Mercurial > dropbear
view libtomcrypt/notes/etc/whirlgen.c @ 1631:292f79307600
fix some gcc warnings (#73)
* tweak string size
fix gcc8 warnings
```
svr-agentfwd.c: In function 'bindagent':
svr-agentfwd.c:254:53: warning: '%s' directive output may be truncated writing up to 107 bytes into a region of size between 0 and 107 [-Wformat-truncation=]
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile);
^~ ~~~~~~~~
svr-agentfwd.c:254:2: note: 'snprintf' output between 2 and 216 bytes into a destination of size 108
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", path, sockfile);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
* cleanup signed/unsigned comparison
fix gcc8 warnings
```
scp.c: In function 'do_local_cmd':
scp.c:132:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
for (i = 0; i < a->num; i++)
^
scpmisc.c: In function 'addargs':
scpmisc.c:161:25: warning: comparison of integer expressions of different signedness: 'int' and 'u_int' {aka 'unsigned int'} [-Wsign-compare]
} else if (args->num+2 >= nalloc)
^~
scpmisc.c: In function 'replacearg':
scpmisc.c:183:12: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
if (which >= args->num)
^~
scpmisc.c: In function 'freeargs':
scpmisc.c:196:17: warning: comparison of integer expressions of different signedness: 'u_int' {aka 'unsigned int'} and 'int' [-Wsign-compare]
for (i = 0; i < args->num; i++)
^
```
see https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/misc.h.diff?r1=1.16&r2=1.17
author | François Perrad <francois.perrad@gadz.org> |
---|---|
date | Wed, 20 Mar 2019 15:25:15 +0100 |
parents | 6dba84798cd5 |
children |
line wrap: on
line source
#include <stdio.h> unsigned E[16] = { 1, 0xb, 9, 0xc, 0xd, 6, 0xf, 3, 0xe, 8, 7, 4, 0xa, 2, 5, 0 }; unsigned Ei[16]; unsigned R[16] = { 7, 0xc, 0xb, 0xd, 0xe, 4, 9, 0xf, 6, 3, 8, 0xa, 2, 5, 1, 0 }; unsigned cir[8][8] = { {1, 1, 4, 1, 8, 5, 2, 9 }, }; unsigned gf_mul(unsigned a, unsigned b) { unsigned r; r = 0; while (a) { if (a & 1) r ^= b; a >>= 1; b = (b << 1) ^ (b & 0x80 ? 0x11d : 0x00); } return r; } unsigned sbox(unsigned x) { unsigned a, b, w; a = x >> 4; b = x & 15; a = E[a]; b = Ei[b]; w = a ^ b; w = R[w]; a = E[a ^ w]; b = Ei[b ^ w]; return (a << 4) | b; } int main(void) { unsigned x, y; for (x = 0; x < 16; x++) Ei[E[x]] = x; // for (x = 0; x < 16; x++) printf("%2x ", sbox(x)); for (y = 1; y < 8; y++) { for (x = 0; x < 8; x++) { cir[y][x] = cir[y-1][(x-1)&7]; } } /* printf("\n"); for (y = 0; y < 8; y++) { for (x = 0; x < 8; x++) printf("%2d ", cir[y][x]); printf("\n"); } */ for (y = 0; y < 8; y++) { printf("static const ulong64 sbox%d[] = {\n", y); for (x = 0; x < 256; ) { printf("CONST64(0x%02x%02x%02x%02x%02x%02x%02x%02x)", gf_mul(sbox(x), cir[y][0]), gf_mul(sbox(x), cir[y][1]), gf_mul(sbox(x), cir[y][2]), gf_mul(sbox(x), cir[y][3]), gf_mul(sbox(x), cir[y][4]), gf_mul(sbox(x), cir[y][5]), gf_mul(sbox(x), cir[y][6]), gf_mul(sbox(x), cir[y][7])); if (x < 255) printf(", "); if (!(++x & 3)) printf("\n"); } printf("};\n\n"); } printf("static const ulong64 cont[] = {\n"); for (y = 0; y <= 10; y++) { printf("CONST64(0x"); for (x = 0; x < 8; x++) { printf("%02x", sbox((8*y + x)&255)); } printf("),\n"); } printf("};\n\n"); return 0; } /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */