api.h

#ifndef MQDSS_API_H
#define MQDSS_API_H

#include <stddef.h>
#include <stdint.h>

#include "params.h"

#define CRYPTO_ALGNAME "MQDSS"

#define CRYPTO_SECRETKEYBYTES SK_BYTES
#define CRYPTO_PUBLICKEYBYTES PK_BYTES
#define CRYPTO_BYTES SIG_LEN

/**
 * Returns an array containing a detached signature.
 */
int crypto_sign_signature(uint8_t *sig, size_t *siglen,
                          const uint8_t *m, size_t mlen, const uint8_t *sk);

/**
 * Forgery attack on MQDSS
 */
int crypto_sign_forge(uint8_t *sig, size_t *siglen,
                       const uint8_t *m, size_t mlen, const uint8_t *pk);
/**
 * Verifies a detached signature and message under a given public key.
 */
int crypto_sign_verify(const uint8_t *sig, size_t siglen,
                       const uint8_t *m, size_t mlen, const uint8_t *pk);

/*
 * Generates an MQDSS key pair.
 */
int crypto_sign_keypair(unsigned char *pk, unsigned char *sk);

/**
 * Takes a message m and its length mlen, writes the signature followed by
 * the message to sm and CRYPTO_BYTES + mlen to smlen.
 */
int crypto_sign(unsigned char *sm, unsigned long long *smlen,
                const unsigned char *m, unsigned long long mlen,
                const unsigned char *sk);

/**
 * Verifies a given signature-message pair under a given public key.
 * Expects m to have at least smlen bytes available (as is convention in the
 * SUPERCOP API).
 */
int crypto_sign_open(unsigned char *m, unsigned long long *mlen,
                     const unsigned char *sm, unsigned long long smlen,
                     const unsigned char *pk);

#endif