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-rw-r--r--Stars45/Encrypt.cpp168
1 files changed, 0 insertions, 168 deletions
diff --git a/Stars45/Encrypt.cpp b/Stars45/Encrypt.cpp
deleted file mode 100644
index 44d07ca..0000000
--- a/Stars45/Encrypt.cpp
+++ /dev/null
@@ -1,168 +0,0 @@
-/* Starshatter: The Open Source Project
- Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
- Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
- Copyright (c) 1997-2006, Destroyer Studios LLC.
-
- AUTHOR: John DiCamillo
-
-
- OVERVIEW
- ========
- Simple Encryption / Decryption class
-*/
-
-
-#include "Encrypt.h"
-#include "Utils.h"
-
-// +--------------------------------------------------------------------+
-
-static long k[4] = {
- 0x3B398E26,
- 0x40C29501,
- 0x614D7630,
- 0x7F59409A
-};
-
-static void encypher(long* v)
-{
- DWORD y=v[0];
- DWORD z=v[1];
- DWORD sum=0;
- DWORD delta=0x9e3779b9; // a key schedule constant
- DWORD n=32; // num iterations
-
- while (n-->0) { // basic cycle start
- sum += delta;
- y += (z<<4)+k[0] ^ z+sum ^ (z>>5)+k[1];
- z += (y<<4)+k[2] ^ y+sum ^ (y>>5)+k[3];
- }
-
- v[0]=y;
- v[1]=z;
-}
-
-static void decypher(long* v)
-{
- DWORD y=v[0];
- DWORD z=v[1];
- DWORD sum=0;
- DWORD delta=0x9e3779b9; // a key schedule constant
- DWORD n=32; // num iterations
-
- sum=delta<<5;
-
- while (n-->0) {
- z-= (y<<4)+k[2] ^ y+sum ^ (y>>5)+k[3];
- y-= (z<<4)+k[0] ^ z+sum ^ (z>>5)+k[1];
- sum-=delta;
- }
-
- v[0]=y;
- v[1]=z;
-}
-
-// +-------------------------------------------------------------------+
-
-Text
-Encryption::Encrypt(Text block)
-{
- int len = block.length();
-
- if (len < 1)
- return Text();
-
- // pad to eight byte chunks
- if (len & 0x7) {
- len /= 8;
- len *= 8;
- len += 8;
- }
-
- BYTE* work = new BYTE[len];
- ZeroMemory(work, len);
- CopyMemory(work, block.data(), block.length());
-
- long* v = (long*) work;
- for (int i = 0; i < len/8; i++) {
- encypher(v);
- v += 2;
- }
-
- Text cypher((const char*) work, len);
- delete [] work;
- return cypher;
-}
-
-// +-------------------------------------------------------------------+
-
-Text
-Encryption::Decrypt(Text block)
-{
- int len = block.length();
-
- if (len & 0x7) {
- Print("WARNING: attempt to decrypt odd length block (len=%d)\n", len);
- return Text();
- }
-
- BYTE* work = new BYTE[len];
- CopyMemory(work, block.data(), len);
-
- long* v = (long*) work;
- for (int i = 0; i < len/8; i++) {
- decypher(v);
- v += 2;
- }
-
- Text clear((const char*) work, len);
- delete [] work;
- return clear;
-}
-
-// +-------------------------------------------------------------------+
-
-static const char* codes = "abcdefghijklmnop";
-
-Text
-Encryption::Encode(Text block)
-{
- int len = block.length() * 2;
- char* work = new char[len + 1];
-
- for (int i = 0; i < block.length(); i++) {
- BYTE b = (BYTE) (block.data()[i]);
- work[2*i] = codes[b>>4 & 0xf];
- work[2*i+1] = codes[b & 0xf];
- }
-
- work[len] = 0;
-
- Text code(work, len);
- delete [] work;
- return code;
-}
-
-// +-------------------------------------------------------------------+
-
-Text
-Encryption::Decode(Text block)
-{
- int len = block.length() / 2;
- char* work = new char[len + 1];
-
- for (int i = 0; i < len; i++) {
- char u = block[2*i];
- char l = block[2*i + 1];
-
- work[i] = (u - codes[0]) << 4 |
- (l - codes[0]);
- }
-
- work[len] = 0;
-
- Text clear(work, len);
- delete [] work;
- return clear;
-}
-