98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
/* Copyright (C) The libssh2 project and its contributors.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <libssh2.h>
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#include "testinput.h"
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#define FUZZ_ASSERT(COND) \
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if(!(COND)) \
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{ \
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fprintf(stderr, "Assertion failed: " #COND "\n%s", \
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strerror(errno)); \
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assert((COND)); \
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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int socket_fds[2] = {-1, -1};
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ssize_t written;
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int rc;
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LIBSSH2_SESSION *session = NULL;
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int handshake_completed = 0;
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rc = libssh2_init(0);
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if(rc) {
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fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
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goto EXIT_LABEL;
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}
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// Create a socket pair so data can be sent in.
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rc = socketpair(AF_UNIX, SOCK_STREAM, 0, socket_fds);
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FUZZ_ASSERT(rc == 0);
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written = send(socket_fds[1], data, size, 0);
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if(written != size)
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{
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// Handle whatever error case we're in.
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fprintf(stderr, "send() of %zu bytes returned %zu (%d)\n",
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size,
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written,
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errno);
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goto EXIT_LABEL;
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}
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rc = shutdown(socket_fds[1], SHUT_WR);
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if(rc)
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{
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fprintf(stderr, "socket shutdown failed (%d)\n", rc);
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goto EXIT_LABEL;
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}
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// Create a session and start the handshake using the fuzz data passed in.
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session = libssh2_session_init();
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if(session) {
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libssh2_session_set_blocking(session, 1);
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}
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else {
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goto EXIT_LABEL;
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}
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if(libssh2_session_handshake(session, socket_fds[0])) {
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goto EXIT_LABEL;
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}
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// If we get here the handshake actually completed.
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handshake_completed = 1;
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EXIT_LABEL:
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if(session)
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{
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if(handshake_completed)
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{
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libssh2_session_disconnect(session,
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"Normal Shutdown, Thank you for playing");
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}
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libssh2_session_free(session);
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}
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libssh2_exit();
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close(socket_fds[0]);
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close(socket_fds[1]);
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return 0;
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}
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