Mercurial > dropbear
view libtomcrypt/src/modes/f8/f8_test_mode.c @ 1715:3974f087d9c0
Disallow leading lines before the ident for server (#102)
Per RFC4253 4.2 clients must be able to process other lines of data
before the version string, server behavior is not defined neither
with MUST/SHOULD nor with MAY.
If server process up to 50 lines too - it may cause too long hanging
session with invalid/evil client that consume host resources and
potentially may lead to DDoS on poor embedded boxes.
Let's require first line from client to be version string and fail
early if it's not - matches both RFC and real OpenSSH behavior.
author | Vladislav Grishenko <themiron@users.noreply.github.com> |
---|---|
date | Mon, 15 Jun 2020 18:22:18 +0500 |
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: $Format:%ai$ */