nrf51822微信---AES加密

AES 是块加密，块的长度是 16 个字节，如果原文不到 16 个字节，则需要填充至 16 个字节后再进行处理。
AES 密文长度 = (原文长度 / 16) * 16 + 16

这里的“/”表示整除

#ifndef __AES_H#define __AES_H#ifdef __cplusplusextern "C" {#endif// ÒÔbitΪµ¥Î»µÄÃÜÔ¿³¤¶È£¬Ö»ÄÜΪ 128£¬192 ºÍ 256 ÈýÖÖ#define AES_KEY_LENGTH128// ¼Ó½âÃÜģʽ#define AES_MODE_ECB0// µç×ÓÃÜÂ뱾ģʽ£¨Ò»°ãģʽ£©#define AES_MODE_CBC1// ÃÜÂë·Ö×éÁ´½Óģʽ#define AES_MODEAES_MODE_CBC/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Init//ÃèÊö£º³õʼ»¯£¬ÔÚ´ËÖ´ÐÐÀ©Õ¹ÃÜÔ¿²Ù×÷¡£//ÊäÈë²ÎÊý£ºpKey -- ԭʼÃÜÔ¿£¬Æ䳤¶È±ØÐëΪ AES_KEY_LENGTH/8 ×Ö½Ú¡£//Êä³ö²ÎÊý£ºÎÞ¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////void AES_Init(const void *pKey);////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Encrypt//ÃèÊö£º¼ÓÃÜÊý¾Ý//ÊäÈë²ÎÊý£ºpPlainText-- Ã÷ÎÄ£¬¼´Ðè¼ÓÃܵÄÊý¾Ý£¬Æ䳤¶ÈΪnDataLen×Ö½Ú¡£//nDataLen-- Êý¾Ý³¤¶È£¬ÒÔ×Ö½ÚΪµ¥Î»£¬±ØÐëΪAES_KEY_LENGTH/8µÄÕû±¶Êý¡£//pIV-- ³õʼ»¯ÏòÁ¿£¬Èç¹ûʹÓÃECBģʽ£¬¿ÉÉèΪNULL¡£//Êä³ö²ÎÊý£ºpCipherText-- ÃÜÎÄ£¬¼´ÓÉÃ÷ÎļÓÃܺóµÄÊý¾Ý£¬¿ÉÒÔÓëpPlainTextÏàͬ¡£//·µ»ØÖµ£ºÎÞ¡£//////////////////////////////////////////////////////////////////////////void  AES_Encrypt(const unsigned char *pPlainText, unsigned char *pCipherText,  unsigned int nDataLen, const unsigned char *pIV);////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Decrypt//ÃèÊö£º½âÃÜÊý¾Ý//ÊäÈë²ÎÊý£ºpCipherText -- ÃÜÎÄ£¬¼´Ðè½âÃܵÄÊý¾Ý£¬Æ䳤¶ÈΪnDataLen×Ö½Ú¡£//nDataLen-- Êý¾Ý³¤¶È£¬ÒÔ×Ö½ÚΪµ¥Î»£¬±ØÐëΪAES_KEY_LENGTH/8µÄÕû±¶Êý¡£//pIV-- ³õʼ»¯ÏòÁ¿£¬Èç¹ûʹÓÃECBģʽ£¬¿ÉÉèΪNULL¡£//Êä³ö²ÎÊý£ºpPlainText  -- Ã÷ÎÄ£¬¼´ÓÉÃÜÎĽâÃܺóµÄÊý¾Ý£¬¿ÉÒÔÓëpCipherTextÏàͬ¡£//·µ»ØÖµ£ºÎÞ¡£//////////////////////////////////////////////////////////////////////////void AES_Decrypt(unsigned char *pPlainText, const unsigned char *pCipherText,  unsigned int nDataLen, const unsigned char *pIV);//¶ÔÊý¾Ý½øÐнâÃܲÙ×÷£¬³É¹¦·µ»Ø1£¬Ê§°Ü·µ»Ø0unsigned char app_data_encode_aes(char *input, char *output, unsigned short *slen);unsigned char app_data_decode_aes(unsigned char *input, char *output, unsigned short *slen);unsigned int  AES_Encrypt_PKCS7(const unsigned char *pPlainText, unsigned char *pCipherText, unsigned int  nDataLen, const unsigned char *pIV);unsigned int  AES_get_length(unsigned int length);void AES_free(unsigned char* p);#ifdef __cplusplus}#endif#endif// __AES_H

#include "aes.h"//#include "malloc.h"#include <string.h>#include <stdlib.h>#include <stdint.h>#include <stdio.h>// ΪÁËÄÜÕë¶ÔC51½øÐÐÓÅ»¯£¬²¢ÇÒÓÖʹ´úÂë¿ÉÓÃÓÚARMºÍPCµÈ»·¾³£¬// ÔÚ·ÇC51»·¾³£¨Ã»Óж¨Òå__C51__£©ÏÂÐèÒª°ÑC51Ìض¨µÄ¹Ø¼ü×Ö¶¨ÒåΪ¿Õ#ifndef __C51__#define code#define data#define idata#define xdata#define pdatatypedef unsigned char BOOL;#elsetypedef bit BOOL;#endif#define Nk(AES_KEY_LENGTH / 32)// ÒÔ¡°×Ö¡±£¨4×Ö½Ú£©Îªµ¥Î»µÄÃÜÔ¿³¤¶È#define Nb4// ÒÔ¡°×Ö¡±£¨4×Ö½Ú£©Îªµ¥Î»µÄ¼Ó½âÃÜÊý¾Ý¿é´óС£¬¹Ì¶¨Îª4// Nr£º¼ÓÃܵÄÂÖÊý#if   AES_KEY_LENGTH == 128#define Nr10#elif AES_KEY_LENGTH == 192#define Nr12#elif AES_KEY_LENGTH == 256#define Nr14#else#error AES_KEY_LENGTH must be 128, 192 or 256 BOOLs!#endif// GF(28) ¶àÏîʽ#define BPOLY 0x1B // Lower 8 BOOLs of (x^8 + x^4 + x^3 + x + 1), ie. (x^4 + x^3 + x + 1).// AES×ÓÃÜÔ¿±í£¬µ±ÃÜÔ¿³¤¶ÈΪ128λʱ£¬Õ¼ÓÃ176×Ö½Ú¿Õ¼ästatic xdata unsigned char g_roundKeyTable[4*Nb*(Nr+1)];// ¼ÓÃÜÓõÄSBoxstatic code const unsigned char SBox[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 };// ½âÃÜÓõÄSBoxstatic code const unsigned char InvSBox[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};/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºRotationWord//ÃèÊö£º¶ÔÒ»¸ö¡°×Ö¡±Êý¾Ý½øÐÐÑ­»·ÓÒÒÆ¡£//ÊäÈë²ÎÊý£ºpWord -- ÒªÓÒÒƵÄ4×Ö½ÚÊý¾Ý¡£//Êä³ö²ÎÊý£ºpWord -- ÓÒÒƺóµÄ4×Ö½ÚÊý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void RotationWord(unsigned char *pWord){unsigned char temp = pWord[0];pWord[0]  = pWord[1];pWord[1]  = pWord[2];pWord[2]  = pWord[3];pWord[3]  = temp;}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºXorBytes//ÃèÊö£ºÅúÁ¿Òì»òÁ½×éÊý¾Ý¡£//ÊäÈë²ÎÊý£ºpData1 -- ÒªÒì»òµÄµÚÒ»×éÊý¾Ý¡£//pData1 -- ÒªÒì»òµÄµÚ¶þ×éÊý¾Ý¡£//nCount -- ÒªÒì»òµÄÊý¾Ý³¤¶È¡£//Êä³ö²ÎÊý£ºpData1 -- Òì»òºóµÄ½á¹û¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void XorBytes(unsigned char *pData1, const unsigned char *pData2, unsigned char nCount){unsigned char i;for (i = 0; i < nCount; i++){pData1[i] ^= pData2[i];}}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAddRoundKey//ÃèÊö£º°Ñ Öмä״̬Êý¾Ý ¼ÓÉÏ£¨Òì»ò£©×ÓÃÜÔ¿£¬Êý¾Ý³¤¶ÈΪ16×Ö½Ú¡£//ÊäÈë²ÎÊý£ºpState  -- ״̬Êý¾Ý¡£//pRoundKey -- ×ÓÃÜÔ¿Êý¾Ý¡£//Êä³ö²ÎÊý£ºpState  -- ¼ÓÉÏ×ÓÃÜÔ¿ºóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////// static void AddRoundKey(unsigned char *pState, const unsigned char *pRoundKey)// {// XorBytes(pState, pRoundKey, 4*Nb);// }// AddRoundKeyµÄºêÐÎʽ£¬±Èº¯ÊýÐÎʽ¿ÉÒÔ½ÚÊ¡4×Ö½ÚµÄdataÊý¾Ý#define AddRoundKey(pState, pRoundKey) \XorBytes((pState), (pRoundKey), 4*Nb)/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºSubBytes//ÃèÊö£ºÍ¨¹ýSºÐ×ÓÖû»×´Ì¬Êý¾Ý¡£//ÊäÈë²ÎÊý£ºpState-- ״̬Êý¾Ý¡£//nCount  -- ״̬Êý¾Ý³¤¶È¡£//bInvert-- ÊÇ·ñʹÓ÷´ÏòSºÐ×Ó£¨½âÃÜʱʹÓã©¡£//Êä³ö²ÎÊý£ºpState-- Öû»ºóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void SubBytes(unsigned char *pState, unsigned char nCount, BOOL bInvert){unsigned char i;const unsigned char code *pSBox = bInvert ? InvSBox : SBox;for (i = 0; i < nCount; i++){pState[i] = pSBox[pState[i]];}}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºShiftRows//ÃèÊö£º°Ñ״̬Êý¾ÝÒÆÐС£//ÊäÈë²ÎÊý£ºpState-- ״̬Êý¾Ý¡£//bInvert-- ÊÇ·ñ·´ÏòÒÆÐУ¨½âÃÜʱʹÓã©¡£//Êä³ö²ÎÊý£ºpState-- ÒÆÐкóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void ShiftRows(unsigned char *pState, BOOL bInvert){// ×¢Ò⣺״̬Êý¾ÝÒÔÁÐÐÎʽ´æ·Å£¡unsigned char r;// row£¬   ÐÐunsigned char c;// column£¬ÁÐunsigned char temp;unsigned char rowData[4];for (r = 1; r < 4; r++){// ±¸·ÝÒ»ÐÐÊý¾Ýfor (c = 0; c < 4; c++){rowData[c] = pState[r + 4*c];}temp = bInvert ? (4 - r) : r;for (c = 0; c < 4; c++){pState[r + 4*c] = rowData[(c + temp) % 4];}}}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºGfMultBy02//ÃèÊö£ºÔÚGF(28)ÓòµÄ ³Ë2 ÔËËã¡£//ÊäÈë²ÎÊý£ºnum-- ³ËÊý¡£//Êä³ö²ÎÊý£ºÎÞ¡£//·µ»ØÖµ£ºnum³ËÒÔ2µÄ½á¹û¡£///////////////////////////////////////////////////////////////////////////////static unsigned char GfMultBy02(unsigned char num){if ((num & 0x80) == 0){num = num << 1;}else{num = (num << 1) ^ BPOLY;}return num;}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºMixColumns//ÃèÊö£º»ìºÏ״̬¸÷ÁÐÊý¾Ý¡£//ÊäÈë²ÎÊý£ºpState-- ״̬Êý¾Ý¡£//bInvert-- ÊÇ·ñ·´Ïò»ìºÏ£¨½âÃÜʱʹÓã©¡£//Êä³ö²ÎÊý£ºpState-- »ìºÏÁкóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void MixColumns(unsigned char *pState, BOOL bInvert){unsigned char i;unsigned char temp;unsigned char a0Pa2_M4;// 4(a0 + a2)unsigned char a1Pa3_M4;// 4(a1 + a3)unsigned char result[4];for (i = 0; i < 4; i++, pState += 4){// b0 = 2a0 + 3a1 + a2 + a3 //    = (a0 + a1 + a2 + a3) + 2(a0 + a1) + a0temp = pState[0] ^ pState[1] ^ pState[2] ^ pState[3];result[0] = temp ^ pState[0] ^ GfMultBy02((unsigned char) (pState[0] ^ pState[1]));result[1] = temp ^ pState[1] ^ GfMultBy02((unsigned char) (pState[1] ^ pState[2]));result[2] = temp ^ pState[2] ^ GfMultBy02((unsigned char) (pState[2] ^ pState[3]));result[3] = temp ^ pState[3] ^ GfMultBy02((unsigned char) (pState[3] ^ pState[0]));if (bInvert){// b0' = 14a0 + 11a1 + 13a2 + 9a3 //     = (a0 + a1 + a2 + a3) + 2(a0 + a1) + a0£¨Õⲿ·ÖΪb0£©//       + 2(4(a0 + a2) + 4(a1 + a3))//       +   4(a0 + a2)a0Pa2_M4 = GfMultBy02(GfMultBy02((unsigned char) (pState[0] ^ pState[2])));a1Pa3_M4 = GfMultBy02(GfMultBy02((unsigned char) (pState[1] ^ pState[3])));temp = GfMultBy02((unsigned char) (a0Pa2_M4 ^ a1Pa3_M4));result[0] ^= temp ^ a0Pa2_M4;result[1] ^= temp ^ a1Pa3_M4;result[2] ^= temp ^ a0Pa2_M4;result[3] ^= temp ^ a1Pa3_M4;}memcpy(pState, result, 4);}}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºBlockEncrypt//ÃèÊö£º¶Ôµ¥¿éÊý¾Ý¼ÓÃÜ¡£//ÊäÈë²ÎÊý£ºpState -- ״̬Êý¾Ý¡£//Êä³ö²ÎÊý£ºpState -- ¼ÓÃܺóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void BlockEncrypt(unsigned char *pState){unsigned char i;AddRoundKey(pState, g_roundKeyTable);for (i = 1; i <= Nr; i++)// i = [1, Nr]{SubBytes(pState, 4*Nb, 0);ShiftRows(pState, 0);if (i != Nr){MixColumns(pState, 0);}AddRoundKey(pState, &g_roundKeyTable[4*Nb*i]);}// ΪÁ˽ÚÊ¡´úÂ룬ºÏ²¢µ½Ñ­»¯Ö´ÐÐ// SubBytes(pState, 4*Nb);//ShiftRows(pState, 0);// AddRoundKey(pState, &g_roundKeyTable[4*Nb*Nr]);}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºBlockDecrypt//ÃèÊö£º¶Ôµ¥¿éÊý¾Ý½âÃÜ¡£//ÊäÈë²ÎÊý£ºpState -- ״̬Êý¾Ý¡£//Êä³ö²ÎÊý£ºpState -- ½âÃܺóµÄ״̬Êý¾Ý¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////static void BlockDecrypt(unsigned char *pState){unsigned char i;AddRoundKey(pState, &g_roundKeyTable[4*Nb*Nr]);for (i = Nr; i > 0; i--)// i = [Nr, 1]{ShiftRows(pState, 1);SubBytes(pState, 4*Nb, 1);AddRoundKey(pState, &g_roundKeyTable[4*Nb*(i-1)]);if (i != 1){MixColumns(pState, 1);}}}/////////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Init//ÃèÊö£º³õʼ»¯£¬ÔÚ´ËÖ´ÐÐÀ©Õ¹ÃÜÔ¿²Ù×÷¡£//ÊäÈë²ÎÊý£ºpKey -- ԭʼÃÜÔ¿£¬Æ䳤¶È±ØÐëΪ AES_KEY_LENGTH/8 ×Ö½Ú¡£//Êä³ö²ÎÊý£ºÎÞ¡£//·µ»ØÖµ£ºÎÞ¡£///////////////////////////////////////////////////////////////////////////////void AES_Init(const void *pKey){// À©Õ¹ÃÜÔ¿unsigned char i;unsigned char *pRoundKey;unsigned char Rcon[4] = {0x01, 0x00, 0x00, 0x00};memcpy(g_roundKeyTable, pKey, 4*Nk);pRoundKey = &g_roundKeyTable[4*Nk];for (i = Nk; i < Nb*(Nr+1); pRoundKey += 4, i++){memcpy(pRoundKey, pRoundKey - 4, 4);if (i % Nk == 0){RotationWord(pRoundKey);SubBytes(pRoundKey, 4, 0);XorBytes(pRoundKey, Rcon, 4);Rcon[0] = GfMultBy02(Rcon[0]);}else if (Nk > 6 && i % Nk == Nb){SubBytes(pRoundKey, 4, 0);}XorBytes(pRoundKey, pRoundKey - 4*Nk, 4);}}unsigned int AES_get_length(unsigned int length){return ((length>>4) + 1)<<4;}////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Encrypt//ÃèÊö£º¼ÓÃÜÊý¾Ý//ÊäÈë²ÎÊý£ºpPlainText-- Ã÷ÎÄ£¬¼´Ðè¼ÓÃܵÄÊý¾Ý£¬Æ䳤¶ÈΪnDataLen×Ö½Ú¡£//nDataLen-- Êý¾Ý³¤¶È£¬ÒÔ×Ö½ÚΪµ¥Î»//pIV-- ³õʼ»¯ÏòÁ¿£¬Èç¹ûʹÓÃECBģʽ£¬¿ÉÉèΪNULL¡£//Êä³ö²ÎÊý£ºpCipherText-- ÃÜÎÄ£¬¼´ÓÉÃ÷ÎļÓÃܺóµÄÊý¾Ý£¬¿ÉÒÔÓëpPlainTextÏàͬ¡£//·µ»ØÖµ£ºÎÞ¡£//////////////////////////////////////////////////////////////////////////unsigned int AES_Encrypt_PKCS7(const unsigned char *pPlainText, unsigned char *pCipherText,  unsigned int nDataLen, const unsigned char *pIV){unsigned int i;//³¤¶Èµ÷Õûunsigned int length = nDataLen;nDataLen = ((nDataLen>>4) + 1)<<4;uint8_t p=(Nb<<2)-(length%(Nb<<2));if (pPlainText != pCipherText){memcpy(pCipherText,pPlainText,length);}//Ìî³äunsigned char temp[16];memset(temp,p,16);if(length<nDataLen){memcpy(pCipherText + length,temp,nDataLen - length);}if(length == nDataLen){memcpy(pCipherText + length,temp,16);}for (i = nDataLen/(4*Nb); i > 0 ; i--, pCipherText += 4*Nb){#if AES_MODE == AES_MODE_CBCXorBytes(pCipherText, pIV, 4*Nb);#endifBlockEncrypt(pCipherText);pIV = pCipherText;}return(nDataLen);}////////////////////////////////////////////////////////////////////////////º¯ÊýÃû£ºAES_Decrypt//ÃèÊö£º½âÃÜÊý¾Ý//ÊäÈë²ÎÊý£ºpCipherText -- ÃÜÎÄ£¬¼´Ðè½âÃܵÄÊý¾Ý£¬Æ䳤¶ÈΪnDataLen×Ö½Ú¡£//nDataLen-- Êý¾Ý³¤¶È£¬ÒÔ×Ö½ÚΪµ¥Î»£¬±ØÐëΪAES_KEY_LENGTH/8µÄÕû±¶Êý¡£//pIV-- ³õʼ»¯ÏòÁ¿£¬Èç¹ûʹÓÃECBģʽ£¬¿ÉÉèΪNULL¡£//Êä³ö²ÎÊý£ºpPlainText  -- Ã÷ÎÄ£¬¼´ÓÉÃÜÎĽâÃܺóµÄÊý¾Ý£¬¿ÉÒÔÓëpCipherTextÏàͬ¡£//·µ»ØÖµ£ºÎÞ¡£//////////////////////////////////////////////////////////////////////////void AES_Decrypt(unsigned char *pPlainText, const unsigned char *pCipherText,  unsigned int nDataLen, const unsigned char *pIV){unsigned int i;if (pPlainText != pCipherText){memcpy(pPlainText, pCipherText, nDataLen);}// ´Ó×îºóÒ»¿éÊý¾Ý¿ªÊ¼½âÃÜ£¬ÕâÑù²»Óÿª±Ù¿Õ¼äÀ´±£´æIVpPlainText += nDataLen - 4*Nb;for (i = nDataLen/(4*Nb); i > 0 ; i--, pPlainText -= 4*Nb){BlockDecrypt(pPlainText);#if AES_MODE == AES_MODE_CBCif (i == 1){// ×îºóÒ»¿éÊý¾ÝXorBytes(pPlainText, pIV, 4*Nb);}else{XorBytes(pPlainText, pPlainText - 4*Nb, 4*Nb);}#endif}}

main函数测试：

void main(void){    int r = 0,i;  unsigned char Encrypt[16]={11,22,33,44,55,66,77,88,99,0,11,22,11,22,33,44};unsigned char Decrypt[16]={0};unsigned char temp[16]={0};unsigned char key[16]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f};        AES_Init(key);   AES_Encrypt_PKCS7 (Encrypt, Decrypt, 16, key);AES_Decrypt(temp, Decrypt, 16, key);}

temp的值和Encrpy相等！！！！