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/*
* 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 <sys/socket.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <ressl.h>
#include "ressl_internal.h"
extern struct ressl_config ressl_config_default;
int
ressl_init(void)
{
static int ressl_initialised = 0;
if (ressl_initialised)
return (0);
SSL_load_error_strings();
SSL_library_init();
ressl_initialised = 1;
return (0);
}
const char *
ressl_error(struct ressl *ctx)
{
return ctx->errmsg;
}
int
ressl_set_error(struct ressl *ctx, char *fmt, ...)
{
va_list ap;
int rv;
ctx->err = errno;
free(ctx->errmsg);
ctx->errmsg = NULL;
va_start(ap, fmt);
rv = vasprintf(&ctx->errmsg, fmt, ap);
va_end(ap);
return (rv);
}
struct ressl *
ressl_new(struct ressl_config *config)
{
struct ressl *ctx;
if ((ctx = calloc(1, sizeof(*ctx))) == NULL)
return (NULL);
if (config == NULL)
config = &ressl_config_default;
ctx->config = config;
ressl_reset(ctx);
return (ctx);
}
void
ressl_free(struct ressl *ctx)
{
if (ctx == NULL)
return;
ressl_reset(ctx);
free(ctx);
}
void
ressl_reset(struct ressl *ctx)
{
/* SSL_free frees the SSL context. */
if (ctx->ssl_conn != NULL)
SSL_free(ctx->ssl_conn);
else
SSL_CTX_free(ctx->ssl_ctx);
ctx->ssl_conn = NULL;
ctx->ssl_ctx = NULL;
ctx->socket = -1;
ctx->err = 0;
free(ctx->errmsg);
ctx->errmsg = NULL;
}
int
ressl_read(struct ressl *ctx, char *buf, size_t buflen, size_t *outlen)
{
int ret;
/* XXX - handle async/non-blocking. */
ret = SSL_read(ctx->ssl_conn, buf, buflen);
if (ret <= 0) {
ret = SSL_get_error(ctx->ssl_conn, ret);
if (ret == SSL_ERROR_WANT_READ)
return (-2);
ressl_set_error(ctx, "read failed: %i", ret);
return (-1);
}
*outlen = (size_t)ret;
return (0);
}
int
ressl_write(struct ressl *ctx, const char *buf, size_t buflen, size_t *outlen)
{
int ret;
/* XXX - handle async/non-blocking. */
ret = SSL_write(ctx->ssl_conn, buf, buflen);
if (ret < 0) {
ressl_set_error(ctx, "write failed %d",
SSL_get_error(ctx->ssl_conn, ret));
return (-1);
}
*outlen = (size_t)ret;
return (0);
}
int
ressl_close(struct ressl *ctx)
{
/* XXX - handle case where multiple calls are required. */
if (ctx->ssl_conn != NULL) {
if (SSL_shutdown(ctx->ssl_conn) == -1) {
ressl_set_error(ctx, "SSL shutdown failed");
goto err;
}
}
if (ctx->socket != -1) {
if (shutdown(ctx->socket, SHUT_RDWR) != 0) {
ressl_set_error(ctx, "shutdown");
goto err;
}
if (close(ctx->socket) != 0) {
ressl_set_error(ctx, "close");
goto err;
}
ctx->socket = -1;
}
return (0);
err:
return (-1);
}
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