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dropbear: disable 3des, cbc mode, dss support, saves about 5k gzipped

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While technically required by the RFC, they are usually completely
unused (DSA), or have security issues (3DES, CBC)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 46814
This commit is contained in:
Felix Fietkau 2015-09-08 08:55:10 +00:00
parent b13d8e55a7
commit a4cf4c35af
1 changed files with 20 additions and 1 deletions
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21
package/network/services/dropbear/patches/120-openwrt_options.patch
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@ -18,7 +18,12 @@
/* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */ /* Whether to support "-c" and "-m" flags to choose ciphers/MACs at runtime */
#define ENABLE_USER_ALGO_LIST #define ENABLE_USER_ALGO_LIST
@@ -95,8 +95,8 @@ much traffic. */ @@ -91,16 +91,16 @@ much traffic. */
* Including multiple keysize variants the same cipher
* (eg AES256 as well as AES128) will result in a minimal size increase.*/
#define DROPBEAR_AES128
-#define DROPBEAR_3DES
+/*#define DROPBEAR_3DES*/
#define DROPBEAR_AES256 #define DROPBEAR_AES256
/* Compiling in Blowfish will add ~6kB to runtime heap memory usage */ /* Compiling in Blowfish will add ~6kB to runtime heap memory usage */
/*#define DROPBEAR_BLOWFISH*/ /*#define DROPBEAR_BLOWFISH*/
@ -29,6 +34,11 @@
/* Enable CBC mode for ciphers. This has security issues though /* Enable CBC mode for ciphers. This has security issues though
* is the most compatible with older SSH implementations */ * is the most compatible with older SSH implementations */
-#define DROPBEAR_ENABLE_CBC_MODE
+/*#define DROPBEAR_ENABLE_CBC_MODE*/
/* Enable "Counter Mode" for ciphers. This is more secure than normal
* CBC mode against certain attacks. It is recommended for security
@@ -131,9 +131,9 @@ If you test it please contact the Dropbe @@ -131,9 +131,9 @@ If you test it please contact the Dropbe
* If you disable MD5, Dropbear will fall back to SHA1 fingerprints, * If you disable MD5, Dropbear will fall back to SHA1 fingerprints,
* which are not the standard form. */ * which are not the standard form. */
@ -42,6 +52,15 @@
#define DROPBEAR_MD5_HMAC #define DROPBEAR_MD5_HMAC
/* You can also disable integrity. Don't bother disabling this if you're /* You can also disable integrity. Don't bother disabling this if you're
@@ -146,7 +146,7 @@ If you test it please contact the Dropbe
* Removing either of these won't save very much space.
* SSH2 RFC Draft requires dss, recommends rsa */
#define DROPBEAR_RSA
-#define DROPBEAR_DSS
+/*#define DROPBEAR_DSS*/
/* ECDSA is significantly faster than RSA or DSS. Compiling in ECC
* code (either ECDSA or ECDH) increases binary size - around 30kB
* on x86-64 */
@@ -189,7 +189,7 @@ If you test it please contact the Dropbe @@ -189,7 +189,7 @@ If you test it please contact the Dropbe
/* Whether to print the message of the day (MOTD). This doesn't add much code /* Whether to print the message of the day (MOTD). This doesn't add much code