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-rw-r--r--include/libiphone/libiphone.h1
-rw-r--r--src/iphone.c274
-rw-r--r--src/iphone.h10
3 files changed, 268 insertions, 17 deletions
diff --git a/include/libiphone/libiphone.h b/include/libiphone/libiphone.h
index 4ace1ec..b07bd5d 100644
--- a/include/libiphone/libiphone.h
+++ b/include/libiphone/libiphone.h
@@ -39,6 +39,7 @@ extern "C" {
#define IPHONE_E_NO_DEVICE -3
#define IPHONE_E_NOT_ENOUGH_DATA -4
#define IPHONE_E_BAD_HEADER -5
+#define IPHONE_E_SSL_ERROR -6
typedef int16_t iphone_error_t;
diff --git a/src/iphone.c b/src/iphone.c
index ce90299..8bc9e8d 100644
--- a/src/iphone.c
+++ b/src/iphone.c
@@ -26,6 +26,7 @@
#include <arpa/inet.h>
#include <usbmuxd.h>
+#include <gnutls/gnutls.h>
#include "iphone.h"
#include "debug.h"
@@ -222,6 +223,7 @@ iphone_error_t iphone_device_connect(iphone_device_t device, uint16_t dst_port,
iphone_connection_t new_connection = (iphone_connection_t)malloc(sizeof(struct iphone_connection_int));
new_connection->type = CONNECTION_USBMUXD;
new_connection->data = (void*)sfd;
+ new_connection->ssl_data = NULL;
*connection = new_connection;
return IPHONE_E_SUCCESS;
} else {
@@ -243,6 +245,10 @@ iphone_error_t iphone_device_disconnect(iphone_connection_t connection)
if (!connection) {
return IPHONE_E_INVALID_ARG;
}
+ /* shut down ssl if enabled */
+ if (connection->ssl_data) {
+ iphone_connection_disable_ssl(connection);
+ }
iphone_error_t result = IPHONE_E_UNKNOWN_ERROR;
if (connection->type == CONNECTION_USBMUXD) {
usbmuxd_disconnect((int)(connection->data));
@@ -255,6 +261,29 @@ iphone_error_t iphone_device_disconnect(iphone_connection_t connection)
}
/**
+ * Internally used function to send raw data over the given connection.
+ */
+static iphone_error_t internal_connection_send(iphone_connection_t connection, const char *data, uint32_t len, uint32_t *sent_bytes)
+{
+ if (!connection || !data) {
+ return IPHONE_E_INVALID_ARG;
+ }
+
+ if (connection->type == CONNECTION_USBMUXD) {
+ int res = usbmuxd_send((int)(connection->data), data, len, sent_bytes);
+ if (res < 0) {
+ debug_info("ERROR: usbmuxd_send returned %d (%s)", res, strerror(-res));
+ return IPHONE_E_UNKNOWN_ERROR;
+ }
+ return IPHONE_E_SUCCESS;
+ } else {
+ debug_info("Unknown connection type %d", connection->type);
+ }
+ return IPHONE_E_UNKNOWN_ERROR;
+
+}
+
+/**
* Send data to a device via the given connection.
*
* @param connection The connection to send data over.
@@ -267,14 +296,36 @@ iphone_error_t iphone_device_disconnect(iphone_connection_t connection)
*/
iphone_error_t iphone_device_send(iphone_connection_t connection, const char *data, uint32_t len, uint32_t *sent_bytes)
{
- if (!connection || !data) {
+ if (!connection || !data || (connection->ssl_data && !connection->ssl_data->session)) {
+ return IPHONE_E_INVALID_ARG;
+ }
+
+ if (connection->ssl_data) {
+ ssize_t sent = gnutls_record_send(connection->ssl_data->session, (void*)data, (size_t)len);
+ if ((uint32_t)sent == (uint32_t)len) {
+ *sent_bytes = sent;
+ return IPHONE_E_SUCCESS;
+ }
+ *sent_bytes = 0;
+ return IPHONE_E_SSL_ERROR;
+ }
+ return internal_connection_send(connection, data, len, sent_bytes);
+}
+
+/**
+ * Internally used function for receiving raw data over the given connection
+ * using a timeout.
+ */
+static iphone_error_t internal_connection_recv_timeout(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
+{
+ if (!connection) {
return IPHONE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
- int res = usbmuxd_send((int)(connection->data), data, len, sent_bytes);
+ int res = usbmuxd_recv_timeout((int)(connection->data), data, len, recv_bytes, timeout);
if (res < 0) {
- debug_info("ERROR: usbmuxd_send returned %d (%s)", res, strerror(-res));
+ debug_info("ERROR: usbmuxd_recv_timeout returned %d (%s)", res, strerror(-res));
return IPHONE_E_UNKNOWN_ERROR;
}
return IPHONE_E_SUCCESS;
@@ -301,16 +352,38 @@ iphone_error_t iphone_device_send(iphone_connection_t connection, const char *da
*/
iphone_error_t iphone_device_recv_timeout(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes, unsigned int timeout)
{
+ if (!connection || (connection->ssl_data && !connection->ssl_data->session)) {
+ return IPHONE_E_INVALID_ARG;
+ }
+
+ if (connection->ssl_data) {
+ ssize_t received = gnutls_record_recv(connection->ssl_data->session, (void*)data, (size_t)len);
+ if (received > 0) {
+ *recv_bytes = received;
+ return IPHONE_E_SUCCESS;
+ }
+ *recv_bytes = 0;
+ return IPHONE_E_SSL_ERROR;
+ }
+ return internal_connection_recv_timeout(connection, data, len, recv_bytes, timeout);
+}
+
+/**
+ * Internally used function for receiving raw data over the given connection.
+ */
+static iphone_error_t internal_connection_recv(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes)
+{
if (!connection) {
return IPHONE_E_INVALID_ARG;
}
if (connection->type == CONNECTION_USBMUXD) {
- int res = usbmuxd_recv_timeout((int)(connection->data), data, len, recv_bytes, timeout);
+ int res = usbmuxd_recv((int)(connection->data), data, len, recv_bytes);
if (res < 0) {
- debug_info("ERROR: usbmuxd_recv_timeout returned %d (%s)", res, strerror(-res));
+ debug_info("ERROR: usbmuxd_recv returned %d (%s)", res, strerror(-res));
return IPHONE_E_UNKNOWN_ERROR;
}
+
return IPHONE_E_SUCCESS;
} else {
debug_info("Unknown connection type %d", connection->type);
@@ -333,22 +406,20 @@ iphone_error_t iphone_device_recv_timeout(iphone_connection_t connection, char *
*/
iphone_error_t iphone_device_recv(iphone_connection_t connection, char *data, uint32_t len, uint32_t *recv_bytes)
{
- if (!connection) {
- return -EINVAL;
+ if (!connection || (connection->ssl_data && !connection->ssl_data->session)) {
+ return IPHONE_E_INVALID_ARG;
}
- if (connection->type == CONNECTION_USBMUXD) {
- int res = usbmuxd_recv((int)(connection->data), data, len, recv_bytes);
- if (res < 0) {
- debug_info("ERROR: usbmuxd_recv returned %d (%s)", res, strerror(-res));
- return IPHONE_E_UNKNOWN_ERROR;
+ if (connection->ssl_data) {
+ ssize_t received = gnutls_record_recv(connection->ssl_data->session, (void*)data, (size_t)len);
+ if (received > 0) {
+ *recv_bytes = received;
+ return IPHONE_E_SUCCESS;
}
-
- return IPHONE_E_SUCCESS;
- } else {
- debug_info("Unknown connection type %d", connection->type);
+ *recv_bytes = 0;
+ return IPHONE_E_SSL_ERROR;
}
- return IPHONE_E_UNKNOWN_ERROR;
+ return internal_connection_recv(connection, data, len, recv_bytes);
}
iphone_error_t iphone_device_get_handle(iphone_device_t device, uint32_t *handle)
@@ -374,3 +445,172 @@ iphone_error_t iphone_device_get_uuid(iphone_device_t device, char **uuid)
return IPHONE_E_SUCCESS;
}
+/**
+ * Internally used gnutls callback function for receiving encrypted data.
+ */
+static ssize_t internal_ssl_read(gnutls_transport_ptr_t transport, char *buffer, size_t length)
+{
+ int bytes = 0, pos_start_fill = 0;
+ size_t tbytes = 0;
+ int this_len = length;
+ iphone_error_t res;
+ iphone_connection_t connection = (iphone_connection_t)transport;
+ char *recv_buffer;
+
+ debug_info("pre-read client wants %zi bytes", length);
+
+ recv_buffer = (char *) malloc(sizeof(char) * this_len);
+
+ /* repeat until we have the full data or an error occurs */
+ do {
+ if ((res = internal_connection_recv(connection, recv_buffer, this_len, (uint32_t*)&bytes)) != IPHONE_E_SUCCESS) {
+ debug_info("ERROR: iphone_device_recv returned %d", res);
+ return res;
+ }
+ debug_info("post-read we got %i bytes", bytes);
+
+ // increase read count
+ tbytes += bytes;
+
+ // fill the buffer with what we got right now
+ memcpy(buffer + pos_start_fill, recv_buffer, bytes);
+ pos_start_fill += bytes;
+
+ if (tbytes >= length) {
+ break;
+ }
+
+ this_len = length - tbytes;
+ debug_info("re-read trying to read missing %i bytes", this_len);
+ } while (tbytes < length);
+
+ if (recv_buffer) {
+ free(recv_buffer);
+ }
+ return tbytes;
+}
+
+/**
+ * Internally used gnutls callback function for sending encrypted data.
+ */
+static ssize_t internal_ssl_write(gnutls_transport_ptr_t transport, char *buffer, size_t length)
+{
+ uint32_t bytes = 0;
+ iphone_connection_t connection = (iphone_connection_t)transport;
+ debug_info("pre-send length = %zi", length);
+ internal_connection_send(connection, buffer, length, &bytes);
+ debug_info("post-send sent %i bytes", bytes);
+ return bytes;
+}
+
+/**
+ * Internally used function for cleaning up SSL stuff.
+ */
+static void internal_ssl_cleanup(ssl_data_t ssl_data)
+{
+ if (!ssl_data)
+ return;
+
+ if (ssl_data->session) {
+ gnutls_deinit(ssl_data->session);
+ }
+ if (ssl_data->certificate) {
+ gnutls_certificate_free_credentials(ssl_data->certificate);
+ }
+}
+
+/**
+ * Enables SSL for the given connection.
+ *
+ * @param connection The connection to enable SSL for.
+ *
+ * @return IPHONE_E_SUCCESS on success, IPHONE_E_INVALID_ARG when connection
+ * is NULL or connection->ssl_data is non-NULL, or IPHONE_E_SSL_ERROR when
+ * SSL initialization, setup, or handshake fails.
+ */
+iphone_error_t iphone_connection_enable_ssl(iphone_connection_t connection)
+{
+ if (!connection || connection->ssl_data)
+ return IPHONE_E_INVALID_ARG;
+
+ iphone_error_t ret = IPHONE_E_SSL_ERROR;
+ uint32_t return_me = 0;
+
+ ssl_data_t ssl_data_loc = (ssl_data_t)malloc(sizeof(struct ssl_data_int));
+
+ // Set up GnuTLS...
+ debug_info("enabling SSL mode");
+ errno = 0;
+ gnutls_global_init();
+ gnutls_certificate_allocate_credentials(&ssl_data_loc->certificate);
+ gnutls_certificate_set_x509_trust_file(ssl_data_loc->certificate, "hostcert.pem", GNUTLS_X509_FMT_PEM);
+ gnutls_init(&ssl_data_loc->session, GNUTLS_CLIENT);
+ {
+ int protocol_priority[16] = { GNUTLS_SSL3, 0 };
+ int kx_priority[16] = { GNUTLS_KX_ANON_DH, GNUTLS_KX_RSA, 0 };
+ int cipher_priority[16] = { GNUTLS_CIPHER_AES_128_CBC, GNUTLS_CIPHER_AES_256_CBC, 0 };
+ int mac_priority[16] = { GNUTLS_MAC_SHA1, GNUTLS_MAC_MD5, 0 };
+ int comp_priority[16] = { GNUTLS_COMP_NULL, 0 };
+
+ gnutls_cipher_set_priority(ssl_data_loc->session, cipher_priority);
+ gnutls_compression_set_priority(ssl_data_loc->session, comp_priority);
+ gnutls_kx_set_priority(ssl_data_loc->session, kx_priority);
+ gnutls_protocol_set_priority(ssl_data_loc->session, protocol_priority);
+ gnutls_mac_set_priority(ssl_data_loc->session, mac_priority);
+ }
+ gnutls_credentials_set(ssl_data_loc->session, GNUTLS_CRD_CERTIFICATE, ssl_data_loc->certificate); // this part is killing me.
+
+ debug_info("GnuTLS step 1...");
+ gnutls_transport_set_ptr(ssl_data_loc->session, (gnutls_transport_ptr_t)connection);
+ debug_info("GnuTLS step 2...");
+ gnutls_transport_set_push_function(ssl_data_loc->session, (gnutls_push_func) & internal_ssl_write);
+ debug_info("GnuTLS step 3...");
+ gnutls_transport_set_pull_function(ssl_data_loc->session, (gnutls_pull_func) & internal_ssl_read);
+ debug_info("GnuTLS step 4 -- now handshaking...");
+ if (errno)
+ debug_info("WARN: errno says %s before handshake!", strerror(errno));
+ return_me = gnutls_handshake(ssl_data_loc->session);
+ debug_info("GnuTLS handshake done...");
+
+ if (return_me != GNUTLS_E_SUCCESS) {
+ internal_ssl_cleanup(ssl_data_loc);
+ free(ssl_data_loc);
+ debug_info("GnuTLS reported something wrong.");
+ gnutls_perror(return_me);
+ debug_info("oh.. errno says %s", strerror(errno));
+ } else {
+ connection->ssl_data = ssl_data_loc;
+ ret = IPHONE_E_SUCCESS;
+ debug_info("SSL mode enabled");
+ }
+ return ret;
+}
+
+/**
+ * Disable SSL for the given connection.
+ *
+ * @param connection The connection to disable SSL for.
+ *
+ * @return IPHONE_E_SUCCESS on success, IPHONE_E_INVALID_ARG when connection
+ * is NULL. This function also returns IPHONE_E_SUCCESS when SSL is not
+ * enabled and does no further error checking on cleanup.
+ */
+iphone_error_t iphone_connection_disable_ssl(iphone_connection_t connection)
+{
+ if (!connection)
+ return IPHONE_E_INVALID_ARG;
+ if (!connection->ssl_data) {
+ /* ignore if ssl is not enabled */
+ return IPHONE_E_SUCCESS;
+ }
+
+ if (connection->ssl_data->session) {
+ gnutls_bye(connection->ssl_data->session, GNUTLS_SHUT_RDWR);
+ }
+ internal_ssl_cleanup(connection->ssl_data);
+ free(connection->ssl_data);
+ connection->ssl_data = NULL;
+
+ return IPHONE_E_SUCCESS;
+}
+
diff --git a/src/iphone.h b/src/iphone.h
index 51f9c9d..2755349 100644
--- a/src/iphone.h
+++ b/src/iphone.h
@@ -30,9 +30,16 @@ enum connection_type {
CONNECTION_USBMUXD = 1
};
+struct ssl_data_int {
+ gnutls_certificate_credentials_t certificate;
+ gnutls_session_t session;
+};
+typedef struct ssl_data_int *ssl_data_t;
+
struct iphone_connection_int {
enum connection_type type;
void *data;
+ ssl_data_t ssl_data;
};
struct iphone_device_int {
@@ -41,4 +48,7 @@ struct iphone_device_int {
void *conn_data;
};
+iphone_error_t iphone_connection_enable_ssl(iphone_connection_t connection);
+iphone_error_t iphone_connection_disable_ssl(iphone_connection_t connection);
+
#endif
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