| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % CCCC IIIII PPPP H H EEEEE RRRR % |
| % C I P P H H E R R % |
| % C I PPPP HHHHH EEE RRRR % |
| % C I P H H E R R % |
| % CCCC IIIII P H H EEEEE R R % |
| % % |
| % % |
| % MagickCore Cipher Methods % |
| % % |
| % Software Design % |
| % Cristy % |
| % March 2003 % |
| % % |
| % % |
| % Copyright 1999-2017 ImageMagick Studio LLC, a non-profit organization % |
| % dedicated to making software imaging solutions freely available. % |
| % % |
| % You may not use this file except in compliance with the License. You may % |
| % obtain a copy of the License at % |
| % % |
| % https://www.imagemagick.org/script/license.php % |
| % % |
| % Unless required by applicable law or agreed to in writing, software % |
| % distributed under the License is distributed on an "AS IS" BASIS, % |
| % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| % See the License for the specific language governing permissions and % |
| % limitations under the License. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| */ |
| |
| /* |
| Include declarations. |
| */ |
| #include "MagickCore/studio.h" |
| #include "MagickCore/cache.h" |
| #include "MagickCore/cipher.h" |
| #include "MagickCore/exception.h" |
| #include "MagickCore/exception-private.h" |
| #include "MagickCore/image.h" |
| #include "MagickCore/image-private.h" |
| #include "MagickCore/linked-list.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/memory_.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/property.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/registry.h" |
| #include "MagickCore/semaphore.h" |
| #include "MagickCore/signature-private.h" |
| #include "MagickCore/splay-tree.h" |
| #include "MagickCore/statistic.h" |
| #include "MagickCore/string_.h" |
| |
| #if defined(MAGICKCORE_CIPHER_SUPPORT) |
| /* |
| Define declarations. |
| */ |
| #define AESBlocksize 16 |
| |
| /* |
| Typedef declarations. |
| */ |
| typedef struct _AESInfo |
| { |
| StringInfo |
| *key; |
| |
| unsigned int |
| blocksize, |
| *encipher_key, |
| *decipher_key; |
| |
| ssize_t |
| rounds, |
| timestamp; |
| |
| size_t |
| signature; |
| } AESInfo; |
| |
| /* |
| Global declarations. |
| */ |
| static unsigned char |
| InverseLog[256] = |
| { |
| 1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, |
| 19, 53, 95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, |
| 30, 34, 102, 170, 229, 52, 92, 228, 55, 89, 235, 38, 106, 190, |
| 217, 112, 144, 171, 230, 49, 83, 245, 4, 12, 20, 60, 68, 204, |
| 79, 209, 104, 184, 211, 110, 178, 205, 76, 212, 103, 169, 224, 59, |
| 77, 215, 98, 166, 241, 8, 24, 40, 120, 136, 131, 158, 185, 208, |
| 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154, 181, 196, |
| 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163, |
| 254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, |
| 96, 160, 251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, |
| 250, 21, 63, 65, 195, 94, 226, 61, 71, 201, 64, 192, 91, 237, |
| 44, 116, 156, 191, 218, 117, 159, 186, 213, 100, 172, 239, 42, 126, |
| 130, 157, 188, 223, 122, 142, 137, 128, 155, 182, 193, 88, 232, 35, |
| 101, 175, 234, 37, 111, 177, 200, 67, 197, 84, 252, 31, 33, 99, |
| 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202, 69, 207, |
| 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14, |
| 18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, |
| 13, 23, 57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, |
| 199, 82, 246, 1 |
| }, |
| Log[256] = |
| { |
| 0, 0, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238, |
| 223, 3, 100, 4, 224, 14, 52, 141, 129, 239, 76, 113, 8, 200, |
| 248, 105, 28, 193, 125, 194, 29, 181, 249, 185, 39, 106, 77, 228, |
| 166, 114, 154, 201, 9, 120, 101, 47, 138, 5, 33, 15, 225, 36, |
| 18, 240, 130, 69, 53, 147, 218, 142, 150, 143, 219, 189, 54, 208, |
| 206, 148, 19, 92, 210, 241, 64, 70, 131, 56, 102, 221, 253, 48, |
| 191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16, 126, 110, |
| 72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186, |
| 43, 121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115, |
| 167, 87, 175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213, |
| 231, 230, 173, 232, 44, 215, 117, 122, 235, 22, 11, 245, 89, 203, |
| 95, 176, 156, 169, 81, 160, 127, 12, 246, 111, 23, 196, 73, 236, |
| 216, 67, 31, 45, 164, 118, 123, 183, 204, 187, 62, 90, 251, 96, |
| 177, 134, 59, 82, 161, 108, 170, 85, 41, 157, 151, 178, 135, 144, |
| 97, 190, 220, 252, 188, 149, 207, 205, 55, 63, 91, 209, 83, 57, |
| 132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86, 242, 211, 171, |
| 68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38, 119, 153, |
| 227, 165, 103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140, 128, |
| 192, 247, 112, 7, |
| }, |
| SBox[256] = |
| { |
| 99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, |
| 171, 118, 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, |
| 156, 164, 114, 192, 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, |
| 229, 241, 113, 216, 49, 21, 4, 199, 35, 195, 24, 150, 5, 154, |
| 7, 18, 128, 226, 235, 39, 178, 117, 9, 131, 44, 26, 27, 110, |
| 90, 160, 82, 59, 214, 179, 41, 227, 47, 132, 83, 209, 0, 237, |
| 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207, 208, 239, |
| 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168, |
| 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, |
| 243, 210, 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, |
| 100, 93, 25, 115, 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, |
| 184, 20, 222, 94, 11, 219, 224, 50, 58, 10, 73, 6, 36, 92, |
| 194, 211, 172, 98, 145, 149, 228, 121, 231, 200, 55, 109, 141, 213, |
| 78, 169, 108, 86, 244, 234, 101, 122, 174, 8, 186, 120, 37, 46, |
| 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, 112, 62, |
| 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158, |
| 225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, |
| 40, 223, 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, |
| 176, 84, 187, 22 |
| }; |
| |
| /* |
| Forward declarations. |
| */ |
| static AESInfo |
| *DestroyAESInfo(AESInfo *); |
| |
| static void |
| EncipherAESBlock(AESInfo *,const unsigned char *,unsigned char *), |
| SetAESKey(AESInfo *,const StringInfo *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % A c q u i r e A E S I n f o % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % AcquireAESInfo() allocate the AESInfo structure. |
| % |
| % The format of the AcquireAESInfo method is: |
| % |
| % AESInfo *AcquireAESInfo(void) |
| % |
| */ |
| static AESInfo *AcquireAESInfo(void) |
| { |
| AESInfo |
| *aes_info; |
| |
| aes_info=(AESInfo *) AcquireMagickMemory(sizeof(*aes_info)); |
| if (aes_info == (AESInfo *) NULL) |
| ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed"); |
| (void) ResetMagickMemory(aes_info,0,sizeof(*aes_info)); |
| aes_info->blocksize=AESBlocksize; |
| aes_info->key=AcquireStringInfo(32); |
| aes_info->encipher_key=(unsigned int *) AcquireQuantumMemory(60UL,sizeof( |
| *aes_info->encipher_key)); |
| aes_info->decipher_key=(unsigned int *) AcquireQuantumMemory(60UL,sizeof( |
| *aes_info->decipher_key)); |
| if ((aes_info->key == (StringInfo *) NULL) || |
| (aes_info->encipher_key == (unsigned int *) NULL) || |
| (aes_info->decipher_key == (unsigned int *) NULL)) |
| ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed"); |
| aes_info->timestamp=(ssize_t) time(0); |
| aes_info->signature=MagickCoreSignature; |
| return(aes_info); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % D e s t r o y A E S I n f o % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % DestroyAESInfo() zeros memory associated with the AESInfo structure. |
| % |
| % The format of the DestroyAESInfo method is: |
| % |
| % AESInfo *DestroyAESInfo(AESInfo *aes_info) |
| % |
| % A description of each parameter follows: |
| % |
| % o aes_info: the cipher context. |
| % |
| */ |
| static AESInfo *DestroyAESInfo(AESInfo *aes_info) |
| { |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| assert(aes_info != (AESInfo *) NULL); |
| assert(aes_info->signature == MagickCoreSignature); |
| if (aes_info->decipher_key != (unsigned int *) NULL) |
| aes_info->decipher_key=(unsigned int *) RelinquishMagickMemory( |
| aes_info->decipher_key); |
| if (aes_info->encipher_key != (unsigned int *) NULL) |
| aes_info->encipher_key=(unsigned int *) RelinquishMagickMemory( |
| aes_info->encipher_key); |
| if (aes_info->key != (StringInfo *) NULL) |
| aes_info->key=DestroyStringInfo(aes_info->key); |
| aes_info->signature=(~MagickCoreSignature); |
| aes_info=(AESInfo *) RelinquishMagickMemory(aes_info); |
| return(aes_info); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % E n c i p h e r A E S B l o c k % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % EncipherAESBlock() enciphers a single block of plaintext to produce a block |
| % of ciphertext. |
| % |
| % The format of the EncipherAESBlock method is: |
| % |
| % void EncipherAES(AESInfo *aes_info,const unsigned char *plaintext, |
| % unsigned char *ciphertext) |
| % |
| % A description of each parameter follows: |
| % |
| % o aes_info: the cipher context. |
| % |
| % o plaintext: the plain text. |
| % |
| % o ciphertext: the cipher text. |
| % |
| */ |
| |
| static inline void AddRoundKey(const unsigned int *ciphertext, |
| const unsigned int *key,unsigned int *plaintext) |
| { |
| register ssize_t |
| i; |
| |
| /* |
| Xor corresponding text input and round key input bytes. |
| */ |
| for (i=0; i < 4; i++) |
| plaintext[i]=key[i] ^ ciphertext[i]; |
| } |
| |
| static inline unsigned char ByteMultiply(const unsigned char alpha, |
| const unsigned char beta) |
| { |
| /* |
| Byte multiply two elements of GF(2^m) (mix columns and inverse mix columns). |
| */ |
| if ((alpha == 0) || (beta == 0)) |
| return(0); |
| return(InverseLog[(Log[alpha]+Log[beta]) % 0xff]); |
| } |
| |
| static inline unsigned int ByteSubTransform(unsigned int x, |
| unsigned char *s_box) |
| { |
| unsigned int |
| key; |
| |
| /* |
| Non-linear layer resists differential and linear cryptoanalysis attacks. |
| */ |
| key=(s_box[x & 0xff]) | (s_box[(x >> 8) & 0xff] << 8) | |
| (s_box[(x >> 16) & 0xff] << 16) | (s_box[(x >> 24) & 0xff] << 24); |
| return(key); |
| } |
| |
| static void FinalizeRoundKey(const unsigned int *ciphertext, |
| const unsigned int *key,unsigned char *plaintext) |
| { |
| register unsigned char |
| *p; |
| |
| register unsigned int |
| i, |
| j; |
| |
| unsigned int |
| value; |
| |
| /* |
| The round key is XORed with the result of the mix-column transformation. |
| */ |
| p=plaintext; |
| for (i=0; i < 4; i++) |
| { |
| value=ciphertext[i] ^ key[i]; |
| for (j=0; j < 4; j++) |
| *p++=(unsigned char) ((value >> (8*j)) & 0xff); |
| } |
| /* |
| Reset registers. |
| */ |
| value=0; |
| } |
| |
| static void InitializeRoundKey(const unsigned char *ciphertext, |
| const unsigned int *key,unsigned int *plaintext) |
| { |
| register const unsigned char |
| *p; |
| |
| register unsigned int |
| i, |
| j; |
| |
| unsigned int |
| value; |
| |
| p=ciphertext; |
| for (i=0; i < 4; i++) |
| { |
| value=0; |
| for (j=0; j < 4; j++) |
| value|=(*p++ << (8*j)); |
| plaintext[i]=key[i] ^ value; |
| } |
| /* |
| Reset registers. |
| */ |
| value=0; |
| } |
| |
| static inline unsigned int RotateLeft(const unsigned int x) |
| { |
| return(((x << 8) | ((x >> 24) & 0xff))); |
| } |
| |
| static void EncipherAESBlock(AESInfo *aes_info,const unsigned char *plaintext, |
| unsigned char *ciphertext) |
| { |
| register ssize_t |
| i, |
| j; |
| |
| static int |
| map[4][4] = |
| { |
| { 0, 1, 2, 3 }, |
| { 1, 2, 3, 0 }, |
| { 2, 3, 0, 1 }, |
| { 3, 0, 1, 2 } |
| }; |
| |
| static unsigned int |
| D[] = |
| { |
| 0xa56363c6U, 0x847c7cf8U, 0x997777eeU, 0x8d7b7bf6U, 0x0df2f2ffU, |
| 0xbd6b6bd6U, 0xb16f6fdeU, 0x54c5c591U, 0x50303060U, 0x03010102U, |
| 0xa96767ceU, 0x7d2b2b56U, 0x19fefee7U, 0x62d7d7b5U, 0xe6abab4dU, |
| 0x9a7676ecU, 0x45caca8fU, 0x9d82821fU, 0x40c9c989U, 0x877d7dfaU, |
| 0x15fafaefU, 0xeb5959b2U, 0xc947478eU, 0x0bf0f0fbU, 0xecadad41U, |
| 0x67d4d4b3U, 0xfda2a25fU, 0xeaafaf45U, 0xbf9c9c23U, 0xf7a4a453U, |
| 0x967272e4U, 0x5bc0c09bU, 0xc2b7b775U, 0x1cfdfde1U, 0xae93933dU, |
| 0x6a26264cU, 0x5a36366cU, 0x413f3f7eU, 0x02f7f7f5U, 0x4fcccc83U, |
| 0x5c343468U, 0xf4a5a551U, 0x34e5e5d1U, 0x08f1f1f9U, 0x937171e2U, |
| 0x73d8d8abU, 0x53313162U, 0x3f15152aU, 0x0c040408U, 0x52c7c795U, |
| 0x65232346U, 0x5ec3c39dU, 0x28181830U, 0xa1969637U, 0x0f05050aU, |
| 0xb59a9a2fU, 0x0907070eU, 0x36121224U, 0x9b80801bU, 0x3de2e2dfU, |
| 0x26ebebcdU, 0x6927274eU, 0xcdb2b27fU, 0x9f7575eaU, 0x1b090912U, |
| 0x9e83831dU, 0x742c2c58U, 0x2e1a1a34U, 0x2d1b1b36U, 0xb26e6edcU, |
| 0xee5a5ab4U, 0xfba0a05bU, 0xf65252a4U, 0x4d3b3b76U, 0x61d6d6b7U, |
| 0xceb3b37dU, 0x7b292952U, 0x3ee3e3ddU, 0x712f2f5eU, 0x97848413U, |
| 0xf55353a6U, 0x68d1d1b9U, 0x00000000U, 0x2cededc1U, 0x60202040U, |
| 0x1ffcfce3U, 0xc8b1b179U, 0xed5b5bb6U, 0xbe6a6ad4U, 0x46cbcb8dU, |
| 0xd9bebe67U, 0x4b393972U, 0xde4a4a94U, 0xd44c4c98U, 0xe85858b0U, |
| 0x4acfcf85U, 0x6bd0d0bbU, 0x2aefefc5U, 0xe5aaaa4fU, 0x16fbfbedU, |
| 0xc5434386U, 0xd74d4d9aU, 0x55333366U, 0x94858511U, 0xcf45458aU, |
| 0x10f9f9e9U, 0x06020204U, 0x817f7ffeU, 0xf05050a0U, 0x443c3c78U, |
| 0xba9f9f25U, 0xe3a8a84bU, 0xf35151a2U, 0xfea3a35dU, 0xc0404080U, |
| 0x8a8f8f05U, 0xad92923fU, 0xbc9d9d21U, 0x48383870U, 0x04f5f5f1U, |
| 0xdfbcbc63U, 0xc1b6b677U, 0x75dadaafU, 0x63212142U, 0x30101020U, |
| 0x1affffe5U, 0x0ef3f3fdU, 0x6dd2d2bfU, 0x4ccdcd81U, 0x140c0c18U, |
| 0x35131326U, 0x2fececc3U, 0xe15f5fbeU, 0xa2979735U, 0xcc444488U, |
| 0x3917172eU, 0x57c4c493U, 0xf2a7a755U, 0x827e7efcU, 0x473d3d7aU, |
| 0xac6464c8U, 0xe75d5dbaU, 0x2b191932U, 0x957373e6U, 0xa06060c0U, |
| 0x98818119U, 0xd14f4f9eU, 0x7fdcdca3U, 0x66222244U, 0x7e2a2a54U, |
| 0xab90903bU, 0x8388880bU, 0xca46468cU, 0x29eeeec7U, 0xd3b8b86bU, |
| 0x3c141428U, 0x79dedea7U, 0xe25e5ebcU, 0x1d0b0b16U, 0x76dbdbadU, |
| 0x3be0e0dbU, 0x56323264U, 0x4e3a3a74U, 0x1e0a0a14U, 0xdb494992U, |
| 0x0a06060cU, 0x6c242448U, 0xe45c5cb8U, 0x5dc2c29fU, 0x6ed3d3bdU, |
| 0xefacac43U, 0xa66262c4U, 0xa8919139U, 0xa4959531U, 0x37e4e4d3U, |
| 0x8b7979f2U, 0x32e7e7d5U, 0x43c8c88bU, 0x5937376eU, 0xb76d6ddaU, |
| 0x8c8d8d01U, 0x64d5d5b1U, 0xd24e4e9cU, 0xe0a9a949U, 0xb46c6cd8U, |
| 0xfa5656acU, 0x07f4f4f3U, 0x25eaeacfU, 0xaf6565caU, 0x8e7a7af4U, |
| 0xe9aeae47U, 0x18080810U, 0xd5baba6fU, 0x887878f0U, 0x6f25254aU, |
| 0x722e2e5cU, 0x241c1c38U, 0xf1a6a657U, 0xc7b4b473U, 0x51c6c697U, |
| 0x23e8e8cbU, 0x7cdddda1U, 0x9c7474e8U, 0x211f1f3eU, 0xdd4b4b96U, |
| 0xdcbdbd61U, 0x868b8b0dU, 0x858a8a0fU, 0x907070e0U, 0x423e3e7cU, |
| 0xc4b5b571U, 0xaa6666ccU, 0xd8484890U, 0x05030306U, 0x01f6f6f7U, |
| 0x120e0e1cU, 0xa36161c2U, 0x5f35356aU, 0xf95757aeU, 0xd0b9b969U, |
| 0x91868617U, 0x58c1c199U, 0x271d1d3aU, 0xb99e9e27U, 0x38e1e1d9U, |
| 0x13f8f8ebU, 0xb398982bU, 0x33111122U, 0xbb6969d2U, 0x70d9d9a9U, |
| 0x898e8e07U, 0xa7949433U, 0xb69b9b2dU, 0x221e1e3cU, 0x92878715U, |
| 0x20e9e9c9U, 0x49cece87U, 0xff5555aaU, 0x78282850U, 0x7adfdfa5U, |
| 0x8f8c8c03U, 0xf8a1a159U, 0x80898909U, 0x170d0d1aU, 0xdabfbf65U, |
| 0x31e6e6d7U, 0xc6424284U, 0xb86868d0U, 0xc3414182U, 0xb0999929U, |
| 0x772d2d5aU, 0x110f0f1eU, 0xcbb0b07bU, 0xfc5454a8U, 0xd6bbbb6dU, |
| 0x3a16162cU |
| }; |
| |
| unsigned int |
| alpha, |
| key[4], |
| text[4]; |
| |
| /* |
| Encipher one block. |
| */ |
| (void) memset(text,0,sizeof(text)); |
| InitializeRoundKey(plaintext,aes_info->encipher_key,text); |
| for (i=1; i < aes_info->rounds; i++) |
| { |
| /* |
| Linear mixing step: cause diffusion of the bits over multiple rounds. |
| */ |
| for (j=0; j < 4; j++) |
| key[j]=D[text[j] & 0xff] ^ |
| RotateLeft(D[(text[map[1][j]] >> 8) & 0xff] ^ |
| RotateLeft(D[(text[map[2][j]] >> 16) & 0xff] ^ |
| RotateLeft(D[(text[map[3][j]] >> 24) & 0xff]))); |
| AddRoundKey(key,aes_info->encipher_key+4*i,text); |
| } |
| for (i=0; i < 4; i++) |
| { |
| alpha=(text[i] & 0x000000ff) | ((text[map[1][i]]) & 0x0000ff00) | |
| ((text[map[2][i]]) & 0x00ff0000) | ((text[map[3][i]]) & 0xff000000); |
| key[i]=ByteSubTransform(alpha,SBox); |
| } |
| FinalizeRoundKey(key,aes_info->encipher_key+4*aes_info->rounds,ciphertext); |
| /* |
| Reset registers. |
| */ |
| alpha=0; |
| (void) ResetMagickMemory(key,0,sizeof(key)); |
| (void) ResetMagickMemory(text,0,sizeof(text)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % P a s s k e y D e c i p h e r I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % PasskeyDecipherImage() converts cipher pixels to plain pixels. |
| % |
| % The format of the PasskeyDecipherImage method is: |
| % |
| % MagickBooleanType PasskeyDecipherImage(Image *image, |
| % const StringInfo *passkey,ExceptionInfo *exception) |
| % MagickBooleanType DecipherImage(Image *image,const char *passphrase, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o passphrase: decipher cipher pixels with this passphrase. |
| % |
| % o passkey: decrypt cipher pixels with this passkey. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| static inline void IncrementCipherNonce(const size_t length, |
| unsigned char *nonce) |
| { |
| register ssize_t |
| i; |
| |
| for (i=(ssize_t) (length-1); i >= 0; i--) |
| { |
| nonce[i]++; |
| if (nonce[i] != 0) |
| return; |
| } |
| ThrowFatalException(ResourceLimitFatalError,"Sequence wrap error `%s'"); |
| } |
| |
| MagickExport MagickBooleanType DecipherImage(Image *image, |
| const char *passphrase,ExceptionInfo *exception) |
| { |
| MagickBooleanType |
| status; |
| |
| StringInfo |
| *passkey; |
| |
| if (passphrase == (const char *) NULL) |
| return(MagickTrue); |
| passkey=StringToStringInfo(passphrase); |
| if (passkey == (StringInfo *) NULL) |
| return(MagickFalse); |
| status=PasskeyDecipherImage(image,passkey,exception); |
| passkey=DestroyStringInfo(passkey); |
| return(status); |
| } |
| |
| MagickExport MagickBooleanType PasskeyDecipherImage(Image *image, |
| const StringInfo *passkey,ExceptionInfo *exception) |
| { |
| #define DecipherImageTag "Decipher/Image " |
| |
| AESInfo |
| *aes_info; |
| |
| CacheView |
| *image_view; |
| |
| const unsigned char |
| *digest; |
| |
| MagickBooleanType |
| proceed; |
| |
| MagickSizeType |
| extent; |
| |
| QuantumInfo |
| *quantum_info; |
| |
| QuantumType |
| quantum_type; |
| |
| SignatureInfo |
| *signature_info; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| length; |
| |
| ssize_t |
| y; |
| |
| StringInfo |
| *key, |
| *nonce; |
| |
| unsigned char |
| input_block[AESBlocksize], |
| output_block[AESBlocksize], |
| *pixels; |
| |
| /* |
| Generate decipher key and nonce. |
| */ |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| if (passkey == (const StringInfo *) NULL) |
| return(MagickTrue); |
| aes_info=AcquireAESInfo(); |
| key=CloneStringInfo(passkey); |
| if (key == (StringInfo *) NULL) |
| { |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| nonce=SplitStringInfo(key,GetStringInfoLength(key)/2); |
| if (nonce == (StringInfo *) NULL) |
| { |
| key=DestroyStringInfo(key); |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| SetAESKey(aes_info,key); |
| key=DestroyStringInfo(key); |
| signature_info=AcquireSignatureInfo(); |
| UpdateSignature(signature_info,nonce); |
| extent=(MagickSizeType) image->columns*image->rows; |
| SetStringInfoLength(nonce,sizeof(extent)); |
| SetStringInfoDatum(nonce,(const unsigned char *) &extent); |
| UpdateSignature(signature_info,nonce); |
| nonce=DestroyStringInfo(nonce); |
| FinalizeSignature(signature_info); |
| (void) ResetMagickMemory(input_block,0,sizeof(input_block)); |
| digest=GetStringInfoDatum(GetSignatureDigest(signature_info)); |
| (void) CopyMagickMemory(input_block,digest,MagickMin(AESBlocksize, |
| GetSignatureDigestsize(signature_info))*sizeof(*input_block)); |
| signature_info=DestroySignatureInfo(signature_info); |
| /* |
| Convert cipher pixels to plain pixels. |
| */ |
| quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image); |
| if (quantum_info == (QuantumInfo *) NULL) |
| { |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| quantum_type=GetQuantumType(image,exception); |
| pixels=(unsigned char *) GetQuantumPixels(quantum_info); |
| image_view=AcquireAuthenticCacheView(image,exception); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register ssize_t |
| i, |
| x; |
| |
| register Quantum |
| *magick_restrict q; |
| |
| q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type, |
| pixels,exception); |
| p=pixels; |
| for (x=0; x < (ssize_t) length; x+=AESBlocksize) |
| { |
| (void) CopyMagickMemory(output_block,input_block,AESBlocksize* |
| sizeof(*output_block)); |
| IncrementCipherNonce(AESBlocksize,input_block); |
| EncipherAESBlock(aes_info,output_block,output_block); |
| for (i=0; i < AESBlocksize; i++) |
| p[i]^=output_block[i]; |
| p+=AESBlocksize; |
| } |
| (void) CopyMagickMemory(output_block,input_block,AESBlocksize* |
| sizeof(*output_block)); |
| EncipherAESBlock(aes_info,output_block,output_block); |
| for (i=0; x < (ssize_t) length; x++) |
| { |
| p[i]^=output_block[i]; |
| i++; |
| } |
| (void) ImportQuantumPixels(image,image_view,quantum_info,quantum_type, |
| pixels,exception); |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| break; |
| proceed=SetImageProgress(image,DecipherImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (proceed == MagickFalse) |
| break; |
| } |
| image_view=DestroyCacheView(image_view); |
| (void) DeleteImageProperty(image,"cipher:type"); |
| (void) DeleteImageProperty(image,"cipher:mode"); |
| (void) DeleteImageProperty(image,"cipher:nonce"); |
| image->taint=MagickFalse; |
| /* |
| Free resources. |
| */ |
| quantum_info=DestroyQuantumInfo(quantum_info); |
| aes_info=DestroyAESInfo(aes_info); |
| (void) ResetMagickMemory(input_block,0,sizeof(input_block)); |
| (void) ResetMagickMemory(output_block,0,sizeof(output_block)); |
| return(y == (ssize_t) image->rows ? MagickTrue : MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % P a s s k e y E n c i p h e r I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % PasskeyEncipherImage() converts pixels to cipher-pixels. |
| % |
| % The format of the PasskeyEncipherImage method is: |
| % |
| % MagickBooleanType PasskeyEncipherImage(Image *image, |
| % const StringInfo *passkey,ExceptionInfo *exception) |
| % MagickBooleanType EncipherImage(Image *image,const char *passphrase, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o passphrase: encipher pixels with this passphrase. |
| % |
| % o passkey: decrypt cipher pixels with this passkey. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| MagickExport MagickBooleanType EncipherImage(Image *image, |
| const char *passphrase,ExceptionInfo *exception) |
| { |
| MagickBooleanType |
| status; |
| |
| StringInfo |
| *passkey; |
| |
| if (passphrase == (const char *) NULL) |
| return(MagickTrue); |
| passkey=StringToStringInfo(passphrase); |
| if (passkey == (StringInfo *) NULL) |
| return(MagickFalse); |
| status=PasskeyEncipherImage(image,passkey,exception); |
| passkey=DestroyStringInfo(passkey); |
| return(status); |
| } |
| |
| MagickExport MagickBooleanType PasskeyEncipherImage(Image *image, |
| const StringInfo *passkey,ExceptionInfo *exception) |
| { |
| #define EncipherImageTag "Encipher/Image " |
| |
| AESInfo |
| *aes_info; |
| |
| CacheView |
| *image_view; |
| |
| char |
| *signature; |
| |
| const unsigned char |
| *digest; |
| |
| MagickBooleanType |
| proceed; |
| |
| MagickSizeType |
| extent; |
| |
| QuantumInfo |
| *quantum_info; |
| |
| QuantumType |
| quantum_type; |
| |
| register unsigned char |
| *p; |
| |
| SignatureInfo |
| *signature_info; |
| |
| size_t |
| length; |
| |
| ssize_t |
| y; |
| |
| StringInfo |
| *key, |
| *nonce; |
| |
| unsigned char |
| input_block[AESBlocksize], |
| output_block[AESBlocksize], |
| *pixels; |
| |
| /* |
| Generate encipher key and nonce. |
| */ |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| if (passkey == (const StringInfo *) NULL) |
| return(MagickTrue); |
| if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse) |
| return(MagickFalse); |
| aes_info=AcquireAESInfo(); |
| key=CloneStringInfo(passkey); |
| if (key == (StringInfo *) NULL) |
| { |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| nonce=SplitStringInfo(key,GetStringInfoLength(key)/2); |
| if (nonce == (StringInfo *) NULL) |
| { |
| key=DestroyStringInfo(key); |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| SetAESKey(aes_info,key); |
| key=DestroyStringInfo(key); |
| signature_info=AcquireSignatureInfo(); |
| UpdateSignature(signature_info,nonce); |
| extent=(MagickSizeType) image->columns*image->rows; |
| SetStringInfoLength(nonce,sizeof(extent)); |
| SetStringInfoDatum(nonce,(const unsigned char *) &extent); |
| UpdateSignature(signature_info,nonce); |
| nonce=DestroyStringInfo(nonce); |
| FinalizeSignature(signature_info); |
| signature=StringInfoToHexString(GetSignatureDigest(signature_info)); |
| (void) SetImageProperty(image,"cipher:type","AES",exception); |
| (void) SetImageProperty(image,"cipher:mode","CTR",exception); |
| (void) SetImageProperty(image,"cipher:nonce",signature,exception); |
| signature=DestroyString(signature); |
| (void) ResetMagickMemory(input_block,0,sizeof(input_block)); |
| digest=GetStringInfoDatum(GetSignatureDigest(signature_info)); |
| (void) CopyMagickMemory(input_block,digest,MagickMin(AESBlocksize, |
| GetSignatureDigestsize(signature_info))*sizeof(*input_block)); |
| signature_info=DestroySignatureInfo(signature_info); |
| /* |
| Convert plain pixels to cipher pixels. |
| */ |
| quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image); |
| if (quantum_info == (QuantumInfo *) NULL) |
| { |
| aes_info=DestroyAESInfo(aes_info); |
| ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed", |
| image->filename); |
| } |
| quantum_type=GetQuantumType(image,exception); |
| pixels=(unsigned char *) GetQuantumPixels(quantum_info); |
| image_view=AcquireAuthenticCacheView(image,exception); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register ssize_t |
| i, |
| x; |
| |
| register Quantum |
| *magick_restrict q; |
| |
| q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type, |
| pixels,exception); |
| p=pixels; |
| for (x=0; x < (ssize_t) length; x+=AESBlocksize) |
| { |
| (void) CopyMagickMemory(output_block,input_block,AESBlocksize* |
| sizeof(*output_block)); |
| IncrementCipherNonce(AESBlocksize,input_block); |
| EncipherAESBlock(aes_info,output_block,output_block); |
| for (i=0; i < AESBlocksize; i++) |
| p[i]^=output_block[i]; |
| p+=AESBlocksize; |
| } |
| (void) CopyMagickMemory(output_block,input_block,AESBlocksize* |
| sizeof(*output_block)); |
| EncipherAESBlock(aes_info,output_block,output_block); |
| for (i=0; x < (ssize_t) length; x++) |
| { |
| p[i]^=output_block[i]; |
| i++; |
| } |
| (void) ImportQuantumPixels(image,image_view,quantum_info,quantum_type, |
| pixels,exception); |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| break; |
| proceed=SetImageProgress(image,EncipherImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (proceed == MagickFalse) |
| break; |
| } |
| image_view=DestroyCacheView(image_view); |
| image->taint=MagickFalse; |
| /* |
| Free resources. |
| */ |
| quantum_info=DestroyQuantumInfo(quantum_info); |
| aes_info=DestroyAESInfo(aes_info); |
| (void) ResetMagickMemory(input_block,0,sizeof(input_block)); |
| (void) ResetMagickMemory(output_block,0,sizeof(output_block)); |
| return(y == (ssize_t) image->rows ? MagickTrue : MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % S e t A E S K e y % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % SetAESKey() sets the key for the AES cipher. The key length is specified |
| % in bits. Valid values are 128, 192, or 256 requiring a key buffer length |
| % in bytes of 16, 24, and 32 respectively. |
| % |
| % The format of the SetAESKey method is: |
| % |
| % SetAESKey(AESInfo *aes_info,const StringInfo *key) |
| % |
| % A description of each parameter follows: |
| % |
| % o aes_info: the cipher context. |
| % |
| % o key: the key. |
| % |
| */ |
| |
| static inline void InverseAddRoundKey(const unsigned int *alpha, |
| unsigned int *beta) |
| { |
| register unsigned int |
| i, |
| j; |
| |
| for (i=0; i < 4; i++) |
| { |
| beta[i]=0; |
| for (j=0; j < 4; j++) |
| beta[i]|=(ByteMultiply(0xe,(alpha[i] >> (8*j)) & 0xff) ^ |
| ByteMultiply(0xb,(alpha[i] >> (8*((j+1) % 4))) & 0xff) ^ |
| ByteMultiply(0xd,(alpha[i] >> (8*((j+2) % 4))) & 0xff) ^ |
| ByteMultiply(0x9,(alpha[i] >> (8*((j+3) % 4))) & 0xff)) << (8*j); |
| } |
| } |
| |
| static inline unsigned int XTime(unsigned char alpha) |
| { |
| unsigned char |
| beta; |
| |
| beta=(unsigned char) ((alpha & 0x80) != 0 ? 0x1b : 0); |
| alpha<<=1; |
| alpha^=beta; |
| return(alpha); |
| } |
| |
| static inline unsigned int RotateRight(const unsigned int x) |
| { |
| return((x >> 8) | ((x & 0xff) << 24)); |
| } |
| |
| static void SetAESKey(AESInfo *aes_info,const StringInfo *key) |
| { |
| register ssize_t |
| i; |
| |
| ssize_t |
| bytes, |
| n; |
| |
| unsigned char |
| *datum; |
| |
| unsigned int |
| alpha, |
| beta; |
| |
| /* |
| Determine the number of rounds based on the number of bits in key. |
| */ |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| assert(aes_info != (AESInfo *) NULL); |
| assert(aes_info->signature == MagickCoreSignature); |
| assert(key != (StringInfo *) NULL); |
| n=4; |
| aes_info->rounds=10; |
| if ((8*GetStringInfoLength(key)) >= 256) |
| { |
| n=8; |
| aes_info->rounds=14; |
| } |
| else |
| if ((8*GetStringInfoLength(key)) >= 192) |
| { |
| n=6; |
| aes_info->rounds=12; |
| } |
| /* |
| Generate crypt key. |
| */ |
| datum=GetStringInfoDatum(aes_info->key); |
| (void) ResetMagickMemory(datum,0,GetStringInfoLength(aes_info->key)); |
| (void) CopyMagickMemory(datum,GetStringInfoDatum(key),MagickMin( |
| GetStringInfoLength(key),GetStringInfoLength(aes_info->key))); |
| for (i=0; i < n; i++) |
| aes_info->encipher_key[i]=datum[4*i] | (datum[4*i+1] << 8) | |
| (datum[4*i+2] << 16) | (datum[4*i+3] << 24); |
| beta=1; |
| bytes=(AESBlocksize/4)*(aes_info->rounds+1); |
| for (i=n; i < bytes; i++) |
| { |
| alpha=aes_info->encipher_key[i-1]; |
| if ((i % n) == 0) |
| { |
| alpha=ByteSubTransform(RotateRight(alpha),SBox) ^ beta; |
| beta=XTime((unsigned char) (beta & 0xff)); |
| } |
| else |
| if ((n > 6) && ((i % n) == 4)) |
| alpha=ByteSubTransform(alpha,SBox); |
| aes_info->encipher_key[i]=aes_info->encipher_key[i-n] ^ alpha; |
| } |
| /* |
| Generate deciper key (in reverse order). |
| */ |
| for (i=0; i < 4; i++) |
| { |
| aes_info->decipher_key[i]=aes_info->encipher_key[i]; |
| aes_info->decipher_key[bytes-4+i]=aes_info->encipher_key[bytes-4+i]; |
| } |
| for (i=4; i < (bytes-4); i+=4) |
| InverseAddRoundKey(aes_info->encipher_key+i,aes_info->decipher_key+i); |
| /* |
| Reset registers. |
| */ |
| datum=GetStringInfoDatum(aes_info->key); |
| (void) ResetMagickMemory(datum,0,GetStringInfoLength(aes_info->key)); |
| alpha=0; |
| beta=0; |
| } |
| #else |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % P a s s k e y D e c i p h e r I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % PasskeyDecipherImage() converts cipher pixels to plain pixels. |
| % |
| % The format of the PasskeyDecipherImage method is: |
| % |
| % MagickBooleanType PasskeyDecipherImage(Image *image, |
| % const StringInfo *passkey,ExceptionInfo *exception) |
| % MagickBooleanType DecipherImage(Image *image,const char *passphrase, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o passphrase: decipher cipher pixels with this passphrase. |
| % |
| % o passkey: decrypt cipher pixels with this passkey. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| MagickExport MagickBooleanType DecipherImage(Image *image, |
| const char *passphrase,ExceptionInfo *exception) |
| { |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| (void) passphrase; |
| ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename); |
| } |
| |
| MagickExport MagickBooleanType PasskeyDecipherImage(Image *image, |
| const StringInfo *passkey,ExceptionInfo *exception) |
| { |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| (void) passkey; |
| ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % P a s s k e y E n c i p h e r I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % PasskeyEncipherImage() converts pixels to cipher-pixels. |
| % |
| % The format of the PasskeyEncipherImage method is: |
| % |
| % MagickBooleanType PasskeyEncipherImage(Image *image, |
| % const StringInfo *passkey,ExceptionInfo *exception) |
| % MagickBooleanType EncipherImage(Image *image,const char *passphrase, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o passphrase: decipher cipher pixels with this passphrase. |
| % |
| % o passkey: decrypt cipher pixels with this passkey. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| MagickExport MagickBooleanType EncipherImage(Image *image, |
| const char *passphrase,ExceptionInfo *exception) |
| { |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| (void) passphrase; |
| ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename); |
| } |
| |
| MagickExport MagickBooleanType PasskeyEncipherImage(Image *image, |
| const StringInfo *passkey,ExceptionInfo *exception) |
| { |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| (void) passkey; |
| ThrowBinaryException(ImageError,"CipherSupportNotEnabled",image->filename); |
| } |
| #endif |