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annotate dropbearconvert.1 @ 1672:3a97f14c0235

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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 80cacacfec23
children 863f31b4cf3c
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1 .TH dropbearconvert 1
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2 .SH NAME
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3 dropbearconvert \- convert between Dropbear and OpenSSH private key formats
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4 .SH SYNOPSIS
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5 .B dropbearconvert
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6 .I input_type
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7 .I output_type
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8 .I input_file
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9 .I output_file
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10 .SH DESCRIPTION
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11 .B Dropbear
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12 and
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13 .B OpenSSH
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14 SSH implementations have different private key formats.
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15 .B dropbearconvert
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16 can convert between the two.
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17 .P
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18 Dropbear uses the same SSH public key format as OpenSSH, it can be extracted
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19 from a private key by using
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20 .B dropbearkey \-y
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21 .P
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22 Encrypted private keys are not supported, use ssh-keygen(1) to decrypt them
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23 first.
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24 .SH ARGUMENTS
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25 .TP
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26 .I input_type
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27 Either
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28 .I dropbear
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29 or
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30 .I openssh
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31 .TP
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32 .I output_type
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33 Either
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34 .I dropbear
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35 or
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36 .I openssh
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37 .TP
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38 .I input_file
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39 An existing Dropbear or OpenSSH private key file
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40 .TP
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41 .I output_file
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42 The path to write the converted private key file. For client authentication ~/.ssh/id_dropbear is loaded by default
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43 .SH EXAMPLE
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44 # dropbearconvert openssh dropbear ~/.ssh/id_rsa ~/.ssh/id_dropbear
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45 .SH AUTHOR
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46 Matt Johnston ([email protected]).
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47 .SH SEE ALSO
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48 dropbearkey(1), ssh-keygen(1)
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49 .P
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50 https://matt.ucc.asn.au/dropbear/dropbear.html