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/*
* ustream-ssl - library for SSL over ustream
*
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or 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 <string.h>
#include <libubox/ustream.h>
#include "ustream-ssl.h"
#include "ustream-internal.h"
#ifdef HAVE_CYASSL_VERSION_H
#include <cyassl/version.h>
#else
#define LIBCYASSL_VERSION_HEX 0
#endif
static int s_ustream_read(char *buf, int len, void *ctx)
{
struct ustream *s = ctx;
char *sbuf;
int slen;
if (s->eof)
return -3;
sbuf = ustream_get_read_buf(s, &slen);
if (slen > len)
slen = len;
if (!slen)
return -2;
memcpy(buf, sbuf, slen);
ustream_consume(s, slen);
return slen;
}
static int s_ustream_write(char *buf, int len, void *ctx)
{
struct ustream *s = ctx;
if (s->write_error)
return len;
return ustream_write(s, buf, len, false);
}
#if (LIBCYASSL_VERSION_HEX > 0)
static int io_recv_cb(SSL* ssl, char *buf, int sz, void *ctx)
{
return s_ustream_read(buf, sz, ctx);
}
static int io_send_cb(SSL* ssl, char *buf, int sz, void *ctx)
{
return s_ustream_write(buf, sz, ctx);
}
#else
/* not defined in the header file */
typedef int (*CallbackIORecv)(char *buf, int sz, void *ctx);
typedef int (*CallbackIOSend)(char *buf, int sz, void *ctx);
void SetCallbackIORecv_Ctx(SSL_CTX*, CallbackIORecv);
void SetCallbackIOSend_Ctx(SSL_CTX*, CallbackIOSend);
void SetCallbackIO_ReadCtx(SSL* ssl, void *rctx);
void SetCallbackIO_WriteCtx(SSL* ssl, void *wctx);
#define CyaSSL_SetIOReadCtx SetCallbackIO_ReadCtx
#define CyaSSL_SetIOWriteCtx SetCallbackIO_WriteCtx
#define CyaSSL_SetIORecv SetCallbackIORecv_Ctx
#define CyaSSL_SetIOSend SetCallbackIOSend_Ctx
static int io_recv_cb(char *buf, int sz, void *ctx)
{
return s_ustream_read(buf, sz, ctx);
}
static int io_send_cb(char *buf, int sz, void *ctx)
{
return s_ustream_write(buf, sz, ctx);
}
#endif
__hidden void ustream_set_io(struct ustream_ssl_ctx *ctx, void *ssl, struct ustream *conn)
{
CyaSSL_SetIOReadCtx(ssl, conn);
CyaSSL_SetIOWriteCtx(ssl, conn);
CyaSSL_SetIORecv((void *) ctx, io_recv_cb);
CyaSSL_SetIOSend((void *) ctx, io_send_cb);
}
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