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comparison default_options.h @ 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 26e07f7f682a
children c2c0f43ff827
comparison
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1671:5c8913b7464c 1672:3a97f14c0235
96 96
97 /* Enable "Counter Mode" for ciphers. This is more secure than 97 /* Enable "Counter Mode" for ciphers. This is more secure than
98 * CBC mode against certain attacks. It is recommended for security 98 * CBC mode against certain attacks. It is recommended for security
99 * and forwards compatibility */ 99 * and forwards compatibility */
100 #define DROPBEAR_ENABLE_CTR_MODE 1 100 #define DROPBEAR_ENABLE_CTR_MODE 1
101
102 /* Enable "Galois/Counter Mode" for ciphers. This authenticated
103 * encryption mode is combination of CTR mode and GHASH. Recommended
104 * for security and forwards compatibility, but slower than CTR on
105 * CPU w/o dedicated AES/GHASH instructions.
106 * Compiling in will add ~6kB to binary size on x86-64 */
107 #define DROPBEAR_ENABLE_GCM_MODE 0
108
109 /* Enable Chacha20-Poly1305 authenticated encryption mode. This is
110 * generally faster than AES256 on CPU w/o dedicated AES instructions,
111 * having the same key size.
112 * Compiling in will add ~5,5kB to binary size on x86-64 */
113 #define DROPBEAR_CHACHA20POLY1305 1
101 114
102 /* Message integrity. sha2-256 is recommended as a default, 115 /* Message integrity. sha2-256 is recommended as a default,
103 sha1 for compatibility */ 116 sha1 for compatibility */
104 #define DROPBEAR_SHA1_HMAC 1 117 #define DROPBEAR_SHA1_HMAC 1
105 #define DROPBEAR_SHA1_96_HMAC 1 118 #define DROPBEAR_SHA1_96_HMAC 1