aes.zip_AES

AES.h??: #ifndef AES_H #define AES_H #include <stdio.h> #include <malloc.h> #include <sys/stat.h> #define OK 1 #define ERROR -1 #define STATUS int #define plainfile "C:/TEMP/cd1.rmvb" #define encryptfile "C:/TEMP/cd2.rmvb" #define decryptfile "C:/TEMP/cd3.rmvb" #define RAM_LEN (1024) #define bytes2word(b0,b1,b2,b3) ((b0<<24)|(b1<<16)|(b2<<8)|(b3)) typedef unsigned char u1byte; typedef unsigned long u4byte; #define LARGE_TABLES u1byte pow_tab[256]; u1byte log_tab[256]; u1byte sbx_tab[256]; u1byte isb_tab[256]; u4byte rco_tab[ 10]; u4byte ft_tab[4][256]; u4byte it_tab[4][256]; #ifdef LARGE_TABLES u4byte fl_tab[4][256]; u4byte il_tab[4][256]; #endif u4byte k_len; u4byte e_key[60]; u4byte d_key[60]; #define ff_mult(a,b) (a && b ? pow_tab[(log_tab[a] + log_tab[b]) % 255] : 0) #define byte(x,n) ((u1byte)((x)>>(8*n))) #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 rotr(x,n) (((x) >> ((int)(n))) | ((x) << (32 -(int)(n)))) #define rotl(x,n) (((x) << ((int)(n))) | ((x) >> (32 -(int)(n)))) #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)] ) #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) #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) #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) #endif #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) #define loop4(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; \ } #define loop6(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; \ } #define loop8(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; \ } #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) #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) long get_file_size(char *filename); void gen_tabs(void); void set_key(const u4byte in_key[], const u4byte key_len); void decrypt(const u4byte in_blk[4], u4byte out_blk[4],u4byte b0[4],u4byte b1[4]); void encrypt(const u4byte in_blk[4], u4byte out_blk[4],u4byte b0[4],u4byte b1[4]); void word2bytes(long word,unsigned char* text); void encryptstart(unsigned char* in, unsigned char* out,int len,u4byte in_blk[4],u4byte out_blk[4],u4byte b0[4],u4byte b1[4]); void decryptstart(unsigned char* in, unsigned char* out,int len,u4byte in_blk[4],u4byte out_blk[4],u4byte b0[4],u4byte b1[4]); void encryptlast(unsigned char* in, unsigned char* out,int len,u4byte in_blk[4],u4byte out_blk[4],u4byte b0[4],u4byte b1[4]); STATUS aesencrypt(char* infile, char* outfile); STATUS aesdecrypt(char* infile, char* outfile); #endif AES.c??: #include "AES.h" u4byte tab_gen = 0; long get_file_size(char *filename) { struct stat f_stat; if(stat(filename,&f_stat)==-1) return -1; return f_stat.st_size; } void gen_tabs(void) { u4byte i, t; u1byte p, q; for(i = 0,p = 1; i < 256; ++i) { pow_tab[i] = (u1byte)p; log_tab[p] = (u1byte)i; p = p ^ (p << 1) ^ (p & 0x80 ? 0x01b : 0); } log_tab[1] = 0; p = 1; for(i = 0; i < 10; ++i) { rco_tab[i] = p; p = (p << 1) ^ (p & 0x80 ? 0x1b : 0); } for(i = 0; i < 256; ++i) { p = (i ? pow_tab[255 - log_tab[i]] : 0); q = p; q = (q >> 7) | (q << 1); p ^= q; q = (q >> 7) | (q << 1); p ^= q; q = (q >> 7) | (q << 1); p ^= q; q = (q >> 7) | (q << 1); p ^= q ^ 0x63; sbx_tab[i] = 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;