AES加密算法源代碼（c語言版）

1、AES加密算法源代碼（c語版）/AES.h#define decrypt TRUE#define encrypt FALSE#define TYPE BOOLtypedef struct _AESint Nb;int Nr;int Nk;unsigned long *Word;unsigned long *State;AES;/*加密數(shù)據(jù)，這個函數(shù)和下的InvCipher于演的，只作了次加密或解密。要進(jìn)數(shù)據(jù)量加解密只需對這兩個函數(shù)稍作修改就可以了。byte *input 明byte *inSize 明長byte *out 密存放的地byte *key 密鑰keybyte *keySize 密鑰

2、長*/void Cipher(unsigned char* input,int inSize,unsigned char* out,unsigned char* key,int keySize);/*解密數(shù)據(jù)byte *input 密int *inSize 密長byte *out 明存放的地byte *key 密鑰keyint *keySize 密鑰長*/void InvCipher(unsigned char* input,int inSize,unsigned char* out,unsigned char* key,int keySize);/*成加密的參數(shù)AES結(jié)構(gòu)int inSize

3、 塊byte* 密鑰int 密鑰長unsigned long 屬性(標(biāo)實類型)返回AES結(jié)構(gòu)指針*/AES *InitAES(AES *aes,int inSize,unsigned char* key,int keySize, TYPE type);/*成加密的參數(shù)AES結(jié)構(gòu)int inSize 塊byte* 密鑰byte* 密鑰int 密鑰長返回AES結(jié)構(gòu)指針*/AES *InitAES(int inSize,unsigned char* key,int keySize, BOOL );/*加密時進(jìn)Nr輪運算AES * aes 運時參數(shù)*/void CipherLoop(AES *aes)

4、;/*解密時進(jìn)Nr輪逆運算AES * aes 運時參數(shù)*/void InvCipherLoop(AES *aes);/*釋放AES結(jié)構(gòu)和State和密鑰庫word*/void freeAES(AES *aes);/AES.cpp#include "stdafx.h"#include <windows.h>#include <stdio.h>#include "AES.h"unsigned char* SubWord(unsigned char* word);unsigned long* keyExpansion(unsigned

5、char* key, int Nk, int Nr,int);/*加密數(shù)據(jù)byte *input 明byte *inSize 明長byte *out 密存放的地byte *key 密鑰keybyte *keySize 密鑰長*/void Cipher(unsigned char* input, int inSize, unsigned char* out, unsigned char* key, int keySize)AES aes ;InitAES(&aes,inSize,key,keySize,encrypt);/while(.)memcpy(aes.State,input,in

6、Size);CipherLoop(&aes);memcpy(out,aes.State,inSize);/*解密數(shù)據(jù)byte *input 密int *inSize 密長byte *out 明存放的地byte *key 密鑰keyint *keySize 密鑰長*/void InvCipher(unsigned char* input, int inSize, unsigned char* out, unsigned char* key, int keySize)void InvCipher(unsigned char* input, int inSize, unsigned char

7、* out, unsigned char* key, int keySize)AES aes;InitAES(&aes,inSize,key,keySize,decrypt);memcpy(aes.State,input,inSize);InvCipherLoop(&aes);memcpy(aes.State,out,inSize);/*成加密的參數(shù)AES結(jié)構(gòu)int inSize 塊byte* 密鑰int 密鑰長返回AES結(jié)構(gòu)指針*/AES *InitAES(AES *aes,int inSize, unsigned char *key, int keySize, TYPE t

8、ype)int Nb = inSize >>2,Nk = keySize >>2,Nr = Nb < Nk ? Nk:Nb+6;aes->Nb = Nb;aes->Nk = Nk;aes->Nr = Nr;aes->Word = keyExpansion(key,Nb,Nr,Nk);aes->State = new unsigned longNb+3;if(type)aes->State += 3;return aes;/*成加密的參數(shù)AES結(jié)構(gòu)int inSize 塊byte* 密鑰int 密鑰長返回AES結(jié)構(gòu)指針*/AES

9、*InitAES(int inSize, unsigned char* key, int keySize,unsigned long type)return InitAES(new AES(),inSize,key,keySize,type);/*/void CipherLoop(AES *aes)unsigned char temp4;unsigned long *word8 = aes->Word,*State = aes->State;int Nb = aes->Nb,Nr = aes->Nr;int r;for (r = 0; r < Nb; +r)Sta

10、ter = word8r;for (int round =1; round <Nr; +round)word8 += Nb;/*假設(shè)Nb=4;-| s0 | s1 | s2 | s3 | s0 | s1 | s2 | s3 |-| s4 | s5 | s6 | s7 |-| s8 | s9 | sa | sb |-| sc | sd | se | sf |-| | | | |-| | | | |-| | | | |-*/memcpy(State+Nb,State,12);/*Nb=4;-| s0 | | | |-| s4 | s5 | | |-| s8 | s9 | sa | |-| s

11、c | sd | se | sf |-| | s1 | s2 | s3 |-| | | s6 | s7 |-| | | | sb |-*/for(r =0; r<Nb; r+)/*temp = Sboxs0,Sboxs5,Sboxsa,Sboxsf;*/temp0 = Sbox*(unsigned char*)State);temp1 = Sbox*(unsigned char*)(State+1)+1);temp2 = Sbox*(unsigned char*)(State+2)+2);temp3 = Sbox*(unsigned char*)(State+3)+3);*(unsign

12、ed char*)State) = Log_02temp0 Log_03temp1 temp2 temp3;*(unsigned char*)State+1) = Log_02temp1 Log_03temp2 temp3 temp0;*(unsigned char*)State+2) = Log_02temp2 Log_03temp3 temp0 temp1;*(unsigned char*)State+3) = Log_02temp3 Log_03temp0 temp1 temp2;*State = word8r;State+;State -= Nb;memcpy(State+Nb,Sta

13、te,12);word8 += Nb;for(r =0; r<Nb; r+)*(unsigned char*)State) = Sbox*(unsigned char*)State;*(unsigned char*)State+1) = Sbox*(unsigned char*)(State+1)+1);*(unsigned char*)State+2) = Sbox*(unsigned char*)(State+2)+2);*(unsigned char*)State+3) = Sbox*(unsigned char*)(State+3)+3);*State = word8r;*Sta

14、te = word8r;State+;/*解密時進(jìn)Nr輪逆運算AES * aes 運時參數(shù)*/void InvCipherLoop(AES *aes)unsigned long *Word = aes->Word,*State = aes->State;int Nb = aes->Nb,Nr = aes->Nr;unsigned char temp4;int r =0;Word += Nb*Nr;for (r = 0; r < Nb; +r)Stater = Wordr;State -= 3;for (int round = Nr-1; round > 0;

15、 -round)/*假設(shè)Nb=4;-| | | | |-| | | | |-| | | | |-| s0 | s1 | s2 | s3 |-| s4 | s5 | s6 | s7 |-| s8 | s9 | sa | sb |-| sc | sd | se | sf |-*/memcpy(State,State+Nb,12);/*Nb=4;-| | | | s7 |-| | | sa | sb |-| | sd | se | sf |-| s0 | s1 | s2 | s3 |-| s4 | s5 | s6 | |-| s8 | s9 | | |-| sc | | | |-*/*/Word -

16、= Nb;State += Nb+2;for(r = Nb-1; r >= 0; r-)/*temp = iSboxs0,iSboxsd,iSboxsa,iSboxs7;*/temp0 = iSbox*(byte*)State;temp1 = iSbox*(byte*)(State-1)+1);temp2 = iSbox*(byte*)(State-2)+2);temp3 = iSbox*(byte*)(State-3)+3);*(unsigned long*)temp = Wordr;*(unsigned char*)State = Log_0etemp0 Log_0btemp1 Lo

17、g_0dtemp2 Log_09temp3;*(unsigned char*)State+1) = Log_0etemp1 Log_0btemp2 Log_0dtemp3 Log_09temp0;*(unsigned char*)State+2) = Log_0etemp2 Log_0btemp3 Log_0dtemp0 Log_09temp1;*(unsigned char*)State+3) = Log_0etemp3 Log_0btemp0 Log_0dtemp1 Log_09temp2;State -;State -= 2;Word -= Nb;memcpy(State,State+N

18、b,12);State += Nb+2;for(r = Nb-1; r >= 0; r-)*(unsigned char*)State = iSbox*(unsigned char*)State;*(unsigned char*)State+1) = iSbox*(unsigned char*)(State-1)+1);*(unsigned char*)State+2) = iSbox*(unsigned char*)(State-2)+2);*(unsigned char*)State+3) = iSbox*(unsigned char*)(State-3)+3);*State = W

19、ordr;State -;/*-*|k0|k1|k2|k3|k4|k5|k6|k7|k8|k9|.|Nk*4|*-*Nr輪密鑰庫*每個密鑰列長度為Nb*-*| k0 | k1 | k2 | k3 |*-*| k4 | k5 | k6 | k7 |*-*| k8 | k9 | ka | kb |*-*| kc | kd | ke | kf |*-*/unsigned long* keyExpansion(byte* key, int Nb, int Nr, int Nk)unsigned long *w =new unsigned longNb * (Nr+1); / 4 columns of bytes corresponds to a wordmemcpy(w,key,Nk<<