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-rw-r--r--qa/rpc-tests/test_framework/siphash.py64
1 files changed, 64 insertions, 0 deletions
diff --git a/qa/rpc-tests/test_framework/siphash.py b/qa/rpc-tests/test_framework/siphash.py
new file mode 100644
index 0000000000..9c0574bd93
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+++ b/qa/rpc-tests/test_framework/siphash.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+# Copyright (c) 2016 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#
+# siphash.py - Specialized SipHash-2-4 implementations
+#
+# This implements SipHash-2-4 for 256-bit integers.
+
+def rotl64(n, b):
+ return n >> (64 - b) | (n & ((1 << (64 - b)) - 1)) << b
+
+def siphash_round(v0, v1, v2, v3):
+ v0 = (v0 + v1) & ((1 << 64) - 1)
+ v1 = rotl64(v1, 13)
+ v1 ^= v0
+ v0 = rotl64(v0, 32)
+ v2 = (v2 + v3) & ((1 << 64) - 1)
+ v3 = rotl64(v3, 16)
+ v3 ^= v2
+ v0 = (v0 + v3) & ((1 << 64) - 1)
+ v3 = rotl64(v3, 21)
+ v3 ^= v0
+ v2 = (v2 + v1) & ((1 << 64) - 1)
+ v1 = rotl64(v1, 17)
+ v1 ^= v2
+ v2 = rotl64(v2, 32)
+ return (v0, v1, v2, v3)
+
+def siphash256(k0, k1, h):
+ n0 = h & ((1 << 64) - 1)
+ n1 = (h >> 64) & ((1 << 64) - 1)
+ n2 = (h >> 128) & ((1 << 64) - 1)
+ n3 = (h >> 192) & ((1 << 64) - 1)
+ v0 = 0x736f6d6570736575 ^ k0
+ v1 = 0x646f72616e646f6d ^ k1
+ v2 = 0x6c7967656e657261 ^ k0
+ v3 = 0x7465646279746573 ^ k1 ^ n0
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0 ^= n0
+ v3 ^= n1
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0 ^= n1
+ v3 ^= n2
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0 ^= n2
+ v3 ^= n3
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0 ^= n3
+ v3 ^= 0x2000000000000000
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0 ^= 0x2000000000000000
+ v2 ^= 0xFF
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ v0, v1, v2, v3 = siphash_round(v0, v1, v2, v3)
+ return v0 ^ v1 ^ v2 ^ v3