1 files changed, 22 insertions, 12 deletions

diff --git a/lib/libcrypto/dh/dh_key.c b/lib/libcrypto/dh/dh_key.c
index 0c7eeaf260b..6915d79dcc2 100644
--- a/lib/libcrypto/dh/dh_key.c
+++ b/lib/libcrypto/dh/dh_key.c
@@ -61,6 +61,7 @@
 #include <openssl/bn.h>
 #include <openssl/rand.h>
 #include <openssl/dh.h>
+#include <openssl/engine.h>
 
 static int generate_key(DH *dh);
 static int compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh);
@@ -72,12 +73,12 @@ static int dh_finish(DH *dh);
 
 int DH_generate_key(DH *dh)
 	{
-	return dh->meth->generate_key(dh);
+	return ENGINE_get_DH(dh->engine)->generate_key(dh);
 	}
 
 int DH_compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh)
 	{
-	return dh->meth->compute_key(key, pub_key, dh);
+	return ENGINE_get_DH(dh->engine)->compute_key(key, pub_key, dh);
 	}
 
 static DH_METHOD dh_ossl = {
@@ -137,8 +138,9 @@ static int generate_key(DH *dh)
 		}
 	mont=(BN_MONT_CTX *)dh->method_mont_p;
 
-	if (!dh->meth->bn_mod_exp(dh, pub_key,dh->g,priv_key,dh->p,&ctx,mont))
-								goto err;
+	if (!ENGINE_get_DH(dh->engine)->bn_mod_exp(dh, pub_key, dh->g,
+				priv_key,dh->p,&ctx,mont))
+		goto err;
 		
 	dh->pub_key=pub_key;
 	dh->priv_key=priv_key;
@@ -177,7 +179,8 @@ static int compute_key(unsigned char *key, BIGNUM *pub_key, DH *dh)
 		}
 
 	mont=(BN_MONT_CTX *)dh->method_mont_p;
-	if (!dh->meth->bn_mod_exp(dh, tmp,pub_key,dh->priv_key,dh->p,&ctx,mont))
+	if (!ENGINE_get_DH(dh->engine)->bn_mod_exp(dh, tmp, pub_key,
+				dh->priv_key,dh->p,&ctx,mont))
 		{
 		DHerr(DH_F_DH_COMPUTE_KEY,ERR_R_BN_LIB);
 		goto err;
@@ -193,19 +196,26 @@ err:
 static int dh_bn_mod_exp(DH *dh, BIGNUM *r, BIGNUM *a, const BIGNUM *p,
 			const BIGNUM *m, BN_CTX *ctx,
 			BN_MONT_CTX *m_ctx)
-{
-	return BN_mod_exp_mont(r, a, p, m, ctx, m_ctx);
-}
+	{
+	if (a->top == 1)
+		{
+		BN_ULONG A = a->d[0];
+		return BN_mod_exp_mont_word(r,A,p,m,ctx,m_ctx);
+		}
+	else
+		return BN_mod_exp_mont(r,a,p,m,ctx,m_ctx);
+	}
+
 
 static int dh_init(DH *dh)
-{
+	{
 	dh->flags |= DH_FLAG_CACHE_MONT_P;
 	return(1);
-}
+	}
 
 static int dh_finish(DH *dh)
-{
+	{
 	if(dh->method_mont_p)
 		BN_MONT_CTX_free((BN_MONT_CTX *)dh->method_mont_p);
 	return(1);
-}
+	}