Apply by doing:
	cd /usr/src
	patch -p0 < 011_blinding.patch

And then rebuild and install OpenSSL:
	rm -fr /usr/obj/lib/libssl
	cd lib/libssl
	make obj
	make cleandir
	make depend
	make
	make install

Index: lib/libssl/src/crypto/rsa/rsa_eay.c
===================================================================
RCS file: /cvs/src/lib/libssl/src/crypto/rsa/rsa_eay.c,v
retrieving revision 1.10
retrieving revision 1.10.2.1
diff -u -r1.10 -r1.10.2.1
--- lib/libssl/src/crypto/rsa/rsa_eay.c	7 Jun 2002 03:45:34 -0000	1.10
+++ lib/libssl/src/crypto/rsa/rsa_eay.c	19 Mar 2003 01:18:19 -0000	1.10.2.1
@@ -193,6 +193,25 @@
 	return(r);
 	}
 
+static int rsa_eay_blinding(RSA *rsa, BN_CTX *ctx)
+	{
+	int ret = 1;
+	CRYPTO_w_lock(CRYPTO_LOCK_RSA);
+	/* Check again inside the lock - the macro's check is racey */
+	if(rsa->blinding == NULL)
+		ret = RSA_blinding_on(rsa, ctx);
+	CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
+	return ret;
+	}
+
+#define BLINDING_HELPER(rsa, ctx, err_instr) \
+	do { \
+		if(((rsa)->flags & RSA_FLAG_BLINDING) && \
+				((rsa)->blinding == NULL) && \
+				!rsa_eay_blinding(rsa, ctx)) \
+			err_instr \
+	} while(0)
+
 /* signing */
 static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
 	     unsigned char *to, RSA *rsa, int padding)
@@ -237,8 +256,8 @@
 		goto err;
 		}
 
-	if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
-		RSA_blinding_on(rsa,ctx);
+	BLINDING_HELPER(rsa, ctx, goto err;);
+
 	if (rsa->flags & RSA_FLAG_BLINDING)
 		if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
 
@@ -316,8 +335,8 @@
 		goto err;
 		}
 
-	if ((rsa->flags & RSA_FLAG_BLINDING) && (rsa->blinding == NULL))
-		RSA_blinding_on(rsa,ctx);
+	BLINDING_HELPER(rsa, ctx, goto err;);
+
 	if (rsa->flags & RSA_FLAG_BLINDING)
 		if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
 
Index: lib/libssl/src/crypto/rsa/rsa_lib.c
===================================================================
RCS file: /cvs/src/lib/libssl/src/crypto/rsa/rsa_lib.c,v
retrieving revision 1.6
retrieving revision 1.6.2.1
diff -u -r1.6 -r1.6.2.1
--- lib/libssl/src/crypto/rsa/rsa_lib.c	15 May 2002 02:29:16 -0000	1.6
+++ lib/libssl/src/crypto/rsa/rsa_lib.c	19 Mar 2003 01:18:19 -0000	1.6.2.1
@@ -70,7 +70,13 @@
 
 RSA *RSA_new(void)
 	{
-	return(RSA_new_method(NULL));
+	RSA *r=RSA_new_method(NULL);
+
+#ifndef OPENSSL_NO_FORCE_RSA_BLINDING
+	r->flags|=RSA_FLAG_BLINDING;
+#endif
+
+	return r;
 	}
 
 void RSA_set_default_method(const RSA_METHOD *meth)