AES 加密解密的原理我就不说了， 弟兄们自己上百度去查， 文章很多。
我这里只列出从网上获取的代码的实现， 我修改了一些， 可以很方便的使用到你的代码里面。
AES 比DES算法的强度更强。AES使用128位的加密密钥就足够了， 不需要使用更长的密钥。毕竟密钥太长浪费CPU资源。
AES.h头文件
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#ifndef _AES_H #define _AES_H /*************** Header files *********************************************/ #include <stdlib.h> #include <string.h> #include <memory.h> //#include "cryptcom.h" #define AES_ModeType AI_ECB #define AES_PadType AI_PKCS_PADDING /*************** Assertions ***********************************************/ //////// Define the Endianness //////// #undef BIG_ENDIAN #undef LITTLE_ENDIAN #define USER_LITTLE_ENDIAN #if defined(USER_BIG_ENDIAN) #define BIG_ENDIAN #elif defined(USER_LITTLE_ENDIAN) #define LITTLE_ENDIAN #else #if 0 #define BIG_ENDIAN // Big-Endian machine with pointer casting #elif defined(_MSC_VER) #define LITTLE_ENDIAN // Little-Endian machine with pointer casting #else #error #endif #endif /*************** Macros ***************************************************/ //////// rotate by using shift operations //////// #if defined(_MSC_VER) #define ROTL_DWORD(x, n) _lrotl((x), (n)) #define ROTR_DWORD(x, n) _lrotr((x), (n)) #else #define ROTL_DWORD(x, n) ( (DWORD)((x) << (n)) | (DWORD)((x) >> (32-(n))) ) #define ROTR_DWORD(x, n) ( (DWORD)((x) >> (n)) | (DWORD)((x) << (32-(n))) ) #endif //////// reverse the byte order of DWORD(DWORD:4-bytes integer) and WORD. #define ENDIAN_REVERSE_DWORD(dwS) ( (ROTL_DWORD((dwS), 8) & 0x00ff00ff) | (ROTL_DWORD((dwS), 24) & 0xff00ff00) ) //////// move DWORD type to BYTE type and BYTE type to DWORD type #if defined(BIG_ENDIAN) //// Big-Endian machine #define BIG_B2D(B, D) D = *(DWORD *)(B) #define BIG_D2B(D, B) *(DWORD *)(B) = (DWORD)(D) #define LITTLE_B2D(B, D) D = ENDIAN_REVERSE_DWORD(*(DWORD *)(B)) #define LITTLE_D2B(D, B) *(DWORD *)(B) = ENDIAN_REVERSE_DWORD(D) #elif defined(LITTLE_ENDIAN) //// Little-Endian machine #define BIG_B2D(B, D) D = ENDIAN_REVERSE_DWORD(*(DWORD *)(B)) #define BIG_D2B(D, B) *(DWORD *)(B) = ENDIAN_REVERSE_DWORD(D) #define LITTLE_B2D(B, D) D = *(DWORD *)(B) #define LITTLE_D2B(D, B) *(DWORD *)(B) = (DWORD)(D) #else #error ERROR : Invalid DataChangeType #endif /*************** Definitions / Macros *************************************/ //// 泅犁 酒贰狼 4俺 规侥阑 瘤盔茄促. #define AI_ECB 1 #define AI_CBC 2 #define AI_OFB 3 #define AI_CFB 4 //// 泅犁 酒贰狼 滴 padding阑 瘤盔茄促. #define AI_NO_PADDING 1 // Padding 绝澜(涝仿捞 16官捞飘狼 硅荐) #define AI_PKCS_PADDING 2 // padding登绰 官捞飘 荐肺 padding //// AES俊 包访等 惑荐甸 #define AES_BLOCK_LEN 16 // in BYTEs #define AES_USER_KEY_LEN 32 // (16,24,32) in BYTEs #define AES_NO_ROUNDS 10 #define AES_NO_ROUNDKEY 68 // in DWORDs /*************** New Data Types *******************************************/ //////// Determine data types depand on the processor and compiler. #define BOOL int // 1-bit data type #define BYTE unsigned char // unsigned 1-byte data type #define WORD unsigned short int // unsigned 2-bytes data type #define DWORD unsigned int // unsigned 4-bytes data type #define RET_VAL DWORD // return values //// AES.. typedef struct{ DWORD ModeID; // ECB or CBC DWORD PadType; // 喉废鞠龋狼 Padding type BYTE IV[AES_BLOCK_LEN]; // Initial Vector BYTE ChainVar[AES_BLOCK_LEN]; // Chaining Variable BYTE Buffer[AES_BLOCK_LEN]; // Buffer for unfilled block DWORD BufLen; // Buffer狼 蜡瓤 官捞飘 荐 DWORD RoundKey[AES_NO_ROUNDKEY]; // 扼款靛 虐狼 DWORD 荐 } AES_ALG_INFO; /*************** Constant (Error Code) ************************************/ //// Error Code - 沥府窍绊, 利寸洒 免仿秦具 窃. #define CTR_SUCCESS 0 #define CTR_FATAL_ERROR 0x1001 #define CTR_INVALID_USERKEYLEN 0x1002 // 厚剐虐狼 辨捞啊 何利例窃. #define CTR_PAD_CHECK_ERROR 0x1003 // #define CTR_DATA_LEN_ERROR 0x1004 // 乞巩狼 辨捞啊 何利例窃. #define CTR_CIPHER_LEN_ERROR 0x1005 // 鞠龋巩捞 喉废狼 硅荐啊 酒丛. #ifdef __cplusplus extern "C" { #endif /*************** Prototypes ***********************************************/ //// 单捞鸥 鸥涝 AES_ALG_INFO俊 mode, padding 辆幅 棺 IV 蔼阑 檬扁拳茄促. void AES_SetAlgInfo( DWORD ModeID, DWORD PadType, BYTE *IV, AES_ALG_INFO *AlgInfo); //// 涝仿等 AES_USER_KEY_LEN官牢飘狼 厚剐虐肺 扼款靛 虐 积己 RET_VAL AES_EncKeySchedule( BYTE *UserKey, // 荤侩磊 厚剐虐甫 涝仿窃. DWORD UserKeyLen, AES_ALG_INFO *AlgInfo); // 鞠汗龋侩 Round Key啊 历厘凳. RET_VAL AES_DecKeySchedule( BYTE *UserKey, // 荤侩磊 厚剐虐甫 涝仿窃. DWORD UserKeyLen, AES_ALG_INFO *AlgInfo); // 鞠汗龋侩 Round Key啊 历厘凳. //// Init/Update/Final 屈侥阑 鞠龋拳. RET_VAL AES_EncInit( AES_ALG_INFO *AlgInfo); RET_VAL AES_EncUpdate( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 乞巩捞 涝仿凳. DWORD PlainTxtLen, BYTE *CipherTxt, // 鞠龋巩捞 免仿凳. DWORD *CipherTxtLen); RET_VAL AES_EncFinal( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿凳. DWORD *CipherTxtLen); //// Init/Update/Final 屈侥阑 汗龋拳. RET_VAL AES_DecInit( AES_ALG_INFO *AlgInfo); RET_VAL AES_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 涝仿凳. DWORD CipherTxtLen, BYTE *PlainTxt, // 汗龋巩捞 免仿凳. DWORD *PlainTxtLen); RET_VAL AES_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 汗龋巩捞 免仿凳. DWORD *PlainTxtLen); /*************** END OF FILE **********************************************/ #ifdef __cplusplus } #endif #endif // _AES_H |
AESENC.C文件
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/*************** Header files *********************************************/ #include "aes.h" /*************** Assertions ***********************************************/ /*************** Definitions / Macros ************************************/ #define BlockCopy(pbDst, pbSrc) { / ((DWORD *)(pbDst))[0] = ((DWORD *)(pbSrc))[0]; / ((DWORD *)(pbDst))[1] = ((DWORD *)(pbSrc))[1]; / ((DWORD *)(pbDst))[2] = ((DWORD *)(pbSrc))[2]; / ((DWORD *)(pbDst))[3] = ((DWORD *)(pbSrc))[3]; / } #define BlockXor(pbDst, phSrc1, phSrc2) { / ((DWORD *)(pbDst))[0] = ((DWORD *)(phSrc1))[0] / ^ ((DWORD *)(phSrc2))[0]; / ((DWORD *)(pbDst))[1] = ((DWORD *)(phSrc1))[1] / ^ ((DWORD *)(phSrc2))[1]; / ((DWORD *)(pbDst))[2] = ((DWORD *)(phSrc1))[2] / ^ ((DWORD *)(phSrc2))[2]; / ((DWORD *)(pbDst))[3] = ((DWORD *)(phSrc1))[3] / ^ ((DWORD *)(phSrc2))[3]; / } /*************** New Data Types *******************************************/ /*************** Global Variables *****************************************/ /*************** Prototypes ***********************************************/ void AES_Encrypt( void *CipherKey, // 鞠/汗龋侩 Round Key BYTE *Data); // 涝免仿阑 困茄 喉废阑 啊府虐绰 pointer void AES_Decrypt( void *CipherKey, // 鞠/汗龋侩 Round Key BYTE *Data); // 涝免仿阑 困茄 喉废阑 啊府虐绰 pointer /*************** Constants ************************************************/ /*************** Constants ************************************************/ /*************** Macros ***************************************************/ /*************** Global Variables *****************************************/ /*************** Function ************************************************* * */ void AES_SetAlgInfo( DWORD ModeID, DWORD PadType, BYTE *IV, AES_ALG_INFO *AlgInfo) { AlgInfo->ModeID = ModeID; AlgInfo->PadType = PadType; if( IV!=NULL ) memcpy(AlgInfo->IV, IV, AES_BLOCK_LEN); else memset(AlgInfo->IV, 0, AES_BLOCK_LEN); } /*************** Function ************************************************* * */ static RET_VAL PaddSet( BYTE *pbOutBuffer, DWORD dRmdLen, DWORD dBlockLen, DWORD dPaddingType) { DWORD dPadLen; switch( dPaddingType ) { case AI_NO_PADDING : if( dRmdLen==0 ) return 0; else return CTR_DATA_LEN_ERROR; case AI_PKCS_PADDING : dPadLen = dBlockLen - dRmdLen; memset(pbOutBuffer+dRmdLen, (char)dPadLen, (int)dPadLen); return dPadLen; default : return CTR_FATAL_ERROR; } } /*************** Function ************************************************* * */ static RET_VAL PaddCheck( BYTE *pbOutBuffer, DWORD dBlockLen, DWORD dPaddingType) { DWORD i, dPadLen; switch( dPaddingType ) { case AI_NO_PADDING : return 0; // padding等 单捞鸥啊 0官捞飘烙. case AI_PKCS_PADDING : dPadLen = pbOutBuffer[dBlockLen-1]; if( ((int)dPadLen<=0) || (dPadLen>(int)dBlockLen) ) return CTR_PAD_CHECK_ERROR; for( i=1; i<=dPadLen; i++) if( pbOutBuffer[dBlockLen-i] != dPadLen ) return CTR_PAD_CHECK_ERROR; return dPadLen; default : return CTR_FATAL_ERROR; } } /************************************************************************** * */ RET_VAL AES_EncInit( AES_ALG_INFO *AlgInfo) { AlgInfo->BufLen = 0; if( AlgInfo->ModeID!=AI_ECB ) memcpy(AlgInfo->ChainVar, AlgInfo->IV, AES_BLOCK_LEN); return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL ECB_EncUpdate( AES_ALG_INFO *AlgInfo, // BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD PlainTxtLen, // 涝仿登绰 乞巩狼 官捞飘 荐 BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; // *CipherTxtLen = BufLen + PlainTxtLen; // No one block if( *CipherTxtLen<BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen += PlainTxtLen; *CipherTxtLen = 0; return CTR_SUCCESS; } // control the case that PlainTxt and CipherTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)(BlockLen - BufLen)); PlainTxt += BlockLen - BufLen; PlainTxtLen -= BlockLen - BufLen; // core part BlockCopy(CipherTxt, AlgInfo->Buffer); AES_Encrypt(ScheduledKey, CipherTxt); CipherTxt += BlockLen; while( PlainTxtLen>=BlockLen ) { BlockCopy(CipherTxt, PlainTxt); AES_Encrypt(ScheduledKey, CipherTxt); PlainTxt += BlockLen; CipherTxt += BlockLen; PlainTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen = PlainTxtLen; *CipherTxtLen -= PlainTxtLen; // control the case that PlainTxt and CipherTxt are the same buffer return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CBC_EncUpdate( AES_ALG_INFO *AlgInfo, // BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD PlainTxtLen, // 涝仿登绰 乞巩狼 官捞飘 荐 BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; // *CipherTxtLen = BufLen + PlainTxtLen; // No one block if( *CipherTxtLen<BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen += PlainTxtLen; *CipherTxtLen = 0; return CTR_SUCCESS; } // control the case that PlainTxt and CipherTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)(BlockLen - BufLen)); PlainTxt += BlockLen - BufLen; PlainTxtLen -= BlockLen - BufLen; // core part BlockXor(CipherTxt, AlgInfo->ChainVar, AlgInfo->Buffer); AES_Encrypt(ScheduledKey, CipherTxt); CipherTxt += BlockLen; while( PlainTxtLen>=BlockLen ) { BlockXor(CipherTxt, CipherTxt-BlockLen, PlainTxt); AES_Encrypt(ScheduledKey, CipherTxt); PlainTxt += BlockLen; CipherTxt += BlockLen; PlainTxtLen -= BlockLen; } BlockCopy(AlgInfo->ChainVar, CipherTxt-BlockLen); // save remained data memcpy(AlgInfo->Buffer, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen = PlainTxtLen; *CipherTxtLen -= PlainTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL OFB_EncUpdate( AES_ALG_INFO *AlgInfo, // BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD PlainTxtLen, // 涝仿登绰 乞巩狼 官捞飘 荐 BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *CipherTxtLen = BufLen + PlainTxtLen; // No one block if( *CipherTxtLen<BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen += PlainTxtLen; *CipherTxtLen = 0; return CTR_SUCCESS; } // control the case that PlainTxt and CipherTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)(BlockLen - BufLen)); PlainTxt += BlockLen - BufLen; PlainTxtLen -= BlockLen - BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(CipherTxt, AlgInfo->ChainVar, AlgInfo->Buffer); CipherTxt += BlockLen; while( PlainTxtLen>=BlockLen ) { AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(CipherTxt, AlgInfo->ChainVar, PlainTxt); PlainTxt += BlockLen; CipherTxt += BlockLen; PlainTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + PlainTxtLen; *CipherTxtLen -= PlainTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CFB_EncUpdate( AES_ALG_INFO *AlgInfo, // BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD PlainTxtLen, // 涝仿登绰 乞巩狼 官捞飘 荐 BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *CipherTxtLen = BufLen + PlainTxtLen; // No one block if( *CipherTxtLen<BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen += PlainTxtLen; *CipherTxtLen = 0; return CTR_SUCCESS; } // control the case that PlainTxt and CipherTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block memcpy(AlgInfo->Buffer+BufLen, PlainTxt, (int)(BlockLen - BufLen)); PlainTxt += BlockLen - BufLen; PlainTxtLen -= BlockLen - BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(AlgInfo->ChainVar, AlgInfo->ChainVar, AlgInfo->Buffer); BlockCopy(CipherTxt, AlgInfo->ChainVar); CipherTxt += BlockLen; while( PlainTxtLen>=BlockLen ) { AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(AlgInfo->ChainVar, AlgInfo->ChainVar, PlainTxt); BlockCopy(CipherTxt, AlgInfo->ChainVar); PlainTxt += BlockLen; CipherTxt += BlockLen; PlainTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, PlainTxt, (int)PlainTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + PlainTxtLen; *CipherTxtLen -= PlainTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL AES_EncUpdate( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD PlainTxtLen, // 涝仿登绰 乞巩狼 官捞飘 荐 BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { switch( AlgInfo->ModeID ) { case AI_ECB : return ECB_EncUpdate(AlgInfo, PlainTxt, PlainTxtLen, CipherTxt, CipherTxtLen); case AI_CBC : return CBC_EncUpdate(AlgInfo, PlainTxt, PlainTxtLen, CipherTxt, CipherTxtLen); case AI_OFB : return OFB_EncUpdate(AlgInfo, PlainTxt, PlainTxtLen, CipherTxt, CipherTxtLen); case AI_CFB : return CFB_EncUpdate(AlgInfo, PlainTxt, PlainTxtLen, CipherTxt, CipherTxtLen); default : return CTR_FATAL_ERROR; } } /************************************************************************** * */ static RET_VAL ECB_EncFinal( AES_ALG_INFO *AlgInfo, // BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; DWORD PaddByte; // Padding PaddByte = PaddSet(AlgInfo->Buffer, BufLen, BlockLen, AlgInfo->PadType); if( PaddByte>BlockLen ) return PaddByte; if( PaddByte==0 ) { *CipherTxtLen = 0; return CTR_SUCCESS; } // core part BlockCopy(CipherTxt, AlgInfo->Buffer); AES_Encrypt(ScheduledKey, CipherTxt); // *CipherTxtLen = BlockLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CBC_EncFinal( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; DWORD PaddByte; // Padding PaddByte = PaddSet(AlgInfo->Buffer, BufLen, BlockLen, AlgInfo->PadType); if( PaddByte>BlockLen ) return PaddByte; if( PaddByte==0 ) { *CipherTxtLen = 0; return CTR_SUCCESS; } // core part BlockXor(CipherTxt, AlgInfo->Buffer, AlgInfo->ChainVar); AES_Encrypt(ScheduledKey, CipherTxt); BlockCopy(AlgInfo->ChainVar, CipherTxt); // *CipherTxtLen = BlockLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL OFB_EncFinal( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; DWORD i; // Check Output Memory Size *CipherTxtLen = BlockLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); for( i=0; i<BufLen; i++) CipherTxt[i] = (BYTE) (AlgInfo->Buffer[i] ^ AlgInfo->ChainVar[i]); // *CipherTxtLen = BufLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CFB_EncFinal( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *CipherTxtLen = BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(AlgInfo->ChainVar, AlgInfo->ChainVar, AlgInfo->Buffer); memcpy(CipherTxt, AlgInfo->ChainVar, BufLen); // *CipherTxtLen = BufLen; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL AES_EncFinal( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD *CipherTxtLen) // 免仿登绰 鞠龋巩狼 官捞飘 荐 { switch( AlgInfo->ModeID ) { case AI_ECB : return ECB_EncFinal(AlgInfo, CipherTxt, CipherTxtLen); case AI_CBC : return CBC_EncFinal(AlgInfo, CipherTxt, CipherTxtLen); case AI_OFB : return OFB_EncFinal(AlgInfo, CipherTxt, CipherTxtLen); case AI_CFB : return CFB_EncFinal(AlgInfo, CipherTxt, CipherTxtLen); default : return CTR_FATAL_ERROR; } } /************************************************************************** * */ RET_VAL AES_DecInit(AES_ALG_INFO *AlgInfo) { AlgInfo->BufLen = 0; if( AlgInfo->ModeID!=AI_ECB ) memcpy(AlgInfo->ChainVar, AlgInfo->IV, AES_BLOCK_LEN); return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL ECB_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 涝仿登绰 鞠龋巩狼 pointer DWORD CipherTxtLen, // 涝仿登绰 鞠龋巩狼 官捞飘 荐 BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; // *PlainTxtLen = BufLen + CipherTxtLen; // No one block if( BufLen+CipherTxtLen <= BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen += CipherTxtLen; *PlainTxtLen = 0; return CTR_SUCCESS; } // control the case that CipherTxt and PlainTxt are the same buffer if( CipherTxt==PlainTxt ) return CTR_FATAL_ERROR; // first block *PlainTxtLen = BufLen + CipherTxtLen; memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)(BlockLen - BufLen)); CipherTxt += BlockLen - BufLen; CipherTxtLen -= BlockLen - BufLen; // core part BlockCopy(PlainTxt, AlgInfo->Buffer); AES_Decrypt(ScheduledKey, PlainTxt); PlainTxt += BlockLen; while( CipherTxtLen>BlockLen ) { BlockCopy(PlainTxt, CipherTxt); AES_Decrypt(ScheduledKey, PlainTxt); CipherTxt += BlockLen; PlainTxt += BlockLen; CipherTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + CipherTxtLen; *PlainTxtLen -= CipherTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CBC_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 涝仿登绰 鞠龋巩狼 pointer DWORD CipherTxtLen, // 涝仿登绰 鞠龋巩狼 官捞飘 荐 BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; // Check Output Memory Size *PlainTxtLen = BufLen + CipherTxtLen; // No one block if( BufLen+CipherTxtLen <= BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen += CipherTxtLen; *PlainTxtLen = 0; return CTR_SUCCESS; } // control the case that CipherTxt and PlainTxt are the same buffer if( CipherTxt==PlainTxt ) return CTR_FATAL_ERROR; // first block *PlainTxtLen = BufLen + CipherTxtLen; memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)(BlockLen - BufLen)); CipherTxt += BlockLen - BufLen; CipherTxtLen -= BlockLen - BufLen; // core part BlockCopy(PlainTxt, AlgInfo->Buffer); AES_Decrypt(ScheduledKey, PlainTxt); BlockXor(PlainTxt, PlainTxt, AlgInfo->ChainVar); PlainTxt += BlockLen; if( CipherTxtLen<=BlockLen ) { BlockCopy(AlgInfo->ChainVar, AlgInfo->Buffer); } else { if( CipherTxtLen>BlockLen ) { BlockCopy(PlainTxt, CipherTxt); AES_Decrypt(ScheduledKey, PlainTxt); BlockXor(PlainTxt, PlainTxt, AlgInfo->Buffer); CipherTxt += BlockLen; PlainTxt += BlockLen; CipherTxtLen -= BlockLen; } while( CipherTxtLen>BlockLen ) { BlockCopy(PlainTxt, CipherTxt); AES_Decrypt(ScheduledKey, PlainTxt); BlockXor(PlainTxt, PlainTxt, CipherTxt-BlockLen); CipherTxt += BlockLen; PlainTxt += BlockLen; CipherTxtLen -= BlockLen; } BlockCopy(AlgInfo->ChainVar, CipherTxt-BlockLen); } // save remained data memcpy(AlgInfo->Buffer, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + CipherTxtLen; *PlainTxtLen -= CipherTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL OFB_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 涝仿登绰 鞠龋巩狼 pointer DWORD CipherTxtLen, // 涝仿登绰 鞠龋巩狼 官捞飘 荐 BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *PlainTxtLen = BufLen + CipherTxtLen; // No one block if( BufLen+CipherTxtLen <= BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen += CipherTxtLen; *PlainTxtLen = 0; return CTR_SUCCESS; } // control the case that CipherTxt and PlainTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block *PlainTxtLen = BufLen + CipherTxtLen; memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)(BlockLen - BufLen)); CipherTxt += BlockLen - BufLen; CipherTxtLen -= BlockLen - BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(PlainTxt, AlgInfo->ChainVar, AlgInfo->Buffer); PlainTxt += BlockLen; while( CipherTxtLen>BlockLen ) { AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(PlainTxt, AlgInfo->ChainVar, CipherTxt); CipherTxt += BlockLen; PlainTxt += BlockLen; CipherTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + CipherTxtLen; *PlainTxtLen -= CipherTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ static RET_VAL CFB_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 涝仿登绰 鞠龋巩狼 pointer DWORD CipherTxtLen, // 涝仿登绰 鞠龋巩狼 官捞飘 荐 BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *PlainTxtLen = BufLen + CipherTxtLen; // No one block if( BufLen+CipherTxtLen <= BlockLen ) { memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen += CipherTxtLen; *PlainTxtLen = 0; return CTR_SUCCESS; } // control the case that CipherTxt and PlainTxt are the same buffer if( PlainTxt==CipherTxt ) return CTR_FATAL_ERROR; // first block *PlainTxtLen = BufLen + CipherTxtLen; memcpy(AlgInfo->Buffer+BufLen, CipherTxt, (int)(BlockLen - BufLen)); CipherTxt += BlockLen - BufLen; CipherTxtLen -= BlockLen - BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(PlainTxt, AlgInfo->ChainVar, AlgInfo->Buffer); BlockCopy(AlgInfo->ChainVar, AlgInfo->Buffer); PlainTxt += BlockLen; while( CipherTxtLen>BlockLen ) { AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(PlainTxt, AlgInfo->ChainVar, CipherTxt); BlockCopy(AlgInfo->ChainVar, CipherTxt); CipherTxt += BlockLen; PlainTxt += BlockLen; CipherTxtLen -= BlockLen; } // save remained data memcpy(AlgInfo->Buffer, CipherTxt, (int)CipherTxtLen); AlgInfo->BufLen = (AlgInfo->BufLen&0xF0000000) + CipherTxtLen; *PlainTxtLen -= CipherTxtLen; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL AES_DecUpdate( AES_ALG_INFO *AlgInfo, BYTE *CipherTxt, // 鞠龋巩捞 免仿瞪 pointer DWORD CipherTxtLen, // 免仿登绰 鞠龋巩狼 官捞飘 荐 BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD *PlainTxtLen) // 涝仿登绰 乞巩狼 官捞飘 荐 { switch( AlgInfo->ModeID ) { case AI_ECB : return ECB_DecUpdate(AlgInfo, CipherTxt, CipherTxtLen, PlainTxt, PlainTxtLen); case AI_CBC : return CBC_DecUpdate(AlgInfo, CipherTxt, CipherTxtLen, PlainTxt, PlainTxtLen); case AI_OFB : return OFB_DecUpdate(AlgInfo, CipherTxt, CipherTxtLen, PlainTxt, PlainTxtLen); case AI_CFB : return CFB_DecUpdate(AlgInfo, CipherTxt, CipherTxtLen, PlainTxt, PlainTxtLen); default : return CTR_FATAL_ERROR; } } /************************************************************************** * */ RET_VAL ECB_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; RET_VAL ret; // Check Output Memory Size if( BufLen==0 ) { *PlainTxtLen = 0; return CTR_SUCCESS; } *PlainTxtLen = BlockLen; if( BufLen!=BlockLen ) return CTR_CIPHER_LEN_ERROR; // core part BlockCopy(PlainTxt, AlgInfo->Buffer); AES_Decrypt(ScheduledKey, PlainTxt); // Padding Check ret = PaddCheck(PlainTxt, BlockLen, AlgInfo->PadType); if( ret==(DWORD)-3 ) return CTR_PAD_CHECK_ERROR; if( ret==(DWORD)-1 ) return CTR_FATAL_ERROR; *PlainTxtLen = BlockLen - ret; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL CBC_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BlockLen=AES_BLOCK_LEN, BufLen=AlgInfo->BufLen; RET_VAL ret; // Check Output Memory Size if( BufLen==0 ) { *PlainTxtLen = 0; return CTR_SUCCESS; } *PlainTxtLen = BlockLen; if( BufLen!=BlockLen ) return CTR_CIPHER_LEN_ERROR; // core part BlockCopy(PlainTxt, AlgInfo->Buffer); AES_Decrypt(ScheduledKey, PlainTxt); BlockXor(PlainTxt, PlainTxt, AlgInfo->ChainVar); BlockCopy(AlgInfo->ChainVar, AlgInfo->Buffer); // Padding Check ret = PaddCheck(PlainTxt, BlockLen, AlgInfo->PadType); if( ret==(DWORD)-3 ) return CTR_PAD_CHECK_ERROR; if( ret==(DWORD)-1 ) return CTR_FATAL_ERROR; *PlainTxtLen = BlockLen - ret; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL OFB_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD i, BufLen=AlgInfo->BufLen; // Check Output Memory Size *PlainTxtLen = BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); for( i=0; i<BufLen; i++) PlainTxt[i] = (BYTE) (AlgInfo->Buffer[i] ^ AlgInfo->ChainVar[i]); *PlainTxtLen = BufLen; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL CFB_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 乞巩捞 免仿瞪 pointer DWORD *PlainTxtLen) // 免仿登绰 乞巩狼 官捞飘 荐 { DWORD *ScheduledKey=AlgInfo->RoundKey; DWORD BufLen=AlgInfo->BufLen; // Check Output Memory Size *PlainTxtLen = BufLen; // core part AES_Encrypt(ScheduledKey, AlgInfo->ChainVar); BlockXor(AlgInfo->ChainVar, AlgInfo->ChainVar, AlgInfo->Buffer); memcpy(PlainTxt, AlgInfo->ChainVar, BufLen); *PlainTxtLen = BufLen; // return CTR_SUCCESS; } /************************************************************************** * */ RET_VAL AES_DecFinal( AES_ALG_INFO *AlgInfo, BYTE *PlainTxt, // 涝仿登绰 乞巩狼 pointer DWORD *PlainTxtLen) // 涝仿登绰 乞巩狼 官捞飘 荐 { switch( AlgInfo->ModeID ) { case AI_ECB : return ECB_DecFinal(AlgInfo, PlainTxt, PlainTxtLen); case AI_CBC : return CBC_DecFinal(AlgInfo, PlainTxt, PlainTxtLen); case AI_OFB : return OFB_DecFinal(AlgInfo, PlainTxt, PlainTxtLen); case AI_CFB : return CFB_DecFinal(AlgInfo, PlainTxt, PlainTxtLen); default : return CTR_FATAL_ERROR; } } /*************** END OF FILE **********************************************/ |
AES.C文件
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/*************** Header files *********************************************/ #include "aes.h" /*************** Assertions ***********************************************/ /*************** New Data Types *******************************************/ typedef struct { DWORD k_len; DWORD RK[64]; } RIJNDAEL_CIPHER_KEY; /*************** Definitions / Macros ************************************/ #define u1byte BYTE #define u4byte DWORD #define rotl ROTL_DWORD #define rotr ROTR_DWORD #define byte(x,n) ((u1byte)((x) >> (8 * n))) #define LARGE_TABLES #define ff_mult(a,b) (a && b ? pow_tab[(log_tab[a] + log_tab[b]) % 255] : 0) #ifdef LARGE_TABLES #define ls_box(x) / ( fl_tab[0][byte(x, 0)] ^ / fl_tab[1][byte(x, 1)] ^ / fl_tab[2][byte(x, 2)] ^ / fl_tab[3][byte(x, 3)] ) #else #define ls_box(x) / ((u4byte)sbx_tab[byte(x, 0)] << 0) ^ / ((u4byte)sbx_tab[byte(x, 1)] << 8) ^ / ((u4byte)sbx_tab[byte(x, 2)] << 16) ^ / ((u4byte)sbx_tab[byte(x, 3)] << 24) #endif /*************** Global Variables *****************************************/ static u1byte log_tab[256]; static u1byte pow_tab[256]; static u1byte sbx_tab[256]; static u1byte isb_tab[256]; static u4byte rco_tab[ 10]; static u4byte ft_tab[4][256]; static u4byte it_tab[4][256]; #ifdef LARGE_TABLES static u4byte fl_tab[4][256]; static u4byte il_tab[4][256]; #endif static u4byte tab_gen = 0; /*************** Prototypes ***********************************************/ static void gen_tabs(void) { u4byte i, t; u1byte p, q; /* log and power tables for GF(2**8) finite field with */ /* 0x11b as modular polynomial - the simplest prmitive */ /* root is 0x11, used here to generate the tables */ log_tab[7] = 0; for(i = 0,p = 1; i < 256; ++i) { pow_tab[i] = (BYTE)p; log_tab[p] = (BYTE)i; p = (BYTE)(p ^ (p << 1) ^ (p & 0x80 ? 0x01b : 0)); } log_tab[1] = 0; p = 1; for(i = 0; i < 10; ++i) { rco_tab[i] = p; p = (BYTE)((p << 1) ^ (p & 0x80 ? 0x1b : 0)); } /* note that the affine byte transformation matrix in */ /* rijndael specification is in big endian format with */ /* bit 0 as the most significant bit. In the remainder */ /* of the specification the bits are numbered from the */ /* least significant end of a byte. */ for(i = 0; i < 256; ++i) { p = (BYTE)(i ? pow_tab[255 - log_tab[i]] : 0); q = p; q = (BYTE)((q >> 7) | (q << 1)); p ^= q; q = (BYTE)((q >> 7) | (q << 1)); p ^= q; q = (BYTE)((q >> 7) | (q << 1)); p ^= q; q = (BYTE)((q >> 7) | (q << 1)); p ^= q ^ 0x63; sbx_tab[i] = (u1byte)p; isb_tab[p] = (u1byte)i; } for(i = 0; i < 256; ++i) { p = sbx_tab[i]; #ifdef LARGE_TABLES t = p; fl_tab[0][i] = t; fl_tab[1][i] = rotl(t, 8); fl_tab[2][i] = rotl(t, 16); fl_tab[3][i] = rotl(t, 24); #endif t = ((u4byte)ff_mult(2, p)) | ((u4byte)p << 8) | ((u4byte)p << 16) | ((u4byte)ff_mult(3, p) << 24); ft_tab[0][i] = t; ft_tab[1][i] = rotl(t, 8); ft_tab[2][i] = rotl(t, 16); ft_tab[3][i] = rotl(t, 24); p = isb_tab[i]; #ifdef LARGE_TABLES t = p; il_tab[0][i] = t; il_tab[1][i] = rotl(t, 8); il_tab[2][i] = rotl(t, 16); il_tab[3][i] = rotl(t, 24); #endif t = ((u4byte)ff_mult(14, p)) | ((u4byte)ff_mult( 9, p) << 8) | ((u4byte)ff_mult(13, p) << 16) | ((u4byte)ff_mult(11, p) << 24); it_tab[0][i] = t; it_tab[1][i] = rotl(t, 8); it_tab[2][i] = rotl(t, 16); it_tab[3][i] = rotl(t, 24); } tab_gen = 1; }; #define star_x(x) (((x) & 0x7f7f7f7f) << 1) ^ ((((x) & 0x80808080) >> 7) * 0x1b) #define imix_col(y,x) / u = star_x(x); / v = star_x(u); / w = star_x(v); / t = w ^ (x); / (y) = u ^ v ^ w; / (y) ^= rotr(u ^ t, 8) ^ / rotr(v ^ t, 16) ^ / rotr(t,24) /************************************************************************** * * Function Description ... * * Return values: * - CTR_SUCCESS 窃荐啊 己傍利栏肺 荐青凳. * ... */ static void RIJNDAEL_KeySchedule( BYTE *UserKey, // 荤侩磊 厚剐虐 涝仿 DWORD k_len, // 荤侩磊 厚剐虐狼 DWORD 荐 DWORD *e_key) // 鞠龋侩 Round Key 积己/免仿 { u4byte i, t; //// if(!tab_gen) gen_tabs(); LITTLE_B2D(&(UserKey[ 0]), e_key[0]); LITTLE_B2D(&(UserKey[ 4]), e_key[1]); LITTLE_B2D(&(UserKey[ 8]), e_key[2]); LITTLE_B2D(&(UserKey[12]), e_key[3]); switch(k_len) { case 4: t = e_key[3]; for(i = 0; i < 10; ++i) { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; t ^= e_key[4 * i]; e_key[4 * i + 4] = t; t ^= e_key[4 * i + 1]; e_key[4 * i + 5] = t; t ^= e_key[4 * i + 2]; e_key[4 * i + 6] = t; t ^= e_key[4 * i + 3]; e_key[4 * i + 7] = t; } break; case 6: LITTLE_B2D(&(UserKey[16]), e_key[4]); LITTLE_B2D(&(UserKey[20]), e_key[5]); t = e_key[5]; for(i = 0; i < 8; ++i) { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; t ^= e_key[6 * i]; e_key[6 * i + 6] = t; t ^= e_key[6 * i + 1]; e_key[6 * i + 7] = t; t ^= e_key[6 * i + 2]; e_key[6 * i + 8] = t; t ^= e_key[6 * i + 3]; e_key[6 * i + 9] = t; t ^= e_key[6 * i + 4]; e_key[6 * i + 10] = t; t ^= e_key[6 * i + 5]; e_key[6 * i + 11] = t; } // loop6(i); break; case 8: LITTLE_B2D(&(UserKey[16]), e_key[4]); LITTLE_B2D(&(UserKey[20]), e_key[5]); LITTLE_B2D(&(UserKey[24]), e_key[6]); LITTLE_B2D(&(UserKey[28]), e_key[7]); t = e_key[7]; for(i = 0; i < 7; ++i) { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; t ^= e_key[8 * i]; e_key[8 * i + 8] = t; t ^= e_key[8 * i + 1]; e_key[8 * i + 9] = t; t ^= e_key[8 * i + 2]; e_key[8 * i + 10] = t; t ^= e_key[8 * i + 3]; e_key[8 * i + 11] = t; t = e_key[8 * i + 4] ^ ls_box(t); e_key[8 * i + 12] = t; t ^= e_key[8 * i + 5]; e_key[8 * i + 13] = t; t ^= e_key[8 * i + 6]; e_key[8 * i + 14] = t; t ^= e_key[8 * i + 7]; e_key[8 * i + 15] = t; } // loop8(i); break; } } /*************** Function ************************************************* * */ RET_VAL AES_EncKeySchedule( BYTE *UserKey, // 荤侩磊 厚剐虐 涝仿 DWORD UserKeyLen, // 荤侩磊 厚剐虐狼 官捞飘 荐 AES_ALG_INFO *AlgInfo) // 鞠龋侩/汗龋侩 Round Key 积己/历厘 { RIJNDAEL_CIPHER_KEY *RK_Struct=(RIJNDAEL_CIPHER_KEY *) AlgInfo->RoundKey; DWORD *e_key=RK_Struct->RK; // 64 DWORDs DWORD k_len; // UserKey狼 辨捞啊 何利例茄 版快 error 贸府 if( (UserKeyLen!=16) && (UserKeyLen!=24) && (UserKeyLen!=32) ) return CTR_INVALID_USERKEYLEN; //// k_len = (UserKeyLen + 3) / 4; RK_Struct->k_len = k_len; RIJNDAEL_KeySchedule(UserKey, k_len, e_key); return CTR_SUCCESS; } /*************** Function ************************************************* * */ RET_VAL AES_DecKeySchedule( BYTE *UserKey, // 荤侩磊 厚剐虐 涝仿 DWORD UserKeyLen, // 荤侩磊 厚剐虐狼 官捞飘 荐 AES_ALG_INFO *AlgInfo) // 鞠龋侩/汗龋侩 Round Key 积己/历厘 { RIJNDAEL_CIPHER_KEY *RK_Struct=(RIJNDAEL_CIPHER_KEY *) AlgInfo->RoundKey; DWORD *d_key=RK_Struct->RK; // 64 DWORDs DWORD k_len, t_key[64]; u4byte i, t, u, v, w; // UserKey狼 辨捞啊 何利例茄 版快 error 贸府 if( (UserKeyLen!=16) && (UserKeyLen!=24) && (UserKeyLen!=32) ) return CTR_INVALID_USERKEYLEN; //// k_len = (UserKeyLen + 3) / 4; RK_Struct->k_len = k_len; RIJNDAEL_KeySchedule(UserKey, k_len, t_key); d_key[0] = t_key[4 * k_len + 24]; d_key[1] = t_key[4 * k_len + 25]; d_key[2] = t_key[4 * k_len + 26]; d_key[3] = t_key[4 * k_len + 27]; for( i=4; i<4*(k_len+6); i+=4) { imix_col(d_key[i+0], t_key[4*k_len+24-i+0]); imix_col(d_key[i+1], t_key[4*k_len+24-i+1]); imix_col(d_key[i+2], t_key[4*k_len+24-i+2]); imix_col(d_key[i+3], t_key[4*k_len+24-i+3]); } d_key[i+0] = t_key[4*k_len+24-i+0]; d_key[i+1] = t_key[4*k_len+24-i+1]; d_key[i+2] = t_key[4*k_len+24-i+2]; d_key[i+3] = t_key[4*k_len+24-i+3]; return CTR_SUCCESS; } /* DWORD A, B, C, D, T0, T1, *K=AlgInfo->RoundKey; //// if( UserKeyLen!=SEED_USER_KEY_LEN ) return CTR_INVALID_USERKEYLEN; //// BIG_B2D( &(UserKey[0]), A); BIG_B2D( &(UserKey[4]), B); BIG_B2D( &(UserKey[8]), C); BIG_B2D( &(UserKey[12]), D); T0 = A + C - KC0; T1 = B - D + KC0; K[0] = SEED_SL[0][(T0 )&0xFF] ^ SEED_SL[1][(T0>> 8)&0xFF] ^ SEED_SL[2][(T0>>16)&0xFF] ^ SEED_SL[3][(T0>>24)&0xFF]; K[1] = SEED_SL[0][(T1 )&0xFF] ^ SEED_SL[1][(T1>> 8)&0xFF] ^ SEED_SL[2][(T1>>16)&0xFF] ^ SEED_SL[3][(T1>>24)&0xFF];; EncRoundKeyUpdate0(K+ 2, A, B, C, D, KC1 ); EncRoundKeyUpdate1(K+ 4, A, B, C, D, KC2 ); EncRoundKeyUpdate0(K+ 6, A, B, C, D, KC3 ); EncRoundKeyUpdate1(K+ 8, A, B, C, D, KC4 ); EncRoundKeyUpdate0(K+10, A, B, C, D, KC5 ); EncRoundKeyUpdate1(K+12, A, B, C, D, KC6 ); EncRoundKeyUpdate0(K+14, A, B, C, D, KC7 ); EncRoundKeyUpdate1(K+16, A, B, C, D, KC8 ); EncRoundKeyUpdate0(K+18, A, B, C, D, KC9 ); EncRoundKeyUpdate1(K+20, A, B, C, D, KC10); EncRoundKeyUpdate0(K+22, A, B, C, D, KC11); EncRoundKeyUpdate1(K+24, A, B, C, D, KC12); EncRoundKeyUpdate0(K+26, A, B, C, D, KC13); EncRoundKeyUpdate1(K+28, A, B, C, D, KC14); EncRoundKeyUpdate0(K+30, A, B, C, D, KC15); // Remove sensitive data A = B = C = D = T0 = T1 = 0; K = NULL; // return CTR_SUCCESS; */ /*************** Macros ***************************************************/ #define f_nround(bo, bi, k) { / bo[0] = ft_tab[0][byte(bi[0],0)] / ^ ft_tab[1][byte(bi[1],1)] / ^ ft_tab[2][byte(bi[2],2)] / ^ ft_tab[3][byte(bi[3],3)] ^ k[0];/ bo[1] = ft_tab[0][byte(bi[1],0)] / ^ ft_tab[1][byte(bi[2],1)] / ^ ft_tab[2][byte(bi[3],2)] / ^ ft_tab[3][byte(bi[0],3)] ^ k[1];/ bo[2] = ft_tab[0][byte(bi[2],0)] / ^ ft_tab[1][byte(bi[3],1)] / ^ ft_tab[2][byte(bi[0],2)] / ^ ft_tab[3][byte(bi[1],3)] ^ k[2];/ bo[3] = ft_tab[0][byte(bi[3],0)] / ^ ft_tab[1][byte(bi[0],1)] / ^ ft_tab[2][byte(bi[1],2)] / ^ ft_tab[3][byte(bi[2],3)] ^ k[3];/ k += 4; / } #define i_nround(bo, bi, k) { / bo[0] = it_tab[0][byte(bi[0],0)] / ^ it_tab[1][byte(bi[3],1)] / ^ it_tab[2][byte(bi[2],2)] / ^ it_tab[3][byte(bi[1],3)] ^ k[0];/ bo[1] = it_tab[0][byte(bi[1],0)] / ^ it_tab[1][byte(bi[0],1)] / ^ it_tab[2][byte(bi[3],2)] / ^ it_tab[3][byte(bi[2],3)] ^ k[1];/ bo[2] = it_tab[0][byte(bi[2],0)] / ^ it_tab[1][byte(bi[1],1)] / ^ it_tab[2][byte(bi[0],2)] / ^ it_tab[3][byte(bi[3],3)] ^ k[2];/ bo[3] = it_tab[0][byte(bi[3],0)] / ^ it_tab[1][byte(bi[2],1)] / ^ it_tab[2][byte(bi[1],2)] / ^ it_tab[3][byte(bi[0],3)] ^ k[3];/ k += 4; / } #ifdef LARGE_TABLES #define f_lround(bo, bi, k) { / bo[0] = fl_tab[0][byte(bi[0],0)] / ^ fl_tab[1][byte(bi[1],1)] / ^ fl_tab[2][byte(bi[2],2)] / ^ fl_tab[3][byte(bi[3],3)] ^ k[0];/ bo[1] = fl_tab[0][byte(bi[1],0)] / ^ fl_tab[1][byte(bi[2],1)] / ^ fl_tab[2][byte(bi[3],2)] / ^ fl_tab[3][byte(bi[0],3)] ^ k[1];/ bo[2] = fl_tab[0][byte(bi[2],0)] / ^ fl_tab[1][byte(bi[3],1)] / ^ fl_tab[2][byte(bi[0],2)] / ^ fl_tab[3][byte(bi[1],3)] ^ k[2];/ bo[3] = fl_tab[0][byte(bi[3],0)] / ^ fl_tab[1][byte(bi[0],1)] / ^ fl_tab[2][byte(bi[1],2)] / ^ fl_tab[3][byte(bi[2],3)] ^ k[3];/ } #define i_lround(bo, bi, k) { / bo[0] = il_tab[0][byte(bi[0],0)] / ^ il_tab[1][byte(bi[3],1)] / ^ il_tab[2][byte(bi[2],2)] / ^ il_tab[3][byte(bi[1],3)] ^ k[0];/ bo[1] = il_tab[0][byte(bi[1],0)] / ^ il_tab[1][byte(bi[0],1)] / ^ il_tab[2][byte(bi[3],2)] / ^ il_tab[3][byte(bi[2],3)] ^ k[1];/ bo[2] = il_tab[0][byte(bi[2],0)] / ^ il_tab[1][byte(bi[1],1)] / ^ il_tab[2][byte(bi[0],2)] / ^ il_tab[3][byte(bi[3],3)] ^ k[2];/ bo[3] = il_tab[0][byte(bi[3],0)] / ^ il_tab[1][byte(bi[2],1)] / ^ il_tab[2][byte(bi[1],2)] / ^ il_tab[3][byte(bi[0],3)] ^ k[3];/ } #else #define f_rl(bo, bi, n, k) / bo[n] = (u4byte)sbx_tab[byte(bi[n],0)] ^ / rotl(((u4byte)sbx_tab[byte(bi[(n + 1) & 3],1)]), 8) ^ / rotl(((u4byte)sbx_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ / rotl(((u4byte)sbx_tab[byte(bi[(n + 3) & 3],3)]), 24) ^ *(k + n) #define i_rl(bo, bi, n, k) / bo[n] = (u4byte)isb_tab[byte(bi[n],0)] ^ / rotl(((u4byte)isb_tab[byte(bi[(n + 3) & 3],1)]), 8) ^ / rotl(((u4byte)isb_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ / rotl(((u4byte)isb_tab[byte(bi[(n + 1) & 3],3)]), 24) ^ *(k + n) #define f_lround(bo, bi, k) / f_rl(bo, bi, 0, k); / f_rl(bo, bi, 1, k); / f_rl(bo, bi, 2, k); / f_rl(bo, bi, 3, k) #define i_lround(bo, bi, k) / i_rl(bo, bi, 0, k); / i_rl(bo, bi, 1, k); / i_rl(bo, bi, 2, k); / i_rl(bo, bi, 3, k) #endif /*************** Function ************************************************* * */ void AES_Encrypt( void *CipherKey, // 鞠/汗龋侩 Round Key BYTE *Data) // 涝免仿阑 困茄 喉废阑 啊府虐绰 pointer { RIJNDAEL_CIPHER_KEY *RK_Struct=CipherKey; DWORD *e_key=RK_Struct->RK; // 64 DWORDs DWORD k_len=RK_Struct->k_len; u4byte b0[4], b1[4], *kp; LITTLE_B2D(&(Data[ 0]), b0[0]); LITTLE_B2D(&(Data[ 4]), b0[1]); LITTLE_B2D(&(Data[ 8]), b0[2]); LITTLE_B2D(&(Data[12]), b0[3]); // b0[0] ^= e_key[0]; b0[1] ^= e_key[1]; b0[2] ^= e_key[2]; b0[3] ^= e_key[3]; kp = e_key + 4; switch( k_len ) { case 8 : f_nround(b1, b0, kp); f_nround(b0, b1, kp); case 6 : f_nround(b1, b0, kp); f_nround(b0, b1, kp); case 4 : f_nround(b1, b0, kp); f_nround(b0, b1, kp); f_nround(b1, b0, kp); f_nround(b0, b1, kp); f_nround(b1, b0, kp); f_nround(b0, b1, kp); f_nround(b1, b0, kp); f_nround(b0, b1, kp); f_nround(b1, b0, kp); f_lround(b0, b1, kp); } // LITTLE_D2B(b0[0], &(Data[ 0])); LITTLE_D2B(b0[1], &(Data[ 4])); LITTLE_D2B(b0[2], &(Data[ 8])); LITTLE_D2B(b0[3], &(Data[12])); } /*************** Function ************************************************* * */ void AES_Decrypt( void *CipherKey, // 鞠/汗龋侩 Round Key BYTE *Data) // 涝免仿阑 困茄 喉废阑 啊府虐绰 pointer { RIJNDAEL_CIPHER_KEY *RK_Struct=CipherKey; DWORD *d_key=RK_Struct->RK; // 64 DWORDs DWORD k_len=RK_Struct->k_len; u4byte b0[4], b1[4], *kp; LITTLE_B2D(&(Data[ 0]), b0[0]); LITTLE_B2D(&(Data[ 4]), b0[1]); LITTLE_B2D(&(Data[ 8]), b0[2]); LITTLE_B2D(&(Data[12]), b0[3]); // b0[0] ^= d_key[0]; b0[1] ^= d_key[1]; b0[2] ^= d_key[2]; b0[3] ^= d_key[3]; kp = d_key + 4; switch( k_len ) { case 8 : i_nround(b1, b0, kp); i_nround(b0, b1, kp); case 6 : i_nround(b1, b0, kp); i_nround(b0, b1, kp); case 4 : i_nround(b1, b0, kp); i_nround(b0, b1, kp); i_nround(b1, b0, kp); i_nround(b0, b1, kp); i_nround(b1, b0, kp); i_nround(b0, b1, kp); i_nround(b1, b0, kp); i_nround(b0, b1, kp); i_nround(b1, b0, kp); i_lround(b0, b1, kp); } // LITTLE_D2B(b0[0], &(Data[ 0])); LITTLE_D2B(b0[1], &(Data[ 4])); LITTLE_D2B(b0[2], &(Data[ 8])); LITTLE_D2B(b0[3], &(Data[12])); } /*************** END OF FILE **********************************************/ |
下面是我针对上面封装的两个加密解密函数的实现， 很简单的， 密钥是固定的
你可以固定一个16个Byte的字符串， 也可以用我代码里面写死的东西， 0x10 到 0x1F
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static int AESEncode (const char* srcString, int srcLen, char** dstString, int* dstLen) { //16 * (trunc(string_length / 16) + 1)。 char *pOut=0; unsigned int len = 16 * (srcLen/16 + 1); BYTE UserKey[AES_USER_KEY_LEN]={0}; BYTE IV[AES_BLOCK_LEN]={0}; DWORD UKLen, IVLen, SrcLen, DstLen; RET_VAL ret; AES_ALG_INFO AlgInfo; int eelen = 0; UKLen = 16; IVLen = 16; #ifdef _DEBUG int t = 0x10; for (int i=0; i<16; i++) { UserKey[i] = t+i; } #else snprintf ((char*)UserKey, sizeof(UserKey)-1, "%s", g_Config.encryptKey); #endif pOut = (char*)calloc (1, len+4); if (pOut == NULL) return -1; DstLen = len; // AES_SetAlgInfo(AES_ModeType, AES_PadType, IV, &AlgInfo); // Encryption ret = AES_EncKeySchedule(UserKey, UKLen, &AlgInfo); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_EncKeySchedule() returns."); safe_free (pOut); return -1; } ret = AES_EncInit(&AlgInfo); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_EncInit() returns."); safe_free (pOut); return -1; } ret = AES_EncUpdate(&AlgInfo, (unsigned char*)srcString, SrcLen, (unsigned char*)pOut, &DstLen); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_EncUpdate() returns."); safe_free (pOut); return -1; } eelen = DstLen; ret = AES_EncFinal(&AlgInfo, (unsigned char*)pOut+eelen, &DstLen); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_EncFinal() returns."); safe_free (pOut); return -1; } eelen += DstLen; *dstLen = eelen; *dstString = pOut; return 0; } static int AESDecode (const char* srcString, int srcLen, char** dstString, int* dstLen) { //FILE *pIn, *pOut; char* pOut = 0; unsigned char UserKey[AES_USER_KEY_LEN]={0}; unsigned char IV[AES_BLOCK_LEN]={0}; //unsigned char SrcData[1024+32], DstData[1024+32]; unsigned int UKLen, IVLen; unsigned int SrcLen, DstLen; RET_VAL ret; AES_ALG_INFO AlgInfo; int ddlen = 0; SrcLen = srcLen; pOut = (char*)calloc(1, SrcLen+2); if (pOut == NULL) return -1; DstLen = SrcLen; UKLen = 16; IVLen = 16; #ifdef _DEBUG int t = 0x10; for (int i=0; i<16; i++) { UserKey[i] = t+i; } #else snprintf ((char*)UserKey, sizeof(UserKey)-1, "%s", g_Config.encryptKey); #endif AES_SetAlgInfo(AES_ModeType, AES_PadType, IV, &AlgInfo); //Decryption //if( ModeType==AI_ECB || ModeType==AI_CBC ) ret = AES_DecKeySchedule(UserKey, UKLen, &AlgInfo); //else if( ModeType==AI_OFB || ModeType==AI_CFB ) // ret = AES_EncKeySchedule(UserKey, UKLen, &AlgInfo); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_DecKeySchedule() returns."); safe_free (pOut); return -1; } ret = AES_DecInit(&AlgInfo); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_DecInit() returns."); safe_free (pOut); return -1; } ret = AES_DecUpdate(&AlgInfo, (unsigned char*)srcString, SrcLen, (unsigned char*)pOut, &DstLen); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_DecUpdate() returns."); safe_free (pOut); return -1; } ddlen = DstLen; ret = AES_DecFinal(&AlgInfo, (unsigned char*)pOut+ddlen, &DstLen); if( ret!=CTR_SUCCESS ) { writelog(LOG_DEBUG, "AES_DecFinal() returns."); safe_free (pOut); return -1; } ddlen += DstLen; *dstLen = ddlen; *dstString = pOut; return 0; } |
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