blob: 32de878b4104e8583d8b1817fbcffba293261128 [file] [log] [blame]
 /* emits an optimized version of SAFER+ ... only does encrypt so far... */ #include #include /* This is the "Armenian" Shuffle. It takes the input from b and stores it in b2 */ #define SHUF\ b2[0] = b[8]; b2[1] = b[11]; b2[2] = b[12]; b2[3] = b[15]; \ b2[4] = b[2]; b2[5] = b[1]; b2[6] = b[6]; b2[7] = b[5]; \ b2[8] = b[10]; b2[9] = b[9]; b2[10] = b[14]; b2[11] = b[13]; \ b2[12] = b[0]; b2[13] = b[7]; b2[14] = b[4]; b2[15] = b[3]; memcpy(b, b2, sizeof(b)); /* This is the inverse shuffle. It takes from b and gives to b2 */ #define iSHUF(b, b2) \ b2[0] = b[12]; b2[1] = b[5]; b2[2] = b[4]; b2[3] = b[15]; \ b2[4] = b[14]; b2[5] = b[7]; b2[6] = b[6]; b2[7] = b[13]; \ b2[8] = b[0]; b2[9] = b[9]; b2[10] = b[8]; b2[11] = b[1]; \ b2[12] = b[2]; b2[13] = b[11]; b2[14] = b[10]; b2[15] = b[3]; memcpy(b, b2, sizeof(b)); #define ROUND(b, i) \ b[0] = (safer_ebox[(b[0] ^ skey->saferp.K[i][0]) & 255] + skey->saferp.K[i+1][0]) & 255; \ b[1] = safer_lbox[(b[1] + skey->saferp.K[i][1]) & 255] ^ skey->saferp.K[i+1][1]; \ b[2] = safer_lbox[(b[2] + skey->saferp.K[i][2]) & 255] ^ skey->saferp.K[i+1][2]; \ b[3] = (safer_ebox[(b[3] ^ skey->saferp.K[i][3]) & 255] + skey->saferp.K[i+1][3]) & 255; \ b[4] = (safer_ebox[(b[4] ^ skey->saferp.K[i][4]) & 255] + skey->saferp.K[i+1][4]) & 255; \ b[5] = safer_lbox[(b[5] + skey->saferp.K[i][5]) & 255] ^ skey->saferp.K[i+1][5]; \ b[6] = safer_lbox[(b[6] + skey->saferp.K[i][6]) & 255] ^ skey->saferp.K[i+1][6]; \ b[7] = (safer_ebox[(b[7] ^ skey->saferp.K[i][7]) & 255] + skey->saferp.K[i+1][7]) & 255; \ b[8] = (safer_ebox[(b[8] ^ skey->saferp.K[i][8]) & 255] + skey->saferp.K[i+1][8]) & 255; \ b[9] = safer_lbox[(b[9] + skey->saferp.K[i][9]) & 255] ^ skey->saferp.K[i+1][9]; \ b[10] = safer_lbox[(b[10] + skey->saferp.K[i][10]) & 255] ^ skey->saferp.K[i+1][10]; \ b[11] = (safer_ebox[(b[11] ^ skey->saferp.K[i][11]) & 255] + skey->saferp.K[i+1][11]) & 255; \ b[12] = (safer_ebox[(b[12] ^ skey->saferp.K[i][12]) & 255] + skey->saferp.K[i+1][12]) & 255; \ b[13] = safer_lbox[(b[13] + skey->saferp.K[i][13]) & 255] ^ skey->saferp.K[i+1][13]; \ b[14] = safer_lbox[(b[14] + skey->saferp.K[i][14]) & 255] ^ skey->saferp.K[i+1][14]; \ b[15] = (safer_ebox[(b[15] ^ skey->saferp.K[i][15]) & 255] + skey->saferp.K[i+1][15]) & 255; int main(void) { int b[16], b2[16], x, y, z; /* -- ENCRYPT --- */ for (x = 0; x < 16; x++) b[x] = x; /* emit encrypt preabmle */ printf( "void saferp_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)\n" "{\n" " int x;\n" " unsigned char b[16];\n" "\n" " LTC_ARGCHK(pt != NULL);\n" " LTC_ARGCHK(ct != NULL);\n" " LTC_ARGCHK(skey != NULL);\n" "\n" " /* do eight rounds */\n" " for (x = 0; x < 16; x++) {\n" " b[x] = pt[x];\n" " }\n"); /* do 8 rounds of ROUND; LT; */ for (x = 0; x < 8; x++) { /* ROUND(..., x*2) */ for (y = 0; y < 16; y++) { printf("b[%d] = (safer_%cbox[(b[%d] %c skey->saferp.K[%d][%d]) & 255] %c skey->saferp.K[%d][%d]) & 255;\n", b[y], "elle"[y&3], b[y], "^++^"[y&3], x*2, y, "+^^+"[y&3], x*2+1, y); } /* LT */ for (y = 0; y < 4; y++) { printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[0], b[0], b[1], b[0], b[1]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[2], b[2], b[3], b[3], b[2]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[4], b[4], b[5], b[5], b[4]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[6], b[6], b[7], b[7], b[6]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[8], b[8], b[9], b[9], b[8]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[10], b[10], b[11], b[11], b[10]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[12], b[12], b[13], b[13], b[12]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[14], b[14], b[15], b[15], b[14]); if (y < 3) { SHUF; } } } printf( " if (skey->saferp.rounds <= 8) {\n"); /* finish */ for (x = 0; x < 16; x++) { printf( " ct[%d] = (b[%d] %c skey->saferp.K[skey->saferp.rounds*2][%d]) & 255;\n", x, b[x], "^++^"[x&3], x); } printf(" return;\n }\n"); /* 192-bit keys */ printf( " /* 192-bit key? */\n" " if (skey->saferp.rounds > 8) {\n"); /* do 4 rounds of ROUND; LT; */ for (x = 8; x < 12; x++) { /* ROUND(..., x*2) */ for (y = 0; y < 16; y++) { printf("b[%d] = (safer_%cbox[(b[%d] %c skey->saferp.K[%d][%d]) & 255] %c skey->saferp.K[%d][%d]) & 255;\n", b[y], "elle"[y&3], b[y], "^++^"[y&3], x*2, y, "+^^+"[y&3], x*2+1, y); } /* LT */ for (y = 0; y < 4; y++) { printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[0], b[0], b[1], b[0], b[1]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[2], b[2], b[3], b[3], b[2]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[4], b[4], b[5], b[5], b[4]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[6], b[6], b[7], b[7], b[6]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[8], b[8], b[9], b[9], b[8]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[10], b[10], b[11], b[11], b[10]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[12], b[12], b[13], b[13], b[12]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[14], b[14], b[15], b[15], b[14]); if (y < 3) { SHUF; } } } printf("}\n"); printf( " if (skey->saferp.rounds <= 12) {\n"); /* finish */ for (x = 0; x < 16; x++) { printf( " ct[%d] = (b[%d] %c skey->saferp.K[skey->saferp.rounds*2][%d]) & 255;\n", x, b[x], "^++^"[x&3], x); } printf(" return;\n }\n"); /* 256-bit keys */ printf( " /* 256-bit key? */\n" " if (skey->saferp.rounds > 12) {\n"); /* do 4 rounds of ROUND; LT; */ for (x = 12; x < 16; x++) { /* ROUND(..., x*2) */ for (y = 0; y < 16; y++) { printf("b[%d] = (safer_%cbox[(b[%d] %c skey->saferp.K[%d][%d]) & 255] %c skey->saferp.K[%d][%d]) & 255;\n", b[y], "elle"[y&3], b[y], "^++^"[y&3], x*2, y, "+^^+"[y&3], x*2+1, y); } /* LT */ for (y = 0; y < 4; y++) { printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[0], b[0], b[1], b[0], b[1]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[2], b[2], b[3], b[3], b[2]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[4], b[4], b[5], b[5], b[4]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[6], b[6], b[7], b[7], b[6]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[8], b[8], b[9], b[9], b[8]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[10], b[10], b[11], b[11], b[10]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[12], b[12], b[13], b[13], b[12]); printf(" b[%d] = (b[%d] + (b[%d] = (b[%d] + b[%d]) & 255)) & 255;\n", b[14], b[14], b[15], b[15], b[14]); if (y < 3) { SHUF; } } } /* finish */ for (x = 0; x < 16; x++) { printf( " ct[%d] = (b[%d] %c skey->saferp.K[skey->saferp.rounds*2][%d]) & 255;\n", x, b[x], "^++^"[x&3], x); } printf(" return;\n"); printf(" }\n}\n\n"); return 0; } /* \$Source: /cvs/libtom/libtomcrypt/notes/etc/saferp_optimizer.c,v \$ */ /* \$Revision: 1.2 \$ */ /* \$Date: 2005/05/05 14:35:58 \$ */