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tunnel encryption using AES-NI

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orignal 2014-05-15 12:59:07 -04:00
parent 6d1d816153
commit b4b3ba16cc
2 changed files with 31 additions and 0 deletions
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27
aes.cpp
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@ -291,9 +291,36 @@ namespace crypto
void TunnelEncryption::Encrypt (uint8_t * payload)
{
#ifdef __x86_64__
__asm__
(
// encrypt IV
"movups (%[payload]), %%xmm0 \n"
EncryptAES256(sched_iv)
"movaps %%xmm0, %%xmm1 \n"
// double IV encryption
EncryptAES256(sched_iv)
"movups %%xmm0, (%[payload]) \n"
// encrypt data, IV is xmm1
"block_et: \n"
"add $16, %[payload] \n"
"movups (%[payload]), %%xmm0 \n"
"pxor %%xmm1, %%xmm0 \n"
EncryptAES256(sched_l)
"movaps %%xmm0, %%xmm1 \n"
"movups %%xmm0, (%[payload]) \n"
"dec %[num] \n"
"jnz block_et; \n"
:
: [sched_iv]"r"(m_IVEncryption.GetKeySchedule ()), [sched_l]"r"(m_LayerEncryption.GetKeySchedule ()),
[payload]"r"(payload), [num]"r"(63) // 63 blocks = 1008 bytes
: "%xmm0", "%xmm1", "cc", "memory"
);
#else
m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // iv
m_LayerEncryption.Encrypt (payload + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, payload + 16); // data
m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // double iv
#endif
}
void TunnelDecryption::Decrypt (uint8_t * payload)

4
aes.h
View File

@ -154,7 +154,11 @@ namespace crypto
private:
ECBEncryption m_IVEncryption;
#ifdef __x86_64__
ECBEncryption m_LayerEncryption;
#else
CBCEncryption m_LayerEncryption;
#endif
};
class TunnelDecryption // with double IV encryption