MagickCore  7.0.3
cipher.c
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1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % CCCC IIIII PPPP H H EEEEE RRRR %
6 % C I P P H H E R R %
7 % C I PPPP HHHHH EEE RRRR %
8 % C I P H H E R R %
9 % CCCC IIIII P H H EEEEE R R %
10 % %
11 % %
12 % MagickCore Cipher Methods %
13 % %
14 % Software Design %
15 % Cristy %
16 % March 2003 %
17 % %
18 % %
19 % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
20 % dedicated to making software imaging solutions freely available. %
21 % %
22 % You may not use this file except in compliance with the License. You may %
23 % obtain a copy of the License at %
24 % %
25 % https://imagemagick.org/script/license.php %
26 % %
27 % Unless required by applicable law or agreed to in writing, software %
28 % distributed under the License is distributed on an "AS IS" BASIS, %
29 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
30 % See the License for the specific language governing permissions and %
31 % limitations under the License. %
32 % %
33 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
34 %
35 %
36 */
37 
38 /*
39  Include declarations.
40 */
41 #include "MagickCore/studio.h"
42 #include "MagickCore/cache.h"
43 #include "MagickCore/cipher.h"
44 #include "MagickCore/exception.h"
45 #include "MagickCore/exception-private.h"
46 #include "MagickCore/image.h"
47 #include "MagickCore/image-private.h"
48 #include "MagickCore/linked-list.h"
49 #include "MagickCore/list.h"
50 #include "MagickCore/memory_.h"
51 #include "MagickCore/memory-private.h"
52 #include "MagickCore/monitor.h"
53 #include "MagickCore/monitor-private.h"
54 #include "MagickCore/property.h"
55 #include "MagickCore/quantum-private.h"
56 #include "MagickCore/registry.h"
57 #include "MagickCore/semaphore.h"
58 #include "MagickCore/signature-private.h"
59 #include "MagickCore/splay-tree.h"
60 #include "MagickCore/statistic.h"
61 #include "MagickCore/string_.h"
62 
63 #if defined(MAGICKCORE_CIPHER_SUPPORT)
64 /*
65  Define declarations.
66 */
67 #define AESBlocksize 16
68 
69 /*
70  Typedef declarations.
71 */
72 typedef struct _AESInfo
73 {
74  StringInfo
75  *key;
76 
77  unsigned int
78  blocksize,
79  *encipher_key,
80  *decipher_key;
81 
82  ssize_t
83  rounds,
84  timestamp;
85 
86  size_t
87  signature;
88 } AESInfo;
89 
90 /*
91  Global declarations.
92 */
93 static unsigned char
94  InverseLog[256] =
95  {
96  1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248,
97  19, 53, 95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10,
98  30, 34, 102, 170, 229, 52, 92, 228, 55, 89, 235, 38, 106, 190,
99  217, 112, 144, 171, 230, 49, 83, 245, 4, 12, 20, 60, 68, 204,
100  79, 209, 104, 184, 211, 110, 178, 205, 76, 212, 103, 169, 224, 59,
101  77, 215, 98, 166, 241, 8, 24, 40, 120, 136, 131, 158, 185, 208,
102  107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154, 181, 196,
103  87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,
104  254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32,
105  96, 160, 251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86,
106  250, 21, 63, 65, 195, 94, 226, 61, 71, 201, 64, 192, 91, 237,
107  44, 116, 156, 191, 218, 117, 159, 186, 213, 100, 172, 239, 42, 126,
108  130, 157, 188, 223, 122, 142, 137, 128, 155, 182, 193, 88, 232, 35,
109  101, 175, 234, 37, 111, 177, 200, 67, 197, 84, 252, 31, 33, 99,
110  165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202, 69, 207,
111  74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14,
112  18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242,
113  13, 23, 57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180,
114  199, 82, 246, 1
115  },
116  Log[256] =
117  {
118  0, 0, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238,
119  223, 3, 100, 4, 224, 14, 52, 141, 129, 239, 76, 113, 8, 200,
120  248, 105, 28, 193, 125, 194, 29, 181, 249, 185, 39, 106, 77, 228,
121  166, 114, 154, 201, 9, 120, 101, 47, 138, 5, 33, 15, 225, 36,
122  18, 240, 130, 69, 53, 147, 218, 142, 150, 143, 219, 189, 54, 208,
123  206, 148, 19, 92, 210, 241, 64, 70, 131, 56, 102, 221, 253, 48,
124  191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16, 126, 110,
125  72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186,
126  43, 121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115,
127  167, 87, 175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213,
128  231, 230, 173, 232, 44, 215, 117, 122, 235, 22, 11, 245, 89, 203,
129  95, 176, 156, 169, 81, 160, 127, 12, 246, 111, 23, 196, 73, 236,
130  216, 67, 31, 45, 164, 118, 123, 183, 204, 187, 62, 90, 251, 96,
131  177, 134, 59, 82, 161, 108, 170, 85, 41, 157, 151, 178, 135, 144,
132  97, 190, 220, 252, 188, 149, 207, 205, 55, 63, 91, 209, 83, 57,
133  132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86, 242, 211, 171,
134  68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38, 119, 153,
135  227, 165, 103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140, 128,
136  192, 247, 112, 7,
137  },
138  SBox[256] =
139  {
140  99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215,
141  171, 118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175,
142  156, 164, 114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165,
143  229, 241, 113, 216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154,
144  7, 18, 128, 226, 235, 39, 178, 117, 9, 131, 44, 26, 27, 110,
145  90, 160, 82, 59, 214, 179, 41, 227, 47, 132, 83, 209, 0, 237,
146  32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207, 208, 239,
147  170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168,
148  81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255,
149  243, 210, 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61,
150  100, 93, 25, 115, 96, 129, 79, 220, 34, 42, 144, 136, 70, 238,
151  184, 20, 222, 94, 11, 219, 224, 50, 58, 10, 73, 6, 36, 92,
152  194, 211, 172, 98, 145, 149, 228, 121, 231, 200, 55, 109, 141, 213,
153  78, 169, 108, 86, 244, 234, 101, 122, 174, 8, 186, 120, 37, 46,
154  28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, 112, 62,
155  181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158,
156  225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85,
157  40, 223, 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15,
158  176, 84, 187, 22
159  };
160 
161 /*
162  Forward declarations.
163 */
164 static AESInfo
165  *DestroyAESInfo(AESInfo *);
166 
167 static void
168  EncipherAESBlock(AESInfo *,const unsigned char *,unsigned char *),
169  SetAESKey(AESInfo *,const StringInfo *);
170 
171 /*
172 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
173 % %
174 % %
175 % %
176 % A c q u i r e A E S I n f o %
177 % %
178 % %
179 % %
180 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
181 %
182 % AcquireAESInfo() allocate the AESInfo structure.
183 %
184 % The format of the AcquireAESInfo method is:
185 %
186 % AESInfo *AcquireAESInfo(void)
187 %
188 */
189 static AESInfo *AcquireAESInfo(void)
190 {
191  AESInfo
192  *aes_info;
193 
194  aes_info=(AESInfo *) AcquireCriticalMemory(sizeof(*aes_info));
195  (void) memset(aes_info,0,sizeof(*aes_info));
196  aes_info->blocksize=AESBlocksize;
197  aes_info->key=AcquireStringInfo(32);
198  aes_info->encipher_key=(unsigned int *) AcquireQuantumMemory(60UL,sizeof(
199  *aes_info->encipher_key));
200  aes_info->decipher_key=(unsigned int *) AcquireQuantumMemory(60UL,sizeof(
201  *aes_info->decipher_key));
202  if ((aes_info->key == (StringInfo *) NULL) ||
203  (aes_info->encipher_key == (unsigned int *) NULL) ||
204  (aes_info->decipher_key == (unsigned int *) NULL))
205  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
206  aes_info->timestamp=(ssize_t) time(0);
207  aes_info->signature=MagickCoreSignature;
208  return(aes_info);
209 }
210 
211 /*
212 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
213 % %
214 % %
215 % %
216 % D e s t r o y A E S I n f o %
217 % %
218 % %
219 % %
220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
221 %
222 % DestroyAESInfo() zeros memory associated with the AESInfo structure.
223 %
224 % The format of the DestroyAESInfo method is:
225 %
226 % AESInfo *DestroyAESInfo(AESInfo *aes_info)
227 %
228 % A description of each parameter follows:
229 %
230 % o aes_info: the cipher context.
231 %
232 */
233 static AESInfo *DestroyAESInfo(AESInfo *aes_info)
234 {
235  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
236  assert(aes_info != (AESInfo *) NULL);
237  assert(aes_info->signature == MagickCoreSignature);
238  if (aes_info->decipher_key != (unsigned int *) NULL)
239  aes_info->decipher_key=(unsigned int *) RelinquishMagickMemory(
240  aes_info->decipher_key);
241  if (aes_info->encipher_key != (unsigned int *) NULL)
242  aes_info->encipher_key=(unsigned int *) RelinquishMagickMemory(
243  aes_info->encipher_key);
244  if (aes_info->key != (StringInfo *) NULL)
245  aes_info->key=DestroyStringInfo(aes_info->key);
246  aes_info->signature=(~MagickCoreSignature);
247  aes_info=(AESInfo *) RelinquishMagickMemory(aes_info);
248  return(aes_info);
249 }
250 
251 /*
252 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
253 % %
254 % %
255 % %
256 % E n c i p h e r A E S B l o c k %
257 % %
258 % %
259 % %
260 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
261 %
262 % EncipherAESBlock() enciphers a single block of plaintext to produce a block
263 % of ciphertext.
264 %
265 % The format of the EncipherAESBlock method is:
266 %
267 % void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext,
268 % unsigned char *ciphertext)
269 %
270 % A description of each parameter follows:
271 %
272 % o aes_info: the cipher context.
273 %
274 % o plaintext: the plain text.
275 %
276 % o ciphertext: the cipher text.
277 %
278 */
279 
280 static inline void AddRoundKey(const unsigned int *ciphertext,
281  const unsigned int *key,unsigned int *plaintext)
282 {
283  register ssize_t
284  i;
285 
286  /*
287  Xor corresponding text input and round key input bytes.
288  */
289  for (i=0; i < 4; i++)
290  plaintext[i]=key[i] ^ ciphertext[i];
291 }
292 
293 static inline unsigned char ByteMultiply(const unsigned char alpha,
294  const unsigned char beta)
295 {
296  /*
297  Byte multiply two elements of GF(2^m) (mix columns and inverse mix columns).
298  */
299  if ((alpha == 0) || (beta == 0))
300  return(0);
301  return(InverseLog[(Log[alpha]+Log[beta]) % 0xff]);
302 }
303 
304 static inline unsigned int ByteSubTransform(unsigned int x,
305  unsigned char *s_box)
306 {
307  unsigned int
308  key;
309 
310  /*
311  Non-linear layer resists differential and linear cryptoanalysis attacks.
312  */
313  key=(s_box[x & 0xff]) | (s_box[(x >> 8) & 0xff] << 8) |
314  (s_box[(x >> 16) & 0xff] << 16) | (s_box[(x >> 24) & 0xff] << 24);
315  return(key);
316 }
317 
318 static void FinalizeRoundKey(const unsigned int *ciphertext,
319  const unsigned int *key,unsigned char *plaintext)
320 {
321  register unsigned char
322  *p;
323 
324  register unsigned int
325  i,
326  j;
327 
328  unsigned int
329  value;
330 
331  /*
332  The round key is XORed with the result of the mix-column transformation.
333  */
334  p=plaintext;
335  for (i=0; i < 4; i++)
336  {
337  value=ciphertext[i] ^ key[i];
338  for (j=0; j < 4; j++)
339  *p++=(unsigned char) ((value >> (8*j)) & 0xff);
340  }
341  /*
342  Reset registers.
343  */
344  value=0;
345 }
346 
347 static void InitializeRoundKey(const unsigned char *ciphertext,
348  const unsigned int *key,unsigned int *plaintext)
349 {
350  register const unsigned char
351  *p;
352 
353  register unsigned int
354  i,
355  j;
356 
357  unsigned int
358  value;
359 
360  p=ciphertext;
361  for (i=0; i < 4; i++)
362  {
363  value=0;
364  for (j=0; j < 4; j++)
365  value|=(*p++ << (8*j));
366  plaintext[i]=key[i] ^ value;
367  }
368  /*
369  Reset registers.
370  */
371  value=0;
372 }
373 
374 static inline unsigned int RotateLeft(const unsigned int x)
375 {
376  return(((x << 8) | ((x >> 24) & 0xff)));
377 }
378 
379 static void EncipherAESBlock(AESInfo *aes_info,const unsigned char *plaintext,
380  unsigned char *ciphertext)
381 {
382  register ssize_t
383  i,
384  j;
385 
386  static int
387  map[4][4] =
388  {
389  { 0, 1, 2, 3 },
390  { 1, 2, 3, 0 },
391  { 2, 3, 0, 1 },
392  { 3, 0, 1, 2 }
393  };
394 
395  static unsigned int
396  D[] =
397  {
398  0xa56363c6U, 0x847c7cf8U, 0x997777eeU, 0x8d7b7bf6U, 0x0df2f2ffU,
399  0xbd6b6bd6U, 0xb16f6fdeU, 0x54c5c591U, 0x50303060U, 0x03010102U,
400  0xa96767ceU, 0x7d2b2b56U, 0x19fefee7U, 0x62d7d7b5U, 0xe6abab4dU,
401  0x9a7676ecU, 0x45caca8fU, 0x9d82821fU, 0x40c9c989U, 0x877d7dfaU,
402  0x15fafaefU, 0xeb5959b2U, 0xc947478eU, 0x0bf0f0fbU, 0xecadad41U,
403  0x67d4d4b3U, 0xfda2a25fU, 0xeaafaf45U, 0xbf9c9c23U, 0xf7a4a453U,
404  0x967272e4U, 0x5bc0c09bU, 0xc2b7b775U, 0x1cfdfde1U, 0xae93933dU,
405  0x6a26264cU, 0x5a36366cU, 0x413f3f7eU, 0x02f7f7f5U, 0x4fcccc83U,
406  0x5c343468U, 0xf4a5a551U, 0x34e5e5d1U, 0x08f1f1f9U, 0x937171e2U,
407  0x73d8d8abU, 0x53313162U, 0x3f15152aU, 0x0c040408U, 0x52c7c795U,
408  0x65232346U, 0x5ec3c39dU, 0x28181830U, 0xa1969637U, 0x0f05050aU,
409  0xb59a9a2fU, 0x0907070eU, 0x36121224U, 0x9b80801bU, 0x3de2e2dfU,
410  0x26ebebcdU, 0x6927274eU, 0xcdb2b27fU, 0x9f7575eaU, 0x1b090912U,
411  0x9e83831dU, 0x742c2c58U, 0x2e1a1a34U, 0x2d1b1b36U, 0xb26e6edcU,
412  0xee5a5ab4U, 0xfba0a05bU, 0xf65252a4U, 0x4d3b3b76U, 0x61d6d6b7U,
413  0xceb3b37dU, 0x7b292952U, 0x3ee3e3ddU, 0x712f2f5eU, 0x97848413U,
414  0xf55353a6U, 0x68d1d1b9U, 0x00000000U, 0x2cededc1U, 0x60202040U,
415  0x1ffcfce3U, 0xc8b1b179U, 0xed5b5bb6U, 0xbe6a6ad4U, 0x46cbcb8dU,
416  0xd9bebe67U, 0x4b393972U, 0xde4a4a94U, 0xd44c4c98U, 0xe85858b0U,
417  0x4acfcf85U, 0x6bd0d0bbU, 0x2aefefc5U, 0xe5aaaa4fU, 0x16fbfbedU,
418  0xc5434386U, 0xd74d4d9aU, 0x55333366U, 0x94858511U, 0xcf45458aU,
419  0x10f9f9e9U, 0x06020204U, 0x817f7ffeU, 0xf05050a0U, 0x443c3c78U,
420  0xba9f9f25U, 0xe3a8a84bU, 0xf35151a2U, 0xfea3a35dU, 0xc0404080U,
421  0x8a8f8f05U, 0xad92923fU, 0xbc9d9d21U, 0x48383870U, 0x04f5f5f1U,
422  0xdfbcbc63U, 0xc1b6b677U, 0x75dadaafU, 0x63212142U, 0x30101020U,
423  0x1affffe5U, 0x0ef3f3fdU, 0x6dd2d2bfU, 0x4ccdcd81U, 0x140c0c18U,
424  0x35131326U, 0x2fececc3U, 0xe15f5fbeU, 0xa2979735U, 0xcc444488U,
425  0x3917172eU, 0x57c4c493U, 0xf2a7a755U, 0x827e7efcU, 0x473d3d7aU,
426  0xac6464c8U, 0xe75d5dbaU, 0x2b191932U, 0x957373e6U, 0xa06060c0U,
427  0x98818119U, 0xd14f4f9eU, 0x7fdcdca3U, 0x66222244U, 0x7e2a2a54U,
428  0xab90903bU, 0x8388880bU, 0xca46468cU, 0x29eeeec7U, 0xd3b8b86bU,
429  0x3c141428U, 0x79dedea7U, 0xe25e5ebcU, 0x1d0b0b16U, 0x76dbdbadU,
430  0x3be0e0dbU, 0x56323264U, 0x4e3a3a74U, 0x1e0a0a14U, 0xdb494992U,
431  0x0a06060cU, 0x6c242448U, 0xe45c5cb8U, 0x5dc2c29fU, 0x6ed3d3bdU,
432  0xefacac43U, 0xa66262c4U, 0xa8919139U, 0xa4959531U, 0x37e4e4d3U,
433  0x8b7979f2U, 0x32e7e7d5U, 0x43c8c88bU, 0x5937376eU, 0xb76d6ddaU,
434  0x8c8d8d01U, 0x64d5d5b1U, 0xd24e4e9cU, 0xe0a9a949U, 0xb46c6cd8U,
435  0xfa5656acU, 0x07f4f4f3U, 0x25eaeacfU, 0xaf6565caU, 0x8e7a7af4U,
436  0xe9aeae47U, 0x18080810U, 0xd5baba6fU, 0x887878f0U, 0x6f25254aU,
437  0x722e2e5cU, 0x241c1c38U, 0xf1a6a657U, 0xc7b4b473U, 0x51c6c697U,
438  0x23e8e8cbU, 0x7cdddda1U, 0x9c7474e8U, 0x211f1f3eU, 0xdd4b4b96U,
439  0xdcbdbd61U, 0x868b8b0dU, 0x858a8a0fU, 0x907070e0U, 0x423e3e7cU,
440  0xc4b5b571U, 0xaa6666ccU, 0xd8484890U, 0x05030306U, 0x01f6f6f7U,
441  0x120e0e1cU, 0xa36161c2U, 0x5f35356aU, 0xf95757aeU, 0xd0b9b969U,
442  0x91868617U, 0x58c1c199U, 0x271d1d3aU, 0xb99e9e27U, 0x38e1e1d9U,
443  0x13f8f8ebU, 0xb398982bU, 0x33111122U, 0xbb6969d2U, 0x70d9d9a9U,
444  0x898e8e07U, 0xa7949433U, 0xb69b9b2dU, 0x221e1e3cU, 0x92878715U,
445  0x20e9e9c9U, 0x49cece87U, 0xff5555aaU, 0x78282850U, 0x7adfdfa5U,
446  0x8f8c8c03U, 0xf8a1a159U, 0x80898909U, 0x170d0d1aU, 0xdabfbf65U,
447  0x31e6e6d7U, 0xc6424284U, 0xb86868d0U, 0xc3414182U, 0xb0999929U,
448  0x772d2d5aU, 0x110f0f1eU, 0xcbb0b07bU, 0xfc5454a8U, 0xd6bbbb6dU,
449  0x3a16162cU
450  };
451 
452  unsigned int
453  alpha,
454  key[4],
455  text[4];
456 
457  /*
458  Encipher one block.
459  */
460  (void) memset(text,0,sizeof(text));
461  InitializeRoundKey(plaintext,aes_info->encipher_key,text);
462  for (i=1; i < aes_info->rounds; i++)
463  {
464  /*
465  Linear mixing step: cause diffusion of the bits over multiple rounds.
466  */
467  for (j=0; j < 4; j++)
468  key[j]=D[text[j] & 0xff] ^
469  RotateLeft(D[(text[map[1][j]] >> 8) & 0xff] ^
470  RotateLeft(D[(text[map[2][j]] >> 16) & 0xff] ^
471  RotateLeft(D[(text[map[3][j]] >> 24) & 0xff])));
472  AddRoundKey(key,aes_info->encipher_key+4*i,text);
473  }
474  for (i=0; i < 4; i++)
475  {
476  alpha=(text[i] & 0x000000ff) | ((text[map[1][i]]) & 0x0000ff00) |
477  ((text[map[2][i]]) & 0x00ff0000) | ((text[map[3][i]]) & 0xff000000);
478  key[i]=ByteSubTransform(alpha,SBox);
479  }
480  FinalizeRoundKey(key,aes_info->encipher_key+4*aes_info->rounds,ciphertext);
481  /*
482  Reset registers.
483  */
484  alpha=0;
485  (void) memset(key,0,sizeof(key));
486  (void) memset(text,0,sizeof(text));
487 }
488 
489 /*
490 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
491 % %
492 % %
493 % %
494 % P a s s k e y D e c i p h e r I m a g e %
495 % %
496 % %
497 % %
498 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
499 %
500 % PasskeyDecipherImage() converts cipher pixels to plain pixels.
501 %
502 % The format of the PasskeyDecipherImage method is:
503 %
504 % MagickBooleanType PasskeyDecipherImage(Image *image,
505 % const StringInfo *passkey,ExceptionInfo *exception)
506 % MagickBooleanType DecipherImage(Image *image,const char *passphrase,
507 % ExceptionInfo *exception)
508 %
509 % A description of each parameter follows:
510 %
511 % o image: the image.
512 %
513 % o passphrase: decipher cipher pixels with this passphrase.
514 %
515 % o passkey: decrypt cipher pixels with this passkey.
516 %
517 % o exception: return any errors or warnings in this structure.
518 %
519 */
520 
521 static inline void IncrementCipherNonce(const size_t length,
522  unsigned char *nonce)
523 {
524  register ssize_t
525  i;
526 
527  for (i=(ssize_t) (length-1); i >= 0; i--)
528  {
529  nonce[i]++;
530  if (nonce[i] != 0)
531  return;
532  }
533  ThrowFatalException(ResourceLimitFatalError,"Sequence wrap error `%s'");
534 }
535 
536 MagickExport MagickBooleanType DecipherImage(Image *image,
537  const char *passphrase,ExceptionInfo *exception)
538 {
539  MagickBooleanType
540  status;
541 
542  StringInfo
543  *passkey;
544 
545  if (passphrase == (const char *) NULL)
546  return(MagickTrue);
547  passkey=StringToStringInfo(passphrase);
548  if (passkey == (StringInfo *) NULL)
549  return(MagickFalse);
550  status=PasskeyDecipherImage(image,passkey,exception);
551  passkey=DestroyStringInfo(passkey);
552  return(status);
553 }
554 
555 MagickExport MagickBooleanType PasskeyDecipherImage(Image *image,
556  const StringInfo *passkey,ExceptionInfo *exception)
557 {
558 #define DecipherImageTag "Decipher/Image "
559 
560  AESInfo
561  *aes_info;
562 
563  CacheView
564  *image_view;
565 
566  const unsigned char
567  *digest;
568 
569  MagickBooleanType
570  proceed;
571 
572  MagickSizeType
573  extent;
574 
575  QuantumInfo
576  *quantum_info;
577 
578  QuantumType
579  quantum_type;
580 
581  SignatureInfo
582  *signature_info;
583 
584  register unsigned char
585  *p;
586 
587  size_t
588  length;
589 
590  ssize_t
591  y;
592 
593  StringInfo
594  *key,
595  *nonce;
596 
597  unsigned char
598  input_block[AESBlocksize],
599  output_block[AESBlocksize],
600  *pixels;
601 
602  /*
603  Generate decipher key and nonce.
604  */
605  assert(image != (Image *) NULL);
606  assert(image->signature == MagickCoreSignature);
607  if (image->debug != MagickFalse)
608  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
609  assert(exception != (ExceptionInfo *) NULL);
610  assert(exception->signature == MagickCoreSignature);
611  if (passkey == (const StringInfo *) NULL)
612  return(MagickTrue);
613  aes_info=AcquireAESInfo();
614  key=CloneStringInfo(passkey);
615  if (key == (StringInfo *) NULL)
616  {
617  aes_info=DestroyAESInfo(aes_info);
618  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
619  image->filename);
620  }
621  nonce=SplitStringInfo(key,GetStringInfoLength(key)/2);
622  if (nonce == (StringInfo *) NULL)
623  {
624  key=DestroyStringInfo(key);
625  aes_info=DestroyAESInfo(aes_info);
626  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
627  image->filename);
628  }
629  SetAESKey(aes_info,key);
630  key=DestroyStringInfo(key);
631  signature_info=AcquireSignatureInfo();
632  UpdateSignature(signature_info,nonce);
633  extent=(MagickSizeType) image->columns*image->rows;
634  SetStringInfoLength(nonce,sizeof(extent));
635  SetStringInfoDatum(nonce,(const unsigned char *) &extent);
636  UpdateSignature(signature_info,nonce);
637  nonce=DestroyStringInfo(nonce);
638  FinalizeSignature(signature_info);
639  (void) memset(input_block,0,sizeof(input_block));
640  digest=GetStringInfoDatum(GetSignatureDigest(signature_info));
641  (void) memcpy(input_block,digest,MagickMin(AESBlocksize,
642  GetSignatureDigestsize(signature_info))*sizeof(*input_block));
643  signature_info=DestroySignatureInfo(signature_info);
644  /*
645  Convert cipher pixels to plain pixels.
646  */
647  quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image);
648  if (quantum_info == (QuantumInfo *) NULL)
649  {
650  aes_info=DestroyAESInfo(aes_info);
651  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
652  image->filename);
653  }
654  quantum_type=GetQuantumType(image,exception);
655  pixels=(unsigned char *) GetQuantumPixels(quantum_info);
656  image_view=AcquireAuthenticCacheView(image,exception);
657  for (y=0; y < (ssize_t) image->rows; y++)
658  {
659  register ssize_t
660  i,
661  x;
662 
663  register Quantum
664  *magick_restrict q;
665 
666  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
667  if (q == (Quantum *) NULL)
668  break;
669  length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type,
670  pixels,exception);
671  p=pixels;
672  for (x=0; x < (ssize_t) length; x+=AESBlocksize)
673  {
674  (void) memcpy(output_block,input_block,AESBlocksize*
675  sizeof(*output_block));
676  IncrementCipherNonce(AESBlocksize,input_block);
677  EncipherAESBlock(aes_info,output_block,output_block);
678  for (i=0; i < AESBlocksize; i++)
679  p[i]^=output_block[i];
680  p+=AESBlocksize;
681  }
682  (void) memcpy(output_block,input_block,AESBlocksize*
683  sizeof(*output_block));
684  EncipherAESBlock(aes_info,output_block,output_block);
685  for (i=0; x < (ssize_t) length; x++)
686  {
687  p[i]^=output_block[i];
688  i++;
689  }
690  (void) ImportQuantumPixels(image,image_view,quantum_info,quantum_type,
691  pixels,exception);
692  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
693  break;
694  proceed=SetImageProgress(image,DecipherImageTag,(MagickOffsetType) y,
695  image->rows);
696  if (proceed == MagickFalse)
697  break;
698  }
699  image_view=DestroyCacheView(image_view);
700  (void) DeleteImageProperty(image,"cipher:type");
701  (void) DeleteImageProperty(image,"cipher:mode");
702  (void) DeleteImageProperty(image,"cipher:nonce");
703  image->taint=MagickFalse;
704  /*
705  Free resources.
706  */
707  quantum_info=DestroyQuantumInfo(quantum_info);
708  aes_info=DestroyAESInfo(aes_info);
709  (void) memset(input_block,0,sizeof(input_block));
710  (void) memset(output_block,0,sizeof(output_block));
711  return(y == (ssize_t) image->rows ? MagickTrue : MagickFalse);
712 }
713 
714 /*
715 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
716 % %
717 % %
718 % %
719 % P a s s k e y E n c i p h e r I m a g e %
720 % %
721 % %
722 % %
723 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
724 %
725 % PasskeyEncipherImage() converts pixels to cipher-pixels.
726 %
727 % The format of the PasskeyEncipherImage method is:
728 %
729 % MagickBooleanType PasskeyEncipherImage(Image *image,
730 % const StringInfo *passkey,ExceptionInfo *exception)
731 % MagickBooleanType EncipherImage(Image *image,const char *passphrase,
732 % ExceptionInfo *exception)
733 %
734 % A description of each parameter follows:
735 %
736 % o image: the image.
737 %
738 % o passphrase: encipher pixels with this passphrase.
739 %
740 % o passkey: decrypt cipher pixels with this passkey.
741 %
742 % o exception: return any errors or warnings in this structure.
743 %
744 */
745 
746 MagickExport MagickBooleanType EncipherImage(Image *image,
747  const char *passphrase,ExceptionInfo *exception)
748 {
749  MagickBooleanType
750  status;
751 
752  StringInfo
753  *passkey;
754 
755  if (passphrase == (const char *) NULL)
756  return(MagickTrue);
757  passkey=StringToStringInfo(passphrase);
758  if (passkey == (StringInfo *) NULL)
759  return(MagickFalse);
760  status=PasskeyEncipherImage(image,passkey,exception);
761  passkey=DestroyStringInfo(passkey);
762  return(status);
763 }
764 
765 MagickExport MagickBooleanType PasskeyEncipherImage(Image *image,
766  const StringInfo *passkey,ExceptionInfo *exception)
767 {
768 #define EncipherImageTag "Encipher/Image "
769 
770  AESInfo
771  *aes_info;
772 
773  CacheView
774  *image_view;
775 
776  char
777  *signature;
778 
779  const unsigned char
780  *digest;
781 
782  MagickBooleanType
783  proceed;
784 
785  MagickSizeType
786  extent;
787 
788  QuantumInfo
789  *quantum_info;
790 
791  QuantumType
792  quantum_type;
793 
794  register unsigned char
795  *p;
796 
797  SignatureInfo
798  *signature_info;
799 
800  size_t
801  length;
802 
803  ssize_t
804  y;
805 
806  StringInfo
807  *key,
808  *nonce;
809 
810  unsigned char
811  input_block[AESBlocksize],
812  output_block[AESBlocksize],
813  *pixels;
814 
815  /*
816  Generate encipher key and nonce.
817  */
818  assert(image != (Image *) NULL);
819  assert(image->signature == MagickCoreSignature);
820  if (image->debug != MagickFalse)
821  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
822  assert(exception != (ExceptionInfo *) NULL);
823  assert(exception->signature == MagickCoreSignature);
824  if (passkey == (const StringInfo *) NULL)
825  return(MagickTrue);
826  if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
827  return(MagickFalse);
828  aes_info=AcquireAESInfo();
829  key=CloneStringInfo(passkey);
830  if (key == (StringInfo *) NULL)
831  {
832  aes_info=DestroyAESInfo(aes_info);
833  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
834  image->filename);
835  }
836  nonce=SplitStringInfo(key,GetStringInfoLength(key)/2);
837  if (nonce == (StringInfo *) NULL)
838  {
839  key=DestroyStringInfo(key);
840  aes_info=DestroyAESInfo(aes_info);
841  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
842  image->filename);
843  }
844  SetAESKey(aes_info,key);
845  key=DestroyStringInfo(key);
846  signature_info=AcquireSignatureInfo();
847  UpdateSignature(signature_info,nonce);
848  extent=(MagickSizeType) image->columns*image->rows;
849  SetStringInfoLength(nonce,sizeof(extent));
850  SetStringInfoDatum(nonce,(const unsigned char *) &extent);
851  UpdateSignature(signature_info,nonce);
852  nonce=DestroyStringInfo(nonce);
853  FinalizeSignature(signature_info);
854  signature=StringInfoToHexString(GetSignatureDigest(signature_info));
855  (void) SetImageProperty(image,"cipher:type","AES",exception);
856  (void) SetImageProperty(image,"cipher:mode","CTR",exception);
857  (void) SetImageProperty(image,"cipher:nonce",signature,exception);
858  signature=DestroyString(signature);
859  (void) memset(input_block,0,sizeof(input_block));
860  digest=GetStringInfoDatum(GetSignatureDigest(signature_info));
861  (void) memcpy(input_block,digest,MagickMin(AESBlocksize,
862  GetSignatureDigestsize(signature_info))*sizeof(*input_block));
863  signature_info=DestroySignatureInfo(signature_info);
864  /*
865  Convert plain pixels to cipher pixels.
866  */
867  quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image);
868  if (quantum_info == (QuantumInfo *) NULL)
869  {
870  aes_info=DestroyAESInfo(aes_info);
871  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
872  image->filename);
873  }
874  quantum_type=GetQuantumType(image,exception);
875  pixels=(unsigned char *) GetQuantumPixels(quantum_info);
876  image_view=AcquireAuthenticCacheView(image,exception);
877  for (y=0; y < (ssize_t) image->rows; y++)
878  {
879  register ssize_t
880  i,
881  x;
882 
883  register Quantum
884  *magick_restrict q;
885 
886  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
887  if (q == (Quantum *) NULL)
888  break;
889  length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type,
890  pixels,exception);
891  p=pixels;
892  for (x=0; x < (ssize_t) length; x+=AESBlocksize)
893  {
894  (void) memcpy(output_block,input_block,AESBlocksize*
895  sizeof(*output_block));
896  IncrementCipherNonce(AESBlocksize,input_block);
897  EncipherAESBlock(aes_info,output_block,output_block);
898  for (i=0; i < AESBlocksize; i++)
899  p[i]^=output_block[i];
900  p+=AESBlocksize;
901  }
902  (void) memcpy(output_block,input_block,AESBlocksize*
903  sizeof(*output_block));
904  EncipherAESBlock(aes_info,output_block,output_block);
905  for (i=0; x < (ssize_t) length; x++)
906  {
907  p[i]^=output_block[i];
908  i++;
909  }
910  (void) ImportQuantumPixels(image,image_view,quantum_info,quantum_type,
911  pixels,exception);
912  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
913  break;
914  proceed=SetImageProgress(image,EncipherImageTag,(MagickOffsetType) y,
915  image->rows);
916  if (proceed == MagickFalse)
917  break;
918  }
919  image_view=DestroyCacheView(image_view);
920  image->taint=MagickFalse;
921  /*
922  Free resources.
923  */
924  quantum_info=DestroyQuantumInfo(quantum_info);
925  aes_info=DestroyAESInfo(aes_info);
926  (void) memset(input_block,0,sizeof(input_block));
927  (void) memset(output_block,0,sizeof(output_block));
928  return(y == (ssize_t) image->rows ? MagickTrue : MagickFalse);
929 }
930 
931 /*
932 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
933 % %
934 % %
935 % %
936 % S e t A E S K e y %
937 % %
938 % %
939 % %
940 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
941 %
942 % SetAESKey() sets the key for the AES cipher. The key length is specified
943 % in bits. Valid values are 128, 192, or 256 requiring a key buffer length
944 % in bytes of 16, 24, and 32 respectively.
945 %
946 % The format of the SetAESKey method is:
947 %
948 % SetAESKey(AESInfo *aes_info,const StringInfo *key)
949 %
950 % A description of each parameter follows:
951 %
952 % o aes_info: the cipher context.
953 %
954 % o key: the key.
955 %
956 */
957 
958 static inline void InverseAddRoundKey(const unsigned int *alpha,
959  unsigned int *beta)
960 {
961  register unsigned int
962  i,
963  j;
964 
965  for (i=0; i < 4; i++)
966  {
967  beta[i]=0;
968  for (j=0; j < 4; j++)
969  beta[i]|=(ByteMultiply(0xe,(alpha[i] >> (8*j)) & 0xff) ^
970  ByteMultiply(0xb,(alpha[i] >> (8*((j+1) % 4))) & 0xff) ^
971  ByteMultiply(0xd,(alpha[i] >> (8*((j+2) % 4))) & 0xff) ^
972  ByteMultiply(0x9,(alpha[i] >> (8*((j+3) % 4))) & 0xff)) << (8*j);
973  }
974 }
975 
976 static inline unsigned int XTime(unsigned char alpha)
977 {
978  unsigned char
979  beta;
980 
981  beta=(unsigned char) ((alpha & 0x80) != 0 ? 0x1b : 0);
982  alpha<<=1;
983  alpha^=beta;
984  return(alpha);
985 }
986 
987 static inline unsigned int RotateRight(const unsigned int x)
988 {
989  return((x >> 8) | ((x & 0xff) << 24));
990 }
991 
992 static void SetAESKey(AESInfo *aes_info,const StringInfo *key)
993 {
994  register ssize_t
995  i;
996 
997  ssize_t
998  bytes,
999  n;
1000 
1001  unsigned char
1002  *datum;
1003 
1004  unsigned int
1005  alpha,
1006  beta;
1007 
1008  /*
1009  Determine the number of rounds based on the number of bits in key.
1010  */
1011  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
1012  assert(aes_info != (AESInfo *) NULL);
1013  assert(aes_info->signature == MagickCoreSignature);
1014  assert(key != (StringInfo *) NULL);
1015  n=4;
1016  aes_info->rounds=10;
1017  if ((8*GetStringInfoLength(key)) >= 256)
1018  {
1019  n=8;
1020  aes_info->rounds=14;
1021  }
1022  else
1023  if ((8*GetStringInfoLength(key)) >= 192)
1024  {
1025  n=6;
1026  aes_info->rounds=12;
1027  }
1028  /*
1029  Generate crypt key.
1030  */
1031  datum=GetStringInfoDatum(aes_info->key);
1032  (void) memset(datum,0,GetStringInfoLength(aes_info->key));
1033  (void) memcpy(datum,GetStringInfoDatum(key),MagickMin(
1034  GetStringInfoLength(key),GetStringInfoLength(aes_info->key)));
1035  for (i=0; i < n; i++)
1036  aes_info->encipher_key[i]=datum[4*i] | (datum[4*i+1] << 8) |
1037  (datum[4*i+2] << 16) | (datum[4*i+3] << 24);
1038  beta=1;
1039  bytes=(AESBlocksize/4)*(aes_info->rounds+1);
1040  for (i=n; i < bytes; i++)
1041  {
1042  alpha=aes_info->encipher_key[i-1];
1043  if ((i % n) == 0)
1044  {
1045  alpha=ByteSubTransform(RotateRight(alpha),SBox) ^ beta;
1046  beta=XTime((unsigned char) (beta & 0xff));
1047  }
1048  else
1049  if ((n > 6) && ((i % n) == 4))
1050  alpha=ByteSubTransform(alpha,SBox);
1051  aes_info->encipher_key[i]=aes_info->encipher_key[i-n] ^ alpha;
1052  }
1053  /*
1054  Generate deciper key (in reverse order).
1055  */
1056  for (i=0; i < 4; i++)
1057  {
1058  aes_info->decipher_key[i]=aes_info->encipher_key[i];
1059  aes_info->decipher_key[bytes-4+i]=aes_info->encipher_key[bytes-4+i];
1060  }
1061  for (i=4; i < (bytes-4); i+=4)
1062  InverseAddRoundKey(aes_info->encipher_key+i,aes_info->decipher_key+i);
1063  /*
1064  Reset registers.
1065  */
1066  datum=GetStringInfoDatum(aes_info->key);
1067  (void) memset(datum,0,GetStringInfoLength(aes_info->key));
1068  alpha=0;
1069  beta=0;
1070 }
1071 #else
1072 
1073 /*
1074 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1075 % %
1076 % %
1077 % %
1078 % P a s s k e y D e c i p h e r I m a g e %
1079 % %
1080 % %
1081 % %
1082 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1083 %
1084 % PasskeyDecipherImage() converts cipher pixels to plain pixels.
1085 %
1086 % The format of the PasskeyDecipherImage method is:
1087 %
1088 % MagickBooleanType PasskeyDecipherImage(Image *image,
1089 % const StringInfo *passkey,ExceptionInfo *exception)
1090 % MagickBooleanType DecipherImage(Image *image,const char *passphrase,
1091 % ExceptionInfo *exception)
1092 %
1093 % A description of each parameter follows:
1094 %
1095 % o image: the image.
1096 %
1097 % o passphrase: decipher cipher pixels with this passphrase.
1098 %
1099 % o passkey: decrypt cipher pixels with this passkey.
1100 %
1101 % o exception: return any errors or warnings in this structure.
1102 %
1103 */
1104 
1105 MagickExport MagickBooleanType DecipherImage(Image *image,
1106  const char *passphrase,ExceptionInfo *exception)
1107 {
1108  assert(image != (Image *) NULL);
1109  assert(image->signature == MagickCoreSignature);
1110  if (image->debug != MagickFalse)
1111  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1112  assert(exception != (ExceptionInfo *) NULL);
1113  assert(exception->signature == MagickCoreSignature);
1114  (void) passphrase;
1115  ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename);
1116 }
1117 
1118 MagickExport MagickBooleanType PasskeyDecipherImage(Image *image,
1119  const StringInfo *passkey,ExceptionInfo *exception)
1120 {
1121  assert(image != (Image *) NULL);
1122  assert(image->signature == MagickCoreSignature);
1123  if (image->debug != MagickFalse)
1124  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1125  assert(exception != (ExceptionInfo *) NULL);
1126  assert(exception->signature == MagickCoreSignature);
1127  (void) passkey;
1128  ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename);
1129 }
1130 
1131 /*
1132 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1133 % %
1134 % %
1135 % %
1136 % P a s s k e y E n c i p h e r I m a g e %
1137 % %
1138 % %
1139 % %
1140 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1141 %
1142 % PasskeyEncipherImage() converts pixels to cipher-pixels.
1143 %
1144 % The format of the PasskeyEncipherImage method is:
1145 %
1146 % MagickBooleanType PasskeyEncipherImage(Image *image,
1147 % const StringInfo *passkey,ExceptionInfo *exception)
1148 % MagickBooleanType EncipherImage(Image *image,const char *passphrase,
1149 % ExceptionInfo *exception)
1150 %
1151 % A description of each parameter follows:
1152 %
1153 % o passphrase: decipher cipher pixels with this passphrase.
1154 %
1155 % o passkey: decrypt cipher pixels with this passkey.
1156 %
1157 % o exception: return any errors or warnings in this structure.
1158 %
1159 */
1160 
1161 MagickExport MagickBooleanType EncipherImage(Image *image,
1162  const char *passphrase,ExceptionInfo *exception)
1163 {
1164  assert(image != (Image *) NULL);
1165  assert(image->signature == MagickCoreSignature);
1166  if (image->debug != MagickFalse)
1167  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1168  assert(exception != (ExceptionInfo *) NULL);
1169  assert(exception->signature == MagickCoreSignature);
1170  (void) passphrase;
1171  ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename);
1172 }
1173 
1174 MagickExport MagickBooleanType PasskeyEncipherImage(Image *image,
1175  const StringInfo *passkey,ExceptionInfo *exception)
1176 {
1177  assert(image != (Image *) NULL);
1178  assert(image->signature == MagickCoreSignature);
1179  if (image->debug != MagickFalse)
1180  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1181  assert(exception != (ExceptionInfo *) NULL);
1182  assert(exception->signature == MagickCoreSignature);
1183  (void) passkey;
1184  ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename);
1185 }
1186 #endif
_Image::rows
size_t rows
Definition: image.h:172
magick_restrict
#define magick_restrict
Definition: MagickCore.h:41
DestroyCacheView
MagickExport CacheView * DestroyCacheView(CacheView *cache_view)
Definition: cache-view.c:252
StringToStringInfo
MagickExport StringInfo * StringToStringInfo(const char *string)
Definition: string.c:2475
_SignatureInfo
Definition: signature.c:66
ThrowFatalException
#define ThrowFatalException(severity, tag)
Definition: exception-private.h:35
RotateRight
#define RotateRight(x, n)
_ExceptionInfo::signature
size_t signature
Definition: exception.h:123
AcquireSignatureInfo
MagickPrivate SignatureInfo * AcquireSignatureInfo(void)
_ExceptionInfo
Definition: exception.h:101
_Image::taint
MagickBooleanType taint
Definition: image.h:169
_ImageInfo
Definition: image.h:375
DecipherImage
MagickExport MagickBooleanType DecipherImage(Image *image, const char *passphrase, ExceptionInfo *exception)
Definition: cipher.c:1105
AcquireCriticalMemory
static void * AcquireCriticalMemory(const size_t size)
Definition: memory-private.h:56
_CacheView
Definition: cache-view.c:65
ThrowBinaryException
#define ThrowBinaryException(severity, tag, context)
Definition: exception-private.h:29
TraceEvent
Definition: log.h:52
MagickOffsetType
ssize_t MagickOffsetType
Definition: magick-type.h:129
_Image
Definition: image.h:151
_StringInfo
Definition: string_.h:27
string_.h
MagickCoreSignature
#define MagickCoreSignature
Definition: method-attribute.h:86
FinalizeSignature
MagickPrivate void FinalizeSignature(SignatureInfo *)
GetCacheViewAuthenticPixels
MagickExport Quantum * GetCacheViewAuthenticPixels(CacheView *cache_view, const ssize_t x, const ssize_t y, const size_t columns, const size_t rows, ExceptionInfo *exception)
Definition: cache-view.c:299
DestroySignatureInfo
MagickPrivate SignatureInfo * DestroySignatureInfo(SignatureInfo *)
Definition: signature.c:171
GetStringInfoDatum
MagickExport unsigned char * GetStringInfoDatum(const StringInfo *string_info)
Definition: string.c:1215
MagickBooleanType
MagickBooleanType
Definition: magick-type.h:158
ImportQuantumPixels
MagickExport size_t ImportQuantumPixels(const Image *image, CacheView *image_view, QuantumInfo *quantum_info, const QuantumType quantum_type, const unsigned char *magick_restrict pixels, ExceptionInfo *exception)
Definition: quantum-import.c:4093
PasskeyEncipherImage
MagickExport MagickBooleanType PasskeyEncipherImage(Image *image, const StringInfo *passkey, ExceptionInfo *exception)
Definition: cipher.c:1174
DestroyStringInfo
MagickExport StringInfo * DestroyStringInfo(StringInfo *string_info)
Definition: string.c:850
AcquireQuantumMemory
MagickExport void * AcquireQuantumMemory(const size_t count, const size_t quantum)
Definition: memory.c:543
SetImageProperty
MagickExport MagickBooleanType SetImageProperty(Image *image, const char *property, const char *value, ExceptionInfo *exception)
Definition: property.c:4113
PasskeyDecipherImage
MagickExport MagickBooleanType PasskeyDecipherImage(Image *image, const StringInfo *passkey, ExceptionInfo *exception)
Definition: cipher.c:1118
MagickSizeType
size_t MagickSizeType
Definition: magick-type.h:130
memory_.h
LogMagickEvent
MagickExport MagickBooleanType LogMagickEvent(const LogEventType type, const char *module, const char *function, const size_t line, const char *format,...)
Definition: log.c:1413
_Image::signature
size_t signature
Definition: image.h:354
_Image::columns
size_t columns
Definition: image.h:172
ExportQuantumPixels
MagickExport size_t ExportQuantumPixels(const Image *image, CacheView *image_view, QuantumInfo *quantum_info, const QuantumType quantum_type, unsigned char *magick_restrict pixels, ExceptionInfo *exception)
Definition: quantum-export.c:3867
GetQuantumPixels
MagickExport unsigned char * GetQuantumPixels(const QuantumInfo *quantum_info)
Definition: quantum.c:489
SetImageStorageClass
MagickExport MagickBooleanType SetImageStorageClass(Image *image, const ClassType storage_class, ExceptionInfo *exception)
Definition: image.c:2615
AcquireStringInfo
MagickExport StringInfo * AcquireStringInfo(const size_t length)
Definition: string.c:187
UpdateSignature
MagickPrivate void UpdateSignature(SignatureInfo *, const StringInfo *)
Definition: signature.c:766
_QuantumInfo
Definition: quantum-private.h:45
_Image::filename
char filename[MagickPathExtent]
Definition: image.h:319
GetMagickModule
#define GetMagickModule()
Definition: log.h:28
EncipherImage
MagickExport MagickBooleanType EncipherImage(Image *image, const char *passphrase, ExceptionInfo *exception)
Definition: cipher.c:1161
Quantum
unsigned short Quantum
Definition: magick-type.h:82
SetStringInfoLength
MagickExport void SetStringInfoLength(StringInfo *string_info, const size_t length)
Definition: string.c:1745
DestroyString
MagickExport char * DestroyString(char *string)
Definition: string.c:823
DeleteImageProperty
MagickExport MagickBooleanType DeleteImageProperty(Image *image, const char *property)
Definition: property.c:279
MagickMin
#define MagickMin(x, y)
Definition: image-private.h:27
QuantumType
QuantumType
Definition: quantum.h:50
RelinquishMagickMemory
MagickExport void * RelinquishMagickMemory(void *memory)
Definition: memory.c:1069
GetSignatureDigest
MagickPrivate const StringInfo * GetSignatureDigest(const SignatureInfo *)
Definition: signature.c:327
MagickExport
#define MagickExport
Definition: method-attribute.h:80
SyncCacheViewAuthenticPixels
MagickExport MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *magick_restrict cache_view, ExceptionInfo *exception)
Definition: cache-view.c:1100
SplitStringInfo
MagickExport StringInfo * SplitStringInfo(StringInfo *string_info, const size_t offset)
Definition: string.c:1851
AcquireAuthenticCacheView
MagickExport CacheView * AcquireAuthenticCacheView(const Image *image, ExceptionInfo *exception)
Definition: cache-view.c:112
StringInfoToHexString
MagickExport char * StringInfoToHexString(const StringInfo *string_info)
Definition: string.c:1933
GetSignatureDigestsize
MagickPrivate unsigned int GetSignatureDigestsize(const SignatureInfo *)
Definition: signature.c:358
GetStringInfoLength
MagickExport size_t GetStringInfoLength(const StringInfo *string_info)
Definition: string.c:1244
AcquireQuantumInfo
MagickExport QuantumInfo * AcquireQuantumInfo(const ImageInfo *image_info, Image *image)
Definition: quantum.c:110
CloneStringInfo
MagickExport StringInfo * CloneStringInfo(const StringInfo *string_info)
Definition: string.c:338
SetImageProgress
MagickExport MagickBooleanType SetImageProgress(const Image *image, const char *tag, const MagickOffsetType offset, const MagickSizeType extent)
Definition: monitor.c:136
SetStringInfoDatum
MagickExport void SetStringInfoDatum(StringInfo *string_info, const unsigned char *source)
Definition: string.c:1712
DestroyQuantumInfo
MagickExport QuantumInfo * DestroyQuantumInfo(QuantumInfo *quantum_info)
Definition: quantum.c:213
_Image::debug
MagickBooleanType debug
Definition: image.h:334
GetQuantumType
MagickExport QuantumType GetQuantumType(Image *image, ExceptionInfo *exception)
Definition: quantum.c:523