view libtomcrypt/src/pk/katja/katja_import.c @ 1629:258b57b208ae

Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
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 katja_import.c
  Import a PKCS-style Katja key, Tom St Denis
*/

#ifdef LTC_MKAT

/**
  Import an KatjaPublicKey or KatjaPrivateKey [two-prime only, only support >= 1024-bit keys, defined in PKCS #1 v2.1]
  @param in      The packet to import from
  @param inlen   It's length (octets)
  @param key     [out] Destination for newly imported key
  @return CRYPT_OK if successful, upon error allocated memory is freed
*/
int katja_import(const unsigned char *in, unsigned long inlen, katja_key *key)
{
   int           err;
   void         *zero;

   LTC_ARGCHK(in  != NULL);
   LTC_ARGCHK(key != NULL);
   LTC_ARGCHK(ltc_mp.name != NULL);

   /* init key */
   if ((err = mp_init_multi(&zero, &key->d, &key->N, &key->dQ,
                            &key->dP, &key->qP, &key->p, &key->q, &key->pq, NULL)) != CRYPT_OK) {
      return err;
   }

   if ((err = der_decode_sequence_multi(in, inlen,
                                  LTC_ASN1_INTEGER, 1UL, key->N,
                                  LTC_ASN1_EOL,     0UL, NULL)) != CRYPT_OK) {
      goto LBL_ERR;
   }

   if (mp_cmp_d(key->N, 0) == LTC_MP_EQ) {
      /* it's a private key */
      if ((err = der_decode_sequence_multi(in, inlen,
                          LTC_ASN1_INTEGER, 1UL, zero,
                          LTC_ASN1_INTEGER, 1UL, key->N,
                          LTC_ASN1_INTEGER, 1UL, key->d,
                          LTC_ASN1_INTEGER, 1UL, key->p,
                          LTC_ASN1_INTEGER, 1UL, key->q,
                          LTC_ASN1_INTEGER, 1UL, key->dP,
                          LTC_ASN1_INTEGER, 1UL, key->dQ,
                          LTC_ASN1_INTEGER, 1UL, key->qP,
                          LTC_ASN1_INTEGER, 1UL, key->pq,
                          LTC_ASN1_EOL,     0UL, NULL)) != CRYPT_OK) {
         goto LBL_ERR;
      }
      key->type = PK_PRIVATE;
   } else {
      /* public we have N */
      key->type = PK_PUBLIC;
   }
   mp_clear(zero);
   return CRYPT_OK;
LBL_ERR:
   mp_clear_multi(zero,    key->d, key->N, key->dQ, key->dP,
                  key->qP, key->p, key->q, key->pq, NULL);
   return err;
}

#endif /* LTC_MRSA */


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/* commit time: $Format:%ai$ */