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i2pd
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Split tunnel-specific crypto from aes.h/cpp.

pull/239/head
EinMByte 9 years ago
parent
d9bb09780f
commit
9597917183
9 changed files with 394 additions and 369 deletions
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  1. 66
      AESNIMacros.h
  2. 1
      build/CMakeLists.txt
  3. 205
      crypto/aes.cpp
  4. 44
      crypto/aes.h
  5. 2
      filelist.mk
  6. 2
      tunnel/TransitTunnel.h
  7. 2
      tunnel/TunnelConfig.h
  8. 88
      tunnel/TunnelCrypto.cpp
  9. 49
      tunnel/TunnelCrypto.h

66
AESNIMacros.h
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@ -0,0 +1,66 @@
#ifndef AESNIMACROS_H__
#define AESNIMACROS_H__
#define KeyExpansion256(round0,round1) \
"pshufd $0xff, %%xmm2, %%xmm2 \n" \
"movaps %%xmm1, %%xmm4 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pxor %%xmm2, %%xmm1 \n" \
"movaps %%xmm1, "#round0"(%[sched]) \n" \
"aeskeygenassist $0, %%xmm1, %%xmm4 \n" \
"pshufd $0xaa, %%xmm4, %%xmm2 \n" \
"movaps %%xmm3, %%xmm4 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pxor %%xmm2, %%xmm3 \n" \
"movaps %%xmm3, "#round1"(%[sched]) \n"
#define EncryptAES256(sched) \
"pxor (%["#sched"]), %%xmm0 \n" \
"aesenc 16(%["#sched"]), %%xmm0 \n" \
"aesenc 32(%["#sched"]), %%xmm0 \n" \
"aesenc 48(%["#sched"]), %%xmm0 \n" \
"aesenc 64(%["#sched"]), %%xmm0 \n" \
"aesenc 80(%["#sched"]), %%xmm0 \n" \
"aesenc 96(%["#sched"]), %%xmm0 \n" \
"aesenc 112(%["#sched"]), %%xmm0 \n" \
"aesenc 128(%["#sched"]), %%xmm0 \n" \
"aesenc 144(%["#sched"]), %%xmm0 \n" \
"aesenc 160(%["#sched"]), %%xmm0 \n" \
"aesenc 176(%["#sched"]), %%xmm0 \n" \
"aesenc 192(%["#sched"]), %%xmm0 \n" \
"aesenc 208(%["#sched"]), %%xmm0 \n" \
"aesenclast 224(%["#sched"]), %%xmm0 \n"
#define DecryptAES256(sched) \
"pxor 224(%["#sched"]), %%xmm0 \n" \
"aesdec 208(%["#sched"]), %%xmm0 \n" \
"aesdec 192(%["#sched"]), %%xmm0 \n" \
"aesdec 176(%["#sched"]), %%xmm0 \n" \
"aesdec 160(%["#sched"]), %%xmm0 \n" \
"aesdec 144(%["#sched"]), %%xmm0 \n" \
"aesdec 128(%["#sched"]), %%xmm0 \n" \
"aesdec 112(%["#sched"]), %%xmm0 \n" \
"aesdec 96(%["#sched"]), %%xmm0 \n" \
"aesdec 80(%["#sched"]), %%xmm0 \n" \
"aesdec 64(%["#sched"]), %%xmm0 \n" \
"aesdec 48(%["#sched"]), %%xmm0 \n" \
"aesdec 32(%["#sched"]), %%xmm0 \n" \
"aesdec 16(%["#sched"]), %%xmm0 \n" \
"aesdeclast (%["#sched"]), %%xmm0 \n"
#define CallAESIMC(offset) \
"movaps "#offset"(%[shed]), %%xmm0 \n" \
"aesimc %%xmm0, %%xmm0 \n" \
"movaps %%xmm0, "#offset"(%[shed]) \n"
#endif

1
build/CMakeLists.txt
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@ -31,6 +31,7 @@ set (COMMON_SRC
"${CMAKE_SOURCE_DIR}/tunnel/TunnelGateway.cpp" "${CMAKE_SOURCE_DIR}/tunnel/TunnelGateway.cpp"
"${CMAKE_SOURCE_DIR}/tunnel/TunnelEndpoint.cpp" "${CMAKE_SOURCE_DIR}/tunnel/TunnelEndpoint.cpp"
"${CMAKE_SOURCE_DIR}/tunnel/TunnelPool.cpp" "${CMAKE_SOURCE_DIR}/tunnel/TunnelPool.cpp"
"${CMAKE_SOURCE_DIR}/tunnel/TunnelCrypto.cpp"
"${CMAKE_SOURCE_DIR}/AddressBook.cpp" "${CMAKE_SOURCE_DIR}/AddressBook.cpp"
"${CMAKE_SOURCE_DIR}/Garlic.cpp" "${CMAKE_SOURCE_DIR}/Garlic.cpp"
"${CMAKE_SOURCE_DIR}/I2NPProtocol.cpp" "${CMAKE_SOURCE_DIR}/I2NPProtocol.cpp"

205
crypto/aes.cpp
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@ -1,39 +1,14 @@
#include <stdlib.h> #include <stdlib.h>
#include "tunnel/TunnelBase.h"
#include "aes.h" #include "aes.h"
namespace i2p namespace i2p {
{ namespace crypto {
namespace crypto
{
#ifdef AESNI #ifdef AESNI
#include "AESNIMacros.h"
#define KeyExpansion256(round0,round1) \ void ECBCryptoAESNI::ExpandKey (const AESKey& key)
"pshufd $0xff, %%xmm2, %%xmm2 \n" \ {
"movaps %%xmm1, %%xmm4 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm1 \n" \
"pxor %%xmm2, %%xmm1 \n" \
"movaps %%xmm1, "#round0"(%[sched]) \n" \
"aeskeygenassist $0, %%xmm1, %%xmm4 \n" \
"pshufd $0xaa, %%xmm4, %%xmm2 \n" \
"movaps %%xmm3, %%xmm4 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pslldq $4, %%xmm4 \n" \
"pxor %%xmm4, %%xmm3 \n" \
"pxor %%xmm2, %%xmm3 \n" \
"movaps %%xmm3, "#round1"(%[sched]) \n"
void ECBCryptoAESNI::ExpandKey (const AESKey& key)
{
__asm__ __asm__
( (
"movups (%[key]), %%xmm1 \n" "movups (%[key]), %%xmm1 \n"
@ -68,27 +43,10 @@ namespace crypto
: [key]"r"((const uint8_t *)key), [sched]"r"(GetKeySchedule ()) // input : [key]"r"((const uint8_t *)key), [sched]"r"(GetKeySchedule ()) // input
: "%xmm1", "%xmm2", "%xmm3", "%xmm4", "memory" // clogged : "%xmm1", "%xmm2", "%xmm3", "%xmm4", "memory" // clogged
); );
} }
#define EncryptAES256(sched) \
"pxor (%["#sched"]), %%xmm0 \n" \
"aesenc 16(%["#sched"]), %%xmm0 \n" \
"aesenc 32(%["#sched"]), %%xmm0 \n" \
"aesenc 48(%["#sched"]), %%xmm0 \n" \
"aesenc 64(%["#sched"]), %%xmm0 \n" \
"aesenc 80(%["#sched"]), %%xmm0 \n" \
"aesenc 96(%["#sched"]), %%xmm0 \n" \
"aesenc 112(%["#sched"]), %%xmm0 \n" \
"aesenc 128(%["#sched"]), %%xmm0 \n" \
"aesenc 144(%["#sched"]), %%xmm0 \n" \
"aesenc 160(%["#sched"]), %%xmm0 \n" \
"aesenc 176(%["#sched"]), %%xmm0 \n" \
"aesenc 192(%["#sched"]), %%xmm0 \n" \
"aesenc 208(%["#sched"]), %%xmm0 \n" \
"aesenclast 224(%["#sched"]), %%xmm0 \n"
void ECBEncryptionAESNI::Encrypt (const ChipherBlock * in, ChipherBlock * out) void ECBEncryptionAESNI::Encrypt (const ChipherBlock * in, ChipherBlock * out)
{ {
__asm__ __asm__
( (
"movups (%[in]), %%xmm0 \n" "movups (%[in]), %%xmm0 \n"
@ -96,27 +54,11 @@ namespace crypto
"movups %%xmm0, (%[out]) \n" "movups %%xmm0, (%[out]) \n"
: : [sched]"r"(GetKeySchedule ()), [in]"r"(in), [out]"r"(out) : "%xmm0", "memory" : : [sched]"r"(GetKeySchedule ()), [in]"r"(in), [out]"r"(out) : "%xmm0", "memory"
); );
} }
#define DecryptAES256(sched) \
"pxor 224(%["#sched"]), %%xmm0 \n" \
"aesdec 208(%["#sched"]), %%xmm0 \n" \
"aesdec 192(%["#sched"]), %%xmm0 \n" \
"aesdec 176(%["#sched"]), %%xmm0 \n" \
"aesdec 160(%["#sched"]), %%xmm0 \n" \
"aesdec 144(%["#sched"]), %%xmm0 \n" \
"aesdec 128(%["#sched"]), %%xmm0 \n" \
"aesdec 112(%["#sched"]), %%xmm0 \n" \
"aesdec 96(%["#sched"]), %%xmm0 \n" \
"aesdec 80(%["#sched"]), %%xmm0 \n" \
"aesdec 64(%["#sched"]), %%xmm0 \n" \
"aesdec 48(%["#sched"]), %%xmm0 \n" \
"aesdec 32(%["#sched"]), %%xmm0 \n" \
"aesdec 16(%["#sched"]), %%xmm0 \n" \
"aesdeclast (%["#sched"]), %%xmm0 \n"
void ECBDecryptionAESNI::Decrypt (const ChipherBlock * in, ChipherBlock * out) void ECBDecryptionAESNI::Decrypt (const ChipherBlock * in, ChipherBlock * out)
{ {
__asm__ __asm__
( (
"movups (%[in]), %%xmm0 \n" "movups (%[in]), %%xmm0 \n"
@ -124,15 +66,10 @@ namespace crypto
"movups %%xmm0, (%[out]) \n" "movups %%xmm0, (%[out]) \n"
: : [sched]"r"(GetKeySchedule ()), [in]"r"(in), [out]"r"(out) : "%xmm0", "memory" : : [sched]"r"(GetKeySchedule ()), [in]"r"(in), [out]"r"(out) : "%xmm0", "memory"
); );
} }
#define CallAESIMC(offset) \
"movaps "#offset"(%[shed]), %%xmm0 \n" \
"aesimc %%xmm0, %%xmm0 \n" \
"movaps %%xmm0, "#offset"(%[shed]) \n"
void ECBDecryptionAESNI::SetKey (const AESKey& key) void ECBDecryptionAESNI::SetKey (const AESKey& key)
{ {
ExpandKey (key); // expand encryption key first ExpandKey (key); // expand encryption key first
// then invert it using aesimc // then invert it using aesimc
__asm__ __asm__
@ -152,13 +89,13 @@ namespace crypto
CallAESIMC(208) CallAESIMC(208)
: : [shed]"r"(GetKeySchedule ()) : "%xmm0", "memory" : : [shed]"r"(GetKeySchedule ()) : "%xmm0", "memory"
); );
} }
#endif #endif
void CBCEncryption::Encrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out) void CBCEncryption::Encrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out)
{ {
#ifdef AESNI #ifdef AESNI
__asm__ __asm__
( (
@ -187,18 +124,18 @@ namespace crypto
out[i] = m_LastBlock; out[i] = m_LastBlock;
} }
#endif #endif
} }
void CBCEncryption::Encrypt (const uint8_t * in, std::size_t len, uint8_t * out) void CBCEncryption::Encrypt (const uint8_t * in, std::size_t len, uint8_t * out)
{ {
// len/16 // len/16
int numBlocks = len >> 4; int numBlocks = len >> 4;
if (numBlocks > 0) if (numBlocks > 0)
Encrypt (numBlocks, (const ChipherBlock *)in, (ChipherBlock *)out); Encrypt (numBlocks, (const ChipherBlock *)in, (ChipherBlock *)out);
} }
void CBCEncryption::Encrypt (const uint8_t * in, uint8_t * out) void CBCEncryption::Encrypt (const uint8_t * in, uint8_t * out)
{ {
#ifdef AESNI #ifdef AESNI
__asm__ __asm__
( (
@ -216,10 +153,10 @@ namespace crypto
#else #else
Encrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out); Encrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
#endif #endif
} }
void CBCDecryption::Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out) void CBCDecryption::Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out)
{ {
#ifdef AESNI #ifdef AESNI
__asm__ __asm__
( (
@ -250,17 +187,17 @@ namespace crypto
m_IV = tmp; m_IV = tmp;
} }
#endif #endif
} }
void CBCDecryption::Decrypt (const uint8_t * in, std::size_t len, uint8_t * out) void CBCDecryption::Decrypt (const uint8_t * in, std::size_t len, uint8_t * out)
{ {
int numBlocks = len >> 4; int numBlocks = len >> 4;
if (numBlocks > 0) if (numBlocks > 0)
Decrypt (numBlocks, (const ChipherBlock *)in, (ChipherBlock *)out); Decrypt (numBlocks, (const ChipherBlock *)in, (ChipherBlock *)out);
} }
void CBCDecryption::Decrypt (const uint8_t * in, uint8_t * out) void CBCDecryption::Decrypt (const uint8_t * in, uint8_t * out)
{ {
#ifdef AESNI #ifdef AESNI
__asm__ __asm__
( (
@ -278,80 +215,8 @@ namespace crypto
#else #else
Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out); Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
#endif #endif
}
void TunnelEncryption::Encrypt (const uint8_t * in, uint8_t * out)
{
#ifdef AESNI
__asm__
(
// encrypt IV
"movups (%[in]), %%xmm0 \n"
EncryptAES256(sched_iv)
"movaps %%xmm0, %%xmm1 \n"
// double IV encryption
EncryptAES256(sched_iv)
"movups %%xmm0, (%[out]) \n"
// encrypt data, IV is xmm1
"1: \n"
"add $16, %[in] \n"
"add $16, %[out] \n"
"movups (%[in]), %%xmm0 \n"
"pxor %%xmm1, %%xmm0 \n"
EncryptAES256(sched_l)
"movaps %%xmm0, %%xmm1 \n"
"movups %%xmm0, (%[out]) \n"
"dec %[num] \n"
"jnz 1b \n"
:
: [sched_iv]"r"(m_IVEncryption.GetKeySchedule ()), [sched_l]"r"(m_LayerEncryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out), [num]"r"(63) // 63 blocks = 1008 bytes
: "%xmm0", "%xmm1", "cc", "memory"
);
#else
m_IVEncryption.Encrypt ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
m_LayerEncryption.SetIV (out);
m_LayerEncryption.Encrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
m_IVEncryption.Encrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
#endif
}
void TunnelDecryption::Decrypt (const uint8_t * in, uint8_t * out)
{
#ifdef AESNI
__asm__
(
// decrypt IV
"movups (%[in]), %%xmm0 \n"
DecryptAES256(sched_iv)
"movaps %%xmm0, %%xmm1 \n"
// double IV encryption
DecryptAES256(sched_iv)
"movups %%xmm0, (%[out]) \n"
// decrypt data, IV is xmm1
"1: \n"
"add $16, %[in] \n"
"add $16, %[out] \n"
"movups (%[in]), %%xmm0 \n"
"movaps %%xmm0, %%xmm2 \n"
DecryptAES256(sched_l)
"pxor %%xmm1, %%xmm0 \n"
"movups %%xmm0, (%[out]) \n"
"movaps %%xmm2, %%xmm1 \n"
"dec %[num] \n"
"jnz 1b \n"
:
: [sched_iv]"r"(m_IVDecryption.GetKeySchedule ()), [sched_l]"r"(m_LayerDecryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out), [num]"r"(63) // 63 blocks = 1008 bytes
: "%xmm0", "%xmm1", "%xmm2", "cc", "memory"
);
#else
m_IVDecryption.Decrypt ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
m_LayerDecryption.SetIV (out);
m_LayerDecryption.Decrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
m_IVDecryption.Decrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
#endif
}
}
} }
} // crypto
} // i2p

44
crypto/aes.h
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@ -181,51 +181,7 @@ namespace crypto
ECBDecryption m_ECBDecryption; ECBDecryption m_ECBDecryption;
}; };
class TunnelEncryption // with double IV encryption
{
public:
void SetKeys (const AESKey& layerKey, const AESKey& ivKey)
{
m_LayerEncryption.SetKey (layerKey);
m_IVEncryption.SetKey (ivKey);
}
void Encrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data)
private:
ECBEncryption m_IVEncryption;
#ifdef AESNI
ECBEncryption m_LayerEncryption;
#else
CBCEncryption m_LayerEncryption;
#endif
};
class TunnelDecryption // with double IV encryption
{
public:
void SetKeys (const AESKey& layerKey, const AESKey& ivKey)
{
m_LayerDecryption.SetKey (layerKey);
m_IVDecryption.SetKey (ivKey);
}
void Decrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data)
private:
ECBDecryption m_IVDecryption;
#ifdef AESNI
ECBDecryption m_LayerDecryption;
#else
CBCDecryption m_LayerDecryption;
#endif
};
} }
} }
#endif #endif

2
filelist.mk
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@ -5,7 +5,7 @@ COMMON_SRC = \
crypto/CryptoConst.cpp crypto/aes.cpp crypto/Signature.cpp \ crypto/CryptoConst.cpp crypto/aes.cpp crypto/Signature.cpp \
tunnel/Tunnel.cpp tunnel/TransitTunnel.cpp tunnel/TunnelEndpoint.cpp \ tunnel/Tunnel.cpp tunnel/TransitTunnel.cpp tunnel/TunnelEndpoint.cpp \
tunnel/TunnelEndpoint.cpp tunnel/TunnelPool.cpp tunnel/TunnelGateway.cpp \ tunnel/TunnelEndpoint.cpp tunnel/TunnelPool.cpp tunnel/TunnelGateway.cpp \
Datagram.cpp Garlic.cpp I2NPProtocol.cpp LeaseSet.cpp \ tunnel/TunnelCrypto.cpp Datagram.cpp Garlic.cpp I2NPProtocol.cpp LeaseSet.cpp \
NetDb.cpp NetDbRequests.cpp Profiling.cpp Reseed.cpp \ NetDb.cpp NetDbRequests.cpp Profiling.cpp Reseed.cpp \
RouterContext.cpp RouterInfo.cpp Streaming.cpp Identity.cpp \ RouterContext.cpp RouterInfo.cpp Streaming.cpp Identity.cpp \
Destination.cpp UPnP.cpp Destination.cpp UPnP.cpp

2
tunnel/TransitTunnel.h
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@ -5,7 +5,7 @@
#include <vector> #include <vector>
#include <mutex> #include <mutex>
#include <memory> #include <memory>
#include "crypto/aes.h" #include "TunnelCrypto.h"
#include "I2NPProtocol.h" #include "I2NPProtocol.h"
#include "TunnelEndpoint.h" #include "TunnelEndpoint.h"
#include "TunnelGateway.h" #include "TunnelGateway.h"

2
tunnel/TunnelConfig.h
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@ -5,7 +5,7 @@
#include <sstream> #include <sstream>
#include <vector> #include <vector>
#include <memory> #include <memory>
#include "crypto/aes.h" #include "TunnelCrypto.h"
#include "RouterInfo.h" #include "RouterInfo.h"
#include "RouterContext.h" #include "RouterContext.h"
#include "util/Timestamp.h" #include "util/Timestamp.h"

88
tunnel/TunnelCrypto.cpp
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@ -0,0 +1,88 @@
#include "TunnelCrypto.h"
#include "TunnelBase.h"
#include "AESNIMacros.h"
namespace i2p {
namespace crypto {
void TunnelEncryption::SetKeys (const AESKey& layerKey, const AESKey& ivKey)
{
m_LayerEncryption.SetKey (layerKey);
m_IVEncryption.SetKey (ivKey);
}
void TunnelEncryption::Encrypt (const uint8_t * in, uint8_t * out)
{
#ifdef AESNI
__asm__
(
// encrypt IV
"movups (%[in]), %%xmm0 \n"
EncryptAES256(sched_iv)
"movaps %%xmm0, %%xmm1 \n"
// double IV encryption
EncryptAES256(sched_iv)
"movups %%xmm0, (%[out]) \n"
// encrypt data, IV is xmm1
"1: \n"
"add $16, %[in] \n"
"add $16, %[out] \n"
"movups (%[in]), %%xmm0 \n"
"pxor %%xmm1, %%xmm0 \n"
EncryptAES256(sched_l)
"movaps %%xmm0, %%xmm1 \n"
"movups %%xmm0, (%[out]) \n"
"dec %[num] \n"
"jnz 1b \n"
:
: [sched_iv]"r"(m_IVEncryption.GetKeySchedule ()), [sched_l]"r"(m_LayerEncryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out), [num]"r"(63) // 63 blocks = 1008 bytes
: "%xmm0", "%xmm1", "cc", "memory"
);
#else
m_IVEncryption.Encrypt ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
m_LayerEncryption.SetIV (out);
m_LayerEncryption.Encrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
m_IVEncryption.Encrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
#endif
}
void TunnelDecryption::Decrypt (const uint8_t * in, uint8_t * out)
{
#ifdef AESNI
__asm__
(
// decrypt IV
"movups (%[in]), %%xmm0 \n"
DecryptAES256(sched_iv)
"movaps %%xmm0, %%xmm1 \n"
// double IV encryption
DecryptAES256(sched_iv)
"movups %%xmm0, (%[out]) \n"
// decrypt data, IV is xmm1
"1: \n"
"add $16, %[in] \n"
"add $16, %[out] \n"
"movups (%[in]), %%xmm0 \n"
"movaps %%xmm0, %%xmm2 \n"
DecryptAES256(sched_l)
"pxor %%xmm1, %%xmm0 \n"
"movups %%xmm0, (%[out]) \n"
"movaps %%xmm2, %%xmm1 \n"
"dec %[num] \n"
"jnz 1b \n"
:
: [sched_iv]"r"(m_IVDecryption.GetKeySchedule ()), [sched_l]"r"(m_LayerDecryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out), [num]"r"(63) // 63 blocks = 1008 bytes
: "%xmm0", "%xmm1", "%xmm2", "cc", "memory"
);
#else
m_IVDecryption.Decrypt ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
m_LayerDecryption.SetIV (out);
m_LayerDecryption.Decrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
m_IVDecryption.Decrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
#endif
}
} // crypto
} // i2p

49
tunnel/TunnelCrypto.h
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@ -0,0 +1,49 @@
#ifndef TUNNEL_CRYPTO_H__
#define TUNNEL_CRYPTO_H__
#include "crypto/aes.h"
namespace i2p {
namespace crypto {
class TunnelEncryption { // with double IV encryption
public:
void SetKeys (const AESKey& layerKey, const AESKey& ivKey);
void Encrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data)
private:
ECBEncryption m_IVEncryption;
#ifdef AESNI
ECBEncryption m_LayerEncryption;
#else
CBCEncryption m_LayerEncryption;
#endif
};
class TunnelDecryption { // with double IV encryption
public:
void SetKeys (const AESKey& layerKey, const AESKey& ivKey)
{
m_LayerDecryption.SetKey (layerKey);
m_IVDecryption.SetKey (ivKey);
}
void Decrypt (const uint8_t * in, uint8_t * out); // 1024 bytes (16 IV + 1008 data)
private:
ECBDecryption m_IVDecryption;
#ifdef AESNI
ECBDecryption m_LayerDecryption;
#else
CBCDecryption m_LayerDecryption;
#endif
};
} // crypto
} // i2p
#endif
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