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360 lines
9.6 KiB
C++
360 lines
9.6 KiB
C++
#include <stdlib.h>
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#include "TunnelBase.h"
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#include "aes.h"
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namespace i2p
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{
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namespace crypto
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{
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#ifdef AESNI
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ECBCryptoAESNI::ECBCryptoAESNI ()
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{
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m_KeySchedule = m_UnalignedBuffer;
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uint8_t rem = ((uint64_t)m_KeySchedule) & 0x0f;
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if (rem)
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m_KeySchedule += (16 - rem);
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}
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#define KeyExpansion256(round0,round1) \
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"pshufd $0xff, %%xmm2, %%xmm2 \n" \
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"movaps %%xmm1, %%xmm4 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm1 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm1 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm1 \n" \
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"pxor %%xmm2, %%xmm1 \n" \
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"movaps %%xmm1, "#round0"(%[sched]) \n" \
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"aeskeygenassist $0, %%xmm1, %%xmm4 \n" \
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"pshufd $0xaa, %%xmm4, %%xmm2 \n" \
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"movaps %%xmm3, %%xmm4 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm3 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm3 \n" \
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"pslldq $4, %%xmm4 \n" \
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"pxor %%xmm4, %%xmm3 \n" \
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"pxor %%xmm2, %%xmm3 \n" \
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"movaps %%xmm3, "#round1"(%[sched]) \n"
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void ECBCryptoAESNI::ExpandKey (const uint8_t * key)
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{
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__asm__
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(
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"movups (%[key]), %%xmm1 \n"
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"movups 16(%[key]), %%xmm3 \n"
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"movaps %%xmm1, (%[sched]) \n"
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"movaps %%xmm3, 16(%[sched]) \n"
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"aeskeygenassist $1, %%xmm3, %%xmm2 \n"
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KeyExpansion256(32,48)
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"aeskeygenassist $2, %%xmm3, %%xmm2 \n"
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KeyExpansion256(64,80)
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"aeskeygenassist $4, %%xmm3, %%xmm2 \n"
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KeyExpansion256(96,112)
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"aeskeygenassist $8, %%xmm3, %%xmm2 \n"
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KeyExpansion256(128,144)
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"aeskeygenassist $16, %%xmm3, %%xmm2 \n"
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KeyExpansion256(160,176)
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"aeskeygenassist $32, %%xmm3, %%xmm2 \n"
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KeyExpansion256(192,208)
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"aeskeygenassist $64, %%xmm3, %%xmm2 \n"
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// key expansion final
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"pshufd $0xff, %%xmm2, %%xmm2 \n"
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"movaps %%xmm1, %%xmm4 \n"
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"pslldq $4, %%xmm4 \n"
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"pxor %%xmm4, %%xmm1 \n"
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"pslldq $4, %%xmm4 \n"
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"pxor %%xmm4, %%xmm1 \n"
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"pslldq $4, %%xmm4 \n"
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"pxor %%xmm4, %%xmm1 \n"
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"pxor %%xmm2, %%xmm1 \n"
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"movups %%xmm1, 224(%[sched]) \n"
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: // output
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: [key]"r"(key), [sched]"r"(m_KeySchedule) // input
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: "%xmm1", "%xmm2", "%xmm3", "%xmm4" // clogged
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);
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}
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#define EncryptAES256(sched) \
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"pxor (%["#sched"]), %%xmm0 \n" \
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"aesenc 16(%["#sched"]), %%xmm0 \n" \
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"aesenc 32(%["#sched"]), %%xmm0 \n" \
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"aesenc 48(%["#sched"]), %%xmm0 \n" \
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"aesenc 64(%["#sched"]), %%xmm0 \n" \
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"aesenc 80(%["#sched"]), %%xmm0 \n" \
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"aesenc 96(%["#sched"]), %%xmm0 \n" \
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"aesenc 112(%["#sched"]), %%xmm0 \n" \
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"aesenc 128(%["#sched"]), %%xmm0 \n" \
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"aesenc 144(%["#sched"]), %%xmm0 \n" \
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"aesenc 160(%["#sched"]), %%xmm0 \n" \
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"aesenc 176(%["#sched"]), %%xmm0 \n" \
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"aesenc 192(%["#sched"]), %%xmm0 \n" \
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"aesenc 208(%["#sched"]), %%xmm0 \n" \
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"aesenclast 224(%["#sched"]), %%xmm0 \n"
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void ECBEncryptionAESNI::Encrypt (const ChipherBlock * in, ChipherBlock * out)
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{
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__asm__
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(
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"movups (%[in]), %%xmm0 \n"
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EncryptAES256(sched)
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"movups %%xmm0, (%[out]) \n"
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: : [sched]"r"(m_KeySchedule), [in]"r"(in), [out]"r"(out) : "%xmm0"
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);
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}
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#define DecryptAES256(sched) \
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"pxor 224(%["#sched"]), %%xmm0 \n" \
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"aesdec 208(%["#sched"]), %%xmm0 \n" \
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"aesdec 192(%["#sched"]), %%xmm0 \n" \
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"aesdec 176(%["#sched"]), %%xmm0 \n" \
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"aesdec 160(%["#sched"]), %%xmm0 \n" \
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"aesdec 144(%["#sched"]), %%xmm0 \n" \
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"aesdec 128(%["#sched"]), %%xmm0 \n" \
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"aesdec 112(%["#sched"]), %%xmm0 \n" \
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"aesdec 96(%["#sched"]), %%xmm0 \n" \
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"aesdec 80(%["#sched"]), %%xmm0 \n" \
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"aesdec 64(%["#sched"]), %%xmm0 \n" \
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"aesdec 48(%["#sched"]), %%xmm0 \n" \
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"aesdec 32(%["#sched"]), %%xmm0 \n" \
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"aesdec 16(%["#sched"]), %%xmm0 \n" \
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"aesdeclast (%["#sched"]), %%xmm0 \n"
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void ECBDecryptionAESNI::Decrypt (const ChipherBlock * in, ChipherBlock * out)
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{
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__asm__
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(
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"movups (%[in]), %%xmm0 \n"
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DecryptAES256(sched)
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"movups %%xmm0, (%[out]) \n"
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: : [sched]"r"(m_KeySchedule), [in]"r"(in), [out]"r"(out) : "%xmm0"
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);
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}
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#define CallAESIMC(offset) \
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"movaps "#offset"(%[shed]), %%xmm0 \n" \
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"aesimc %%xmm0, %%xmm0 \n" \
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"movaps %%xmm0, "#offset"(%[shed]) \n"
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void ECBDecryptionAESNI::SetKey (const uint8_t * key)
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{
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ExpandKey (key); // expand encryption key first
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// then invert it using aesimc
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__asm__
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(
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CallAESIMC(16)
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CallAESIMC(32)
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CallAESIMC(48)
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CallAESIMC(64)
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CallAESIMC(80)
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CallAESIMC(96)
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CallAESIMC(112)
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CallAESIMC(128)
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CallAESIMC(144)
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CallAESIMC(160)
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CallAESIMC(176)
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CallAESIMC(192)
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CallAESIMC(208)
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: : [shed]"r"(m_KeySchedule) : "%xmm0"
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);
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}
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#endif
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void CBCEncryption::Encrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out)
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{
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#ifdef AESNI
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__asm__
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(
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"movups (%[iv]), %%xmm1 \n"
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"block_e: \n"
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"movups (%[in]), %%xmm0 \n"
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"pxor %%xmm1, %%xmm0 \n"
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EncryptAES256(sched)
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"movaps %%xmm0, %%xmm1 \n"
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"movups %%xmm0, (%[out]) \n"
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"add $16, %[in] \n"
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"add $16, %[out] \n"
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"dec %[num] \n"
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"jnz block_e; \n"
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"movups %%xmm1, (%[iv]) \n"
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:
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: [iv]"r"(&m_LastBlock), [sched]"r"(m_ECBEncryption.GetKeySchedule ()),
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[in]"r"(in), [out]"r"(out), [num]"r"(numBlocks)
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: "%xmm0", "%xmm1", "cc", "memory"
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);
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#else
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for (int i = 0; i < numBlocks; i++)
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{
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m_LastBlock ^= in[i];
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m_ECBEncryption.Encrypt (&m_LastBlock, &m_LastBlock);
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out[i] = m_LastBlock;
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}
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#endif
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}
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void CBCEncryption::Encrypt (const uint8_t * in, std::size_t len, uint8_t * out)
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{
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// len/16
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Encrypt (len >> 4, (const ChipherBlock *)in, (ChipherBlock *)out);
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}
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void CBCEncryption::Encrypt (const uint8_t * in, uint8_t * out)
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{
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#ifdef AESNI
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__asm__
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(
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"movups (%[iv]), %%xmm1 \n"
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"movups (%[in]), %%xmm0 \n"
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"pxor %%xmm1, %%xmm0 \n"
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EncryptAES256(sched)
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"movups %%xmm0, (%[out]) \n"
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"movups %%xmm0, (%[iv]) \n"
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:
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: [iv]"r"(&m_LastBlock), [sched]"r"(m_ECBEncryption.GetKeySchedule ()),
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[in]"r"(in), [out]"r"(out)
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: "%xmm0", "%xmm1", "memory"
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);
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#else
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Encrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
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#endif
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}
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void CBCDecryption::Decrypt (int numBlocks, const ChipherBlock * in, ChipherBlock * out)
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{
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#ifdef AESNI
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__asm__
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(
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"movups (%[iv]), %%xmm1 \n"
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"block_d: \n"
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"movups (%[in]), %%xmm0 \n"
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"movaps %%xmm0, %%xmm2 \n"
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DecryptAES256(sched)
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"pxor %%xmm1, %%xmm0 \n"
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"movups %%xmm0, (%[out]) \n"
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"movaps %%xmm2, %%xmm1 \n"
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"add $16, %[in] \n"
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"add $16, %[out] \n"
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"dec %[num] \n"
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"jnz block_d; \n"
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"movups %%xmm1, (%[iv]) \n"
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:
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: [iv]"r"(&m_IV), [sched]"r"(m_ECBDecryption.GetKeySchedule ()),
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[in]"r"(in), [out]"r"(out), [num]"r"(numBlocks)
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: "%xmm0", "%xmm1", "%xmm2", "cc", "memory"
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);
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#else
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for (int i = 0; i < numBlocks; i++)
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{
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ChipherBlock tmp = in[i];
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m_ECBDecryption.Decrypt (in + i, out + i);
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out[i] ^= m_IV;
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m_IV = tmp;
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}
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#endif
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}
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void CBCDecryption::Decrypt (const uint8_t * in, std::size_t len, uint8_t * out)
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{
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Decrypt (len >> 4, (const ChipherBlock *)in, (ChipherBlock *)out);
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}
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void CBCDecryption::Decrypt (const uint8_t * in, uint8_t * out)
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{
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#ifdef AESNI
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__asm__
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(
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"movups (%[iv]), %%xmm1 \n"
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"movups (%[in]), %%xmm0 \n"
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"movups %%xmm0, (%[iv]) \n"
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DecryptAES256(sched)
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"pxor %%xmm1, %%xmm0 \n"
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"movups %%xmm0, (%[out]) \n"
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:
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: [iv]"r"(&m_IV), [sched]"r"(m_ECBDecryption.GetKeySchedule ()),
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[in]"r"(in), [out]"r"(out)
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: "%xmm0", "%xmm1", "memory"
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);
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#else
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Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
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#endif
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}
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void TunnelEncryption::Encrypt (uint8_t * payload)
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{
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#ifdef AESNI
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__asm__
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(
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// encrypt IV
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"movups (%[payload]), %%xmm0 \n"
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EncryptAES256(sched_iv)
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"movaps %%xmm0, %%xmm1 \n"
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// double IV encryption
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EncryptAES256(sched_iv)
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"movups %%xmm0, (%[payload]) \n"
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// encrypt data, IV is xmm1
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"block_et: \n"
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"add $16, %[payload] \n"
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"movups (%[payload]), %%xmm0 \n"
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"pxor %%xmm1, %%xmm0 \n"
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EncryptAES256(sched_l)
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"movaps %%xmm0, %%xmm1 \n"
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"movups %%xmm0, (%[payload]) \n"
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"dec %[num] \n"
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"jnz block_et; \n"
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:
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: [sched_iv]"r"(m_IVEncryption.GetKeySchedule ()), [sched_l]"r"(m_LayerEncryption.GetKeySchedule ()),
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[payload]"r"(payload), [num]"r"(63) // 63 blocks = 1008 bytes
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: "%xmm0", "%xmm1", "cc", "memory"
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);
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#else
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m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // iv
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m_LayerEncryption.SetIV (payload);
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m_LayerEncryption.Encrypt (payload + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, payload + 16); // data
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m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // double iv
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#endif
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}
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void TunnelDecryption::Decrypt (uint8_t * payload)
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{
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#ifdef AESNI
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__asm__
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(
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// decrypt IV
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"movups (%[payload]), %%xmm0 \n"
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DecryptAES256(sched_iv)
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"movaps %%xmm0, %%xmm1 \n"
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// double IV encryption
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DecryptAES256(sched_iv)
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"movups %%xmm0, (%[payload]) \n"
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// decrypt data, IV is xmm1
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"block_dt: \n"
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"add $16, %[payload] \n"
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"movups (%[payload]), %%xmm0 \n"
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"movaps %%xmm0, %%xmm2 \n"
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DecryptAES256(sched_l)
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"pxor %%xmm1, %%xmm0 \n"
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"movups %%xmm0, (%[payload]) \n"
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"movaps %%xmm2, %%xmm1 \n"
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"dec %[num] \n"
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"jnz block_dt; \n"
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:
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: [sched_iv]"r"(m_IVDecryption.GetKeySchedule ()), [sched_l]"r"(m_LayerDecryption.GetKeySchedule ()),
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[payload]"r"(payload), [num]"r"(63) // 63 blocks = 1008 bytes
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: "%xmm0", "%xmm1", "%xmm2", "cc", "memory"
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);
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#else
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m_IVDecryption.Decrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // iv
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m_LayerDecryption.SetIV (payload);
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m_LayerDecryption.Decrypt (payload + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, payload + 16); // data
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m_IVDecryption.Decrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // double iv
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#endif
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}
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}
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}
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