From 16434f6a731d79d6d24b4a84f39943859270855d Mon Sep 17 00:00:00 2001
From: leslie <unknown>
Date: Wed, 22 Oct 2008 22:46:10 +0800
Subject: [PATCH] NDS: add fake VIASAT support (needs flash file)

---
 systems/nds/fake-nds.c | 105 +++++++++++++++++++++++++++--------------
 1 file changed, 69 insertions(+), 36 deletions(-)

diff --git a/systems/nds/fake-nds.c b/systems/nds/fake-nds.c
index 6ae0034..130c916 100644
--- a/systems/nds/fake-nds.c
+++ b/systems/nds/fake-nds.c
@@ -29,33 +29,55 @@
 #include "nds.h"
 #include "log-nds.h"
 
-#define SYSTEM_NAME          "PW-NDS"
+#define SYSTEM_NAME          "Fake-NDS"
 #define SYSTEM_PRI           -12
 
-// -- cSystemPwNDS ---------------------------------------------------------------
+// -- cSystemFakeNDS -----------------------------------------------------------
 
-class cSystemPwNDS : public cSystem {
+class cSystemFakeNDS : public cSystem {
 private:
   cFileMap *fm;
+  bool mapMD5ok;
+  //
+  bool MapFlash(const char *name, int len, const unsigned char *appmd);
 public:
-  cSystemPwNDS(void);
-  ~cSystemPwNDS();
+  cSystemFakeNDS(void);
+  ~cSystemFakeNDS();
   virtual bool ProcessECM(const cEcmInfo *ecm, unsigned char *data);
   };
 
-cSystemPwNDS::cSystemPwNDS(void)
+cSystemFakeNDS::cSystemFakeNDS(void)
 :cSystem(SYSTEM_NAME,SYSTEM_PRI)
 {
-  fm=0;
+  fm=0; mapMD5ok=false;
   memset(cw,0,sizeof(cw));
 }
 
-cSystemPwNDS::~cSystemPwNDS()
+cSystemFakeNDS::~cSystemFakeNDS()
 {
   if(fm) fm->Unmap();
 }
 
-bool cSystemPwNDS::ProcessECM(const cEcmInfo *ecm, unsigned char *data)
+bool cSystemFakeNDS::MapFlash(const char *name, int len, const unsigned char *appmd)
+{
+  if(fm && !fm->IsFileMap(name,false)) { fm->Unmap(); fm=0; }
+  if(!fm) fm=filemaps.GetFileMap(name,FILEMAP_DOMAIN,false);
+  if(!fm) return false;
+  if(!fm->Addr()) {
+    if(!fm->Map()) return false;
+    unsigned char md[16];
+    MD5(fm->Addr(),fm->Size(),md);
+    if(fm->Size()<len || memcmp(md,appmd,16)) {
+      mapMD5ok=false;
+      if(doLog) PRINTF(L_SYS_ECM,"MD5 checksum failed on flash bin");
+      return false;
+      }
+    mapMD5ok=true;
+    }
+  return mapMD5ok;
+}
+
+bool cSystemFakeNDS::ProcessECM(const cEcmInfo *ecm, unsigned char *data)
 {
   int len=SCT_LEN(data);
   if(len<7 || data[3]!=0x00 || data[4]!=0x00 || data[5]!=0x01) {
@@ -68,50 +90,61 @@ bool cSystemPwNDS::ProcessECM(const cEcmInfo *ecm, unsigned char *data)
     return false;
     }
 
-  // check cw in IRD block
-  if(!(data[6+9]&1) || !(data[6+10]&16)) {
-    if(doLog) PRINTF(L_SYS_ECM,"no CW in IRD block");
-    return false;
+  int block1, block2, block3, block4, cwoff;
+  if(iLen==0x1C && data[6+11]==0x0F && data[6+12]==0x40) { // PW
+    // check cw in IRD block
+    if(!(data[6+9]&1) || !(data[6+10]&16)) {
+      if(doLog) PRINTF(L_SYS_ECM,"no CW in IRD block");
+      return false;
+      }
+    static const unsigned char app10039[] = { 0xff,0x25,0x38,0x51,0xec,0xcb,0xc8,0xfa,0xab,0x97,0x59,0x15,0x4d,0x14,0x05,0xfa };
+    if(!MapFlash("PR-HD1000_060000.bin",0x2603c0,app10039)) return false;
+    block1=1;
+    block2=23;
+    block3=0x22D344;
+    block4=0x25c620;
+    cwoff=14;
     }
-
-  if(!fm) fm=filemaps.GetFileMap("PR-HD1000_060000.bin",FILEMAP_DOMAIN,false);
-  if(!fm || (!fm->Addr() && !fm->Map())) return false;
-  unsigned char *m=fm->Addr();
-
-  unsigned char md[16];
-  MD5(m,fm->Size(),md);
-  const unsigned char app10039[] = { 0xff,0x25,0x38,0x51,0xec,0xcb,0xc8,0xfa,0xab,0x97,0x59,0x15,0x4d,0x14,0x05,0xfa };
-  if(fm->Size()<0x2603c0 || memcmp(md,app10039,16)) {
-    if(doLog) PRINTF(L_SYS_ECM,"MD5 checksum failed on flash bin");
+  else if(iLen==0x21 && data[6+14]==0x0F && data[6+15]==0x40) { // VIASAT
+    static const unsigned char apppace[] = { 0x23,0x21,0xc3,0xe0,0xc1,0xce,0xed,0xb4,0x4b,0xd6,0xa4,0xc7,0x44,0x61,0xda,0x0e };
+    if(!MapFlash("VIA-Pace4_060000.bin",0x2BA600,apppace)) return false;
+    block1=1;
+    block2=26;
+    block3=0x28cb08;
+    block4=0x2b5318;
+    cwoff=17;
+    }
+  else {
+    if(doLog) PRINTF(L_SYS_ECM,"failed to detect provider");
     return false;
     }
 
-  unsigned char hash[94];
-  memcpy(&hash[0],&data[6+1],10);
-  memcpy(&hash[10],&data[6+23],4);
-  memcpy(&hash[14],m+0x22D344,64);
-  memcpy(&hash[78],m+0x25c620,16);
+  unsigned char hash[94], md[16];
+  memcpy(&hash[0],&data[6+block1],10);
+  memcpy(&hash[10],&data[6+block2],4);
+  memcpy(&hash[14],fm->Addr()+block3,64);
+  memcpy(&hash[78],fm->Addr()+block4,16);
   MD5(hash,94,md);
-  xxor(cw+((data[0]&1)<<3),8,&data[6+14],&md[8]);
+  xxor(cw+((data[0]&1)<<3),8,&data[6+cwoff],&md[8]);
   return true;
 }
 
-// -- cSystemLinkPwNDS ---------------------------------------------------------
+// -- cSystemLinkFakeNDS -------------------------------------------------------
 
-class cSystemLinkPwNDS : public cSystemLink {
+class cSystemLinkFakeNDS : public cSystemLink {
 public:
-  cSystemLinkPwNDS(void);
+  cSystemLinkFakeNDS(void);
   virtual bool CanHandle(unsigned short SysId);
-  virtual cSystem *Create(void) { return new cSystemPwNDS; }
+  virtual cSystem *Create(void) { return new cSystemFakeNDS; }
   };
 
-static cSystemLinkPwNDS staticInit;
+static cSystemLinkFakeNDS staticInit;
 
-cSystemLinkPwNDS::cSystemLinkPwNDS(void)
+cSystemLinkFakeNDS::cSystemLinkFakeNDS(void)
 :cSystemLink(SYSTEM_NAME,SYSTEM_PRI)
 {}
 
-bool cSystemLinkPwNDS::CanHandle(unsigned short SysId)
+bool cSystemLinkFakeNDS::CanHandle(unsigned short SysId)
 {
   return (SysId&SYSTEM_MASK)==SYSTEM_NDS;
 }
-- 
2.39.5