From: leslie <unknown>
Date: Mon, 22 Sep 2008 13:29:22 +0000 (+0800)
Subject: nagra: update map code (from emunation)
X-Git-Tag: 0.9.1~22
X-Git-Url: http://www.vanbest.org/gitweb/?a=commitdiff_plain;h=4066d0c7407e64b9cdb7fa7a8062c81330036d50;p=sasc-ng.git

nagra: update map code (from emunation)
---

diff --git a/systems/nagra/nagra2-0101.c b/systems/nagra/nagra2-0101.c
index 7587dfc..79dd007 100644
--- a/systems/nagra/nagra2-0101.c
+++ b/systems/nagra/nagra2-0101.c
@@ -204,12 +204,8 @@ bool cMap0101::Map(int f, unsigned char *data, int l)
   l=GetOpSize(l);
   switch(f) {
     case 0x21:
-      AddMapCycles(288);
-      WS_START(1);
-      MakeJ0(J,D,C);
-      AddMapCycles(282);
-      BN_clear(C);
-      WS_END();
+      AddMapCycles(169-6);
+      IMakeJ();
       cycles=898;
       break;
     case 0x22:
@@ -225,6 +221,18 @@ bool cMap0101::Map(int f, unsigned char *data, int l)
         cycles=1086 + j - ((j-2)%5) + 16923*val.quot - ((4*val.quot-2)%5);
         }
       break;
+    case 0x23:
+      AddMapCycles(169);
+      IMonInit0();
+      break;
+    case 0x25:
+      AddMapCycles(254);
+      MakeJ0(B,D,C,wordsize<<6);
+      // valid for wordsize 1 and 2
+      AddMapCycles(795*wordsize-492);
+      BN_zero(C);
+      cycles=49+800*wordsize;
+      break;
     case 0x29:
       {
       BN_add(B,B,C);
@@ -263,10 +271,11 @@ bool cMap0101::Map(int f, unsigned char *data, int l)
         }
       BN_zero(J);
       break;
+    case 0x36:
     case 0x38:
-      AddMapCycles(232);
-      MonMul0(B,B,B,C,D,J,wordsize);
-      AddMapCycles(90);
+      AddMapCycles(230);
+      MonMul0(B,f==0x36?A:B,B,C,D,J,wordsize);
+      AddMapCycles(102);
       MonFin(B,D);
       break;
     case 0x3b:
@@ -280,29 +289,15 @@ bool cMap0101::Map(int f, unsigned char *data, int l)
       if(l>wordsize) l=wordsize;
       cBN scalar;
       scalar.GetLE(data,l<<3);
+      AddMapCycles(441);
       if(BN_is_zero(scalar) || BN_num_bits(D)<=1) {
-        MakeJ0(J,D);
+        IMakeJ();
         if(BN_num_bits(D)==1 || !BN_is_zero(scalar)) BN_zero(B);
         else BN_one(B);
         BN_one(A);
         }
       else {
-        WS_START(1);
-        MakeJ0(J,D,C);
-        AddMapCycles(860);
-        BN_zero(C);
-        WS_END();
-        if(!BN_is_zero(D)) {
-          BN_zero(I);
-          BN_set_bit(I,68*wordsize);
-          BN_mod(B,I,D,ctx);
-          }
-        AddMapCycles(1390);
-        MonMul0(B,B,B,C,D,J,wordsize);
-        AddMapCycles(100);
-        MonFin(B,D);
-        for(int i=1; i<4; i++) MonMul(B,B,B);
-//        MonInit();
+        IMonInit();
         MonMul(B,A,B);
         MonExp(scalar);
         }
@@ -666,8 +661,11 @@ bool cN2Prov0101::ProcessMap(int f)
       DoMap(f,tmp,l);
       break;
     case 0x21:
+    case 0x23:
+    case 0x25:
     case 0x30:
     case 0x31:
+    case 0x36:
     case 0x38:
     case 0x3a:
     case 0x43:
diff --git a/systems/nagra/nagra2.c b/systems/nagra/nagra2.c
index 7094559..2f01cb6 100644
--- a/systems/nagra/nagra2.c
+++ b/systems/nagra/nagra2.c
@@ -524,6 +524,48 @@ cMapCore::cMapCore(void)
   interruptible=false;
 }
 
+void cMapCore::IMakeJ(void)
+{
+  AddMapCycles(19);
+  WS_START(1);
+  AddMapCycles(102);
+  MakeJ0(J,D,C);
+  AddMapCycles(303);
+  BN_zero(C);
+  AddMapCycles(34);
+  WS_END();
+  AddMapCycles(10);
+}
+
+void cMapCore::IMonInit0(void)
+{
+  AddMapCycles(132+(wordsize*8+3)/5*5);
+  if(BN_num_bits(D)>1) AddMapCycles(54);
+  if(!BN_is_zero(D)) {
+    AddMapCycles(54);
+    BN_zero(I);
+    BN_set_bit(I,68*wordsize);
+    BN_zero(B);
+    AddMapCycles(141+(wordsize*8+3)/5*5);
+    BN_set_bit(B,64*(wordsize-1));
+    AddMapCycles(92+72*wordsize);
+    BN_mod(B,I,D,ctx);
+    AddMapCycles(639);
+    }
+  AddMapCycles(52);
+  for(int i=0; i<4; i++) {
+    MonMul0(B,B,B,C,D,J,0);
+    AddMapCycles(96+6*(i>0));
+    MonFin(B,D);
+    }
+}
+
+void cMapCore::IMonInit(void)
+{
+  IMakeJ();
+  IMonInit0();
+}
+
 void cMapCore::MonInit(int bits)
 {
   // Calculate J0 & H montgomery elements in J and B
@@ -799,34 +841,15 @@ bool cMapCore::MapGeneric(int f, unsigned char *data, int l)
       last=3; C.Set(D,l1); cycles=462+(8*l1+3)/5*5-6; break;
 
     case 0x39:
-      WS_START(1);
-      MakeJ0(J,D,C);
-      AddMapCycles(860);
-      BN_zero(C);
-      WS_END();
-      if(!BN_is_zero(D)) {
-        BN_zero(I);
-        BN_set_bit(I,68*wordsize);
-        BN_mod(B,I,D,ctx);
-        }
-      AddMapCycles(1370);
-      for(int i=0; i<4; i++) MonMul(B,B,B);
-//        MonInit();
-      I.GetLE(data,wordsize<<3);
-      MonMul(B,I,B);
-      MonMul(B,A,B);
-      break;
     case 0x3a:
-      MakeJ0(J,D);
-      if(!BN_is_zero(D)) {
-        BN_zero(I);
-        BN_set_bit(I,68*wordsize);
-        BN_mod(B,I,D,ctx);
+      AddMapCycles(f==0x39?433:192);
+      IMonInit();
+      if(f==0x39) {
+        I.GetLE(data,wordsize<<3);
+        MonMul(B,I,B);
         }
-      AddMapCycles(2000);
-      for(int i=0; i<4; i++) MonMul(B,B,B);
-//        MonInit();
-      MonMul(B,A,B);
+      else
+        MonMul(B,A,B);
       MonMul(B,A,B);
       break;
     case 0x43: // init SHA1
diff --git a/systems/nagra/nagra2.h b/systems/nagra/nagra2.h
index 5facdfe..e4fedba 100644
--- a/systems/nagra/nagra2.h
+++ b/systems/nagra/nagra2.h
@@ -156,6 +156,10 @@ protected:
   void MonInit(int bits=0);
   void MonExp(BIGNUM *scalar);
   void MonExpNeg(void);
+  // statefull, interruptible
+  void IMakeJ(void);
+  void IMonInit0(void);
+  void IMonInit(void);
   // ECC
   void DoubleP(int temp);
   void AddP(int temp);