sslslave.c
上传用户:ig0539
上传日期:2022-05-21
资源大小:181k
文件大小:3k
- /*
- * Part of Very Secure FTPd
- * Licence: GPL v2
- * Author: Chris Evans
- * sslslave.c
- */
- #include "sslslave.h"
- #include "session.h"
- #include "privsock.h"
- #include "tunables.h"
- #include "sysutil.h"
- #include "sysdeputil.h"
- #include "utility.h"
- #include "ssl.h"
- #include "readwrite.h"
- #include "defs.h"
- void
- ssl_slave(struct vsf_session* p_sess)
- {
- struct mystr data_str = INIT_MYSTR;
- str_reserve(&data_str, VSFTP_DATA_BUFSIZE);
- /* Before becoming the slave, clear the alarm for the FTP protocol. */
- vsf_sysutil_clear_alarm();
- /* No need for any further communications with the privileged parent. */
- priv_sock_set_parent_context(p_sess);
- if (tunable_setproctitle_enable)
- {
- vsf_sysutil_setproctitle("SSL handler");
- }
- while (1)
- {
- char cmd = priv_sock_get_cmd(p_sess->ssl_slave_fd);
- int ret;
- if (cmd == PRIV_SOCK_GET_USER_CMD)
- {
- ret = ftp_getline(p_sess, &p_sess->ftp_cmd_str,
- p_sess->p_control_line_buf);
- priv_sock_send_int(p_sess->ssl_slave_fd, ret);
- if (ret >= 0)
- {
- priv_sock_send_str(p_sess->ssl_slave_fd, &p_sess->ftp_cmd_str);
- }
- }
- else if (cmd == PRIV_SOCK_WRITE_USER_RESP)
- {
- priv_sock_get_str(p_sess->ssl_slave_fd, &p_sess->ftp_cmd_str);
- ret = ftp_write_str(p_sess, &p_sess->ftp_cmd_str, kVSFRWControl);
- priv_sock_send_int(p_sess->ssl_slave_fd, ret);
- }
- else if (cmd == PRIV_SOCK_DO_SSL_HANDSHAKE)
- {
- char result = PRIV_SOCK_RESULT_BAD;
- if (p_sess->data_fd != -1 || p_sess->p_data_ssl != 0)
- {
- bug("state not clean");
- }
- p_sess->data_fd = priv_sock_recv_fd(p_sess->ssl_slave_fd);
- ret = ssl_accept(p_sess, p_sess->data_fd);
- if (ret == 1)
- {
- result = PRIV_SOCK_RESULT_OK;
- }
- else
- {
- vsf_sysutil_close(p_sess->data_fd);
- p_sess->data_fd = -1;
- }
- priv_sock_send_result(p_sess->ssl_slave_fd, result);
- }
- else if (cmd == PRIV_SOCK_DO_SSL_READ)
- {
- str_trunc(&data_str, VSFTP_DATA_BUFSIZE);
- ret = ssl_read_into_str(p_sess, p_sess->p_data_ssl, &data_str);
- priv_sock_send_int(p_sess->ssl_slave_fd, ret);
- priv_sock_send_str(p_sess->ssl_slave_fd, &data_str);
- }
- else if (cmd == PRIV_SOCK_DO_SSL_WRITE)
- {
- priv_sock_get_str(p_sess->ssl_slave_fd, &data_str);
- ret = ssl_write(p_sess->p_data_ssl,
- str_getbuf(&data_str),
- str_getlen(&data_str));
- priv_sock_send_int(p_sess->ssl_slave_fd, ret);
- }
- else if (cmd == PRIV_SOCK_DO_SSL_CLOSE)
- {
- char result = PRIV_SOCK_RESULT_BAD;
- if (p_sess->data_fd == -1 && p_sess->p_data_ssl == 0)
- {
- result = PRIV_SOCK_RESULT_OK;
- }
- else
- {
- ret = ssl_data_close(p_sess);
- if (ret == 1)
- {
- result = PRIV_SOCK_RESULT_OK;
- }
- vsf_sysutil_close(p_sess->data_fd);
- p_sess->data_fd = -1;
- }
- priv_sock_send_result(p_sess->ssl_slave_fd, result);
- }
- else
- {
- die("bad request in process_ssl_slave_req");
- }
- }
- }