Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93) * Add Chacha20-Poly1305 authenticated encryption * Add general AEAD approach. * Add [email protected] algo using LibTomCrypt chacha and poly1305 routines. Chacha20-Poly1305 is generally faster than AES256 on CPU w/o dedicated AES instructions, having the same key size. Compiling in will add ~5,5kB to binary size on x86-64. function old new delta chacha_crypt - 1397 +1397 _poly1305_block - 608 +608 poly1305_done - 595 +595 dropbear_chachapoly_crypt - 457 +457 .rodata 26976 27392 +416 poly1305_process - 290 +290 poly1305_init - 221 +221 chacha_setup - 218 +218 encrypt_packet 1068 1270 +202 dropbear_chachapoly_getlength - 147 +147 decrypt_packet 756 897 +141 chacha_ivctr64 - 137 +137 read_packet 543 637 +94 dropbear_chachapoly_start - 94 +94 read_kex_algos 792 880 +88 chacha_keystream - 69 +69 dropbear_mode_chachapoly - 48 +48 sshciphers 280 320 +40 dropbear_mode_none 24 48 +24 dropbear_mode_ctr 24 48 +24 dropbear_mode_cbc 24 48 +24 dropbear_chachapoly_mac - 24 +24 dropbear_chachapoly - 24 +24 gen_new_keys 848 854 +6 ------------------------------------------------------------------------------ (add/remove: 14/0 grow/shrink: 10/0 up/down: 5388/0) Total: 5388 bytes * Add AES128-GCM and AES256-GCM authenticated encryption * Add general AES-GCM mode. * Add [email protected] and [email protected] algo using LibTomCrypt gcm routines. AES-GCM is combination of AES CTR mode and GHASH, slower than AES-CTR on CPU w/o dedicated AES/GHASH instructions therefore disabled by default. Compiling in will add ~6kB to binary size on x86-64. function old new delta gcm_process - 1060 +1060 .rodata 26976 27808 +832 gcm_gf_mult - 820 +820 gcm_add_aad - 660 +660 gcm_shift_table - 512 +512 gcm_done - 471 +471 gcm_add_iv - 384 +384 gcm_init - 347 +347 dropbear_gcm_crypt - 309 +309 encrypt_packet 1068 1270 +202 decrypt_packet 756 897 +141 gcm_reset - 118 +118 read_packet 543 637 +94 read_kex_algos 792 880 +88 sshciphers 280 360 +80 gcm_mult_h - 80 +80 dropbear_gcm_start - 62 +62 dropbear_mode_gcm - 48 +48 dropbear_mode_none 24 48 +24 dropbear_mode_ctr 24 48 +24 dropbear_mode_cbc 24 48 +24 dropbear_ghash - 24 +24 dropbear_gcm_getlength - 24 +24 gen_new_keys 848 854 +6 ------------------------------------------------------------------------------ (add/remove: 14/0 grow/shrink: 10/0 up/down: 6434/0) Total: 6434 bytes

/*
 * Dropbear - a SSH2 server
 * 
 * Copyright (c) 2002,2003 Matt Johnston
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE. */

#include "includes.h"
#include "termcodes.h"

const struct TermCode termcodes[MAX_TERMCODE+1] = {

		{0, 0}, /* TTY_OP_END */
		{VINTR, TERMCODE_CONTROLCHAR}, /* control character codes */
		{VQUIT, TERMCODE_CONTROLCHAR},
		{VERASE, TERMCODE_CONTROLCHAR},
		{VKILL, TERMCODE_CONTROLCHAR},
		{VEOF, TERMCODE_CONTROLCHAR},
		{VEOL, TERMCODE_CONTROLCHAR},
#ifdef VEOL2
		{VEOL2, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
		{VSTART, TERMCODE_CONTROLCHAR},
		{VSTOP, TERMCODE_CONTROLCHAR},
		{VSUSP, TERMCODE_CONTROLCHAR},
#ifdef VDSUSP
		{VDSUSP, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef VREPRINT
		{VREPRINT, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef AIX
		{CERASE, TERMCODE_CONTROLCHAR},
#else
#ifdef VWERASE
		{VWERASE, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#endif
#ifdef VLNEXT
		{VLNEXT, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef VFLUSH
		{VFLUSH, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef VSWTCH
		{VSWTCH, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef VSTATUS
		{VSTATUS, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
#ifdef AIX
		{CKILL, TERMCODE_CONTROLCHAR},
#elif defined(VDISCARD)
		{VDISCARD, TERMCODE_CONTROLCHAR},
#else
		{0, 0},
#endif
		{0, 0}, /* 19 */
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0}, /* 29 */
		{IGNPAR, TERMCODE_INPUT}, /* input flags */
		{PARMRK, TERMCODE_INPUT},
		{INPCK, TERMCODE_INPUT},
		{ISTRIP, TERMCODE_INPUT},
		{INLCR, TERMCODE_INPUT},
		{IGNCR, TERMCODE_INPUT},
		{ICRNL, TERMCODE_INPUT},
#ifdef IUCLC
		{IUCLC, TERMCODE_INPUT},
#else
		{0, 0},
#endif
		{IXON, TERMCODE_INPUT},
		{IXANY, TERMCODE_INPUT},
		{IXOFF, TERMCODE_INPUT},
#ifdef IMAXBEL
		{IMAXBEL, TERMCODE_INPUT},
#else
		{0, 0},
#endif
		/* IUTF8 isn't standardised in rfc4254 but is likely soon.
		 * Implemented by linux and darwin */
#ifdef IUTF8
		{IUTF8, TERMCODE_INPUT},
#else
		{0, 0},
#endif
		{0, 0}, /* 43 */
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0}, /* 49 */
		{ISIG, TERMCODE_LOCAL}, /* local flags */
		{ICANON, TERMCODE_LOCAL},
#ifdef XCASE
		{XCASE, TERMCODE_LOCAL},
#else
		{0, 0},
#endif
		{ECHO, TERMCODE_LOCAL},
		{ECHOE, TERMCODE_LOCAL},
		{ECHOK, TERMCODE_LOCAL},
		{ECHONL, TERMCODE_LOCAL},
		{NOFLSH, TERMCODE_LOCAL},
		{TOSTOP, TERMCODE_LOCAL},
		{IEXTEN, TERMCODE_LOCAL},
#ifdef ECHOCTL
		{ECHOCTL, TERMCODE_LOCAL},
#else
		{0, 0},
#endif
#ifdef ECHOKE
		{ECHOKE, TERMCODE_LOCAL},
#else
		{0, 0},
#endif
#ifdef PENDIN
		{PENDIN, TERMCODE_LOCAL},
#else
		{0, 0},
#endif
		{0, 0}, /* 63 */
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0}, /* 69 */
		{OPOST, TERMCODE_OUTPUT}, /* output flags */
#ifdef OLCUC
		{OLCUC, TERMCODE_OUTPUT},
#else
		{0, 0},
#endif
		{ONLCR, TERMCODE_OUTPUT},
#ifdef OCRNL
		{OCRNL, TERMCODE_OUTPUT},
#else
		{0, 0},
#endif
#ifdef ONOCR
		{ONOCR, TERMCODE_OUTPUT},
#else
		{0, 0},
#endif
#ifdef ONLRET
		{ONLRET, TERMCODE_OUTPUT},
#else
		{0, 0},
#endif
		{0, 0}, /* 76 */
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0},
		{0, 0}, /* 89 */
		{CS7, TERMCODE_CONTROL},
		{CS8, TERMCODE_CONTROL},
		{PARENB, TERMCODE_CONTROL},
		{PARODD, TERMCODE_CONTROL}
		/* 94 */
};