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

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 */

#include "tomcrypt.h"

#ifdef LTC_SOBER128

int sober128_stream_test(void)
{
#ifndef LTC_TEST
   return CRYPT_NOP;
#else
   unsigned char key[16] = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6b, 0x65, 0x79,
                             0x20, 0x31, 0x32, 0x38, 0x62, 0x69, 0x74, 0x73 };
   unsigned char iv[4]   = { 0x00, 0x00, 0x00, 0x00 };
   unsigned char out[20] = { 0x43, 0x50, 0x0c, 0xcf, 0x89, 0x91, 0x9f, 0x1d,
                             0xaa, 0x37, 0x74, 0x95, 0xf4, 0xb4, 0x58, 0xc2,
                             0x40, 0x37, 0x8b, 0xbb };
   int err, len = 20;
   unsigned char  src[20], dst[20];
   sober128_state st;

   XMEMSET(src, 0, len); /* input */
   if ((err = sober128_stream_setup(&st, key, sizeof(key))) != CRYPT_OK) return err;
   if ((err = sober128_stream_setiv(&st, iv, sizeof(iv))) != CRYPT_OK)   return err;
   if ((err = sober128_stream_crypt(&st, src, len, dst)) != CRYPT_OK)    return err;
   if ((err = sober128_stream_done(&st)) != CRYPT_OK)                    return err;
   if (compare_testvector(dst, len, out, len, "SOBER-128", 0)) {
      return CRYPT_FAIL_TESTVECTOR;
   }
   return CRYPT_OK;
#endif
}

#endif

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