/* * Copyright (c)2013-2020 ZeroTier, Inc. * * Use of this software is governed by the Business Source License included * in the LICENSE.TXT file in the project's root directory. * * Change Date: 2026-01-01 * * On the date above, in accordance with the Business Source License, use * of this software will be governed by version 2.0 of the Apache License. */ /****/ #include "Constants.hpp" #include "AES.hpp" #ifdef ZT_AES_NEON namespace ZeroTier { namespace { ZT_INLINE uint8x16_t s_clmul_armneon_crypto(uint8x16_t h, uint8x16_t y, const uint8_t b[16]) noexcept { uint8x16_t r0, r1, t0, t1; r0 = vld1q_u8(b); const uint8x16_t z = veorq_u8(h, h); y = veorq_u8(r0, y); y = vrbitq_u8(y); const uint8x16_t p = vreinterpretq_u8_u64(vdupq_n_u64(0x0000000000000087)); t0 = vextq_u8(y, y, 8); __asm__ __volatile__("pmull %0.1q, %1.1d, %2.1d \n\t" : "=w" (r0) : "w" (h), "w" (y)); __asm__ __volatile__("pmull2 %0.1q, %1.2d, %2.2d \n\t" :"=w" (r1) : "w" (h), "w" (y)); __asm__ __volatile__("pmull %0.1q, %1.1d, %2.1d \n\t" : "=w" (t1) : "w" (h), "w" (t0)); __asm__ __volatile__("pmull2 %0.1q, %1.2d, %2.2d \n\t" :"=w" (t0) : "w" (h), "w" (t0)); t0 = veorq_u8(t0, t1); t1 = vextq_u8(z, t0, 8); r0 = veorq_u8(r0, t1); t1 = vextq_u8(t0, z, 8); r1 = veorq_u8(r1, t1); __asm__ __volatile__("pmull2 %0.1q, %1.2d, %2.2d \n\t" :"=w" (t0) : "w" (r1), "w" (p)); t1 = vextq_u8(t0, z, 8); r1 = veorq_u8(r1, t1); t1 = vextq_u8(z, t0, 8); r0 = veorq_u8(r0, t1); __asm__ __volatile__("pmull %0.1q, %1.1d, %2.1d \n\t" : "=w" (t0) : "w" (r1), "w" (p)); return vrbitq_u8(veorq_u8(r0, t0)); } } // anonymous namespace void AES::GMAC::p_armUpdate(const uint8_t *in, unsigned int len) noexcept { uint8x16_t y = vld1q_u8(reinterpret_cast(_y)); const uint8x16_t h = _aes.p_k.neon.h; if (_rp) { for(;;) { if (!len) { return; } --len; _r[_rp++] = *(in++); if (_rp == 16) { y = s_clmul_armneon_crypto(h, y, _r); break; } } } while (len >= 16) { y = s_clmul_armneon_crypto(h, y, in); in += 16; len -= 16; } vst1q_u8(reinterpret_cast(_y), y); for (unsigned int i = 0; i < len; ++i) { _r[i] = in[i]; } _rp = len; // len is always less than 16 here } void AES::GMAC::p_armFinish(uint8_t tag[16]) noexcept { uint64_t tmp[2]; uint8x16_t y = vld1q_u8(reinterpret_cast(_y)); const uint8x16_t h = _aes.p_k.neon.h; if (_rp) { while (_rp < 16) { _r[_rp++] = 0; } y = s_clmul_armneon_crypto(h, y, _r); } tmp[0] = Utils::hton((uint64_t)_len << 3U); tmp[1] = 0; y = s_clmul_armneon_crypto(h, y, reinterpret_cast(tmp)); Utils::copy< 12 >(tmp, _iv); #if __BYTE_ORDER == __BIG_ENDIAN reinterpret_cast(tmp)[3] = 0x00000001; #else reinterpret_cast(tmp)[3] = 0x01000000; #endif _aes.encrypt(tmp, tmp); uint8x16_t yy = y; Utils::storeMachineEndian< uint64_t >(tag, tmp[0] ^ reinterpret_cast(&yy)[0]); Utils::storeMachineEndian< uint64_t >(tag + 8, tmp[1] ^ reinterpret_cast(&yy)[1]); } void AES::CTR::p_armCrypt(const uint8_t *in, uint8_t *out, unsigned int len) noexcept { uint8x16_t dd = vrev32q_u8(vld1q_u8(reinterpret_cast(_ctr))); const uint32x4_t one = {0,0,0,1}; uint8x16_t k0 = _aes.p_k.neon.ek[0]; uint8x16_t k1 = _aes.p_k.neon.ek[1]; uint8x16_t k2 = _aes.p_k.neon.ek[2]; uint8x16_t k3 = _aes.p_k.neon.ek[3]; uint8x16_t k4 = _aes.p_k.neon.ek[4]; uint8x16_t k5 = _aes.p_k.neon.ek[5]; uint8x16_t k6 = _aes.p_k.neon.ek[6]; uint8x16_t k7 = _aes.p_k.neon.ek[7]; uint8x16_t k8 = _aes.p_k.neon.ek[8]; uint8x16_t k9 = _aes.p_k.neon.ek[9]; uint8x16_t k10 = _aes.p_k.neon.ek[10]; uint8x16_t k11 = _aes.p_k.neon.ek[11]; uint8x16_t k12 = _aes.p_k.neon.ek[12]; uint8x16_t k13 = _aes.p_k.neon.ek[13]; uint8x16_t k14 = _aes.p_k.neon.ek[14]; unsigned int totalLen = _len; if ((totalLen & 15U) != 0) { for (;;) { if (unlikely(!len)) { vst1q_u8(reinterpret_cast(_ctr), vrev32q_u8(dd)); _len = totalLen; return; } --len; out[totalLen++] = *(in++); if ((totalLen & 15U) == 0) { uint8_t *const otmp = out + (totalLen - 16); uint8x16_t d0 = vrev32q_u8(dd); uint8x16_t pt = vld1q_u8(otmp); d0 = vaesmcq_u8(vaeseq_u8(d0, k0)); d0 = vaesmcq_u8(vaeseq_u8(d0, k1)); d0 = vaesmcq_u8(vaeseq_u8(d0, k2)); d0 = vaesmcq_u8(vaeseq_u8(d0, k3)); d0 = vaesmcq_u8(vaeseq_u8(d0, k4)); d0 = vaesmcq_u8(vaeseq_u8(d0, k5)); d0 = vaesmcq_u8(vaeseq_u8(d0, k6)); d0 = vaesmcq_u8(vaeseq_u8(d0, k7)); d0 = vaesmcq_u8(vaeseq_u8(d0, k8)); d0 = vaesmcq_u8(vaeseq_u8(d0, k9)); d0 = vaesmcq_u8(vaeseq_u8(d0, k10)); d0 = vaesmcq_u8(vaeseq_u8(d0, k11)); d0 = vaesmcq_u8(vaeseq_u8(d0, k12)); d0 = veorq_u8(vaeseq_u8(d0, k13), k14); vst1q_u8(otmp, veorq_u8(pt, d0)); dd = (uint8x16_t)vaddq_u32((uint32x4_t)dd, one); break; } } } out += totalLen; _len = totalLen + len; if (likely(len >= 64)) { const uint32x4_t four = vshlq_n_u32(one, 2); uint8x16_t dd1 = (uint8x16_t)vaddq_u32((uint32x4_t)dd, one); uint8x16_t dd2 = (uint8x16_t)vaddq_u32((uint32x4_t)dd1, one); uint8x16_t dd3 = (uint8x16_t)vaddq_u32((uint32x4_t)dd2, one); for (;;) { len -= 64; uint8x16_t d0 = vrev32q_u8(dd); uint8x16_t d1 = vrev32q_u8(dd1); uint8x16_t d2 = vrev32q_u8(dd2); uint8x16_t d3 = vrev32q_u8(dd3); uint8x16_t pt0 = vld1q_u8(in); uint8x16_t pt1 = vld1q_u8(in + 16); uint8x16_t pt2 = vld1q_u8(in + 32); uint8x16_t pt3 = vld1q_u8(in + 48); d0 = vaesmcq_u8(vaeseq_u8(d0, k0)); d1 = vaesmcq_u8(vaeseq_u8(d1, k0)); d2 = vaesmcq_u8(vaeseq_u8(d2, k0)); d3 = vaesmcq_u8(vaeseq_u8(d3, k0)); d0 = vaesmcq_u8(vaeseq_u8(d0, k1)); d1 = vaesmcq_u8(vaeseq_u8(d1, k1)); d2 = vaesmcq_u8(vaeseq_u8(d2, k1)); d3 = vaesmcq_u8(vaeseq_u8(d3, k1)); d0 = vaesmcq_u8(vaeseq_u8(d0, k2)); d1 = vaesmcq_u8(vaeseq_u8(d1, k2)); d2 = vaesmcq_u8(vaeseq_u8(d2, k2)); d3 = vaesmcq_u8(vaeseq_u8(d3, k2)); d0 = vaesmcq_u8(vaeseq_u8(d0, k3)); d1 = vaesmcq_u8(vaeseq_u8(d1, k3)); d2 = vaesmcq_u8(vaeseq_u8(d2, k3)); d3 = vaesmcq_u8(vaeseq_u8(d3, k3)); d0 = vaesmcq_u8(vaeseq_u8(d0, k4)); d1 = vaesmcq_u8(vaeseq_u8(d1, k4)); d2 = vaesmcq_u8(vaeseq_u8(d2, k4)); d3 = vaesmcq_u8(vaeseq_u8(d3, k4)); d0 = vaesmcq_u8(vaeseq_u8(d0, k5)); d1 = vaesmcq_u8(vaeseq_u8(d1, k5)); d2 = vaesmcq_u8(vaeseq_u8(d2, k5)); d3 = vaesmcq_u8(vaeseq_u8(d3, k5)); d0 = vaesmcq_u8(vaeseq_u8(d0, k6)); d1 = vaesmcq_u8(vaeseq_u8(d1, k6)); d2 = vaesmcq_u8(vaeseq_u8(d2, k6)); d3 = vaesmcq_u8(vaeseq_u8(d3, k6)); d0 = vaesmcq_u8(vaeseq_u8(d0, k7)); d1 = vaesmcq_u8(vaeseq_u8(d1, k7)); d2 = vaesmcq_u8(vaeseq_u8(d2, k7)); d3 = vaesmcq_u8(vaeseq_u8(d3, k7)); d0 = vaesmcq_u8(vaeseq_u8(d0, k8)); d1 = vaesmcq_u8(vaeseq_u8(d1, k8)); d2 = vaesmcq_u8(vaeseq_u8(d2, k8)); d3 = vaesmcq_u8(vaeseq_u8(d3, k8)); d0 = vaesmcq_u8(vaeseq_u8(d0, k9)); d1 = vaesmcq_u8(vaeseq_u8(d1, k9)); d2 = vaesmcq_u8(vaeseq_u8(d2, k9)); d3 = vaesmcq_u8(vaeseq_u8(d3, k9)); d0 = vaesmcq_u8(vaeseq_u8(d0, k10)); d1 = vaesmcq_u8(vaeseq_u8(d1, k10)); d2 = vaesmcq_u8(vaeseq_u8(d2, k10)); d3 = vaesmcq_u8(vaeseq_u8(d3, k10)); d0 = vaesmcq_u8(vaeseq_u8(d0, k11)); d1 = vaesmcq_u8(vaeseq_u8(d1, k11)); d2 = vaesmcq_u8(vaeseq_u8(d2, k11)); d3 = vaesmcq_u8(vaeseq_u8(d3, k11)); d0 = vaesmcq_u8(vaeseq_u8(d0, k12)); d1 = vaesmcq_u8(vaeseq_u8(d1, k12)); d2 = vaesmcq_u8(vaeseq_u8(d2, k12)); d3 = vaesmcq_u8(vaeseq_u8(d3, k12)); d0 = veorq_u8(vaeseq_u8(d0, k13), k14); d1 = veorq_u8(vaeseq_u8(d1, k13), k14); d2 = veorq_u8(vaeseq_u8(d2, k13), k14); d3 = veorq_u8(vaeseq_u8(d3, k13), k14); d0 = veorq_u8(pt0, d0); d1 = veorq_u8(pt1, d1); d2 = veorq_u8(pt2, d2); d3 = veorq_u8(pt3, d3); vst1q_u8(out, d0); vst1q_u8(out + 16, d1); vst1q_u8(out + 32, d2); vst1q_u8(out + 48, d3); out += 64; in += 64; dd = (uint8x16_t)vaddq_u32((uint32x4_t)dd, four); if (unlikely(len < 64)) { break; } dd1 = (uint8x16_t)vaddq_u32((uint32x4_t)dd1, four); dd2 = (uint8x16_t)vaddq_u32((uint32x4_t)dd2, four); dd3 = (uint8x16_t)vaddq_u32((uint32x4_t)dd3, four); } } while (len >= 16) { len -= 16; uint8x16_t d0 = vrev32q_u8(dd); uint8x16_t pt = vld1q_u8(in); in += 16; dd = (uint8x16_t)vaddq_u32((uint32x4_t)dd, one); d0 = vaesmcq_u8(vaeseq_u8(d0, k0)); d0 = vaesmcq_u8(vaeseq_u8(d0, k1)); d0 = vaesmcq_u8(vaeseq_u8(d0, k2)); d0 = vaesmcq_u8(vaeseq_u8(d0, k3)); d0 = vaesmcq_u8(vaeseq_u8(d0, k4)); d0 = vaesmcq_u8(vaeseq_u8(d0, k5)); d0 = vaesmcq_u8(vaeseq_u8(d0, k6)); d0 = vaesmcq_u8(vaeseq_u8(d0, k7)); d0 = vaesmcq_u8(vaeseq_u8(d0, k8)); d0 = vaesmcq_u8(vaeseq_u8(d0, k9)); d0 = vaesmcq_u8(vaeseq_u8(d0, k10)); d0 = vaesmcq_u8(vaeseq_u8(d0, k11)); d0 = vaesmcq_u8(vaeseq_u8(d0, k12)); d0 = veorq_u8(vaeseq_u8(d0, k13), k14); vst1q_u8(out, veorq_u8(pt, d0)); out += 16; } // Any remaining input is placed in _out. This will be picked up and crypted // on subsequent calls to crypt() or finish() as it'll mean _len will not be // an even multiple of 16. for (unsigned int i = 0; i < len; ++i) { out[i] = in[i]; } vst1q_u8(reinterpret_cast(_ctr), vrev32q_u8(dd)); } #define ZT_INIT_ARMNEON_CRYPTO_SUBWORD(w) ((uint32_t)s_sbox[w & 0xffU] + ((uint32_t)s_sbox[(w >> 8U) & 0xffU] << 8U) + ((uint32_t)s_sbox[(w >> 16U) & 0xffU] << 16U) + ((uint32_t)s_sbox[(w >> 24U) & 0xffU] << 24U)) #define ZT_INIT_ARMNEON_CRYPTO_ROTWORD(w) (((w) << 8U) | ((w) >> 24U)) #define ZT_INIT_ARMNEON_CRYPTO_NK 8 #define ZT_INIT_ARMNEON_CRYPTO_NB 4 #define ZT_INIT_ARMNEON_CRYPTO_NR 14 void AES::p_init_armneon_crypto(const uint8_t *key) noexcept { static const uint8_t s_sbox[256] = {0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16}; uint64_t h[2]; uint32_t *const w = reinterpret_cast(p_k.neon.ek); for (unsigned int i=0;i(&(p_k.neon.h), h); p_k.neon.h = vrbitq_u8(p_k.neon.h); p_k.sw.h[0] = Utils::ntoh(h[0]); p_k.sw.h[1] = Utils::ntoh(h[1]); } void AES::p_encrypt_armneon_crypto(const void *const in, void *const out) const noexcept { uint8x16_t tmp = vld1q_u8(reinterpret_cast(in)); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[0])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[1])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[2])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[3])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[4])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[5])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[6])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[7])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[8])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[9])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[10])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[11])); tmp = vaesmcq_u8(vaeseq_u8(tmp, p_k.neon.ek[12])); tmp = veorq_u8(vaeseq_u8(tmp, p_k.neon.ek[13]), p_k.neon.ek[14]); vst1q_u8(reinterpret_cast(out), tmp); } void AES::p_decrypt_armneon_crypto(const void *const in, void *const out) const noexcept { uint8x16_t tmp = vld1q_u8(reinterpret_cast(in)); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[0])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[1])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[2])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[3])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[4])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[5])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[6])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[7])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[8])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[9])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[10])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[11])); tmp = vaesimcq_u8(vaesdq_u8(tmp, p_k.neon.dk[12])); tmp = veorq_u8(vaesdq_u8(tmp, p_k.neon.dk[13]), p_k.neon.dk[14]); vst1q_u8(reinterpret_cast(out), tmp); } } // namespace ZeroTier #endif // ZT_AES_NEON