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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <errno.h>
#include "api/s2n.h"
#include "s2n_test.h"
#include "tls/s2n_connection.h"
#define RANDOM_ERRNO 150
int fake_recv(void *io_context, uint8_t *buf, uint32_t len)
{
/* Pretend that we have no data available to read for alert lookup. */
errno = EAGAIN;
return -1;
}
int fake_send(void *io_context, const uint8_t *buf, uint32_t len)
{
/* Fail the write with non-retriable error. */
errno = ENOENT;
return -1;
}
int main(int argc, char **argv)
{
struct s2n_connection *conn;
s2n_blocked_status blocked;
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
/* Non-retriable errnos in io are not overwritten by retriable errnos */
{
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
/* Set custom recv/send callbacks. */
EXPECT_SUCCESS(s2n_connection_set_recv_cb(conn, &fake_recv));
EXPECT_SUCCESS(s2n_connection_set_send_cb(conn, &fake_send));
/* Perform the handshake and expect an error from write, instead of error from alert read. */
EXPECT_EQUAL(s2n_negotiate(conn, &blocked), -1);
EXPECT_EQUAL(errno, ENOENT);
EXPECT_EQUAL(s2n_errno, S2N_ERR_IO);
s2n_errno = 0;
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* s2n_negotiate should not overwrite a non-retriable s2n_error with a retriable s2n_error.
* This previously happened if errno was set to a retriable error before s2n_negotiate
* was called, and a non-retriable error occurred in an io function before errno was
* reset for the system call. */
{
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
/* Set errno to a random value */
errno = RANDOM_ERRNO;
/* Break io setup. Will fail a non-null check before io system call. */
conn->recv = NULL;
/* Perform the handshake and expect an s2n_error */
/* Do not use EXPECT_FAILURE here -- it resets s2n_errno */
EXPECT_EQUAL(s2n_negotiate(conn, &blocked), -1);
EXPECT_EQUAL(errno, 0);
EXPECT_EQUAL(s2n_errno, S2N_ERR_IO);
s2n_errno = 0;
EXPECT_SUCCESS(s2n_connection_free(conn));
};
END_TEST();
}
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