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-rw-r--r--src/img3.c162
1 files changed, 156 insertions, 6 deletions
diff --git a/src/img3.c b/src/img3.c
index 4daa6b6..cf2e91c 100644
--- a/src/img3.c
+++ b/src/img3.c
@@ -21,21 +21,171 @@
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include "img3.h"
#include "idevicerestore.h"
-img3_file* img3_parse_file(unsigned char* data, unsigned int size) {
+img3_file* img3_parse_file(unsigned char* data, int size) {
+ int data_offset = 0;
img3_header* header = (img3_header*) data;
- if(header->imageType != kImg3Container) {
+ if(header->signature != kImg3Container) {
error("ERROR: Invalid IMG3 file\n");
return NULL;
}
- return NULL;
+
+ img3_file* image = (img3_file*) malloc(sizeof(img3_file));
+ if(image == NULL) {
+ error("ERROR: Unable to allocate memory for IMG3 file\n");
+ return NULL;
+ }
+ memset(image, '\0', sizeof(img3_file));
+
+ image->header = (img3_header*) malloc(sizeof(img3_header));
+ if(image->header == NULL) {
+ error("ERROR: Unable to allocate memory for IMG3 header\n");
+ img3_free(image);
+ return NULL;
+ }
+ memcpy(image->header, data, sizeof(img3_header));
+ data_offset += sizeof(img3_header);
+
+ img3_element_header* current = NULL;
+ while(data_offset < size) {
+ current = (img3_element_header*) &data[data_offset];
+ switch(current->signature) {
+ case kTypeElement:
+ image->type_element = img3_parse_element(&data[data_offset]);
+ if(image->type_element == NULL) {
+ error("ERROR: Unable to parse TYPE element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed TYPE element\n");
+ break;
+
+ case kDataElement:
+ image->data_element = img3_parse_element(&data[data_offset]);
+ if(image->data_element == NULL) {
+ error("ERROR: Unable to parse DATA element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed DATA element\n");
+ break;
+
+ case kVersElement:
+ image->vers_element = img3_parse_element(&data[data_offset]);
+ if(image->vers_element == NULL) {
+ error("ERROR: Unable to parse VERS element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed VERS element\n");
+ break;
+
+ case kSepoElement:
+ image->sepo_element = img3_parse_element(&data[data_offset]);
+ if(image->sepo_element == NULL) {
+ error("ERROR: Unable to parse SEPO element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed SEPO element\n");
+ break;
+
+ case kBordElement:
+ image->bord_element = img3_parse_element(&data[data_offset]);
+ if(image->bord_element == NULL) {
+ error("ERROR: Unable to parse BORD element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed BORD element\n");
+ break;
+
+ case kKbagElement:
+ if(image->kbag1_element == NULL) {
+ image->kbag1_element = img3_parse_element(&data[data_offset]);
+ image->kbag1_element = img3_parse_element(&data[data_offset]);
+ if(image->kbag1_element == NULL) {
+ error("ERROR: Unable to parse first KBAG element\n");
+ img3_free(image);
+ return NULL;
+ }
+
+ } else {
+ image->kbag2_element = img3_parse_element(&data[data_offset]);
+ image->kbag2_element = img3_parse_element(&data[data_offset]);
+ if(image->kbag2_element == NULL) {
+ error("ERROR: Unable to parse second KBAG element\n");
+ img3_free(image);
+ return NULL;
+ }
+ }
+ debug("Parsed KBAG element\n");
+ break;
+
+ case kEcidElement:
+ image->ecid_element = img3_parse_element(&data[data_offset]);
+ if(image->ecid_element == NULL) {
+ error("ERROR: Unable to parse ECID element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed ECID element\n");
+ break;
+
+ case kShshElement:
+ image->shsh_element = img3_parse_element(&data[data_offset]);
+ if(image->shsh_element == NULL) {
+ error("ERROR: Unable to parse SHSH element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed SHSH element\n");
+ break;
+
+ case kCertElement:
+ image->cert_element = img3_parse_element(&data[data_offset]);
+ if(image->cert_element == NULL) {
+ error("ERROR: Unable to parse CERT element\n");
+ img3_free(image);
+ return NULL;
+ }
+ debug("Parsed CERT element\n");
+ break;
+
+ default:
+ error("ERROR: Unknown IMG3 element type\n");
+ img3_free(image);
+ return NULL;
+ }
+ data_offset += current->full_size;
+ }
+
+ return image;
+}
+
+img3_element* img3_parse_element(char* element) {
+ img3_element_header* element_header = (img3_element_header*) element;
+ return 1;
}
-void img3_free(img3_file* file) {
- if(file != NULL) {
- free(file);
+void img3_free(img3_file* image) {
+ if(image != NULL) {
+ if(image->header != NULL) {
+ free(image->header);
+ }
+
+ free(image);
}
}
+
+void img3_replace_signature(img3_file* image, char* signature) {
+ return;
+}
+
+char* img3_get_data(img3_file* image) {
+ return NULL;
+}