/*
*------------------------------------------------------------------
- * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
#define AES_KEY_ROUNDS(x) (10 + x * 2)
#define AES_KEY_BYTES(x) (16 + x * 8)
+#ifdef __x86_64__
+
+static_always_inline u8x16
+aes_block_load (u8 * p)
+{
+ return (u8x16) _mm_loadu_si128 ((__m128i *) p);
+}
+
+static_always_inline u8x16
+aes_enc_round (u8x16 a, u8x16 k)
+{
+ return (u8x16) _mm_aesenc_si128 ((__m128i) a, (__m128i) k);
+}
+
+static_always_inline u8x16
+aes_enc_last_round (u8x16 a, u8x16 k)
+{
+ return (u8x16) _mm_aesenclast_si128 ((__m128i) a, (__m128i) k);
+}
+
+static_always_inline u8x16
+aes_dec_round (u8x16 a, u8x16 k)
+{
+ return (u8x16) _mm_aesdec_si128 ((__m128i) a, (__m128i) k);
+}
+
+static_always_inline u8x16
+aes_dec_last_round (u8x16 a, u8x16 k)
+{
+ return (u8x16) _mm_aesdeclast_si128 ((__m128i) a, (__m128i) k);
+}
+
+static_always_inline void
+aes_block_store (u8 * p, u8x16 r)
+{
+ _mm_storeu_si128 ((__m128i *) p, (__m128i) r);
+}
+
+static_always_inline u8x16
+aes_inv_mix_column (u8x16 a)
+{
+ return (u8x16) _mm_aesimc_si128 ((__m128i) a);
+}
/* AES-NI based AES key expansion based on code samples from
Intel(r) Advanced Encryption Standard (AES) New Instructions White Paper
(323641-001) */
-static_always_inline __m128i
-aes128_key_assist (__m128i r1, __m128i r2)
+static_always_inline void
+aes128_key_assist (__m128i * k, __m128i r)
{
- r1 ^= _mm_slli_si128 (r1, 4);
- r1 ^= _mm_slli_si128 (r1, 4);
- r1 ^= _mm_slli_si128 (r1, 4);
- return r1 ^ _mm_shuffle_epi32 (r2, 0xff);
+ __m128i t = k[-1];
+ t ^= _mm_slli_si128 (t, 4);
+ t ^= _mm_slli_si128 (t, 4);
+ t ^= _mm_slli_si128 (t, 4);
+ k[0] = t ^ _mm_shuffle_epi32 (r, 0xff);
}
static_always_inline void
-aes128_key_expand (__m128i * k, u8 * key)
+aes128_key_expand (u8x16 * key_schedule, u8 * key)
{
+ __m128i *k = (__m128i *) key_schedule;
k[0] = _mm_loadu_si128 ((const __m128i *) key);
- k[1] = aes128_key_assist (k[0], _mm_aeskeygenassist_si128 (k[0], 0x01));
- k[2] = aes128_key_assist (k[1], _mm_aeskeygenassist_si128 (k[1], 0x02));
- k[3] = aes128_key_assist (k[2], _mm_aeskeygenassist_si128 (k[2], 0x04));
- k[4] = aes128_key_assist (k[3], _mm_aeskeygenassist_si128 (k[3], 0x08));
- k[5] = aes128_key_assist (k[4], _mm_aeskeygenassist_si128 (k[4], 0x10));
- k[6] = aes128_key_assist (k[5], _mm_aeskeygenassist_si128 (k[5], 0x20));
- k[7] = aes128_key_assist (k[6], _mm_aeskeygenassist_si128 (k[6], 0x40));
- k[8] = aes128_key_assist (k[7], _mm_aeskeygenassist_si128 (k[7], 0x80));
- k[9] = aes128_key_assist (k[8], _mm_aeskeygenassist_si128 (k[8], 0x1b));
- k[10] = aes128_key_assist (k[9], _mm_aeskeygenassist_si128 (k[9], 0x36));
+ aes128_key_assist (k + 1, _mm_aeskeygenassist_si128 (k[0], 0x01));
+ aes128_key_assist (k + 2, _mm_aeskeygenassist_si128 (k[1], 0x02));
+ aes128_key_assist (k + 3, _mm_aeskeygenassist_si128 (k[2], 0x04));
+ aes128_key_assist (k + 4, _mm_aeskeygenassist_si128 (k[3], 0x08));
+ aes128_key_assist (k + 5, _mm_aeskeygenassist_si128 (k[4], 0x10));
+ aes128_key_assist (k + 6, _mm_aeskeygenassist_si128 (k[5], 0x20));
+ aes128_key_assist (k + 7, _mm_aeskeygenassist_si128 (k[6], 0x40));
+ aes128_key_assist (k + 8, _mm_aeskeygenassist_si128 (k[7], 0x80));
+ aes128_key_assist (k + 9, _mm_aeskeygenassist_si128 (k[8], 0x1b));
+ aes128_key_assist (k + 10, _mm_aeskeygenassist_si128 (k[9], 0x36));
}
static_always_inline void
-aes192_key_assist (__m128i * r1, __m128i * r2, __m128i * r3)
+aes192_key_assist (__m128i * r1, __m128i * r2, __m128i key_assist)
{
- __m128i r;
- *r1 ^= r = _mm_slli_si128 (*r1, 0x4);
- *r1 ^= r = _mm_slli_si128 (r, 0x4);
- *r1 ^= _mm_slli_si128 (r, 0x4);
- *r1 ^= _mm_shuffle_epi32 (*r2, 0x55);
- *r3 ^= _mm_slli_si128 (*r3, 0x4);
- *r3 ^= *r2 = _mm_shuffle_epi32 (*r1, 0xff);
+ __m128i t;
+ *r1 ^= t = _mm_slli_si128 (*r1, 0x4);
+ *r1 ^= t = _mm_slli_si128 (t, 0x4);
+ *r1 ^= _mm_slli_si128 (t, 0x4);
+ *r1 ^= _mm_shuffle_epi32 (key_assist, 0x55);
+ *r2 ^= _mm_slli_si128 (*r2, 0x4);
+ *r2 ^= _mm_shuffle_epi32 (*r1, 0xff);
}
static_always_inline void
-aes192_key_expand (__m128i * k, u8 * key)
+aes192_key_expand (u8x16 * key_schedule, u8 * key)
{
- __m128i r1, r2, r3;
+ __m128i r1, r2, *k = (__m128i *) key_schedule;
k[0] = r1 = _mm_loadu_si128 ((__m128i *) key);
/* load the 24-bytes key as 2 * 16-bytes (and ignore last 8-bytes) */
- r3 = CLIB_MEM_OVERFLOW_LOAD (_mm_loadu_si128, (__m128i *) (key + 16));
+ k[1] = r2 = CLIB_MEM_OVERFLOW_LOAD (_mm_loadu_si128, (__m128i *) key + 1);
- k[1] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x1);
- aes192_key_assist (&r1, &r2, &r3);
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x1));
k[1] = (__m128i) _mm_shuffle_pd ((__m128d) k[1], (__m128d) r1, 0);
- k[2] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r3, 1);
- r2 = _mm_aeskeygenassist_si128 (r3, 0x2);
- aes192_key_assist (&r1, &r2, &r3);
+ k[2] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r2, 1);
+
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x2));
k[3] = r1;
+ k[4] = r2;
- k[4] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x4);
- aes192_key_assist (&r1, &r2, &r3);
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x4));
k[4] = (__m128i) _mm_shuffle_pd ((__m128d) k[4], (__m128d) r1, 0);
- k[5] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r3, 1);
- r2 = _mm_aeskeygenassist_si128 (r3, 0x8);
- aes192_key_assist (&r1, &r2, &r3);
+ k[5] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r2, 1);
+
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x8));
k[6] = r1;
+ k[7] = r2;
- k[7] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x10);
- aes192_key_assist (&r1, &r2, &r3);
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x10));
k[7] = (__m128i) _mm_shuffle_pd ((__m128d) k[7], (__m128d) r1, 0);
- k[8] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r3, 1);
- r2 = _mm_aeskeygenassist_si128 (r3, 0x20);
- aes192_key_assist (&r1, &r2, &r3);
+ k[8] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r2, 1);
+
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x20));
k[9] = r1;
+ k[10] = r2;
- k[10] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x40);
- aes192_key_assist (&r1, &r2, &r3);
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x40));
k[10] = (__m128i) _mm_shuffle_pd ((__m128d) k[10], (__m128d) r1, 0);
- k[11] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r3, 1);
- r2 = _mm_aeskeygenassist_si128 (r3, 0x80);
- aes192_key_assist (&r1, &r2, &r3);
+ k[11] = (__m128i) _mm_shuffle_pd ((__m128d) r1, (__m128d) r2, 1);
+
+ aes192_key_assist (&r1, &r2, _mm_aeskeygenassist_si128 (r2, 0x80));
k[12] = r1;
}
static_always_inline void
-aes256_key_assist1 (__m128i * r1, __m128i * r2)
+aes256_key_assist (__m128i * k, int i, __m128i key_assist)
{
- __m128i r;
- *r1 ^= r = _mm_slli_si128 (*r1, 0x4);
- *r1 ^= r = _mm_slli_si128 (r, 0x4);
- *r1 ^= _mm_slli_si128 (r, 0x4);
- *r1 ^= *r2 = _mm_shuffle_epi32 (*r2, 0xff);
+ __m128i r, t;
+ k += i;
+ r = k[-2];
+ r ^= t = _mm_slli_si128 (r, 0x4);
+ r ^= t = _mm_slli_si128 (t, 0x4);
+ r ^= _mm_slli_si128 (t, 0x4);
+ r ^= _mm_shuffle_epi32 (key_assist, 0xff);
+ k[0] = r;
+
+ if (i >= 14)
+ return;
+
+ r = k[-1];
+ r ^= t = _mm_slli_si128 (r, 0x4);
+ r ^= t = _mm_slli_si128 (t, 0x4);
+ r ^= _mm_slli_si128 (t, 0x4);
+ r ^= _mm_shuffle_epi32 (_mm_aeskeygenassist_si128 (k[0], 0x0), 0xaa);
+ k[1] = r;
}
static_always_inline void
-aes256_key_assist2 (__m128i r1, __m128i * r3)
+aes256_key_expand (u8x16 * key_schedule, u8 * key)
{
- __m128i r;
- *r3 ^= r = _mm_slli_si128 (*r3, 0x4);
- *r3 ^= r = _mm_slli_si128 (r, 0x4);
- *r3 ^= _mm_slli_si128 (r, 0x4);
- *r3 ^= _mm_shuffle_epi32 (_mm_aeskeygenassist_si128 (r1, 0x0), 0xaa);
+ __m128i *k = (__m128i *) key_schedule;
+ k[0] = _mm_loadu_si128 ((__m128i *) key);
+ k[1] = _mm_loadu_si128 ((__m128i *) (key + 16));
+ aes256_key_assist (k, 2, _mm_aeskeygenassist_si128 (k[1], 0x01));
+ aes256_key_assist (k, 4, _mm_aeskeygenassist_si128 (k[3], 0x02));
+ aes256_key_assist (k, 6, _mm_aeskeygenassist_si128 (k[5], 0x04));
+ aes256_key_assist (k, 8, _mm_aeskeygenassist_si128 (k[7], 0x08));
+ aes256_key_assist (k, 10, _mm_aeskeygenassist_si128 (k[9], 0x10));
+ aes256_key_assist (k, 12, _mm_aeskeygenassist_si128 (k[11], 0x20));
+ aes256_key_assist (k, 14, _mm_aeskeygenassist_si128 (k[13], 0x40));
}
+#endif
-static_always_inline void
-aes256_key_expand (__m128i * k, u8 * key)
+#ifdef __aarch64__
+
+static_always_inline u8x16
+aes_inv_mix_column (u8x16 a)
{
- __m128i r1, r2, r3;
- k[0] = r1 = _mm_loadu_si128 ((__m128i *) key);
- k[1] = r3 = _mm_loadu_si128 ((__m128i *) (key + 16));
- r2 = _mm_aeskeygenassist_si128 (k[1], 0x01);
- aes256_key_assist1 (&r1, &r2);
- k[2] = r1;
- aes256_key_assist2 (r1, &r3);
- k[3] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x02);
- aes256_key_assist1 (&r1, &r2);
- k[4] = r1;
- aes256_key_assist2 (r1, &r3);
- k[5] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x04);
- aes256_key_assist1 (&r1, &r2);
- k[6] = r1;
- aes256_key_assist2 (r1, &r3);
- k[7] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x08);
- aes256_key_assist1 (&r1, &r2);
- k[8] = r1;
- aes256_key_assist2 (r1, &r3);
- k[9] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x10);
- aes256_key_assist1 (&r1, &r2);
- k[10] = r1;
- aes256_key_assist2 (r1, &r3);
- k[11] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x20);
- aes256_key_assist1 (&r1, &r2);
- k[12] = r1;
- aes256_key_assist2 (r1, &r3);
- k[13] = r3;
- r2 = _mm_aeskeygenassist_si128 (r3, 0x40);
- aes256_key_assist1 (&r1, &r2);
- k[14] = r1;
+ return vaesimcq_u8 (a);
+}
+
+static const u8x16 aese_prep_mask1 =
+ { 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15, 12 };
+static const u8x16 aese_prep_mask2 =
+ { 12, 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15, 12, 13, 14, 15 };
+
+static inline void
+aes128_key_expand_round_neon (u8x16 * rk, u32 rcon)
+{
+ u8x16 r, t, last_round = rk[-1], z = { };
+ r = vqtbl1q_u8 (last_round, aese_prep_mask1);
+ r = vaeseq_u8 (r, z);
+ r ^= (u8x16) vdupq_n_u32 (rcon);
+ r ^= last_round;
+ r ^= t = vextq_u8 (z, last_round, 12);
+ r ^= t = vextq_u8 (z, t, 12);
+ r ^= vextq_u8 (z, t, 12);
+ rk[0] = r;
+}
+
+void
+aes128_key_expand (u8x16 * rk, const u8 * k)
+{
+ rk[0] = vld1q_u8 (k);
+ aes128_key_expand_round_neon (rk + 1, 0x01);
+ aes128_key_expand_round_neon (rk + 2, 0x02);
+ aes128_key_expand_round_neon (rk + 3, 0x04);
+ aes128_key_expand_round_neon (rk + 4, 0x08);
+ aes128_key_expand_round_neon (rk + 5, 0x10);
+ aes128_key_expand_round_neon (rk + 6, 0x20);
+ aes128_key_expand_round_neon (rk + 7, 0x40);
+ aes128_key_expand_round_neon (rk + 8, 0x80);
+ aes128_key_expand_round_neon (rk + 9, 0x1b);
+ aes128_key_expand_round_neon (rk + 10, 0x36);
+}
+
+static inline void
+aes192_key_expand_round_neon (u8x8 * rk, u32 rcon)
+{
+ u8x8 r, last_round = rk[-1], z = { };
+ u8x16 r2, z2 = { };
+
+ r2 = (u8x16) vdupq_lane_u64 ((uint64x1_t) last_round, 0);
+ r2 = vqtbl1q_u8 (r2, aese_prep_mask1);
+ r2 = vaeseq_u8 (r2, z2);
+ r2 ^= (u8x16) vdupq_n_u32 (rcon);
+
+ r = (u8x8) vdup_laneq_u64 ((u64x2) r2, 0);
+ r ^= rk[-3];
+ r ^= vext_u8 (z, rk[-3], 4);
+ rk[0] = r;
+
+ r = rk[-2] ^ vext_u8 (r, z, 4);
+ r ^= vext_u8 (z, r, 4);
+ rk[1] = r;
+
+ if (rcon == 0x80)
+ return;
+
+ r = rk[-1] ^ vext_u8 (r, z, 4);
+ r ^= vext_u8 (z, r, 4);
+ rk[2] = r;
+}
+
+void
+aes192_key_expand (u8x16 * ek, const u8 * k)
+{
+ u8x8 *rk = (u8x8 *) ek;
+ ek[0] = vld1q_u8 (k);
+ rk[2] = vld1_u8 (k + 16);
+ aes192_key_expand_round_neon (rk + 3, 0x01);
+ aes192_key_expand_round_neon (rk + 6, 0x02);
+ aes192_key_expand_round_neon (rk + 9, 0x04);
+ aes192_key_expand_round_neon (rk + 12, 0x08);
+ aes192_key_expand_round_neon (rk + 15, 0x10);
+ aes192_key_expand_round_neon (rk + 18, 0x20);
+ aes192_key_expand_round_neon (rk + 21, 0x40);
+ aes192_key_expand_round_neon (rk + 24, 0x80);
+}
+
+
+static inline void
+aes256_key_expand_round_neon (u8x16 * rk, u32 rcon)
+{
+ u8x16 r, t, z = { };
+
+ r = vqtbl1q_u8 (rk[-1], rcon ? aese_prep_mask1 : aese_prep_mask2);
+ r = vaeseq_u8 (r, z);
+ if (rcon)
+ r ^= (u8x16) vdupq_n_u32 (rcon);
+ r ^= rk[-2];
+ r ^= t = vextq_u8 (z, rk[-2], 12);
+ r ^= t = vextq_u8 (z, t, 12);
+ r ^= vextq_u8 (z, t, 12);
+ rk[0] = r;
+}
+
+void
+aes256_key_expand (u8x16 * rk, const u8 * k)
+{
+ rk[0] = vld1q_u8 (k);
+ rk[1] = vld1q_u8 (k + 16);
+ aes256_key_expand_round_neon (rk + 2, 0x01);
+ aes256_key_expand_round_neon (rk + 3, 0);
+ aes256_key_expand_round_neon (rk + 4, 0x02);
+ aes256_key_expand_round_neon (rk + 5, 0);
+ aes256_key_expand_round_neon (rk + 6, 0x04);
+ aes256_key_expand_round_neon (rk + 7, 0);
+ aes256_key_expand_round_neon (rk + 8, 0x08);
+ aes256_key_expand_round_neon (rk + 9, 0);
+ aes256_key_expand_round_neon (rk + 10, 0x10);
+ aes256_key_expand_round_neon (rk + 11, 0);
+ aes256_key_expand_round_neon (rk + 12, 0x20);
+ aes256_key_expand_round_neon (rk + 13, 0);
+ aes256_key_expand_round_neon (rk + 14, 0x40);
}
+#endif
+
static_always_inline void
-aes_key_expand (__m128i * k, u8 * key, aes_key_size_t ks)
+aes_key_expand (u8x16 * key_schedule, u8 * key, aes_key_size_t ks)
{
switch (ks)
{
case AES_KEY_128:
- aes128_key_expand (k, key);
+ aes128_key_expand (key_schedule, key);
break;
case AES_KEY_192:
- aes192_key_expand (k, key);
+ aes192_key_expand (key_schedule, key);
break;
case AES_KEY_256:
- aes256_key_expand (k, key);
+ aes256_key_expand (key_schedule, key);
break;
}
}
-
static_always_inline void
-aes_key_enc_to_dec (__m128i * k, aes_key_size_t ks)
+aes_key_enc_to_dec (u8x16 * ke, u8x16 * kd, aes_key_size_t ks)
{
int rounds = AES_KEY_ROUNDS (ks);
- __m128i r;
- r = k[rounds];
- k[rounds] = k[0];
- k[0] = r;
+ kd[rounds] = ke[0];
+ kd[0] = ke[rounds];
for (int i = 1; i < (rounds / 2); i++)
{
- r = k[rounds - i];
- k[rounds - i] = _mm_aesimc_si128 (k[i]);
- k[i] = _mm_aesimc_si128 (r);
+ kd[rounds - i] = aes_inv_mix_column (ke[i]);
+ kd[i] = aes_inv_mix_column (ke[rounds - i]);
}
- k[rounds / 2] = _mm_aesimc_si128 (k[rounds / 2]);
+ kd[rounds / 2] = aes_inv_mix_column (ke[rounds / 2]);
}
#endif /* __aesni_h__ */
Code Review / vpp.git / blobdiff