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-rwxr-xr-xconfigure.ac40
-rw-r--r--lib/Makefile.inc2
-rw-r--r--lib/easy.c13
-rw-r--r--lib/url.c4
-rw-r--r--lib/version.c6
-rw-r--r--lib/vssh/ssh.h22
-rw-r--r--lib/vssh/wolfssh.c1150
-rw-r--r--lib/vssh/wolfssh.h27
8 files changed, 1247 insertions, 17 deletions
diff --git a/configure.ac b/configure.ac
index dd149b7e3..5d8215c59 100755
--- a/configure.ac
+++ b/configure.ac
@@ -2795,17 +2795,23 @@ dnl **********************************************************************
dnl Default to compiler & linker defaults for LIBSSH2 files & libraries.
OPT_LIBSSH2=off
AC_ARG_WITH(libssh2,dnl
-AC_HELP_STRING([--with-libssh2=PATH],[Where to look for libssh2, PATH points to the LIBSSH2 installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
-AC_HELP_STRING([--with-libssh2], [enable LIBSSH2]),
+AC_HELP_STRING([--with-libssh2=PATH],[Where to look for libssh2, PATH points to the libssh2 installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
+AC_HELP_STRING([--with-libssh2], [enable libssh2]),
OPT_LIBSSH2=$withval, OPT_LIBSSH2=no)
OPT_LIBSSH=off
AC_ARG_WITH(libssh,dnl
-AC_HELP_STRING([--with-libssh=PATH],[Where to look for libssh, PATH points to the LIBSSH installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
-AC_HELP_STRING([--with-libssh], [enable LIBSSH]),
+AC_HELP_STRING([--with-libssh=PATH],[Where to look for libssh, PATH points to the libssh installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
+AC_HELP_STRING([--with-libssh], [enable libssh]),
OPT_LIBSSH=$withval, OPT_LIBSSH=no)
+OPT_WOLFSSH=off
+AC_ARG_WITH(wolfssh,dnl
+AC_HELP_STRING([--with-wolfssh=PATH],[Where to look for wolfssh, PATH points to the wolfSSH installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
+AC_HELP_STRING([--with-wolfssh], [enable wolfssh]),
+ OPT_WOLFSSH=$withval, OPT_WOLFSSH=no)
+
if test X"$OPT_LIBSSH2" != Xno; then
dnl backup the pre-libssh2 variables
CLEANLDFLAGS="$LDFLAGS"
@@ -2952,6 +2958,28 @@ elif test X"$OPT_LIBSSH" != Xno; then
CPPFLAGS=$CLEANCPPFLAGS
LIBS=$CLEANLIBS
fi
+elif test X"$OPT_WOLFSSH" != Xno; then
+ dnl backup the pre-wolfssh variables
+ CLEANLDFLAGS="$LDFLAGS"
+ CLEANCPPFLAGS="$CPPFLAGS"
+ CLEANLIBS="$LIBS"
+
+
+ if test "$OPT_WOLFSSH" != yes; then
+ WOLFCONFIG="$OPT_WOLFSSH/bin/wolfssh-config"
+ LDFLAGS="$LDFLAGS `$WOLFCONFIG --libs`"
+ CPPFLAGS="$CPPFLAGS `$WOLFCONFIG --cflags`"
+ fi
+
+ AC_CHECK_LIB(wolfssh, wolfSSH_Init)
+
+ AC_CHECK_HEADERS(wolfssh/ssh.h,
+ curl_ssh_msg="enabled (wolfSSH)"
+ WOLFSSH_ENABLED=1
+ AC_DEFINE(USE_WOLFSSH, 1, [if wolfSSH is in use])
+ AC_SUBST(USE_WOLFSSH, [1])
+ )
+
fi
dnl **********************************************************************
@@ -4761,6 +4789,10 @@ if test "x$USE_LIBSSH" = "x1"; then
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
fi
+if test "x$USE_WOLFSSH" = "x1"; then
+ SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
+ SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
+fi
if test "x$CURL_DISABLE_RTSP" != "x1"; then
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS RTSP"
fi
diff --git a/lib/Makefile.inc b/lib/Makefile.inc
index 6c90c2675..4e19ea90c 100644
--- a/lib/Makefile.inc
+++ b/lib/Makefile.inc
@@ -42,7 +42,7 @@ LIB_VQUIC_CFILES = vquic/ngtcp2.c vquic/quiche.c
LIB_VQUIC_HFILES = vquic/ngtcp2.h vquic/quiche.h
-LIB_VSSH_CFILES = vssh/libssh2.c vssh/libssh.c
+LIB_VSSH_CFILES = vssh/libssh2.c vssh/libssh.c vssh/wolfssh.c
LIB_VSSH_HFILES = vssh/ssh.h
diff --git a/lib/easy.c b/lib/easy.c
index 6382cee3d..9211bc219 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -193,6 +193,13 @@ static CURLcode global_init(long flags, bool memoryfuncs)
}
#endif
+#ifdef USE_WOLFSSH
+ if(WS_SUCCESS != wolfSSH_Init()) {
+ DEBUGF(fprintf(stderr, "Error: wolfSSH_Init failed\n"));
+ return CURLE_FAILED_INIT;
+ }
+#endif
+
if(flags & CURL_GLOBAL_ACK_EINTR)
Curl_ack_eintr = 1;
@@ -272,6 +279,10 @@ void curl_global_cleanup(void)
Curl_ssh_cleanup();
+#ifdef USE_WOLFSSH
+ (void)wolfSSH_Cleanup();
+#endif
+
init_flags = 0;
}
diff --git a/lib/url.c b/lib/url.c
index 56fb73636..4797b5182 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -187,7 +187,7 @@ static const struct Curl_handler * const protocols[] = {
&Curl_handler_tftp,
#endif
-#if defined(USE_SSH)
+#if defined(USE_SSH) && !defined(USE_WOLFSSH)
&Curl_handler_scp,
#endif
diff --git a/lib/version.c b/lib/version.c
index 6405d369d..77aca7cbe 100644
--- a/lib/version.c
+++ b/lib/version.c
@@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -265,8 +265,10 @@ static const char * const protocols[] = {
#ifndef CURL_DISABLE_RTSP
"rtsp",
#endif
-#if defined(USE_SSH)
+#if defined(USE_SSH) && !defined(USE_WOLFSSH)
"scp",
+#endif
+#ifdef USE_SSH
"sftp",
#endif
#if !defined(CURL_DISABLE_SMB) && defined(USE_NTLM) && \
diff --git a/lib/vssh/ssh.h b/lib/vssh/ssh.h
index 3213c5a52..0d4ee521d 100644
--- a/lib/vssh/ssh.h
+++ b/lib/vssh/ssh.h
@@ -7,7 +7,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@@ -30,7 +30,10 @@
#elif defined(HAVE_LIBSSH_LIBSSH_H)
#include <libssh/libssh.h>
#include <libssh/sftp.h>
-#endif /* HAVE_LIBSSH2_H */
+#elif defined(USE_WOLFSSH)
+#include <wolfssh/ssh.h>
+#include <wolfssh/wolfsftp.h>
+#endif
/****************************************************************************
* SSH unique setup
@@ -188,6 +191,12 @@ struct ssh_conn {
#ifdef HAVE_LIBSSH2_KNOWNHOST_API
LIBSSH2_KNOWNHOSTS *kh;
#endif
+#elif defined(USE_WOLFSSH)
+ WOLFSSH *ssh_session;
+ WOLFSSH_CTX *ctx;
+ word32 handleSz;
+ byte handle[WOLFSSH_MAX_HANDLE];
+ curl_off_t offset;
#endif /* USE_LIBSSH */
};
@@ -195,9 +204,6 @@ struct ssh_conn {
#define CURL_LIBSSH_VERSION ssh_version(0)
-extern const struct Curl_handler Curl_handler_scp;
-extern const struct Curl_handler Curl_handler_sftp;
-
#elif defined(USE_LIBSSH2)
/* Feature detection based on version numbers to better work with
@@ -237,11 +243,13 @@ extern const struct Curl_handler Curl_handler_sftp;
#define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
#endif
-extern const struct Curl_handler Curl_handler_scp;
-extern const struct Curl_handler Curl_handler_sftp;
#endif /* USE_LIBSSH2 */
#ifdef USE_SSH
+
+extern const struct Curl_handler Curl_handler_scp;
+extern const struct Curl_handler Curl_handler_sftp;
+
/* generic SSH backend functions */
CURLcode Curl_ssh_init(void);
void Curl_ssh_cleanup(void);
diff --git a/lib/vssh/wolfssh.c b/lib/vssh/wolfssh.c
new file mode 100644
index 000000000..e2daf0c0a
--- /dev/null
+++ b/lib/vssh/wolfssh.c
@@ -0,0 +1,1150 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2019 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef USE_WOLFSSH
+
+#include <limits.h>
+
+#include <wolfssh/ssh.h>
+#include <wolfssh/wolfsftp.h>
+#include "urldata.h"
+#include "connect.h"
+#include "sendf.h"
+#include "progress.h"
+#include "curl_path.h"
+#include "strtoofft.h"
+#include "transfer.h"
+#include "speedcheck.h"
+#include "select.h"
+#include "multiif.h"
+#include "warnless.h"
+
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+static CURLcode wssh_connect(struct connectdata *conn, bool *done);
+static CURLcode wssh_multi_statemach(struct connectdata *conn, bool *done);
+static CURLcode wssh_do(struct connectdata *conn, bool *done);
+#if 0
+static CURLcode wscp_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode wscp_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode wscp_disconnect(struct connectdata *conn,
+ bool dead_connection);
+#endif
+static CURLcode wsftp_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode wsftp_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode wsftp_disconnect(struct connectdata *conn, bool dead);
+static int wssh_getsock(struct connectdata *conn,
+ curl_socket_t *sock);
+static int wssh_perform_getsock(const struct connectdata *conn,
+ curl_socket_t *sock);
+static CURLcode wssh_setup_connection(struct connectdata *conn);
+
+#if 0
+/*
+ * SCP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_scp = {
+ "SCP", /* scheme */
+ wssh_setup_connection, /* setup_connection */
+ wssh_do, /* do_it */
+ wscp_done, /* done */
+ ZERO_NULL, /* do_more */
+ wssh_connect, /* connect_it */
+ wssh_multi_statemach, /* connecting */
+ wscp_doing, /* doing */
+ wssh_getsock, /* proto_getsock */
+ wssh_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ wssh_perform_getsock, /* perform_getsock */
+ wscp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ ZERO_NULL, /* connection_check */
+ PORT_SSH, /* defport */
+ CURLPROTO_SCP, /* protocol */
+ PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+ | PROTOPT_NOURLQUERY /* flags */
+};
+
+#endif
+
+/*
+ * SFTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_sftp = {
+ "SFTP", /* scheme */
+ wssh_setup_connection, /* setup_connection */
+ wssh_do, /* do_it */
+ wsftp_done, /* done */
+ ZERO_NULL, /* do_more */
+ wssh_connect, /* connect_it */
+ wssh_multi_statemach, /* connecting */
+ wsftp_doing, /* doing */
+ wssh_getsock, /* proto_getsock */
+ wssh_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ wssh_perform_getsock, /* perform_getsock */
+ wsftp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ ZERO_NULL, /* connection_check */
+ PORT_SSH, /* defport */
+ CURLPROTO_SFTP, /* protocol */
+ PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+ | PROTOPT_NOURLQUERY /* flags */
+};
+
+/*
+ * SSH State machine related code
+ */
+/* This is the ONLY way to change SSH state! */
+static void state(struct connectdata *conn, sshstate nowstate)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ /* for debug purposes */
+ static const char * const names[] = {
+ "SSH_STOP",
+ "SSH_INIT",
+ "SSH_S_STARTUP",
+ "SSH_HOSTKEY",
+ "SSH_AUTHLIST",
+ "SSH_AUTH_PKEY_INIT",
+ "SSH_AUTH_PKEY",
+ "SSH_AUTH_PASS_INIT",
+ "SSH_AUTH_PASS",
+ "SSH_AUTH_AGENT_INIT",
+ "SSH_AUTH_AGENT_LIST",
+ "SSH_AUTH_AGENT",
+ "SSH_AUTH_HOST_INIT",
+ "SSH_AUTH_HOST",
+ "SSH_AUTH_KEY_INIT",
+ "SSH_AUTH_KEY",
+ "SSH_AUTH_GSSAPI",
+ "SSH_AUTH_DONE",
+ "SSH_SFTP_INIT",
+ "SSH_SFTP_REALPATH",
+ "SSH_SFTP_QUOTE_INIT",
+ "SSH_SFTP_POSTQUOTE_INIT",
+ "SSH_SFTP_QUOTE",
+ "SSH_SFTP_NEXT_QUOTE",
+ "SSH_SFTP_QUOTE_STAT",
+ "SSH_SFTP_QUOTE_SETSTAT",
+ "SSH_SFTP_QUOTE_SYMLINK",
+ "SSH_SFTP_QUOTE_MKDIR",
+ "SSH_SFTP_QUOTE_RENAME",
+ "SSH_SFTP_QUOTE_RMDIR",
+ "SSH_SFTP_QUOTE_UNLINK",
+ "SSH_SFTP_QUOTE_STATVFS",
+ "SSH_SFTP_GETINFO",
+ "SSH_SFTP_FILETIME",
+ "SSH_SFTP_TRANS_INIT",
+ "SSH_SFTP_UPLOAD_INIT",
+ "SSH_SFTP_CREATE_DIRS_INIT",
+ "SSH_SFTP_CREATE_DIRS",
+ "SSH_SFTP_CREATE_DIRS_MKDIR",
+ "SSH_SFTP_READDIR_INIT",
+ "SSH_SFTP_READDIR",
+ "SSH_SFTP_READDIR_LINK",
+ "SSH_SFTP_READDIR_BOTTOM",
+ "SSH_SFTP_READDIR_DONE",
+ "SSH_SFTP_DOWNLOAD_INIT",
+ "SSH_SFTP_DOWNLOAD_STAT",
+ "SSH_SFTP_CLOSE",
+ "SSH_SFTP_SHUTDOWN",
+ "SSH_SCP_TRANS_INIT",
+ "SSH_SCP_UPLOAD_INIT",
+ "SSH_SCP_DOWNLOAD_INIT",
+ "SSH_SCP_DOWNLOAD",
+ "SSH_SCP_DONE",
+ "SSH_SCP_SEND_EOF",
+ "SSH_SCP_WAIT_EOF",
+ "SSH_SCP_WAIT_CLOSE",
+ "SSH_SCP_CHANNEL_FREE",
+ "SSH_SESSION_DISCONNECT",
+ "SSH_SESSION_FREE",
+ "QUIT"
+ };
+
+ /* a precaution to make sure the lists are in sync */
+ DEBUGASSERT(sizeof(names)/sizeof(names[0]) == SSH_LAST);
+
+ if(sshc->state != nowstate) {
+ infof(conn->data, "wolfssh %p state change from %s to %s\n",
+ (void *)sshc, names[sshc->state], names[nowstate]);
+ }
+#endif
+
+ sshc->state = nowstate;
+}
+
+static ssize_t wscp_send(struct connectdata *conn, int sockindex,
+ const void *mem, size_t len, CURLcode *err)
+{
+ ssize_t nwrite = 0;
+ (void)conn;
+ (void)sockindex; /* we only support SCP on the fixed known primary socket */
+ (void)mem;
+ (void)len;
+ (void)err;
+
+ return nwrite;
+}
+
+static ssize_t wscp_recv(struct connectdata *conn, int sockindex,
+ char *mem, size_t len, CURLcode *err)
+{
+ ssize_t nread = 0;
+ (void)conn;
+ (void)sockindex; /* we only support SCP on the fixed known primary socket */
+ (void)mem;
+ (void)len;
+ (void)err;
+
+ return nread;
+}
+
+/* return number of sent bytes */
+static ssize_t wsftp_send(struct connectdata *conn, int sockindex,
+ const void *mem, size_t len, CURLcode *err)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ word32 offset[2];
+ int rc;
+ (void)sockindex;
+
+ offset[0] = (word32)sshc->offset&0xFFFFFFFF;
+ offset[1] = (word32)(sshc->offset>>32)&0xFFFFFFFF;
+
+ rc = wolfSSH_SFTP_SendWritePacket(sshc->ssh_session, sshc->handle,
+ sshc->handleSz,
+ &offset[0],
+ (byte *)mem, (word32)len);
+
+ if(rc == WS_FATAL_ERROR)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ conn->waitfor = KEEP_RECV;
+ *err = CURLE_AGAIN;
+ return -1;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ conn->waitfor = KEEP_SEND;
+ *err = CURLE_AGAIN;
+ return -1;
+ }
+ if(rc < 0) {
+ failf(conn->data, "wolfSSH_SFTP_SendWritePacket returned %d\n", rc);
+ return -1;
+ }
+ DEBUGASSERT(rc == (int)len);
+ infof(conn->data, "sent %zd bytes SFTP from offset %zd\n",
+ len, sshc->offset);
+ sshc->offset += len;
+ return (ssize_t)rc;
+}
+
+/*
+ * Return number of received (decrypted) bytes
+ * or <0 on error
+ */
+static ssize_t wsftp_recv(struct connectdata *conn, int sockindex,
+ char *mem, size_t len, CURLcode *err)
+{
+ int rc;
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ word32 offset[2];
+ (void)sockindex;
+
+ offset[0] = (word32)sshc->offset&0xFFFFFFFF;
+ offset[1] = (word32)(sshc->offset>>32)&0xFFFFFFFF;
+
+ rc = wolfSSH_SFTP_SendReadPacket(sshc->ssh_session, sshc->handle,
+ sshc->handleSz,
+ &offset[0],
+ (byte *)mem, (word32)len);
+ if(rc == WS_FATAL_ERROR)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ conn->waitfor = KEEP_RECV;
+ *err = CURLE_AGAIN;
+ return -1;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ conn->waitfor = KEEP_SEND;
+ *err = CURLE_AGAIN;
+ return -1;
+ }
+
+ DEBUGASSERT(rc <= (int)len);
+
+ if(rc < 0) {
+ failf(conn->data, "wolfSSH_SFTP_SendReadPacket returned %d\n", rc);
+ return -1;
+ }
+ sshc->offset += len;
+
+ return (ssize_t)rc;
+}
+
+/*
+ * SSH setup and connection
+ */
+static CURLcode wssh_setup_connection(struct connectdata *conn)
+{
+ struct SSHPROTO *ssh;
+
+ conn->data->req.protop = ssh = calloc(1, sizeof(struct SSHPROTO));
+ if(!ssh)
+ return CURLE_OUT_OF_MEMORY;
+
+ return CURLE_OK;
+}
+
+static Curl_recv wscp_recv, wsftp_recv;
+static Curl_send wscp_send, wsftp_send;
+
+static int userauth(byte authtype,
+ WS_UserAuthData* authdata,
+ void *ctx)
+{
+ struct connectdata *conn = ctx;
+ word32 plen = (word32) strlen(conn->passwd);
+ fprintf(stderr, "wolfssh callback: %s type %s\n", __func__,
+ authtype == WOLFSSH_USERAUTH_PASSWORD ? "PASSWORD" :
+ "PUBLICCKEY");
+ authdata->sf.password.password = (byte *)conn->user;
+ authdata->sf.password.passwordSz = plen;
+
+ return 0;
+}
+
+static CURLcode wssh_connect(struct connectdata *conn, bool *done)
+{
+ struct Curl_easy *data = conn->data;
+ struct ssh_conn *sshc;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ int rc;
+
+ /* initialize per-handle data if not already */
+ if(!data->req.protop)
+ wssh_setup_connection(conn);
+
+ /* We default to persistent connections. We set this already in this connect
+ function to make the re-use checks properly be able to check this bit. */
+ connkeep(conn, "SSH default");
+
+ if(conn->handler->protocol & CURLPROTO_SCP) {
+ conn->recv[FIRSTSOCKET] = wscp_recv;
+ conn->send[FIRSTSOCKET] = wscp_send;
+ }
+ else {
+ conn->recv[FIRSTSOCKET] = wsftp_recv;
+ conn->send[FIRSTSOCKET] = wsftp_send;
+ }
+ sshc = &conn->proto.sshc;
+ sshc->ctx = wolfSSH_CTX_new(WOLFSSH_ENDPOINT_CLIENT, NULL);
+ if(!sshc->ctx) {
+ failf(data, "No wolfSSH context");
+ goto error;
+ }
+
+ sshc->ssh_session = wolfSSH_new(sshc->ctx);
+ if(sshc->ssh_session == NULL) {
+ failf(data, "No wolfSSH session");
+ goto error;
+ }
+
+ rc = wolfSSH_SetUsername(sshc->ssh_session, conn->user);
+ if(rc != WS_SUCCESS) {
+ failf(data, "wolfSSH failed to set user name");
+ goto error;
+ }
+
+ /* set callback for authentication */
+ wolfSSH_SetUserAuth(sshc->ctx, userauth);
+ wolfSSH_SetUserAuthCtx(sshc->ssh_session, conn);
+
+ rc = wolfSSH_set_fd(sshc->ssh_session, (int)sock);
+ if(rc) {
+ failf(data, "wolfSSH failed to set socket");
+ goto error;
+ }
+
+#if 0
+ wolfSSH_Debugging_ON();
+#endif
+
+ *done = TRUE;
+ if(conn->handler->protocol & CURLPROTO_SCP)
+ state(conn, SSH_INIT);
+ else
+ state(conn, SSH_SFTP_INIT);
+
+ return wssh_multi_statemach(conn, done);
+ error:
+ wolfSSH_free(sshc->ssh_session);
+ wolfSSH_CTX_free(sshc->ctx);
+ return CURLE_FAILED_INIT;
+}
+
+/*
+ * wssh_statemach_act() runs the SSH state machine as far as it can without
+ * blocking and without reaching the end. The data the pointer 'block' points
+ * to will be set to TRUE if the wolfssh function returns EAGAIN meaning it
+ * wants to be called again when the socket is ready
+ */
+
+static CURLcode wssh_statemach_act(struct connectdata *conn, bool *block)
+{
+ CURLcode result = CURLE_OK;
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ struct Curl_easy *data = conn->data;
+ struct SSHPROTO *sftp_scp = data->req.protop;
+ WS_SFTPNAME *name;
+ int rc = 0;
+ *block = FALSE; /* we're not blocking by default */
+
+ do {
+ switch(sshc->state) {
+ case SSH_INIT:
+ state(conn, SSH_S_STARTUP);
+ /* FALLTHROUGH */
+ case SSH_S_STARTUP:
+ rc = wolfSSH_connect(sshc->ssh_session);
+ if(rc != WS_SUCCESS)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc != WS_SUCCESS) {
+ state(conn, SSH_STOP);
+ return CURLE_SSH;
+ }
+ infof(data, "wolfssh connected!\n");
+ state(conn, SSH_STOP);
+ break;
+ case SSH_STOP:
+ break;
+
+ case SSH_SFTP_INIT:
+ rc = wolfSSH_SFTP_connect(sshc->ssh_session);
+ if(rc != WS_SUCCESS)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc == WS_SUCCESS) {
+ infof(data, "wolfssh SFTP connected!\n");
+ state(conn, SSH_SFTP_REALPATH);
+ }
+ else {
+ failf(data, "wolfssh SFTP connect error %d", rc);
+ return CURLE_SSH;
+ }
+ break;
+ case SSH_SFTP_REALPATH:
+ name = wolfSSH_SFTP_RealPath(sshc->ssh_session, (char *)".");
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(name && (rc == WS_SUCCESS)) {
+ sshc->homedir = malloc(name->fSz + 1);
+ if(!sshc->homedir) {
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ }
+ else {
+ memcpy(sshc->homedir, name->fName, name->fSz);
+ sshc->homedir[name->fSz] = 0;
+ infof(data, "wolfssh SFTP realpath succeeded!\n");
+ }
+ wolfSSH_SFTPNAME_list_free(name);
+ state(conn, SSH_STOP);
+ return CURLE_OK;
+ }
+ failf(data, "wolfssh SFTP realpath %d", rc);
+ return CURLE_SSH;
+
+ case SSH_SFTP_QUOTE_INIT:
+ result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
+ if(result) {
+ sshc->actualcode = result;
+ state(conn, SSH_STOP);
+ break;
+ }
+
+ if(data->set.quote) {
+ infof(data, "Sending quote commands\n");
+ sshc->quote_item = data->set.quote;
+ state(conn, SSH_SFTP_QUOTE);
+ }
+ else {
+ state(conn, SSH_SFTP_GETINFO);
+ }
+ break;
+ case SSH_SFTP_GETINFO:
+ if(data->set.get_filetime) {
+ state(conn, SSH_SFTP_FILETIME);
+ }
+ else {
+ state(conn, SSH_SFTP_TRANS_INIT);
+ }
+ break;
+ case SSH_SFTP_TRANS_INIT:
+ if(data->set.upload)
+ state(conn, SSH_SFTP_UPLOAD_INIT);
+ else {
+ if(sftp_scp->path[strlen(sftp_scp->path)-1] == '/')
+ state(conn, SSH_SFTP_READDIR_INIT);
+ else
+ state(conn, SSH_SFTP_DOWNLOAD_INIT);
+ }
+ break;
+ case SSH_SFTP_UPLOAD_INIT: {
+ word32 flags;
+ WS_SFTP_FILEATRB createattrs;
+ if(data->state.resume_from) {
+ WS_SFTP_FILEATRB attrs;
+ if(data->state.resume_from < 0) {
+ rc = wolfSSH_SFTP_STAT(sshc->ssh_session, sftp_scp->path,
+ &attrs);
+ if(rc != WS_SUCCESS)
+ break;
+
+ if(rc) {
+ data->state.resume_from = 0;
+ }
+ else {
+ curl_off_t size = ((curl_off_t)attrs.sz[1] << 32) | attrs.sz[0];
+ if(size < 0) {
+ failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ data->state.resume_from = size;
+ }
+ }
+ }
+
+ if(data->set.ftp_append)
+ /* Try to open for append, but create if nonexisting */
+ flags = WOLFSSH_FXF_WRITE|WOLFSSH_FXF_CREAT|WOLFSSH_FXF_APPEND;
+ else if(data->state.resume_from > 0)
+ /* If we have restart position then open for append */
+ flags = WOLFSSH_FXF_WRITE|WOLFSSH_FXF_APPEND;
+ else
+ /* Clear file before writing (normal behaviour) */
+ flags = WOLFSSH_FXF_WRITE|WOLFSSH_FXF_CREAT|WOLFSSH_FXF_TRUNC;
+
+ memset(&createattrs, 0, sizeof(createattrs));
+ createattrs.per = (word32)data->set.new_file_perms;
+ sshc->handleSz = sizeof(sshc->handle);
+ rc = wolfSSH_SFTP_Open(sshc->ssh_session, sftp_scp->path,
+ flags, &createattrs,
+ sshc->handle, &sshc->handleSz);
+ if(rc == WS_FATAL_ERROR)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc == WS_SUCCESS) {
+ infof(data, "wolfssh SFTP open succeeded!\n");
+ }
+ else {
+ failf(data, "wolfssh SFTP upload open failed: %d", rc);
+ return CURLE_SSH;
+ }
+ state(conn, SSH_SFTP_DOWNLOAD_STAT);
+
+ /* If we have a restart point then we need to seek to the correct
+ position. */
+ if(data->state.resume_from > 0) {
+ /* Let's read off the proper amount of bytes from the input. */
+ int seekerr = CURL_SEEKFUNC_OK;
+ if(conn->seek_func) {
+ Curl_set_in_callback(data, true);
+ seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
+ SEEK_SET);
+ Curl_set_in_callback(data, false);
+ }
+
+ if(seekerr != CURL_SEEKFUNC_OK) {
+ curl_off_t passed = 0;
+
+ if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
+ failf(data, "Could not seek stream");
+ return CURLE_FTP_COULDNT_USE_REST;
+ }
+ /* seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
+ do {
+ size_t readthisamountnow =
+ (data->state.resume_from - passed > data->set.buffer_size) ?
+ (size_t)data->set.buffer_size :
+ curlx_sotouz(data->state.resume_from - passed);
+
+ size_t actuallyread;
+ Curl_set_in_callback(data, true);
+ actuallyread = data->state.fread_func(data->state.buffer, 1,
+ readthisamountnow,
+ data->state.in);
+ Curl_set_in_callback(data, false);
+
+ passed += actuallyread;
+ if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
+ /* this checks for greater-than only to make sure that the
+ CURL_READFUNC_ABORT return code still aborts */
+ failf(data, "Failed to read data");
+ return CURLE_FTP_COULDNT_USE_REST;
+ }
+ } while(passed < data->state.resume_from);
+ }
+
+ /* now, decrease the size of the read */
+ if(data->state.infilesize > 0) {
+ data->state.infilesize -= data->state.resume_from;
+ data->req.size = data->state.infilesize;
+ Curl_pgrsSetUploadSize(data, data->state.infilesize);
+ }
+
+ sshc->offset += data->state.resume_from;
+ }
+ if(data->state.infilesize > 0) {
+ data->req.size = data->state.infilesize;
+ Curl_pgrsSetUploadSize(data, data->state.infilesize);
+ }
+ /* upload data */
+ Curl_setup_transfer(data, -1, -1, FALSE, FIRSTSOCKET);
+
+ /* not set by Curl_setup_transfer to preserve keepon bits */
+ conn->sockfd = conn->writesockfd;
+
+ if(result) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = result;
+ }
+ else {
+ /* store this original bitmask setup to use later on if we can't
+ figure out a "real" bitmask */
+ sshc->orig_waitfor = data->req.keepon;
+
+ /* we want to use the _sending_ function even when the socket turns
+ out readable as the underlying libssh2 sftp send function will deal
+ with both accordingly */
+ conn->cselect_bits = CURL_CSELECT_OUT;
+
+ /* since we don't really wait for anything at this point, we want the
+ state machine to move on as soon as possible so we set a very short
+ timeout here */
+ Curl_expire(data, 0, EXPIRE_RUN_NOW);
+
+ state(conn, SSH_STOP);
+ }
+ break;
+ }
+ case SSH_SFTP_DOWNLOAD_INIT:
+ sshc->handleSz = sizeof(sshc->handle);
+ rc = wolfSSH_SFTP_Open(sshc->ssh_session, sftp_scp->path,
+ WOLFSSH_FXF_READ, NULL,
+ sshc->handle, &sshc->handleSz);
+ if(rc == WS_FATAL_ERROR)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc == WS_SUCCESS) {
+ infof(data, "wolfssh SFTP open succeeded!\n");
+ state(conn, SSH_SFTP_DOWNLOAD_STAT);
+ return CURLE_OK;
+ }
+
+ failf(data, "wolfssh SFTP open failed: %d", rc);
+ return CURLE_SSH;
+
+ case SSH_SFTP_DOWNLOAD_STAT: {
+ WS_SFTP_FILEATRB attrs;
+ curl_off_t size;
+
+ rc = wolfSSH_SFTP_STAT(sshc->ssh_session, sftp_scp->path, &attrs);
+ if(rc == WS_FATAL_ERROR)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc == WS_SUCCESS) {
+ infof(data, "wolfssh STAT succeeded!\n");
+ }
+ else {
+ failf(data, "wolfssh SFTP open failed: %d", rc);
+ data->req.size = -1;
+ data->req.maxdownload = -1;
+ Curl_pgrsSetDownloadSize(data, -1);
+ return CURLE_SSH;
+ }
+
+ size = ((curl_off_t)attrs.sz[1] <<32) | attrs.sz[0];
+
+ data->req.size = size;
+ data->req.maxdownload = size;
+ Curl_pgrsSetDownloadSize(data, size);
+
+ infof(data, "SFTP download %" CURL_FORMAT_CURL_OFF_T " bytes\n", size);
+
+ /* We cannot seek with wolfSSH so resuming and range requests are not
+ possible */
+ if(conn->data->state.use_range || data->state.resume_from) {
+ infof(data, "wolfSSH cannot do range/seek on SFTP\n");
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+
+ /* Setup the actual download */
+ if(data->req.size == 0) {
+ /* no data to transfer */
+ Curl_setup_transfer(data, -1, -1, FALSE, -1);
+ infof(data, "File already completely downloaded\n");
+ state(conn, SSH_STOP);
+ break;
+ }
+ Curl_setup_transfer(data, FIRSTSOCKET, data->req.size, FALSE, -1);
+
+ /* not set by Curl_setup_transfer to preserve keepon bits */
+ conn->writesockfd = conn->sockfd;
+
+ /* we want to use the _receiving_ function even when the socket turns
+ out writableable as the underlying libssh2 recv function will deal
+ with both accordingly */
+ conn->cselect_bits = CURL_CSELECT_IN;
+
+ if(result) {
+ /* this should never occur; the close state should be entered
+ at the time the error occurs */
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = result;
+ }
+ else {
+ state(conn, SSH_STOP);
+ }
+ break;
+ }
+ case SSH_SFTP_CLOSE:
+ if(sshc->handleSz)
+ rc = wolfSSH_SFTP_Close(sshc->ssh_session, sshc->handle,
+ sshc->handleSz);
+ else
+ rc = WS_SUCCESS; /* directory listing */
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(rc == WS_SUCCESS) {
+ state(conn, SSH_STOP);
+ return CURLE_OK;
+ }
+
+ failf(data, "wolfssh SFTP CLOSE failed: %d", rc);
+ return CURLE_SSH;
+
+ case SSH_SFTP_READDIR_INIT:
+ Curl_pgrsSetDownloadSize(data, -1);
+ if(data->set.opt_no_body) {
+ state(conn, SSH_STOP);
+ break;
+ }
+ state(conn, SSH_SFTP_READDIR);
+ /* FALLTHROUGH */
+ case SSH_SFTP_READDIR:
+ name = wolfSSH_SFTP_LS(sshc->ssh_session, sftp_scp->path);
+ if(!name)
+ rc = wolfSSH_get_error(sshc->ssh_session);
+ else
+ rc = WS_SUCCESS;
+
+ if(rc == WS_WANT_READ) {
+ *block = TRUE;
+ conn->waitfor = KEEP_RECV;
+ return CURLE_OK;
+ }
+ else if(rc == WS_WANT_WRITE) {
+ *block = TRUE;
+ conn->waitfor = KEEP_SEND;
+ return CURLE_OK;
+ }
+ else if(name && (rc == WS_SUCCESS)) {
+ WS_SFTPNAME *origname = name;
+ result = CURLE_OK;
+ while(name) {
+ char *line = aprintf("%s\n",
+ data->set.ftp_list_only ?
+ name->fName : name->lName);
+ if(line == NULL) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ result = Curl_client_write(conn, CLIENTWRITE_BODY,
+ line, strlen(line));
+ free(line);
+ if(result) {
+ sshc->actualcode = result;
+ break;
+ }
+ name = name->next;
+ }
+ wolfSSH_SFTPNAME_list_free(origname);
+ state(conn, SSH_STOP);
+ return result;
+ }
+ failf(data, "wolfssh SFTP ls failed: %d", rc);
+ return CURLE_SSH;
+
+ case SSH_SFTP_SHUTDOWN:
+ Curl_safefree(sshc->homedir);
+ wolfSSH_free(sshc->ssh_session);
+ wolfSSH_CTX_free(sshc->ctx);
+ state(conn, SSH_STOP);
+ return CURLE_OK;
+ default:
+ break;
+ }
+ } while(!rc && (sshc->state != SSH_STOP));
+ return result;
+}
+
+/* called repeatedly until done from multi.c */
+static CURLcode wssh_multi_statemach(struct connectdata *conn, bool *done)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ CURLcode result = CURLE_OK;
+ bool block; /* we store the status and use that to provide a ssh_getsock()
+ implementation */
+ do {
+ result = wssh_statemach_act(conn, &block);
+ *done = (sshc->state == SSH_STOP) ? TRUE : FALSE;
+ /* if there's no error, it isn't done and it didn't EWOULDBLOCK, then
+ try again */
+ if(*done) {
+ fprintf(stderr, "%s says DONE\n", __func__);
+ }
+ } while(!result && !*done && !block);
+
+ return result;
+}
+
+static
+CURLcode wscp_perform(struct connectdata *conn,
+ bool *connected,
+ bool *dophase_done)
+{
+ (void)conn;
+ (void)connected;
+ (void)dophase_done;
+ return CURLE_OK;
+}
+
+static
+CURLcode wsftp_perform(struct connectdata *conn,
+ bool *connected,
+ bool *dophase_done)
+{
+ CURLcode result = CURLE_OK;
+
+ DEBUGF(infof(conn->data, "DO phase starts\n"));
+
+ *dophase_done = FALSE; /* not done yet */
+
+ /* start the first command in the DO phase */
+ state(conn, SSH_SFTP_QUOTE_INIT);
+
+ /* run the state-machine */
+ result = wssh_multi_statemach(conn, dophase_done);
+
+ *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+
+ return result;
+}
+
+/*
+ * The DO function is generic for both protocols.
+ */
+static CURLcode wssh_do(struct connectdata *conn, bool *done)
+{
+ CURLcode result;
+ bool connected = 0;
+ struct Curl_easy *data = conn->data;
+ struct ssh_conn *sshc = &conn->proto.sshc;
+
+ *done = FALSE; /* default to false */
+ data->req.size = -1; /* make sure this is unknown at this point */
+ sshc->actualcode = CURLE_OK; /* reset error code */
+ sshc->secondCreateDirs = 0; /* reset the create dir attempt state
+ variable */
+
+ Curl_pgrsSetUploadCounter(data, 0);
+ Curl_pgrsSetDownloadCounter(data, 0);
+ Curl_pgrsSetUploadSize(data, -1);
+ Curl_pgrsSetDownloadSize(data, -1);
+
+ if(conn->handler->protocol & CURLPROTO_SCP)
+ result = wscp_perform(conn, &connected, done);
+ else
+ result = wsftp_perform(conn, &connected, done);
+
+ return result;
+}
+
+static CURLcode wssh_block_statemach(struct connectdata *conn,
+ bool disconnect)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ CURLcode result = CURLE_OK;
+ struct Curl_easy *data = conn->data;
+
+ while((sshc->state != SSH_STOP) && !result) {
+ bool block;
+ timediff_t left = 1000;
+ struct curltime now = Curl_now();
+
+ result = wssh_statemach_act(conn, &block);
+ if(result)
+ break;
+
+ if(!disconnect) {
+ if(Curl_pgrsUpdate(conn))
+ return CURLE_ABORTED_BY_CALLBACK;
+
+ result = Curl_speedcheck(data, now);
+ if(result)
+ break;
+
+ left = Curl_timeleft(data, NULL, FALSE);
+ if(left < 0) {
+ failf(data, "Operation timed out");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+ }
+
+ if(!result) {
+ int dir = conn->waitfor;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ curl_socket_t fd_read = CURL_SOCKET_BAD;
+ curl_socket_t fd_write = CURL_SOCKET_BAD;
+ if(dir == KEEP_RECV)
+ fd_read = sock;
+ else if(dir == KEEP_SEND)
+ fd_write = sock;
+
+ /* wait for the socket to become ready */
+ (void)Curl_socket_check(fd_read, CURL_SOCKET_BAD, fd_write,
+ left>1000?1000:left); /* ignore result */
+ }
+ }
+
+ return result;
+}
+
+/* generic done function for both SCP and SFTP called from their specific
+ done functions */
+static CURLcode wssh_done(struct connectdata *conn, CURLcode status)
+{
+ CURLcode result = CURLE_OK;
+ struct SSHPROTO *sftp_scp = conn->data->req.protop;
+
+ if(!status) {
+ /* run the state-machine */
+ result = wssh_block_statemach(conn, FALSE);
+ }
+ else
+ result = status;
+
+ if(sftp_scp)
+ Curl_safefree(sftp_scp->path);
+ if(Curl_pgrsDone(conn))
+ return CURLE_ABORTED_BY_CALLBACK;
+
+ conn->data->req.keepon = 0; /* clear all bits */
+ return result;
+}
+
+#if 0
+static CURLcode wscp_done(struct connectdata *conn,
+ CURLcode code, bool premature)
+{
+ CURLcode result = CURLE_OK;
+ (void)conn;
+ (void)code;
+ (void)premature;
+
+ return result;
+}
+
+static CURLcode wscp_doing(struct connectdata *conn,
+ bool *dophase_done)
+{
+ CURLcode result = CURLE_OK;
+ (void)conn;
+ (void)dophase_done;
+
+ return result;
+}
+
+static CURLcode wscp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+ CURLcode result = CURLE_OK;
+ (void)conn;
+ (void)dead_connection;
+
+ return result;
+}
+#endif
+
+static CURLcode wsftp_done(struct connectdata *conn,
+ CURLcode code, bool premature)
+{
+ (void)premature;
+ state(conn, SSH_SFTP_CLOSE);
+
+ return wssh_done(conn, code);
+}
+
+static CURLcode wsftp_doing(struct connectdata *conn,
+ bool *dophase_done)
+{
+ CURLcode result = wssh_multi_statemach(conn, dophase_done);
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+ return result;
+}
+
+static CURLcode wsftp_disconnect(struct connectdata *conn, bool dead)
+{
+ CURLcode result = CURLE_OK;
+ (void)dead;
+
+ DEBUGF(infof(conn->data, "SSH DISCONNECT starts now\n"));
+
+ if(conn->proto.sshc.ssh_session) {
+ /* only if there's a session still around to use! */
+ state(conn, SSH_SFTP_SHUTDOWN);
+ result = wssh_block_statemach(conn, TRUE);
+ }
+
+ DEBUGF(infof(conn->data, "SSH DISCONNECT is done\n"));
+ return result;
+}
+
+static int wssh_getsock(struct connectdata *conn,
+ curl_socket_t *sock)
+{
+ return wssh_perform_getsock(conn, sock);
+}
+
+static int wssh_perform_getsock(const struct connectdata *conn,
+ curl_socket_t *sock)
+{
+ int bitmap = GETSOCK_BLANK;
+ int dir = conn->waitfor;
+ sock[0] = conn->sock[FIRSTSOCKET];
+
+ if(dir == KEEP_RECV)
+ bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
+ else if(dir == KEEP_SEND)
+ bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
+
+ return bitmap;
+}
+
+size_t Curl_ssh_version(char *buffer, size_t buflen)
+{
+ return msnprintf(buffer, buflen, "wolfssh/%s", LIBWOLFSSH_VERSION_STRING);
+}
+
+CURLcode Curl_ssh_init(void)
+{
+ return CURLE_OK;
+}
+void Curl_ssh_cleanup(void)
+{
+}
+
+#endif /* USE_WOLFSSH */
diff --git a/lib/vssh/wolfssh.h b/lib/vssh/wolfssh.h
new file mode 100644
index 000000000..a9b9a3b09
--- /dev/null
+++ b/lib/vssh/wolfssh.h
@@ -0,0 +1,27 @@
+#ifndef HEADER_CURL_WOLFSSH_H
+#define HEADER_CURL_WOLFSSH_H
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2019 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+extern const struct Curl_handler Curl_handler_sftp;
+
+#endif /* HEADER_CURL_WOLFSSH_H */
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