Mercurial > dropbear
diff common-algo.c @ 994:5c5ade336926
Prefer stronger algorithms in algorithm negotiation.
Prefer diffie-hellman-group14-sha1 (2048 bit) over
diffie-hellman-group1-sha1 (1024 bit).
Due to meet-in-the-middle attacks the effective key length of
three key 3DES is 112 bits. AES is stronger and faster then 3DES.
Prefer to delay the start of compression until after authentication
has completed. This avoids exposing compression code to attacks
from unauthenticated users.
(github pull request #9)
| author | Fedor Brunner <fedor.brunner@azet.sk> |
|---|---|
| date | Fri, 23 Jan 2015 23:00:25 +0800 |
| parents | 731f624af902 |
| children | 47643024fc90 |
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--- a/common-algo.c Fri Jan 23 22:59:30 2015 +0800 +++ b/common-algo.c Fri Jan 23 23:00:25 2015 +0800 @@ -141,9 +141,6 @@ #ifdef DROPBEAR_AES128 {"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr}, #endif -#ifdef DROPBEAR_3DES - {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr}, -#endif #ifdef DROPBEAR_AES256 {"aes256-ctr", 0, &dropbear_aes256, 1, &dropbear_mode_ctr}, #endif @@ -153,9 +150,6 @@ #ifdef DROPBEAR_AES128 {"aes128-cbc", 0, &dropbear_aes128, 1, &dropbear_mode_cbc}, #endif -#ifdef DROPBEAR_3DES - {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc}, -#endif #ifdef DROPBEAR_AES256 {"aes256-cbc", 0, &dropbear_aes256, 1, &dropbear_mode_cbc}, #endif @@ -166,6 +160,12 @@ #ifdef DROPBEAR_TWOFISH128 {"twofish128-cbc", 0, &dropbear_twofish128, 1, &dropbear_mode_cbc}, #endif +#ifdef DROPBEAR_3DES + {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr}, +#endif +#ifdef DROPBEAR_3DES + {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc}, +#endif #ifdef DROPBEAR_BLOWFISH {"blowfish-cbc", 0, &dropbear_blowfish, 1, &dropbear_mode_cbc}, #endif @@ -200,8 +200,8 @@ #ifndef DISABLE_ZLIB algo_type ssh_compress[] = { + {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL}, {"zlib", DROPBEAR_COMP_ZLIB, NULL, 1, NULL}, - {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL}, {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL}, {NULL, 0, NULL, 0, NULL} }; @@ -270,8 +270,8 @@ {"ecdh-sha2-nistp256", 0, &kex_ecdh_nistp256, 1, NULL}, #endif #endif + {"diffie-hellman-group14-sha1", 0, &kex_dh_group14, 1, NULL}, {"diffie-hellman-group1-sha1", 0, &kex_dh_group1, 1, NULL}, - {"diffie-hellman-group14-sha1", 0, &kex_dh_group14, 1, NULL}, #ifdef USE_KEXGUESS2 {KEXGUESS2_ALGO_NAME, KEXGUESS2_ALGO_ID, NULL, 1, NULL}, #endif