shenleiandClaude Opus 5.5
a46093104c
- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
(+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten
No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
// rc5.cpp - originally written and placed in the public domain by Wei Dai
|
|
|
|
#include "pch.h"
|
|
#include "rc5.h"
|
|
#include "misc.h"
|
|
#include "secblock.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
void RC5::Base::UncheckedSetKey(const byte *k, unsigned int keylen, const NameValuePairs ¶ms)
|
|
{
|
|
AssertValidKeyLength(keylen);
|
|
|
|
r = GetRoundsAndThrowIfInvalid(params, this);
|
|
sTable.New(2*(r+1));
|
|
|
|
static const RC5_WORD MAGIC_P = 0xb7e15163L; // magic constant P for wordsize
|
|
static const RC5_WORD MAGIC_Q = 0x9e3779b9L; // magic constant Q for wordsize
|
|
static const int U=sizeof(RC5_WORD);
|
|
|
|
const unsigned int c = STDMAX((keylen+U-1)/U, 1U); // RC6 paper says c=1 if keylen==0
|
|
SecBlock<RC5_WORD> l(c);
|
|
|
|
GetUserKey(LITTLE_ENDIAN_ORDER, l.begin(), c, k, keylen);
|
|
|
|
sTable[0] = MAGIC_P;
|
|
for (unsigned j=1; j<sTable.size();j++)
|
|
sTable[j] = sTable[j-1] + MAGIC_Q;
|
|
|
|
RC5_WORD a=0, b=0;
|
|
const unsigned n = 3*STDMAX((unsigned int)sTable.size(), c);
|
|
|
|
for (unsigned h=0; h < n; h++)
|
|
{
|
|
a = sTable[h % sTable.size()] = rotlConstant<3>((sTable[h % sTable.size()] + a + b));
|
|
b = l[h % c] = rotlMod((l[h % c] + a + b), (a+b));
|
|
}
|
|
}
|
|
|
|
typedef BlockGetAndPut<RC5::RC5_WORD, LittleEndian> Block;
|
|
|
|
void RC5::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
|
|
{
|
|
const RC5_WORD *sptr = sTable;
|
|
RC5_WORD a, b;
|
|
|
|
Block::Get(inBlock)(a)(b);
|
|
a += sptr[0];
|
|
b += sptr[1];
|
|
sptr += 2;
|
|
|
|
for(unsigned i=0; i<r; i++)
|
|
{
|
|
a = rotlMod(a^b,b) + sptr[2*i+0];
|
|
b = rotlMod(a^b,a) + sptr[2*i+1];
|
|
}
|
|
|
|
Block::Put(xorBlock, outBlock)(a)(b);
|
|
}
|
|
|
|
void RC5::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
|
|
{
|
|
const RC5_WORD *sptr = sTable.end();
|
|
RC5_WORD a, b;
|
|
|
|
Block::Get(inBlock)(a)(b);
|
|
|
|
for (unsigned i=0; i<r; i++)
|
|
{
|
|
sptr-=2;
|
|
b = rotrMod(b-sptr[1], a) ^ a;
|
|
a = rotrMod(a-sptr[0], b) ^ b;
|
|
}
|
|
b -= sTable[1];
|
|
a -= sTable[0];
|
|
|
|
Block::Put(xorBlock, outBlock)(a)(b);
|
|
}
|
|
|
|
NAMESPACE_END
|