AMPS:AES模块源码解读
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AES(Advanced Encryption Standard，高级加密标准)是一个对称密钥加密算法，密钥长度则可以是128，192或256比特。
算法思路(详细信息请见维基百科)：
AES加密过程是在一个4×4的字节矩阵上运作，这个矩阵又称为“体（state）”，其初值就是一个明文区块（矩阵中一个元素大小就是明文区块中的一个Byte）。（Rijndael加密法因支持更大的区块，其矩阵行数可视情况增加）加密时，各轮AES加密循环（除最后一轮外）均包含4个步骤：
- AddRoundKey — 矩阵中的每一个字节都与该次回合金钥（round key）做XOR运算；每个子密钥由密钥生成方案产生。
- SubBytes — 通过一个非线性的替换函数，用查找表的方式把每个字节替换成对应的字节。
- ShiftRows — 将矩阵中的每个横列进行循环式移位。
- MixColumns — 为了充分混合矩阵中各个直行的操作。这个步骤使用线性转换来混合每内联的四个字节。
最后一个加密循环中省略MixColumns步骤，而以另一个AddRoundKey取代。
这个算法比较复杂，所以完全没理解，所以这个文章就不能说是解读了，贴出AMPS中AES的实现代码，有兴趣的朋友可以自己理解一下，我是没有这个兴趣了。
AMPS_AES.h
#ifndef __HEADER_AMPS_AES_H#define __HEADER_AMPS_AES_H#ifdef __cplusplusextern "C" {#endif#include "AMPS_Defines.h"//platform-independant 32-bit integer manipulation macros#define GET_UINT32(n,b,i) \{ \(n) = ( (b)[(i)] << 24 ) \| ( (b)[(i) + 1] << 16 ) \| ( (b)[(i) + 2] << 8 ) \| ( (b)[(i) + 3] ); \}#define PUT_UINT32(n,b,i) \{ \(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \(b)[(i) + 3] = (unsigned char) ( (n) ); \}typedef struct _AMPSAESContextt_AMPSAESContext;struct _AMPSAESContext{intnNoOfRounds;unsigned longulEncRoundKeys[64];unsigned longulDecRoundKeys[64];};void* AAES_Init(void* r_pvAMPSContext);void AAES_Cleanup(void* r_pvAMPSContext, void* r_pvAMPSAESContext);int AAES_SetKey(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchKey, int r_nBits);void AAES_Encrypt(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchInputBuff, unsigned int r_unInputBuffLength, unsigned char* r_puchOutputBuff);void AAES_Decrypt(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchInputBuff, unsigned int r_unInputBuffLength, unsigned char* r_puchOutputBuff);#ifdef __cplusplus}#endif#endif //__HEADER_AMPS_AES_HAMPS_AES.c
#include "AMPS_Core.h"#include "AMPS_Defines.h"#include "AMPS_MemMgt.h"#include "AMPS_AES.h"#include "AMPS_LinkList.h"void* AAES_Init(void* r_pvAMPSContext){t_AMPSAESContext* poAMPSAESContext = NULL;TRACE(MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_INFO, "Entering.\n");poAMPSAESContext = (t_AMPSAESContext*)AMPS_InternalMalloc(sizeof(t_AMPSAESContext));if(NULL == poAMPSAESContext){TRACE( MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_ERROR, "AMPS_InternalMalloc failed for poAMPSAESContext.\n");return NULL;}TRACE( MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_INFO, "Leaving.\n");return poAMPSAESContext;}void AAES_Cleanup(void* r_pvAMPSContext, void* r_pvAMPSAESContext){TRACE( MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_INFO, "Entering.\n");TRACE( MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_DEBUG, "AMPS_InternalFree called for r_pvAMPSAESContext.\n");AMPS_InternalFree(r_pvAMPSAESContext);TRACE( MD5_TRACE_ID(r_pvAMPSContext), AMPS_TRACE_LEVEL_INFO, "Leaving.\n");}/*加密时使用的置换表*///forward S-boxstatic unsigned long FSb[256] ={0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5,0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0,0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC,0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A,0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0,0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B,0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85,0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5,0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17,0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88,0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C,0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9,0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6,0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E,0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94,0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68,0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16};//forward table#define FT \\V(C6,63,63,A5), V(F8,7C,7C,84), V(EE,77,77,99), V(F6,7B,7B,8D), \V(FF,F2,F2,0D), V(D6,6B,6B,BD), V(DE,6F,6F,B1), V(91,C5,C5,54), \V(60,30,30,50), V(02,01,01,03), V(CE,67,67,A9), V(56,2B,2B,7D), \V(E7,FE,FE,19), V(B5,D7,D7,62), V(4D,AB,AB,E6), V(EC,76,76,9A), \V(8F,CA,CA,45), V(1F,82,82,9D), V(89,C9,C9,40), V(FA,7D,7D,87), \V(EF,FA,FA,15), V(B2,59,59,EB), V(8E,47,47,C9), V(FB,F0,F0,0B), \V(41,AD,AD,EC), V(B3,D4,D4,67), V(5F,A2,A2,FD), V(45,AF,AF,EA), \V(23,9C,9C,BF), V(53,A4,A4,F7), V(E4,72,72,96), V(9B,C0,C0,5B), \V(75,B7,B7,C2), V(E1,FD,FD,1C), V(3D,93,93,AE), V(4C,26,26,6A), \V(6C,36,36,5A), V(7E,3F,3F,41), V(F5,F7,F7,02), V(83,CC,CC,4F), \V(68,34,34,5C), V(51,A5,A5,F4), V(D1,E5,E5,34), V(F9,F1,F1,08), \V(E2,71,71,93), V(AB,D8,D8,73), V(62,31,31,53), V(2A,15,15,3F), \V(08,04,04,0C), V(95,C7,C7,52), V(46,23,23,65), V(9D,C3,C3,5E), \V(30,18,18,28), V(37,96,96,A1), V(0A,05,05,0F), V(2F,9A,9A,B5), \V(0E,07,07,09), V(24,12,12,36), V(1B,80,80,9B), V(DF,E2,E2,3D), \V(CD,EB,EB,26), V(4E,27,27,69), V(7F,B2,B2,CD), V(EA,75,75,9F), \V(12,09,09,1B), V(1D,83,83,9E), V(58,2C,2C,74), V(34,1A,1A,2E), \V(36,1B,1B,2D), V(DC,6E,6E,B2), V(B4,5A,5A,EE), V(5B,A0,A0,FB), \V(A4,52,52,F6), V(76,3B,3B,4D), V(B7,D6,D6,61), V(7D,B3,B3,CE), \V(52,29,29,7B), V(DD,E3,E3,3E), V(5E,2F,2F,71), V(13,84,84,97), \V(A6,53,53,F5), V(B9,D1,D1,68), V(00,00,00,00), V(C1,ED,ED,2C), \V(40,20,20,60), V(E3,FC,FC,1F), V(79,B1,B1,C8), V(B6,5B,5B,ED), \V(D4,6A,6A,BE), V(8D,CB,CB,46), V(67,BE,BE,D9), V(72,39,39,4B), \V(94,4A,4A,DE), V(98,4C,4C,D4), V(B0,58,58,E8), V(85,CF,CF,4A), \V(BB,D0,D0,6B), V(C5,EF,EF,2A), V(4F,AA,AA,E5), V(ED,FB,FB,16), \V(86,43,43,C5), V(9A,4D,4D,D7), V(66,33,33,55), V(11,85,85,94), \V(8A,45,45,CF), V(E9,F9,F9,10), V(04,02,02,06), V(FE,7F,7F,81), \V(A0,50,50,F0), V(78,3C,3C,44), V(25,9F,9F,BA), V(4B,A8,A8,E3), \V(A2,51,51,F3), V(5D,A3,A3,FE), V(80,40,40,C0), V(05,8F,8F,8A), \V(3F,92,92,AD), V(21,9D,9D,BC), V(70,38,38,48), V(F1,F5,F5,04), \V(63,BC,BC,DF), V(77,B6,B6,C1), V(AF,DA,DA,75), V(42,21,21,63), \V(20,10,10,30), V(E5,FF,FF,1A), V(FD,F3,F3,0E), V(BF,D2,D2,6D), \V(81,CD,CD,4C), V(18,0C,0C,14), V(26,13,13,35), V(C3,EC,EC,2F), \V(BE,5F,5F,E1), V(35,97,97,A2), V(88,44,44,CC), V(2E,17,17,39), \V(93,C4,C4,57), V(55,A7,A7,F2), V(FC,7E,7E,82), V(7A,3D,3D,47), \V(C8,64,64,AC), V(BA,5D,5D,E7), V(32,19,19,2B), V(E6,73,73,95), \V(C0,60,60,A0), V(19,81,81,98), V(9E,4F,4F,D1), V(A3,DC,DC,7F), \V(44,22,22,66), V(54,2A,2A,7E), V(3B,90,90,AB), V(0B,88,88,83), \V(8C,46,46,CA), V(C7,EE,EE,29), V(6B,B8,B8,D3), V(28,14,14,3C), \V(A7,DE,DE,79), V(BC,5E,5E,E2), V(16,0B,0B,1D), V(AD,DB,DB,76), \V(DB,E0,E0,3B), V(64,32,32,56), V(74,3A,3A,4E), V(14,0A,0A,1E), \V(92,49,49,DB), V(0C,06,06,0A), V(48,24,24,6C), V(B8,5C,5C,E4), \V(9F,C2,C2,5D), V(BD,D3,D3,6E), V(43,AC,AC,EF), V(C4,62,62,A6), \V(39,91,91,A8), V(31,95,95,A4), V(D3,E4,E4,37), V(F2,79,79,8B), \V(D5,E7,E7,32), V(8B,C8,C8,43), V(6E,37,37,59), V(DA,6D,6D,B7), \V(01,8D,8D,8C), V(B1,D5,D5,64), V(9C,4E,4E,D2), V(49,A9,A9,E0), \V(D8,6C,6C,B4), V(AC,56,56,FA), V(F3,F4,F4,07), V(CF,EA,EA,25), \V(CA,65,65,AF), V(F4,7A,7A,8E), V(47,AE,AE,E9), V(10,08,08,18), \V(6F,BA,BA,D5), V(F0,78,78,88), V(4A,25,25,6F), V(5C,2E,2E,72), \V(38,1C,1C,24), V(57,A6,A6,F1), V(73,B4,B4,C7), V(97,C6,C6,51), \V(CB,E8,E8,23), V(A1,DD,DD,7C), V(E8,74,74,9C), V(3E,1F,1F,21), \V(96,4B,4B,DD), V(61,BD,BD,DC), V(0D,8B,8B,86), V(0F,8A,8A,85), \V(E0,70,70,90), V(7C,3E,3E,42), V(71,B5,B5,C4), V(CC,66,66,AA), \V(90,48,48,D8), V(06,03,03,05), V(F7,F6,F6,01), V(1C,0E,0E,12), \V(C2,61,61,A3), V(6A,35,35,5F), V(AE,57,57,F9), V(69,B9,B9,D0), \V(17,86,86,91), V(99,C1,C1,58), V(3A,1D,1D,27), V(27,9E,9E,B9), \V(D9,E1,E1,38), V(EB,F8,F8,13), V(2B,98,98,B3), V(22,11,11,33), \V(D2,69,69,BB), V(A9,D9,D9,70), V(07,8E,8E,89), V(33,94,94,A7), \V(2D,9B,9B,B6), V(3C,1E,1E,22), V(15,87,87,92), V(C9,E9,E9,20), \V(87,CE,CE,49), V(AA,55,55,FF), V(50,28,28,78), V(A5,DF,DF,7A), \V(03,8C,8C,8F), V(59,A1,A1,F8), V(09,89,89,80), V(1A,0D,0D,17), \V(65,BF,BF,DA), V(D7,E6,E6,31), V(84,42,42,C6), V(D0,68,68,B8), \V(82,41,41,C3), V(29,99,99,B0), V(5A,2D,2D,77), V(1E,0F,0F,11), \V(7B,B0,B0,CB), V(A8,54,54,FC), V(6D,BB,BB,D6), V(2C,16,16,3A)#define V(a,b,c,d) 0x##a##b##c##dstatic unsigned long FT0[256] = { FT };#undef V#define V(a,b,c,d) 0x##d##a##b##cstatic unsigned long FT1[256] = { FT };#undef V#define V(a,b,c,d) 0x##c##d##a##bstatic unsigned long FT2[256] = { FT };#undef V#define V(a,b,c,d) 0x##b##c##d##astatic unsigned long FT3[256] = { FT };#undef V/*解密时使用的逆置换表*///reverse S-boxstatic unsigned long RSb[256] ={0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38,0xBF, 0x40, 0xA3, 0x9E, 0x81, 0xF3, 0xD7, 0xFB,0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87,0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB,0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D,0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E,0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2,0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25,0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16,0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92,0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA,0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84,0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A,0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06,0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02,0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B,0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA,0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73,0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85,0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E,0x47, 0xF1, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89,0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B,0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20,0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4,0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31,0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F,0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D,0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF,0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0,0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61,0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26,0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D};//reverse table#define RT \\V(51,F4,A7,50), V(7E,41,65,53), V(1A,17,A4,C3), V(3A,27,5E,96), \V(3B,AB,6B,CB), V(1F,9D,45,F1), V(AC,FA,58,AB), V(4B,E3,03,93), \V(20,30,FA,55), V(AD,76,6D,F6), V(88,CC,76,91), V(F5,02,4C,25), \V(4F,E5,D7,FC), V(C5,2A,CB,D7), V(26,35,44,80), V(B5,62,A3,8F), \V(DE,B1,5A,49), V(25,BA,1B,67), V(45,EA,0E,98), V(5D,FE,C0,E1), \V(C3,2F,75,02), V(81,4C,F0,12), V(8D,46,97,A3), V(6B,D3,F9,C6), \V(03,8F,5F,E7), V(15,92,9C,95), V(BF,6D,7A,EB), V(95,52,59,DA), \V(D4,BE,83,2D), V(58,74,21,D3), V(49,E0,69,29), V(8E,C9,C8,44), \V(75,C2,89,6A), V(F4,8E,79,78), V(99,58,3E,6B), V(27,B9,71,DD), \V(BE,E1,4F,B6), V(F0,88,AD,17), V(C9,20,AC,66), V(7D,CE,3A,B4), \V(63,DF,4A,18), V(E5,1A,31,82), V(97,51,33,60), V(62,53,7F,45), \V(B1,64,77,E0), V(BB,6B,AE,84), V(FE,81,A0,1C), V(F9,08,2B,94), \V(70,48,68,58), V(8F,45,FD,19), V(94,DE,6C,87), V(52,7B,F8,B7), \V(AB,73,D3,23), V(72,4B,02,E2), V(E3,1F,8F,57), V(66,55,AB,2A), \V(B2,EB,28,07), V(2F,B5,C2,03), V(86,C5,7B,9A), V(D3,37,08,A5), \V(30,28,87,F2), V(23,BF,A5,B2), V(02,03,6A,BA), V(ED,16,82,5C), \V(8A,CF,1C,2B), V(A7,79,B4,92), V(F3,07,F2,F0), V(4E,69,E2,A1), \V(65,DA,F4,CD), V(06,05,BE,D5), V(D1,34,62,1F), V(C4,A6,FE,8A), \V(34,2E,53,9D), V(A2,F3,55,A0), V(05,8A,E1,32), V(A4,F6,EB,75), \V(0B,83,EC,39), V(40,60,EF,AA), V(5E,71,9F,06), V(BD,6E,10,51), \V(3E,21,8A,F9), V(96,DD,06,3D), V(DD,3E,05,AE), V(4D,E6,BD,46), \V(91,54,8D,B5), V(71,C4,5D,05), V(04,06,D4,6F), V(60,50,15,FF), \V(19,98,FB,24), V(D6,BD,E9,97), V(89,40,43,CC), V(67,D9,9E,77), \V(B0,E8,42,BD), V(07,89,8B,88), V(E7,19,5B,38), V(79,C8,EE,DB), \V(A1,7C,0A,47), V(7C,42,0F,E9), V(F8,84,1E,C9), V(00,00,00,00), \V(09,80,86,83), V(32,2B,ED,48), V(1E,11,70,AC), V(6C,5A,72,4E), \V(FD,0E,FF,FB), V(0F,85,38,56), V(3D,AE,D5,1E), V(36,2D,39,27), \V(0A,0F,D9,64), V(68,5C,A6,21), V(9B,5B,54,D1), V(24,36,2E,3A), \V(0C,0A,67,B1), V(93,57,E7,0F), V(B4,EE,96,D2), V(1B,9B,91,9E), \V(80,C0,C5,4F), V(61,DC,20,A2), V(5A,77,4B,69), V(1C,12,1A,16), \V(E2,93,BA,0A), V(C0,A0,2A,E5), V(3C,22,E0,43), V(12,1B,17,1D), \V(0E,09,0D,0B), V(F2,8B,C7,AD), V(2D,B6,A8,B9), V(14,1E,A9,C8), \V(57,F1,19,85), V(AF,75,07,4C), V(EE,99,DD,BB), V(A3,7F,60,FD), \V(F7,01,26,9F), V(5C,72,F5,BC), V(44,66,3B,C5), V(5B,FB,7E,34), \V(8B,43,29,76), V(CB,23,C6,DC), V(B6,ED,FC,68), V(B8,E4,F1,63), \V(D7,31,DC,CA), V(42,63,85,10), V(13,97,22,40), V(84,C6,11,20), \V(85,4A,24,7D), V(D2,BB,3D,F8), V(AE,F9,32,11), V(C7,29,A1,6D), \V(1D,9E,2F,4B), V(DC,B2,30,F3), V(0D,86,52,EC), V(77,C1,E3,D0), \V(2B,B3,16,6C), V(A9,70,B9,99), V(11,94,48,FA), V(47,E9,64,22), \V(A8,FC,8C,C4), V(A0,F0,3F,1A), V(56,7D,2C,D8), V(22,33,90,EF), \V(87,49,4E,C7), V(D9,38,D1,C1), V(8C,CA,A2,FE), V(98,D4,0B,36), \V(A6,F5,81,CF), V(A5,7A,DE,28), V(DA,B7,8E,26), V(3F,AD,BF,A4), \V(2C,3A,9D,E4), V(50,78,92,0D), V(6A,5F,CC,9B), V(54,7E,46,62), \V(F6,8D,13,C2), V(90,D8,B8,E8), V(2E,39,F7,5E), V(82,C3,AF,F5), \V(9F,5D,80,BE), V(69,D0,93,7C), V(6F,D5,2D,A9), V(CF,25,12,B3), \V(C8,AC,99,3B), V(10,18,7D,A7), V(E8,9C,63,6E), V(DB,3B,BB,7B), \V(CD,26,78,09), V(6E,59,18,F4), V(EC,9A,B7,01), V(83,4F,9A,A8), \V(E6,95,6E,65), V(AA,FF,E6,7E), V(21,BC,CF,08), V(EF,15,E8,E6), \V(BA,E7,9B,D9), V(4A,6F,36,CE), V(EA,9F,09,D4), V(29,B0,7C,D6), \V(31,A4,B2,AF), V(2A,3F,23,31), V(C6,A5,94,30), V(35,A2,66,C0), \V(74,4E,BC,37), V(FC,82,CA,A6), V(E0,90,D0,B0), V(33,A7,D8,15), \V(F1,04,98,4A), V(41,EC,DA,F7), V(7F,CD,50,0E), V(17,91,F6,2F), \V(76,4D,D6,8D), V(43,EF,B0,4D), V(CC,AA,4D,54), V(E4,96,04,DF), \V(9E,D1,B5,E3), V(4C,6A,88,1B), V(C1,2C,1F,B8), V(46,65,51,7F), \V(9D,5E,EA,04), V(01,8C,35,5D), V(FA,87,74,73), V(FB,0B,41,2E), \V(B3,67,1D,5A), V(92,DB,D2,52), V(E9,10,56,33), V(6D,D6,47,13), \V(9A,D7,61,8C), V(37,A1,0C,7A), V(59,F8,14,8E), V(EB,13,3C,89), \V(CE,A9,27,EE), V(B7,61,C9,35), V(E1,1C,E5,ED), V(7A,47,B1,3C), \V(9C,D2,DF,59), V(55,F2,73,3F), V(18,14,CE,79), V(73,C7,37,BF), \V(53,F7,CD,EA), V(5F,FD,AA,5B), V(DF,3D,6F,14), V(78,44,DB,86), \V(CA,AF,F3,81), V(B9,68,C4,3E), V(38,24,34,2C), V(C2,A3,40,5F), \V(16,1D,C3,72), V(BC,E2,25,0C), V(28,3C,49,8B), V(FF,0D,95,41), \V(39,A8,01,71), V(08,0C,B3,DE), V(D8,B4,E4,9C), V(64,56,C1,90), \V(7B,CB,84,61), V(D5,32,B6,70), V(48,6C,5C,74), V(D0,B8,57,42)#define V(a,b,c,d) 0x##a##b##c##dstatic unsigned long RT0[256] = { RT };#undef V#define V(a,b,c,d) 0x##d##a##b##cstatic unsigned long RT1[256] = { RT };#undef V#define V(a,b,c,d) 0x##c##d##a##bstatic unsigned long RT2[256] = { RT };#undef V#define V(a,b,c,d) 0x##b##c##d##astatic unsigned long RT3[256] = { RT };#undef V//round constantsstatic unsigned long RCON[10] ={0x01000000, 0x02000000, 0x04000000, 0x08000000,0x10000000, 0x20000000, 0x40000000, 0x80000000,0x1B000000, 0x36000000};//key scheduling routineint AAES_SetKey(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchKey, int r_nBits){t_AMPSAESContext* poAMPSAESContext = r_pvAMPSAESContext;int i;unsigned long* RK;switch( r_nBits ){case 128: poAMPSAESContext->nNoOfRounds = 10; break;case 192: poAMPSAESContext->nNoOfRounds = 12; break;case 256: poAMPSAESContext->nNoOfRounds = 14; break;default : return( 1 );}RK = poAMPSAESContext->ulEncRoundKeys;for( i = 0; i < (r_nBits >> 5); i++ ){GET_UINT32( RK[i], r_puchKey, i * 4 );}//setup encryption round keysswitch( r_nBits ){case 128:for( i = 0; i < 10; i++, RK += 4 ){RK[4] = RK[0] ^ RCON[i] ^( FSb[ (unsigned char) ( RK[3] >> 16 ) ] << 24 ) ^( FSb[ (unsigned char) ( RK[3] >> 8 ) ] << 16 ) ^( FSb[ (unsigned char) ( RK[3] ) ] << 8 ) ^( FSb[ (unsigned char) ( RK[3] >> 24 ) ] );RK[5] = RK[1] ^ RK[4];RK[6] = RK[2] ^ RK[5];RK[7] = RK[3] ^ RK[6];}break;case 192:for( i = 0; i < 8; i++, RK += 6 ){RK[6] = RK[0] ^ RCON[i] ^( FSb[ (unsigned char) ( RK[5] >> 16 ) ] << 24 ) ^( FSb[ (unsigned char) ( RK[5] >> 8 ) ] << 16 ) ^( FSb[ (unsigned char) ( RK[5] ) ] << 8 ) ^( FSb[ (unsigned char) ( RK[5] >> 24 ) ] );RK[7] = RK[1] ^ RK[6];RK[8] = RK[2] ^ RK[7];RK[9] = RK[3] ^ RK[8];RK[10] = RK[4] ^ RK[9];RK[11] = RK[5] ^ RK[10];}break;case 256:for( i = 0; i < 7; i++, RK += 8 ){RK[8] = RK[0] ^ RCON[i] ^( FSb[ (unsigned char) ( RK[7] >> 16 ) ] << 24 ) ^( FSb[ (unsigned char) ( RK[7] >> 8 ) ] << 16 ) ^( FSb[ (unsigned char) ( RK[7] ) ] << 8 ) ^( FSb[ (unsigned char) ( RK[7] >> 24 ) ] );RK[9] = RK[1] ^ RK[8];RK[10] = RK[2] ^ RK[9];RK[11] = RK[3] ^ RK[10];RK[12] = RK[4] ^( FSb[ (unsigned char) ( RK[11] >> 24 ) ] << 24 ) ^( FSb[ (unsigned char) ( RK[11] >> 16 ) ] << 16 ) ^( FSb[ (unsigned char) ( RK[11] >> 8 ) ] << 8 ) ^( FSb[ (unsigned char) ( RK[11] ) ] );RK[13] = RK[5] ^ RK[12];RK[14] = RK[6] ^ RK[13];RK[15] = RK[7] ^ RK[14];}break;}//setup decryption round keysfor( i = 0; i <= poAMPSAESContext->nNoOfRounds; i++ ){poAMPSAESContext->ulDecRoundKeys[i * 4 ] = poAMPSAESContext->ulEncRoundKeys[( poAMPSAESContext->nNoOfRounds - i ) * 4 ];poAMPSAESContext->ulDecRoundKeys[i * 4 + 1] = poAMPSAESContext->ulEncRoundKeys[( poAMPSAESContext->nNoOfRounds - i ) * 4 + 1];poAMPSAESContext->ulDecRoundKeys[i * 4 + 2] = poAMPSAESContext->ulEncRoundKeys[( poAMPSAESContext->nNoOfRounds - i ) * 4 + 2];poAMPSAESContext->ulDecRoundKeys[i * 4 + 3] = poAMPSAESContext->ulEncRoundKeys[( poAMPSAESContext->nNoOfRounds - i ) * 4 + 3];}for( i = 1, RK = poAMPSAESContext->ulDecRoundKeys + 4; i < poAMPSAESContext->nNoOfRounds; i++, RK += 4 ){RK[0] = RT0[ FSb[ (unsigned char) ( RK[0] >> 24 ) ] ] ^RT1[ FSb[ (unsigned char) ( RK[0] >> 16 ) ] ] ^RT2[ FSb[ (unsigned char) ( RK[0] >> 8 ) ] ] ^RT3[ FSb[ (unsigned char) ( RK[0] ) ] ];RK[1] = RT0[ FSb[ (unsigned char) ( RK[1] >> 24 ) ] ] ^RT1[ FSb[ (unsigned char) ( RK[1] >> 16 ) ] ] ^RT2[ FSb[ (unsigned char) ( RK[1] >> 8 ) ] ] ^RT3[ FSb[ (unsigned char) ( RK[1] ) ] ];RK[2] = RT0[ FSb[ (unsigned char) ( RK[2] >> 24 ) ] ] ^RT1[ FSb[ (unsigned char) ( RK[2] >> 16 ) ] ] ^RT2[ FSb[ (unsigned char) ( RK[2] >> 8 ) ] ] ^RT3[ FSb[ (unsigned char) ( RK[2] ) ] ];RK[3] = RT0[ FSb[ (unsigned char) ( RK[3] >> 24 ) ] ] ^RT1[ FSb[ (unsigned char) ( RK[3] >> 16 ) ] ] ^RT2[ FSb[ (unsigned char) ( RK[3] >> 8 ) ] ] ^RT3[ FSb[ (unsigned char) ( RK[3] ) ] ];}return( 0 );}//128-bit block encryption routinevoid AAES_Encrypt(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchInputBuff, unsigned int r_unInputBuffLength, unsigned char* r_puchOutputBuff){t_AMPSAESContext* poAMPSAESContext = r_pvAMPSAESContext;unsigned long *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;unsigned char* puchInputBuff = NULL;unsigned char* puchOutputBuff = NULL;int nLoopCount = r_unInputBuffLength/16;int nBuffOffSet = 0;for(; nLoopCount >= 0; nLoopCount--, nBuffOffSet+=16){X0 = 0;X1 = 0;X2 = 0;X3 = 0;Y0 = 0;Y1 = 0;Y2 = 0;Y3 = 0;puchInputBuff = r_puchInputBuff + nBuffOffSet;puchOutputBuff = r_puchOutputBuff + nBuffOffSet;RK = poAMPSAESContext->ulEncRoundKeys;GET_UINT32( X0, puchInputBuff, 0 ); X0 ^= RK[0];GET_UINT32( X1, puchInputBuff, 4 ); X1 ^= RK[1];GET_UINT32( X2, puchInputBuff, 8 ); X2 ^= RK[2];GET_UINT32( X3, puchInputBuff, 12 ); X3 ^= RK[3];#define FROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \{ \RK += 4; \\X0 = RK[0] ^ FT0[ (unsigned char) ( Y0 >> 24 ) ] ^ \FT1[ (unsigned char) ( Y1 >> 16 ) ] ^ \FT2[ (unsigned char) ( Y2 >> 8 ) ] ^ \FT3[ (unsigned char) ( Y3 ) ]; \\X1 = RK[1] ^ FT0[ (unsigned char) ( Y1 >> 24 ) ] ^ \FT1[ (unsigned char) ( Y2 >> 16 ) ] ^ \FT2[ (unsigned char) ( Y3 >> 8 ) ] ^ \FT3[ (unsigned char) ( Y0 ) ]; \\X2 = RK[2] ^ FT0[ (unsigned char) ( Y2 >> 24 ) ] ^ \FT1[ (unsigned char) ( Y3 >> 16 ) ] ^ \FT2[ (unsigned char) ( Y0 >> 8 ) ] ^ \FT3[ (unsigned char) ( Y1 ) ]; \\X3 = RK[3] ^ FT0[ (unsigned char) ( Y3 >> 24 ) ] ^ \FT1[ (unsigned char) ( Y0 >> 16 ) ] ^ \FT2[ (unsigned char) ( Y1 >> 8 ) ] ^ \FT3[ (unsigned char) ( Y2 ) ]; \}FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 1FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 2FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 3FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 4FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 5FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 6FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 7FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 8FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 9if( poAMPSAESContext->nNoOfRounds > 10 ){FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 10FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 11}if( poAMPSAESContext->nNoOfRounds > 12 ){FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 12FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 13}//last roundRK += 4;X0 = RK[0] ^ ( FSb[ (unsigned char) ( Y0 >> 24 ) ] << 24 ) ^( FSb[ (unsigned char) ( Y1 >> 16 ) ] << 16 ) ^( FSb[ (unsigned char) ( Y2 >> 8 ) ] << 8 ) ^( FSb[ (unsigned char) ( Y3 ) ] );X1 = RK[1] ^ ( FSb[ (unsigned char) ( Y1 >> 24 ) ] << 24 ) ^( FSb[ (unsigned char) ( Y2 >> 16 ) ] << 16 ) ^( FSb[ (unsigned char) ( Y3 >> 8 ) ] << 8 ) ^( FSb[ (unsigned char) ( Y0 ) ] );X2 = RK[2] ^ ( FSb[ (unsigned char) ( Y2 >> 24 ) ] << 24 ) ^( FSb[ (unsigned char) ( Y3 >> 16 ) ] << 16 ) ^( FSb[ (unsigned char) ( Y0 >> 8 ) ] << 8 ) ^( FSb[ (unsigned char) ( Y1 ) ] );X3 = RK[3] ^ ( FSb[ (unsigned char) ( Y3 >> 24 ) ] << 24 ) ^( FSb[ (unsigned char) ( Y0 >> 16 ) ] << 16 ) ^( FSb[ (unsigned char) ( Y1 >> 8 ) ] << 8 ) ^( FSb[ (unsigned char) ( Y2 ) ] );PUT_UINT32( X0, puchOutputBuff, 0 );PUT_UINT32( X1, puchOutputBuff, 4 );PUT_UINT32( X2, puchOutputBuff, 8 );PUT_UINT32( X3, puchOutputBuff, 12 );}}// 128-bit block decryption routinevoid AAES_Decrypt(void* r_pvAMPSContext, void* r_pvAMPSAESContext, unsigned char* r_puchInputBuff, unsigned int r_unInputBuffLength, unsigned char* r_puchOutputBuff){t_AMPSAESContext* poAMPSAESContext = r_pvAMPSAESContext;unsigned long *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;unsigned char* puchInputBuff = NULL;unsigned char* puchOutputBuff = NULL;int nLoopCount = r_unInputBuffLength/16;int nBuffOffSet = 0;for(; nLoopCount >= 0; nLoopCount--, nBuffOffSet+=16){X0 = 0;X1 = 0;X2 = 0;X3 = 0;Y0 = 0;Y1 = 0;Y2 = 0;Y3 = 0;puchInputBuff = r_puchInputBuff + nBuffOffSet;puchOutputBuff = r_puchOutputBuff + nBuffOffSet;RK = poAMPSAESContext->ulDecRoundKeys;GET_UINT32( X0, puchInputBuff, 0 ); X0 ^= RK[0];GET_UINT32( X1, puchInputBuff, 4 ); X1 ^= RK[1];GET_UINT32( X2, puchInputBuff, 8 ); X2 ^= RK[2];GET_UINT32( X3, puchInputBuff, 12 ); X3 ^= RK[3];#define RROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \{ \RK += 4; \\X0 = RK[0] ^ RT0[ (unsigned char) ( Y0 >> 24 ) ] ^ \RT1[ (unsigned char) ( Y3 >> 16 ) ] ^ \RT2[ (unsigned char) ( Y2 >> 8 ) ] ^ \RT3[ (unsigned char) ( Y1 ) ]; \\X1 = RK[1] ^ RT0[ (unsigned char) ( Y1 >> 24 ) ] ^ \RT1[ (unsigned char) ( Y0 >> 16 ) ] ^ \RT2[ (unsigned char) ( Y3 >> 8 ) ] ^ \RT3[ (unsigned char) ( Y2 ) ]; \\X2 = RK[2] ^ RT0[ (unsigned char) ( Y2 >> 24 ) ] ^ \RT1[ (unsigned char) ( Y1 >> 16 ) ] ^ \RT2[ (unsigned char) ( Y0 >> 8 ) ] ^ \RT3[ (unsigned char) ( Y3 ) ]; \\X3 = RK[3] ^ RT0[ (unsigned char) ( Y3 >> 24 ) ] ^ \RT1[ (unsigned char) ( Y2 >> 16 ) ] ^ \RT2[ (unsigned char) ( Y1 >> 8 ) ] ^ \RT3[ (unsigned char) ( Y0 ) ]; \}RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 1RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 2RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 3RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 4RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 5RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 6RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 7RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 8RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 9if( poAMPSAESContext->nNoOfRounds > 10 ){RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 10RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 11}if( poAMPSAESContext->nNoOfRounds > 12 ){RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); //round 12RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); //round 13}//last roundRK += 4;X0 = RK[0] ^ ( RSb[ (unsigned char) ( Y0 >> 24 ) ] << 24 ) ^( RSb[ (unsigned char) ( Y3 >> 16 ) ] << 16 ) ^( RSb[ (unsigned char) ( Y2 >> 8 ) ] << 8 ) ^( RSb[ (unsigned char) ( Y1 ) ] );X1 = RK[1] ^ ( RSb[ (unsigned char) ( Y1 >> 24 ) ] << 24 ) ^( RSb[ (unsigned char) ( Y0 >> 16 ) ] << 16 ) ^( RSb[ (unsigned char) ( Y3 >> 8 ) ] << 8 ) ^( RSb[ (unsigned char) ( Y2 ) ] );X2 = RK[2] ^ ( RSb[ (unsigned char) ( Y2 >> 24 ) ] << 24 ) ^( RSb[ (unsigned char) ( Y1 >> 16 ) ] << 16 ) ^( RSb[ (unsigned char) ( Y0 >> 8 ) ] << 8 ) ^( RSb[ (unsigned char) ( Y3 ) ] );X3 = RK[3] ^ ( RSb[ (unsigned char) ( Y3 >> 24 ) ] << 24 ) ^( RSb[ (unsigned char) ( Y2 >> 16 ) ] << 16 ) ^( RSb[ (unsigned char) ( Y1 >> 8 ) ] << 8 ) ^( RSb[ (unsigned char) ( Y0 ) ] );PUT_UINT32( X0, puchOutputBuff, 0 );PUT_UINT32( X1, puchOutputBuff, 4 );PUT_UINT32( X2, puchOutputBuff, 8 );PUT_UINT32( X3, puchOutputBuff, 12 );}}- AMPS:AES模块源码解读
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