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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <ecp/core.h>
#include <ecp/cr.h>
#include "util.h"
int ecp_util_read_key(int fd, ecp_ecdh_public_t *public, ecp_ecdh_private_t *private) {
char buffer[ECP_SIZE_ECDH_KEY_BUF];
ssize_t rv;
int _rv;
memset(buffer, 0, sizeof(buffer));
rv = read(fd, buffer, sizeof(buffer));
if (rv < (ECP_SIZE_ECDH_KEY_BUF - 1)) return ECP_ERR;
if (buffer[ECP_SIZE_ECDH_KEY_BUF - 1] == '\n') buffer[ECP_SIZE_ECDH_KEY_BUF - 1] = '\0';
_rv = ecp_str2key((uint8_t *)public, buffer);
if (_rv) return _rv;
if (private) {
memset(buffer, 0, sizeof(buffer));
rv = read(fd, buffer, sizeof(buffer));
if (rv < (ECP_SIZE_ECDH_KEY_BUF - 1)) return ECP_ERR;
if (buffer[ECP_SIZE_ECDH_KEY_BUF - 1] == '\n') buffer[ECP_SIZE_ECDH_KEY_BUF - 1] = '\0';
_rv = ecp_str2key((uint8_t *)private, buffer);
if (_rv) return _rv;
}
return ECP_OK;
}
int ecp_util_write_key(int fd, ecp_ecdh_public_t *public, ecp_ecdh_private_t *private) {
char buffer[ECP_SIZE_ECDH_KEY_BUF];
ssize_t rv;
ecp_key2str(buffer, (uint8_t *)public);
buffer[ECP_SIZE_ECDH_KEY_BUF - 1] = '\n';
rv = write(fd, buffer, sizeof(buffer));
if (rv != sizeof(buffer)) return ECP_ERR;
if (private) {
ecp_key2str(buffer, (uint8_t *)private);
buffer[ECP_SIZE_ECDH_KEY_BUF - 1] = '\n';
rv = write(fd, buffer, sizeof(buffer));
if (rv != sizeof(buffer)) return ECP_ERR;
}
return ECP_OK;
}
int ecp_util_load_key(char *filename, ecp_ecdh_public_t *public, ecp_ecdh_private_t *private) {
int rv, fd;
if ((fd = open(filename, O_RDONLY)) < 0) return ECP_ERR;
rv = ecp_util_read_key(fd, public, private);
close(fd);
return rv;
}
int ecp_util_save_key(char *filename, ecp_ecdh_public_t *public, ecp_ecdh_private_t *private) {
int rv, fd;
if ((fd = open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR)) < 0) return ECP_ERR;
rv = ecp_util_write_key(fd, public, private);
close(fd);
return rv;
}
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