mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.7 KiB
89 lines
2.7 KiB
9 years ago
|
#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
|