From da6f8b1f89de5ca894910e51adfabaddeba46440 Mon Sep 17 00:00:00 2001
From: George Hotz <geohot@gmail.com>
Date: Mon, 10 Jan 2011 22:09:06 -0500
Subject: a little more reasonable

---
 package_finalize.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 package_finalize.c

(limited to 'package_finalize.c')

diff --git a/package_finalize.c b/package_finalize.c
new file mode 100644
index 0000000..472f887
--- /dev/null
+++ b/package_finalize.c
@@ -0,0 +1,83 @@
+// package_finalize by geohot
+// part of geohot's awesome tools for the PS3
+//  released under GPLv3, see http://gplv3.fsf.org/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "include/ps3_common.h"
+#include "include/oddkeys.h"
+#include <openssl/sha.h>
+#include <openssl/aes.h>
+
+typedef struct {
+  u32 magic;
+  u32 debugFlag;
+  u32 infoOffset;
+  u32 unknown1;
+  u32 headSize;
+  u32 itemCount;
+  u64 packageSize;
+  u64 dataOffset;
+  u64 dataSize;
+} pkg_header;
+
+int main(int argc, char* argv[]) {
+  u8* data;
+  u8 sha_key[0x40];
+  
+  if(argc < 2) {
+    printf("usage: %s my.pkg\n", argv[0]);
+    return -1;
+  }
+
+  int i;
+  FILE *f=fopen(argv[1], "rb");
+  fseek(f, 0, SEEK_END);
+  int nlen = ftell(f);
+  fseek(f, 0, SEEK_SET);
+  data = (u8*)malloc(nlen);
+  fread(data, 1, nlen, f);
+  fclose(f);
+
+  pkg_header *header = (pkg_header *)data;
+  int data_offset = get_u64(&(header->dataOffset));
+  int data_size = get_u64(&(header->dataSize));
+
+// decrypt debug
+  u8 sha_crap[0x40];
+  memset(sha_crap, 0, 0x40);
+  memcpy(sha_crap, &data[0x60], 8);
+  memcpy(sha_crap+0x8, &data[0x60], 8);
+  memcpy(sha_crap+0x10, &data[0x68], 8);
+  memcpy(sha_crap+0x18, &data[0x68], 8);
+
+  int dptr;
+  for(dptr = data_offset; dptr < (data_offset+data_size); dptr+=0x10) {
+    u8 hash[0x14];
+    SHA1(sha_crap, 0x40, hash);
+    for(i=0;i<0x10;i++) data[dptr+i] ^= hash[i];
+    set_u64(sha_crap+0x38, get_u64(sha_crap+0x38)+1);
+  }
+
+// recrypt retail
+  u8 pkg_key[0x10];
+  memcpy(pkg_key, &data[0x70], 0x10);
+
+  AES_KEY aes_key;
+  AES_set_encrypt_key(retail_pkg_aes_key, 128, &aes_key);
+
+  int num=0; u8 ecount_buf[0x10]; memset(ecount_buf, 0, 0x10);
+  AES_ctr128_encrypt(&data[data_offset], &data[data_offset], data_size, &aes_key, pkg_key, ecount_buf, &num);
+
+// write back
+  FILE *g = fopen(argv[1], "wb");
+  data[4] = 0x80;   // set finalize flag
+  memset(&data[(data_offset+data_size)], 0, 0x60);
+
+  // add hash
+  SHA1(data, nlen-0x20, &data[nlen-0x20]);
+  fwrite(data, 1, nlen, g);
+  fclose(g);
+}
-- 
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