Mercurial > dropbear
view libtomcrypt/notes/etc/saferp_optimizer.c @ 1665:7c17995bcdfb
Improve address logging on early exit messages (#83)
Change 'Early exit' and 'Exit before auth' messages to include the IP
address & port as part of the message.
This allows log scanning utilities such as 'fail2ban' to obtain the
offending IP address as part of the failure event instead of extracting
the PID from the message and then scanning the log again for match
'child connection from' messages
Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author | Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com> |
---|---|
date | Wed, 18 Mar 2020 15:28:56 +0000 |
parents | 6dba84798cd5 |
children |
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/* emits an optimized version of LTC_SAFER+ ... only does encrypt so far... */ #include <stdio.h> #include <string.h> /* 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; } /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */