加密信息
BlowFish算法用来加密64Bit长度的字符串。
BlowFish算法使用两个“盒”——ungignedlongpbox[18]和unsignedlongsbox[4,256]。
BlowFish算法中,有一个核心加密函数:BF_En(后文详细介绍)。该函数输入64位信息,运算后,以64位密文的形式输出。用BlowFish算法加密信息,需要两个过程:
1.密钥预处理
2.信息加密
分别说明如下:
密钥预处理:
BlowFish算法的源密钥——pbox和sbox是固定的。我们要加密一个信息,需要自己选择一个key,用这个key对pbox和sbox进行变换,得到下一步信息加密所要用的key_pbox和key_sbox。具体的变化算法如下:
1)用sbox填充key_sbox
2)用自己选择的key8个一组地去异或pbox,用异或的结果填充key_pbox。key可以循环使用。
比如说:选的key是"abcdefghijklmn"。则异或过程为:
key_pbox[0]=pbox[0]^abcdefgh
key_pbox[1]=pbox[1]^ijklmnab
…………
…………
如此循环,直到key_box填充完毕。
3)用BF_En加密一个全0的64位信息,用输出的结果替换key_pbox[0]和key_pbox[1]。i=0
4)用BF_En加密替换后的key_pbox,key_pbox[i+1],用输出替代key_pbox[i+2]和key_pbox[i+3]
5)i+2,继续第4步,直到key_pbox全部被替换
6)用key_pbox[16]和key_pbox[17]做首次输入(相当于上面的全0的输入),用类似的方法,替换key_sbox信息加密。信息加密就是用函数把待加密信息x分成32位的两部分:xL,xRBF_En对输入信息进行变换,BF_En函数详细过程如下:
对于i=1至16
xL=xL^Pi
xR=F(xL)^xR
交换xL和xR(最后一轮取消该运算)
blowfish算法
xR=xR^P17
xL=xL^P18
重新合并xL和xR
函数F见下图:
8位32位
|-----------S盒1-----------
||加
|8位32位|----
|-----------S盒2-----------|
||
||异或----
32位-|||
|8位32位||
|-----------S盒3---------------|加
||-----------------32位
||
||
|8位32位|
|-----------S盒4-----------------------
把xL分成4个8位分组:a,b,c和d
输出为:F(xL)=((((S[1,a]+S[2,b])MOD4294967296)^s[3,c])+S[4,d])MOD4294967296
(2的32次方)(2的32次方)
重新合并后输出的结果就是我们需要的密文。
用BlowFish算法解密,同样也需要两个过程。
1.密钥预处理
2.信息解密
密钥预处理的过程与加密时完全相同
信息解密的过程就是把信息加密过程的key_pbox逆序使用即可。
可以看出,选择不同的key,用BlowFish算法加密同样的信息,可以得出不同的结果。
要破解BlowFish算法,就是要得到BlowFish算法的key。所以,使用BlowFish算法进行加密,最重要的也就是key的选择以及key的保密。其中key的选择可以使用bf_sdk中的_WeakKey函数进行检验。以下是该函数的说明:
源文:
---------------------------------------------------------------------------------------
_WeakKey
Function:TestifthegeneratedBoxesareweak
Argument:none
Return:AX=Status(1=weak,0=good)
Affects:AX,BX,CX,DX,SI,DI,directionFlag
Description:After"_InitCrypt"youshouldtesttheBoxeswiththisfunction.
Iftheyprovideaweaknesswhichacryptoanalystcoulduseto
breaktheciphera"1"isreturned.Inthiscaseyoushould
reloadtheoriginalboxesandlettheuserchooseadifferent
password.
---------------------------------------------------------------------------------------
译文:
---------------------------------------------------------------------------------------
_WeakKey
功能:测试产生的box是否安全
参数:无
返回:AX=1不安全;AX=0安全
影响:AX,BX,CX,DX,SI,DI,方向标志
描述:使用"_InitCrypt"函数产生用于加密的Boxes后,你应该用这个函数测试产生的Boxes是否安全,如果该key产生的Boxes不安全——可以被密码分析者通过分析Boxes得到key,那么,你应该采用另外一个key产生一个安全的Boxes用来加密。
BlowFish's 分析
由于该CrackMe主要是测试你的密码学知识,所以没有在其他方面设关卡。为了减小文件体积,缩短大家下载的时间,用upx加了壳,直接用Trw2000的"PNewSec+Makepe"很方便地就能脱掉壳。
用常规的方法,很快找到下面关键比较处:
:004015D951pushecx
:004015DA52pushedx
:004015DB6880894000push00408980
:004015E0E8EBFAFFFFcall004010D0//BF_De(sn)
:004015E58B442464moveax,dwordptr[esp+64]
:004015E98B0DF0994000movecx,dwordptr[004099F0]
:004015EF83C41Caddesp,0000001C
:004015F23BC1cmpeax,ecx//比较
:004015F47529jne0040161F
:004015F68B4C244Cmovecx,dwordptr[esp+4C]
:004015FAA1EC994000moveax,dwordptr[004099EC]
:004015FF3BC8cmpecx,eax//比较
:00401601751Cjne0040161F
:004016036A30push00000030
由于BlowFish算法加密,解密输出的信息都是64Bit的,所以要进行两次比较。
我们既然知道了他对我们的sn进行的变换是BF_De,那么,很显然,我们要找到程序初始化key_pbox和key_sbox的地方。跟进4015E0的Call,找到key_pbox在408980处,下bpm,然后跟踪,分析,找到程序初始化key_pbox和key_sbox的地方,如下:
:004016C050pusheax
*PossibleStringDataReffromDataObj->"CrackingForFun"
|
:004016C16844804000push00408044
:004016C66880894000push00408980
:004016CBE860FAFFFFcall00401130//初始化Boxes
由此我们知道了BF_De(sn)的key是"CrackingForFun"。
问题的一半已经解决了。下面我们来看用来比较的另外的64Bit的数是从何而来。
bpm4099ECw
跟踪分析后,发现这个用来比较的数是由BF_En(ComputerID,key="ChinaCrackingGroup")生成。
至此,我们可以写出注册机的算法:
sn=BF_En((BF_En(ComputerID,key="ChinaCrackingGroup"),key="CrackingForFun")
只要你编程够强,密码学也还过得去,写出这个东西的注册机就不是困难的事情了。
附:
ComputerID的产生
如果你对这个CrackMe很有兴趣,还想研究一下他的ComputerID是如何产生的,也可以继续跟踪,分析,在这里,我给处我分析的结果:
ComputerID=BF_En(0776f6c62h,068736966h,key=PW_1)
其中,PW_1就是你的Windows版本号,可以在“系统属性”里头看到,也就是注册表中的
H_L_M\Software\Microsoft\Windows\CurrentVersion中的ProductId项。在我的机器上是:
"25001-OEM-0080247-46673"
注册机源码里头有一些语句没有派上用场,用“;”屏蔽了,如果你有兴趣,可以把前面的;号去掉然后把.data段里头的PW_1换成你机器的ComputerID,再按照程序中的说明自己修改一下源程序,用Masm32V6重新编译,直接按Generate,也能得到正确的序列号。
代码:
- ////////////////////////////////////////////////////////////////////////////
- ///
- // Blowfish.h Header File
- //
- // BLOWFISH ENCRYPTION ALGORITHM
- //
- // Encryption and Decryption of Byte Strings using the Blowfish Encryption Algorithm.
- // Blowfish is a block cipher that encrypts data in 8-byte blocks. The algorithm consists
- // of two parts: a key-expansion part and a data-ancryption part. Key expansion converts a
- // variable key of at least 1 and at most 56 bytes into several subkey arrays totaling
- // 4168 bytes. Blowfish has 16 rounds. Each round consists of a key-dependent permutation,
- // and a key and data-dependent substitution. All operations are XORs and additions on 32-bit words.
- // The only additional operations are four indexed array data lookups per round.
- // Blowfish uses a large number of subkeys. These keys must be precomputed before any data
- // encryption or decryption. The P-array consists of 18 32-bit subkeys: P0, P1,...,P17.
- // There are also four 32-bit S-boxes with 256 entries each: S0,0, S0,1,...,S0,255;
- // S1,0, S1,1,...,S1,255; S2,0, S2,1,...,S2,255; S3,0, S3,1,...,S3,255;
- //
- // The Electronic Code Book (ECB), Cipher Block Chaining (CBC) and Cipher Feedback modes
- // are used:
- //
- // In ECB mode if the same block is encrypted twice with the same key, the resulting
- // ciphertext blocks are the same.
- //
- // In CBC Mode a ciphertext block is obtained by first xoring the
- // plaintext block with the previous ciphertext block, and encrypting the resulting value.
- //
- // In CFB mode a ciphertext block is obtained by encrypting the previous ciphertext block
- // and xoring the resulting value with the plaintext
- //
- // The previous ciphertext block is usually stored in an Initialization Vector (IV).
- // An Initialization Vector of zero is commonly used for the first block, though other
- // arrangements are also in use.
- /*
- http://www.counterpane.com/vectors.txt
- Test vectors by Eric Young. These tests all assume Blowfish with 16
- rounds.
- All data is shown as a hex string with 012345 loading as
- data[0]=0x01;
- data[1]=0x23;
- data[2]=0x45;
- ecb test data (taken from the DES validation tests)
- key bytes clear bytes cipher bytes
- 0000000000000000 0000000000000000 4EF997456198DD78
- FFFFFFFFFFFFFFFF FFFFFFFFFFFFFFFF 51866FD5B85ECB8A
- 3000000000000000 1000000000000001 7D856F9A613063F2 ???
- 1111111111111111 1111111111111111 2466DD878B963C9D
- 0123456789ABCDEF 1111111111111111 61F9C3802281B096
- 1111111111111111 0123456789ABCDEF 7D0CC630AFDA1EC7
- 0000000000000000 0000000000000000 4EF997456198DD78
- FEDCBA9876543210 0123456789ABCDEF 0ACEAB0FC6A0A28D
- 7CA110454A1A6E57 01A1D6D039776742 59C68245EB05282B
- 0131D9619DC1376E 5CD54CA83DEF57DA B1B8CC0B250F09A0
- 07A1133E4A0B2686 0248D43806F67172 1730E5778BEA1DA4
- 3849674C2602319E 51454B582DDF440A A25E7856CF2651EB
- 04B915BA43FEB5B6 42FD443059577FA2 353882B109CE8F1A
- 0113B970FD34F2CE 059B5E0851CF143A 48F4D0884C379918
- 0170F175468FB5E6 0756D8E0774761D2 432193B78951FC98
- 43297FAD38E373FE 762514B829BF486A 13F04154D69D1AE5
- 07A7137045DA2A16 3BDD119049372802 2EEDDA93FFD39C79
- 04689104C2FD3B2F 26955F6835AF609A D887E0393C2DA6E3
- 37D06BB516CB7546 164D5E404F275232 5F99D04F5B163969
- 1F08260D1AC2465E 6B056E18759F5CCA 4A057A3B24D3977B
- 584023641ABA6176 004BD6EF09176062 452031C1E4FADA8E
- 025816164629B007 480D39006EE762F2 7555AE39F59B87BD
- 49793EBC79B3258F 437540C8698F3CFA 53C55F9CB49FC019
- 4FB05E1515AB73A7 072D43A077075292 7A8E7BFA937E89A3
- 49E95D6D4CA229BF 02FE55778117F12A CF9C5D7A4986ADB5
- 018310DC409B26D6 1D9D5C5018F728C2 D1ABB290658BC778
- 1C587F1C13924FEF 305532286D6F295A 55CB3774D13EF201
- 0101010101010101 0123456789ABCDEF FA34EC4847B268B2
- 1F1F1F1F0E0E0E0E 0123456789ABCDEF A790795108EA3CAE
- E0FEE0FEF1FEF1FE 0123456789ABCDEF C39E072D9FAC631D
- 0000000000000000 FFFFFFFFFFFFFFFF 014933E0CDAFF6E4
- FFFFFFFFFFFFFFFF 0000000000000000 F21E9A77B71C49BC
- 0123456789ABCDEF 0000000000000000 245946885754369A
- FEDCBA9876543210 FFFFFFFFFFFFFFFF 6B5C5A9C5D9E0A5A
- set_key test data
- data[8]= FEDCBA9876543210
- c=F9AD597C49DB005E k[ 1]=F0
- c=E91D21C1D961A6D6 k[ 2]=F0E1
- c=E9C2B70A1BC65CF3 k[ 3]=F0E1D2
- c=BE1E639408640F05 k[ 4]=F0E1D2C3
- c=B39E44481BDB1E6E k[ 5]=F0E1D2C3B4
- c=9457AA83B1928C0D k[ 6]=F0E1D2C3B4A5
- c=8BB77032F960629D k[ 7]=F0E1D2C3B4A596
- c=E87A244E2CC85E82 k[ 8]=F0E1D2C3B4A59687
- c=15750E7A4F4EC577 k[ 9]=F0E1D2C3B4A5968778
- c=122BA70B3AB64AE0 k[10]=F0E1D2C3B4A596877869
- c=3A833C9AFFC537F6 k[11]=F0E1D2C3B4A5968778695A
- c=9409DA87A90F6BF2 k[12]=F0E1D2C3B4A5968778695A4B
- c=884F80625060B8B4 k[13]=F0E1D2C3B4A5968778695A4B3C
- c=1F85031C19E11968 k[14]=F0E1D2C3B4A5968778695A4B3C2D
- c=79D9373A714CA34F k[15]=F0E1D2C3B4A5968778695A4B3C2D1E ???
- c=93142887EE3BE15C k[16]=F0E1D2C3B4A5968778695A4B3C2D1E0F
- c=03429E838CE2D14B k[17]=F0E1D2C3B4A5968778695A4B3C2D1E0F00
- c=A4299E27469FF67B k[18]=F0E1D2C3B4A5968778695A4B3C2D1E0F0011
- c=AFD5AED1C1BC96A8 k[19]=F0E1D2C3B4A5968778695A4B3C2D1E0F001122
- c=10851C0E3858DA9F k[20]=F0E1D2C3B4A5968778695A4B3C2D1E0F00112233
- c=E6F51ED79B9DB21F k[21]=F0E1D2C3B4A5968778695A4B3C2D1E0F0011223344
- c=64A6E14AFD36B46F k[22]=F0E1D2C3B4A5968778695A4B3C2D1E0F001122334455
- c=80C7D7D45A5479AD k[23]=F0E1D2C3B4A5968778695A4B3C2D1E0F00112233445566
- c=05044B62FA52D080 k[24]=F0E1D2C3B4A5968778695A4B3C2D1E0F0011223344556677
- chaining mode test data
- key[16] = 0123456789ABCDEFF0E1D2C3B4A59687
- iv[8] = FEDCBA9876543210
- data[29] = "7654321 Now is the time for " (includes trailing '\0')
- data[29] = 37363534333231204E6F77206973207468652074696D6520666F722000
- cbc cipher text
- cipher[32]= 6B77B4D63006DEE605B156E27403979358DEB9E7154616D959F1652BD5FF92CC
- cfb64 cipher text cipher[29]=
- E73214A2822139CAF26ECF6D2EB9E76E3DA3DE04D1517200519D57A6C3
- ofb64 cipher text cipher[29]=
- E73214A2822139CA62B343CC5B65587310DD908D0C241B2263C2CF80DA
- */
- #ifndef __BLOWFISH_H__
- #define __BLOWFISH_H__
- //Block Structure
- struct SBlock
- {
- //Constructors
- SBlock(unsigned int l=0, unsigned int r=0) : m_uil(l), m_uir(r) {}
- //Copy Constructor
- SBlock(const SBlock& roBlock) : m_uil(roBlock.m_uil), m_uir(roBlock.m_uir) {}
- SBlock& operator^=(SBlock& b) { m_uil ^= b.m_uil; m_uir ^= b.m_uir; return *this; }
- unsigned int m_uil, m_uir;
- };
- class CBlowFish
- {
- public:
- enum { ECB=0, CBC=1, CFB=2 };
- //Constructor - Initialize the P and S boxes for a given Key
- CBlowFish(unsigned char* ucKey, size_t n, const SBlock& roChain = SBlock(0UL,0UL));
- //Resetting the chaining block
- void ResetChain() { m_oChain = m_oChain0; }
- // Encrypt/Decrypt Buffer in Place
- void Encrypt(unsigned char* buf, size_t n, int iMode=ECB);
- void Decrypt(unsigned char* buf, size_t n, int iMode=ECB);
- // Encrypt/Decrypt from Input Buffer to Output Buffer
- void Encrypt(const unsigned char* in, unsigned char* out, size_t n, int iMode=ECB);
- void Decrypt(const unsigned char* in, unsigned char* out, size_t n, int iMode=ECB);
- //Private Functions
- private:
- unsigned int F(unsigned int ui);
- void Encrypt(SBlock&);
- void Decrypt(SBlock&);
- private:
- //The Initialization Vector, by default {0, 0}
- SBlock m_oChain0;
- SBlock m_oChain;
- unsigned int m_auiP[18];
- unsigned int m_auiS[4][256];
- static const unsigned int scm_auiInitP[18];
- static const unsigned int scm_auiInitS[4][256];
- };
- //Extract low order byte
- inline unsigned char Byte(unsigned int ui)
- {
- return (unsigned char)(ui & 0xff);
- }
- //Function F
- inline unsigned int CBlowFish::F(unsigned int ui)
- {
- return ((m_auiS[0][Byte(ui>>24)] + m_auiS[1][Byte(ui>>16)]) ^ m_auiS[2][Byte(ui>>8)]) + m_auiS[3][Byte(ui)];
- }
- #endif // __BLOWFISH_H__
- ////////////////////////////////////////////////////////////////////////////
- ///
- // BlowFish.cpp
- //
- // Implementation of Bruce Schneier's BLOWFISH algorithm from "Applied
- // Cryptography", Second Edition.
- #include <cstring>
- #include <exception>
- #include "Blowfish.h"
- //Initialization with a fixed string which consists of the hexadecimal digits of PI (less the initial 3)
- //P-array, 18 32-bit subkeys
- const unsigned int CBlowFish::scm_auiInitP[18] = {
- 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
- 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
- 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
- 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
- 0x9216d5d9, 0x8979fb1b
- };
- //Four 32-bit S-boxes with 256 entries each
- const unsigned int CBlowFish::scm_auiInitS[4][256] = {
- //0
- {0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
- 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
- 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
- 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
- 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
- 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
- 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
- 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
- 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
- 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
- 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
- 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
- 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
- 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
- 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
- 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
- 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
- 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
- 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
- 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
- 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
- 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
- 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
- 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
- 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
- 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
- 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
- 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
- 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
- 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
- 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
- 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
- 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
- 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
- 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
- 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
- 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
- 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
- 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
- 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
- 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
- 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
- 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
- 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
- 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
- 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
- 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
- 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
- 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
- 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
- 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
- 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
- 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
- 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
- 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
- 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
- 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
- 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
- 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
- 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
- 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
- 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
- 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
- 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a},
- //1
- {0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
- 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
- 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
- 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
- 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
- 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
- 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
- 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
- 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
- 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
- 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
- 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
- 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
- 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
- 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
- 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
- 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
- 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
- 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
- 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
- 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
- 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
- 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
- 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
- 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
- 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
- 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
- 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
- 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
- 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
- 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
- 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
- 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
- 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
- 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
- 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
- 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
- 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
- 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
- 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
- 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
- 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
- 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
- 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
- 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
- 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
- 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
- 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
- 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
- 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
- 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
- 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
- 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
- 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
- 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
- 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
- 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
- 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
- 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
- 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
- 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
- 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
- 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
- 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7},
- //2
- {0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
- 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
- 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
- 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
- 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
- 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
- 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
- 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
- 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
- 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
- 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
- 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
- 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
- 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
- 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
- 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
- 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
- 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
- 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
- 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
- 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
- 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
- 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
- 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
- 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
- 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
- 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
- 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
- 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
- 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
- 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
- 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
- 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
- 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
- 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
- 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
- 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
- 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
- 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
- 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
- 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
- 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
- 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
- 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
- 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
- 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
- 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
- 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
- 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
- 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
- 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
- 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
- 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
- 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
- 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
- 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
- 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
- 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
- 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
- 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
- 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
- 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
- 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
- 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0},
- //3
- {0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
- 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
- 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
- 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
- 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
- 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
- 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
- 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
- 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
- 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
- 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
- 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
- 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
- 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
- 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
- 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
- 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
- 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
- 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
- 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
- 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
- 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
- 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
- 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
- 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
- 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
- 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
- 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
- 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
- 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
- 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
- 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
- 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
- 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
- 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
- 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
- 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
- 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
- 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
- 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
- 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
- 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
- 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
- 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
- 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
- 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
- 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
- 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
- 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
- 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
- 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
- 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
- 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
- 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
- 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
- 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
- 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
- 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
- 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
- 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
- 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
- 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
- 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
- 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6}
- };
- //Constructor - Initialize the P and S boxes for a given Key
- CBlowFish::CBlowFish(unsigned char* ucKey, size_t keysize, const SBlock& roChain) : m_oChain0(roChain), m_oChain(roChain)
- {
- if(keysize<1)
- throw exception("Incorrect key length");
- //Check the Key - the key length should be between 1 and 56 bytes
- if(keysize>56)
- keysize = 56;
- unsigned char aucLocalKey[56];
- unsigned int i, j;
- memcpy(aucLocalKey, ucKey, keysize);
- //Reflexive Initialization of the Blowfish.
- //Generating the Subkeys from the Key flood P and S boxes with PI
- memcpy(m_auiP, scm_auiInitP, sizeof m_auiP);
- memcpy(m_auiS, scm_auiInitS, sizeof m_auiS);
- //Load P boxes with key bytes
- const unsigned char* p = aucLocalKey;
- unsigned int x=0;
- //Repeatedly cycle through the key bits until the entire P array has been XORed with key bits
- int iCount = 0;
- for(i=0; i<18; i++)
- {
- x=0;
- for(int n=4; n--; )
- {
- int iVal = (int)(*p);
- x <<= 8;
- x |= *(p++);
- iCount++;
- if(iCount == keysize)
- {
- //All bytes used, so recycle bytes
- iCount = 0;
- p = aucLocalKey;
- }
- }
- m_auiP[i] ^= x;
- }
- //Reflect P and S boxes through the evolving Blowfish
- SBlock block(0UL,0UL); //all-zero block
- for(i=0; i<18; )
- Encrypt(block), m_auiP[i++] = block.m_uil, m_auiP[i++] = block.m_uir;
- for(j=0; j<4; j++)
- for(int k=0; k<256; )
- Encrypt(block), m_auiS[j][k++] = block.m_uil, m_auiS[j][k++] = block.m_uir;
- }
- //Sixteen Round Encipher of Block
- void CBlowFish::Encrypt(SBlock& block)
- {
- unsigned int uiLeft = block.m_uil;
- unsigned int uiRight = block.m_uir;
- uiLeft ^= m_auiP[0];
- uiRight ^= F(uiLeft)^m_auiP[1]; uiLeft ^= F(uiRight)^m_auiP[2];
- uiRight ^= F(uiLeft)^m_auiP[3]; uiLeft ^= F(uiRight)^m_auiP[4];
- uiRight ^= F(uiLeft)^m_auiP[5]; uiLeft ^= F(uiRight)^m_auiP[6];
- uiRight ^= F(uiLeft)^m_auiP[7]; uiLeft ^= F(uiRight)^m_auiP[8];
- uiRight ^= F(uiLeft)^m_auiP[9]; uiLeft ^= F(uiRight)^m_auiP[10];
- uiRight ^= F(uiLeft)^m_auiP[11]; uiLeft ^= F(uiRight)^m_auiP[12];
- uiRight ^= F(uiLeft)^m_auiP[13]; uiLeft ^= F(uiRight)^m_auiP[14];
- uiRight ^= F(uiLeft)^m_auiP[15]; uiLeft ^= F(uiRight)^m_auiP[16];
- uiRight ^= m_auiP[17];
- block.m_uil = uiRight;
- block.m_uir = uiLeft;
- }
- //Sixteen Round Decipher of SBlock
- void CBlowFish::Decrypt(SBlock& block)
- {
- unsigned int uiLeft = block.m_uil;
- unsigned int uiRight = block.m_uir;
- uiLeft ^= m_auiP[17];
- uiRight ^= F(uiLeft)^m_auiP[16]; uiLeft ^= F(uiRight)^m_auiP[15];
- uiRight ^= F(uiLeft)^m_auiP[14]; uiLeft ^= F(uiRight)^m_auiP[13];
- uiRight ^= F(uiLeft)^m_auiP[12]; uiLeft ^= F(uiRight)^m_auiP[11];
- uiRight ^= F(uiLeft)^m_auiP[10]; uiLeft ^= F(uiRight)^m_auiP[9];
- uiRight ^= F(uiLeft)^m_auiP[8]; uiLeft ^= F(uiRight)^m_auiP[7];
- uiRight ^= F(uiLeft)^m_auiP[6]; uiLeft ^= F(uiRight)^m_auiP[5];
- uiRight ^= F(uiLeft)^m_auiP[4]; uiLeft ^= F(uiRight)^m_auiP[3];
- uiRight ^= F(uiLeft)^m_auiP[2]; uiLeft ^= F(uiRight)^m_auiP[1];
- uiRight ^= m_auiP[0];
- block.m_uil = uiRight;
- block.m_uir = uiLeft;
- }
- //Semi-Portable Byte Shuffling
- inline void BytesToBlock(unsigned char const* p, SBlock& b)
- {
- unsigned int y;
- //Left
- b.m_uil = 0;
- y = *p++;
- y <<= 24;
- b.m_uil |= y;
- y = *p++;
- y <<= 16;
- b.m_uil |= y;
- y = *p++;
- y <<= 8;
- b.m_uil |= y;
- y = *p++;
- b.m_uil |= y;
- //Right
- b.m_uir = 0;
- y = *p++;
- y <<= 24;
- b.m_uir |= y;
- y = *p++;
- y <<= 16;
- b.m_uir |= y;
- y = *p++;
- y <<= 8;
- b.m_uir |= y;
- y = *p++;
- b.m_uir |= y;
- }
- inline void BlockToBytes(SBlock const& b, unsigned char* p)
- {
- unsigned int y;
- //Right
- y = b.m_uir;
- *--p = Byte(y);
- y = b.m_uir >> 8;
- *--p = Byte(y);
- y = b.m_uir >> 16;
- *--p = Byte(y);
- y = b.m_uir >> 24;
- *--p = Byte(y);
- //Left
- y = b.m_uil;
- *--p = Byte(y);
- y = b.m_uil >> 8;
- *--p = Byte(y);
- y = b.m_uil >> 16;
- *--p = Byte(y);
- y = b.m_uil >> 24;
- *--p = Byte(y);
- }
- //Encrypt Buffer in Place
- //Returns false if n is multiple of 8
- void CBlowFish::Encrypt(unsigned char* buf, size_t n, int iMode)
- {
- //Check the buffer's length - should be > 0 and multiple of 8
- if((n==0)||(n%8!=0))
- throw exception("Incorrect buffer length");
- SBlock work;
- if(iMode == CBC) //CBC mode, using the Chain
- {
- SBlock chain(m_oChain);
- for(; n >= 8; n -= 8)
- {
- BytesToBlock(buf, work);
- work ^= chain;
- Encrypt(work);
- chain = work;
- BlockToBytes(work, buf+=8);
- }
- }
- else if(iMode == CFB) //CFB mode, using the Chain
- {
- SBlock chain(m_oChain);
- for(; n >= 8; n -= 8)
- {
- Encrypt(chain);
- BytesToBlock(buf, work);
- work ^= chain;
- chain = work;
- BlockToBytes(work, buf+=8);
- }
- }
- else //ECB mode, not using the Chain
- {
- for(; n >= 8; n -= 8)
- {
- BytesToBlock(buf, work);
- Encrypt(work);
- BlockToBytes(work, buf+=8);
- }
- }
- }
- //Decrypt Buffer in Place
- //Returns false if n is multiple of 8
- void CBlowFish::Decrypt(unsigned char* buf, size_t n, int iMode)
- {
- //Check the buffer's length - should be > 0 and multiple of 8
- if((n==0)||(n%8!=0))
- throw exception("Incorrect buffer length");
- SBlock work;
- if(iMode == CBC) //CBC mode, using the Chain
- {
- SBlock crypt, chain(m_oChain);
- for(; n >= 8; n -= 8)
- {
- BytesToBlock(buf, work);
- crypt = work;
- Decrypt(work);
- work ^= chain;
- chain = crypt;
- BlockToBytes(work, buf+=8);
- }
- }
- else if(iMode == CFB) //CFB mode, using the Chain, not using Decrypt()
- {
- SBlock crypt, chain(m_oChain);
- for(; n >= 8; n -= 8)
- {
- BytesToBlock(buf, work);
- Encrypt(chain);
- crypt = work;
- work ^= chain;
- chain = crypt;
- BlockToBytes(work, buf+=8);
- }
- }
- else //ECB mode, not using the Chain
- {
- for(; n >= 8; n -= 8)
- {
- BytesToBlock(buf, work);
- Decrypt(work);
- BlockToBytes(work, buf+=8);
- }
- }
- }
- //Encrypt from Input Buffer to Output Buffer
- //Returns false if n is multiple of 8
- void CBlowFish::Encrypt(const unsigned char* in, unsigned char* out, size_t n, int iMode)
- {
- //Check the buffer's length - should be > 0 and multiple of 8
- if((n==0)||(n%8!=0))
- throw exception("Incorrect buffer length");
- SBlock work;
- if(iMode == CBC) //CBC mode, using the Chain
- {
- SBlock chain(m_oChain);
- for(; n >= 8; n -= 8, in += 8)
- {
- BytesToBlock(in, work);
- work ^= chain;
- Encrypt(work);
- chain = work;
- BlockToBytes(work, out+=8);
- }
- }
- else if(iMode == CFB) //CFB mode, using the Chain
- {
- SBlock chain(m_oChain);
- for(; n >= 8; n -= 8, in += 8)
- {
- Encrypt(chain);
- BytesToBlock(in, work);
- work ^= chain;
- chain = work;
- BlockToBytes(work, out+=8);
- }
- }
- else //ECB mode, not using the Chain
- {
- for(; n >= 8; n -= 8, in += 8)
- {
- BytesToBlock(in, work);
- Encrypt(work);
- BlockToBytes(work, out+=8);
- }
- }
- }
- //Decrypt from Input Buffer to Output Buffer
- //Returns false if n is multiple of 8
- void CBlowFish::Decrypt(const unsigned char* in, unsigned char* out, size_t n, int iMode)
- {
- //Check the buffer's length - should be > 0 and multiple of 8
- if((n==0)||(n%8!=0))
- throw exception("Incorrect buffer length");
- SBlock work;
- if(iMode == CBC) //CBC mode, using the Chain
- {
- SBlock crypt, chain(m_oChain);
- for(; n >= 8; n -= 8, in += 8)
- {
- BytesToBlock(in, work);
- crypt = work;
- Decrypt(work);
- work ^= chain;
- chain = crypt;
- BlockToBytes(work, out+=8);
- }
- }
- else if(iMode == CFB) //CFB mode, using the Chain, not using Decrypt()
- {
- SBlock crypt, chain(m_oChain);
- for(; n >= 8; n -= 8, in += 8)
- {
- BytesToBlock(in, work);
- Encrypt(chain);
- crypt = work;
- work ^= chain;
- chain = crypt;
- BlockToBytes(work, out+=8);
- }
- }
- else //ECB mode, not using the Chain
- {
- for(; n >= 8; n -= 8, in += 8)
- {
- BytesToBlock(in, work);
- Decrypt(work);
- BlockToBytes(work, out+=8);
- }
- }
- }
- 使用实例
- try
- {
- CBlowFish oBlowFish((unsigned char*)"1234567890123456", 16);
- char szDataIn1[49] = "ababababccccccccababababccccccccababababcccccccc";
- char szDataIn[49];
- char szDataOut[49];
- memset(szDataIn, 0, 49);
- memset(szDataOut, 0, 49);
- //Test ECB
- strcpy(szDataIn, szDataIn1);
- memset(szDataOut, 0, 49);
- oBlowFish.Encrypt((unsigned char*)szDataIn,
- (unsigned char*)szDataOut, 48, CBlowFish::ECB);
- memset(szDataIn, 0, 49);
- oBlowFish.Decrypt((unsigned char*)szDataOut,
- (unsigned char*)szDataIn, 48, CBlowFish::ECB);
- //Test CBC
- oBlowFish.ResetChain();
- strcpy(szDataIn, szDataIn1);
- memset(szDataOut, 0, 49);
- oBlowFish.Encrypt((unsigned char*)szDataIn,
- (unsigned char*)szDataOut, 48, CBlowFish::CBC);
- memset(szDataIn, 0, 49);
- oBlowFish.ResetChain();
- oBlowFish.Decrypt((unsigned char*)szDataOut,
- (unsigned char*)szDataIn, 48, CBlowFish::CBC);
- //Test CFB
- oBlowFish.ResetChain();
- strcpy(szDataIn, szDataIn1);
- memset(szDataOut, 0, 49);
- oBlowFish.Encrypt((unsigned char*)szDataIn,
- (unsigned char*)szDataOut, 48, CBlowFish::CFB);
- memset(szDataIn, 0, 49);
- oBlowFish.ResetChain();
- oBlowFish.Decrypt((unsigned char*)szDataOut,
- (unsigned char*)szDataIn, 48, CBlowFish::CFB);
- cout << endl;
- }
- catch(exception& roException)
- {
- cout << "Exception: "
- << roException.what() << endl;
- }