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-rw-r--r--src/vppinfra/crypto/aes_cbc.h549
1 files changed, 549 insertions, 0 deletions
diff --git a/src/vppinfra/crypto/aes_cbc.h b/src/vppinfra/crypto/aes_cbc.h
new file mode 100644
index 00000000000..5c3054f4a93
--- /dev/null
+++ b/src/vppinfra/crypto/aes_cbc.h
@@ -0,0 +1,549 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2023 Cisco Systems, Inc.
+ */
+
+#ifndef __crypto_aes_cbc_h__
+#define __crypto_aes_cbc_h__
+
+#include <vppinfra/clib.h>
+#include <vppinfra/vector.h>
+#include <vppinfra/crypto/aes.h>
+
+typedef struct
+{
+ const u8x16 encrypt_key[15];
+ const u8x16 decrypt_key[15];
+} aes_cbc_key_data_t;
+
+static_always_inline void
+clib_aes_cbc_encrypt (const aes_cbc_key_data_t *kd, const u8 *src, uword len,
+ const u8 *iv, aes_key_size_t ks, u8 *dst)
+{
+ int rounds = AES_KEY_ROUNDS (ks);
+ u8x16 r, *k = (u8x16 *) kd->encrypt_key;
+
+ r = *(u8x16u *) iv;
+
+ for (int i = 0; i < len; i += 16)
+ {
+ int j;
+#if __x86_64__
+ r = u8x16_xor3 (r, *(u8x16u *) (src + i), k[0]);
+ for (j = 1; j < rounds; j++)
+ r = aes_enc_round (r, k[j]);
+ r = aes_enc_last_round (r, k[rounds]);
+#else
+ r ^= *(u8x16u *) (src + i);
+ for (j = 1; j < rounds - 1; j++)
+ r = vaesmcq_u8 (vaeseq_u8 (r, k[j]));
+ r = vaeseq_u8 (r, k[j]) ^ k[rounds];
+#endif
+ *(u8x16u *) (dst + i) = r;
+ }
+}
+
+static_always_inline void
+clib_aes128_cbc_encrypt (const aes_cbc_key_data_t *kd, const u8 *plaintext,
+ uword len, const u8 *iv, u8 *ciphertext)
+{
+ clib_aes_cbc_encrypt (kd, plaintext, len, iv, AES_KEY_128, ciphertext);
+}
+
+static_always_inline void
+clib_aes192_cbc_encrypt (const aes_cbc_key_data_t *kd, const u8 *plaintext,
+ uword len, const u8 *iv, u8 *ciphertext)
+{
+ clib_aes_cbc_encrypt (kd, plaintext, len, iv, AES_KEY_192, ciphertext);
+}
+
+static_always_inline void
+clib_aes256_cbc_encrypt (const aes_cbc_key_data_t *kd, const u8 *plaintext,
+ uword len, const u8 *iv, u8 *ciphertext)
+{
+ clib_aes_cbc_encrypt (kd, plaintext, len, iv, AES_KEY_256, ciphertext);
+}
+
+static_always_inline void __clib_unused
+aes_cbc_dec (const u8x16 *k, u8x16u *src, u8x16u *dst, u8x16u *iv, int count,
+ int rounds)
+{
+ u8x16 r[4], c[4], f;
+
+ f = iv[0];
+ while (count >= 64)
+ {
+ c[0] = r[0] = src[0];
+ c[1] = r[1] = src[1];
+ c[2] = r[2] = src[2];
+ c[3] = r[3] = src[3];
+
+#if __x86_64__
+ r[0] ^= k[0];
+ r[1] ^= k[0];
+ r[2] ^= k[0];
+ r[3] ^= k[0];
+
+ for (int i = 1; i < rounds; i++)
+ {
+ r[0] = aes_dec_round (r[0], k[i]);
+ r[1] = aes_dec_round (r[1], k[i]);
+ r[2] = aes_dec_round (r[2], k[i]);
+ r[3] = aes_dec_round (r[3], k[i]);
+ }
+
+ r[0] = aes_dec_last_round (r[0], k[rounds]);
+ r[1] = aes_dec_last_round (r[1], k[rounds]);
+ r[2] = aes_dec_last_round (r[2], k[rounds]);
+ r[3] = aes_dec_last_round (r[3], k[rounds]);
+#else
+ for (int i = 0; i < rounds - 1; i++)
+ {
+ r[0] = vaesimcq_u8 (vaesdq_u8 (r[0], k[i]));
+ r[1] = vaesimcq_u8 (vaesdq_u8 (r[1], k[i]));
+ r[2] = vaesimcq_u8 (vaesdq_u8 (r[2], k[i]));
+ r[3] = vaesimcq_u8 (vaesdq_u8 (r[3], k[i]));
+ }
+ r[0] = vaesdq_u8 (r[0], k[rounds - 1]) ^ k[rounds];
+ r[1] = vaesdq_u8 (r[1], k[rounds - 1]) ^ k[rounds];
+ r[2] = vaesdq_u8 (r[2], k[rounds - 1]) ^ k[rounds];
+ r[3] = vaesdq_u8 (r[3], k[rounds - 1]) ^ k[rounds];
+#endif
+ dst[0] = r[0] ^ f;
+ dst[1] = r[1] ^ c[0];
+ dst[2] = r[2] ^ c[1];
+ dst[3] = r[3] ^ c[2];
+ f = c[3];
+
+ count -= 64;
+ src += 4;
+ dst += 4;
+ }
+
+ while (count > 0)
+ {
+ c[0] = r[0] = src[0];
+#if __x86_64__
+ r[0] ^= k[0];
+ for (int i = 1; i < rounds; i++)
+ r[0] = aes_dec_round (r[0], k[i]);
+ r[0] = aes_dec_last_round (r[0], k[rounds]);
+#else
+ c[0] = r[0] = src[0];
+ for (int i = 0; i < rounds - 1; i++)
+ r[0] = vaesimcq_u8 (vaesdq_u8 (r[0], k[i]));
+ r[0] = vaesdq_u8 (r[0], k[rounds - 1]) ^ k[rounds];
+#endif
+ dst[0] = r[0] ^ f;
+ f = c[0];
+
+ count -= 16;
+ src += 1;
+ dst += 1;
+ }
+}
+
+#if __x86_64__
+#if defined(__VAES__) && defined(__AVX512F__)
+
+static_always_inline u8x64
+aes_block_load_x4 (u8 *src[], int i)
+{
+ u8x64 r = {};
+ r = u8x64_insert_u8x16 (r, aes_block_load (src[0] + i), 0);
+ r = u8x64_insert_u8x16 (r, aes_block_load (src[1] + i), 1);
+ r = u8x64_insert_u8x16 (r, aes_block_load (src[2] + i), 2);
+ r = u8x64_insert_u8x16 (r, aes_block_load (src[3] + i), 3);
+ return r;
+}
+
+static_always_inline void
+aes_block_store_x4 (u8 *dst[], int i, u8x64 r)
+{
+ aes_block_store (dst[0] + i, u8x64_extract_u8x16 (r, 0));
+ aes_block_store (dst[1] + i, u8x64_extract_u8x16 (r, 1));
+ aes_block_store (dst[2] + i, u8x64_extract_u8x16 (r, 2));
+ aes_block_store (dst[3] + i, u8x64_extract_u8x16 (r, 3));
+}
+
+static_always_inline u8x64
+aes4_cbc_dec_permute (u8x64 a, u8x64 b)
+{
+ return (u8x64) u64x8_shuffle2 (a, b, 6, 7, 8, 9, 10, 11, 12, 13);
+}
+
+static_always_inline void
+aes4_cbc_dec (const u8x16 *k, u8x64u *src, u8x64u *dst, u8x16u *iv, int count,
+ aes_key_size_t rounds)
+{
+ u8x64 f, k4, r[4], c[4] = {};
+ __mmask8 m;
+ int i, n_blocks = count >> 4;
+
+ f = u8x64_insert_u8x16 (u8x64_zero (), *iv, 3);
+
+ while (n_blocks >= 16)
+ {
+ k4 = u8x64_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+ c[2] = src[2];
+ c[3] = src[3];
+
+ r[0] = c[0] ^ k4;
+ r[1] = c[1] ^ k4;
+ r[2] = c[2] ^ k4;
+ r[3] = c[3] ^ k4;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x4 (r[0], k4);
+ r[1] = aes_dec_round_x4 (r[1], k4);
+ r[2] = aes_dec_round_x4 (r[2], k4);
+ r[3] = aes_dec_round_x4 (r[3], k4);
+ }
+
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x4 (r[0], k4);
+ r[1] = aes_dec_last_round_x4 (r[1], k4);
+ r[2] = aes_dec_last_round_x4 (r[2], k4);
+ r[3] = aes_dec_last_round_x4 (r[3], k4);
+
+ dst[0] = r[0] ^= aes4_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes4_cbc_dec_permute (c[0], c[1]);
+ dst[2] = r[2] ^= aes4_cbc_dec_permute (c[1], c[2]);
+ dst[3] = r[3] ^= aes4_cbc_dec_permute (c[2], c[3]);
+ f = c[3];
+
+ n_blocks -= 16;
+ src += 4;
+ dst += 4;
+ }
+
+ if (n_blocks >= 12)
+ {
+ k4 = u8x64_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+ c[2] = src[2];
+
+ r[0] = c[0] ^ k4;
+ r[1] = c[1] ^ k4;
+ r[2] = c[2] ^ k4;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x4 (r[0], k4);
+ r[1] = aes_dec_round_x4 (r[1], k4);
+ r[2] = aes_dec_round_x4 (r[2], k4);
+ }
+
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x4 (r[0], k4);
+ r[1] = aes_dec_last_round_x4 (r[1], k4);
+ r[2] = aes_dec_last_round_x4 (r[2], k4);
+
+ dst[0] = r[0] ^= aes4_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes4_cbc_dec_permute (c[0], c[1]);
+ dst[2] = r[2] ^= aes4_cbc_dec_permute (c[1], c[2]);
+ f = c[2];
+
+ n_blocks -= 12;
+ src += 3;
+ dst += 3;
+ }
+ else if (n_blocks >= 8)
+ {
+ k4 = u8x64_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+
+ r[0] = c[0] ^ k4;
+ r[1] = c[1] ^ k4;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x4 (r[0], k4);
+ r[1] = aes_dec_round_x4 (r[1], k4);
+ }
+
+ k4 = u8x64_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x4 (r[0], k4);
+ r[1] = aes_dec_last_round_x4 (r[1], k4);
+
+ dst[0] = r[0] ^= aes4_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes4_cbc_dec_permute (c[0], c[1]);
+ f = c[1];
+
+ n_blocks -= 8;
+ src += 2;
+ dst += 2;
+ }
+ else if (n_blocks >= 4)
+ {
+ c[0] = src[0];
+
+ r[0] = c[0] ^ u8x64_splat_u8x16 (k[0]);
+
+ for (i = 1; i < rounds; i++)
+ r[0] = aes_dec_round_x4 (r[0], u8x64_splat_u8x16 (k[i]));
+
+ r[0] = aes_dec_last_round_x4 (r[0], u8x64_splat_u8x16 (k[i]));
+
+ dst[0] = r[0] ^= aes4_cbc_dec_permute (f, c[0]);
+ f = c[0];
+
+ n_blocks -= 4;
+ src += 1;
+ dst += 1;
+ }
+
+ if (n_blocks > 0)
+ {
+ k4 = u8x64_splat_u8x16 (k[0]);
+ m = (1 << (n_blocks * 2)) - 1;
+ c[0] =
+ (u8x64) _mm512_mask_loadu_epi64 ((__m512i) c[0], m, (__m512i *) src);
+ f = aes4_cbc_dec_permute (f, c[0]);
+ r[0] = c[0] ^ k4;
+ for (i = 1; i < rounds; i++)
+ r[0] = aes_dec_round_x4 (r[0], u8x64_splat_u8x16 (k[i]));
+ r[0] = aes_dec_last_round_x4 (r[0], u8x64_splat_u8x16 (k[i]));
+ _mm512_mask_storeu_epi64 ((__m512i *) dst, m, (__m512i) (r[0] ^ f));
+ }
+}
+#elif defined(__VAES__)
+
+static_always_inline u8x32
+aes_block_load_x2 (u8 *src[], int i)
+{
+ u8x32 r = {};
+ r = u8x32_insert_lo (r, aes_block_load (src[0] + i));
+ r = u8x32_insert_hi (r, aes_block_load (src[1] + i));
+ return r;
+}
+
+static_always_inline void
+aes_block_store_x2 (u8 *dst[], int i, u8x32 r)
+{
+ aes_block_store (dst[0] + i, u8x32_extract_lo (r));
+ aes_block_store (dst[1] + i, u8x32_extract_hi (r));
+}
+
+static_always_inline u8x32
+aes2_cbc_dec_permute (u8x32 a, u8x32 b)
+{
+ return (u8x32) u64x4_shuffle2 ((u64x4) a, (u64x4) b, 2, 3, 4, 5);
+}
+
+static_always_inline void
+aes2_cbc_dec (const u8x16 *k, u8x32u *src, u8x32u *dst, u8x16u *iv, int count,
+ aes_key_size_t rounds)
+{
+ u8x32 k2, f = {}, r[4], c[4] = {};
+ int i, n_blocks = count >> 4;
+
+ f = u8x32_insert_hi (f, *iv);
+
+ while (n_blocks >= 8)
+ {
+ k2 = u8x32_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+ c[2] = src[2];
+ c[3] = src[3];
+
+ r[0] = c[0] ^ k2;
+ r[1] = c[1] ^ k2;
+ r[2] = c[2] ^ k2;
+ r[3] = c[3] ^ k2;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x2 (r[0], k2);
+ r[1] = aes_dec_round_x2 (r[1], k2);
+ r[2] = aes_dec_round_x2 (r[2], k2);
+ r[3] = aes_dec_round_x2 (r[3], k2);
+ }
+
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x2 (r[0], k2);
+ r[1] = aes_dec_last_round_x2 (r[1], k2);
+ r[2] = aes_dec_last_round_x2 (r[2], k2);
+ r[3] = aes_dec_last_round_x2 (r[3], k2);
+
+ dst[0] = r[0] ^= aes2_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes2_cbc_dec_permute (c[0], c[1]);
+ dst[2] = r[2] ^= aes2_cbc_dec_permute (c[1], c[2]);
+ dst[3] = r[3] ^= aes2_cbc_dec_permute (c[2], c[3]);
+ f = c[3];
+
+ n_blocks -= 8;
+ src += 4;
+ dst += 4;
+ }
+
+ if (n_blocks >= 6)
+ {
+ k2 = u8x32_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+ c[2] = src[2];
+
+ r[0] = c[0] ^ k2;
+ r[1] = c[1] ^ k2;
+ r[2] = c[2] ^ k2;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x2 (r[0], k2);
+ r[1] = aes_dec_round_x2 (r[1], k2);
+ r[2] = aes_dec_round_x2 (r[2], k2);
+ }
+
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x2 (r[0], k2);
+ r[1] = aes_dec_last_round_x2 (r[1], k2);
+ r[2] = aes_dec_last_round_x2 (r[2], k2);
+
+ dst[0] = r[0] ^= aes2_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes2_cbc_dec_permute (c[0], c[1]);
+ dst[2] = r[2] ^= aes2_cbc_dec_permute (c[1], c[2]);
+ f = c[2];
+
+ n_blocks -= 6;
+ src += 3;
+ dst += 3;
+ }
+ else if (n_blocks >= 4)
+ {
+ k2 = u8x32_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ c[1] = src[1];
+
+ r[0] = c[0] ^ k2;
+ r[1] = c[1] ^ k2;
+
+ for (i = 1; i < rounds; i++)
+ {
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_round_x2 (r[0], k2);
+ r[1] = aes_dec_round_x2 (r[1], k2);
+ }
+
+ k2 = u8x32_splat_u8x16 (k[i]);
+ r[0] = aes_dec_last_round_x2 (r[0], k2);
+ r[1] = aes_dec_last_round_x2 (r[1], k2);
+
+ dst[0] = r[0] ^= aes2_cbc_dec_permute (f, c[0]);
+ dst[1] = r[1] ^= aes2_cbc_dec_permute (c[0], c[1]);
+ f = c[1];
+
+ n_blocks -= 4;
+ src += 2;
+ dst += 2;
+ }
+ else if (n_blocks >= 2)
+ {
+ k2 = u8x32_splat_u8x16 (k[0]);
+ c[0] = src[0];
+ r[0] = c[0] ^ k2;
+
+ for (i = 1; i < rounds; i++)
+ r[0] = aes_dec_round_x2 (r[0], u8x32_splat_u8x16 (k[i]));
+
+ r[0] = aes_dec_last_round_x2 (r[0], u8x32_splat_u8x16 (k[i]));
+ dst[0] = r[0] ^= aes2_cbc_dec_permute (f, c[0]);
+ f = c[0];
+
+ n_blocks -= 2;
+ src += 1;
+ dst += 1;
+ }
+
+ if (n_blocks > 0)
+ {
+ u8x16 rl = *(u8x16u *) src ^ k[0];
+ for (i = 1; i < rounds; i++)
+ rl = aes_dec_round (rl, k[i]);
+ rl = aes_dec_last_round (rl, k[i]);
+ *(u8x16 *) dst = rl ^ u8x32_extract_hi (f);
+ }
+}
+#endif
+#endif
+
+static_always_inline void
+clib_aes_cbc_key_expand (aes_cbc_key_data_t *kd, const u8 *key,
+ aes_key_size_t ks)
+{
+ u8x16 e[15], d[15];
+ aes_key_expand (e, key, ks);
+ aes_key_enc_to_dec (e, d, ks);
+ for (int i = 0; i < AES_KEY_ROUNDS (ks) + 1; i++)
+ {
+ ((u8x16 *) kd->decrypt_key)[i] = d[i];
+ ((u8x16 *) kd->encrypt_key)[i] = e[i];
+ }
+}
+
+static_always_inline void
+clib_aes128_cbc_key_expand (aes_cbc_key_data_t *kd, const u8 *key)
+{
+ clib_aes_cbc_key_expand (kd, key, AES_KEY_128);
+}
+static_always_inline void
+clib_aes192_cbc_key_expand (aes_cbc_key_data_t *kd, const u8 *key)
+{
+ clib_aes_cbc_key_expand (kd, key, AES_KEY_192);
+}
+static_always_inline void
+clib_aes256_cbc_key_expand (aes_cbc_key_data_t *kd, const u8 *key)
+{
+ clib_aes_cbc_key_expand (kd, key, AES_KEY_256);
+}
+
+static_always_inline void
+clib_aes_cbc_decrypt (const aes_cbc_key_data_t *kd, const u8 *ciphertext,
+ uword len, const u8 *iv, aes_key_size_t ks,
+ u8 *plaintext)
+{
+ int rounds = AES_KEY_ROUNDS (ks);
+#if defined(__VAES__) && defined(__AVX512F__)
+ aes4_cbc_dec (kd->decrypt_key, (u8x64u *) ciphertext, (u8x64u *) plaintext,
+ (u8x16u *) iv, (int) len, rounds);
+#elif defined(__VAES__)
+ aes2_cbc_dec (kd->decrypt_key, (u8x32u *) ciphertext, (u8x32u *) plaintext,
+ (u8x16u *) iv, (int) len, rounds);
+#else
+ aes_cbc_dec (kd->decrypt_key, (u8x16u *) ciphertext, (u8x16u *) plaintext,
+ (u8x16u *) iv, (int) len, rounds);
+#endif
+}
+
+static_always_inline void
+clib_aes128_cbc_decrypt (const aes_cbc_key_data_t *kd, const u8 *ciphertext,
+ uword len, const u8 *iv, u8 *plaintext)
+{
+ clib_aes_cbc_decrypt (kd, ciphertext, len, iv, AES_KEY_128, plaintext);
+}
+
+static_always_inline void
+clib_aes192_cbc_decrypt (const aes_cbc_key_data_t *kd, const u8 *ciphertext,
+ uword len, const u8 *iv, u8 *plaintext)
+{
+ clib_aes_cbc_decrypt (kd, ciphertext, len, iv, AES_KEY_192, plaintext);
+}
+
+static_always_inline void
+clib_aes256_cbc_decrypt (const aes_cbc_key_data_t *kd, const u8 *ciphertext,
+ uword len, const u8 *iv, u8 *plaintext)
+{
+ clib_aes_cbc_decrypt (kd, ciphertext, len, iv, AES_KEY_256, plaintext);
+}
+
+#endif /* __crypto_aes_cbc_h__ */