PurpleI2P/i2pd
1
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-02-07 07:44:13 +00:00
Code Issues Releases Activity

ChiperBlock XOR

Browse Source
This commit is contained in:
orignal 2014-05-09 12:05:04 -04:00
parent 9372b33c2c
commit 37c3a9dcf1
2 changed files with 5 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
aes.cpp
View File

@ -165,8 +165,7 @@ namespace crypto
{ {
for (int i = 0; i < numBlocks; i++) for (int i = 0; i < numBlocks; i++)
{ {
m_LastBlock.ll[0] ^= in[i].ll[0]; m_LastBlock ^= in[i];
m_LastBlock.ll[1] ^= in[i].ll[1];
m_ECBEncryption.Encrypt (&m_LastBlock, &m_LastBlock); m_ECBEncryption.Encrypt (&m_LastBlock, &m_LastBlock);
out[i] = m_LastBlock; out[i] = m_LastBlock;
} }
@ -186,8 +185,7 @@ namespace crypto
{ {
ChipherBlock tmp = in[i]; ChipherBlock tmp = in[i];
m_ECBDecryption.Decrypt (in + i, out + i); m_ECBDecryption.Decrypt (in + i, out + i);
out[i].ll[0] ^= m_IV.ll[0]; out[i] ^= m_IV;
out[i].ll[1] ^= m_IV.ll[1];
m_IV = tmp; m_IV = tmp;
} }
} }

5
aes.h
View File

@ -14,13 +14,14 @@ namespace crypto
uint8_t buf[16]; uint8_t buf[16];
uint64_t ll[2]; uint64_t ll[2];
void operator^(const ChipherBlock& other) // XOR void operator^=(const ChipherBlock& other) // XOR
{ {
#ifdef __x86_64__ #ifdef __x86_64__
__asm__ __asm__
( (
"movups (%[b1]), %%xmm0 \n" "movups (%[b1]), %%xmm0 \n"
"pxor (%[b2]), %%xmm0 \n" "movups (%[b2]), %%xmm1 \n" // b2 might not be 16-bytes aligned
"pxor %%xmm1, %%xmm0 \n"
"movups %%xmm0, (%[b1]) \n" "movups %%xmm0, (%[b1]) \n"
: : [b1]"r"(buf), [b2]"r"(other.buf): "memory", "%xmm0" : : [b1]"r"(buf), [b2]"r"(other.buf): "memory", "%xmm0"
); );