chore: checkpoint before Python removal

vendor/aws-lc-sys/aws-lc/crypto/siphash/siphash.c

@@ -0,0 +1,75 @@
+// Copyright (c) 2019, Google Inc.
+// SPDX-License-Identifier: ISC
+
+#include <stdint.h>
+#include <string.h>
+
+#include <openssl/siphash.h>
+
+#include "../internal.h"
+
+
+static void siphash_round(uint64_t v[4]) {
+  v[0] += v[1];
+  v[2] += v[3];
+  v[1] = CRYPTO_rotl_u64(v[1], 13);
+  v[3] = CRYPTO_rotl_u64(v[3], 16);
+  v[1] ^= v[0];
+  v[3] ^= v[2];
+  v[0] = CRYPTO_rotl_u64(v[0], 32);
+  v[2] += v[1];
+  v[0] += v[3];
+  v[1] = CRYPTO_rotl_u64(v[1], 17);
+  v[3] = CRYPTO_rotl_u64(v[3], 21);
+  v[1] ^= v[2];
+  v[3] ^= v[0];
+  v[2] = CRYPTO_rotl_u64(v[2], 32);
+}
+
+uint64_t SIPHASH_24(const uint64_t key[2], const uint8_t *input,
+                    size_t input_len) {
+  const size_t orig_input_len = input_len;
+
+  uint64_t v[4], k0, k1;
+#ifdef OPENSSL_BIG_ENDIAN
+  k0 = CRYPTO_bswap8(key[0]);
+  k1 = CRYPTO_bswap8(key[1]);
+#else
+  k0 = key[0];
+  k1 = key[1];
+#endif
+  v[0] = k0 ^ UINT64_C(0x736f6d6570736575);
+  v[1] = k1 ^ UINT64_C(0x646f72616e646f6d);
+  v[2] = k0 ^ UINT64_C(0x6c7967656e657261);
+  v[3] = k1 ^ UINT64_C(0x7465646279746573);
+
+  while (input_len >= sizeof(uint64_t)) {
+    uint64_t m = CRYPTO_load_u64_le(input);
+    v[3] ^= m;
+    siphash_round(v);
+    siphash_round(v);
+    v[0] ^= m;
+
+    input += sizeof(uint64_t);
+    input_len -= sizeof(uint64_t);
+  }
+
+  uint8_t last_block[8];
+  OPENSSL_memset(last_block, 0, sizeof(last_block));
+  OPENSSL_memcpy(last_block, input, input_len);
+  last_block[7] = orig_input_len & 0xff;
+
+  uint64_t last_block_word = CRYPTO_load_u64_le(last_block);
+  v[3] ^= last_block_word;
+  siphash_round(v);
+  siphash_round(v);
+  v[0] ^= last_block_word;
+
+  v[2] ^= 0xff;
+  siphash_round(v);
+  siphash_round(v);
+  siphash_round(v);
+  siphash_round(v);
+
+  return v[0] ^ v[1] ^ v[2] ^ v[3];
+}

vendor/aws-lc-sys/aws-lc/crypto/siphash/siphash_test.cc

@@ -0,0 +1,46 @@
+// Copyright (c) 2019, Google Inc.
+// SPDX-License-Identifier: ISC
+
+#include <stdint.h>
+
+#include <gtest/gtest.h>
+
+#include <openssl/siphash.h>
+
+#include "../test/file_test.h"
+#include "../test/test_util.h"
+
+TEST(SipHash, Basic) {
+  // This is the example from appendix A of the SipHash paper.
+  uint8_t key_bytes[16];
+  for (unsigned i = 0; i < 16; i++) {
+    key_bytes[i] = i;
+  }
+  uint64_t key[2];
+  memcpy(key, key_bytes, sizeof(key));
+
+  uint8_t input[15];
+  for (unsigned i = 0; i < sizeof(input); i++) {
+    input[i] = i;
+  }
+
+  EXPECT_EQ(UINT64_C(0xa129ca6149be45e5),
+            SIPHASH_24(key, input, sizeof(input)));
+}
+
+TEST(SipHash, Vectors) {
+  FileTestGTest("crypto/siphash/siphash_tests.txt", [](FileTest *t) {
+    std::vector<uint8_t> key, msg, hash_bytes;
+    ASSERT_TRUE(t->GetBytes(&key, "KEY"));
+    ASSERT_TRUE(t->GetBytes(&msg, "IN"));
+    ASSERT_TRUE(t->GetBytes(&hash_bytes, "HASH"));
+    ASSERT_EQ(16u, key.size());
+    ASSERT_EQ(8u, hash_bytes.size());
+    uint64_t hash = CRYPTO_load_u64_le(hash_bytes.data());
+
+    uint64_t key_words[2];
+    memcpy(key_words, key.data(), key.size());
+    uint64_t result = SIPHASH_24(key_words, msg.data(), msg.size());
+    EXPECT_EQ(result, hash);
+  });
+}