DES加密算法代碼

1、實(shí)驗(yàn)二 DES加密算法用C語言編寫DES算法代碼，代碼如下：#include #include /明文IP置換坐標(biāo)int DataIP = 58,50,42,34,26,18,10,2, 60,52,44,36,28,20,12,4, 62,54,46,38,30,22,14,6, 64,56,48,40,32,24,16,8, 57,49,41,33,25,17,9,1, 59,51,43,35,27,19,11,3, 61,53,45,37,29,21,13,5, 63,55,47,39,31,23,15,7;char preData8; /用戶輸入的明文char preKey8; /用戶

2、輸入的密鑰int Data6464; /8個(gè)明文通過十進(jìn)制轉(zhuǎn)二進(jìn)制得到的64bit明文int Key6464; /8個(gè)密鑰通過十進(jìn)制轉(zhuǎn)二進(jìn)制得到的64bit密鑰int DataTemp64; /Data64通過IP置換得到的64bit明文，用于得到L0和R0int L032,R032; int flagDorK=0; /標(biāo)志位，如果是1的時(shí)候表示明文，是0的時(shí)候表示密文/此段全局變量服務(wù)于段雪琦所寫所用函數(shù)/PC_1置換坐標(biāo)表int PC_156 = 57,49,41,33,25,17,9, 1,58,50,42,34,26,18, 10,2,59,51,43,35,27, 19,11,3,6

3、0,52,44,36, 63,55,47,39,31,23,15, 7,62,54,46,38,30,22, 14,6,61,53,45,37,29, 21,13,5,28,20,12,4;/PC_2置換坐標(biāo)表int PC_248 = 14,17,11,24,1,5, 3,28,15,6,21,10, 23,19,12,4,26,8, 16,7,27,20,13,2, 41,52,31,37,47,55, 30,40,51,45,33,48, 44,49,39,56,34,53, 46,42,50,36,29,32;/迭代左移位數(shù)數(shù)組int lsi16=1,1,2,2,2,2,2,2,1,2,

4、2,2,2,2,2,1;/逆初始置換表IP-1 int IP_1_Table64 = 39,7,47,15,55,23,63,31, 38,6,46,14,54,22,62,30, 37,5,45,13,53,21,61,29, 36,4,44,12,52,20,60,28, 35,3,43,11,51,19,59,27, 34,2,42,10,50,18,58,26, 33,1,41,9,49,17,57,25, 32,0,40,8,48,16,56,24;int KeyOutBox48=0; /輸出的子密鑰數(shù)組int lsinumber=0; /用于記錄是第i次加密，lsinumber等于

5、i/sherry第二個(gè)函數(shù)所用/f操作中將R0擴(kuò)展為48位的置換坐標(biāo)表int fExpand4848 = 32,1,2,3,4,5, 4,5,6,7,8,9, 8,9,10,11,12,13, 12,13,14,15,16,17, 16,17,18,19,20,21, 20,21,22,23,24,25, 24,25,26,27,28,29, 28,29,30,31,32,31;/P變換置換坐標(biāo)表int fPChange32=16,7,20,21, 29,12,28,17, 1,15,23,26, 5,18,31,10, 2,8,24,14, 32,27,3,9, 19,13,30,6, 22

6、,11,4,25;/S盒置換坐標(biāo)表int sBox8416 = 14, 4,13, 1, 2,15,11, 8, 3,10, 6,12, 5, 9, 0, 7, 0,15, 7, 4,14, 2,13, 1,10, 6,12,11, 9, 5, 3, 8, 4, 1,14, 8,13, 6, 2,11,15,12, 9, 7, 3,10, 5, 0,15,12, 8, 2, 4, 9, 1, 7, 5,11, 3,14,10, 0, 6,13,15, 1, 8,14, 6,11, 3, 4, 9, 7, 2,13,12, 0, 5,10, 3,13, 4, 7,15, 2, 8,14,12,

7、0, 1,10, 6, 9,11, 5, 0,14, 4,11,10, 4,13, 1, 5, 8,12, 6, 9, 3, 2,15,13, 8,10, 1, 3,15, 4, 2,11, 6, 7,12, 0, 5,14, 9,10, 0, 9,14, 6, 3,15, 5, 1,13,12, 7,11, 4, 2, 8,13, 7, 0, 9, 3, 4, 6,10, 2, 8, 5,14,12,11,15, 1,13, 6, 4, 9, 8,15, 3, 0,11, 1, 2,12, 5,10,14, 7, 1,10,13, 0, 6, 9, 8, 7, 4,15,14, 3,11,

8、5, 2,12, 7,13,14, 3, 0, 6, 9,10, 1, 2, 8, 5,11,12, 4,15,13, 8,11, 5, 6,15, 0, 3, 4, 7, 2,12, 1,10,14, 9,10, 6, 9, 0,12,11, 7,13,15, 1, 3,14, 5, 2, 8, 4, 3,15, 0, 6,10, 1,13, 8, 9, 4, 5,11,12, 7, 2,14, 2,12, 4, 1, 7,10,11, 6, 8, 5, 3,15,13, 0,14, 9,14,11, 2,12, 4, 7,13, 1, 5, 0,15,10, 3, 9, 8, 6,10,

9、6, 9, 0,12,11, 7, 8,15, 9,12, 5, 6, 3, 0,14,11, 8,12, 7, 1,14, 2,13, 6,15, 0, 9,10, 4, 5, 3,12, 1,10,15, 9, 2, 6, 8, 0,13, 3, 4,14, 7, 5,11,10,15, 4, 2, 7,12, 9, 5, 6, 1,13,14, 0,11, 3, 8, 9,14,15, 5, 2, 8,12, 3, 7, 0, 4,10, 1,13,11, 6, 4, 3, 2,12, 9, 5,15,10,11,14, 1, 7, 6, 0, 8,13, 4,11, 2,14,15,

10、0, 8,13, 3,12, 9, 7, 5,10, 6, 1,13, 0,11, 7, 4, 9, 1,10,14, 3, 5,12, 2,15, 8, 6, 1, 4,11,13,12, 3, 7,14,10,15, 6, 8, 0, 5, 9, 2, 6,11,13, 8, 1, 4,10, 7, 9, 5, 0,15,14, 2, 3,12,13, 2, 8, 4, 6,15,11, 1,10, 9, 3,14, 5, 0,12, 7, 1,15,13, 8,10, 3, 7, 4,12, 5, 6,11, 0,14, 9, 2, 7,11, 4, 1, 9,12,14, 2, 0,

11、6,10,13,15, 3, 5, 8, 2, 1,14, 7, 4,10, 8,13,15,12, 9, 0, 3, 5, 6,11;/*-生成R0 L0-* *將輸入的分別為8個(gè)的明文和密鑰轉(zhuǎn)化為64bit的明文和密鑰,*分別放入Data64和Key64; *將生成的64bit的明文通過IP置換得到L0和R0 *-*/void R0andL0(char tempData8)int i,j,temp,y;int k=0; int tempBox64;int mtemp=0;for(i=0; i=0;j-)temp=tempDatai&(1j);if(0 = temp)tempBoxk=0;k

12、+;elsetempBoxk=1;k+; /當(dāng)flagDorK等于1時(shí)，為明文轉(zhuǎn)化，生成L0和R0if(flagDorK=1)printf(轉(zhuǎn)化為64bit明文n);for(y=0;y64;y+)Data64y=tempBoxy;tempBoxy=0;printf(%d,Data64y);if(y= 7|y=15|y=23|y=39|y=47|y=55|y=63) printf( );if(y=31)printf(n);printf(n);for(y=0;y64;y+) DataTempy=Data64DataIPy-1; if(y32) L0y=DataTempy; else R0y-32=

13、DataTempy; printf(n明文Data過IP置換后得到：n); printf(L0: ); for(i=0;i32;i+) printf(%d,L0i); if(i= 7|i=15|i=23|i=31) printf( ); printf(nR0: ); for(i=0;i32;i+) printf(%d,R0i); if(i= 7|i=15|i=23|i=31) printf( ); printf(nn);/當(dāng)flagDorK等于0時(shí)，為密鑰轉(zhuǎn)化，生成密鑰Key64if(flagDorK=0)printf(轉(zhuǎn)化為64bit的密鑰n);for(y=0;y64;y+)Key64y=t

14、empBoxy;tempBoxy=0;printf(%d,Key64y);if(y= 7|y=15|y=23|y=39|y=47|y=55|y=63) printf( );if(y=31)printf(n);printf(nn);/*-輸入函數(shù)-*-*/void Input()int i; printf(請輸入明文：n); for(i=0;i8;i+) scanf(%c,&preDatai); flagDorK=1;R0andL0(preData);getchar();printf(請輸入密鑰：n);for(i=0;i8;i+)scanf(%c,&preKeyi);flagDorK=0;R0a

15、ndL0(preKey);/IP逆置換 int DES_IP_1_Transform(int data64) int cnt; int temp64; for(cnt = 0; cnt 64; cnt+) tempcnt = dataIP_1_Tablecnt; memcpy(data,temp,64); for(cnt = 0; cnt 64; cnt+) printf(%d,datacnt); printf(n); return 0; /二進(jìn)制轉(zhuǎn)換成字節(jié) int BitToByte(int bit8,int *ch) int cnt; for(cnt = 0;cnt 8; cnt+) *c

16、h |= *(bit + cnt)cnt; for(cnt = 0;cnt 8; cnt+)printf(%d,chcnt); return 0; /*-生成子密鑰函數(shù)-*傳進(jìn)來的64bit密鑰通過PC_1置換坐標(biāo)表變成56bit子密鑰*此函數(shù)被調(diào)用16次即得到16個(gè)子密鑰 *-*/void subKey(int K64)int K056=0;int KeyOut56=0;/*檢測所用*/int K056=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,1,2,3,4,5,6,7,8,9,10

17、,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27;int tempC28=0;int tempD28=0;int temp56=0; int i=0,j=0,lsisum=0;/lsisum為算出要移多少位for(i=0;i=lsinumber-1;i+)lsisum+=lsii;/得到第一個(gè)56位for(j=0;j56;j+)K0j=KPC_1j-1; /移位操作 lsisum為移多少位，不論Ki中i為多少都可以用這個(gè)來做 /tempC相當(dāng)于教程中C0移位后的。tempD相當(dāng)于教程中D0移位后的。for(i=0;i28-lsisum;i+

18、)tempCi=K0i+lsisum;for(i=28-lsisum;i28;i+)tempCi=K0i+lsisum-28;for(i=28;i28-lsisum;i+)tempDi-28=K0i+lsisum;for(i=28-lsisum;i56;i+)tempDi-28=K0i+lsisum-28; /temp為移位后的56位整體for(i=0;i28;i+)tempi=tempCi;for(i=28;i56;i+)tempi=tempDi-28;/KeyOut數(shù)組是得到的Klsinumber，第lsinumber次加密/丟棄8位for(j=0;j48;j+)KeyOutj=tempP

19、C_2j-1;/檢測printf(第%d個(gè)子密鑰n,lsinumber);for(i=0;i48;i+)printf(%d,KeyOuti);if(i= 7|i=15|i=23|i=31|i=39)printf( );KeyOutBoxi=KeyOuti;printf(n);/*-f變換函數(shù)-*先將傳進(jìn)來的32bit的R0擴(kuò)充至48bit *將48bit與子密鑰作異或運(yùn)算 *通過s盒和p變換后得到的ftemp與L0進(jìn)行異或運(yùn)算 *將R0賦值給L0,ftemp賦值給R0,得到新的L0和R0 *-*/void fFuction(int flag)/int KeyOut48=1,0,3,0,5,0,0,8,9,10,0,12,0,0,15,0,17,18,19,0,21,22,0,0,25,26,0,28,29,0,31,32,0,34,35,36,0,0,39,0,41,42,43,0,0,46,0,48;int Rtemp4848=0;int RKxor48=0;int sBoxBIT84=0;int sBox3232=0;int ftemp32=0;int i=0,j=0,k=0;int row=0,column=0,sBoxNum=0,temp=0;int plainBits64; int cipherBl