Make `safe' (EC)DSA nonces the default.

[openssl.git] / crypto / dsa / dsa_sign.c

diff --git a/crypto/dsa/dsa_sign.c b/crypto/dsa/dsa_sign.c
index ebb758feb552b34393d68151aa6e833f74770379..599093a4a86d647b9271060583d22e57fcd7fd2b 100644 (file)
--- a/crypto/dsa/dsa_sign.c
+++ b/crypto/dsa/dsa_sign.c
@@ -1,5 +1,5 @@
 /* crypto/dsa/dsa_sign.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
  * This package is an SSL implementation written
@@ -56,160 +56,21 @@
  * [including the GNU Public Licence.]
  */
 
-/* Origional version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
+/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
 
-#include <stdio.h>
-#include "cryptlib.h"
-#include "bn.h"
-#include "dsa.h"
-#include "rand.h"
-#include "asn1.h"
+#define OPENSSL_FIPSAPI
 
-/* data has already been hashed (probably with SHA or SHA-1). */
-/*     DSAerr(DSA_F_DSA_SIGN,DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); */
+#include "cryptlib.h"
+#include <openssl/dsa.h>
+#include <openssl/rand.h>
+#include <openssl/bn.h>
 
-int DSA_sign(type,dgst,dlen,sig,siglen,dsa)
-int type;
-unsigned char *dgst;
-int dlen;
-unsigned char *sig;    /* out */
-unsigned int *siglen;  /* out */
-DSA *dsa;
+DSA_SIG * DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
        {
-       BIGNUM *kinv=NULL,*r=NULL;
-       BIGNUM *m=NULL;
-       BIGNUM *xr=NULL,*s=NULL;
-       BN_CTX *ctx=NULL;
-       unsigned char *p;
-       int i,len=0,ret=0,reason=ERR_R_BN_LIB;
-        ASN1_INTEGER rbs,sbs;
-       MS_STATIC unsigned char rbuf[50]; /* assuming r is 20 bytes +extra */
-       MS_STATIC unsigned char sbuf[50]; /* assuming s is 20 bytes +extra */
-
-       i=BN_num_bytes(dsa->q); /* should be 20 */
-       if ((dlen > i) || (dlen > 50))
-               {
-               reason=DSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE;
-               goto err;
-               }
-
-       ctx=BN_CTX_new();
-       if (ctx == NULL) goto err;
-
-       if ((dsa->kinv == NULL) || (dsa->r == NULL))
-               {
-               if (!DSA_sign_setup(dsa,ctx,&kinv,&r)) goto err;
-               }
-       else
-               {
-               kinv=dsa->kinv;
-               dsa->kinv=NULL;
-               r=dsa->r;
-               dsa->r=NULL;
-               }
-
-       m=BN_new();
-       xr=BN_new();
-       s=BN_new();
-       if (m == NULL || xr == NULL || s == NULL) goto err;
-
-       if (BN_bin2bn(dgst,dlen,m) == NULL) goto err;
-
-       /* Compute  s = inv(k) (m + xr) mod q */
-       if (!BN_mul(xr, dsa->priv_key, r)) goto err;    /* s = xr */
-       if (!BN_add(s, xr, m)) goto err;                /* s = m + xr */
-       if (!BN_mod_mul(s,s,kinv,dsa->q,ctx)) goto err;
-
-       /*
-        * Now create a ASN.1 sequence of the integers R and S.
-        */
-       rbs.data=rbuf;
-       sbs.data=sbuf;
-       rbs.type = V_ASN1_INTEGER;
-       sbs.type = V_ASN1_INTEGER;
-       rbs.length=BN_bn2bin(r,rbs.data);
-       sbs.length=BN_bn2bin(s,sbs.data);
-
-       len =i2d_ASN1_INTEGER(&rbs,NULL);
-       len+=i2d_ASN1_INTEGER(&sbs,NULL);
-
-       p=sig;
-       ASN1_put_object(&p,1,len,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
-       i2d_ASN1_INTEGER(&rbs,&p);
-       i2d_ASN1_INTEGER(&sbs,&p);
-       *siglen=(p-sig);
-       ret=1;
-err:
-       if (!ret) DSAerr(DSA_F_DSA_SIGN,reason);
-               
-#if 1 /* do the right thing :-) */
-       if (kinv != NULL) BN_clear_free(kinv);
-       if (r != NULL) BN_clear_free(r);
-#endif
-       if (ctx != NULL) BN_CTX_free(ctx);
-       if (m != NULL) BN_clear_free(m);
-       if (xr != NULL) BN_clear_free(xr);
-       if (s != NULL) BN_clear_free(s);
-       return(ret);
+       return dsa->meth->dsa_do_sign(dgst, dlen, dsa);
        }
 
-int DSA_sign_setup(dsa,ctx_in,kinvp,rp)
-DSA *dsa;
-BN_CTX *ctx_in;
-BIGNUM **kinvp;
-BIGNUM **rp;
+int DSA_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
        {
-       BN_CTX *ctx;
-       BIGNUM *k=NULL,*kinv=NULL,*r=NULL;
-       int ret=0;
-
-       if (ctx_in == NULL)
-               {
-               if ((ctx=BN_CTX_new()) == NULL) goto err;
-               }
-       else
-               ctx=ctx_in;
-
-       r=BN_new();
-       k=BN_new();
-       if ((r == NULL) || (k == NULL))
-               goto err;
-       kinv=NULL;
-
-       if (r == NULL) goto err;
-
-       /* Get random k */
-       for (;;)
-               {
-               if (!BN_rand(k, BN_num_bits(dsa->q), 1, 0)) goto err;
-               if (BN_cmp(k,dsa->q) >= 0)
-                       BN_sub(k,k,dsa->q);
-               if (!BN_is_zero(k)) break;
-               }
-
-       /* Compute r = (g^k mod p) mod q */
-       if (!BN_mod_exp(r,dsa->g,k,dsa->p,ctx)) goto err;
-       if (!BN_mod(r,r,dsa->q,ctx)) goto err;
-
-       /* Compute  part of 's = inv(k) (m + xr) mod q' */
-       if ((kinv=BN_mod_inverse(k,dsa->q,ctx)) == NULL) goto err;
-
-       if (*kinvp != NULL) BN_clear_free(*kinvp);
-       *kinvp=kinv;
-       kinv=NULL;
-       if (*rp != NULL) BN_clear_free(*rp);
-       *rp=r;
-       ret=1;
-err:
-       if (!ret)
-               {
-               DSAerr(DSA_F_DSA_SIGN_SETUP,ERR_R_BN_LIB);
-               if (kinv != NULL) BN_clear_free(kinv);
-               if (r != NULL) BN_clear_free(r);
-               }
-       if (ctx_in == NULL) BN_CTX_free(ctx);
-       if (k != NULL) BN_clear_free(k);
-       if (kinv != NULL) BN_clear_free(kinv);
-       return(ret);
+       return dsa->meth->dsa_sign_setup(dsa, ctx_in, kinvp, rp);
        }
-