %s\n",
583  _dbus_string_get_const_data (line));
584  return FALSE;
585  }
586 
587  if (!(val == 0 || val == 1))
588  {
589  fprintf (stderr, "the value 'b' must be 0 or 1, see sha-1/Readme.txt\n");
590  return FALSE;
591  }
592 
593  _dbus_string_skip_blank (line, next, &next);
594 
595  current_b = val;
596  n_bits = 0;
597 
598  while (next < _dbus_string_get_length (line))
599  {
600  int total_bits;
601 
602  offset = next;
603 
604  if (_dbus_string_get_byte (line, offset) == '^')
605  break;
606 
607  if (!_dbus_string_parse_int (line, offset, &val, &next))
608  {
609  fprintf (stderr, "could not parse bit count in compact string\n");
610  return FALSE;
611  }
612 
613  /* We now append "val" copies of "current_b" bits to the string */
614  total_bits = n_bits + val;
615  while (n_bits < total_bits)
616  {
617  int byte_containing_next_bit = n_bits / 8;
618  int bit_containing_next_bit = 7 - (n_bits % 8);
619  unsigned char old_byte;
620 
621  if (byte_containing_next_bit >= _dbus_string_get_length (decoded))
622  {
623  if (!_dbus_string_set_length (decoded, byte_containing_next_bit + 1))
624  _dbus_assert_not_reached ("no memory to extend to next byte");
625  }
626 
627  old_byte = _dbus_string_get_byte (decoded, byte_containing_next_bit);
628  old_byte |= current_b << bit_containing_next_bit;
629 
630 #if 0
631  printf ("Appending bit %d to byte %d at bit %d resulting in byte 0x%x\n",
632  current_b, byte_containing_next_bit,
633  bit_containing_next_bit, old_byte);
634 #endif
635 
636  _dbus_string_set_byte (decoded, byte_containing_next_bit, old_byte);
637 
638  ++n_bits;
639  }
640 
641  _dbus_string_skip_blank (line, next, &next);
642 
643  current_b = !current_b;
644  }
645 
646  length_bytes = (n_bits / 8 + ((n_bits % 8) ? 1 : 0));
647 
648  if (_dbus_string_get_length (decoded) != length_bytes)
649  {
650  fprintf (stderr, "Expected length %d bytes %d bits for compact string, got %d bytes\n",
651  length_bytes, n_bits, _dbus_string_get_length (decoded));
652  return FALSE;
653  }
654  else
655  return TRUE;
656 }
657 
658 static dbus_bool_t
659 get_next_expected_result (DBusString *results,
660  DBusString *result)
661 {
662  DBusString line;
663  dbus_bool_t retval;
664 
665  retval = FALSE;
666 
667  if (!_dbus_string_init (&line))
668  _dbus_assert_not_reached ("no memory");
669 
670  next_iteration:
671  while (_dbus_string_pop_line (results, &line))
672  {
673  _dbus_string_delete_leading_blanks (&line);
674 
675  if (_dbus_string_get_length (&line) == 0)
676  goto next_iteration;
677  else if (_dbus_string_starts_with_c_str (&line, "#"))
678  goto next_iteration;
679  else if (_dbus_string_starts_with_c_str (&line, "H>"))
680  {
681  /* don't print */
682  }
683  else if (_dbus_string_starts_with_c_str (&line, "D>") ||
684  _dbus_string_starts_with_c_str (&line, "<D"))
685  goto next_iteration;
686  else
687  {
688  int i;
689 
690  if (!_dbus_string_move (&line, 0, result, 0))
691  _dbus_assert_not_reached ("no memory");
692 
693  i = 0;
694  while (i < _dbus_string_get_length (result))
695  {
696  unsigned char c = _dbus_string_get_byte (result, i);
697 
698  switch (c)
699  {
700  case 'A':
701  _dbus_string_set_byte (result, i, 'a');
702  break;
703  case 'B':
704  _dbus_string_set_byte (result, i, 'b');
705  break;
706  case 'C':
707  _dbus_string_set_byte (result, i, 'c');
708  break;
709  case 'D':
710  _dbus_string_set_byte (result, i, 'd');
711  break;
712  case 'E':
713  _dbus_string_set_byte (result, i, 'e');
714  break;
715  case 'F':
716  _dbus_string_set_byte (result, i, 'f');
717  break;
718  case '^':
719  case ' ':
720  _dbus_string_delete (result, i, 1);
721  --i; /* to offset ++i below */
722  break;
723  default:
724  if ((c < '0' || c > '9') && (c < 'a' || c > 'f'))
725  _dbus_assert_not_reached ("invalid SHA-1 test script");
726  }
727 
728  ++i;
729  }
730 
731  break;
732  }
733  }
734 
735  retval = TRUE;
736 
737  /* out: */
738  _dbus_string_free (&line);
739  return retval;
740 }
741 
742 static dbus_bool_t
743 process_test_data (const char *test_data_dir)
744 {
745  DBusString tests_file;
746  DBusString results_file;
747  DBusString tests;
748  DBusString results;
749  DBusString line;
750  DBusString tmp;
751  int line_no;
752  dbus_bool_t retval;
753  int success_count;
754  DBusError error = DBUS_ERROR_INIT;
755 
756  retval = FALSE;
757 
758  if (!_dbus_string_init (&tests_file))
759  _dbus_assert_not_reached ("no memory");
760 
761  if (!_dbus_string_init (&results_file))
762  _dbus_assert_not_reached ("no memory");
763 
764  if (!_dbus_string_init (&tests))
765  _dbus_assert_not_reached ("no memory");
766 
767  if (!_dbus_string_init (&results))
768  _dbus_assert_not_reached ("no memory");
769 
770  if (!_dbus_string_init (&line))
771  _dbus_assert_not_reached ("no memory");
772 
773  if (!_dbus_string_append (&tests_file, test_data_dir))
774  _dbus_assert_not_reached ("no memory");
775 
776  if (!_dbus_string_append (&results_file, test_data_dir))
777  _dbus_assert_not_reached ("no memory");
778 
779  _dbus_string_init_const (&tmp, "sha-1/byte-messages.sha1");
780  if (!_dbus_concat_dir_and_file (&tests_file, &tmp))
781  _dbus_assert_not_reached ("no memory");
782 
783  _dbus_string_init_const (&tmp, "sha-1/byte-hashes.sha1");
784  if (!_dbus_concat_dir_and_file (&results_file, &tmp))
785  _dbus_assert_not_reached ("no memory");
786 
787  if (!_dbus_file_get_contents (&tests, &tests_file, &error))
788  {
789  fprintf (stderr, "could not load test data file %s: %s\n",
790  _dbus_string_get_const_data (&tests_file),
791  error.message);
792  dbus_error_free (&error);
793  goto out;
794  }
795 
796  if (!_dbus_file_get_contents (&results, &results_file, &error))
797  {
798  fprintf (stderr, "could not load results data file %s: %s\n",
799  _dbus_string_get_const_data (&results_file), error.message);
800  dbus_error_free (&error);
801  goto out;
802  }
803 
804  success_count = 0;
805  line_no = 0;
806  next_iteration:
807  while (_dbus_string_pop_line (&tests, &line))
808  {
809  line_no += 1;
810 
811  _dbus_string_delete_leading_blanks (&line);
812 
813  if (_dbus_string_get_length (&line) == 0)
814  goto next_iteration;
815  else if (_dbus_string_starts_with_c_str (&line, "#"))
816  goto next_iteration;
817  else if (_dbus_string_starts_with_c_str (&line, "H>"))
818  {
819  printf ("SHA-1: %s\n", _dbus_string_get_const_data (&line));
820 
821  if (_dbus_string_find (&line, 0, "Type 3", NULL))
822  {
823  /* See sha-1/Readme.txt - the "Type 3" tests are
824  * random seeds, rather than data to be hashed.
825  * we'd have to do a little bit more implementation
826  * to use those tests.
827  */
828 
829  printf (" (ending tests due to Type 3 tests seen - this is normal)\n");
830  break;
831  }
832  }
833  else if (_dbus_string_starts_with_c_str (&line, "D>") ||
834  _dbus_string_starts_with_c_str (&line, "<D"))
835  goto next_iteration;
836  else
837  {
838  DBusString test;
839  DBusString result;
840  DBusString next_line;
841  DBusString expected;
842  dbus_bool_t success;
843 
844  success = FALSE;
845 
846  if (!_dbus_string_init (&next_line))
847  _dbus_assert_not_reached ("no memory");
848 
849  if (!_dbus_string_init (&expected))
850  _dbus_assert_not_reached ("no memory");
851 
852  if (!_dbus_string_init (&test))
853  _dbus_assert_not_reached ("no memory");
854 
855  if (!_dbus_string_init (&result))
856  _dbus_assert_not_reached ("no memory");
857 
858  /* the "compact strings" are "^"-terminated not
859  * newline-terminated so readahead to find the
860  * "^"
861  */
862  while (!_dbus_string_find (&line, 0, "^", NULL) &&
863  _dbus_string_pop_line (&tests, &next_line))
864  {
865  if (!_dbus_string_append_byte (&line, ' ') ||
866  !_dbus_string_move (&next_line, 0, &line,
867  _dbus_string_get_length (&line)))
868  _dbus_assert_not_reached ("no memory");
869  }
870 
871  if (!decode_compact_string (&line, &test))
872  {
873  fprintf (stderr, "Failed to decode line %d as a compact string\n",
874  line_no);
875  goto failure;
876  }
877 
878  if (!_dbus_sha_compute (&test, &result))
879  _dbus_assert_not_reached ("no memory for SHA-1 result");
880 
881  if (!get_next_expected_result (&results, &expected))
882  {
883  fprintf (stderr, "Failed to read an expected result\n");
884  goto failure;
885  }
886 
887  if (!_dbus_string_equal (&result, &expected))
888  {
889  fprintf (stderr, " for line %d got hash %s expected %s\n",
890  line_no,
891  _dbus_string_get_const_data (&result),
892  _dbus_string_get_const_data (&expected));
893  goto failure;
894  }
895  else
896  {
897  success_count += 1;
898  }
899 
900  success = TRUE;
901 
902  failure:
903  _dbus_string_free (&test);
904  _dbus_string_free (&result);
905  _dbus_string_free (&next_line);
906  _dbus_string_free (&expected);
907 
908  if (!success)
909  goto out;
910  }
911  }
912 
913  retval = TRUE;
914 
915  printf ("Passed the %d SHA-1 tests in the test file\n",
916  success_count);
917 
918  out:
919  _dbus_string_free (&tests_file);
920  _dbus_string_free (&results_file);
921  _dbus_string_free (&tests);
922  _dbus_string_free (&results);
923  _dbus_string_free (&line);
924 
925  return retval;
926 }
927 
935 _dbus_sha_test (const char *test_data_dir)
936 {
937  unsigned char all_bytes[256];
938  int i;
939 
940  if (test_data_dir != NULL)
941  {
942  if (!process_test_data (test_data_dir))
943  return FALSE;
944  }
945  else
946  printf ("No test data dir\n");
947 
948  i = 0;
949  while (i < 256)
950  {
951  all_bytes[i] = i;
952  ++i;
953  }
954 
955  if (!check_sha_binary (all_bytes, 256,
956  "4916d6bdb7f78e6803698cab32d1586ea457dfc8"))
957  return FALSE;
958 
959 #define CHECK(input,expected) if (!check_sha_str (input, expected)) return FALSE
960 
961  CHECK ("", "da39a3ee5e6b4b0d3255bfef95601890afd80709");
962  CHECK ("a", "86f7e437faa5a7fce15d1ddcb9eaeaea377667b8");
963  CHECK ("abc", "a9993e364706816aba3e25717850c26c9cd0d89d");
964  CHECK ("message digest", "c12252ceda8be8994d5fa0290a47231c1d16aae3");
965  CHECK ("abcdefghijklmnopqrstuvwxyz", "32d10c7b8cf96570ca04ce37f2a19d84240d3a89");
966  CHECK ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
967  "761c457bf73b14d27e9e9265c46f4b4dda11f940");
968  CHECK ("12345678901234567890123456789012345678901234567890123456789012345678901234567890",
969  "50abf5706a150990a08b2c5ea40fa0e585554732");
970 
971  return TRUE;
972 }
973 
974 #endif /* DBUS_ENABLE_EMBEDDED_TESTS */
dbus_bool_t _dbus_sha_final(DBusSHAContext *context, DBusString *results)
SHA finalization.
Definition: dbus-sha.c:456
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:935
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_parse_int(const DBusString *str, int start, long *value_return, int *end_return)
Parses an integer contained in a DBusString.
Definition: dbus-sysdeps.c:437
unsigned int dbus_uint32_t
A 32-bit unsigned integer on all platforms.
const char * message
public error message field
Definition: dbus-errors.h:51
#define NULL
A null pointer, defined appropriately for C or C++.
dbus_uint32_t count_lo
64-bit bit count
Definition: dbus-sha.h:40
void _dbus_sha_init(DBusSHAContext *context)
Initializes the SHA context.
Definition: dbus-sha.c:420
dbus_bool_t _dbus_string_equal(const DBusString *a, const DBusString *b)
Tests two DBusString for equality.
Definition: dbus-string.c:2013
dbus_bool_t _dbus_string_hex_encode(const DBusString *source, int start, DBusString *dest, int insert_at)
Encodes a string in hex, the way MD5 and SHA-1 are usually encoded.
Definition: dbus-string.c:2259
dbus_bool_t _dbus_string_starts_with_c_str(const DBusString *a, const char *c_str)
Checks whether a string starts with the given C string.
Definition: dbus-string.c:2188
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
Definition: dbus-errors.h:62
void dbus_error_free(DBusError *error)
Frees an error that&#39;s been set (or just initialized), then reinitializes the error as in dbus_error_i...
Definition: dbus-errors.c:211
dbus_bool_t _dbus_file_get_contents(DBusString *str, const DBusString *filename, DBusError *error)
Appends the contents of the given file to the string, returning error code.
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
dbus_uint32_t data[16]
SHA data buffer.
Definition: dbus-sha.h:42
dbus_bool_t _dbus_string_find(const DBusString *str, int start, const char *substr, int *found)
Finds the given substring in the string, returning TRUE and filling in the byte index where the subst...
Definition: dbus-string.c:1604
dbus_uint32_t digest[5]
Message digest.
Definition: dbus-sha.h:39
Struct storing state of the SHA algorithm.
Definition: dbus-sha.h:37
dbus_bool_t _dbus_string_move(DBusString *source, int start, DBusString *dest, int insert_at)
Moves the end of one string into another string.
Definition: dbus-string.c:1259
dbus_uint32_t count_hi
No clue.
Definition: dbus-sha.h:41
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:190
void _dbus_string_skip_blank(const DBusString *str, int start, int *end)
Skips blanks from start, storing the first non-blank in *end (blank is space or tab).
Definition: dbus-string.c:1803
dbus_bool_t _dbus_string_pop_line(DBusString *source, DBusString *dest)
Assigns a newline-terminated or \r\n-terminated line from the front of the string to the given dest s...
Definition: dbus-string.c:1909
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
void _dbus_string_delete(DBusString *str, int start, int len)
Deletes a segment of a DBusString with length len starting at start.
Definition: dbus-string.c:1193
Object representing an exception.
Definition: dbus-errors.h:48
dbus_bool_t _dbus_string_append_byte(DBusString *str, unsigned char byte)
Appends a single byte to the string, returning FALSE if not enough memory.
Definition: dbus-string.c:1157
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
#define TRUE
Expands to "1".
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
void _dbus_sha_update(DBusSHAContext *context, const DBusString *data)
Feeds more data into an existing shasum computation.
Definition: dbus-sha.c:432
dbus_bool_t _dbus_string_append_len(DBusString *str, const char *buffer, int len)
Appends block of bytes with the given length to a DBusString.
Definition: dbus-string.c:1137
#define FALSE
Expands to "0".
dbus_bool_t _dbus_sha_compute(const DBusString *data, DBusString *ascii_output)
Computes the ASCII hex-encoded shasum of the given data and appends it to the output string...
Definition: dbus-sha.c:483
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:802
#define _DBUS_ZERO(object)
Sets all bits in an object to zero.
void _dbus_string_init_const_len(DBusString *str, const char *value, int len)
Initializes a constant string with a length.
Definition: dbus-string.c:210