Fix memory leaks found by valgrind.

src/net_setup.c

@@ -680,6 +680,8 @@ static bool setup_myself(void) {
 		return false;
 	}
 
+	free(cipher);
+
 	regenerate_key();
 
 	/* Check if we want to use message authentication codes... */
@@ -700,6 +702,8 @@ static bool setup_myself(void) {
 		return false;
 	}
 
+	free(digest);
+
 	/* Compression */
 
 	if(get_config_int(lookup_config(config_tree, "Compression"), &myself->incompression)) {

src/net_socket.c

@@ -571,6 +571,9 @@ static void free_outgoing(outgoing_t *outgoing) {
 	if(outgoing->ai)
 		freeaddrinfo(outgoing->ai);
 
+	if(outgoing->config_tree)
+		exit_configuration(&outgoing->config_tree);
+
 	if(outgoing->name)
 		free(outgoing->name);
 

src/openssl/cipher.c

@@ -65,10 +65,8 @@ bool cipher_open_blowfish_ofb(cipher_t *cipher) {
 
 void cipher_close(cipher_t *cipher) {
 	EVP_CIPHER_CTX_cleanup(&cipher->ctx);
-	if(cipher->counter) {
-		free(cipher->counter);
-		cipher->counter = 0;
-	}
+	free(cipher->counter);
+	cipher->counter = NULL;
 }
 
 size_t cipher_keylength(const cipher_t *cipher) {

src/openssl/digest.c

@@ -78,8 +78,7 @@ bool digest_set_key(digest_t *digest, const void *key, size_t len) {
 }
 
 void digest_close(digest_t *digest) {
-	if(digest->key)
-		free(digest->key);
+	free(digest->key);
 	digest->key = NULL;
 }
 

src/protocol_key.c

@@ -258,6 +258,9 @@ bool send_ans_key(node_t *to) {
 	size_t keylen = cipher_keylength(&myself->incipher);
 	char key[keylen * 2 + 1];
 
+	cipher_close(&to->incipher);
+	digest_close(&to->indigest);
+
 	cipher_open_by_nid(&to->incipher, cipher_get_nid(&myself->incipher));
 	digest_open_by_nid(&to->indigest, digest_get_nid(&myself->indigest), digest_length(&myself->indigest));
 	to->incompression = myself->incompression;
@@ -345,6 +348,8 @@ bool ans_key_h(connection_t *c, const char *request) {
 	}
 
 	/* Don't use key material until every check has passed. */
+	cipher_close(&from->outcipher);
+	digest_close(&from->outdigest);
 	from->status.validkey = false;
 
 	if(compression < 0 || compression > 11) {

src/sptps.c

@@ -627,18 +627,17 @@ bool sptps_start(sptps_t *s, void *handle, bool initiator, bool datagram, ecdsa_
 // Stop a SPTPS session.
 bool sptps_stop(sptps_t *s) {
 	// Clean up any resources.
+	cipher_close(&s->incipher);
+	cipher_close(&s->outcipher);
+	digest_close(&s->indigest);
+	digest_close(&s->outdigest);
 	ecdh_free(&s->ecdh);
 	free(s->inbuf);
-	s->inbuf = NULL;
 	free(s->mykex);
-	s->mykex = NULL;
 	free(s->hiskex);
-	s->hiskex = NULL;
 	free(s->key);
-	s->key = NULL;
 	free(s->label);
-	s->label = NULL;
 	free(s->late);
-	s->late = NULL;
+	memset(s, 0, sizeof *s);
 	return true;
 }