view libtomcrypt/src/pk/pkcs1/pkcs_1_os2ip.c @ 1715:3974f087d9c0

Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents 6dba84798cd5
children
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/* 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.h"

/**
  @file pkcs_1_os2ip.c
  Octet to Integer OS2IP, Tom St Denis
*/
#ifdef LTC_PKCS_1

/**
  Read a binary string into an mp_int
  @param n          [out] The mp_int destination
  @param in         The binary string to read
  @param inlen      The length of the binary string
  @return CRYPT_OK if successful
*/
int pkcs_1_os2ip(void *n, unsigned char *in, unsigned long inlen)
{
   return mp_read_unsigned_bin(n, in, inlen);
}

#endif /* LTC_PKCS_1 */


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