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KeePass Password Safe

, 1 Oct 2014 CPOL
KeePass is a free, open-source, light-weight and easy-to-use password safe.
KeePass.zip
KeePass.chm
KeePass.exe
KeePass_Src.zip
Build
Docs
Ext
Icons
Finals
Finals2
plock-blu.ico
plock-dis.ico
plock.ico
plockb.ico
key-blu.png
key-bw.png
key-grn.ico
key-grn.png
plock-blu.ico
plock-blu.png
plock-bw.png
plock-dis.ico
plock-grn.ico
plock-grn.png
plock.ico
plock.png
plockb.png
plockbw-r.png
plockbw.png
Untitled.ico
key-org.ico
keyhole-grn.ico
lockblue.ico
lockgreen.ico
lockred.ico
lockyellow.ico
plockb.ico
plockb2.ico
plockbw.ico
plockg.ico
plocko.ico
plockr.ico
plocky.ico
Icons_Nuvola
KeePass.ini
KeePass.iss
KeePassMsi
KeePassMsi.vdproj
KeePassLibC
KeePassLibCpp
Crypto
SHA2
DataExchange
Details
IO
PasswordGenerator
SDK
Details
SysSpec_Windows
Util
KeePassAPI
KeePassLib.def
res
WinGUI
NewGUI
TaskbarListEx
TaskDialog
VistaMenu
Plugins
res
autotype.bmp
cancel.bmp
clienticex.bmp
clock.bmp
disk.bmp
document.bmp
entry_ed.ico
file.bmp
help_sma.bmp
help_smp.bmp
iconpic.ico
infoicon.bmp
infoiconex.bmp
KeePass.png
key.ico
keyhole.ico
key_smal.bmp
language.bmp
locked.ico
lock_ovr.ico
MostPopularPasswords.bin
mouse_sm.bmp
ok.bmp
optionicex.bmp
options.ico
plugins.ico
PwSafe.ico
randomke.bmp
random_b.bmp
search.ico
tb_about.bmp
tb_adden.bmp
tb_copyp.bmp
tb_copyu.bmp
tb_defau.bmp
tb_delet.bmp
tb_edite.bmp
tb_find.bmp
tb_lock.bmp
tb_new.bmp
tb_open.bmp
tb_save.bmp
tb_save1.bmp
tb_saved.bmp
toolssma.bmp
unlocked.ico
winprops.bmp
world.ico
Util
CmdLine
SprEngine
/*
 * Fast, portable, and easy-to-use Twofish implementation, 
 * Version 0.3.
 * Copyright (c) 2002 by Niels Ferguson.
 *
 * See the twofish.c file for the details of the how and why of this code.
 *
 * The author hereby grants a perpetual license to everybody to
 * use this code for any purpose as long as the copyright message is included
 * in the source code of this or any derived work.
 */


/*
 * PLATFORM FIXES
 * ==============
 *
 * The following definitions have to be fixed for each particular platform 
 * you work on. If you have a multi-platform program, you no doubt have 
 * portable definitions that you can substitute here without changing 
 * the rest of the code.
 *
 * The defaults provided here should work on most PC compilers.
 */


/* 
 * A Twofish_Byte must be an unsigned 8-bit integer.
 * It must also be the elementary data size of your C platform,
 * i.e. sizeof( Twofish_Byte ) == 1.
 */
typedef unsigned char   Twofish_Byte;

/* 
 * A Twofish_UInt32 must be an unsigned integer of at least 32 bits. 
 * 
 * This type is used only internally in the implementation, so ideally it
 * would not appear in the header file, but it is used inside the
 * Twofish_key structure which means it has to be included here.
 */
typedef unsigned int    Twofish_UInt32;


/*
 * END OF PLATFORM FIXES
 * =====================
 * 
 * You should not have to touch the rest of this file, but the code
 * in twofish.c has a few things you need to fix too.
 */


/*
 * Structure that contains a prepared Twofish key.
 * A cipher key is used in two stages. In the first stage it is converted
 * form the original form to an internal representation. 
 * This internal form is then used to encrypt and decrypt data. 
 * This structure contains the internal form. It is rather large: 4256 bytes
 * on a platform with 32-bit unsigned values.
 *
 * Treat this as an opague structure, and don't try to manipulate the
 * elements in it. I wish I could hide the inside of the structure,
 * but C doesn't allow that.
 */
typedef 
    struct 
        {
        Twofish_UInt32 s[4][256];   /* pre-computed S-boxes */
        Twofish_UInt32 K[40];       /* Round key words */
        }
    Twofish_key;


/*
 * Initialise and test the Twofish implementation. 
 * 
 * This function MUST be called before any other function in the 
 * Twofish implementation is called.
 * It only needs to be called once.
 * 
 * Apart from initialising the implementation it performs a self test.
 * If the Twofish_fatal function is not called, the code passed the test.
 * (See the twofish.c file for details on the Twofish_fatal function.)
 */
extern void Twofish_initialise();


/*
 * Convert a cipher key to the internal form used for 
 * encryption and decryption.
 * 
 * The cipher key is an array of bytes; the Twofish_Byte type is 
 * defined above to a type suitable on your platform. 
 *
 * Any key must be converted to an internal form in the Twofisk_key structure
 * before it can be used.
 * The encryption and decryption functions only work with the internal form.
 * The conversion to internal form need only be done once for each key value.
 *
 * Be sure to wipe all key storage, including the Twofish_key structure, 
 * once you are done with the key data. 
 * A simple memset( TwofishKey, 0, sizeof( TwofishKey ) ) will do just fine.
 *
 * Unlike most implementations, this one allows any key size from 0 bytes 
 * to 32 bytes. According to the Twofish specifications, 
 * irregular key sizes are handled by padding the key with zeroes at the end 
 * until the key size is 16, 24, or 32 bytes, whichever
 * comes first. Note that each key of irregular size is equivalent to exactly
 * one key of 16, 24, or 32 bytes.
 *
 * WARNING: Short keys have low entropy, and result in low security.
 * Anything less than 8 bytes is utterly insecure. For good security
 * use at least 16 bytes. I prefer to use 32-byte keys to prevent
 * any collision attacks on the key.
 *
 * The key length argument key_len must be in the proper range.
 * If key_len is not in the range 0,...,32 this routine attempts to generate 
 * a fatal error (depending on the code environment), 
 * and at best (or worst) returns without having done anything.
 *
 * Arguments:
 * key      Array of key bytes
 * key_len  Number of key bytes, must be in the range 0,1,...,32. 
 * xkey     Pointer to an Twofish_key structure that will be filled 
 *             with the internal form of the cipher key.
 */
extern void Twofish_prepare_key( 
                                Twofish_Byte key[],
                                int key_len, 
                                Twofish_key * xkey  
                                );


/*
 * Encrypt a single block of data.
 *
 * This function encrypts a single block of 16 bytes of data.
 * If you want to encrypt a larger or variable-length message, 
 * you will have to use a cipher mode, such as CBC or CTR. 
 * These are outside the scope of this implementation.
 *
 * The xkey structure is not modified by this routine, and can be
 * used for further encryption and decryption operations.
 *
 * Arguments:
 * xkey     pointer to Twofish_key, internal form of the key
 *              produces by Twofish_prepare_key()
 * p        Plaintext to be encrypted
 * c        Place to store the ciphertext
 */
extern void Twofish_encrypt( 
                            Twofish_key * xkey,
                            Twofish_Byte p[16], 
                            Twofish_Byte c[16]
                            );


/*
 * Decrypt a single block of data.
 *
 * This function decrypts a single block of 16 bytes of data.
 * If you want to decrypt a larger or variable-length message, 
 * you will have to use a cipher mode, such as CBC or CTR. 
 * These are outside the scope of this implementation.
 *
 * The xkey structure is not modified by this routine, and can be
 * used for further encryption and decryption operations.
 *
 * Arguments:
 * xkey     pointer to Twofish_key, internal form of the key
 *              produces by Twofish_prepare_key()
 * c        Ciphertext to be decrypted
 * p        Place to store the plaintext
 */
extern void Twofish_decrypt( 
                            Twofish_key * xkey,
                            Twofish_Byte c[16], 
                            Twofish_Byte p[16]
                            );

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Dominik Reichl
Software Developer
Germany Germany
Dominik started programming in Omikron Basic, a programming language for the good old Atari ST. After this, there was some short period of QBasic programming on the PC, but soon he began learning C++, which is his favorite language up to now.
 
Today, his programming experience includes C / C++ / [Visual] C++ [MFC], C#/.NET, Java, JavaScript, PHP and HTML and the basics of pure assembler.
 
He is interested in almost everything that has to do with computing, his special interests are security and data compression.
 
You can find his latest freeware, open-source projects and all articles on his homepage: http://www.dominik-reichl.de/

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