diff options
Diffstat (limited to 'nGenEx/Encrypt.cpp')
| -rw-r--r-- | nGenEx/Encrypt.cpp | 210 |
1 files changed, 105 insertions, 105 deletions
diff --git a/nGenEx/Encrypt.cpp b/nGenEx/Encrypt.cpp index 6fa79d2..c76ed27 100644 --- a/nGenEx/Encrypt.cpp +++ b/nGenEx/Encrypt.cpp @@ -1,15 +1,15 @@ /* Project nGenEx
- Destroyer Studios LLC
- Copyright © 1997-2004. All Rights Reserved.
+ Destroyer Studios LLC
+ Copyright © 1997-2004. All Rights Reserved.
- SUBSYSTEM: nGenEx.lib
- FILE: Encrypt.cpp
- AUTHOR: John DiCamillo
+ SUBSYSTEM: nGenEx.lib
+ FILE: Encrypt.cpp
+ AUTHOR: John DiCamillo
- OVERVIEW
- ========
- Simple Encryption / Decryption class
+ OVERVIEW
+ ========
+ Simple Encryption / Decryption class
*/
@@ -21,48 +21,48 @@ void Print(const char* fmt, ...);
static long k[4] = {
- 0x3B398E26,
- 0x40C29501,
- 0x614D7630,
- 0x7F59409A
+ 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;
+ 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;
+ 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;
}
// +-------------------------------------------------------------------+
@@ -70,31 +70,31 @@ static void decypher(long* v) 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(__FILE__,__LINE__) 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;
+ 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(__FILE__,__LINE__) 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;
}
// +-------------------------------------------------------------------+
@@ -102,25 +102,25 @@ Encryption::Encrypt(Text block) Text
Encryption::Decrypt(Text block)
{
- int len = block.length();
+ int len = block.length();
- if (len & 0x7) {
- Print("WARNING: attempt to decrypt odd length block (len=%d)\n", len);
- return Text();
- }
+ if (len & 0x7) {
+ Print("WARNING: attempt to decrypt odd length block (len=%d)\n", len);
+ return Text();
+ }
- BYTE* work = new(__FILE__,__LINE__) BYTE[len];
- CopyMemory(work, block.data(), len);
+ BYTE* work = new(__FILE__,__LINE__) BYTE[len];
+ CopyMemory(work, block.data(), len);
- long* v = (long*) work;
- for (int i = 0; i < len/8; i++) {
- decypher(v);
- v += 2;
- }
+ 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;
+ Text clear((const char*) work, len);
+ delete [] work;
+ return clear;
}
// +-------------------------------------------------------------------+
@@ -130,20 +130,20 @@ static const char* codes = "abcdefghijklmnop"; Text
Encryption::Encode(Text block)
{
- int len = block.length() * 2;
- char* work = new(__FILE__,__LINE__) char[len + 1];
+ int len = block.length() * 2;
+ char* work = new(__FILE__,__LINE__) 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];
- }
+ 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;
+ work[len] = 0;
- Text code(work, len);
- delete [] work;
- return code;
+ Text code(work, len);
+ delete [] work;
+ return code;
}
// +-------------------------------------------------------------------+
@@ -151,21 +151,21 @@ Encryption::Encode(Text block) Text
Encryption::Decode(Text block)
{
- int len = block.length() / 2;
- char* work = new(__FILE__,__LINE__) char[len + 1];
+ int len = block.length() / 2;
+ char* work = new(__FILE__,__LINE__) char[len + 1];
- for (int i = 0; i < len; i++) {
- char u = block[2*i];
- char l = block[2*i + 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[i] = (u - codes[0]) << 4 |
+ (l - codes[0]);
+ }
- work[len] = 0;
+ work[len] = 0;
- Text clear(work, len);
- delete [] work;
- return clear;
+ Text clear(work, len);
+ delete [] work;
+ return clear;
}
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