Tidecoin's Falcon-512 c lib.

1. generate lib:
   make
2. use in your code as following:
   #include<stdio.h>
   #include<strings.h>
   #include"api.h"

main()
{

unsigned char sk[2048];
unsigned char pk[2048];
unsigned char m[32];
unsigned char sig[2048];
int sig_len;


memset(sk,0,sizeof(sk));
memset(pk,0,sizeof(pk));

int r = PQCLEAN_FALCON512_CLEAN_crypto_sign_keypair(pk,sk);
if(r==0){
    printf("Key pair gen ok.\n");
}

r = PQCLEAN_FALCON512_CLEAN_crypto_sign_signature(sig,&sig_len,m,32,sk);

if(r==0){
    printf("Signature is ok, the signature length is %d.\n",sig_len);
}

r = PQCLEAN_FALCON512_CLEAN_crypto_sign_verify(sig,sig_len,m,32,pk);

if(r==0){
    printf("Signature verification is ok.\n");
}

}
3. test:
gcc test.c -L . -lfalcon-512_clean
./a.out