/*
This code is written by kerukuro for cppcrypto library (http://cppcrypto.sourceforge.net/)
and released into public domain.
*/
/* adapted for VeraCrypt */
#include "chacha256.h"
#include "cpu.h"
#include "misc.h"
#define rotater32(x,n) rotr32(x, n)
#define rotatel32(x,n) rotl32(x, n)
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
void chacha_ECRYPT_encrypt_bytes(size_t bytes, uint32* x, const unsigned char* m, unsigned char* out, unsigned char* output, unsigned int r);
#endif
static VC_INLINE void xor_block_512(const unsigned char* in, const unsigned char* prev, unsigned char* out)
{
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE && !defined(_UEFI) && (!defined (TC_WINDOWS_DRIVER) || (!defined (DEBUG) && defined (_WIN64)))
if (HasSSE2())
{
__m128i b1 = _mm_loadu_si128((const __m128i*) in);
__m128i p1 = _mm_loadu_si128((const __m128i*) prev);
__m128i b2 = _mm_loadu_si128((const __m128i*) (in + 16));
__m128i p2 = _mm_loadu_si128((const __m128i*) (prev + 16));
_mm_storeu_si128((__m128i*) out, _mm_xor_si128(b1, p1));
_mm_storeu_si128((__m128i*) (out + 16), _mm_xor_si128(b2, p2));
b1 = _mm_loadu_si128((const __m128i*) (in + 32));
p1 = _mm_loadu_si128((const __m128i*) (prev + 32));
b2 = _mm_loadu_si128((const __m128i*) (in + 48));
p2 = _mm_loadu_si128((const __m128i*) (prev + 48));
_mm_storeu_si128((__m128i*) (out + 32), _mm_xor_si128(b1, p1));
_mm_storeu_si128((__m128i*) (out + 48), _mm_xor_si128(b2, p2));
}
else
#endif
{
int i;
for (i = 0; i < 64; i++)
out[i] = in[i] ^ prev[i];
}
}
static VC_INLINE void chacha_core(uint32* x, int r)
{
int i;
for (i = 0; i < r; i++)
{
x[0] += x[4];
x[12] = rotatel32(x[12] ^ x[0], 16);
x[8] += x[12];
x[4] = rotatel32(x[4] ^ x[8], 12);
x[0] += x[4];
x[12] = rotatel32(x[12] ^ x[0], 8);
x[8] += x[12];
x[4] = rotatel32(x[4] ^ x[8], 7);
x[1] += x[5];
x[13] = rotatel32(x[13] ^ x[1], 16);
x[9] += x[13];
x[5] = rotatel32(x[5] ^ x[9], 12);
x[1] += x[5];
x[13] = rotatel32(x[13] ^ x[1], 8);
x[9] += x[13];
x[5] = rotatel32(x[5] ^ x[9], 7);
x[2] += x[6];
x[14] = rotatel32(x[14] ^ x[2], 16);
x[10] += x[14];
x[6] = rotatel32(x[6] ^ x[10], 12);
x[2] += x[6];
x[14] = rotatel32(x[14] ^ x[2], 8);
x[10] += x[14];
x[6] = rotatel32(x[6] ^ x[10], 7);
x[3] += x[7];
x[15] = rotatel32(x[15] ^ x[3], 16);
x[11] += x[15];
x[7] = rotatel32(x[7] ^ x[11], 12);
x[3] += x[7];
x[15] = rotatel32(x[15] ^ x[3], 8);
x[11] += x[15];
x[7] = rotatel32(x[7] ^ x[11], 7);
x[0] += x[5];
x[15] = rotatel32(x[15] ^ x[0], 16);
x[10] += x[15];
x[5] = rotatel32(x[5] ^ x[10], 12);
x[0] += x[5];
x[15] = rotatel32(x[15] ^ x[0], 8);
x[10] += x[15];
x[5] = rotatel32(x[5] ^ x[10], 7);
x[1] += x[6];
x[12] = rotatel32(x[12] ^ x[1], 16);
x[11] += x[12];
x[6] = rotatel32(x[6] ^ x[11], 12);
x[1] += x[6];
x[12] = rotatel32(x[12] ^ x[1], 8);
x[11] += x[12];
x[6] = rotatel32(x[6] ^ x[11], 7);
x[2] += x[7];
x[13] = rotatel32(x[13] ^ x[2], 16);
x[8] += x[13];
x[7] = rotatel32(x[7] ^ x[8], 12);
x[2] += x[7];
x[13] = rotatel32(x[13] ^ x[2], 8);
x[8] += x[13];
x[7] = rotatel32(x[7] ^ x[8], 7);
x[3] += x[4];
x[14] = rotatel32(x[14] ^ x[3], 16);
x[9] += x[14];
x[4] = rotatel32(x[4] ^ x[9], 12);
x[3] += x[4];
x[14] = rotatel32(x[14] ^ x[3], 8);
x[9] += x[14];
x[4] = rotatel32(x[4] ^ x[9], 7);
}
}
static VC_INLINE void chacha_hash(const uint32* in, uint32* out, int r)
{
uint32 x[16];
int i;
memcpy(x, in, 64);
chacha_core(x, r);
for (i = 0; i < 16; ++i)
out[i] = x[i] + in[i];
}
static VC_INLINE void incrementSalsaCounter(uint32* input, uint32* block, int r)
{
chacha_hash(input, block, r);
if (!++input[12])
++input[13];
}
static VC_INLINE void do_encrypt(const unsigned char* in, size_t len, unsigned char* out, int r, size_t* posPtr, uint32* input, uint32* block)
{
size_t i = 0, pos = *posPtr;
if (pos)
{
while (pos < len && pos < 64)
{
out[i] = in[i] ^ ((unsigned char*)block)[pos++];
++i;
}
len -= i;
}
if (len)
pos = 0;
#if CRYPTOPP_SSSE3_AVAILABLE && !defined(_UEFI) && (!defined (TC_WINDOWS_DRIVER) || (!defined (DEBUG) && defined (_WIN64)))
if (HasSSSE3())
{
size_t fullblocks = len - len % 64;
if (fullblocks)
{
chacha_ECRYPT_encrypt_bytes(fullblocks, input, in + i, out + i, (unsigned char*)block, r);
i += fullblocks;
len -= fullblocks;
}
if (len)
{
chacha_ECRYPT_encrypt_bytes(len, input, in + i, out + i, (unsigned char*)block, r);
pos = len;
}
*posPtr = pos;
return;
}
#endif
for (; len; len -= VC_MIN(64, len))
{
incrementSalsaCounter(input, block, r);
if (len >= 64)
{
xor_block_512(in + i, (unsigned char*)block, out + i);
i += 64;
}
else
{
for (; pos < len; pos++, i++)
out[i] = in[i] ^ ((unsigned char*)block)[pos];
}
}
*posPtr = pos;
}
void ChaCha256Init(ChaCha256Ctx* ctx, const unsigned char* key, const unsigned char* iv, int rounds)
{
ctx->internalRounds = rounds / 2;
ctx->pos = 0;
ctx->input_[12] = 0;
ctx->input_[13] = 0;
memcpy(ctx->input_ + 4, key, 32);
memcpy(ctx->input_ + 14, iv, 8);
ctx->input_[0] = 0x61707865;
ctx->input_[1] = 0x3320646E;
ctx->input_[2] = 0x79622D32;
ctx->input_[3] = 0x6B206574;
}
void ChaCha256Encrypt(ChaCha256Ctx* ctx, const unsigned char* in, size_t len, unsigned char* out)
{
do_encrypt(in, len, out, ctx->internalRounds, &ctx->pos, ctx->input_, ctx->block_);
}
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/*
Copyright (c) 2008-2009 TrueCrypt Developers Association. All rights reserved.
Governed by the TrueCrypt License 3.0 the full text of which is contained in
the file License.txt included in TrueCrypt binary and source code distribution
packages.
*/
#include "System.h"
#include "Application.h"
#include "FavoriteVolume.h"
#include "Xml.h"
namespace VeraCrypt
{
FavoriteVolumeList FavoriteVolume::LoadList ()
{
FavoriteVolumeList favorites;
FilePath path = Application::GetConfigFilePath (GetFileName());
if (path.IsFile())
{
foreach (XmlNode node, XmlParser (path).GetNodes (L"volume"))
{
VolumeSlotNumber slotNumber = 0;
wstring attr = wstring (node.Attributes[L"slotnumber"]);
if (!attr.empty())
slotNumber = StringConverter::ToUInt64 (attr);
bool readOnly = false;
attr = wstring (node.Attributes[L"readonly"]);
if (!attr.empty())
readOnly = (StringConverter::ToUInt32 (attr) != 0 ? true : false);
bool system = false;
attr = wstring (node.Attributes[L"system"]);
if (!attr.empty())
system = (StringConverter::ToUInt32 (attr) != 0 ? true : false);
favorites.push_back (shared_ptr <FavoriteVolume> (
new FavoriteVolume ((wstring) node.InnerText, wstring (node.Attributes[L"mountpoint"]), slotNumber, readOnly, system)));
}
}
return favorites;
}
void FavoriteVolume::SaveList (const FavoriteVolumeList &favorites)
{
FilePath favoritesCfgPath = Application::GetConfigFilePath (GetFileName(), true);
if (favorites.empty())
{
if (favoritesCfgPath.IsFile())
favoritesCfgPath.Delete();
}
else
{
XmlNode favoritesXml (L"favorites");
foreach_ref (const FavoriteVolume &favorite, favorites)
{
XmlNode node (L"volume", wstring (favorite.Path));
node.Attributes[L"mountpoint"] = wstring (favorite.MountPoint);
node.Attributes[L"slotnumber"] = StringConverter::FromNumber (favorite.SlotNumber);
node.Attributes[L"readonly"] = StringConverter::FromNumber (favorite.ReadOnly ? 1 : 0);
node.Attributes[L"system"] = StringConverter::FromNumber (favorite.System ? 1 : 0);
favoritesXml.InnerNodes.push_back (node);
}
XmlWriter favoritesWriter (favoritesCfgPath);
favoritesWriter.WriteNode (favoritesXml);
favoritesWriter.Close();
}
}
void FavoriteVolume::ToMountOptions (MountOptions &options) const
{
if (MountPoint.IsEmpty())
{
options.MountPoint.reset();
options.NoFilesystem = true;
}
else
options.MountPoint.reset (new DirectoryPath (MountPoint));
options.Path.reset (new VolumePath (Path));
options.PartitionInSystemEncryptionScope = System;
options.Protection = (ReadOnly ? VolumeProtection::ReadOnly : VolumeProtection::None);
options.SlotNumber = SlotNumber;
}
}
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