initial version of SQIsign

Co-authored-by: Jorge Chavez-Saab <jorgechavezsaab@gmail.com>
Co-authored-by: Maria Corte-Real Santos <36373796+mariascrs@users.noreply.github.com>
Co-authored-by: Luca De Feo <github@defeo.lu>
Co-authored-by: Jonathan Komada Eriksen <jonathan.eriksen97@gmail.com>
Co-authored-by: Basil Hess <bhe@zurich.ibm.com>
Co-authored-by: Antonin Leroux <18654258+tonioecto@users.noreply.github.com>
Co-authored-by: Patrick Longa <plonga@microsoft.com>
Co-authored-by: Lorenz Panny <lorenz@yx7.cc>
Co-authored-by: Francisco Rodríguez-Henríquez <francisco.rodriguez@tii.ae>
Co-authored-by: Sina Schaeffler <108983332+syndrakon@users.noreply.github.com>
Co-authored-by: Benjamin Wesolowski <19474926+Calodeon@users.noreply.github.com>

src/nistapi/lvl5/api.h

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#ifndef api_h
+#define api_h
+
+#define CRYPTO_SECRETKEYBYTES 1509
+#define CRYPTO_PUBLICKEYBYTES  128
+#define CRYPTO_BYTES           335
+
+#define CRYPTO_ALGNAME "lvl5"
+
+int
+crypto_sign_keypair(unsigned char *pk, unsigned char *sk);
+
+int
+crypto_sign(unsigned char *sm, unsigned long long *smlen,
+            const unsigned char *m, unsigned long long mlen,
+            const unsigned char *sk);
+
+int
+crypto_sign_open(unsigned char *m, unsigned long long *mlen,
+                 const unsigned char *sm, unsigned long long smlen,
+                 const unsigned char *pk);
+
+#endif /* api_h */