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Use faster primality testing in libtomcrypt

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This can only be used if DSS is disabled
This commit is contained in:
Matt Johnston 2022-11-10 11:52:55 +08:00
parent cdaf52aead
commit 0e70732e1e
2 changed files with 13 additions and 0 deletions
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4
default_options.h
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@ -133,6 +133,10 @@ IMPORTANT: Some options will require "make clean" after changes */
* is not recommended for new keys. * is not recommended for new keys.
* See: RSA_PRIV_FILENAME and DSS_PRIV_FILENAME */ * See: RSA_PRIV_FILENAME and DSS_PRIV_FILENAME */
#define DROPBEAR_RSA 1 #define DROPBEAR_RSA 1
/* RSA key generation will be faster with bundled libtommath
* if DROPBEAR_DSS is disabled.
* https://github.com/mkj/dropbear/issues/174#issuecomment-1267374858
*/
#define DROPBEAR_DSS 1 #define DROPBEAR_DSS 1
/* ECDSA is significantly faster than RSA or DSS. Compiling in ECC /* ECDSA is significantly faster than RSA or DSS. Compiling in ECC
* code (either ECDSA or ECDH) increases binary size - around 30kB * code (either ECDSA or ECDH) increases binary size - around 30kB

9
sysoptions.h
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@ -164,6 +164,15 @@
#define DROPBEAR_RSA_SHA256 DROPBEAR_RSA #define DROPBEAR_RSA_SHA256 DROPBEAR_RSA
#endif #endif
/* Miller-Rabin primality testing is sufficient for RSA but not DSS.
* It's a compile-time setting for libtommath, we can get a speedup
* for key generation if DSS is disabled.
* https://github.com/mkj/dropbear/issues/174#issuecomment-1267374858
*/
#ifndef DROPBEAR_DSS
#define LTM_USE_ONLY_MR 1
#endif
/* hashes which will be linked and registered */ /* hashes which will be linked and registered */
#define DROPBEAR_SHA1 (DROPBEAR_RSA_SHA1 || DROPBEAR_DSS \ #define DROPBEAR_SHA1 (DROPBEAR_RSA_SHA1 || DROPBEAR_DSS \
|| DROPBEAR_SHA1_HMAC || DROPBEAR_SHA1_96_HMAC \ || DROPBEAR_SHA1_HMAC || DROPBEAR_SHA1_96_HMAC \