license, copyright: add headers.

In downstream projects, files may be copied and moved around. This makes it difficult to track the copyrights and licenses without having them stored in each file. License and copyright holders for files without specific header is assumed to be the one in LICENSE and AUTHORS.md files respectively. There might be an issue in avx2/f1600x4.S. It is derived from the code at sphincs/sphincsplus#14 but there is no copyright information in that PR and the code is said to be generated by PeachPy but there is no source code associated.
adrien-n · Dec 11, 2024 · 8975f79 · 8975f79
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diff --git a/avx2/align.h b/avx2/align.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef ALIGN_H
 #define ALIGN_H
 

diff --git a/avx2/api.h b/avx2/api.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef API_H
 #define API_H
 

diff --git a/avx2/config.h b/avx2/config.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef CONFIG_H
 #define CONFIG_H
 

diff --git a/avx2/consts.c b/avx2/consts.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "consts.h"

diff --git a/avx2/consts.h b/avx2/consts.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef CONSTS_H
 #define CONSTS_H
 

diff --git a/avx2/fips202.h b/avx2/fips202.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef FIPS202_H
 #define FIPS202_H
 

diff --git a/avx2/fips202x4.c b/avx2/fips202x4.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stddef.h>
 #include <stdint.h>
 #include <immintrin.h>

diff --git a/avx2/fips202x4.h b/avx2/fips202x4.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef FIPS202X4_H
 #define FIPS202X4_H
 

diff --git a/avx2/invntt.S b/avx2/invntt.S
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include "consts.h"
 .include "shuffle.inc"
 

diff --git a/avx2/ntt.S b/avx2/ntt.S
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include "consts.h"
 .include "shuffle.inc"
 

diff --git a/avx2/ntt.h b/avx2/ntt.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef NTT_H
 #define NTT_H
 

diff --git a/avx2/pointwise.S b/avx2/pointwise.S
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include "params.h"
 #include "consts.h"
 

diff --git a/avx2/poly.c b/avx2/poly.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include <immintrin.h>
 #include <string.h>

diff --git a/avx2/poly.h b/avx2/poly.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef POLY_H
 #define POLY_H
 

diff --git a/avx2/polyvec.c b/avx2/polyvec.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "polyvec.h"

diff --git a/avx2/polyvec.h b/avx2/polyvec.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef POLYVEC_H
 #define POLYVEC_H
 

diff --git a/avx2/rejsample.c b/avx2/rejsample.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include <immintrin.h>
 #include "params.h"

diff --git a/avx2/rejsample.h b/avx2/rejsample.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef REJSAMPLE_H
 #define REJSAMPLE_H
 

diff --git a/avx2/rounding.c b/avx2/rounding.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include <immintrin.h>
 #include <string.h>

diff --git a/avx2/rounding.h b/avx2/rounding.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef ROUNDING_H
 #define ROUNDING_H
 

diff --git a/avx2/shuffle.S b/avx2/shuffle.S
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include "consts.h"
 .include "shuffle.inc"
 

diff --git a/avx2/shuffle.inc b/avx2/shuffle.inc
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 .macro shuffle8 r0,r1,r2,r3
 vperm2i128	$0x20,%ymm\r1,%ymm\r0,%ymm\r2
 vperm2i128	$0x31,%ymm\r1,%ymm\r0,%ymm\r3

diff --git a/avx2/sign.c b/avx2/sign.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include <string.h>
 #include "align.h"

diff --git a/avx2/symmetric.h b/avx2/symmetric.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef SYMMETRIC_H
 #define SYMMETRIC_H
 

diff --git a/avx2/test/test_vectors.c b/avx2/test/test_vectors.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdlib.h>
 #include <stdint.h>
 #include <stdio.h>

diff --git a/ref/api.h b/ref/api.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef API_H
 #define API_H
 

diff --git a/ref/config.h b/ref/config.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef CONFIG_H
 #define CONFIG_H
 

diff --git a/ref/fips202.c b/ref/fips202.c
@@ -1,3 +1,9 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé,
+ *            Ronny Van Keer (crypto_hash/keccakc512/simple/ from http://bench.cr.yp.to/supercop.html),
+ *            Gilles Van Assche, Daniel J. Bernstein, Peter Schwabe (TweetFips202)
+ * */
+
 /* Based on the public domain implementation in crypto_hash/keccakc512/simple/ from
  * http://bench.cr.yp.to/supercop.html by Ronny Van Keer and the public domain "TweetFips202"
  * implementation from https://twitter.com/tweetfips202 by Gilles Van Assche, Daniel J. Bernstein,

diff --git a/ref/fips202.h b/ref/fips202.h
@@ -1,3 +1,9 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé,
+ *            Ronny Van Keer (crypto_hash/keccakc512/simple/ from http://bench.cr.yp.to/supercop.html),
+ *            Gilles Van Assche, Daniel J. Bernstein, Peter Schwabe (TweetFips202)
+ * */
+
 #ifndef FIPS202_H
 #define FIPS202_H
 

diff --git a/ref/ntt.c b/ref/ntt.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "ntt.h"

diff --git a/ref/ntt.h b/ref/ntt.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef NTT_H
 #define NTT_H
 

diff --git a/ref/packing.c b/ref/packing.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include "params.h"
 #include "packing.h"
 #include "polyvec.h"

diff --git a/ref/packing.h b/ref/packing.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef PACKING_H
 #define PACKING_H
 

diff --git a/ref/params.h b/ref/params.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef PARAMS_H
 #define PARAMS_H
 

diff --git a/ref/poly.c b/ref/poly.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "poly.h"

diff --git a/ref/poly.h b/ref/poly.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef POLY_H
 #define POLY_H
 

diff --git a/ref/polyvec.c b/ref/polyvec.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "polyvec.h"

diff --git a/ref/polyvec.h b/ref/polyvec.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef POLYVEC_H
 #define POLYVEC_H
 

diff --git a/ref/precomp.gp b/ref/precomp.gp
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 precomp() = {
   brv = [128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240, 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248, 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244, 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252, 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254, 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241, 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249, 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245, 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247, 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255];
 

diff --git a/ref/randombytes.c b/ref/randombytes.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>

diff --git a/ref/randombytes.h b/ref/randombytes.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef RANDOMBYTES_H
 #define RANDOMBYTES_H
 

diff --git a/ref/reduce.c b/ref/reduce.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "reduce.h"

diff --git a/ref/reduce.h b/ref/reduce.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef REDUCE_H
 #define REDUCE_H
 

diff --git a/ref/rounding.c b/ref/rounding.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "rounding.h"

diff --git a/ref/rounding.h b/ref/rounding.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef ROUNDING_H
 #define ROUNDING_H
 

diff --git a/ref/sign.c b/ref/sign.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "sign.h"

diff --git a/ref/sign.h b/ref/sign.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef SIGN_H
 #define SIGN_H
 

diff --git a/ref/symmetric-shake.c b/ref/symmetric-shake.c
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #include <stdint.h>
 #include "params.h"
 #include "symmetric.h"

diff --git a/ref/symmetric.h b/ref/symmetric.h
@@ -1,3 +1,7 @@
+/* SPDX-License-Identifier: Apache-2.0 OR CC0-1.0
+ * Copyright: Léo Ducas, Eike Kiltz, Tancrède Lepoint, Vadim Lyubashevsky, Gregor Seiler, Peter Schwabe, Damien Stehlé
+ * */
+
 #ifndef SYMMETRIC_H
 #define SYMMETRIC_H