Line data    Source code

       1             : /* crypto/dsa/dsa_sign.c */
       2             : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
       3             :  * All rights reserved.
       4             :  *
       5             :  * This package is an SSL implementation written
       6             :  * by Eric Young (eay@cryptsoft.com).
       7             :  * The implementation was written so as to conform with Netscapes SSL.
       8             :  *
       9             :  * This library is free for commercial and non-commercial use as long as
      10             :  * the following conditions are aheared to.  The following conditions
      11             :  * apply to all code found in this distribution, be it the RC4, RSA,
      12             :  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
      13             :  * included with this distribution is covered by the same copyright terms
      14             :  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
      15             :  *
      16             :  * Copyright remains Eric Young's, and as such any Copyright notices in
      17             :  * the code are not to be removed.
      18             :  * If this package is used in a product, Eric Young should be given attribution
      19             :  * as the author of the parts of the library used.
      20             :  * This can be in the form of a textual message at program startup or
      21             :  * in documentation (online or textual) provided with the package.
      22             :  *
      23             :  * Redistribution and use in source and binary forms, with or without
      24             :  * modification, are permitted provided that the following conditions
      25             :  * are met:
      26             :  * 1. Redistributions of source code must retain the copyright
      27             :  *    notice, this list of conditions and the following disclaimer.
      28             :  * 2. Redistributions in binary form must reproduce the above copyright
      29             :  *    notice, this list of conditions and the following disclaimer in the
      30             :  *    documentation and/or other materials provided with the distribution.
      31             :  * 3. All advertising materials mentioning features or use of this software
      32             :  *    must display the following acknowledgement:
      33             :  *    "This product includes cryptographic software written by
      34             :  *     Eric Young (eay@cryptsoft.com)"
      35             :  *    The word 'cryptographic' can be left out if the rouines from the library
      36             :  *    being used are not cryptographic related :-).
      37             :  * 4. If you include any Windows specific code (or a derivative thereof) from
      38             :  *    the apps directory (application code) you must include an acknowledgement:
      39             :  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
      40             :  *
      41             :  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
      42             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      43             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      44             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
      45             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      46             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      47             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      48             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      49             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      50             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      51             :  * SUCH DAMAGE.
      52             :  *
      53             :  * The licence and distribution terms for any publically available version or
      54             :  * derivative of this code cannot be changed.  i.e. this code cannot simply be
      55             :  * copied and put under another distribution licence
      56             :  * [including the GNU Public Licence.]
      57             :  */
      58             : 
      59             : /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
      60             : 
      61             : #include "cryptlib.h"
      62             : #include <openssl/dsa.h>
      63             : #include <openssl/rand.h>
      64             : #include <openssl/bn.h>
      65             : 
      66           0 : DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
      67             : {
      68             : #ifdef OPENSSL_FIPS
      69             :     if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD)
      70             :         && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) {
      71             :         DSAerr(DSA_F_DSA_DO_SIGN, DSA_R_NON_FIPS_DSA_METHOD);
      72             :         return NULL;
      73             :     }
      74             : #endif
      75           0 :     return dsa->meth->dsa_do_sign(dgst, dlen, dsa);
      76             : }
      77             : 
      78           0 : int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
      79             : {
      80             : #ifdef OPENSSL_FIPS
      81             :     if (FIPS_mode() && !(dsa->meth->flags & DSA_FLAG_FIPS_METHOD)
      82             :         && !(dsa->flags & DSA_FLAG_NON_FIPS_ALLOW)) {
      83             :         DSAerr(DSA_F_DSA_SIGN_SETUP, DSA_R_NON_FIPS_DSA_METHOD);
      84             :         return 0;
      85             :     }
      86             : #endif
      87           0 :     return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp);
      88             : }
      89             : 
      90           0 : DSA_SIG *DSA_SIG_new(void)
      91             : {
      92             :     DSA_SIG *sig;
      93           0 :     sig = OPENSSL_malloc(sizeof(DSA_SIG));
      94           0 :     if (!sig)
      95             :         return NULL;
      96           0 :     sig->r = NULL;
      97           0 :     sig->s = NULL;
      98           0 :     return sig;
      99             : }
     100             : 
     101           0 : void DSA_SIG_free(DSA_SIG *sig)
     102             : {
     103           0 :     if (sig) {
     104           0 :         if (sig->r)
     105           0 :             BN_free(sig->r);
     106           0 :         if (sig->s)
     107           0 :             BN_free(sig->s);
     108           0 :         OPENSSL_free(sig);
     109             :     }
     110           0 : }