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/* $OpenBSD: tls_config.c,v 1.1 2014/10/31 13:46:17 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <stdlib.h>
#include <tls.h>
#include "tls_internal.h"
static int
set_string(const char **dest, const char *src)
{
free((char *)*dest);
*dest = NULL;
if (src != NULL)
if ((*dest = strdup(src)) == NULL)
return -1;
return 0;
}
static void *
memdup(const void *in, size_t len)
{
void *out;
if ((out = malloc(len)) == NULL)
return NULL;
memcpy(out, in, len);
return out;
}
static int
set_mem(char **dest, size_t *destlen, const void *src, size_t srclen)
{
free(*dest);
*dest = NULL;
*destlen = 0;
if (src != NULL)
if ((*dest = memdup(src, srclen)) == NULL)
return -1;
*destlen = srclen;
return 0;
}
struct tls_config *
tls_config_new(void)
{
struct tls_config *config;
if ((config = calloc(1, sizeof(*config))) == NULL)
return (NULL);
/*
* Default configuration.
*/
if (tls_config_set_ca_file(config, _PATH_SSL_CA_FILE) != 0) {
tls_config_free(config);
return (NULL);
}
tls_config_set_ecdhcurve(config, "auto");
tls_config_set_protocols(config, TLS_PROTOCOLS_DEFAULT);
tls_config_set_verify_depth(config, 6);
tls_config_verify(config);
return (config);
}
void
tls_config_free(struct tls_config *config)
{
if (config == NULL)
return;
tls_config_clear_keys(config);
free((char *)config->ca_file);
free((char *)config->ca_path);
free((char *)config->cert_file);
free(config->cert_mem);
free((char *)config->ciphers);
free((char *)config->key_file);
free(config->key_mem);
free(config);
}
void
tls_config_clear_keys(struct tls_config *config)
{
tls_config_set_cert_mem(config, NULL, 0);
tls_config_set_key_mem(config, NULL, 0);
}
int
tls_config_set_ca_file(struct tls_config *config, const char *ca_file)
{
return set_string(&config->ca_file, ca_file);
}
int
tls_config_set_ca_path(struct tls_config *config, const char *ca_path)
{
return set_string(&config->ca_path, ca_path);
}
int
tls_config_set_cert_file(struct tls_config *config, const char *cert_file)
{
return set_string(&config->cert_file, cert_file);
}
int
tls_config_set_cert_mem(struct tls_config *config, const uint8_t *cert,
size_t len)
{
return set_mem(&config->cert_mem, &config->cert_len, cert, len);
}
int
tls_config_set_ciphers(struct tls_config *config, const char *ciphers)
{
return set_string(&config->ciphers, ciphers);
}
int
tls_config_set_ecdhcurve(struct tls_config *config, const char *name)
{
int nid;
if (name == NULL)
nid = NID_undef;
else if (strcasecmp(name, "auto") == 0)
nid = -1;
else if ((nid = OBJ_txt2nid(name)) == NID_undef)
return (-1);
config->ecdhcurve = nid;
return (0);
}
int
tls_config_set_key_file(struct tls_config *config, const char *key_file)
{
return set_string(&config->key_file, key_file);
}
int
tls_config_set_key_mem(struct tls_config *config, const uint8_t *key,
size_t len)
{
if (config->key_mem)
explicit_bzero(config->key_mem, config->key_len);
return set_mem(&config->key_mem, &config->key_len, key, len);
}
void
tls_config_set_protocols(struct tls_config *config, uint32_t protocols)
{
config->protocols = protocols;
}
void
tls_config_set_verify_depth(struct tls_config *config, int verify_depth)
{
config->verify_depth = verify_depth;
}
void
tls_config_insecure_noverifyhost(struct tls_config *config)
{
config->verify_host = 0;
}
void
tls_config_insecure_noverifycert(struct tls_config *config)
{
config->verify_cert = 0;
}
void
tls_config_verify(struct tls_config *config)
{
config->verify_host = 1;
config->verify_cert = 1;
}
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