示例#1
0
/**
  Sign a hash with DSA
  @param in       The hash to sign
  @param inlen    The length of the hash to sign
  @param out      [out] Where to store the signature
  @param outlen   [in/out] The max size and resulting size of the signature
  @param prng     An active PRNG state
  @param wprng    The index of the PRNG desired
  @param key      A private DSA key
  @return CRYPT_OK if successful
*/
int dsa_sign_hash(const unsigned char *in,  unsigned long inlen,
                        unsigned char *out, unsigned long *outlen,
                        prng_state *prng, int wprng, dsa_key *key)
{
   void         *r, *s;
   int           err;

   LTC_ARGCHK(in      != NULL);
   LTC_ARGCHK(out     != NULL);
   LTC_ARGCHK(outlen  != NULL);
   LTC_ARGCHK(key     != NULL);

   if (mp_init_multi(&r, &s, NULL) != CRYPT_OK) {
      return CRYPT_MEM;
   }

   if ((err = dsa_sign_hash_raw(in, inlen, r, s, prng, wprng, key)) != CRYPT_OK) {
      goto error;
   }

   err = der_encode_sequence_multi(out, outlen, 
                             LTC_ASN1_INTEGER, 1UL, r, 
                             LTC_ASN1_INTEGER, 1UL, s, 
                             LTC_ASN1_EOL,     0UL, NULL);

error:
   mp_clear_multi(r, s, NULL);
   return err;
}
示例#2
0
文件： rpmltc.c 项目： avokhmin/RPM5 
static
int rpmltcSignDSA(pgpDig dig)
	/*@*/
{
    rpmltc ltc = dig->impl;
    int rc = 0;		/* assume failure */
int xx;

if (ltc->digest == NULL || ltc->digestlen == 0) goto exit;

    _initBN(ltc->r);
    _initBN(ltc->s);
    rc = rpmltcErr(ltc, "dsa_sign_hash_raw",
		dsa_sign_hash_raw(ltc->digest, ltc->digestlen, ltc->r, ltc->s,
			&yarrow_prng, find_prng("yarrow"), &ltc->dsa));

#ifdef	DYING
rpmltcDumpDSA(__FUNCTION__, ltc);
#endif

    rc = (rc == CRYPT_OK);

exit:
SPEW(!rc, rc, dig);

    return rc;
}