From a9e69b1252e5918b6d8ada1209ccefde301cfa26 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Thu, 5 Sep 2019 19:50:24 +0200
Subject: idevice: Fix handling SSL/TLS version selection for OpenSSL 1.1.0+
 and for older devices

---
 src/idevice.c  | 30 +++++++++++++++++++-----------
 src/idevice.h  |  4 +++-
 src/lockdown.c |  4 ++--
 3 files changed, 24 insertions(+), 14 deletions(-)

diff --git a/src/idevice.c b/src/idevice.c
index 382e9d2..fd1f4b5 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -320,7 +320,7 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_connect(idevice_t device, uint16_t
 		new_connection->type = CONNECTION_USBMUXD;
 		new_connection->data = (void*)(long)sfd;
 		new_connection->ssl_data = NULL;
-		idevice_get_udid(device, &new_connection->udid);
+		new_connection->device = device;
 		*connection = new_connection;
 		return IDEVICE_E_SUCCESS;
 	} else {
@@ -348,9 +348,6 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_disconnect(idevice_connection_t con
 		debug_info("Unknown connection type %d", connection->type);
 	}
 
-	if (connection->udid)
-		free(connection->udid);
-
 	free(connection);
 	connection = NULL;
 
@@ -759,9 +756,9 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_enable_ssl(idevice_conne
 #endif
 	plist_t pair_record = NULL;
 
-	userpref_read_pair_record(connection->udid, &pair_record);
+	userpref_read_pair_record(connection->device->udid, &pair_record);
 	if (!pair_record) {
-		debug_info("ERROR: Failed enabling SSL. Unable to read pair record for udid %s.", connection->udid);
+		debug_info("ERROR: Failed enabling SSL. Unable to read pair record for udid %s.", connection->device->udid);
 		return ret;
 	}
 
@@ -789,16 +786,27 @@ LIBIMOBILEDEVICE_API idevice_error_t idevice_connection_enable_ssl(idevice_conne
 		return ret;
 	}
 
-	/* force use of TLSv1 */
+#if OPENSSL_VERSION_NUMBER < 0x10100002L || \
+	(defined(LIBRESSL_VERSION_NUMBER) && (LIBRESSL_VERSION_NUMBER < 0x2060000fL))
+	/* force use of TLSv1 for older devices */
+	if (connection->device->version < DEVICE_VERSION(10,0,0)) {
 #ifdef SSL_OP_NO_TLSv1_1
-	int opts = SSL_OP_NO_TLSv1_1;
+		long opts = SSL_CTX_get_options(ssl_ctx);
+		opts |= SSL_OP_NO_TLSv1_1;
 #ifdef SSL_OP_NO_TLSv1_2
-	opts |= SSL_OP_NO_TLSv1_2;
+		opts |= SSL_OP_NO_TLSv1_2;
 #endif
 #ifdef SSL_OP_NO_TLSv1_3
-	opts |= SSL_OP_NO_TLSv1_3;
+		opts |= SSL_OP_NO_TLSv1_3;
+#endif
+		SSL_CTX_set_options(ssl_ctx, opts);
 #endif
-	SSL_CTX_set_options(ssl_ctx, SSL_OP_ALL | opts);
+	}
+#else
+	SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_VERSION);
+	if (connection->device->version < DEVICE_VERSION(10,0,0)) {
+		SSL_CTX_set_max_proto_version(ssl_ctx, TLS1_VERSION);
+	}
 #endif
 
 	BIO* membp;
diff --git a/src/idevice.h b/src/idevice.h
index 94e828b..f403c55 100644
--- a/src/idevice.h
+++ b/src/idevice.h
@@ -46,6 +46,8 @@
 #include "common/userpref.h"
 #include "libimobiledevice/libimobiledevice.h"
 
+#define DEVICE_VERSION(maj, min, patch) (((maj & 0xFF) << 16) | ((min & 0xFF) << 8) | (patch & 0xFF))
+
 enum connection_type {
 	CONNECTION_USBMUXD = 1
 };
@@ -66,7 +68,7 @@ struct ssl_data_private {
 typedef struct ssl_data_private *ssl_data_t;
 
 struct idevice_connection_private {
-	char *udid;
+	idevice_t device;
 	enum connection_type type;
 	void *data;
 	ssl_data_t ssl_data;
diff --git a/src/lockdown.c b/src/lockdown.c
index 23f2782..694fb47 100644
--- a/src/lockdown.c
+++ b/src/lockdown.c
@@ -715,7 +715,7 @@ LIBIMOBILEDEVICE_API lockdownd_error_t lockdownd_client_new_with_handshake(idevi
 			char *s_version = NULL;
 			plist_get_string_val(p_version, &s_version);
 			if (s_version && sscanf(s_version, "%d.%d.%d", &vers[0], &vers[1], &vers[2]) >= 2) {
-				device->version = ((vers[0] & 0xFF) << 16) | ((vers[1] & 0xFF) << 8) | (vers[2] & 0xFF);
+				device->version = DEVICE_VERSION(vers[0], vers[1], vers[2]);
 			}
 			free(s_version);
 		}
@@ -738,7 +738,7 @@ LIBIMOBILEDEVICE_API lockdownd_error_t lockdownd_client_new_with_handshake(idevi
 	plist_free(pair_record);
 	pair_record = NULL;
 
-	if (device->version < 0x070000) {
+	if (device->version < DEVICE_VERSION(7,0,0)) {
 		/* for older devices, we need to validate pairing to receive trusted host status */
 		ret = lockdownd_validate_pair(client_loc, NULL);
 
-- 
cgit v1.1-32-gdbae