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OpenSSL's RC4 has been working just fine for HSPlasma and DirtSand...

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This commit is contained in:
Michael Hansen
2011-04-27 16:36:34 -07:00
parent 562b6fcfd0
commit 23d7e7bf43
2 changed files with 0 additions and 201 deletions
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23
Sources/Plasma/NucleusLib/pnUtils/Intern.h
View File

@ -51,27 +51,4 @@ public:
virtual unsigned GetBlockSize () const = 0;
};
//============================================================================
class KeyRc4 : public KeyBase {
private:
unsigned m_x;
unsigned m_y;
byte m_state[256];
void Initialize (unsigned bytes, const void * data);
public:
KeyRc4 (unsigned bytes, const void * data) { Initialize(bytes, data); }
void Codec (bool encrypt, ARRAY(byte) * dest, unsigned sourceBytes, const void * sourceData);
unsigned GetBlockSize () const { return 1; }
static void KeyGen (
unsigned randomBytes,
const void * randomData,
ARRAY(byte) * privateData
);
};
} // namespace Crypt

178
Sources/Plasma/NucleusLib/pnUtils/Private/pnUtCrypt.cpp
View File

@ -34,12 +34,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
#include <openssl/md5.h>
#include <openssl/sha.h>
// OpenSSL's RC4 algorithm has bugs and randomly corrupts data
//#define OPENSSL_RC4
#ifdef OPENSSL_RC4
#include <openssl/rc4.h>
#endif
/*****************************************************************************
*
@ -134,7 +129,6 @@ void Sha1Process (
*
***/
#ifdef OPENSSL_RC4
//============================================================================
static void Rc4Codec (
CryptKey * key,
@ -161,105 +155,6 @@ static void Rc4Codec (
MemCopy(data, temp, bytes);
}
#else // OPENSSL_RC4
//===========================================================================
void KeyRc4::Codec (bool encrypt, ARRAY(byte) * dest, unsigned sourceBytes, const void * sourceData) {
// RC4 uses the same algorithm to both encrypt and decrypt
dest->SetCount(sourceBytes);
byte * destDataPtr = (byte *)dest->Ptr();
const byte * sourceDataPtr = (const byte *)sourceData;
for (unsigned index = 0; index < sourceBytes; ++index) {
m_x = (m_x + 1) & 0xff;
m_y = (m_state[m_x] + m_y) & 0xff;
SWAP(m_state[m_x], m_state[m_y]);
const unsigned offset = (m_state[m_x] + m_state[m_y]) & 0xff;
destDataPtr[index] = (byte)(sourceDataPtr[index] ^ m_state[offset]);
}
}
//===========================================================================
void KeyRc4::KeyGen (
unsigned randomBytes,
const void * randomData,
ARRAY(byte) * privateData
) {
// Allocate an output digest
struct Digest { dword data[5]; };
privateData->SetCount(sizeof(Digest));
Digest * digest = (Digest *)privateData->Ptr();
// Perform the hash
{
// Initialize the hash values with the repeating pattern of random
// data
unsigned offset = 0;
for (; offset < sizeof(Digest); ++offset)
((byte *)digest)[offset] = ((const byte *)randomData)[offset % randomBytes];
for (; offset < randomBytes; ++offset)
((byte *)digest)[offset % sizeof(Digest)] ^= ((const byte *)randomData)[offset];
// 32-bit rotate left
#ifdef _MSC_VER
#define ROTL(n, X) _rotl(X, n)
#else
#define ROTL(n, X) (((X) << (n)) | ((X) >> (32 - (n))))
#endif
#define f1(x,y,z) (z ^ (x & (y ^ z))) // Rounds 0-19
#define K1 0x5A827999L // Rounds 0-19
#define subRound(a, b, c, d, e, f, k, data) (e += ROTL(5, a) + f(b, c, d) + k + data, b = ROTL(30, b))
// first five subrounds from SHA1
dword A = 0x67452301;
dword B = 0xEFCDAB89;
dword C = 0x98BADCFE;
dword D = 0x10325476;
dword E = 0xC3D2E1F0;
subRound(A, B, C, D, E, f1, K1, digest->data[ 0]);
subRound(E, A, B, C, D, f1, K1, digest->data[ 1]);
subRound(D, E, A, B, C, f1, K1, digest->data[ 2]);
subRound(C, D, E, A, B, f1, K1, digest->data[ 3]);
subRound(B, C, D, E, A, f1, K1, digest->data[ 4]);
digest->data[0] += A;
digest->data[1] += B;
digest->data[2] += C;
digest->data[3] += D;
digest->data[4] += E;
}
}
//===========================================================================
void KeyRc4::Initialize (unsigned bytes, const void * data) {
ASSERT(bytes);
ASSERT(data);
// Initialize key with default values
{
m_x = 0;
m_y = 0;
for (unsigned offset = 0; offset < arrsize(m_state); ++offset)
m_state[offset] = (byte) offset;
}
// Seed key from digest
{
unsigned index1 = 0;
unsigned index2 = 0;
for (unsigned offset = 0; offset < arrsize(m_state); ++offset) {
ASSERT(index1 < bytes);
index2 = (((const byte *)data)[index1] + m_state[offset] + index2) & 0xff;
SWAP(m_state[offset], m_state[index2]);
if (++index1 == bytes)
index1 = 0;
}
}
}
#endif // OPENSSL_RC4
} using namespace Crypt;
@ -319,18 +214,11 @@ CryptKey * CryptKeyCreate (
CryptKey * key = nil;
switch (algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
RC4_KEY * rc4 = NEW(RC4_KEY);
RC4_set_key(rc4, bytes, (const unsigned char *)data);
key = NEW(CryptKey);
key->algorithm = kCryptRc4;
key->handle = rc4;
#else
KeyRc4 * rc4 = NEWZERO(KeyRc4)(bytes, data);
key = NEW(CryptKey);
key->algorithm = kCryptRc4;
key->handle = rc4;
#endif
}
break;
@ -343,43 +231,6 @@ CryptKey * CryptKeyCreate (
return key;
}
//===========================================================================
// Not exposed in header because is not used at the moment and I don't want a big rebuild right now :)
void CryptKeyGenerate (
ECryptAlgorithm algorithm,
unsigned keyBits, // used for algorithms with variable key strength
unsigned randomBytes,
const void * randomData,
ARRAY(byte) * privateData,
ARRAY(byte) * publicData // only for public key cryptography
) {
// Allocate and fill in private and/or public key classes
switch (algorithm) {
case kCryptRc4:
KeyRc4::KeyGen(
randomBytes,
randomData,
privateData
);
break;
case kCryptRsa:
#if 0
KeyRsa::KeyGen(
keyBits,
randomBytes,
randomData,
privateData,
publicData
);
break;
#endif // fall thru to fatal...
DEFAULT_FATAL(algorithm);
}
}
//============================================================================
void CryptKeyClose (
CryptKey * key
@ -397,12 +248,7 @@ unsigned CryptKeyGetBlockSize (
) {
switch (key->algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
return 1;
#else
KeyRc4 * rc4 = (KeyRc4 *)key->handle;
return rc4->GetBlockSize();
#endif
}
break;
@ -537,12 +383,7 @@ void CryptEncrypt (
) {
switch (key->algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
Rc4Codec(key, true, dest, sourceBytes, sourceData);
#else
KeyRc4 * rc4 = (KeyRc4 *)key->handle;
rc4->Codec(true, dest, sourceBytes, sourceData);
#endif
}
break;
@ -564,14 +405,7 @@ void CryptEncrypt (
switch (key->algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
Rc4Codec(key, true, bytes, data);
#else
ARRAY(byte) dest;
dest.Reserve(bytes);
CryptEncrypt(key, &dest, bytes, data);
MemCopy(data, dest.Ptr(), bytes);
#endif
}
break;
@ -592,12 +426,7 @@ void CryptDecrypt (
) {
switch (key->algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
Rc4Codec(key, false, dest, sourceBytes, sourceData);
#else
KeyRc4 * rc4 = (KeyRc4 *)key->handle;
rc4->Codec(false, dest, sourceBytes, sourceData);
#endif
}
break;
@ -619,14 +448,7 @@ void CryptDecrypt (
switch (key->algorithm) {
case kCryptRc4: {
#ifdef OPENSSL_RC4
Rc4Codec(key, false, bytes, data);
#else
ARRAY(byte) dest;
dest.Reserve(bytes);
CryptDecrypt(key, &dest, bytes, data);
MemCopy(data, dest.Ptr(), bytes);
#endif
}
break;