+/** @file\r
+ Core Primitive Implementation of the Advanced Encryption Standard (AES) algorithm.\r
+ Refer to FIPS PUB 197 ("Advanced Encryption Standard (AES)") for detailed algorithm \r
+ description of AES. \r
+\r
+Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include "AesCore.h"\r
+\r
+//\r
+// Number of columns (32-bit words) comprising the State.\r
+// AES_NB is a constant (value = 4) for NIST FIPS-197.\r
+//\r
+#define AES_NB 4\r
+\r
+//\r
+// Pre-computed AES Forward Table: AES_ETABLE[t] = AES_SBOX[t].[02, 01, 01, 03]\r
+// This is to speed up execution of the cipher by combining SubBytes and\r
+// ShiftRows with MixColumns steps and transforming them into table lookups.\r
+//\r
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 AES_FTABLE[] = {\r
+ 0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, \r
+ 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d,\r
+ 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, \r
+ 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,\r
+ 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, \r
+ 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a,\r
+ 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, \r
+ 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,\r
+ 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, \r
+ 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d,\r
+ 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, \r
+ 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,\r
+ 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, \r
+ 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c,\r
+ 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, \r
+ 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,\r
+ 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, \r
+ 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81,\r
+ 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, \r
+ 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,\r
+ 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, \r
+ 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f,\r
+ 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, \r
+ 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,\r
+ 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, \r
+ 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c,\r
+ 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, \r
+ 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,\r
+ 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, \r
+ 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7,\r
+ 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, \r
+ 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,\r
+ 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, \r
+ 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21,\r
+ 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, \r
+ 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,\r
+ 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, \r
+ 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133,\r
+ 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, \r
+ 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,\r
+ 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, \r
+ 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11,\r
+ 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a\r
+};\r
+\r
+//\r
+// Pre-computed AES Reverse Table: AES_DTABLE[t] = AES_INV_SBOX[t].[0e, 09, 0d, 0b]\r
+//\r
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 AES_RTABLE[] = {\r
+ 0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, \r
+ 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25,\r
+ 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, \r
+ 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6,\r
+ 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, \r
+ 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd,\r
+ 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, \r
+ 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94,\r
+ 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, \r
+ 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5,\r
+ 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, \r
+ 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a,\r
+ 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, \r
+ 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46,\r
+ 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, \r
+ 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb,\r
+ 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, \r
+ 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927,\r
+ 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, \r
+ 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16,\r
+ 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, \r
+ 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd,\r
+ 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, \r
+ 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120,\r
+ 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, \r
+ 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422,\r
+ 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, \r
+ 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4,\r
+ 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, \r
+ 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3,\r
+ 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, \r
+ 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6,\r
+ 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, \r
+ 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815,\r
+ 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, \r
+ 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f,\r
+ 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, \r
+ 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89,\r
+ 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, \r
+ 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86,\r
+ 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, \r
+ 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190,\r
+ 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742\r
+};\r
+\r
+//\r
+// AES Inverse S-Box (Defined in sec 5.3.2 of FIPS PUB 197).\r
+//\r
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT8 AES_INV_SBOX[256] = {\r
+ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,\r
+ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,\r
+ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,\r
+ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,\r
+ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,\r
+ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,\r
+ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,\r
+ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,\r
+ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,\r
+ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,\r
+ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,\r
+ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,\r
+ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,\r
+ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,\r
+ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,\r
+ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d\r
+};\r
+\r
+//\r
+// Round constant word array used in AES key expansion.\r
+//\r
+GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 Rcon[] = {\r
+ 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,\r
+ 0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000\r
+};\r
+\r
+//\r
+// Rotates x right n bits (circular right shift operation)\r
+//\r
+#define ROTATE_RIGHT32(x, n) (((x) >> (n)) | ((x) << (32-(n))))\r
+\r
+//\r
+// Loading & Storing 32-bit words in big-endian format: y[3..0] --> x; x --> y[3..0];\r
+//\r
+#define LOAD32H(x, y) { x = ((UINT32)((y)[0] & 0xFF) << 24) | ((UINT32)((y)[1] & 0xFF) << 16) | \\r
+ ((UINT32)((y)[2] & 0xFF) << 8) | ((UINT32)((y)[3] & 0xFF)); }\r
+#define STORE32H(x, y) { (y)[0] = (UINT8)(((x) >> 24) & 0xFF); (y)[1] = (UINT8)(((x) >> 16) & 0xFF); \\r
+ (y)[2] = (UINT8)(((x) >> 8) & 0xFF); (y)[3] = (UINT8)((x) & 0xFF); }\r
+\r
+//\r
+// Wrap macros for AES forward and reverse tables lookups\r
+//\r
+#define AES_FT0(x) AES_FTABLE[x]\r
+#define AES_FT1(x) ROTATE_RIGHT32(AES_FTABLE[x], 8)\r
+#define AES_FT2(x) ROTATE_RIGHT32(AES_FTABLE[x], 16)\r
+#define AES_FT3(x) ROTATE_RIGHT32(AES_FTABLE[x], 24)\r
+\r
+#define AES_RT0(x) AES_RTABLE[x]\r
+#define AES_RT1(x) ROTATE_RIGHT32(AES_RTABLE[x], 8)\r
+#define AES_RT2(x) ROTATE_RIGHT32(AES_RTABLE[x], 16)\r
+#define AES_RT3(x) ROTATE_RIGHT32(AES_RTABLE[x], 24)\r
+\r
+///\r
+/// AES Key Schedule which is expanded from symmetric key [Size 60 = 4 * ((Max AES Round, 14) + 1)].\r
+///\r
+typedef struct {\r
+ UINTN Nk; // Number of Cipher Key (in 32-bit words);\r
+ UINT32 eKey[60]; // Expanded AES encryption key\r
+ UINT32 dKey[60]; // Expanded AES decryption key (Not used here)\r
+} AES_KEY;\r
+\r
+/**\r
+ AES Key Expansion. \r
+ This function expands the cipher key into encryption schedule.\r
+\r
+ @param[in] Key AES symmetric key buffer.\r
+ @param[in] KeyLenInBits Key length in bits (128, 192, or 256).\r
+ @param[out] AesKey Expanded AES Key schedule for encryption.\r
+\r
+ @retval EFI_SUCCESS AES key expansion succeeded.\r
+ @retval EFI_INVALID_PARAMETER Unsupported key length.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+AesExpandKey (\r
+ IN UINT8 *Key,\r
+ IN UINTN KeyLenInBits,\r
+ OUT AES_KEY *AesKey\r
+ )\r
+{\r
+ UINTN Nk, Nr, NW;\r
+ UINTN i, j, k;\r
+ UINT32 *Ek;\r
+ UINT32 Temp;\r
+\r
+ //\r
+ // Nk - Number of 32-bit words comprising the cipher key. (Nk = 4, 6 or 8)\r
+ // Nr - Number of rounds. (Nr = 10, 12, or 14), which is dependent on the key size.\r
+ //\r
+ Nk = KeyLenInBits >> 5;\r
+ if (Nk != 4 && Nk != 6 && Nk != 8) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+ Nr = Nk + 6;\r
+ NW = AES_NB * (Nr + 1); // Key Expansion generates a total of Nb * (Nr + 1) words\r
+ AesKey->Nk = Nk;\r
+\r
+ //\r
+ // Load initial symmetric AES key;\r
+ // Note that AES was designed on big-endian systems.\r
+ //\r
+ Ek = AesKey->eKey;\r
+ for (i = j = 0; i < Nk; i++, j+=4) {\r
+ LOAD32H (Ek[i], Key + j);\r
+ }\r
+ \r
+ //\r
+ // Initialize the encryption key scheduler\r
+ //\r
+ for (j = Nk, k = 0; j < NW; j+=Nk, k++) {\r
+ Temp = Ek[j - 1];\r
+ Ek[j] = Ek[j - Nk] ^ (AES_FT2((Temp >> 16) & 0xFF) & 0xFF000000) ^\r
+ (AES_FT3((Temp >> 8) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0((Temp) & 0xFF) & 0x0000FF00) ^\r
+ (AES_FT1((Temp >> 24) & 0xFF) & 0x000000FF) ^\r
+ Rcon[k];\r
+ if (Nk <= 6) {\r
+ //\r
+ // If AES Cipher Key is 128 or 192 bits\r
+ //\r
+ for (i = 1; i < Nk && (i + j) < NW; i++) {\r
+ Ek [i + j] = Ek [i + j - Nk] ^ Ek[i + j - 1];\r
+ }\r
+ } else {\r
+ //\r
+ // Different routine for key expansion If Cipher Key is 256 bits, \r
+ //\r
+ for (i = 1; i < 4 && (i + j) < NW; i++) {\r
+ Ek [i + j] = Ek[i + j - Nk] ^ Ek[i + j - 1];\r
+ }\r
+ if (j + 4 < NW) {\r
+ Temp = Ek[j + 3];\r
+ Ek[j + 4] = Ek[j + 4 - Nk] ^ (AES_FT2((Temp >> 24) & 0xFF) & 0xFF000000) ^\r
+ (AES_FT3((Temp >> 16) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0((Temp >> 8) & 0xFF) & 0x0000FF00) ^\r
+ (AES_FT1((Temp) & 0xFF) & 0x000000FF);\r
+ }\r
+ \r
+ for (i = 5; i < Nk && (i + j) < NW; i++) {\r
+ Ek[i + j] = Ek[i + j - Nk] ^ Ek[i + j - 1];\r
+ }\r
+ }\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Encrypts one single block data (128 bits) with AES algorithm.\r
+\r
+ @param[in] Key AES symmetric key buffer.\r
+ @param[in] InData One block of input plaintext to be encrypted.\r
+ @param[out] OutData Encrypted output ciphertext.\r
+\r
+ @retval EFI_SUCCESS AES Block Encryption succeeded.\r
+ @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+AesEncrypt (\r
+ IN UINT8 *Key,\r
+ IN UINT8 *InData,\r
+ OUT UINT8 *OutData\r
+ )\r
+{\r
+ AES_KEY AesKey;\r
+ UINTN Nr;\r
+ UINT32 *Ek, s[4], t[4], *x, *y, *Temp;\r
+ UINTN Index, k, Round;\r
+\r
+ if ((Key == NULL) || (InData == NULL) || (OutData == NULL)) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // Expands AES Key for encryption.\r
+ //\r
+ AesExpandKey (Key, 128, &AesKey);\r
+\r
+ Nr = AesKey.Nk + 6;\r
+ Ek = AesKey.eKey;\r
+\r
+ //\r
+ // Initialize the cipher State array with the initial round key\r
+ //\r
+ for (Index = 0; Index < AES_NB; Index++) {\r
+ LOAD32H (s[Index], InData + 4 * Index);\r
+ s[Index] ^= Ek[Index];\r
+ }\r
+\r
+ k = AES_NB;\r
+ x = s; \r
+ y = t;\r
+ //\r
+ // AES Cipher transformation rounds (Nr - 1 rounds), in which SubBytes(), \r
+ // ShiftRows() and MixColumns() operations were combined by a sequence of \r
+ // table lookups to speed up the execution.\r
+ //\r
+ for (Round = 1; Round < Nr; Round++) {\r
+ y[0] = AES_FT0 ((x[0] >> 24) ) ^ AES_FT1 ((x[1] >> 16) & 0xFF) ^\r
+ AES_FT2 ((x[2] >> 8) & 0xFF) ^ AES_FT3 ((x[3] ) & 0xFF) ^ Ek[k];\r
+ y[1] = AES_FT0 ((x[1] >> 24) ) ^ AES_FT1 ((x[2] >> 16) & 0xFF) ^\r
+ AES_FT2 ((x[3] >> 8) & 0xFF) ^ AES_FT3 ((x[0] ) & 0xFF) ^ Ek[k + 1];\r
+ y[2] = AES_FT0 ((x[2] >> 24) ) ^ AES_FT1 ((x[3] >> 16) & 0xFF) ^\r
+ AES_FT2 ((x[0] >> 8) & 0xFF) ^ AES_FT3 ((x[1] ) & 0xFF) ^ Ek[k + 2];\r
+ y[3] = AES_FT0 ((x[3] >> 24) ) ^ AES_FT1 ((x[0] >> 16) & 0xFF) ^\r
+ AES_FT2 ((x[1] >> 8) & 0xFF) ^ AES_FT3 ((x[2] ) & 0xFF) ^ Ek[k + 3];\r
+\r
+ k += 4;\r
+ Temp = x; x = y; y = Temp; \r
+ }\r
+\r
+ //\r
+ // Apply the final round, which does not include MixColumns() transformation\r
+ //\r
+ y[0] = (AES_FT2 ((x[0] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((x[1] >> 16) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0 ((x[2] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((x[3] ) & 0xFF) & 0x000000FF) ^\r
+ Ek[k];\r
+ y[1] = (AES_FT2 ((x[1] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((x[2] >> 16) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0 ((x[3] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((x[0] ) & 0xFF) & 0x000000FF) ^\r
+ Ek[k + 1];\r
+ y[2] = (AES_FT2 ((x[2] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((x[3] >> 16) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0 ((x[0] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((x[1] ) & 0xFF) & 0x000000FF) ^\r
+ Ek[k + 2];\r
+ y[3] = (AES_FT2 ((x[3] >> 24) ) & 0xFF000000) ^ (AES_FT3 ((x[0] >> 16) & 0xFF) & 0x00FF0000) ^\r
+ (AES_FT0 ((x[1] >> 8) & 0xFF) & 0x0000FF00) ^ (AES_FT1 ((x[2] ) & 0xFF) & 0x000000FF) ^\r
+ Ek[k + 3];\r
+\r
+ //\r
+ // Output the transformed result;\r
+ //\r
+ for (Index = 0; Index < AES_NB; Index++) {\r
+ STORE32H (y[Index], OutData + 4 * Index);\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}
\ No newline at end of file
projects / mirror_edk2.git / commitdiff