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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 "openssl_bio_compat.h"
#include "ustream-internal.h"
static int
s_ustream_new(BIO *b)
{
BIO_set_init(b, 1);
BIO_set_data(b, NULL);
BIO_clear_flags(b, ~0);
return 1;
}
static int
s_ustream_free(BIO *b)
{
if (!b)
return 0;
BIO_set_data(b, NULL);
BIO_set_init(b, 0);
BIO_clear_flags(b, ~0);
return 1;
}
static int
s_ustream_read(BIO *b, char *buf, int len)
{
struct bio_ctx *ctx;
char *sbuf;
int slen;
if (!buf || len <= 0)
return 0;
ctx = (struct bio_ctx *)BIO_get_data(b);
if (!ctx || !ctx->stream)
return 0;
sbuf = ustream_get_read_buf(ctx->stream, &slen);
BIO_clear_retry_flags(b);
if (!slen) {
BIO_set_retry_read(b);
return -1;
}
if (slen > len)
slen = len;
memcpy(buf, sbuf, slen);
ustream_consume(ctx->stream, slen);
return slen;
}
static int
s_ustream_write(BIO *b, const char *buf, int len)
{
struct bio_ctx *ctx;
if (!buf || len <= 0)
return 0;
ctx = (struct bio_ctx *)BIO_get_data(b);
if (!ctx || !ctx->stream)
return 0;
if (ctx->stream->write_error)
return len;
return ustream_write(ctx->stream, buf, len, false);
}
static int
s_ustream_gets(BIO *b, char *buf, int len)
{
return -1;
}
static int
s_ustream_puts(BIO *b, const char *str)
{
return s_ustream_write(b, str, strlen(str));
}
static long s_ustream_ctrl(BIO *b, int cmd, long num, void *ptr)
{
switch (cmd) {
case BIO_CTRL_FLUSH:
return 1;
default:
return 0;
};
}
static BIO *ustream_bio_new(struct ustream *s)
{
BIO *bio;
struct bio_ctx *ctx = calloc(1, sizeof(struct bio_ctx));
ctx->stream = s;
ctx->meth = BIO_meth_new(100 | BIO_TYPE_SOURCE_SINK, "ustream");
BIO_meth_set_write(ctx->meth, s_ustream_write);
BIO_meth_set_read(ctx->meth, s_ustream_read);
BIO_meth_set_puts(ctx->meth, s_ustream_puts);
BIO_meth_set_gets(ctx->meth, s_ustream_gets);
BIO_meth_set_ctrl(ctx->meth, s_ustream_ctrl);
BIO_meth_set_create(ctx->meth, s_ustream_new);
BIO_meth_set_destroy(ctx->meth, s_ustream_free);
bio = BIO_new(ctx->meth);
BIO_set_data(bio, ctx);
return bio;
}
__hidden void ustream_set_io(struct ustream_ssl_ctx *ctx, void *ssl, struct ustream *conn)
{
BIO *bio = ustream_bio_new(conn);
SSL_set_bio(ssl, bio, bio);
}
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