Simplify BN_rand_range

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

diff --git a/crypto/dsa/dsa_ossl.c b/crypto/dsa/dsa_ossl.c
index 094356518f2e74419fbeed3a741f79c473625dd3..734681733703217a38fc1b14fbe3b195f708b345 100644 (file)
--- a/crypto/dsa/dsa_ossl.c
+++ b/crypto/dsa/dsa_ossl.c
@@ -64,6 +64,7 @@
 #include <openssl/dsa.h>
 #include <openssl/rand.h>
 #include <openssl/asn1.h>
+#include <openssl/engine.h>
 
 static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
 static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp);
@@ -91,7 +92,7 @@ dsa_finish,
 NULL
 };
 
-DSA_METHOD *DSA_OpenSSL(void)
+const DSA_METHOD *DSA_OpenSSL(void)
 {
        return &openssl_dsa_meth;
 }
@@ -179,13 +180,9 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
        kinv=NULL;
 
        /* Get random k */
-       for (;;)
-               {
-               if (!BN_rand(&k, BN_num_bits(dsa->q), 0, 0)) goto err;
-               if (BN_cmp(&k,dsa->q) >= 0)
-                       BN_sub(&k,&k,dsa->q);
-               if (!BN_is_zero(&k)) break;
-               }
+       do
+               if (!BN_rand_range(&k, dsa->q)) goto err;
+       while (BN_is_zero(&k));
 
        if ((dsa->method_mont_p == NULL) && (dsa->flags & DSA_FLAG_CACHE_MONT_P))
                {
@@ -195,7 +192,7 @@ static int dsa_sign_setup(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
                }
 
        /* Compute r = (g^k mod p) mod q */
-       if (!dsa->meth->bn_mod_exp(dsa, r,dsa->g,&k,dsa->p,ctx,
+       if (!ENGINE_get_DSA(dsa->engine)->bn_mod_exp(dsa, r,dsa->g,&k,dsa->p,ctx,
                (BN_MONT_CTX *)dsa->method_mont_p)) goto err;
        if (!BN_mod(r,r,dsa->q,ctx)) goto err;
 
@@ -273,7 +270,7 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
        if (!BN_mod(&u1,&u1,dsa->q,ctx)) goto err;
 #else
        {
-       if (!dsa->meth->dsa_mod_exp(dsa, &t1,dsa->g,&u1,dsa->pub_key,&u2,
+       if (!ENGINE_get_DSA(dsa->engine)->dsa_mod_exp(dsa, &t1,dsa->g,&u1,dsa->pub_key,&u2,
                                                dsa->p,ctx,mont)) goto err;
        /* BN_copy(&u1,&t1); */
        /* let u1 = u1 mod q */