Added Xor cypher, added decode

FSHa.asm

@@ -19,18 +19,13 @@ Setup:
 
  CALL printmotd
 
- ld hl, teststr
- ld de, testkey
- call xorcrypt
- call _PutS
-
 Input:
  ;;   TODO: Update status bar sometimes
  LD   A, $00
  CALL commandfill
 
  LD   HL, PS1
- ;CALL printprompt 
+ CALL printprompt 
 
  LD   HL, FshCmd
  LD   DE, FshCmdInptSize
@@ -80,7 +75,4 @@ FshFlags: .DB %00000000
 #include "includes/man-db.asm"
 #include "includes/Command.asm"
 
-teststr: .db "BADww", 0
-testkey: .db "OT", 0
-
 .end

includes/CryptoCommands/CryptoCommand.asm

@@ -15,6 +15,9 @@ cryptocmdmanroute:
   subroutestrjp(cryptocmdENCRYPT, cryptocmdROT, cryptocmdROTm)
   subroutestrjp(cryptocmdDECRYPT, cryptocmdunROT, cryptocmdunROTm)
   
+  subroutestrjp(cryptocmdENCRYPT, cryptocmdXOR, cryptocmdXORm)
+  subroutestrjp(cryptocmdDECRYPT, cryptocmdunXOR, cryptocmdunXORm)
+  
   subroutestrjp(cryptocmdENCRYPT, cryptocmdHELP, cryptocmdHELPm)
   subroutestrjp(cryptocmdDECRYPT, cryptocmdHELP, cryptocmdHELPm)
   
@@ -30,6 +33,9 @@ cryptocmdmanrouteu:
   subrouteustrjp(cryptocmdENCRYPT, cryptocmdROT, cryptocmdROTu)
   subrouteustrjp(cryptocmdDECRYPT, cryptocmdunROT, cryptocmdunROTu)
 
+  subrouteustrjp(cryptocmdENCRYPT, cryptocmdXOR, cryptocmdXORu)
+  subrouteustrjp(cryptocmdDECRYPT, cryptocmdunXOR, cryptocmdunXORu)
+  
   subrouteustrjp(cryptocmdENCRYPT, cryptocmdHELP, cryptocmdHELPu)
   subrouteustrjp(cryptocmdDECRYPT, cryptocmdHELP, cryptocmdHELPu)
   

includes/CryptoCommands/CryptoCommands.inc

@@ -1,7 +1,9 @@
 #include "includes/CryptoCommands/ENCRYPT.asm"
 #include "includes/CryptoCommands/ROT.asm"
+#include "includes/CryptoCommands/XOR.asm"
 
 #include "includes/CryptoCommands/HELP.asm"
 
 #include "includes/CryptoCommands/DECRYPT.asm"
 #include "includes/CryptoCommands/unROT.asm"
+#include "includes/CryptoCommands/unXOR.asm"

includes/CryptoCommands/DECRYPT.asm

@@ -29,6 +29,7 @@ cryptocmdDECRYPTfExe:
 #endmacro
 
  cryptocmdDECRYPTcmpjp(cryptocmdunROT, cryptocmdunROTf)
+ cryptocmdDECRYPTcmpjp(cryptocmdunXOR, cryptocmdunXORf)
  cryptocmdDECRYPTcmpjp(cryptocmdHELP, cryptocmdHELPf)
  
  ld hl, FshCmdArg0

includes/CryptoCommands/ENCRYPT.asm

@@ -29,6 +29,7 @@ cryptocmdENCRYPTfExe:
 #endmacro
 
  cryptocmdENCRYPTcmpjp(cryptocmdROT, cryptocmdROTf)
+ cryptocmdENCRYPTcmpjp(cryptocmdXOR, cryptocmdXORf)
  cryptocmdENCRYPTcmpjp(cryptocmdHELP, cryptocmdHELPf)
  
  ld hl, FshCmdArg0

includes/CryptoCommands/XOR.asm

@@ -0,0 +1,67 @@
+cryptocmdXOR:  .db "XOR", 0
+cryptocmdXORm: .db "XOR: Cypher, and encodes a string", 0
+cryptocmdXORu: .db "ENCRYPT XOR <Key> <Message>", 0
+cryptocmdXORf:
+cryptocmdXORfArg1: 
+ ld hl, FshCmdArgFlags
+ bit 2, (hl)
+ jr z, cryptocmdXORfArg1Get
+ bit 3, (hl)
+ jr z, cryptocmdXORfArg2
+ ld hl, ErrUsageo
+ call ErrSet
+ call ErrCatch
+cryptocmdXORfArg1Get:
+ ld hl, cryptocmdXORfDKey
+ call printprompt
+ ld hl, FshCmdArg1
+ ld de, FshCmdCmdSize
+ call inputstr
+ call _NewLine
+cryptocmdXORfArg2:
+ ld hl, FshCmdArg2
+ ld de, FshScratch
+ call strcpy
+ ld hl, FshCmdArgFlags
+ bit 4, (hl)
+ jr z, cryptocmdXORfArg2Get
+ bit 5, (hl)
+ jr z, cryptocmdXORfExe
+ ld hl, ErrUsageo
+ call ErrSet
+ call ErrCatch
+cryptocmdXORfArg2Get:
+ ld hl, cryptocmdXORfDMessage
+ call printprompt
+ ld hl, FshScratch
+ ld de, FshScratchSize - 4
+ call inputcharstr
+ call _NewLine
+cryptocmdXORfExe:
+ ld hl, FshScratch
+ ld de, FshCmdArg1
+ call xorcrypt
+ ld hl, cryptocmdXORfDResult
+ call _PutS
+ ld hl, FshScratch
+cryptocmdXORfPrint:
+ ld a, (hl)
+ or a, a
+ jr z, cryptocmdXORfPrintEnd
+ push hl
+  call bytetohexstr
+  ld a, (hl)
+  call _PutC
+  inc hl
+  ld a, (hl)
+  call _PutC
+ pop hl
+ inc hl
+ jr cryptocmdXORfPrint
+cryptocmdXORfPrintEnd:
+ call _NewLine
+ jp Fin
+
+cryptocmdXORfDKey: .db "Key= ", 0
+cryptocmdXORfDMessage: .db "Message= ", 0
+cryptocmdXORfDResult: .db "Result: ", 0

includes/CryptoCommands/unXOR.asm

@@ -0,0 +1,73 @@
+cryptocmdunXOR:  .db "XOR", 0
+cryptocmdunXORm: .db "XOR: Cypher, and decodes a string", 0
+cryptocmdunXORu: .db "DECRYPT XOR", 0
+cryptocmdunXORf:
+cryptocmdunXORfArg1: 
+ ld hl, FshCmdArgFlags
+ bit 2, (hl)
+ jr z, cryptocmdunXORfArg1Get
+ bit 3, (hl)
+ jr z, cryptocmdunXORfArg2
+ ld hl, ErrUsageo
+ call ErrSet
+ call ErrCatch
+cryptocmdunXORfArg1Get:
+ ld hl, cryptocmdunXORfDKey
+ call printprompt
+ ld hl, FshCmdArg1
+ ld de, FshCmdCmdSize
+ call inputstr
+ call _NewLine
+cryptocmdunXORfArg2:
+ ld hl, FshCmdArg2
+ ld de, FshScratch
+ call strcpy
+ ld hl, FshCmdArgFlags
+ bit 4, (hl)
+ jr nz, cryptocmdunXORfExe
+cryptocmdunXORfArg2Get:
+ ld hl, cryptocmdunXORfStringPBuffer
+ ld b, $0F
+ ld a, $00
+ call memset
+ ld hl, cryptocmdunXORfDMessage
+ call printprompt
+ ld hl, FshScratch
+ ld de, FshScratchSize - 4
+ call inputstr
+ ld bc, cryptocmdunXORfStringPBuffer
+cryptocmdunXORfArg2GetLoop:
+ ld a, (hl)
+ or a, a
+ jr z, cryptocmdunXORfArg2GetLoopEnd
+ ld (cryptocmdunXORfStringBuffer), a
+ inc hl
+ ld a, (hl)
+ ld (cryptocmdunXORfStringBuffer + 1), a
+ push hl
+  ld hl, cryptocmdunXORfStringBuffer
+  call hexToA
+ pop hl
+ ld (bc), a
+ inc hl
+ inc bc
+ jr cryptocmdunXORfArg2GetLoop
+cryptocmdunXORfArg2GetLoopEnd:
+ 
+ call _NewLine
+cryptocmdunXORfExe:
+ ld hl, cryptocmdunXORfStringPBuffer
+ ld de, FshCmdArg1
+ call xorcrypt
+ ld hl, cryptocmdunXORfDResult
+ call _PutS
+ ld hl, cryptocmdunXORfStringPBuffer
+ call _PutS
+ call _NewLine
+ jp Fin
+
+cryptocmdunXORfDKey: .db "Key= ", 0
+cryptocmdunXORfDMessage: .db "CypherText= ", 0
+cryptocmdunXORfDResult: .db "Result: ", 0
+cryptocmdunXORfStringBuffer: .db $00, $00, $00, $00
+cryptocmdunXORfStringPBuffer: .db $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00

includes/lib/crypto/Xor.asm

@@ -8,45 +8,80 @@
 xorcrypt:
  push hl
   push de
-   call strlen
-   push hl
-    ld hl, 0
-    ld h, b
-    ld l, c
-    ex de, hl
-     call strlen
-    ex de, hl
-    ld a, l ;BC = len(seed) hl=len(string)
-    sub c
-    jr nc, xorcryptSmaller
-    ld a, 0
-xorcryptSmaller:
-    ld bc, 0
-    ld b, a
-    ld c, l ;b=len(seed) c=len(string)
-   pop hl
-   or a, a
-   jr z, strxorPadLoopEnd
-   ex de, hl; hl=seed
    push bc
-    ld c, 0
-    add hl, bc
-   pop bc
-   inc b
-   ld (hl), %10000000
-   push bc
-strxorPadLoop:
+    call strlen
+    push de
+	 push hl
+      ld hl, 0
+      ld h, b
+      ld l, c
+      ex de, hl
+       call strlen
+      ex de, hl
+      ld a, l ;C = len(seed) l=len(string)
+      sub a,c
+      jp nc, xorcryptNSmaller
+      ld c, $01
+	  ld a, 0
+	  ld l, 0
+xorcryptNSmaller:
+	  dec c
+	  jp nc, xorcryptNSmaller2
+	  ld c, 0
+xorcryptNSmaller2:
+      ld b, c
+      ld c, l ;b=len(seed) c=len(string)
+     pop hl
+     or a, a
+	pop de 
+     jr z, xorcryptEnd
+	push de
+     ex de, hl; hl=seed
+    pop hl
+    push bc
+     push de
+      ld de, 0
+	  ld e, b
+	  ld bc, 0
+	  ld c, e
+      add hl, bc
+     pop de
+    pop bc
+    inc hl
+    ld (hl), %10000000
+    push bc
+     dec b
+	 ld a, $FF
+	 cp a, b
+	 jr z, xorcryptPadLoopEnd
+	 ld a, $00
+	 cp a, b
+	 jr nz, xorcryptPadLoop
+	 inc b
+xorcryptPadLoop:
+     inc hl
+     ld (hl), $11
+     djnz xorcryptPadLoop
+xorcryptPadLoopEnd:
+    pop bc
+    ld (hl), b
     inc hl
     ld (hl), $00
-    djnz strxorPadLoop
-	pop bc
-strxorPadLoopEnd:
-   dec hl
-   ld (hl), b
-   inc hl
-   ld (hl), $00
+xorcryptEnd:
+   pop bc
   pop de
  pop hl
+ ;push hl
+;xorcryptRandLoop:
+  ;ld a, (hl)
+  ;or a, a
+  ;jr z, xorcryptRandLoopEnd
+  ;call randomint
+  ;ld (hl), a
+  ;inc hl
+  ;jr xorcryptRandLoop
+;xorcryptRandLoopEnd:
+ ;pop hl
  call strxor
  ret
  

includes/lib/std/Hex.asm

@@ -0,0 +1,83 @@
+;;bytetohexstr
+;;converts byte to hex string
+;;Inputs:
+;; A: input byte
+;;Outputs:
+;; hl: output string location
+bytetohexstr:
+ push hl
+  push bc
+   ld bc, 0
+   ld c, a
+   ld b, $0F
+   and a, b
+   ld b, a
+   ld a, c
+   ld c, b
+   ld b, 0
+   ld hl, hexLUT
+   add hl, bc
+   ld b, (hl)
+   ld hl, bytetohexstrBuf + 1
+   ld (hl), b
+  pop bc
+  push bc
+   ld bc, 0
+   srl a
+   srl a
+   srl a
+   srl a
+   ld b, a
+   ld a, c
+   ld c, b
+   ld b, 0
+   ld hl, hexLUT
+   add hl, bc
+   ld b, (hl)
+   ld hl, bytetohexstrBuf
+   ld (hl), b
+  pop bc
+  ld hl, bytetohexstrBuf + 2
+  ld (hl), $00
+ pop hl
+ ld hl, bytetohexstrBuf
+ ret
+ 
+bytetohexstrBuf: .db $00, $00, $00, $00
+
+#include "includes/tables/hexLUT.asm"
+
+;;hexToA
+;;Converts a hexadecimal string to a number.
+;;Inputs:
+;; HL: String pointer
+;;Outputs:
+;; A: Value
+hexToA:
+ push bc
+  push hl
+   ld b, 0
+_: ld a, (hl)
+   or a
+   jr z, hexToA_ret
+   rl b \ rl b \ rl b \ rl b
+   call hexToA_doConvert
+   or b
+   ld b, a
+   inc hl
+   jr -_
+hexToA_ret:
+   ld a, b
+  pop hl
+ pop bc
+ ret
+
+hexToA_doConvert:
+ cp 'a' ; Convert to lowercase
+ jr c, _
+ sub 'a' - 'A'
+_: cp 'A' ; Close gap between numbers and letter
+ jr c, _
+ sub 'A'-('9'+1)
+_: sub '0' ; To number
+ ret

includes/lib/std/String.asm

@@ -266,9 +266,9 @@ strtowExit:
 ;;Outputs:
 ;; HL: Xor String Pointer
 strxor:
- push de
-  push hl
-  ex de, hl
+ push hl
+  push de
+   ex de, hl
 strxorLoop:
    ld a, (de)
    or a, a
@@ -279,8 +279,8 @@ strxorLoop:
    inc hl
    jr strxorLoop
 strxorEnd:
-  pop hl
- pop de
+  pop de
+ pop hl
  ret
  
  

includes/lib/std/std.inc

@@ -7,6 +7,7 @@
 #include "includes/lib/std/Print.asm"
 #include "includes/lib/std/Draw.asm"
 #include "includes/lib/std/Array.asm"
+#include "includes/lib/std/Hex.asm"
 
 #include "includes/lib/std/String.asm"
 

includes/tables/hexLUT.asm

@@ -0,0 +1 @@
+hexLUT: .db "0123456789ABCDEF", 0