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/*
* Copyright (C) 2017 Nikos Mavrogiannopoulos
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
#ifndef HANDSHAKE_H
# define HANDSHAKE_H
#define HANDSHAKE_MAX_RETRY_COUNT 10
typedef struct mem_st {
const uint8_t *data;
size_t size;
} mem_st;
static ssize_t
error_push(gnutls_transport_ptr_t tr, const void *data, size_t len)
{
return -1;
}
static ssize_t
error_pull(gnutls_transport_ptr_t tr, void *data, size_t len)
{
return -1;
}
static int
handshake_discard(gnutls_session_t session,
gnutls_record_encryption_level_t level,
gnutls_handshake_description_t htype,
const void *data, size_t data_size)
{
return 0;
}
static int
handshake_pull(gnutls_session_t session, mem_st *data)
{
uint32_t level, size;
int ret;
if (data->size < 4) {
return -1;
}
level = ((unsigned)data->data[0] << 24) | (data->data[1] << 16) |
(data->data[2] << 8) | data->data[3];
data->size -= 4;
data->data += 4;
if (data->size < 4) {
return -1;
}
size = ((unsigned)data->data[0] << 24) | (data->data[1] << 16) |
(data->data[2] << 8) | data->data[3];
data->size -= 4;
data->data += 4;
if (size > data->size) {
return -1;
}
ret = gnutls_handshake_write(session,
(gnutls_record_encryption_level_t)level,
data->data,
size);
data->size -= size;
data->data += size;
return ret;
}
#endif
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