mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-09-20 18:20:25 +03:00
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
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#include "TunnelCrypto.h"
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#include "TunnelBase.h"
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#include "AESNIMacros.h"
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namespace i2p {
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namespace crypto {
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void TunnelEncryption::SetKeys (const AESKey& layerKey, const AESKey& ivKey)
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{
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m_LayerEncryption.SetKey (layerKey);
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m_IVEncryption.SetKey (ivKey);
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}
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void TunnelEncryption::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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// encrypt IV
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"movups (%[in]), %%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, (%[out]) \n"
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// encrypt data, IV is xmm1
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"1: \n"
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"add $16, %[in] \n"
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"add $16, %[out] \n"
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"movups (%[in]), %%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, (%[out]) \n"
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"dec %[num] \n"
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"jnz 1b \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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[in]"r"(in), [out]"r"(out), [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 ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
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m_LayerEncryption.SetIV (out);
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m_LayerEncryption.Encrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
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m_IVEncryption.Encrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
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#endif
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}
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void TunnelDecryption::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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// decrypt IV
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"movups (%[in]), %%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, (%[out]) \n"
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// decrypt data, IV is xmm1
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"1: \n"
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"add $16, %[in] \n"
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"add $16, %[out] \n"
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"movups (%[in]), %%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, (%[out]) \n"
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"movaps %%xmm2, %%xmm1 \n"
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"dec %[num] \n"
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"jnz 1b \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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[in]"r"(in), [out]"r"(out), [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 ((const ChipherBlock *)in, (ChipherBlock *)out); // iv
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m_LayerDecryption.SetIV (out);
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m_LayerDecryption.Decrypt (in + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, out + 16); // data
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m_IVDecryption.Decrypt ((ChipherBlock *)out, (ChipherBlock *)out); // double iv
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#endif
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}
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} // crypto
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} // i2p
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