Simplify ssl_add_cert_chain logic.

ssl/ssl_cert.c

@@ -1113,50 +1113,40 @@ static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
 	{
 	BUF_MEM *buf = s->init_buf;
-	int no_chain;
 	int i;
 
 	X509 *x;
 	STACK_OF(X509) *extra_certs;
 	X509_STORE *chain_store;
 
-	if (cpk)
-		x = cpk->x509;
-	else
-		x = NULL;
+	/* TLSv1 sends a chain with nothing in it, instead of an alert */
+	if (!BUF_MEM_grow_clean(buf,10))
+		{
+		SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
+		return 0;
+		}
 
-	if (s->cert->chain_store)
-		chain_store = s->cert->chain_store;
-	else
-		chain_store = s->ctx->cert_store;
+	if (!cpk || !cpk->x509)
+		return 1;
+
+	x = cpk->x509;
 
 	/* If we have a certificate specific chain use it, else use
 	 * parent ctx.
 	 */
-	if (cpk && cpk->chain)
+	if (cpk->chain)
 		extra_certs = cpk->chain;
 	else
 		extra_certs = s->ctx->extra_certs;
 
 	if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
-		no_chain = 1;
+		chain_store = NULL;
+	else if (s->cert->chain_store)
+		chain_store = s->cert->chain_store;
 	else
-		no_chain = 0;
+		chain_store = s->ctx->cert_store;
 
-	/* TLSv1 sends a chain with nothing in it, instead of an alert */
-	if (!BUF_MEM_grow_clean(buf,10))
-		{
-		SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
-		return 0;
-		}
-	if (x != NULL)
-		{
-		if (no_chain)
-			{
-			if (!ssl_add_cert_to_buf(buf, l, x))
-				return 0;
-			}
-		else
+	if (chain_store)
 		{
 		X509_STORE_CTX xs_ctx;
 
@@ -1180,14 +1170,17 @@ int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
 			}
 		X509_STORE_CTX_cleanup(&xs_ctx);
 		}
-		}
+	else
+		{
+		if (!ssl_add_cert_to_buf(buf, l, x))
+			return 0;
 		for (i=0; i<sk_X509_num(extra_certs); i++)
 			{
 			x=sk_X509_value(extra_certs,i);
 			if (!ssl_add_cert_to_buf(buf, l, x))
 				return 0;
 			}
-
+		}
 	return 1;
 	}