From eebc23218758d89bce0b7cb0eced9fd654cd3d15 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Wed, 8 Jun 2016 15:49:27 +0200
Subject: [PATCH] test: Add more test vectors for siphash

Add full test vectors from spec, test per byte and per 8 bytes.

Builds on #8086.
---
 src/test/hash_tests.cpp | 48 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/src/test/hash_tests.cpp b/src/test/hash_tests.cpp
index f62080c1d..82d61209b 100644
--- a/src/test/hash_tests.cpp
+++ b/src/test/hash_tests.cpp
@@ -47,6 +47,38 @@ BOOST_AUTO_TEST_CASE(murmurhash3)
 #undef T
 }
 
+/*
+   SipHash-2-4 output with
+   k = 00 01 02 ...
+   and
+   in = (empty string)
+   in = 00 (1 byte)
+   in = 00 01 (2 bytes)
+   in = 00 01 02 (3 bytes)
+   ...
+   in = 00 01 02 ... 3e (63 bytes)
+
+   from: https://131002.net/siphash/siphash24.c
+*/
+uint64_t siphash_4_2_testvec[] = {
+    0x726fdb47dd0e0e31, 0x74f839c593dc67fd, 0x0d6c8009d9a94f5a, 0x85676696d7fb7e2d,
+    0xcf2794e0277187b7, 0x18765564cd99a68d, 0xcbc9466e58fee3ce, 0xab0200f58b01d137,
+    0x93f5f5799a932462, 0x9e0082df0ba9e4b0, 0x7a5dbbc594ddb9f3, 0xf4b32f46226bada7,
+    0x751e8fbc860ee5fb, 0x14ea5627c0843d90, 0xf723ca908e7af2ee, 0xa129ca6149be45e5,
+    0x3f2acc7f57c29bdb, 0x699ae9f52cbe4794, 0x4bc1b3f0968dd39c, 0xbb6dc91da77961bd,
+    0xbed65cf21aa2ee98, 0xd0f2cbb02e3b67c7, 0x93536795e3a33e88, 0xa80c038ccd5ccec8,
+    0xb8ad50c6f649af94, 0xbce192de8a85b8ea, 0x17d835b85bbb15f3, 0x2f2e6163076bcfad,
+    0xde4daaaca71dc9a5, 0xa6a2506687956571, 0xad87a3535c49ef28, 0x32d892fad841c342,
+    0x7127512f72f27cce, 0xa7f32346f95978e3, 0x12e0b01abb051238, 0x15e034d40fa197ae,
+    0x314dffbe0815a3b4, 0x027990f029623981, 0xcadcd4e59ef40c4d, 0x9abfd8766a33735c,
+    0x0e3ea96b5304a7d0, 0xad0c42d6fc585992, 0x187306c89bc215a9, 0xd4a60abcf3792b95,
+    0xf935451de4f21df2, 0xa9538f0419755787, 0xdb9acddff56ca510, 0xd06c98cd5c0975eb,
+    0xe612a3cb9ecba951, 0xc766e62cfcadaf96, 0xee64435a9752fe72, 0xa192d576b245165a,
+    0x0a8787bf8ecb74b2, 0x81b3e73d20b49b6f, 0x7fa8220ba3b2ecea, 0x245731c13ca42499,
+    0xb78dbfaf3a8d83bd, 0xea1ad565322a1a0b, 0x60e61c23a3795013, 0x6606d7e446282b93,
+    0x6ca4ecb15c5f91e1, 0x9f626da15c9625f3, 0xe51b38608ef25f57, 0x958a324ceb064572
+};
+
 BOOST_AUTO_TEST_CASE(siphash)
 {
     CSipHasher hasher(0x0706050403020100ULL, 0x0F0E0D0C0B0A0908ULL);
@@ -74,6 +106,22 @@ BOOST_AUTO_TEST_CASE(siphash)
     BOOST_CHECK_EQUAL(hasher.Finalize(),  0xe612a3cb9ecba951ull);
 
     BOOST_CHECK_EQUAL(SipHashUint256(0x0706050403020100ULL, 0x0F0E0D0C0B0A0908ULL, uint256S("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100")), 0x7127512f72f27cceull);
+
+    // Check test vectors from spec, one byte at a time
+    CSipHasher hasher2(0x0706050403020100ULL, 0x0F0E0D0C0B0A0908ULL);
+    for (uint8_t x=0; x<ARRAYLEN(siphash_4_2_testvec); ++x)
+    {
+        BOOST_CHECK_EQUAL(hasher2.Finalize(), siphash_4_2_testvec[x]);
+        hasher2.Write(&x, 1);
+    }
+    // Check test vectors from spec, eight bytes at a time
+    CSipHasher hasher3(0x0706050403020100ULL, 0x0F0E0D0C0B0A0908ULL);
+    for (uint8_t x=0; x<ARRAYLEN(siphash_4_2_testvec); x+=8)
+    {
+        BOOST_CHECK_EQUAL(hasher3.Finalize(), siphash_4_2_testvec[x]);
+        hasher3.Write(uint64_t(x)|(uint64_t(x+1)<<8)|(uint64_t(x+2)<<16)|(uint64_t(x+3)<<24)|
+                     (uint64_t(x+4)<<32)|(uint64_t(x+5)<<40)|(uint64_t(x+6)<<48)|(uint64_t(x+7)<<56));
+    }
 }
 
 BOOST_AUTO_TEST_SUITE_END()