Mercurial > dropbear
view libtomcrypt/testprof/dsa_test.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 | f849a5ca2efc |
children |
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#include <tomcrypt_test.h> #ifdef LTC_MDSA int dsa_test(void) { unsigned char msg[16], out[1024], out2[1024]; unsigned long x, y; int stat1, stat2; dsa_key key, key2; /* make a random key */ DO(dsa_make_key(&yarrow_prng, find_prng("yarrow"), 20, 128, &key)); /* verify it */ DO(dsa_verify_key(&key, &stat1)); if (stat1 == 0) { fprintf(stderr, "dsa_verify_key "); return 1; } /* encrypt a message */ for (x = 0; x < 16; x++) { msg[x] = x; } x = sizeof(out); DO(dsa_encrypt_key(msg, 16, out, &x, &yarrow_prng, find_prng("yarrow"), find_hash("sha1"), &key)); /* decrypt */ y = sizeof(out2); DO(dsa_decrypt_key(out, x, out2, &y, &key)); if (y != 16 || memcmp(out2, msg, 16)) { fprintf(stderr, "dsa_decrypt failed, y == %lu\n", y); return 1; } /* sign the message */ x = sizeof(out); DO(dsa_sign_hash(msg, sizeof(msg), out, &x, &yarrow_prng, find_prng("yarrow"), &key)); /* verify it once */ DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key)); /* Modify and verify again */ msg[0] ^= 1; DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat2, &key)); msg[0] ^= 1; if (!(stat1 == 1 && stat2 == 0)) { fprintf(stderr, "dsa_verify %d %d", stat1, stat2); return 1; } /* test exporting it */ x = sizeof(out2); DO(dsa_export(out2, &x, PK_PRIVATE, &key)); DO(dsa_import(out2, x, &key2)); /* verify a signature with it */ DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key2)); if (stat1 == 0) { fprintf(stderr, "dsa_verify (import private) %d ", stat1); return 1; } dsa_free(&key2); /* export as public now */ x = sizeof(out2); DO(dsa_export(out2, &x, PK_PUBLIC, &key)); DO(dsa_import(out2, x, &key2)); /* verify a signature with it */ DO(dsa_verify_hash(out, x, msg, sizeof(msg), &stat1, &key2)); if (stat1 == 0) { fprintf(stderr, "dsa_verify (import public) %d ", stat1); return 1; } dsa_free(&key2); dsa_free(&key); return 0; } #else int dsa_test(void) { fprintf(stderr, "NOP"); return 0; } #endif /* $Source$ */ /* $Revision$ */ /* $Date$ */