Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-02-02 02:54:01 +01:00
Code Issues Actions 6 Packages Projects Releases Wiki Activity

one block CBC encryption

Browse source
This commit is contained in:
orignal 2014-05-14 14:54:01 -04:00
parent 99c5331cad
commit 0a53555ac7
3 changed files with 46 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
NTCPSession.cpp
View file

@ -430,7 +430,7 @@ namespace ntcp
m_NextMessage = i2p::NewI2NPMessage ();
m_NextMessageOffset = 0;
m_Decryption.Decrypt (encrypted, 16, m_NextMessage->buf);
m_Decryption.Decrypt (encrypted, m_NextMessage->buf);
uint16_t dataSize = be16toh (*(uint16_t *)m_NextMessage->buf);
if (dataSize)
{
@ -450,7 +450,7 @@ namespace ntcp
}
else // message continues
{
m_Decryption.Decrypt (encrypted, 16, m_NextMessage->buf + m_NextMessageOffset);
m_Decryption.Decrypt (encrypted, m_NextMessage->buf + m_NextMessageOffset);
m_NextMessageOffset += 16;
}

42
aes.cpp
View file

@ -204,6 +204,27 @@ namespace crypto
return true;
}
void CBCEncryption::Encrypt (const uint8_t * in, uint8_t * out)
{
#ifdef __x86_64__
__asm__
(
"movups (%[iv]), %%xmm1 \n"
"movups (%[in]), %%xmm0 \n"
"pxor %%xmm1, %%xmm0 \n"
EncryptAES256
"movups %%xmm0, (%[out]) \n"
"movups %%xmm0, (%[iv]) \n"
:
: [iv]"r"(&m_LastBlock), [sched]"r"(m_ECBEncryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out)
: "%xmm0", "%xmm1", "memory"
);
#else
Encrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
#endif
}
void CBCDecryption::Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out)
{
#ifdef __x86_64__
@ -245,6 +266,27 @@ namespace crypto
Decrypt (d.quot, (const ChipherBlock *)in, (ChipherBlock *)out);
return true;
}
void CBCDecryption::Decrypt (const uint8_t * in, uint8_t * out)
{
#ifdef __x86_64__
__asm__
(
"movups (%[iv]), %%xmm1 \n"
"movups (%[in]), %%xmm0 \n"
"movups %%xmm0, (%[iv]) \n"
DecryptAES256
"pxor %%xmm1, %%xmm0 \n"
"movups %%xmm0, (%[out]) \n"
:
: [iv]"r"(&m_IV), [sched]"r"(m_ECBDecryption.GetKeySchedule ()),
[in]"r"(in), [out]"r"(out)
: "%xmm0", "%xmm1", "memory"
);
#else
Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
#endif
}
}
}

2
aes.h
View file

@ -111,6 +111,7 @@ namespace crypto
void Encrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out);
bool Encrypt (const uint8_t * in, std::size_t len, uint8_t * out);
void Encrypt (const uint8_t * in, uint8_t * out); // one block
private:
@ -130,6 +131,7 @@ namespace crypto
void Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out);
bool Decrypt (const uint8_t * in, std::size_t len, uint8_t * out);
void Decrypt (const uint8_t * in, uint8_t * out); // one block
private: