From 7d08e39a87f5805d1ef764aa0fd986490fb4f7bb Mon Sep 17 00:00:00 2001
From: Damjan Marion <damarion@cisco.com>
Date: Tue, 28 Jan 2020 09:55:25 +0100
Subject: crypto-native: rename crypto_ia32 to crypto_native

Type: refactor

Change-Id: I9f21b3bf669ff913ff50afe5459cf52ff987e701
Signed-off-by: Damjan Marion <damarion@cisco.com>
---
 src/plugins/crypto_native/aes.h | 226 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 226 insertions(+)
 create mode 100644 src/plugins/crypto_native/aes.h

(limited to 'src/plugins/crypto_native/aes.h')

diff --git a/src/plugins/crypto_native/aes.h b/src/plugins/crypto_native/aes.h
new file mode 100644
index 00000000000..d0923913034
--- /dev/null
+++ b/src/plugins/crypto_native/aes.h
@@ -0,0 +1,226 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2019 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:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#ifndef __aesni_h__
+#define __aesni_h__
+
+typedef enum
+{
+  AES_KEY_128 = 0,
+  AES_KEY_192 = 1,
+  AES_KEY_256 = 2,
+} aes_key_size_t;
+
+#define AES_KEY_ROUNDS(x)		(10 + x * 2)
+#define AES_KEY_BYTES(x)		(16 + x * 8)
+
+
+/* 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)
+{
+  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);
+}
+
+static_always_inline void
+aes128_key_expand (__m128i * k, u8 * key)
+{
+  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));
+}
+
+static_always_inline void
+aes192_key_assist (__m128i * r1, __m128i * r2, __m128i * r3)
+{
+  __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);
+}
+
+static_always_inline void
+aes192_key_expand (__m128i * k, u8 * key)
+{
+  __m128i r1, r2, r3;
+
+  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] = r3;
+  r2 = _mm_aeskeygenassist_si128 (r3, 0x1);
+  aes192_key_assist (&r1, &r2, &r3);
+  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[3] = r1;
+
+  k[4] = r3;
+  r2 = _mm_aeskeygenassist_si128 (r3, 0x4);
+  aes192_key_assist (&r1, &r2, &r3);
+  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[6] = r1;
+
+  k[7] = r3;
+  r2 = _mm_aeskeygenassist_si128 (r3, 0x10);
+  aes192_key_assist (&r1, &r2, &r3);
+  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[9] = r1;
+
+  k[10] = r3;
+  r2 = _mm_aeskeygenassist_si128 (r3, 0x40);
+  aes192_key_assist (&r1, &r2, &r3);
+  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[12] = r1;
+}
+
+static_always_inline void
+aes256_key_assist1 (__m128i * r1, __m128i * r2)
+{
+  __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);
+}
+
+static_always_inline void
+aes256_key_assist2 (__m128i r1, __m128i * r3)
+{
+  __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);
+}
+
+static_always_inline void
+aes256_key_expand (__m128i * k, u8 * key)
+{
+  __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;
+}
+
+static_always_inline void
+aes_key_expand (__m128i * k, u8 * key, aes_key_size_t ks)
+{
+  switch (ks)
+    {
+    case AES_KEY_128:
+      aes128_key_expand (k, key);
+      break;
+    case AES_KEY_192:
+      aes192_key_expand (k, key);
+      break;
+    case AES_KEY_256:
+      aes256_key_expand (k, key);
+      break;
+    }
+}
+
+
+static_always_inline void
+aes_key_enc_to_dec (__m128i * k, aes_key_size_t ks)
+{
+  int rounds = AES_KEY_ROUNDS (ks);
+  __m128i r;
+
+  r = k[rounds];
+  k[rounds] = k[0];
+  k[0] = r;
+
+  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);
+    }
+
+  k[rounds / 2] = _mm_aesimc_si128 (k[rounds / 2]);
+}
+
+#endif /* __aesni_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
-- 
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