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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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88 lines
2.7 KiB
88 lines
2.7 KiB
#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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