Mercurial > dropbear
view libtomcrypt/src/modes/f8/f8_test_mode.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 | 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 "tomcrypt.h" /** @file f8_test_mode.c F8 implementation, test, Tom St Denis */ #ifdef LTC_F8_MODE int f8_test_mode(void) { #ifndef LTC_TEST return CRYPT_NOP; #else static const unsigned char key[16] = { 0x23, 0x48, 0x29, 0x00, 0x84, 0x67, 0xbe, 0x18, 0x6c, 0x3d, 0xe1, 0x4a, 0xae, 0x72, 0xd6, 0x2c }; static const unsigned char salt[4] = { 0x32, 0xf2, 0x87, 0x0d }; static const unsigned char IV[16] = { 0x00, 0x6e, 0x5c, 0xba, 0x50, 0x68, 0x1d, 0xe5, 0x5c, 0x62, 0x15, 0x99, 0xd4, 0x62, 0x56, 0x4a }; static const unsigned char pt[39] = { 0x70, 0x73, 0x65, 0x75, 0x64, 0x6f, 0x72, 0x61, 0x6e, 0x64, 0x6f, 0x6d, 0x6e, 0x65, 0x73, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x6e, 0x65, 0x78, 0x74, 0x20, 0x62, 0x65, 0x73, 0x74, 0x20, 0x74, 0x68, 0x69, 0x6e, 0x67 }; static const unsigned char ct[39] = { 0x01, 0x9c, 0xe7, 0xa2, 0x6e, 0x78, 0x54, 0x01, 0x4a, 0x63, 0x66, 0xaa, 0x95, 0xd4, 0xee, 0xfd, 0x1a, 0xd4, 0x17, 0x2a, 0x14, 0xf9, 0xfa, 0xf4, 0x55, 0xb7, 0xf1, 0xd4, 0xb6, 0x2b, 0xd0, 0x8f, 0x56, 0x2c, 0x0e, 0xef, 0x7c, 0x48, 0x02 }; unsigned char buf[39]; symmetric_F8 f8; int err, idx; idx = find_cipher("aes"); if (idx == -1) { idx = find_cipher("rijndael"); if (idx == -1) return CRYPT_NOP; } /* initialize the context */ if ((err = f8_start(idx, IV, key, sizeof(key), salt, sizeof(salt), 0, &f8)) != CRYPT_OK) { return err; } /* encrypt block */ if ((err = f8_encrypt(pt, buf, sizeof(pt), &f8)) != CRYPT_OK) { f8_done(&f8); return err; } f8_done(&f8); /* compare */ if (compare_testvector(buf, sizeof(ct), ct, sizeof(ct), "f8", 0)) { return CRYPT_FAIL_TESTVECTOR; } return CRYPT_OK; #endif } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */