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view libtomcrypt/src/pk/dh/dh.c @ 1930:299f4f19ba19

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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
line wrap: on
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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"

#ifdef LTC_MDH

/* This holds the key settings.  ***MUST*** be organized by size from smallest to largest. */
const ltc_dh_set_type ltc_dh_sets[] = {
#ifdef LTC_DH768
{  /* 768-bit MODP Group 1 - https://tools.ietf.org/html/rfc7296#appendix-B.1 */
   96,
   "DH-768",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH1024
{  /* 1024-bit MODP Group 2 - https://tools.ietf.org/html/rfc7296#appendix-B.2 */
   128,
   "DH-1024",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381"
   "FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH1536
{  /* 1536-bit MODP Group 5 - https://tools.ietf.org/html/rfc3526#section-2 */
   192,
   "DH-1536",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH2048
{  /* 2048-bit MODP Group 14 - https://tools.ietf.org/html/rfc3526#section-3 */
   256,
   "DH-2048",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
   "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
   "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
   "15728E5A8AACAA68FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH3072
{  /* 3072-bit MODP Group 15 - https://tools.ietf.org/html/rfc3526#section-4 */
   384,
   "DH-3072",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
   "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
   "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
   "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
   "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
   "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
   "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
   "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
   "43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH4096
{  /* 4096-bit MODP Group 16 - https://tools.ietf.org/html/rfc3526#section-5 */
   512,
   "DH-4096",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
   "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
   "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
   "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
   "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
   "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
   "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
   "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
   "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
   "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
   "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
   "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
   "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
   "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"
   "FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH6144
{  /* 6144-bit MODP Group 17 - https://tools.ietf.org/html/rfc3526#section-6 */
   768,
   "DH-6144",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
   "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
   "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
   "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
   "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
   "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
   "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
   "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
   "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
   "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
   "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
   "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
   "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
   "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
   "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BD"
   "F8FF9406AD9E530EE5DB382F413001AEB06A53ED9027D831"
   "179727B0865A8918DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
   "DB7F1447E6CC254B332051512BD7AF426FB8F401378CD2BF"
   "5983CA01C64B92ECF032EA15D1721D03F482D7CE6E74FEF6"
   "D55E702F46980C82B5A84031900B1C9E59E7C97FBEC7E8F3"
   "23A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
   "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE328"
   "06A1D58BB7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55C"
   "DA56C9EC2EF29632387FE8D76E3C0468043E8F663F4860EE"
   "12BF2D5B0B7474D6E694F91E6DCC4024FFFFFFFFFFFFFFFF"
},
#endif
#ifdef LTC_DH8192
{  /* 8192-bit MODP Group 18 - https://tools.ietf.org/html/rfc3526#section-7 */
   1024,
   "DH-8192",
   "2",
   "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
   "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"
   "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
   "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"
   "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
   "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"
   "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
   "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"
   "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
   "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"
   "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
   "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7"
   "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
   "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
   "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
   "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7"
   "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
   "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6"
   "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
   "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9"
   "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
   "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BD"
   "F8FF9406AD9E530EE5DB382F413001AEB06A53ED9027D831"
   "179727B0865A8918DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
   "DB7F1447E6CC254B332051512BD7AF426FB8F401378CD2BF"
   "5983CA01C64B92ECF032EA15D1721D03F482D7CE6E74FEF6"
   "D55E702F46980C82B5A84031900B1C9E59E7C97FBEC7E8F3"
   "23A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
   "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE328"
   "06A1D58BB7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55C"
   "DA56C9EC2EF29632387FE8D76E3C0468043E8F663F4860EE"
   "12BF2D5B0B7474D6E694F91E6DBE115974A3926F12FEE5E4"
   "38777CB6A932DF8CD8BEC4D073B931BA3BC832B68D9DD300"
   "741FA7BF8AFC47ED2576F6936BA424663AAB639C5AE4F568"
   "3423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9"
   "22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B"
   "4BCBC8862F8385DDFA9D4B7FA2C087E879683303ED5BDD3A"
   "062B3CF5B3A278A66D2A13F83F44F82DDF310EE074AB6A36"
   "4597E899A0255DC164F31CC50846851DF9AB48195DED7EA1"
   "B1D510BD7EE74D73FAF36BC31ECFA268359046F4EB879F92"
   "4009438B481C6CD7889A002ED5EE382BC9190DA6FC026E47"
   "9558E4475677E9AA9E3050E2765694DFC81F56E880B96E71"
   "60C980DD98EDD3DFFFFFFFFFFFFFFFFF"
},
#endif
{
   0,
   NULL,
   NULL,
   NULL
}
};

/**
  Returns the DH group size (octets) for given key
  @param key   The DH key to get the size of
  @return The group size in octets (0 on error)
 */
int dh_get_groupsize(dh_key *key)
{
   if (key == NULL) return 0;
   return mp_unsigned_bin_size(key->prime);
}

#endif /* LTC_MDH */

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/* commit time: $Format:%ai$ */