Added AES+GHASH implementation using AES-NI opcodes; also ARM-Thumb assembly for...

[BearSSL] / src / symcipher / aes_x86ni_cbcenc.c

diff --git a/src/symcipher/aes_x86ni_cbcenc.c b/src/symcipher/aes_x86ni_cbcenc.c
new file mode 100644 (file)
index 0000000..f1c473e
--- /dev/null
+++ b/src/symcipher/aes_x86ni_cbcenc.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "inner.h"
+
+#if BR_AES_X86NI
+
+#if BR_AES_X86NI_GCC
+#include <wmmintrin.h>
+#endif
+
+#if BR_AES_X86NI_MSC
+#include <intrin.h>
+#endif
+
+/* see bearssl_block.h */
+void
+br_aes_x86ni_cbcenc_init(br_aes_x86ni_cbcenc_keys *ctx,
+       const void *key, size_t len)
+{
+       ctx->vtable = &br_aes_x86ni_cbcenc_vtable;
+       ctx->num_rounds = br_aes_x86ni_keysched_enc(ctx->skey.skni, key, len);
+}
+
+/* see bearssl_block.h */
+BR_TARGET("sse2,aes")
+void
+br_aes_x86ni_cbcenc_run(const br_aes_x86ni_cbcenc_keys *ctx,
+       void *iv, void *data, size_t len)
+{
+       unsigned char *buf;
+       unsigned num_rounds;
+       __m128i sk[15], ivx;
+       unsigned u;
+
+       buf = data;
+       ivx = _mm_loadu_si128(iv);
+       num_rounds = ctx->num_rounds;
+       for (u = 0; u <= num_rounds; u ++) {
+               sk[u] = _mm_loadu_si128((void *)(ctx->skey.skni + (u << 4)));
+       }
+       while (len > 0) {
+               __m128i x;
+
+               x = _mm_xor_si128(_mm_loadu_si128((void *)buf), ivx);
+               x = _mm_xor_si128(x, sk[0]);
+               x = _mm_aesenc_si128(x, sk[1]);
+               x = _mm_aesenc_si128(x, sk[2]);
+               x = _mm_aesenc_si128(x, sk[3]);
+               x = _mm_aesenc_si128(x, sk[4]);
+               x = _mm_aesenc_si128(x, sk[5]);
+               x = _mm_aesenc_si128(x, sk[6]);
+               x = _mm_aesenc_si128(x, sk[7]);
+               x = _mm_aesenc_si128(x, sk[8]);
+               x = _mm_aesenc_si128(x, sk[9]);
+               if (num_rounds == 10) {
+                       x = _mm_aesenclast_si128(x, sk[10]);
+               } else if (num_rounds == 12) {
+                       x = _mm_aesenc_si128(x, sk[10]);
+                       x = _mm_aesenc_si128(x, sk[11]);
+                       x = _mm_aesenclast_si128(x, sk[12]);
+               } else {
+                       x = _mm_aesenc_si128(x, sk[10]);
+                       x = _mm_aesenc_si128(x, sk[11]);
+                       x = _mm_aesenc_si128(x, sk[12]);
+                       x = _mm_aesenc_si128(x, sk[13]);
+                       x = _mm_aesenclast_si128(x, sk[14]);
+               }
+               ivx = x;
+               _mm_storeu_si128((void *)buf, x);
+               buf += 16;
+               len -= 16;
+       }
+       _mm_storeu_si128(iv, ivx);
+}
+
+/* see bearssl_block.h */
+const br_block_cbcenc_class br_aes_x86ni_cbcenc_vtable = {
+       sizeof(br_aes_x86ni_cbcenc_keys),
+       16,
+       4,
+       (void (*)(const br_block_cbcenc_class **, const void *, size_t))
+               &br_aes_x86ni_cbcenc_init,
+       (void (*)(const br_block_cbcenc_class *const *, void *, void *, size_t))
+               &br_aes_x86ni_cbcenc_run
+};
+
+/* see bearssl_block.h */
+const br_block_cbcenc_class *
+br_aes_x86ni_cbcenc_get_vtable(void)
+{
+       return br_aes_x86ni_supported() ? &br_aes_x86ni_cbcenc_vtable : NULL;
+}
+
+#else
+
+/* see bearssl_block.h */
+const br_block_cbcenc_class *
+br_aes_x86ni_cbcenc_get_vtable(void)
+{
+       return NULL;
+}
+
+#endif