Mercurial > dropbear
view libtomcrypt/testprof/katja_test.c @ 1930:299f4f19ba19
Add /usr/sbin and /sbin to default root PATH
When dropbear is used in a very restricted environment (such as in a
initrd), the default user shell is often also very restricted
and doesn't take care of setting the PATH so the user ends up
with the PATH set by dropbear. Unfortunately, dropbear always
sets "/usr/bin:/bin" as default PATH even for the root user
which should have /usr/sbin and /sbin too.
For a concrete instance of this problem, see the "Remote Unlocking"
section in this tutorial: https://paxswill.com/blog/2013/11/04/encrypted-raspberry-pi/
It speaks of a bug in the initramfs script because it's written "blkid"
instead of "/sbin/blkid"... this is just because the scripts from the
initramfs do not expect to have a PATH without the sbin directories and
because dropbear is not setting the PATH appropriately for the root user.
I'm thus suggesting to use the attached patch to fix this misbehaviour (I
did not test it, but it's easy enough). It might seem anecdotic but
multiple Kali users have been bitten by this.
From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903403
author | Raphael Hertzog <hertzog@debian.org> |
---|---|
date | Mon, 09 Jul 2018 16:27:53 +0200 |
parents | f849a5ca2efc |
children |
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#include <tomcrypt_test.h> #ifdef MKAT int katja_test(void) { unsigned char in[1024], out[1024], tmp[1024]; katja_key key, privKey, pubKey; int hash_idx, prng_idx, stat, stat2, size; unsigned long kat_msgsize, len, len2, cnt; static unsigned char lparam[] = { 0x01, 0x02, 0x03, 0x04 }; hash_idx = find_hash("sha1"); prng_idx = find_prng("yarrow"); if (hash_idx == -1 || prng_idx == -1) { fprintf(stderr, "katja_test requires LTC_SHA1 and yarrow"); return 1; } for (size = 1024; size <= 2048; size += 256) { /* make 10 random key */ for (cnt = 0; cnt < 10; cnt++) { DO(katja_make_key(&yarrow_prng, prng_idx, size/8, &key)); if (mp_count_bits(key.N) < size - 7) { fprintf(stderr, "katja_%d key modulus has %d bits\n", size, mp_count_bits(key.N)); len = mp_unsigned_bin_size(key.N); mp_to_unsigned_bin(key.N, tmp); fprintf(stderr, "N == \n"); for (cnt = 0; cnt < len; ) { fprintf(stderr, "%02x ", tmp[cnt]); if (!(++cnt & 15)) fprintf(stderr, "\n"); } len = mp_unsigned_bin_size(key.p); mp_to_unsigned_bin(key.p, tmp); fprintf(stderr, "p == \n"); for (cnt = 0; cnt < len; ) { fprintf(stderr, "%02x ", tmp[cnt]); if (!(++cnt & 15)) fprintf(stderr, "\n"); } len = mp_unsigned_bin_size(key.q); mp_to_unsigned_bin(key.q, tmp); fprintf(stderr, "\nq == \n"); for (cnt = 0; cnt < len; ) { fprintf(stderr, "%02x ", tmp[cnt]); if (!(++cnt & 15)) fprintf(stderr, "\n"); } fprintf(stderr, "\n"); return 1; } if (cnt != 9) { katja_free(&key); } } /* encrypt the key (without lparam) */ for (cnt = 0; cnt < 4; cnt++) { for (kat_msgsize = 1; kat_msgsize <= 42; kat_msgsize++) { /* make a random key/msg */ yarrow_read(in, kat_msgsize, &yarrow_prng); len = sizeof(out); len2 = kat_msgsize; DO(katja_encrypt_key(in, kat_msgsize, out, &len, NULL, 0, &yarrow_prng, prng_idx, hash_idx, &key)); /* change a byte */ out[8] ^= 1; DO(katja_decrypt_key(out, len, tmp, &len2, NULL, 0, hash_idx, &stat2, &key)); /* change a byte back */ out[8] ^= 1; if (len2 != kat_msgsize) { fprintf(stderr, "\nkatja_decrypt_key mismatch len %lu (first decrypt)", len2); return 1; } len2 = kat_msgsize; DO(katja_decrypt_key(out, len, tmp, &len2, NULL, 0, hash_idx, &stat, &key)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_decrypt_key failed"); return 1; } if (len2 != kat_msgsize || memcmp(tmp, in, kat_msgsize)) { unsigned long x; fprintf(stderr, "\nkatja_decrypt_key mismatch, len %lu (second decrypt)\n", len2); fprintf(stderr, "Original contents: \n"); for (x = 0; x < kat_msgsize; ) { fprintf(stderr, "%02x ", in[x]); if (!(++x % 16)) { fprintf(stderr, "\n"); } } fprintf(stderr, "\n"); fprintf(stderr, "Output contents: \n"); for (x = 0; x < kat_msgsize; ) { fprintf(stderr, "%02x ", out[x]); if (!(++x % 16)) { fprintf(stderr, "\n"); } } fprintf(stderr, "\n"); return 1; } } } /* encrypt the key (with lparam) */ for (kat_msgsize = 1; kat_msgsize <= 42; kat_msgsize++) { len = sizeof(out); len2 = kat_msgsize; DO(katja_encrypt_key(in, kat_msgsize, out, &len, lparam, sizeof(lparam), &yarrow_prng, prng_idx, hash_idx, &key)); /* change a byte */ out[8] ^= 1; DO(katja_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), hash_idx, &stat2, &key)); if (len2 != kat_msgsize) { fprintf(stderr, "\nkatja_decrypt_key mismatch len %lu (first decrypt)", len2); return 1; } /* change a byte back */ out[8] ^= 1; len2 = kat_msgsize; DO(katja_decrypt_key(out, len, tmp, &len2, lparam, sizeof(lparam), hash_idx, &stat, &key)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_decrypt_key failed"); return 1; } if (len2 != kat_msgsize || memcmp(tmp, in, kat_msgsize)) { fprintf(stderr, "katja_decrypt_key mismatch len %lu", len2); return 1; } } #if 0 /* sign a message (unsalted, lower cholestorol and Atkins approved) now */ len = sizeof(out); DO(katja_sign_hash(in, 20, out, &len, &yarrow_prng, prng_idx, hash_idx, 0, &key)); /* export key and import as both private and public */ len2 = sizeof(tmp); DO(katja_export(tmp, &len2, PK_PRIVATE, &key)); DO(katja_import(tmp, len2, &privKey)); len2 = sizeof(tmp); DO(katja_export(tmp, &len2, PK_PUBLIC, &key)); DO(katja_import(tmp, len2, &pubKey)); /* verify with original */ DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &key)); /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &key)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_verify_hash (unsalted, origKey) failed, %d, %d", stat, stat2); katja_free(&key); katja_free(&pubKey); katja_free(&privKey); return 1; } /* verify with privKey */ /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &privKey)); /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &privKey)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_verify_hash (unsalted, privKey) failed, %d, %d", stat, stat2); katja_free(&key); katja_free(&pubKey); katja_free(&privKey); return 1; } /* verify with pubKey */ /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat, &pubKey)); /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 0, &stat2, &pubKey)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_verify_hash (unsalted, pubkey) failed, %d, %d", stat, stat2); katja_free(&key); katja_free(&pubKey); katja_free(&privKey); return 1; } /* sign a message (salted) now (use privKey to make, pubKey to verify) */ len = sizeof(out); DO(katja_sign_hash(in, 20, out, &len, &yarrow_prng, prng_idx, hash_idx, 8, &privKey)); DO(katja_verify_hash(out, len, in, 20, hash_idx, 8, &stat, &pubKey)); /* change a byte */ in[0] ^= 1; DO(katja_verify_hash(out, len, in, 20, hash_idx, 8, &stat2, &pubKey)); if (!(stat == 1 && stat2 == 0)) { fprintf(stderr, "katja_verify_hash (salted) failed, %d, %d", stat, stat2); katja_free(&key); katja_free(&pubKey); katja_free(&privKey); return 1; } #endif katja_free(&key); katja_free(&pubKey); katja_free(&privKey); } /* free the key and return */ return 0; } #else int katja_test(void) { fprintf(stderr, "NOP"); return 0; } #endif