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diff --git a/lib/liboqs/src/common/sha3/xkcp_low/KeccakP-1600/plain-64bits/KeccakP-1600-SnP.h b/lib/liboqs/src/common/sha3/xkcp_low/KeccakP-1600/plain-64bits/KeccakP-1600-SnP.h
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+++ b/lib/liboqs/src/common/sha3/xkcp_low/KeccakP-1600/plain-64bits/KeccakP-1600-SnP.h
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+/*
+The eXtended Keccak Code Package (XKCP)
+https://github.com/XKCP/XKCP
+
+The Keccak-p permutations, designed by Guido Bertoni, Joan Daemen, Michaël Peeters and Gilles Van Assche.
+
+Implementation by Gilles Van Assche and Ronny Van Keer, hereby denoted as "the implementer".
+
+For more information, feedback or questions, please refer to the Keccak Team website:
+https://keccak.team/
+
+To the extent possible under law, the implementer has waived all copyright
+and related or neighboring rights to the source code in this file.
+http://creativecommons.org/publicdomain/zero/1.0/
+
+---
+
+Please refer to SnP-documentation.h for more details.
+*/
+
+#ifndef _KeccakP_1600_SnP_h_
+#define _KeccakP_1600_SnP_h_
+
+#include "brg_endian.h"
+#include "KeccakP-1600-opt64-config.h"
+
+#include <stddef.h>
+
+#define KeccakP1600_implementation_plain64 "generic 64-bit optimized implementation (" KeccakP1600_implementation_config ")"
+#define KeccakP1600_stateSizeInBytes_plain64 200
+#define KeccakP1600_stateAlignment_plain64 8
+#define KeccakF1600_FastLoop_supported_plain64
+#define KeccakP1600_12rounds_FastLoop_supported_plain64
+
+#if defined(ADD_SYMBOL_SUFFIX)
+#define KECCAK_SYMBOL_SUFFIX plain64
+#define KECCAK_IMPL_NAMESPACE(x) x##_plain64
+#else
+#define KECCAK_IMPL_NAMESPACE(x) x
+#define KeccakP1600_implementation KeccakP1600_implementation_plain64
+#define KeccakP1600_stateSizeInBytes KeccakP1600_stateSizeInBytes_plain64
+#define KeccakP1600_stateAlignment KeccakP1600_stateAlignment_plain64
+#define KeccakF1600_FastLoop_supported KeccakF1600_FastLoop_supported_plain64
+#define KeccakP1600_12rounds_FastLoop_supported KeccakP1600_12rounds_FastLoop_supported_plain64
+#endif
+
+#define KeccakP1600_StaticInitialize KECCAK_IMPL_NAMESPACE(KeccakP1600_StaticInitialize)
+void KeccakP1600_StaticInitialize(void);
+
+#define KeccakP1600_Initialize KECCAK_IMPL_NAMESPACE(KeccakP1600_Initialize)
+void KeccakP1600_Initialize(void *state);
+
+#define KeccakP1600_AddByte KECCAK_IMPL_NAMESPACE(KeccakP1600_AddByte)
+void KeccakP1600_AddByte(void *state, unsigned char data, unsigned int offset);
+
+#define KeccakP1600_AddBytes KECCAK_IMPL_NAMESPACE(KeccakP1600_AddBytes)
+void KeccakP1600_AddBytes(void *state, const unsigned char *data, unsigned int offset, unsigned int length);
+
+#define KeccakP1600_OverwriteBytes KECCAK_IMPL_NAMESPACE(KeccakP1600_OverwriteBytes)
+void KeccakP1600_OverwriteBytes(void *state, const unsigned char *data, unsigned int offset, unsigned int length);
+
+#define KeccakP1600_OverwriteWithZeroes KECCAK_IMPL_NAMESPACE(KeccakP1600_OverwriteWithZeroes)
+void KeccakP1600_OverwriteWithZeroes(void *state, unsigned int byteCount);
+
+#define KeccakP1600_Permute_Nrounds KECCAK_IMPL_NAMESPACE(KeccakP1600_Permute_Nrounds)
+void KeccakP1600_Permute_Nrounds(void *state, unsigned int nrounds);
+
+#define KeccakP1600_Permute_12rounds KECCAK_IMPL_NAMESPACE(KeccakP1600_Permute_12rounds)
+void KeccakP1600_Permute_12rounds(void *state);
+
+#define KeccakP1600_Permute_24rounds KECCAK_IMPL_NAMESPACE(KeccakP1600_Permute_24rounds)
+void KeccakP1600_Permute_24rounds(void *state);
+
+#define KeccakP1600_ExtractBytes KECCAK_IMPL_NAMESPACE(KeccakP1600_ExtractBytes)
+void KeccakP1600_ExtractBytes(const void *state, unsigned char *data, unsigned int offset, unsigned int length);
+
+#define KeccakP1600_ExtractAndAddBytes KECCAK_IMPL_NAMESPACE(KeccakP1600_ExtractAndAddBytes)
+void KeccakP1600_ExtractAndAddBytes(const void *state, const unsigned char *input, unsigned char *output, unsigned int offset, unsigned int length);
+
+#define KeccakF1600_FastLoop_Absorb KECCAK_IMPL_NAMESPACE(KeccakF1600_FastLoop_Absorb)
+size_t KeccakF1600_FastLoop_Absorb(void *state, unsigned int laneCount, const unsigned char *data, size_t dataByteLen);
+
+#define KeccakP1600_12rounds_FastLoop_Absorb KECCAK_IMPL_NAMESPACE(KeccakP1600_12rounds_FastLoop_Absorb)
+size_t KeccakP1600_12rounds_FastLoop_Absorb(void *state, unsigned int laneCount, const unsigned char *data, size_t dataByteLen);
+
+#endif