view libtomcrypt/src/headers/tomcrypt_dropbear.h @ 1861:2b3a8026a6ce

Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +0800
parents c2c0f43ff827
children 3f4cdf839a1a
line wrap: on
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/* compile options depend on Dropbear options.h */
#include "options.h"

/* Dropbear config */

#define LTC_NOTHING

/* Use small code where possible */
#if DROPBEAR_SMALL_CODE
#define LTC_SMALL_CODE
#endif

/* Fewer entries needed */
#define TAB_SIZE      5

#if DROPBEAR_AES
#define LTC_RIJNDAEL
#endif
/* _TABLES tells it to use tables during setup, _SMALL means to use the smaller scheduled key format
 * (saves 4KB of ram), _ALL_TABLES enables all tables during setup */
#if DROPBEAR_TWOFISH
#define LTC_TWOFISH
#define LTC_TWOFISH_SMALL
#endif

#if DROPBEAR_3DES
#define LTC_DES
#endif

#if DROPBEAR_ENABLE_CBC_MODE
#define LTC_CBC_MODE
#endif

#if DROPBEAR_ENABLE_CTR_MODE
#define LTC_CTR_MODE
#endif

#if DROPBEAR_ENABLE_GCM_MODE
#define LTC_GCM_MODE
#endif

#if DROPBEAR_CHACHA20POLY1305
#define LTC_CHACHA
#define LTC_POLY1305
#endif

#if DROPBEAR_SHA512
#define LTC_SHA512
#endif

#if DROPBEAR_SHA384
#define LTC_SHA384
#endif

#if DROPBEAR_SHA256
#define LTC_SHA256
#endif

#define LTC_SHA1

#if DROPBEAR_MD5
#define LTC_MD5
#endif

/* ECC */
#if DROPBEAR_ECC
#define LTC_MECC
#define LTM_DESC

/* use Shamir's trick for point mul (speeds up signature verification) */
#define LTC_ECC_SHAMIR

#if DROPBEAR_ECC_256
#define LTC_ECC256
#endif
#if DROPBEAR_ECC_384
#define LTC_ECC384
#endif
#if DROPBEAR_ECC_521
#define LTC_ECC521
#endif

#endif /* DROPBEAR_ECC */

#define LTC_HMAC
#define LTC_HASH_HELPERS

#define LTC_NO_TEST

#define LTC_BASE64

/* end Dropbear config */