Introduce extra delay before closing unauthenticated sessions To make it harder for attackers, introduce a delay to keep an unauthenticated session open a bit longer, thus blocking a connection slot until after the delay. Without this, while there is a limit on the amount of attempts an attacker can make at the same time (MAX_UNAUTH_PER_IP), the time taken by dropbear to handle one attempt is still short and thus for each of the allowed parallel attempts many attempts can be chained one after the other. The attempt rate is then: "MAX_UNAUTH_PER_IP / <process time of one attempt>". With the delay, this rate becomes: "MAX_UNAUTH_PER_IP / UNAUTH_CLOSE_DELAY".

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 */
#include  <tomcrypt_test.h>

int misc_test(void)
{
#ifdef LTC_HKDF
   DO(hkdf_test());
#endif
#ifdef LTC_PKCS_5
   DO(pkcs_5_test());
#endif
#ifdef LTC_BASE64
   DO(base64_test());
#endif
#ifdef LTC_ADLER32
   DO(adler32_test());
#endif
#ifdef LTC_CRC32
   DO(crc32_test());
#endif
   return 0;
}

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