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#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <stdio.h>
#include "rnd.h"
#include "die.h"
#include "str.h"
#include "crypto.h"
#include "ioops.h"
#include "config.h"
#include "keypair.h"
void generate_keypair(void)
{
struct passwd *pw = getpwuid(getuid());
unsigned char publickey[crypto_box_pub_key_size];
unsigned char secretkey[crypto_box_sec_key_size];
char file[128];
xmemset(publickey, 0, sizeof(publickey));
xmemset(secretkey, 0, sizeof(secretkey));
printf("Reading from %s (this may take a while) ...\n",
HIG_ENTROPY_SOURCE);
gen_key_bytes(secretkey, sizeof(secretkey));
crypto_scalarmult_curve25519_base(publickey, secretkey);
slprintf(file, sizeof(file), "%s/%s", pw->pw_dir, FILE_PUBKEY);
write_blob_or_die(file, publickey, sizeof(publickey));
printf("Public key written to %s!\n", file);
slprintf(file, sizeof(file), "%s/%s", pw->pw_dir, FILE_PRIVKEY);
write_blob_or_die(file, secretkey, sizeof(secretkey));
printf("Secret key written to %s!\n", file);
xmemset(publickey, 0, sizeof(publickey));
xmemset(secretkey, 0, sizeof(secretkey));
}
void verify_keypair(void)
{
int result;
struct passwd *pw = getpwuid(getuid());
unsigned char publickey[crypto_box_pub_key_size];
unsigned char publicres[crypto_box_pub_key_size];
unsigned char secretkey[crypto_box_sec_key_size];
char file[128];
xmemset(publickey, 0, sizeof(publickey));
xmemset(publicres, 0, sizeof(publicres));
xmemset(secretkey, 0, sizeof(secretkey));
slprintf(file, sizeof(file), "%s/%s", pw->pw_dir, FILE_PUBKEY);
read_blob_or_die(file, publickey, sizeof(publickey));
slprintf(file, sizeof(file), "%s/%s", pw->pw_dir, FILE_PRIVKEY);
read_blob_or_die(file, secretkey, sizeof(secretkey));
crypto_scalarmult_curve25519_base(publicres, secretkey);
result = crypto_verify_32(publicres, publickey);
xmemset(publickey, 0, sizeof(publickey));
xmemset(publicres, 0, sizeof(publicres));
xmemset(secretkey, 0, sizeof(secretkey));
if (result)
panic("Keypair is corrupt! You need to regenerate!\n");
}
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