Mercurial > dropbear

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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
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 25 May 2020 20:50:25 +0500
parents d32bcb5c557d
children 04155ce30759
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1 Dropbear contains a number of components from different sources, hence there
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2 are a few licenses and authors involved. All licenses are fairly
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3 non-restrictive.
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6 The majority of code is written by Matt Johnston, under the license below.
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7
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8 Portions of the client-mode work are (c) 2004 Mihnea Stoenescu, under the
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9 same license:
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11 Copyright (c) 2002-2015 Matt Johnston
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12 Portions copyright (c) 2004 Mihnea Stoenescu
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13 All rights reserved.
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15 Permission is hereby granted, free of charge, to any person obtaining a copy
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16 of this software and associated documentation files (the "Software"), to deal
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17 in the Software without restriction, including without limitation the rights
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18 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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19 copies of the Software, and to permit persons to whom the Software is
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20 furnished to do so, subject to the following conditions:
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22 The above copyright notice and this permission notice shall be included in all
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23 copies or substantial portions of the Software.
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25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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26 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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27 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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28 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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29 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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30 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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31 SOFTWARE.
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33 =====
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35 LibTomCrypt and LibTomMath are written by Tom St Denis, and are Public Domain.
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37 =====
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39 sshpty.c is taken from OpenSSH 3.5p1,
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40 Copyright (c) 1995 Tatu Ylonen <[email protected]>, Espoo, Finland
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41 All rights reserved
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42 "As far as I am concerned, the code I have written for this software
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43 can be used freely for any purpose. Any derived versions of this
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44 software must be clearly marked as such, and if the derived work is
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45 incompatible with the protocol description in the RFC file, it must be
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46 called by a name other than "ssh" or "Secure Shell". "
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48 =====
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50 loginrec.c
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52 atomicio.h
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53 atomicio.c
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54 and strlcat() (included in util.c) are from OpenSSH 3.6.1p2, and are licensed
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55 under the 2 point BSD license.
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57 loginrec is written primarily by Andre Lucas, atomicio.c by Theo de Raadt.
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59 strlcat() is (c) Todd C. Miller
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63 Import code in keyimport.c is modified from PuTTY's import.c, licensed as
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64 follows:
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66 PuTTY is copyright 1997-2003 Simon Tatham.
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68 Portions copyright Robert de Bath, Joris van Rantwijk, Delian
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69 Delchev, Andreas Schultz, Jeroen Massar, Wez Furlong, Nicolas Barry,
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70 Justin Bradford, and CORE SDI S.A.
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72 Permission is hereby granted, free of charge, to any person
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73 obtaining a copy of this software and associated documentation files
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74 (the "Software"), to deal in the Software without restriction,
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75 including without limitation the rights to use, copy, modify, merge,
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76 publish, distribute, sublicense, and/or sell copies of the Software,
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77 and to permit persons to whom the Software is furnished to do so,
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78 subject to the following conditions:
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80 The above copyright notice and this permission notice shall be
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81 included in all copies or substantial portions of the Software.
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83 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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84 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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85 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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86 NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE
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87 FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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88 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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89 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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93 crypto25519.c:
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94 crypto26619.h:
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96 Modified TweetNaCl version 20140427, a self-contained public-domain C library.
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97 https://tweetnacl.cr.yp.to/
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99 Contributors (alphabetical order)
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100 Daniel J. Bernstein, University of Illinois at Chicago and Technische
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101 Universiteit Eindhoven
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102 Bernard van Gastel, Radboud Universiteit Nijmegen
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103 Wesley Janssen, Radboud Universiteit Nijmegen
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104 Tanja Lange, Technische Universiteit Eindhoven
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105 Peter Schwabe, Radboud Universiteit Nijmegen
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106 Sjaak Smetsers, Radboud Universiteit Nijmegen
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107
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108 Acknowledgments
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109 This work was supported by the U.S. National Science Foundation under grant
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110 1018836. "Any opinions, findings, and conclusions or recommendations expressed
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111 in this material are those of the author(s) and do not necessarily reflect the
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112 views of the National Science Foundation."
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113 This work was supported by the Netherlands Organisation for Scientific
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114 Research (NWO) under grant 639.073.005 and Veni 2013 project 13114.