aes.c 23 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2011 The Chromium OS Authors.
  4. * (C) Copyright 2011 NVIDIA Corporation www.nvidia.com
  5. */
  6. /*
  7. * advanced encryption standard
  8. * author: karl malbrain, malbrain@yahoo.com
  9. *
  10. * This work, including the source code, documentation
  11. * and related data, is placed into the public domain.
  12. *
  13. * The orginal author is Karl Malbrain.
  14. *
  15. * THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY
  16. * OF ANY KIND, NOT EVEN THE IMPLIED WARRANTY OF
  17. * MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE,
  18. * ASSUMES _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE
  19. * RESULTING FROM THE USE, MODIFICATION, OR
  20. * REDISTRIBUTION OF THIS SOFTWARE.
  21. */
  22. #ifndef USE_HOSTCC
  23. #include <common.h>
  24. #else
  25. #include <string.h>
  26. #endif
  27. #include "uboot_aes.h"
  28. /* forward s-box */
  29. static const u8 sbox[256] = {
  30. 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5,
  31. 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
  32. 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
  33. 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
  34. 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc,
  35. 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
  36. 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a,
  37. 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
  38. 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
  39. 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
  40. 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
  41. 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
  42. 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
  43. 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
  44. 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
  45. 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
  46. 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17,
  47. 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
  48. 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88,
  49. 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
  50. 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
  51. 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
  52. 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9,
  53. 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
  54. 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6,
  55. 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
  56. 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
  57. 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
  58. 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94,
  59. 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
  60. 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68,
  61. 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
  62. };
  63. /* inverse s-box */
  64. static const u8 inv_sbox[256] = {
  65. 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38,
  66. 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
  67. 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
  68. 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
  69. 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d,
  70. 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
  71. 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2,
  72. 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
  73. 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
  74. 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
  75. 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
  76. 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
  77. 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
  78. 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
  79. 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
  80. 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
  81. 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea,
  82. 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
  83. 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85,
  84. 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
  85. 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
  86. 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
  87. 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20,
  88. 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
  89. 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31,
  90. 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
  91. 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
  92. 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
  93. 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0,
  94. 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
  95. 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26,
  96. 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
  97. };
  98. /* combined Xtimes2[Sbox[]] */
  99. static const u8 x2_sbox[256] = {
  100. 0xc6, 0xf8, 0xee, 0xf6, 0xff, 0xd6, 0xde, 0x91,
  101. 0x60, 0x02, 0xce, 0x56, 0xe7, 0xb5, 0x4d, 0xec,
  102. 0x8f, 0x1f, 0x89, 0xfa, 0xef, 0xb2, 0x8e, 0xfb,
  103. 0x41, 0xb3, 0x5f, 0x45, 0x23, 0x53, 0xe4, 0x9b,
  104. 0x75, 0xe1, 0x3d, 0x4c, 0x6c, 0x7e, 0xf5, 0x83,
  105. 0x68, 0x51, 0xd1, 0xf9, 0xe2, 0xab, 0x62, 0x2a,
  106. 0x08, 0x95, 0x46, 0x9d, 0x30, 0x37, 0x0a, 0x2f,
  107. 0x0e, 0x24, 0x1b, 0xdf, 0xcd, 0x4e, 0x7f, 0xea,
  108. 0x12, 0x1d, 0x58, 0x34, 0x36, 0xdc, 0xb4, 0x5b,
  109. 0xa4, 0x76, 0xb7, 0x7d, 0x52, 0xdd, 0x5e, 0x13,
  110. 0xa6, 0xb9, 0x00, 0xc1, 0x40, 0xe3, 0x79, 0xb6,
  111. 0xd4, 0x8d, 0x67, 0x72, 0x94, 0x98, 0xb0, 0x85,
  112. 0xbb, 0xc5, 0x4f, 0xed, 0x86, 0x9a, 0x66, 0x11,
  113. 0x8a, 0xe9, 0x04, 0xfe, 0xa0, 0x78, 0x25, 0x4b,
  114. 0xa2, 0x5d, 0x80, 0x05, 0x3f, 0x21, 0x70, 0xf1,
  115. 0x63, 0x77, 0xaf, 0x42, 0x20, 0xe5, 0xfd, 0xbf,
  116. 0x81, 0x18, 0x26, 0xc3, 0xbe, 0x35, 0x88, 0x2e,
  117. 0x93, 0x55, 0xfc, 0x7a, 0xc8, 0xba, 0x32, 0xe6,
  118. 0xc0, 0x19, 0x9e, 0xa3, 0x44, 0x54, 0x3b, 0x0b,
  119. 0x8c, 0xc7, 0x6b, 0x28, 0xa7, 0xbc, 0x16, 0xad,
  120. 0xdb, 0x64, 0x74, 0x14, 0x92, 0x0c, 0x48, 0xb8,
  121. 0x9f, 0xbd, 0x43, 0xc4, 0x39, 0x31, 0xd3, 0xf2,
  122. 0xd5, 0x8b, 0x6e, 0xda, 0x01, 0xb1, 0x9c, 0x49,
  123. 0xd8, 0xac, 0xf3, 0xcf, 0xca, 0xf4, 0x47, 0x10,
  124. 0x6f, 0xf0, 0x4a, 0x5c, 0x38, 0x57, 0x73, 0x97,
  125. 0xcb, 0xa1, 0xe8, 0x3e, 0x96, 0x61, 0x0d, 0x0f,
  126. 0xe0, 0x7c, 0x71, 0xcc, 0x90, 0x06, 0xf7, 0x1c,
  127. 0xc2, 0x6a, 0xae, 0x69, 0x17, 0x99, 0x3a, 0x27,
  128. 0xd9, 0xeb, 0x2b, 0x22, 0xd2, 0xa9, 0x07, 0x33,
  129. 0x2d, 0x3c, 0x15, 0xc9, 0x87, 0xaa, 0x50, 0xa5,
  130. 0x03, 0x59, 0x09, 0x1a, 0x65, 0xd7, 0x84, 0xd0,
  131. 0x82, 0x29, 0x5a, 0x1e, 0x7b, 0xa8, 0x6d, 0x2c
  132. };
  133. /* combined Xtimes3[Sbox[]] */
  134. static const u8 x3_sbox[256] = {
  135. 0xa5, 0x84, 0x99, 0x8d, 0x0d, 0xbd, 0xb1, 0x54,
  136. 0x50, 0x03, 0xa9, 0x7d, 0x19, 0x62, 0xe6, 0x9a,
  137. 0x45, 0x9d, 0x40, 0x87, 0x15, 0xeb, 0xc9, 0x0b,
  138. 0xec, 0x67, 0xfd, 0xea, 0xbf, 0xf7, 0x96, 0x5b,
  139. 0xc2, 0x1c, 0xae, 0x6a, 0x5a, 0x41, 0x02, 0x4f,
  140. 0x5c, 0xf4, 0x34, 0x08, 0x93, 0x73, 0x53, 0x3f,
  141. 0x0c, 0x52, 0x65, 0x5e, 0x28, 0xa1, 0x0f, 0xb5,
  142. 0x09, 0x36, 0x9b, 0x3d, 0x26, 0x69, 0xcd, 0x9f,
  143. 0x1b, 0x9e, 0x74, 0x2e, 0x2d, 0xb2, 0xee, 0xfb,
  144. 0xf6, 0x4d, 0x61, 0xce, 0x7b, 0x3e, 0x71, 0x97,
  145. 0xf5, 0x68, 0x00, 0x2c, 0x60, 0x1f, 0xc8, 0xed,
  146. 0xbe, 0x46, 0xd9, 0x4b, 0xde, 0xd4, 0xe8, 0x4a,
  147. 0x6b, 0x2a, 0xe5, 0x16, 0xc5, 0xd7, 0x55, 0x94,
  148. 0xcf, 0x10, 0x06, 0x81, 0xf0, 0x44, 0xba, 0xe3,
  149. 0xf3, 0xfe, 0xc0, 0x8a, 0xad, 0xbc, 0x48, 0x04,
  150. 0xdf, 0xc1, 0x75, 0x63, 0x30, 0x1a, 0x0e, 0x6d,
  151. 0x4c, 0x14, 0x35, 0x2f, 0xe1, 0xa2, 0xcc, 0x39,
  152. 0x57, 0xf2, 0x82, 0x47, 0xac, 0xe7, 0x2b, 0x95,
  153. 0xa0, 0x98, 0xd1, 0x7f, 0x66, 0x7e, 0xab, 0x83,
  154. 0xca, 0x29, 0xd3, 0x3c, 0x79, 0xe2, 0x1d, 0x76,
  155. 0x3b, 0x56, 0x4e, 0x1e, 0xdb, 0x0a, 0x6c, 0xe4,
  156. 0x5d, 0x6e, 0xef, 0xa6, 0xa8, 0xa4, 0x37, 0x8b,
  157. 0x32, 0x43, 0x59, 0xb7, 0x8c, 0x64, 0xd2, 0xe0,
  158. 0xb4, 0xfa, 0x07, 0x25, 0xaf, 0x8e, 0xe9, 0x18,
  159. 0xd5, 0x88, 0x6f, 0x72, 0x24, 0xf1, 0xc7, 0x51,
  160. 0x23, 0x7c, 0x9c, 0x21, 0xdd, 0xdc, 0x86, 0x85,
  161. 0x90, 0x42, 0xc4, 0xaa, 0xd8, 0x05, 0x01, 0x12,
  162. 0xa3, 0x5f, 0xf9, 0xd0, 0x91, 0x58, 0x27, 0xb9,
  163. 0x38, 0x13, 0xb3, 0x33, 0xbb, 0x70, 0x89, 0xa7,
  164. 0xb6, 0x22, 0x92, 0x20, 0x49, 0xff, 0x78, 0x7a,
  165. 0x8f, 0xf8, 0x80, 0x17, 0xda, 0x31, 0xc6, 0xb8,
  166. 0xc3, 0xb0, 0x77, 0x11, 0xcb, 0xfc, 0xd6, 0x3a
  167. };
  168. /*
  169. * modular multiplication tables based on:
  170. *
  171. * Xtime2[x] = (x & 0x80 ? 0x1b : 0) ^ (x + x)
  172. * Xtime3[x] = x^Xtime2[x];
  173. */
  174. static const u8 x_time_9[256] = {
  175. 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f,
  176. 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77,
  177. 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf,
  178. 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7,
  179. 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04,
  180. 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c,
  181. 0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94,
  182. 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc,
  183. 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49,
  184. 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01,
  185. 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9,
  186. 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91,
  187. 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72,
  188. 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a,
  189. 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2,
  190. 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa,
  191. 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3,
  192. 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b,
  193. 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43,
  194. 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b,
  195. 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8,
  196. 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0,
  197. 0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78,
  198. 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30,
  199. 0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5,
  200. 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed,
  201. 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35,
  202. 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d,
  203. 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e,
  204. 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6,
  205. 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e,
  206. 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46
  207. };
  208. static const u8 x_time_b[256] = {
  209. 0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31,
  210. 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69,
  211. 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81,
  212. 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9,
  213. 0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a,
  214. 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12,
  215. 0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa,
  216. 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2,
  217. 0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7,
  218. 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f,
  219. 0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61, 0x7c, 0x77,
  220. 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f,
  221. 0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc,
  222. 0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4,
  223. 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c,
  224. 0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54,
  225. 0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6,
  226. 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e,
  227. 0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76,
  228. 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38, 0x25, 0x2e,
  229. 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd,
  230. 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5,
  231. 0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d,
  232. 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55,
  233. 0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30,
  234. 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68,
  235. 0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80,
  236. 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8,
  237. 0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d, 0x40, 0x4b,
  238. 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13,
  239. 0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb,
  240. 0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3
  241. };
  242. static const u8 x_time_d[256] = {
  243. 0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23,
  244. 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b,
  245. 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3,
  246. 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b,
  247. 0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98,
  248. 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0,
  249. 0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48,
  250. 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20,
  251. 0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e,
  252. 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26,
  253. 0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84, 0x93, 0x9e,
  254. 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6,
  255. 0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5,
  256. 0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d,
  257. 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25,
  258. 0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d,
  259. 0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9,
  260. 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91,
  261. 0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29,
  262. 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b, 0x4c, 0x41,
  263. 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42,
  264. 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a,
  265. 0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92,
  266. 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa,
  267. 0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94,
  268. 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc,
  269. 0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44,
  270. 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c,
  271. 0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35, 0x22, 0x2f,
  272. 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47,
  273. 0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff,
  274. 0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97
  275. };
  276. static const u8 x_time_e[256] = {
  277. 0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a,
  278. 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a,
  279. 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca,
  280. 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba,
  281. 0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1,
  282. 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81,
  283. 0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11,
  284. 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61,
  285. 0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87,
  286. 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7,
  287. 0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b, 0x69, 0x67,
  288. 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17,
  289. 0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c,
  290. 0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c,
  291. 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc,
  292. 0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc,
  293. 0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b,
  294. 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b,
  295. 0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b,
  296. 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7, 0xf5, 0xfb,
  297. 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0,
  298. 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0,
  299. 0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50,
  300. 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20,
  301. 0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6,
  302. 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6,
  303. 0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26,
  304. 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56,
  305. 0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01, 0x13, 0x1d,
  306. 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d,
  307. 0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd,
  308. 0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d
  309. };
  310. /*
  311. * Exchanges columns in each of 4 rows
  312. * row0 - unchanged, row1- shifted left 1,
  313. * row2 - shifted left 2 and row3 - shifted left 3
  314. */
  315. static void shift_rows(u8 *state)
  316. {
  317. u8 tmp;
  318. /* just substitute row 0 */
  319. state[0] = sbox[state[0]];
  320. state[4] = sbox[state[4]];
  321. state[8] = sbox[state[8]];
  322. state[12] = sbox[state[12]];
  323. /* rotate row 1 */
  324. tmp = sbox[state[1]];
  325. state[1] = sbox[state[5]];
  326. state[5] = sbox[state[9]];
  327. state[9] = sbox[state[13]];
  328. state[13] = tmp;
  329. /* rotate row 2 */
  330. tmp = sbox[state[2]];
  331. state[2] = sbox[state[10]];
  332. state[10] = tmp;
  333. tmp = sbox[state[6]];
  334. state[6] = sbox[state[14]];
  335. state[14] = tmp;
  336. /* rotate row 3 */
  337. tmp = sbox[state[15]];
  338. state[15] = sbox[state[11]];
  339. state[11] = sbox[state[7]];
  340. state[7] = sbox[state[3]];
  341. state[3] = tmp;
  342. }
  343. /*
  344. * restores columns in each of 4 rows
  345. * row0 - unchanged, row1- shifted right 1,
  346. * row2 - shifted right 2 and row3 - shifted right 3
  347. */
  348. static void inv_shift_rows(u8 *state)
  349. {
  350. u8 tmp;
  351. /* restore row 0 */
  352. state[0] = inv_sbox[state[0]];
  353. state[4] = inv_sbox[state[4]];
  354. state[8] = inv_sbox[state[8]];
  355. state[12] = inv_sbox[state[12]];
  356. /* restore row 1 */
  357. tmp = inv_sbox[state[13]];
  358. state[13] = inv_sbox[state[9]];
  359. state[9] = inv_sbox[state[5]];
  360. state[5] = inv_sbox[state[1]];
  361. state[1] = tmp;
  362. /* restore row 2 */
  363. tmp = inv_sbox[state[2]];
  364. state[2] = inv_sbox[state[10]];
  365. state[10] = tmp;
  366. tmp = inv_sbox[state[6]];
  367. state[6] = inv_sbox[state[14]];
  368. state[14] = tmp;
  369. /* restore row 3 */
  370. tmp = inv_sbox[state[3]];
  371. state[3] = inv_sbox[state[7]];
  372. state[7] = inv_sbox[state[11]];
  373. state[11] = inv_sbox[state[15]];
  374. state[15] = tmp;
  375. }
  376. /* recombine and mix each row in a column */
  377. static void mix_sub_columns(u8 *state)
  378. {
  379. u8 tmp[4 * AES_STATECOLS];
  380. /* mixing column 0 */
  381. tmp[0] = x2_sbox[state[0]] ^ x3_sbox[state[5]] ^
  382. sbox[state[10]] ^ sbox[state[15]];
  383. tmp[1] = sbox[state[0]] ^ x2_sbox[state[5]] ^
  384. x3_sbox[state[10]] ^ sbox[state[15]];
  385. tmp[2] = sbox[state[0]] ^ sbox[state[5]] ^
  386. x2_sbox[state[10]] ^ x3_sbox[state[15]];
  387. tmp[3] = x3_sbox[state[0]] ^ sbox[state[5]] ^
  388. sbox[state[10]] ^ x2_sbox[state[15]];
  389. /* mixing column 1 */
  390. tmp[4] = x2_sbox[state[4]] ^ x3_sbox[state[9]] ^
  391. sbox[state[14]] ^ sbox[state[3]];
  392. tmp[5] = sbox[state[4]] ^ x2_sbox[state[9]] ^
  393. x3_sbox[state[14]] ^ sbox[state[3]];
  394. tmp[6] = sbox[state[4]] ^ sbox[state[9]] ^
  395. x2_sbox[state[14]] ^ x3_sbox[state[3]];
  396. tmp[7] = x3_sbox[state[4]] ^ sbox[state[9]] ^
  397. sbox[state[14]] ^ x2_sbox[state[3]];
  398. /* mixing column 2 */
  399. tmp[8] = x2_sbox[state[8]] ^ x3_sbox[state[13]] ^
  400. sbox[state[2]] ^ sbox[state[7]];
  401. tmp[9] = sbox[state[8]] ^ x2_sbox[state[13]] ^
  402. x3_sbox[state[2]] ^ sbox[state[7]];
  403. tmp[10] = sbox[state[8]] ^ sbox[state[13]] ^
  404. x2_sbox[state[2]] ^ x3_sbox[state[7]];
  405. tmp[11] = x3_sbox[state[8]] ^ sbox[state[13]] ^
  406. sbox[state[2]] ^ x2_sbox[state[7]];
  407. /* mixing column 3 */
  408. tmp[12] = x2_sbox[state[12]] ^ x3_sbox[state[1]] ^
  409. sbox[state[6]] ^ sbox[state[11]];
  410. tmp[13] = sbox[state[12]] ^ x2_sbox[state[1]] ^
  411. x3_sbox[state[6]] ^ sbox[state[11]];
  412. tmp[14] = sbox[state[12]] ^ sbox[state[1]] ^
  413. x2_sbox[state[6]] ^ x3_sbox[state[11]];
  414. tmp[15] = x3_sbox[state[12]] ^ sbox[state[1]] ^
  415. sbox[state[6]] ^ x2_sbox[state[11]];
  416. memcpy(state, tmp, sizeof(tmp));
  417. }
  418. /* restore and un-mix each row in a column */
  419. static void inv_mix_sub_columns(u8 *state)
  420. {
  421. u8 tmp[4 * AES_STATECOLS];
  422. int i;
  423. /* restore column 0 */
  424. tmp[0] = x_time_e[state[0]] ^ x_time_b[state[1]] ^
  425. x_time_d[state[2]] ^ x_time_9[state[3]];
  426. tmp[5] = x_time_9[state[0]] ^ x_time_e[state[1]] ^
  427. x_time_b[state[2]] ^ x_time_d[state[3]];
  428. tmp[10] = x_time_d[state[0]] ^ x_time_9[state[1]] ^
  429. x_time_e[state[2]] ^ x_time_b[state[3]];
  430. tmp[15] = x_time_b[state[0]] ^ x_time_d[state[1]] ^
  431. x_time_9[state[2]] ^ x_time_e[state[3]];
  432. /* restore column 1 */
  433. tmp[4] = x_time_e[state[4]] ^ x_time_b[state[5]] ^
  434. x_time_d[state[6]] ^ x_time_9[state[7]];
  435. tmp[9] = x_time_9[state[4]] ^ x_time_e[state[5]] ^
  436. x_time_b[state[6]] ^ x_time_d[state[7]];
  437. tmp[14] = x_time_d[state[4]] ^ x_time_9[state[5]] ^
  438. x_time_e[state[6]] ^ x_time_b[state[7]];
  439. tmp[3] = x_time_b[state[4]] ^ x_time_d[state[5]] ^
  440. x_time_9[state[6]] ^ x_time_e[state[7]];
  441. /* restore column 2 */
  442. tmp[8] = x_time_e[state[8]] ^ x_time_b[state[9]] ^
  443. x_time_d[state[10]] ^ x_time_9[state[11]];
  444. tmp[13] = x_time_9[state[8]] ^ x_time_e[state[9]] ^
  445. x_time_b[state[10]] ^ x_time_d[state[11]];
  446. tmp[2] = x_time_d[state[8]] ^ x_time_9[state[9]] ^
  447. x_time_e[state[10]] ^ x_time_b[state[11]];
  448. tmp[7] = x_time_b[state[8]] ^ x_time_d[state[9]] ^
  449. x_time_9[state[10]] ^ x_time_e[state[11]];
  450. /* restore column 3 */
  451. tmp[12] = x_time_e[state[12]] ^ x_time_b[state[13]] ^
  452. x_time_d[state[14]] ^ x_time_9[state[15]];
  453. tmp[1] = x_time_9[state[12]] ^ x_time_e[state[13]] ^
  454. x_time_b[state[14]] ^ x_time_d[state[15]];
  455. tmp[6] = x_time_d[state[12]] ^ x_time_9[state[13]] ^
  456. x_time_e[state[14]] ^ x_time_b[state[15]];
  457. tmp[11] = x_time_b[state[12]] ^ x_time_d[state[13]] ^
  458. x_time_9[state[14]] ^ x_time_e[state[15]];
  459. for (i = 0; i < 4 * AES_STATECOLS; i++)
  460. state[i] = inv_sbox[tmp[i]];
  461. }
  462. /*
  463. * encrypt/decrypt columns of the key
  464. * n.b. you can replace this with byte-wise xor if you wish.
  465. */
  466. static void add_round_key(u32 *state, u32 *key)
  467. {
  468. int idx;
  469. for (idx = 0; idx < 4; idx++)
  470. state[idx] ^= key[idx];
  471. }
  472. static u8 rcon[11] = {
  473. 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
  474. };
  475. /* produce AES_STATECOLS bytes for each round */
  476. void aes_expand_key(u8 *key, u8 *expkey)
  477. {
  478. u8 tmp0, tmp1, tmp2, tmp3, tmp4;
  479. u32 idx;
  480. memcpy(expkey, key, AES_KEYCOLS * 4);
  481. for (idx = AES_KEYCOLS; idx < AES_STATECOLS * (AES_ROUNDS + 1); idx++) {
  482. tmp0 = expkey[4*idx - 4];
  483. tmp1 = expkey[4*idx - 3];
  484. tmp2 = expkey[4*idx - 2];
  485. tmp3 = expkey[4*idx - 1];
  486. if (!(idx % AES_KEYCOLS)) {
  487. tmp4 = tmp3;
  488. tmp3 = sbox[tmp0];
  489. tmp0 = sbox[tmp1] ^ rcon[idx / AES_KEYCOLS];
  490. tmp1 = sbox[tmp2];
  491. tmp2 = sbox[tmp4];
  492. } else if ((AES_KEYCOLS > 6) && (idx % AES_KEYCOLS == 4)) {
  493. tmp0 = sbox[tmp0];
  494. tmp1 = sbox[tmp1];
  495. tmp2 = sbox[tmp2];
  496. tmp3 = sbox[tmp3];
  497. }
  498. expkey[4*idx+0] = expkey[4*idx - 4*AES_KEYCOLS + 0] ^ tmp0;
  499. expkey[4*idx+1] = expkey[4*idx - 4*AES_KEYCOLS + 1] ^ tmp1;
  500. expkey[4*idx+2] = expkey[4*idx - 4*AES_KEYCOLS + 2] ^ tmp2;
  501. expkey[4*idx+3] = expkey[4*idx - 4*AES_KEYCOLS + 3] ^ tmp3;
  502. }
  503. }
  504. /* encrypt one 128 bit block */
  505. void aes_encrypt(u8 *in, u8 *expkey, u8 *out)
  506. {
  507. u8 state[AES_STATECOLS * 4];
  508. u32 round;
  509. memcpy(state, in, AES_STATECOLS * 4);
  510. add_round_key((u32 *)state, (u32 *)expkey);
  511. for (round = 1; round < AES_ROUNDS + 1; round++) {
  512. if (round < AES_ROUNDS)
  513. mix_sub_columns(state);
  514. else
  515. shift_rows(state);
  516. add_round_key((u32 *)state,
  517. (u32 *)expkey + round * AES_STATECOLS);
  518. }
  519. memcpy(out, state, sizeof(state));
  520. }
  521. void aes_decrypt(u8 *in, u8 *expkey, u8 *out)
  522. {
  523. u8 state[AES_STATECOLS * 4];
  524. int round;
  525. memcpy(state, in, sizeof(state));
  526. add_round_key((u32 *)state,
  527. (u32 *)expkey + AES_ROUNDS * AES_STATECOLS);
  528. inv_shift_rows(state);
  529. for (round = AES_ROUNDS; round--; ) {
  530. add_round_key((u32 *)state,
  531. (u32 *)expkey + round * AES_STATECOLS);
  532. if (round)
  533. inv_mix_sub_columns(state);
  534. }
  535. memcpy(out, state, sizeof(state));
  536. }
  537. static void debug_print_vector(char *name, u32 num_bytes, u8 *data)
  538. {
  539. #ifdef DEBUG
  540. printf("%s [%d] @0x%08x", name, num_bytes, (u32)data);
  541. print_buffer(0, data, 1, num_bytes, 16);
  542. #endif
  543. }
  544. void aes_apply_cbc_chain_data(u8 *cbc_chain_data, u8 *src, u8 *dst)
  545. {
  546. int i;
  547. for (i = 0; i < AES_KEY_LENGTH; i++)
  548. *dst++ = *src++ ^ *cbc_chain_data++;
  549. }
  550. void aes_cbc_encrypt_blocks(u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
  551. u32 num_aes_blocks)
  552. {
  553. u8 tmp_data[AES_KEY_LENGTH];
  554. u8 *cbc_chain_data = iv;
  555. u32 i;
  556. for (i = 0; i < num_aes_blocks; i++) {
  557. debug("encrypt_object: block %d of %d\n", i, num_aes_blocks);
  558. debug_print_vector("AES Src", AES_KEY_LENGTH, src);
  559. /* Apply the chain data */
  560. aes_apply_cbc_chain_data(cbc_chain_data, src, tmp_data);
  561. debug_print_vector("AES Xor", AES_KEY_LENGTH, tmp_data);
  562. /* Encrypt the AES block */
  563. aes_encrypt(tmp_data, key_exp, dst);
  564. debug_print_vector("AES Dst", AES_KEY_LENGTH, dst);
  565. /* Update pointers for next loop. */
  566. cbc_chain_data = dst;
  567. src += AES_KEY_LENGTH;
  568. dst += AES_KEY_LENGTH;
  569. }
  570. }
  571. void aes_cbc_decrypt_blocks(u8 *key_exp, u8 *iv, u8 *src, u8 *dst,
  572. u32 num_aes_blocks)
  573. {
  574. u8 tmp_data[AES_KEY_LENGTH], tmp_block[AES_KEY_LENGTH];
  575. /* Convenient array of 0's for IV */
  576. u8 cbc_chain_data[AES_KEY_LENGTH];
  577. u32 i;
  578. memcpy(cbc_chain_data, iv, AES_KEY_LENGTH);
  579. for (i = 0; i < num_aes_blocks; i++) {
  580. debug("encrypt_object: block %d of %d\n", i, num_aes_blocks);
  581. debug_print_vector("AES Src", AES_KEY_LENGTH, src);
  582. memcpy(tmp_block, src, AES_KEY_LENGTH);
  583. /* Decrypt the AES block */
  584. aes_decrypt(src, key_exp, tmp_data);
  585. debug_print_vector("AES Xor", AES_KEY_LENGTH, tmp_data);
  586. /* Apply the chain data */
  587. aes_apply_cbc_chain_data(cbc_chain_data, tmp_data, dst);
  588. debug_print_vector("AES Dst", AES_KEY_LENGTH, dst);
  589. /* Update pointers for next loop. */
  590. memcpy(cbc_chain_data, tmp_block, AES_KEY_LENGTH);
  591. src += AES_KEY_LENGTH;
  592. dst += AES_KEY_LENGTH;
  593. }
  594. }