From 3c487c5cd69c53d6fea948643c0a76df03516605 Mon Sep 17 00:00:00 2001 From: Aki Date: Fri, 1 Apr 2022 21:23:39 +0200 Subject: Moved Stars45 to StarsEx --- Stars45/Encrypt.cpp | 168 ---------------------------------------------------- 1 file changed, 168 deletions(-) delete mode 100644 Stars45/Encrypt.cpp (limited to 'Stars45/Encrypt.cpp') 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; -} - -- cgit v1.1