C++ (Cpp) dsa_int_validate_pqg Examples

Example #1

File: dsa_verify_key.c Project: dyemanov/firebird

/**
   Validate a DSA key

     Yeah, this function should've been called dsa_validate_key()
     in the first place and for compat-reasons we keep it
     as it was (for now).

   @param key   The key to validate
   @param stat  [out]  Result of test, 1==valid, 0==invalid
   @return CRYPT_OK if successful
*/
int dsa_verify_key(dsa_key *key, int *stat)
{
   int err;

   err = dsa_int_validate_primes(key, stat);
   if (err != CRYPT_OK || *stat == 0) return err;

   err = dsa_int_validate_pqg(key, stat);
   if (err != CRYPT_OK || *stat == 0) return err;

   return dsa_int_validate_xy(key, stat);
}

Example #2

File: dsa_set_pqg_dsaparam.c Project: ybendan/libtomcrypt

/**
  Import DSA's p, q & g from dsaparam

      dsaparam data: openssl dsaparam -outform DER -out dsaparam.der 2048

  @param dsaparam    The DSA param DER encoded data
  @param dsaparamlen The length of dhparam data
  @param key         [out] the destination for the imported key
  @return CRYPT_OK if successful.
*/
int dsa_set_pqg_dsaparam(const unsigned char *dsaparam, unsigned long dsaparamlen,
                         dsa_key *key)
{
   int err, stat;

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

   /* init key */
   err = mp_init_multi(&key->p, &key->g, &key->q, &key->x, &key->y, NULL);
   if (err != CRYPT_OK) return err;

   if ((err = der_decode_sequence_multi(dsaparam, dsaparamlen,
                                        LTC_ASN1_INTEGER, 1UL, key->p,
                                        LTC_ASN1_INTEGER, 1UL, key->q,
                                        LTC_ASN1_INTEGER, 1UL, key->g,
                                        LTC_ASN1_EOL,     0UL, NULL)) != CRYPT_OK) {
      goto LBL_ERR;
   }

   key->qord = mp_unsigned_bin_size(key->q);

   /* quick p, q, g validation, without primality testing */
   if ((err = dsa_int_validate_pqg(key, &stat)) != CRYPT_OK) {
      goto LBL_ERR;
   }
   if (stat == 0) {
      err = CRYPT_INVALID_PACKET;
      goto LBL_ERR;
   }

   return CRYPT_OK;

LBL_ERR:
   dsa_free(key);
   return err;
}

Example #3

File: dsa_set.c Project: FirebirdSQL/firebird

/**
  Import DSA's p, q & g from raw numbers
  @param p       DSA's p  in binary representation
  @param plen    The length of p
  @param q       DSA's q  in binary representation
  @param qlen    The length of q
  @param g       DSA's g  in binary representation
  @param glen    The length of g
  @param key     [out] the destination for the imported key
  @return CRYPT_OK if successful.
*/
int dsa_set_pqg(const unsigned char *p,  unsigned long plen,
                const unsigned char *q,  unsigned long qlen,
                const unsigned char *g,  unsigned long glen,
                dsa_key *key)
{
   int err, stat;

   LTC_ARGCHK(p           != NULL);
   LTC_ARGCHK(q           != NULL);
   LTC_ARGCHK(g           != NULL);
   LTC_ARGCHK(key         != NULL);
   LTC_ARGCHK(ltc_mp.name != NULL);

   /* init key */
   err = mp_init_multi(&key->p, &key->g, &key->q, &key->x, &key->y, NULL);
   if (err != CRYPT_OK) return err;

   if ((err = mp_read_unsigned_bin(key->p, (unsigned char *)p , plen)) != CRYPT_OK) { goto LBL_ERR; }
   if ((err = mp_read_unsigned_bin(key->g, (unsigned char *)g , glen)) != CRYPT_OK) { goto LBL_ERR; }
   if ((err = mp_read_unsigned_bin(key->q, (unsigned char *)q , qlen)) != CRYPT_OK) { goto LBL_ERR; }

   key->qord = mp_unsigned_bin_size(key->q);

   /* do only a quick validation, without primality testing */
   if ((err = dsa_int_validate_pqg(key, &stat)) != CRYPT_OK)                        { goto LBL_ERR; }
   if (stat == 0) {
      err = CRYPT_INVALID_PACKET;
      goto LBL_ERR;
   }

   return CRYPT_OK;

LBL_ERR:
   dsa_free(key);
   return err;
}