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-rw-r--r--src/idevicerestore.c32
-rw-r--r--src/img3.c62
-rw-r--r--src/img3.h8
3 files changed, 63 insertions, 39 deletions
diff --git a/src/idevicerestore.c b/src/idevicerestore.c
index c799bc6..1ad62a9 100644
--- a/src/idevicerestore.c
+++ b/src/idevicerestore.c
@@ -1469,11 +1469,12 @@ int build_manifest_get_identity_count(plist_t build_manifest) {
}
int ipsw_get_component_by_path(const char* ipsw, plist_t tss, const char* component, const char* path, unsigned char** data, unsigned int* size) {
- img3_file* img3 = NULL;
unsigned int component_size = 0;
unsigned char* component_data = NULL;
unsigned char* component_blob = NULL;
char* component_name = NULL;
+ unsigned char* stitched_component = NULL;
+ unsigned int stitched_component_size = 0;
component_name = strrchr(path, '/');
if (component_name != NULL)
@@ -1501,38 +1502,17 @@ int ipsw_get_component_by_path(const char* ipsw, plist_t tss, const char* compon
}
if (component_blob != NULL) {
- /* parse current component as img3 */
- img3 = img3_parse_file(component_data, component_size);
- if (img3 == NULL) {
- error("ERROR: Unable to parse IMG3: %s\n", component_name);
- free(component_blob);
- free(component_data);
- return -1;
- }
-
- /* we no longer require the original data */
- free(component_data);
-
info("Personalizing component %s...\n", component_name);
- /* personalize the component using the blob */
- if (img3_replace_signature(img3, component_blob) < 0) {
+ if (img3_stitch_component(component_data, component_size, component_blob, 64, &stitched_component, &stitched_component_size) < 0) {
error("ERROR: Unable to replace IMG3 signature\n");
free(component_blob);
- img3_free(img3);
return -1;
}
- /* get the img3 file as data */
- if (img3_get_data(img3, &component_data, &component_size) < 0) {
- error("ERROR: Unable to reconstruct IMG3\n");
- free(component_blob);
- img3_free(img3);
- return -1;
- }
-
- /* cleanup */
- img3_free(img3);
+ free(component_data);
+ component_data = stitched_component;
+ component_size = stitched_component_size;
} else {
info("Not personalizing component %s...\n", component_name);
}
diff --git a/src/img3.c b/src/img3.c
index 1fa1c66..ed7646d 100644
--- a/src/img3.c
+++ b/src/img3.c
@@ -29,7 +29,11 @@
#include "common.h"
#include "idevicerestore.h"
-img3_file* img3_parse_file(unsigned char* data, unsigned int size) {
+static void img3_free(img3_file* image);
+static img3_element* img3_parse_element(const unsigned char* data);
+static void img3_free_element(img3_element* element);
+
+static img3_file* img3_parse_file(const unsigned char* data, unsigned int size) {
unsigned int data_offset = 0;
img3_element* element;
img3_header* header = (img3_header*) data;
@@ -196,7 +200,7 @@ img3_file* img3_parse_file(unsigned char* data, unsigned int size) {
return image;
}
-img3_element* img3_parse_element(unsigned char* data) {
+static img3_element* img3_parse_element(const unsigned char* data) {
img3_element_header* element_header = (img3_element_header*) data;
img3_element* element = (img3_element*) malloc(sizeof(img3_element));
if (element == NULL) {
@@ -218,7 +222,7 @@ img3_element* img3_parse_element(unsigned char* data) {
return element;
}
-void img3_free(img3_file* image) {
+static void img3_free(img3_file* image) {
if (image != NULL) {
if (image->header != NULL) {
free(image->header);
@@ -234,7 +238,7 @@ void img3_free(img3_file* image) {
}
}
-void img3_free_element(img3_element* element) {
+static void img3_free_element(img3_element* element) {
if (element != NULL) {
if (element->data != NULL) {
free(element->data);
@@ -245,7 +249,7 @@ void img3_free_element(img3_element* element) {
}
}
-int img3_replace_signature(img3_file* image, unsigned char* signature) {
+static int img3_replace_signature(img3_file* image, const unsigned char* signature) {
int i, oldidx;
int offset = 0;
img3_element* ecid = img3_parse_element(&signature[offset]);
@@ -350,7 +354,7 @@ int img3_replace_signature(img3_file* image, unsigned char* signature) {
return 0;
}
-int img3_get_data(img3_file* image, unsigned char** pdata, unsigned int* psize) {
+static int img3_get_data(img3_file* image, unsigned char** pdata, unsigned int* psize) {
int i;
int offset = 0;
int size = sizeof(img3_header);
@@ -397,3 +401,49 @@ int img3_get_data(img3_file* image, unsigned char** pdata, unsigned int* psize)
*psize = size;
return 0;
}
+
+int img3_stitch_component(const unsigned char* component, unsigned int component_size, const unsigned char* blob, unsigned int blob_size, unsigned char** img3_data, unsigned int *img3_size)
+{
+ img3_file *img3 = NULL;
+ unsigned char* outbuf = NULL;
+ unsigned int outsize = 0;
+
+ if (!component || component_size == 0 || !blob || blob_size == 0 || !img3_data || !img3_size) {
+ return -1;
+ }
+
+ /* parse current component as img3 */
+ img3 = img3_parse_file(component, component_size);
+ if (img3 == NULL) {
+ error("ERROR: Unable to parse IMG3 file\n");
+ return -1;
+ }
+
+ if (((img3_element_header*)blob)->full_size != blob_size) {
+ error("ERROR: the size %d embedded in the blob does not match the passed size of %d\n", ((img3_element_header*)blob)->full_size, blob_size);
+ img3_free(img3);
+ return -1;
+ }
+
+ /* personalize the component using the blob */
+ if (img3_replace_signature(img3, blob) < 0) {
+ error("ERROR: Unable to replace IMG3 signature\n");
+ img3_free(img3);
+ return -1;
+ }
+
+ /* get the img3 file as data */
+ if (img3_get_data(img3, &outbuf, &outsize) < 0) {
+ error("ERROR: Unable to reconstruct IMG3\n");
+ img3_free(img3);
+ return -1;
+ }
+
+ /* cleanup */
+ img3_free(img3);
+
+ *img3_data = outbuf;
+ *img3_size = outsize;
+
+ return 0;
+}
diff --git a/src/img3.h b/src/img3.h
index 1132162..d1119a6 100644
--- a/src/img3.h
+++ b/src/img3.h
@@ -95,13 +95,7 @@ typedef struct {
img3_element* unkn_element;*/
} img3_file;
-void img3_free(img3_file* image);
-img3_element* img3_parse_element(unsigned char* data);
-void img3_free_element(img3_element* element);
-img3_file* img3_parse_file(unsigned char* data, unsigned int size);
-int img3_get_data(img3_file* image, unsigned char** pdata, unsigned int* psize);
-int img3_replace_signature(img3_file* image, unsigned char* signature);
-
+int img3_stitch_component(const unsigned char* component, unsigned int component_size, const unsigned char* blob, unsigned int blob_size, unsigned char** img3_data, unsigned int *img3_size);
#ifdef __cplusplus
}s