RSA
#include if(b>a) //a中存放较大的数，b中存放较小的数 { int temp; temp=a; a=b; b=temp; } long n; while((n=a%b)!=0) { a=b; b=n; } return b; } //--------------------------------------- long cheng_niyuan(long a, long b) { for(long i=1; (i*a)%b!=1; i++); return i; } //--------------------------------------- int mi_mo(int a, int b, int n) { int K[100]; int top=-1; while(b) { top++; K[top]=(b%2); b/=2; } int c=0, f=1; for(; top>=0; top--) { c=2*c; f=(f*f)%n; if(K[top]==1) { c+=1; f=(f*a)%n; } } return f; } //--------------------------------------- int main() { int p=5,q=11; cout<<\"p=\"< cout<<\"请输入明文：\"< C=mi_mo(M, e, n); cout<<\"对应的密文为：\"< M=mi_mo(C, d, n); cout<<\"对应的明文为：\"< #include \"stdio.h\" #include \"memory.h\" #include \"time.h\" #include \"stdlib.h\" #define PLAIN_FILE_OPEN_ERROR -1 #define KEY_FILE_OPEN_ERROR -2 #define CIPHER_FILE_OPEN_ERROR -3 #define OK 1 typedef char ElemType; /*初始置换表IP*/ int IP_Table[64] = { 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, 56,48,40,32,24,16,8,0, 58,50,42,34,26,18,10,2, 60,52,44,36,28,20,12,4, 62,54,46,38,30,22,14,6}; /*逆初始置换表IP^-1*/ int IP_1_Table[64] = {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}; /*扩充置换表E*/ int E_Table[48] = {31, 0, 1, 2, 3, 4, 3, 4, 5, 6, 7, 8, 7, 8,9,10,11,12, 11,12,13,14,15,16, 15,16,17,18,19,20, 19,20,21,22,23,24, 23,24,25,26,27,28, 27,28,29,30,31, 0}; /*置换函数P*/ int P_Table[32] = {15,6,19,20,28,11,27,16, 0,14,22,25,4,17,30,9, 1,7,23,13,31,26,2,8, 18,12,29,5,21,10,3,24}; /*S盒*/ int S[8][4][16] = /*S1*/ {{{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}}, /*S2*/ {{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10}, {3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5}, {0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15}, {13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}}, /*S3*/ {{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}, {1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}}, /*S4*/ {{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}}, /*S5*/ {{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}, {4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14}, {11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}}, /*S6*/ {{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}}, /*S7*/ {{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1}, {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}}, /*S8*/ {{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}, {7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8}, {2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}}; /*置换选择1*/ int PC_1[56] = {56,48,40,32,24,16,8, 0,57,49,41,33,25,17, 9,1,58,50,42,34,26, 18,10,2,59,51,43,35, 62,54,46,38,30,22,14, 6,61,53,45,37,29,21, 13,5,60,52,44,36,28, 20,12,4,27,19,11,3}; /*置换选择2*/ int PC_2[48] = {13,16,10,23,0,4,2,27, 14,5,20,9,22,18,11,3, 25,7,15,6,26,19,12,1, 40,51,30,36,46,54,29,39, 50,44,32,46,43,48,38,55, 33,52,45,41,49,35,28,31}; /*对左移次数的规定*/ int MOVE_TIMES[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1}; int ByteToBit(ElemType ch,ElemType bit[8]); int BitToByte(ElemType bit[8],ElemType *ch); int Char8ToBit64(ElemType ch[8],ElemType bit[64]); int Bit64ToChar8(ElemType bit[64],ElemType ch[8]); int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]); int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]); int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]); int DES_ROL(ElemType data[56], int time); int DES_IP_Transform(ElemType data[64]); int DES_IP_1_Transform(ElemType data[64]); int DES_E_Transform(ElemType data[48]); int DES_P_Transform(ElemType data[32]); int DES_SBOX(ElemType data[48]); int DES_XOR(ElemType R[48], ElemType L[48],int count); int DES_Swap(ElemType left[32],ElemType right[32]); int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]); int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48], ElemType plainBlock[8]); int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile); int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile); /*字节转换成二进制*/ int ByteToBit(ElemType ch, ElemType bit[8]){ int cnt; for(cnt = 0;cnt < 8; cnt++){ *(bit+cnt) = (ch>>cnt)&1; } return 0; } /*二进制转换成字节*/ int BitToByte(ElemType bit[8],ElemType *ch){ int cnt; for(cnt = 0;cnt < 8; cnt++){ *ch |= *(bit + cnt)< /*将长度为8的字符串转为二进制位串*/ int Char8ToBit64(ElemType ch[8],ElemType bit[64]){ int cnt; for(cnt = 0; cnt < 8; cnt++){ ByteToBit(*(ch+cnt),bit+(cnt<<3)); } return 0; } /*将二进制位串转为长度为8的字符串*/ int Bit64ToChar8(ElemType bit[64],ElemType ch[8]){ int cnt; memset(ch,0,8); for(cnt = 0; cnt < 8; cnt++){ BitToByte(bit+(cnt<<3),ch+cnt); } return 0; } /*生成子密钥*/ int DES_MakeSubKeys(ElemType key[64],ElemType subKeys[16][48]){ ElemType temp[56]; int cnt; DES_PC1_Transform(key,temp);/*PC1置换*/ for(cnt = 0; cnt < 16; cnt++){/*16轮跌代，产生16个子密钥*/ DES_ROL(temp,MOVE_TIMES[cnt]);/*循环左移*/ DES_PC2_Transform(temp,subKeys[cnt]);/*PC2置换，产生子密钥*/ } return 0; } /*密钥置换1*/ int DES_PC1_Transform(ElemType key[64], ElemType tempbts[56]){ int cnt; for(cnt = 0; cnt < 56; cnt++){ tempbts[cnt] = key[PC_1[cnt]]; } return 0; } /*密钥置换2*/ int DES_PC2_Transform(ElemType key[56], ElemType tempbts[48]){ int cnt; for(cnt = 0; cnt < 48; cnt++){ tempbts[cnt] = key[PC_2[cnt]]; } return 0; } /*循环左移*/ int DES_ROL(ElemType data[56], int time){ ElemType temp[56]; /*保存将要循环移动到右边的位*/ memcpy(temp,data,time); memcpy(temp+time,data+28,time); /*前28位移动*/ memcpy(data,data+time,28-time); memcpy(data+28-time,temp,time); /*后28位移动*/ memcpy(data+28,data+28+time,28-time); memcpy(data+56-time,temp+time,time); return 0; } /*IP置换*/ int DES_IP_Transform(ElemType data[64]){ int cnt; ElemType temp[64]; for(cnt = 0; cnt < 64; cnt++){ temp[cnt] = data[IP_Table[cnt]]; } memcpy(data,temp,64); return 0; } /*IP逆置换*/ int DES_IP_1_Transform(ElemType data[64]){ int cnt; ElemType temp[64]; for(cnt = 0; cnt < 64; cnt++){ temp[cnt] = data[IP_1_Table[cnt]]; } memcpy(data,temp,64); return 0; } /*扩展置换*/ int DES_E_Transform(ElemType data[48]){ int cnt; ElemType temp[48]; for(cnt = 0; cnt < 48; cnt++){ temp[cnt] = data[E_Table[cnt]]; } memcpy(data,temp,48); return 0; } /*P置换*/ int DES_P_Transform(ElemType data[32]){ int cnt; ElemType temp[32]; for(cnt = 0; cnt < 32; cnt++){ temp[cnt] = data[P_Table[cnt]]; } memcpy(data,temp,32); return 0; } /*异或*/ int DES_XOR(ElemType R[48], ElemType L[48] ,int count){ int cnt; for(cnt = 0; cnt < count; cnt++){ R[cnt] ^= L[cnt]; } return 0; } /*S盒置换*/ int DES_SBOX(ElemType data[48]){ int cnt; int line,row,output; int cur1,cur2; for(cnt = 0; cnt < 8; cnt++){ cur1 = cnt*6; cur2 = cnt<<2; /*计算在S盒中的行与列*/ line = (data[cur1]<<1) + data[cur1+5]; row = (data[cur1+1]<<3) + (data[cur1+2]<<2) + (data[cur1+3]<<1) + data[cur1+4]; output = S[cnt][line][row]; /*化为2进制*/ data[cur2] = (output&0X08)>>3; data[cur2+1] = (output&0X04)>>2; data[cur2+2] = (output&0X02)>>1; data[cur2+3] = output&0x01; } return 0; } /*交换*/ int DES_Swap(ElemType left[32], ElemType right[32]){ ElemType temp[32]; memcpy(temp,left,32); memcpy(left,right,32); memcpy(right,temp,32); return 0; } /*加密单个分组*/ int DES_EncryptBlock(ElemType plainBlock[8], ElemType subKeys[16][48], ElemType cipherBlock[8]){ ElemType plainBits[64]; ElemType copyRight[48]; int cnt; Char8ToBit64(plainBlock,plainBits); /*初始置换（IP置换）*/ DES_IP_Transform(plainBits); /*16轮迭代*/ for(cnt = 0; cnt < 16; cnt++){ memcpy(copyRight,plainBits+32,32); /*将右半部分进行扩展置换，从32位扩展到48位*/ DES_E_Transform(copyRight); /*将右半部分与子密钥进行异或操作*/ DES_XOR(copyRight,subKeys[cnt],48); /*异或结果进入S盒，输出32位结果*/ DES_SBOX(copyRight); /*P置换*/ DES_P_Transform(copyRight); /*将明文左半部分与右半部分进行异或*/ DES_XOR(plainBits,copyRight,32); if(cnt != 15){ /*最终完成左右部的交换*/ DES_Swap(plainBits,plainBits+32); } } /*逆初始置换（IP^1置换）*/ DES_IP_1_Transform(plainBits); Bit64ToChar8(plainBits,cipherBlock); return 0; } /*解密单个分组*/ int DES_DecryptBlock(ElemType cipherBlock[8], ElemType subKeys[16][48],ElemType plainBlock[8]){ ElemType cipherBits[64]; ElemType copyRight[48]; int cnt; Char8ToBit64(cipherBlock,cipherBits); /*初始置换（IP置换）*/ DES_IP_Transform(cipherBits); /*16轮迭代*/ for(cnt = 15; cnt >= 0; cnt--){ memcpy(copyRight,cipherBits+32,32); /*将右半部分进行扩展置换，从32位扩展到48位*/ DES_E_Transform(copyRight); /*将右半部分与子密钥进行异或操作*/ DES_XOR(copyRight,subKeys[cnt],48); /*异或结果进入S盒，输出32位结果*/ DES_SBOX(copyRight); /*P置换*/ DES_P_Transform(copyRight); /*将明文左半部分与右半部分进行异或*/ DES_XOR(cipherBits,copyRight,32); if(cnt != 0){ /*最终完成左右部的交换*/ DES_Swap(cipherBits,cipherBits+32); } } /*逆初始置换（IP^1置换）*/ DES_IP_1_Transform(cipherBits); Bit64ToChar8(cipherBits,plainBlock); return 0; } /*加密文件*/ int DES_Encrypt(char *plainFile, char *keyStr,char *cipherFile){ FILE *plain,*cipher; int count; ElemType plainBlock[8],cipherBlock[8],keyBlock[8]; ElemType bKey[64]; ElemType subKeys[16][48]; if((plain = fopen(plainFile,\"rb\")) == NULL){ return PLAIN_FILE_OPEN_ERROR; } if((cipher = fopen(cipherFile,\"wb\")) == NULL){ return CIPHER_FILE_OPEN_ERROR; } /*设置密钥*/ memcpy(keyBlock,keyStr,8); /*将密钥转换为二进制流*/ Char8ToBit64(keyBlock,bKey); /*生成子密钥*/ DES_MakeSubKeys(bKey,subKeys); while(!feof(plain)){ /*每次读8个字节，并返回成功读取的字节数*/ if((count = fread(plainBlock,sizeof(char),8,plain)) == 8){ DES_EncryptBlock(plainBlock,subKeys,cipherBlock); fwrite(cipherBlock,sizeof(char),8,cipher); } } if(count){ /*填充*/ memset(plainBlock + count,'\\0',7 - count); /*最后一个字符保存包括最后一个字符在内的所填充的字符数量*/ plainBlock[7] = 8 - count; DES_EncryptBlock(plainBlock,subKeys,cipherBlock); fwrite(cipherBlock,sizeof(char),8,cipher); } fclose(plain); fclose(cipher); return OK; } /*解密文件*/ int DES_Decrypt(char *cipherFile, char *keyStr,char *plainFile){ FILE *plain, *cipher; int count,times = 0; long fileLen; ElemType plainBlock[8],cipherBlock[8],keyBlock[8]; ElemType bKey[64]; ElemType subKeys[16][48]; if((cipher = fopen(cipherFile,\"rb\")) == NULL){ return CIPHER_FILE_OPEN_ERROR; } if((plain = fopen(plainFile,\"wb\")) == NULL){ return PLAIN_FILE_OPEN_ERROR; } /*设置密钥*/ memcpy(keyBlock,keyStr,8); /*将密钥转换为二进制流*/ Char8ToBit64(keyBlock,bKey); /*生成子密钥*/ DES_MakeSubKeys(bKey,subKeys); /*取文件长度 */ fseek(cipher,0,SEEK_END);/*将文件指针置尾*/ fileLen = ftell(cipher); /*取文件指针当前位置*/ rewind(cipher); /*将文件指针重指向文件头*/ while(1){ /*密文的字节数一定是8的整数倍*/ fread(cipherBlock,sizeof(char),8,cipher); DES_DecryptBlock(cipherBlock,subKeys,plainBlock); times += 8; if(times < fileLen){ fwrite(plainBlock,sizeof(char),8,plain); } else{ break; } } /*判断末尾是否被填充*/ if(plainBlock[7] < 8){ for(count = 8 - plainBlock[7]; count < 7; count++){ if(plainBlock[count] != '\\0'){ break; } } } if(count == 7){/*有填充*/ fwrite(plainBlock,sizeof(char),8 - plainBlock[7],plain); } else{/*无填充*/ fwrite(plainBlock,sizeof(char),8,plain); } fclose(plain); fclose(cipher); return OK; } int main() { clock_t a,b; a = clock(); DES_Encrypt(\"1.txt\ b = clock(); printf(\"加密消耗%d毫秒\\n\ system(\"pause\"); a = clock(); DES_Decrypt(\"2.txt\ b = clock(); printf(\"解密消耗%d毫秒\\n\ getchar(); return 0; } AES aes.h a#ifndef __AES_H__ #define __AES_H__ #define AES_MIN_KEY_SIZE 16 #define AES_MAX_KEY_SIZE 32 #define AES_BLOCK_SIZE 16 typedef unsigned char u8; typedef signed char s8; typedef signed short s16; typedef unsigned short u16; typedef signed int s32; typedef unsigned int u32; typedef signed long long s64; typedef unsigned long long u64; typedef u16 __le16; typedef u32 __le32; #define E_KEY (&ctx->buf[0]) #define D_KEY (&ctx->buf[60]) #define le32_to_cpu #define cpu_to_le32 struct aes_ctx { int key_length; u32 buf[120]; }; void gen_tabs (void); int aes_set_key(struct aes_ctx * ctx, const u8 *in_key, unsigned int key_len); void aes_encrypt(struct aes_ctx * ctx, u8 *out, const u8 *in); void aes_decrypt(struct aes_ctx * ctx, u8 *out, const u8 *in); #endif aes.c #include #include \"aes.h\" static u8 pow_tab[256]; static u8 log_tab[256]; static u8 sbx_tab[256]; static u8 isb_tab[256]; static u32 rco_tab[10]; static u32 ft_tab[4][256]; static u32 it_tab[4][256]; static u32 fl_tab[4][256]; static u32 il_tab[4][256]; static inline u8 byte(const u32 x ,const unsigned n) { return x >> (n << 3); } static inline u32 rol32(u32 word, unsigned int shift) { return (word << shift) | (word >> (32 - shift)); } static inline u32 ror32(u32 word, unsigned int shift) { return (word >> shift) | (word << (32 - shift)); } static inline u8 f_mult(u8 a , u8 b ) { u8 aa = log_tab[a]; u8 cc = aa + log_tab[b]; return pow_tab[cc + (cc < aa ? 1 : 0 )]; } #define ff_mult(a,b) (a && b ? f_mult(a,b) : 0 ) #define f_rn(bo, bi, n, k) bo[n] = ft_tab[0][byte(bi[n],0)] ^ ft_tab[1][byte(bi[(n + 1) & 3],1)] ^ ft_tab[2][byte(bi[(n + 2) & 3],2)] ^ ft_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n) #define i_rn(bo, bi, n, k) bo[n] = it_tab[0][byte(bi[n],0)] ^ it_tab[1][byte(bi[(n + 3) & 3],1)] ^ it_tab[2][byte(bi[(n + 2) & 3],2)] ^ it_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n) #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)] ) #define f_rl(bo, bi, n, k) bo[n] = fl_tab[0][byte(bi[n],0)] ^ fl_tab[1][byte(bi[(n + 1) & 3],1)] ^ fl_tab[2][byte(bi[(n + 2) & 3],2)] ^ fl_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n) #define i_rl(bo, bi, n, k) bo[n] = il_tab[0][byte(bi[n],0)] ^ il_tab[1][byte(bi[(n + 3) & 3],1)] ^ il_tab[2][byte(bi[(n + 2) & 3],2)] ^ il_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n) void gen_tabs (void) { u32 i, t; u8 p, q; /* log and power tables for GF(2**8) finite field with * 0x011b as modular polynomial - the simplest primitive * root is 0x03, used here to generate the tables */ for (i = 0, p = 1; i < 256; ++i) { pow_tab[i] = (u8) p; log_tab[p] = (u8) i; p ^= (p << 1) ^ (p & 0x80 ? 0x01b : 0); } log_tab[1] = 0; for (i = 0, p = 1; i < 10; ++i) { rco_tab[i] = p; p = (p << 1) ^ (p & 0x80 ? 0x01b : 0); } for (i = 0; i < 256; ++i) { p = (i ? pow_tab[255 - log_tab[i]] : 0); q = ((p >> 7) | (p << 1)) ^ ((p >> 6) | (p << 2)); p ^= 0x63 ^ q ^ ((q >> 6) | (q << 2)); sbx_tab[i] = p; isb_tab[p] = (u8) i; } for (i = 0; i < 256; ++i) { p = sbx_tab[i]; t = p; fl_tab[0][i] = t; fl_tab[1][i] = rol32(t, 8); fl_tab[2][i] = rol32(t, 16); fl_tab[3][i] = rol32(t, 24); t = ((u32) ff_mult (2, p)) | ((u32) p << 8) | ((u32) p << 16) | ((u32) ff_mult (3, p) << 24); ft_tab[0][i] = t; ft_tab[1][i] = rol32(t, 8); ft_tab[2][i] = rol32(t, 16); ft_tab[3][i] = rol32(t, 24); p = isb_tab[i]; t = p; il_tab[0][i] = t; il_tab[1][i] = rol32(t, 8); il_tab[2][i] = rol32(t, 16); il_tab[3][i] = rol32(t, 24); t = ((u32) ff_mult (14, p)) | ((u32) ff_mult (9, p) << 8) | ((u32) ff_mult (13, p) << 16) | ((u32) ff_mult (11, p) << 24); it_tab[0][i] = t; it_tab[1][i] = rol32(t, 8); it_tab[2][i] = rol32(t, 16); it_tab[3][i] = rol32(t, 24); } } #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) ^= ror32(u ^ t, 8) ^ ror32(v ^ t, 16) ^ ror32(t,24) /* initialise the key schedule from the user supplied key */ #define loop4(i) { t = ror32(t, 8); t = ls_box(t) ^ 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; } #define loop6(i) { t = ror32(t, 8); t = ls_box(t) ^ 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; } #define loop8(i) { t = ror32(t, 8); ; t = ls_box(t) ^ 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; } int aes_set_key(struct aes_ctx * ctx, const u8 *in_key, unsigned int key_len) { const __le32 *key = (const __le32 *)in_key; u32 i, t, u, v, w; if (key_len % 8 || key_len < AES_MIN_KEY_SIZE || key_len > AES_MAX_KEY_SIZE) { return -1; } ctx->key_length = key_len; E_KEY[0] = le32_to_cpu(key[0]); E_KEY[1] = le32_to_cpu(key[1]); E_KEY[2] = le32_to_cpu(key[2]); E_KEY[3] = le32_to_cpu(key[3]); switch (key_len) { case 16: t = E_KEY[3]; for (i = 0; i < 10; ++i) loop4 (i); break; case 24: E_KEY[4] = le32_to_cpu(key[4]); t = E_KEY[5] = le32_to_cpu(key[5]); for (i = 0; i < 8; ++i) loop6 (i); break; case 32: E_KEY[4] = le32_to_cpu(key[4]); E_KEY[5] = le32_to_cpu(key[5]); E_KEY[6] = le32_to_cpu(key[6]); t = E_KEY[7] = le32_to_cpu(key[7]); for (i = 0; i < 7; ++i) loop8 (i); break; } D_KEY[0] = E_KEY[0]; D_KEY[1] = E_KEY[1]; D_KEY[2] = E_KEY[2]; D_KEY[3] = E_KEY[3]; for (i = 4; i < key_len + 24; ++i) { imix_col (D_KEY[i], E_KEY[i]); } return 0; } /* encrypt a block of text */ #define f_nround(bo, bi, k) f_rn(bo, bi, 0, k); f_rn(bo, bi, 1, k); f_rn(bo, bi, 2, k); f_rn(bo, bi, 3, k); k += 4 #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) void aes_encrypt(struct aes_ctx * ctx, u8 *out, const u8 *in) { const __le32 *src = (const __le32 *)in; __le32 *dst = (__le32 *)out; u32 b0[4], b1[4]; const u32 *kp = E_KEY + 4; b0[0] = le32_to_cpu(src[0]) ^ E_KEY[0]; b0[1] = le32_to_cpu(src[1]) ^ E_KEY[1]; b0[2] = le32_to_cpu(src[2]) ^ E_KEY[2]; b0[3] = le32_to_cpu(src[3]) ^ E_KEY[3]; if (ctx->key_length > 24) { f_nround (b1, b0, kp); f_nround (b0, b1, kp); } if (ctx->key_length > 16) { 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_nround (b0, b1, kp); f_nround (b1, b0, kp); f_lround (b0, b1, kp); dst[0] = cpu_to_le32(b0[0]); dst[1] = cpu_to_le32(b0[1]); dst[2] = cpu_to_le32(b0[2]); dst[3] = cpu_to_le32(b0[3]); } /* decrypt a block of text */ #define i_nround(bo, bi, k) i_rn(bo, bi, 0, k); i_rn(bo, bi, 1, k); i_rn(bo, bi, 2, k); i_rn(bo, bi, 3, k); k -= 4 #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) void aes_decrypt(struct aes_ctx * ctx, u8 *out, const u8 *in) { const __le32 *src = (const __le32 *)in; __le32 *dst = (__le32 *)out; u32 b0[4], b1[4]; const int key_len = ctx->key_length; const u32 *kp = D_KEY + key_len + 20; b0[0] = le32_to_cpu(src[0]) ^ E_KEY[key_len + 24]; b0[1] = le32_to_cpu(src[1]) ^ E_KEY[key_len + 25]; b0[2] = le32_to_cpu(src[2]) ^ E_KEY[key_len + 26]; b0[3] = le32_to_cpu(src[3]) ^ E_KEY[key_len + 27]; if (key_len > 24) { i_nround (b1, b0, kp); i_nround (b0, b1, kp); } if (key_len > 16) { 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_nround (b0, b1, kp); i_nround (b1, b0, kp); i_lround (b0, b1, kp); dst[0] = cpu_to_le32(b0[0]); dst[1] = cpu_to_le32(b0[1]); dst[2] = cpu_to_le32(b0[2]); dst[3] = cpu_to_le32(b0[3]); } testaes.c #include void output(unsigned char * p) { int i = 0 ; for(i = 0 ; p[i] ; i ++) { if(i && i % 16 == 0 ) printf(\" \"); printf(\" 0x%02x \ } printf(\" \"); } int main(int argc, char * argv[]) { char szbuf[1024], sztmp[1024];; char *pkey = \"iamvingo and live\"; struct aes_ctx aes; int len ; gen_tabs(); if(aes_set_key(&aes, pkey , 16) != 0) { printf(\"can't set key : %s \ return 0; } printf(\"Please Input string to encrypt : \"); while(gets(szbuf) > 0 ) { len = strlen(szbuf); szbuf[len] = ''; printf(\"Input is : %s \ aes_encrypt(&aes,sztmp,szbuf); printf(\"Encryp Result is : \"); output(sztmp); aes_decrypt(&aes,szbuf,sztmp); printf(\"Descrpy Result is : %s \ printf(\"Please Input string to encrypt : \"); } return 0; } 因篇幅问题不能全部显示，请点此查看更多更全内容