Mercurial > dropbear
view libtomcrypt/tests/common.c @ 1861:2b3a8026a6ce
Add re-exec for server
This allows ASLR to re-randomize the address
space for every connection, preventing some
vulnerabilities from being exploitable by
repeated probing.
Overhead (memory and time) is yet to be confirmed.
At present this is only enabled on Linux. Other BSD platforms
with fexecve() would probably also work though have not been tested.
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Sun, 30 Jan 2022 10:14:56 +0800 |
parents | 6dba84798cd5 |
children |
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/* 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 "common.h" /** @file common.c Steffen Jaeckel */ void run_cmd(int res, int line, const char *file, const char *cmd, const char *algorithm) { if (res != CRYPT_OK) { fprintf(stderr, "%s (%d)%s%s\n%s:%d:%s\n", error_to_string(res), res, (algorithm ? " - " : ""), (algorithm ? algorithm : ""), file, line, cmd); if (res != CRYPT_NOP) { exit(EXIT_FAILURE); } } } void print_hex(const char* what, const void* v, const unsigned long l) { const unsigned char* p = v; unsigned long x, y = 0, z; fprintf(stderr, "%s contents: \n", what); for (x = 0; x < l; ) { fprintf(stderr, "%02X ", p[x]); if (!(++x % 16) || x == l) { if((x % 16) != 0) { z = 16 - (x % 16); if(z >= 8) fprintf(stderr, " "); for (; z != 0; --z) { fprintf(stderr, " "); } } fprintf(stderr, " | "); for(; y < x; y++) { if((y % 8) == 0) fprintf(stderr, " "); if(isgraph(p[y])) fprintf(stderr, "%c", p[y]); else fprintf(stderr, "."); } fprintf(stderr, "\n"); } else if((x % 8) == 0) { fprintf(stderr, " "); } } } prng_state yarrow_prng; /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */