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authorGeorge Hazan <george.hazan@gmail.com>2015-07-25 13:12:20 +0000
committerGeorge Hazan <george.hazan@gmail.com>2015-07-25 13:12:20 +0000
commitdae9bc184b44c2b0c70b7996f202d6a7fa2dd4a4 (patch)
tree2aa80518d791c24e939e6525901da4dea39d46df /libs/libcurl/src/ssh.c
parentbc55bf103dc79145ddd24e93a8f96fc6e8cf46d7 (diff)
libcurl extracted to the separate lib
git-svn-id: http://svn.miranda-ng.org/main/trunk@14683 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'libs/libcurl/src/ssh.c')
-rw-r--r--libs/libcurl/src/ssh.c3271
1 files changed, 3271 insertions, 0 deletions
diff --git a/libs/libcurl/src/ssh.c b/libs/libcurl/src/ssh.c
new file mode 100644
index 0000000000..c213225db4
--- /dev/null
+++ b/libs/libcurl/src/ssh.c
@@ -0,0 +1,3271 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2013, 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 http://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.
+ *
+ ***************************************************************************/
+
+/* #define CURL_LIBSSH2_DEBUG */
+
+#include "curl_setup.h"
+
+#ifdef USE_LIBSSH2
+
+#ifdef HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UTSNAME_H
+#include <sys/utsname.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
+#undef in_addr_t
+#define in_addr_t unsigned long
+#endif
+
+#include <curl/curl.h>
+#include "urldata.h"
+#include "sendf.h"
+#include "hostip.h"
+#include "progress.h"
+#include "transfer.h"
+#include "escape.h"
+#include "http.h" /* for HTTP proxy tunnel stuff */
+#include "ssh.h"
+#include "url.h"
+#include "speedcheck.h"
+#include "getinfo.h"
+
+#include "strequal.h"
+#include "sslgen.h"
+#include "connect.h"
+#include "strerror.h"
+#include "inet_ntop.h"
+#include "parsedate.h" /* for the week day and month names */
+#include "sockaddr.h" /* required for Curl_sockaddr_storage */
+#include "strtoofft.h"
+#include "multiif.h"
+#include "select.h"
+#include "warnless.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+#ifdef WIN32
+# undef PATH_MAX
+# define PATH_MAX MAX_PATH
+#endif
+
+#ifndef PATH_MAX
+#define PATH_MAX 1024 /* just an extra precaution since there are systems that
+ have their definition hidden well */
+#endif
+
+#define sftp_libssh2_last_error(s) curlx_ultosi(libssh2_sftp_last_error(s))
+
+#define sftp_libssh2_realpath(s,p,t,m) \
+ libssh2_sftp_symlink_ex((s), (p), curlx_uztoui(strlen(p)), \
+ (t), (m), LIBSSH2_SFTP_REALPATH)
+
+/* Local functions: */
+static const char *sftp_libssh2_strerror(int err);
+static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
+static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc);
+static LIBSSH2_FREE_FUNC(my_libssh2_free);
+
+static CURLcode get_pathname(const char **cpp, char **path);
+
+static CURLcode ssh_connect(struct connectdata *conn, bool *done);
+static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done);
+static CURLcode ssh_do(struct connectdata *conn, bool *done);
+
+static CURLcode ssh_getworkingpath(struct connectdata *conn,
+ char *homedir, /* when SFTP is used */
+ char **path);
+
+static CURLcode scp_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode scp_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode scp_disconnect(struct connectdata *conn, bool dead_connection);
+
+static CURLcode sftp_done(struct connectdata *conn,
+ CURLcode, bool premature);
+static CURLcode sftp_doing(struct connectdata *conn,
+ bool *dophase_done);
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead);
+static
+CURLcode sftp_perform(struct connectdata *conn,
+ bool *connected,
+ bool *dophase_done);
+
+static int ssh_getsock(struct connectdata *conn,
+ curl_socket_t *sock, /* points to numsocks number
+ of sockets */
+ int numsocks);
+
+static int ssh_perform_getsock(const struct connectdata *conn,
+ curl_socket_t *sock, /* points to numsocks
+ number of sockets */
+ int numsocks);
+
+static CURLcode ssh_setup_connection(struct connectdata *conn);
+
+/*
+ * SCP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_scp = {
+ "SCP", /* scheme */
+ ssh_setup_connection, /* setup_connection */
+ ssh_do, /* do_it */
+ scp_done, /* done */
+ ZERO_NULL, /* do_more */
+ ssh_connect, /* connect_it */
+ ssh_multi_statemach, /* connecting */
+ scp_doing, /* doing */
+ ssh_getsock, /* proto_getsock */
+ ssh_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ssh_perform_getsock, /* perform_getsock */
+ scp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SSH, /* defport */
+ CURLPROTO_SCP, /* protocol */
+ PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+ | PROTOPT_NOURLQUERY /* flags */
+};
+
+
+/*
+ * SFTP protocol handler.
+ */
+
+const struct Curl_handler Curl_handler_sftp = {
+ "SFTP", /* scheme */
+ ssh_setup_connection, /* setup_connection */
+ ssh_do, /* do_it */
+ sftp_done, /* done */
+ ZERO_NULL, /* do_more */
+ ssh_connect, /* connect_it */
+ ssh_multi_statemach, /* connecting */
+ sftp_doing, /* doing */
+ ssh_getsock, /* proto_getsock */
+ ssh_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ssh_perform_getsock, /* perform_getsock */
+ sftp_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_SSH, /* defport */
+ CURLPROTO_SFTP, /* protocol */
+ PROTOPT_DIRLOCK | PROTOPT_CLOSEACTION
+ | PROTOPT_NOURLQUERY /* flags */
+};
+
+static void
+kbd_callback(const char *name, int name_len, const char *instruction,
+ int instruction_len, int num_prompts,
+ const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
+ LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
+ void **abstract)
+{
+ struct connectdata *conn = (struct connectdata *)*abstract;
+
+#ifdef CURL_LIBSSH2_DEBUG
+ fprintf(stderr, "name=%s\n", name);
+ fprintf(stderr, "name_len=%d\n", name_len);
+ fprintf(stderr, "instruction=%s\n", instruction);
+ fprintf(stderr, "instruction_len=%d\n", instruction_len);
+ fprintf(stderr, "num_prompts=%d\n", num_prompts);
+#else
+ (void)name;
+ (void)name_len;
+ (void)instruction;
+ (void)instruction_len;
+#endif /* CURL_LIBSSH2_DEBUG */
+ if(num_prompts == 1) {
+ responses[0].text = strdup(conn->passwd);
+ responses[0].length = curlx_uztoui(strlen(conn->passwd));
+ }
+ (void)prompts;
+ (void)abstract;
+} /* kbd_callback */
+
+static CURLcode sftp_libssh2_error_to_CURLE(int err)
+{
+ switch (err) {
+ case LIBSSH2_FX_OK:
+ return CURLE_OK;
+
+ case LIBSSH2_FX_NO_SUCH_FILE:
+ case LIBSSH2_FX_NO_SUCH_PATH:
+ return CURLE_REMOTE_FILE_NOT_FOUND;
+
+ case LIBSSH2_FX_PERMISSION_DENIED:
+ case LIBSSH2_FX_WRITE_PROTECT:
+ case LIBSSH2_FX_LOCK_CONFlICT:
+ return CURLE_REMOTE_ACCESS_DENIED;
+
+ case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
+ case LIBSSH2_FX_QUOTA_EXCEEDED:
+ return CURLE_REMOTE_DISK_FULL;
+
+ case LIBSSH2_FX_FILE_ALREADY_EXISTS:
+ return CURLE_REMOTE_FILE_EXISTS;
+
+ case LIBSSH2_FX_DIR_NOT_EMPTY:
+ return CURLE_QUOTE_ERROR;
+
+ default:
+ break;
+ }
+
+ return CURLE_SSH;
+}
+
+static CURLcode libssh2_session_error_to_CURLE(int err)
+{
+ switch (err) {
+ /* Ordered by order of appearance in libssh2.h */
+ case LIBSSH2_ERROR_NONE:
+ return CURLE_OK;
+
+ case LIBSSH2_ERROR_SOCKET_NONE:
+ return CURLE_COULDNT_CONNECT;
+
+ case LIBSSH2_ERROR_ALLOC:
+ return CURLE_OUT_OF_MEMORY;
+
+ case LIBSSH2_ERROR_SOCKET_SEND:
+ return CURLE_SEND_ERROR;
+
+ case LIBSSH2_ERROR_HOSTKEY_INIT:
+ case LIBSSH2_ERROR_HOSTKEY_SIGN:
+ case LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED:
+ case LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED:
+ return CURLE_PEER_FAILED_VERIFICATION;
+
+ case LIBSSH2_ERROR_PASSWORD_EXPIRED:
+ return CURLE_LOGIN_DENIED;
+
+ case LIBSSH2_ERROR_SOCKET_TIMEOUT:
+ case LIBSSH2_ERROR_TIMEOUT:
+ return CURLE_OPERATION_TIMEDOUT;
+
+ case LIBSSH2_ERROR_EAGAIN:
+ return CURLE_AGAIN;
+ }
+
+ /* TODO: map some more of the libssh2 errors to the more appropriate CURLcode
+ error code, and possibly add a few new SSH-related one. We must however
+ not return or even depend on libssh2 errors in the public libcurl API */
+
+ return CURLE_SSH;
+}
+
+static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc)
+{
+ (void)abstract; /* arg not used */
+ return malloc(count);
+}
+
+static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc)
+{
+ (void)abstract; /* arg not used */
+ return realloc(ptr, count);
+}
+
+static LIBSSH2_FREE_FUNC(my_libssh2_free)
+{
+ (void)abstract; /* arg not used */
+ if(ptr) /* ssh2 agent sometimes call free with null ptr */
+ free(ptr);
+}
+
+/*
+ * SSH State machine related code
+ */
+/* This is the ONLY way to change SSH state! */
+static void state(struct connectdata *conn, sshstate nowstate)
+{
+#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_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_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_DONE",
+ "SSH_SCP_SEND_EOF",
+ "SSH_SCP_WAIT_EOF",
+ "SSH_SCP_WAIT_CLOSE",
+ "SSH_SCP_CHANNEL_FREE",
+ "SSH_SESSION_DISCONNECT",
+ "SSH_SESSION_FREE",
+ "QUIT"
+ };
+#endif
+ struct ssh_conn *sshc = &conn->proto.sshc;
+
+#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
+ if(sshc->state != nowstate) {
+ infof(conn->data, "SFTP %p state change from %s to %s\n",
+ (void *)sshc, names[sshc->state], names[nowstate]);
+ }
+#endif
+
+ sshc->state = nowstate;
+}
+
+/* figure out the path to work with in this particular request */
+static CURLcode ssh_getworkingpath(struct connectdata *conn,
+ char *homedir, /* when SFTP is used */
+ char **path) /* returns the allocated
+ real path to work with */
+{
+ struct SessionHandle *data = conn->data;
+ char *real_path = NULL;
+ char *working_path;
+ int working_path_len;
+
+ working_path = curl_easy_unescape(data, data->state.path, 0,
+ &working_path_len);
+ if(!working_path)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Check for /~/ , indicating relative to the user's home directory */
+ if(conn->handler->protocol & CURLPROTO_SCP) {
+ real_path = malloc(working_path_len+1);
+ if(real_path == NULL) {
+ free(working_path);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3)))
+ /* It is referenced to the home directory, so strip the leading '/~/' */
+ memcpy(real_path, working_path+3, 4 + working_path_len-3);
+ else
+ memcpy(real_path, working_path, 1 + working_path_len);
+ }
+ else if(conn->handler->protocol & CURLPROTO_SFTP) {
+ if((working_path_len > 1) && (working_path[1] == '~')) {
+ size_t homelen = strlen(homedir);
+ real_path = malloc(homelen + working_path_len + 1);
+ if(real_path == NULL) {
+ free(working_path);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ /* It is referenced to the home directory, so strip the
+ leading '/' */
+ memcpy(real_path, homedir, homelen);
+ real_path[homelen] = '/';
+ real_path[homelen+1] = '\0';
+ if(working_path_len > 3) {
+ memcpy(real_path+homelen+1, working_path + 3,
+ 1 + working_path_len -3);
+ }
+ }
+ else {
+ real_path = malloc(working_path_len+1);
+ if(real_path == NULL) {
+ free(working_path);
+ return CURLE_OUT_OF_MEMORY;
+ }
+ memcpy(real_path, working_path, 1+working_path_len);
+ }
+ }
+
+ free(working_path);
+
+ /* store the pointer for the caller to receive */
+ *path = real_path;
+
+ return CURLE_OK;
+}
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+static int sshkeycallback(CURL *easy,
+ const struct curl_khkey *knownkey, /* known */
+ const struct curl_khkey *foundkey, /* found */
+ enum curl_khmatch match,
+ void *clientp)
+{
+ (void)easy;
+ (void)knownkey;
+ (void)foundkey;
+ (void)clientp;
+
+ /* we only allow perfect matches, and we reject everything else */
+ return (match != CURLKHMATCH_OK)?CURLKHSTAT_REJECT:CURLKHSTAT_FINE;
+}
+#endif
+
+/*
+ * Earlier libssh2 versions didn't have the ability to seek to 64bit positions
+ * with 32bit size_t.
+ */
+#ifdef HAVE_LIBSSH2_SFTP_SEEK64
+#define SFTP_SEEK(x,y) libssh2_sftp_seek64(x, (libssh2_uint64_t)y)
+#else
+#define SFTP_SEEK(x,y) libssh2_sftp_seek(x, (size_t)y)
+#endif
+
+/*
+ * Earlier libssh2 versions didn't do SCP properly beyond 32bit sizes on 32bit
+ * architectures so we check of the necessary function is present.
+ */
+#ifndef HAVE_LIBSSH2_SCP_SEND64
+#define SCP_SEND(a,b,c,d) libssh2_scp_send_ex(a, b, (int)(c), (size_t)d, 0, 0)
+#else
+#define SCP_SEND(a,b,c,d) libssh2_scp_send64(a, b, (int)(c), \
+ (libssh2_uint64_t)d, 0, 0)
+#endif
+
+/*
+ * libssh2 1.2.8 fixed the problem with 32bit ints used for sockets on win64.
+ */
+#ifdef HAVE_LIBSSH2_SESSION_HANDSHAKE
+#define libssh2_session_startup(x,y) libssh2_session_handshake(x,y)
+#endif
+
+static CURLcode ssh_knownhost(struct connectdata *conn)
+{
+ CURLcode result = CURLE_OK;
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+ struct SessionHandle *data = conn->data;
+
+ if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
+ /* we're asked to verify the host against a file */
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ int rc;
+ int keytype;
+ size_t keylen;
+ const char *remotekey = libssh2_session_hostkey(sshc->ssh_session,
+ &keylen, &keytype);
+ int keycheck = LIBSSH2_KNOWNHOST_CHECK_FAILURE;
+ int keybit = 0;
+
+ if(remotekey) {
+ /*
+ * A subject to figure out is what host name we need to pass in here.
+ * What host name does OpenSSH store in its file if an IDN name is
+ * used?
+ */
+ struct libssh2_knownhost *host;
+ enum curl_khmatch keymatch;
+ curl_sshkeycallback func =
+ data->set.ssh_keyfunc?data->set.ssh_keyfunc:sshkeycallback;
+ struct curl_khkey knownkey;
+ struct curl_khkey *knownkeyp = NULL;
+ struct curl_khkey foundkey;
+
+ keybit = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+ LIBSSH2_KNOWNHOST_KEY_SSHRSA:LIBSSH2_KNOWNHOST_KEY_SSHDSS;
+
+ keycheck = libssh2_knownhost_check(sshc->kh,
+ conn->host.name,
+ remotekey, keylen,
+ LIBSSH2_KNOWNHOST_TYPE_PLAIN|
+ LIBSSH2_KNOWNHOST_KEYENC_RAW|
+ keybit,
+ &host);
+
+ infof(data, "SSH host check: %d, key: %s\n", keycheck,
+ (keycheck <= LIBSSH2_KNOWNHOST_CHECK_MISMATCH)?
+ host->key:"<none>");
+
+ /* setup 'knownkey' */
+ if(keycheck <= LIBSSH2_KNOWNHOST_CHECK_MISMATCH) {
+ knownkey.key = host->key;
+ knownkey.len = 0;
+ knownkey.keytype = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+ CURLKHTYPE_RSA : CURLKHTYPE_DSS;
+ knownkeyp = &knownkey;
+ }
+
+ /* setup 'foundkey' */
+ foundkey.key = remotekey;
+ foundkey.len = keylen;
+ foundkey.keytype = (keytype == LIBSSH2_HOSTKEY_TYPE_RSA)?
+ CURLKHTYPE_RSA : CURLKHTYPE_DSS;
+
+ /*
+ * if any of the LIBSSH2_KNOWNHOST_CHECK_* defines and the
+ * curl_khmatch enum are ever modified, we need to introduce a
+ * translation table here!
+ */
+ keymatch = (enum curl_khmatch)keycheck;
+
+ /* Ask the callback how to behave */
+ rc = func(data, knownkeyp, /* from the knownhosts file */
+ &foundkey, /* from the remote host */
+ keymatch, data->set.ssh_keyfunc_userp);
+ }
+ else
+ /* no remotekey means failure! */
+ rc = CURLKHSTAT_REJECT;
+
+ switch(rc) {
+ default: /* unknown return codes will equal reject */
+ case CURLKHSTAT_REJECT:
+ state(conn, SSH_SESSION_FREE);
+ case CURLKHSTAT_DEFER:
+ /* DEFER means bail out but keep the SSH_HOSTKEY state */
+ result = sshc->actualcode = CURLE_PEER_FAILED_VERIFICATION;
+ break;
+ case CURLKHSTAT_FINE:
+ case CURLKHSTAT_FINE_ADD_TO_FILE:
+ /* proceed */
+ if(keycheck != LIBSSH2_KNOWNHOST_CHECK_MATCH) {
+ /* the found host+key didn't match but has been told to be fine
+ anyway so we add it in memory */
+ int addrc = libssh2_knownhost_add(sshc->kh,
+ conn->host.name, NULL,
+ remotekey, keylen,
+ LIBSSH2_KNOWNHOST_TYPE_PLAIN|
+ LIBSSH2_KNOWNHOST_KEYENC_RAW|
+ keybit, NULL);
+ if(addrc)
+ infof(data, "Warning adding the known host %s failed!\n",
+ conn->host.name);
+ else if(rc == CURLKHSTAT_FINE_ADD_TO_FILE) {
+ /* now we write the entire in-memory list of known hosts to the
+ known_hosts file */
+ int wrc =
+ libssh2_knownhost_writefile(sshc->kh,
+ data->set.str[STRING_SSH_KNOWNHOSTS],
+ LIBSSH2_KNOWNHOST_FILE_OPENSSH);
+ if(wrc) {
+ infof(data, "Warning, writing %s failed!\n",
+ data->set.str[STRING_SSH_KNOWNHOSTS]);
+ }
+ }
+ }
+ break;
+ }
+ }
+#else /* HAVE_LIBSSH2_KNOWNHOST_API */
+ (void)conn;
+#endif
+ return result;
+}
+
+static CURLcode ssh_check_fingerprint(struct connectdata *conn)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ struct SessionHandle *data = conn->data;
+ const char *pubkey_md5 = data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5];
+ char md5buffer[33];
+ int i;
+
+ const char *fingerprint = libssh2_hostkey_hash(sshc->ssh_session,
+ LIBSSH2_HOSTKEY_HASH_MD5);
+
+ if(fingerprint) {
+ /* The fingerprint points to static storage (!), don't free() it. */
+ for(i = 0; i < 16; i++)
+ snprintf(&md5buffer[i*2], 3, "%02x", (unsigned char) fingerprint[i]);
+ infof(data, "SSH MD5 fingerprint: %s\n", md5buffer);
+ }
+
+ /* Before we authenticate we check the hostkey's MD5 fingerprint
+ * against a known fingerprint, if available.
+ */
+ if(pubkey_md5 && strlen(pubkey_md5) == 32) {
+ if(!fingerprint || !strequal(md5buffer, pubkey_md5)) {
+ if(fingerprint)
+ failf(data,
+ "Denied establishing ssh session: mismatch md5 fingerprint. "
+ "Remote %s is not equal to %s", md5buffer, pubkey_md5);
+ else
+ failf(data,
+ "Denied establishing ssh session: md5 fingerprint not available");
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_PEER_FAILED_VERIFICATION;
+ return sshc->actualcode;
+ }
+ else {
+ infof(data, "MD5 checksum match!\n");
+ /* as we already matched, we skip the check for known hosts */
+ return CURLE_OK;
+ }
+ }
+ else
+ return ssh_knownhost(conn);
+}
+
+/*
+ * ssh_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 libssh2 function returns LIBSSH2_ERROR_EAGAIN
+ * meaning it wants to be called again when the socket is ready
+ */
+
+static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
+{
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct SSHPROTO *sftp_scp = data->req.protop;
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ char *new_readdir_line;
+ int rc = LIBSSH2_ERROR_NONE;
+ int err;
+ int seekerr = CURL_SEEKFUNC_OK;
+ *block = 0; /* we're not blocking by default */
+
+ do {
+
+ switch(sshc->state) {
+ case SSH_INIT:
+ sshc->secondCreateDirs = 0;
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_OK;
+
+ /* Set libssh2 to non-blocking, since everything internally is
+ non-blocking */
+ libssh2_session_set_blocking(sshc->ssh_session, 0);
+
+ state(conn, SSH_S_STARTUP);
+ /* fall-through */
+
+ case SSH_S_STARTUP:
+ rc = libssh2_session_startup(sshc->ssh_session, (int)sock);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ failf(data, "Failure establishing ssh session");
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_FAILED_INIT;
+ break;
+ }
+
+ state(conn, SSH_HOSTKEY);
+
+ /* fall-through */
+ case SSH_HOSTKEY:
+ /*
+ * Before we authenticate we should check the hostkey's fingerprint
+ * against our known hosts. How that is handled (reading from file,
+ * whatever) is up to us.
+ */
+ result = ssh_check_fingerprint(conn);
+ if(result == CURLE_OK)
+ state(conn, SSH_AUTHLIST);
+ break;
+
+ case SSH_AUTHLIST:
+ /*
+ * Figure out authentication methods
+ * NB: As soon as we have provided a username to an openssh server we
+ * must never change it later. Thus, always specify the correct username
+ * here, even though the libssh2 docs kind of indicate that it should be
+ * possible to get a 'generic' list (not user-specific) of authentication
+ * methods, presumably with a blank username. That won't work in my
+ * experience.
+ * So always specify it here.
+ */
+ sshc->authlist = libssh2_userauth_list(sshc->ssh_session,
+ conn->user,
+ curlx_uztoui(strlen(conn->user)));
+
+ if(!sshc->authlist) {
+ if((err = libssh2_session_last_errno(sshc->ssh_session)) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = libssh2_session_error_to_CURLE(err);
+ break;
+ }
+ }
+ infof(data, "SSH authentication methods available: %s\n",
+ sshc->authlist);
+
+ state(conn, SSH_AUTH_PKEY_INIT);
+ break;
+
+ case SSH_AUTH_PKEY_INIT:
+ /*
+ * Check the supported auth types in the order I feel is most secure
+ * with the requested type of authentication
+ */
+ sshc->authed = FALSE;
+
+ if((data->set.ssh_auth_types & CURLSSH_AUTH_PUBLICKEY) &&
+ (strstr(sshc->authlist, "publickey") != NULL)) {
+ char *home = NULL;
+ bool rsa_pub_empty_but_ok = FALSE;
+
+ sshc->rsa_pub = sshc->rsa = NULL;
+
+ /* To ponder about: should really the lib be messing about with the
+ HOME environment variable etc? */
+ home = curl_getenv("HOME");
+
+ if(data->set.str[STRING_SSH_PUBLIC_KEY] &&
+ !*data->set.str[STRING_SSH_PUBLIC_KEY])
+ rsa_pub_empty_but_ok = true;
+ else if(data->set.str[STRING_SSH_PUBLIC_KEY])
+ sshc->rsa_pub = aprintf("%s", data->set.str[STRING_SSH_PUBLIC_KEY]);
+ else if(home)
+ sshc->rsa_pub = aprintf("%s/.ssh/id_dsa.pub", home);
+ else
+ /* as a final resort, try current dir! */
+ sshc->rsa_pub = strdup("id_dsa.pub");
+
+ if(!rsa_pub_empty_but_ok && (sshc->rsa_pub == NULL)) {
+ Curl_safefree(home);
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+
+ if(data->set.str[STRING_SSH_PRIVATE_KEY])
+ sshc->rsa = aprintf("%s", data->set.str[STRING_SSH_PRIVATE_KEY]);
+ else if(home)
+ sshc->rsa = aprintf("%s/.ssh/id_dsa", home);
+ else
+ /* as a final resort, try current dir! */
+ sshc->rsa = strdup("id_dsa");
+
+ if(sshc->rsa == NULL) {
+ Curl_safefree(home);
+ Curl_safefree(sshc->rsa_pub);
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+
+ sshc->passphrase = data->set.str[STRING_KEY_PASSWD];
+ if(!sshc->passphrase)
+ sshc->passphrase = "";
+
+ Curl_safefree(home);
+
+ infof(data, "Using ssh public key file %s\n", sshc->rsa_pub);
+ infof(data, "Using ssh private key file %s\n", sshc->rsa);
+
+ state(conn, SSH_AUTH_PKEY);
+ }
+ else {
+ state(conn, SSH_AUTH_PASS_INIT);
+ }
+ break;
+
+ case SSH_AUTH_PKEY:
+ /* The function below checks if the files exists, no need to stat() here.
+ */
+ rc = libssh2_userauth_publickey_fromfile_ex(sshc->ssh_session,
+ conn->user,
+ curlx_uztoui(
+ strlen(conn->user)),
+ sshc->rsa_pub,
+ sshc->rsa, sshc->passphrase);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+
+ Curl_safefree(sshc->rsa_pub);
+ Curl_safefree(sshc->rsa);
+
+ if(rc == 0) {
+ sshc->authed = TRUE;
+ infof(data, "Initialized SSH public key authentication\n");
+ state(conn, SSH_AUTH_DONE);
+ }
+ else {
+ char *err_msg;
+ (void)libssh2_session_last_error(sshc->ssh_session,
+ &err_msg, NULL, 0);
+ infof(data, "SSH public key authentication failed: %s\n", err_msg);
+ state(conn, SSH_AUTH_PASS_INIT);
+ }
+ break;
+
+ case SSH_AUTH_PASS_INIT:
+ if((data->set.ssh_auth_types & CURLSSH_AUTH_PASSWORD) &&
+ (strstr(sshc->authlist, "password") != NULL)) {
+ state(conn, SSH_AUTH_PASS);
+ }
+ else {
+ state(conn, SSH_AUTH_HOST_INIT);
+ }
+ break;
+
+ case SSH_AUTH_PASS:
+ rc = libssh2_userauth_password_ex(sshc->ssh_session, conn->user,
+ curlx_uztoui(strlen(conn->user)),
+ conn->passwd,
+ curlx_uztoui(strlen(conn->passwd)),
+ NULL);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc == 0) {
+ sshc->authed = TRUE;
+ infof(data, "Initialized password authentication\n");
+ state(conn, SSH_AUTH_DONE);
+ }
+ else {
+ state(conn, SSH_AUTH_HOST_INIT);
+ }
+ break;
+
+ case SSH_AUTH_HOST_INIT:
+ if((data->set.ssh_auth_types & CURLSSH_AUTH_HOST) &&
+ (strstr(sshc->authlist, "hostbased") != NULL)) {
+ state(conn, SSH_AUTH_HOST);
+ }
+ else {
+ state(conn, SSH_AUTH_AGENT_INIT);
+ }
+ break;
+
+ case SSH_AUTH_HOST:
+ state(conn, SSH_AUTH_AGENT_INIT);
+ break;
+
+ case SSH_AUTH_AGENT_INIT:
+#ifdef HAVE_LIBSSH2_AGENT_API
+ if((data->set.ssh_auth_types & CURLSSH_AUTH_AGENT)
+ && (strstr(sshc->authlist, "publickey") != NULL)) {
+
+ /* Connect to the ssh-agent */
+ /* The agent could be shared by a curl thread i believe
+ but nothing obvious as keys can be added/removed at any time */
+ if(!sshc->ssh_agent) {
+ sshc->ssh_agent = libssh2_agent_init(sshc->ssh_session);
+ if(!sshc->ssh_agent) {
+ infof(data, "Could not create agent object\n");
+
+ state(conn, SSH_AUTH_KEY_INIT);
+ }
+ }
+
+ rc = libssh2_agent_connect(sshc->ssh_agent);
+ if(rc == LIBSSH2_ERROR_EAGAIN)
+ break;
+ if(rc < 0) {
+ infof(data, "Failure connecting to agent\n");
+ state(conn, SSH_AUTH_KEY_INIT);
+ }
+ else {
+ state(conn, SSH_AUTH_AGENT_LIST);
+ }
+ }
+ else
+#endif /* HAVE_LIBSSH2_AGENT_API */
+ state(conn, SSH_AUTH_KEY_INIT);
+ break;
+
+ case SSH_AUTH_AGENT_LIST:
+#ifdef HAVE_LIBSSH2_AGENT_API
+ rc = libssh2_agent_list_identities(sshc->ssh_agent);
+
+ if(rc == LIBSSH2_ERROR_EAGAIN)
+ break;
+ if(rc < 0) {
+ infof(data, "Failure requesting identities to agent\n");
+ state(conn, SSH_AUTH_KEY_INIT);
+ }
+ else {
+ state(conn, SSH_AUTH_AGENT);
+ sshc->sshagent_prev_identity = NULL;
+ }
+#endif
+ break;
+
+ case SSH_AUTH_AGENT:
+#ifdef HAVE_LIBSSH2_AGENT_API
+ /* as prev_identity evolves only after an identity user auth finished we
+ can safely request it again as long as EAGAIN is returned here or by
+ libssh2_agent_userauth */
+ rc = libssh2_agent_get_identity(sshc->ssh_agent,
+ &sshc->sshagent_identity,
+ sshc->sshagent_prev_identity);
+ if(rc == LIBSSH2_ERROR_EAGAIN)
+ break;
+
+ if(rc == 0) {
+ rc = libssh2_agent_userauth(sshc->ssh_agent, conn->user,
+ sshc->sshagent_identity);
+
+ if(rc < 0) {
+ if(rc != LIBSSH2_ERROR_EAGAIN) {
+ /* tried and failed? go to next identity */
+ sshc->sshagent_prev_identity = sshc->sshagent_identity;
+ }
+ break;
+ }
+ }
+
+ if(rc < 0)
+ infof(data, "Failure requesting identities to agent\n");
+ else if(rc == 1)
+ infof(data, "No identity would match\n");
+
+ if(rc == LIBSSH2_ERROR_NONE) {
+ sshc->authed = TRUE;
+ infof(data, "Agent based authentication successful\n");
+ state(conn, SSH_AUTH_DONE);
+ }
+ else
+ state(conn, SSH_AUTH_KEY_INIT);
+#endif
+ break;
+
+ case SSH_AUTH_KEY_INIT:
+ if((data->set.ssh_auth_types & CURLSSH_AUTH_KEYBOARD)
+ && (strstr(sshc->authlist, "keyboard-interactive") != NULL)) {
+ state(conn, SSH_AUTH_KEY);
+ }
+ else {
+ state(conn, SSH_AUTH_DONE);
+ }
+ break;
+
+ case SSH_AUTH_KEY:
+ /* Authentication failed. Continue with keyboard-interactive now. */
+ rc = libssh2_userauth_keyboard_interactive_ex(sshc->ssh_session,
+ conn->user,
+ curlx_uztoui(
+ strlen(conn->user)),
+ &kbd_callback);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc == 0) {
+ sshc->authed = TRUE;
+ infof(data, "Initialized keyboard interactive authentication\n");
+ }
+ state(conn, SSH_AUTH_DONE);
+ break;
+
+ case SSH_AUTH_DONE:
+ if(!sshc->authed) {
+ failf(data, "Authentication failure");
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_LOGIN_DENIED;
+ break;
+ }
+
+ /*
+ * At this point we have an authenticated ssh session.
+ */
+ infof(data, "Authentication complete\n");
+
+ Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSH is connected */
+
+ conn->sockfd = sock;
+ conn->writesockfd = CURL_SOCKET_BAD;
+
+ if(conn->handler->protocol == CURLPROTO_SFTP) {
+ state(conn, SSH_SFTP_INIT);
+ break;
+ }
+ infof(data, "SSH CONNECT phase done\n");
+ state(conn, SSH_STOP);
+ break;
+
+ case SSH_SFTP_INIT:
+ /*
+ * Start the libssh2 sftp session
+ */
+ sshc->sftp_session = libssh2_sftp_init(sshc->ssh_session);
+ if(!sshc->sftp_session) {
+ if(libssh2_session_last_errno(sshc->ssh_session) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ char *err_msg;
+
+ (void)libssh2_session_last_error(sshc->ssh_session,
+ &err_msg, NULL, 0);
+ failf(data, "Failure initializing sftp session: %s", err_msg);
+ state(conn, SSH_SESSION_FREE);
+ sshc->actualcode = CURLE_FAILED_INIT;
+ break;
+ }
+ }
+ state(conn, SSH_SFTP_REALPATH);
+ break;
+
+ case SSH_SFTP_REALPATH:
+ {
+ char tempHome[PATH_MAX];
+
+ /*
+ * Get the "home" directory
+ */
+ rc = sftp_libssh2_realpath(sshc->sftp_session, ".",
+ tempHome, PATH_MAX-1);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc > 0) {
+ /* It seems that this string is not always NULL terminated */
+ tempHome[rc] = '\0';
+ sshc->homedir = strdup(tempHome);
+ if(!sshc->homedir) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ conn->data->state.most_recent_ftp_entrypath = sshc->homedir;
+ }
+ else {
+ /* Return the error type */
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ result = sftp_libssh2_error_to_CURLE(err);
+ sshc->actualcode = result?result:CURLE_SSH;
+ DEBUGF(infof(data, "error = %d makes libcurl = %d\n",
+ err, (int)result));
+ state(conn, SSH_STOP);
+ break;
+ }
+ }
+ /* This is the last step in the SFTP connect phase. Do note that while
+ we get the homedir here, we get the "workingpath" in the DO action
+ since the homedir will remain the same between request but the
+ working path will not. */
+ DEBUGF(infof(data, "SSH CONNECT phase done\n"));
+ state(conn, SSH_STOP);
+ break;
+
+ case SSH_SFTP_QUOTE_INIT:
+
+ result = ssh_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_TRANS_INIT);
+ }
+ break;
+
+ case SSH_SFTP_POSTQUOTE_INIT:
+ if(data->set.postquote) {
+ infof(data, "Sending quote commands\n");
+ sshc->quote_item = data->set.postquote;
+ state(conn, SSH_SFTP_QUOTE);
+ }
+ else {
+ state(conn, SSH_STOP);
+ }
+ break;
+
+ case SSH_SFTP_QUOTE:
+ /* Send any quote commands */
+ {
+ const char *cp;
+
+ /*
+ * Support some of the "FTP" commands
+ */
+ char *cmd = sshc->quote_item->data;
+ sshc->acceptfail = FALSE;
+
+ /* if a command starts with an asterisk, which a legal SFTP command never
+ can, the command will be allowed to fail without it causing any
+ aborts or cancels etc. It will cause libcurl to act as if the command
+ is successful, whatever the server reponds. */
+
+ if(cmd[0] == '*') {
+ cmd++;
+ sshc->acceptfail = TRUE;
+ }
+
+ if(curl_strequal("pwd", cmd)) {
+ /* output debug output if that is requested */
+ char *tmp = aprintf("257 \"%s\" is current directory.\n",
+ sftp_scp->path);
+ if(!tmp) {
+ result = CURLE_OUT_OF_MEMORY;
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ break;
+ }
+ if(data->set.verbose) {
+ Curl_debug(data, CURLINFO_HEADER_OUT, (char *)"PWD\n", 4, conn);
+ Curl_debug(data, CURLINFO_HEADER_IN, tmp, strlen(tmp), conn);
+ }
+ /* this sends an FTP-like "header" to the header callback so that the
+ current directory can be read very similar to how it is read when
+ using ordinary FTP. */
+ result = Curl_client_write(conn, CLIENTWRITE_HEADER, tmp, strlen(tmp));
+ free(tmp);
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+ }
+ else if(cmd) {
+ /*
+ * the arguments following the command must be separated from the
+ * command with a space so we can check for it unconditionally
+ */
+ cp = strchr(cmd, ' ');
+ if(cp == NULL) {
+ failf(data, "Syntax error in SFTP command. Supply parameter(s)!");
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+
+ /*
+ * also, every command takes at least one argument so we get that
+ * first argument right now
+ */
+ result = get_pathname(&cp, &sshc->quote_path1);
+ if(result) {
+ if(result == CURLE_OUT_OF_MEMORY)
+ failf(data, "Out of memory");
+ else
+ failf(data, "Syntax error: Bad first parameter");
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = result;
+ break;
+ }
+
+ /*
+ * SFTP is a binary protocol, so we don't send text commands to
+ * the server. Instead, we scan for commands for commands used by
+ * OpenSSH's sftp program and call the appropriate libssh2
+ * functions.
+ */
+ if(curl_strnequal(cmd, "chgrp ", 6) ||
+ curl_strnequal(cmd, "chmod ", 6) ||
+ curl_strnequal(cmd, "chown ", 6) ) {
+ /* attribute change */
+
+ /* sshc->quote_path1 contains the mode to set */
+ /* get the destination */
+ result = get_pathname(&cp, &sshc->quote_path2);
+ if(result) {
+ if(result == CURLE_OUT_OF_MEMORY)
+ failf(data, "Out of memory");
+ else
+ failf(data, "Syntax error in chgrp/chmod/chown: "
+ "Bad second parameter");
+ Curl_safefree(sshc->quote_path1);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = result;
+ break;
+ }
+ memset(&sshc->quote_attrs, 0, sizeof(LIBSSH2_SFTP_ATTRIBUTES));
+ state(conn, SSH_SFTP_QUOTE_STAT);
+ break;
+ }
+ else if(curl_strnequal(cmd, "ln ", 3) ||
+ curl_strnequal(cmd, "symlink ", 8)) {
+ /* symbolic linking */
+ /* sshc->quote_path1 is the source */
+ /* get the destination */
+ result = get_pathname(&cp, &sshc->quote_path2);
+ if(result) {
+ if(result == CURLE_OUT_OF_MEMORY)
+ failf(data, "Out of memory");
+ else
+ failf(data,
+ "Syntax error in ln/symlink: Bad second parameter");
+ Curl_safefree(sshc->quote_path1);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = result;
+ break;
+ }
+ state(conn, SSH_SFTP_QUOTE_SYMLINK);
+ break;
+ }
+ else if(curl_strnequal(cmd, "mkdir ", 6)) {
+ /* create dir */
+ state(conn, SSH_SFTP_QUOTE_MKDIR);
+ break;
+ }
+ else if(curl_strnequal(cmd, "rename ", 7)) {
+ /* rename file */
+ /* first param is the source path */
+ /* second param is the dest. path */
+ result = get_pathname(&cp, &sshc->quote_path2);
+ if(result) {
+ if(result == CURLE_OUT_OF_MEMORY)
+ failf(data, "Out of memory");
+ else
+ failf(data, "Syntax error in rename: Bad second parameter");
+ Curl_safefree(sshc->quote_path1);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = result;
+ break;
+ }
+ state(conn, SSH_SFTP_QUOTE_RENAME);
+ break;
+ }
+ else if(curl_strnequal(cmd, "rmdir ", 6)) {
+ /* delete dir */
+ state(conn, SSH_SFTP_QUOTE_RMDIR);
+ break;
+ }
+ else if(curl_strnequal(cmd, "rm ", 3)) {
+ state(conn, SSH_SFTP_QUOTE_UNLINK);
+ break;
+ }
+
+ failf(data, "Unknown SFTP command");
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ }
+ if(!sshc->quote_item) {
+ state(conn, SSH_SFTP_TRANS_INIT);
+ }
+ break;
+
+ case SSH_SFTP_NEXT_QUOTE:
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+
+ sshc->quote_item = sshc->quote_item->next;
+
+ if(sshc->quote_item) {
+ state(conn, SSH_SFTP_QUOTE);
+ }
+ else {
+ if(sshc->nextstate != SSH_NO_STATE) {
+ state(conn, sshc->nextstate);
+ sshc->nextstate = SSH_NO_STATE;
+ }
+ else {
+ state(conn, SSH_SFTP_TRANS_INIT);
+ }
+ }
+ break;
+
+ case SSH_SFTP_QUOTE_STAT:
+ {
+ char *cmd = sshc->quote_item->data;
+ sshc->acceptfail = FALSE;
+
+ /* if a command starts with an asterisk, which a legal SFTP command never
+ can, the command will be allowed to fail without it causing any
+ aborts or cancels etc. It will cause libcurl to act as if the command
+ is successful, whatever the server reponds. */
+
+ if(cmd[0] == '*') {
+ cmd++;
+ sshc->acceptfail = TRUE;
+ }
+
+ if(!curl_strnequal(cmd, "chmod", 5)) {
+ /* Since chown and chgrp only set owner OR group but libssh2 wants to
+ * set them both at once, we need to obtain the current ownership
+ * first. This takes an extra protocol round trip.
+ */
+ rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
+ curlx_uztoui(strlen(sshc->quote_path2)),
+ LIBSSH2_SFTP_STAT,
+ &sshc->quote_attrs);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) { /* get those attributes */
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "Attempt to get SFTP stats failed: %s",
+ sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ }
+
+ /* Now set the new attributes... */
+ if(curl_strnequal(cmd, "chgrp", 5)) {
+ sshc->quote_attrs.gid = strtoul(sshc->quote_path1, NULL, 10);
+ sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+ if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+ !sshc->acceptfail) {
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "Syntax error: chgrp gid not a number");
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ }
+ else if(curl_strnequal(cmd, "chmod", 5)) {
+ sshc->quote_attrs.permissions = strtoul(sshc->quote_path1, NULL, 8);
+ sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_PERMISSIONS;
+ /* permissions are octal */
+ if(sshc->quote_attrs.permissions == 0 &&
+ !ISDIGIT(sshc->quote_path1[0])) {
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "Syntax error: chmod permissions not a number");
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ }
+ else if(curl_strnequal(cmd, "chown", 5)) {
+ sshc->quote_attrs.uid = strtoul(sshc->quote_path1, NULL, 10);
+ sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+ if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+ !sshc->acceptfail) {
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "Syntax error: chown uid not a number");
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ }
+
+ /* Now send the completed structure... */
+ state(conn, SSH_SFTP_QUOTE_SETSTAT);
+ break;
+ }
+
+ case SSH_SFTP_QUOTE_SETSTAT:
+ rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
+ curlx_uztoui(strlen(sshc->quote_path2)),
+ LIBSSH2_SFTP_SETSTAT,
+ &sshc->quote_attrs);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "Attempt to set SFTP stats failed: %s",
+ sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_QUOTE_SYMLINK:
+ rc = libssh2_sftp_symlink_ex(sshc->sftp_session, sshc->quote_path1,
+ curlx_uztoui(strlen(sshc->quote_path1)),
+ sshc->quote_path2,
+ curlx_uztoui(strlen(sshc->quote_path2)),
+ LIBSSH2_SFTP_SYMLINK);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "symlink command failed: %s",
+ sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_QUOTE_MKDIR:
+ rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sshc->quote_path1,
+ curlx_uztoui(strlen(sshc->quote_path1)),
+ data->set.new_directory_perms);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ failf(data, "mkdir command failed: %s", sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_QUOTE_RENAME:
+ rc = libssh2_sftp_rename_ex(sshc->sftp_session, sshc->quote_path1,
+ curlx_uztoui(strlen(sshc->quote_path1)),
+ sshc->quote_path2,
+ curlx_uztoui(strlen(sshc->quote_path2)),
+ LIBSSH2_SFTP_RENAME_OVERWRITE |
+ LIBSSH2_SFTP_RENAME_ATOMIC |
+ LIBSSH2_SFTP_RENAME_NATIVE);
+
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+ failf(data, "rename command failed: %s", sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_QUOTE_RMDIR:
+ rc = libssh2_sftp_rmdir_ex(sshc->sftp_session, sshc->quote_path1,
+ curlx_uztoui(strlen(sshc->quote_path1)));
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ failf(data, "rmdir command failed: %s", sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_QUOTE_UNLINK:
+ rc = libssh2_sftp_unlink_ex(sshc->sftp_session, sshc->quote_path1,
+ curlx_uztoui(strlen(sshc->quote_path1)));
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc != 0 && !sshc->acceptfail) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ Curl_safefree(sshc->quote_path1);
+ failf(data, "rm command failed: %s", sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->nextstate = SSH_NO_STATE;
+ sshc->actualcode = CURLE_QUOTE_ERROR;
+ break;
+ }
+ state(conn, SSH_SFTP_NEXT_QUOTE);
+ break;
+
+ case SSH_SFTP_TRANS_INIT:
+ if(data->set.upload)
+ state(conn, SSH_SFTP_UPLOAD_INIT);
+ else {
+ if(data->set.opt_no_body)
+ state(conn, SSH_STOP);
+ 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:
+ {
+ unsigned long flags;
+ /*
+ * NOTE!!! libssh2 requires that the destination path is a full path
+ * that includes the destination file and name OR ends in a "/"
+ * If this is not done the destination file will be named the
+ * same name as the last directory in the path.
+ */
+
+ if(data->state.resume_from != 0) {
+ LIBSSH2_SFTP_ATTRIBUTES attrs;
+ if(data->state.resume_from < 0) {
+ rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
+ curlx_uztoui(strlen(sftp_scp->path)),
+ LIBSSH2_SFTP_STAT, &attrs);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ data->state.resume_from = 0;
+ }
+ else {
+ curl_off_t size = attrs.filesize;
+ if(size < 0) {
+ failf(data, "Bad file size (%" FORMAT_OFF_T ")", size);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ data->state.resume_from = attrs.filesize;
+ }
+ }
+ }
+
+ if(data->set.ftp_append)
+ /* Try to open for append, but create if nonexisting */
+ flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_APPEND;
+ else if(data->state.resume_from > 0)
+ /* If we have restart position then open for append */
+ flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_APPEND;
+ else
+ /* Clear file before writing (normal behaviour) */
+ flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC;
+
+ sshc->sftp_handle =
+ libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
+ curlx_uztoui(strlen(sftp_scp->path)),
+ flags, data->set.new_file_perms,
+ LIBSSH2_SFTP_OPENFILE);
+
+ if(!sshc->sftp_handle) {
+ rc = libssh2_session_last_errno(sshc->ssh_session);
+
+ if(LIBSSH2_ERROR_EAGAIN == rc)
+ break;
+ else {
+ if(LIBSSH2_ERROR_SFTP_PROTOCOL == rc)
+ /* only when there was an SFTP protocol error can we extract
+ the sftp error! */
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ else
+ err = -1; /* not an sftp error at all */
+
+ if(sshc->secondCreateDirs) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = err>= LIBSSH2_FX_OK?
+ sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
+ failf(data, "Creating the dir/file failed: %s",
+ sftp_libssh2_strerror(err));
+ break;
+ }
+ else if(((err == LIBSSH2_FX_NO_SUCH_FILE) ||
+ (err == LIBSSH2_FX_FAILURE) ||
+ (err == LIBSSH2_FX_NO_SUCH_PATH)) &&
+ (data->set.ftp_create_missing_dirs &&
+ (strlen(sftp_scp->path) > 1))) {
+ /* try to create the path remotely */
+ sshc->secondCreateDirs = 1;
+ state(conn, SSH_SFTP_CREATE_DIRS_INIT);
+ break;
+ }
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = err>= LIBSSH2_FX_OK?
+ sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
+ if(!sshc->actualcode) {
+ /* Sometimes, for some reason libssh2_sftp_last_error() returns
+ zero even though libssh2_sftp_open() failed previously! We need
+ to work around that! */
+ sshc->actualcode = CURLE_SSH;
+ err=-1;
+ }
+ failf(data, "Upload failed: %s (%d/%d)",
+ err>= LIBSSH2_FX_OK?sftp_libssh2_strerror(err):"ssh error",
+ err, rc);
+ break;
+ }
+ }
+
+ /* If we have 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. */
+ if(conn->seek_func) {
+ seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
+ SEEK_SET);
+ }
+
+ if(seekerr != CURL_SEEKFUNC_OK) {
+
+ 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) */
+ else {
+ curl_off_t passed=0;
+ do {
+ size_t readthisamountnow =
+ (data->state.resume_from - passed > CURL_OFF_T_C(BUFSIZE)) ?
+ BUFSIZE : curlx_sotouz(data->state.resume_from - passed);
+
+ size_t actuallyread =
+ conn->fread_func(data->state.buffer, 1, readthisamountnow,
+ conn->fread_in);
+
+ 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->set.infilesize > 0) {
+ data->set.infilesize -= data->state.resume_from;
+ data->req.size = data->set.infilesize;
+ Curl_pgrsSetUploadSize(data, data->set.infilesize);
+ }
+
+ SFTP_SEEK(sshc->sftp_handle, data->state.resume_from);
+ }
+ if(data->set.infilesize > 0) {
+ data->req.size = data->set.infilesize;
+ Curl_pgrsSetUploadSize(data, data->set.infilesize);
+ }
+ /* upload data */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
+
+ /* 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, 1);
+
+ state(conn, SSH_STOP);
+ }
+ break;
+ }
+
+ case SSH_SFTP_CREATE_DIRS_INIT:
+ if(strlen(sftp_scp->path) > 1) {
+ sshc->slash_pos = sftp_scp->path + 1; /* ignore the leading '/' */
+ state(conn, SSH_SFTP_CREATE_DIRS);
+ }
+ else {
+ state(conn, SSH_SFTP_UPLOAD_INIT);
+ }
+ break;
+
+ case SSH_SFTP_CREATE_DIRS:
+ if((sshc->slash_pos = strchr(sshc->slash_pos, '/')) != NULL) {
+ *sshc->slash_pos = 0;
+
+ infof(data, "Creating directory '%s'\n", sftp_scp->path);
+ state(conn, SSH_SFTP_CREATE_DIRS_MKDIR);
+ break;
+ }
+ else {
+ state(conn, SSH_SFTP_UPLOAD_INIT);
+ }
+ break;
+
+ case SSH_SFTP_CREATE_DIRS_MKDIR:
+ /* 'mode' - parameter is preliminary - default to 0644 */
+ rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sftp_scp->path,
+ curlx_uztoui(strlen(sftp_scp->path)),
+ data->set.new_directory_perms);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ *sshc->slash_pos = '/';
+ ++sshc->slash_pos;
+ if(rc == -1) {
+ /*
+ * Abort if failure wasn't that the dir already exists or the
+ * permission was denied (creation might succeed further down the
+ * path) - retry on unspecific FAILURE also
+ */
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ if((err != LIBSSH2_FX_FILE_ALREADY_EXISTS) &&
+ (err != LIBSSH2_FX_FAILURE) &&
+ (err != LIBSSH2_FX_PERMISSION_DENIED)) {
+ result = sftp_libssh2_error_to_CURLE(err);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = result?result:CURLE_SSH;
+ break;
+ }
+ }
+ state(conn, SSH_SFTP_CREATE_DIRS);
+ break;
+
+ case SSH_SFTP_READDIR_INIT:
+ /*
+ * This is a directory that we are trying to get, so produce a directory
+ * listing
+ */
+ sshc->sftp_handle = libssh2_sftp_open_ex(sshc->sftp_session,
+ sftp_scp->path,
+ curlx_uztoui(
+ strlen(sftp_scp->path)),
+ 0, 0, LIBSSH2_SFTP_OPENDIR);
+ if(!sshc->sftp_handle) {
+ if(libssh2_session_last_errno(sshc->ssh_session) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ failf(data, "Could not open directory for reading: %s",
+ sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ result = sftp_libssh2_error_to_CURLE(err);
+ sshc->actualcode = result?result:CURLE_SSH;
+ break;
+ }
+ }
+ if((sshc->readdir_filename = malloc(PATH_MAX+1)) == NULL) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ if((sshc->readdir_longentry = malloc(PATH_MAX+1)) == NULL) {
+ Curl_safefree(sshc->readdir_filename);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ state(conn, SSH_SFTP_READDIR);
+ break;
+
+ case SSH_SFTP_READDIR:
+ sshc->readdir_len = libssh2_sftp_readdir_ex(sshc->sftp_handle,
+ sshc->readdir_filename,
+ PATH_MAX,
+ sshc->readdir_longentry,
+ PATH_MAX,
+ &sshc->readdir_attrs);
+ if(sshc->readdir_len == LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ if(sshc->readdir_len > 0) {
+ sshc->readdir_filename[sshc->readdir_len] = '\0';
+
+ if(data->set.ftp_list_only) {
+ char *tmpLine;
+
+ tmpLine = aprintf("%s\n", sshc->readdir_filename);
+ if(tmpLine == NULL) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ result = Curl_client_write(conn, CLIENTWRITE_BODY,
+ tmpLine, sshc->readdir_len+1);
+ Curl_safefree(tmpLine);
+
+ if(result) {
+ state(conn, SSH_STOP);
+ break;
+ }
+ /* since this counts what we send to the client, we include the
+ newline in this counter */
+ data->req.bytecount += sshc->readdir_len+1;
+
+ /* output debug output if that is requested */
+ if(data->set.verbose) {
+ Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_filename,
+ sshc->readdir_len, conn);
+ }
+ }
+ else {
+ sshc->readdir_currLen = (int)strlen(sshc->readdir_longentry);
+ sshc->readdir_totalLen = 80 + sshc->readdir_currLen;
+ sshc->readdir_line = calloc(sshc->readdir_totalLen, 1);
+ if(!sshc->readdir_line) {
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+
+ memcpy(sshc->readdir_line, sshc->readdir_longentry,
+ sshc->readdir_currLen);
+ if((sshc->readdir_attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) &&
+ ((sshc->readdir_attrs.permissions & LIBSSH2_SFTP_S_IFMT) ==
+ LIBSSH2_SFTP_S_IFLNK)) {
+ sshc->readdir_linkPath = malloc(PATH_MAX + 1);
+ if(sshc->readdir_linkPath == NULL) {
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+
+ snprintf(sshc->readdir_linkPath, PATH_MAX, "%s%s", sftp_scp->path,
+ sshc->readdir_filename);
+ state(conn, SSH_SFTP_READDIR_LINK);
+ break;
+ }
+ state(conn, SSH_SFTP_READDIR_BOTTOM);
+ break;
+ }
+ }
+ else if(sshc->readdir_len == 0) {
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ state(conn, SSH_SFTP_READDIR_DONE);
+ break;
+ }
+ else if(sshc->readdir_len <= 0) {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ result = sftp_libssh2_error_to_CURLE(err);
+ sshc->actualcode = result?result:CURLE_SSH;
+ failf(data, "Could not open remote file for reading: %s :: %d",
+ sftp_libssh2_strerror(err),
+ libssh2_session_last_errno(sshc->ssh_session));
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ state(conn, SSH_SFTP_CLOSE);
+ break;
+ }
+ break;
+
+ case SSH_SFTP_READDIR_LINK:
+ sshc->readdir_len =
+ libssh2_sftp_symlink_ex(sshc->sftp_session,
+ sshc->readdir_linkPath,
+ curlx_uztoui(strlen(sshc->readdir_linkPath)),
+ sshc->readdir_filename,
+ PATH_MAX, LIBSSH2_SFTP_READLINK);
+ if(sshc->readdir_len == LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ Curl_safefree(sshc->readdir_linkPath);
+
+ /* get room for the filename and extra output */
+ sshc->readdir_totalLen += 4 + sshc->readdir_len;
+ new_readdir_line = realloc(sshc->readdir_line, sshc->readdir_totalLen);
+ if(!new_readdir_line) {
+ Curl_safefree(sshc->readdir_line);
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ sshc->readdir_line = new_readdir_line;
+
+ sshc->readdir_currLen += snprintf(sshc->readdir_line +
+ sshc->readdir_currLen,
+ sshc->readdir_totalLen -
+ sshc->readdir_currLen,
+ " -> %s",
+ sshc->readdir_filename);
+
+ state(conn, SSH_SFTP_READDIR_BOTTOM);
+ break;
+
+ case SSH_SFTP_READDIR_BOTTOM:
+ sshc->readdir_currLen += snprintf(sshc->readdir_line +
+ sshc->readdir_currLen,
+ sshc->readdir_totalLen -
+ sshc->readdir_currLen, "\n");
+ result = Curl_client_write(conn, CLIENTWRITE_BODY,
+ sshc->readdir_line,
+ sshc->readdir_currLen);
+
+ if(result == CURLE_OK) {
+
+ /* output debug output if that is requested */
+ if(data->set.verbose) {
+ Curl_debug(data, CURLINFO_DATA_OUT, sshc->readdir_line,
+ sshc->readdir_currLen, conn);
+ }
+ data->req.bytecount += sshc->readdir_currLen;
+ }
+ Curl_safefree(sshc->readdir_line);
+ if(result) {
+ state(conn, SSH_STOP);
+ }
+ else
+ state(conn, SSH_SFTP_READDIR);
+ break;
+
+ case SSH_SFTP_READDIR_DONE:
+ if(libssh2_sftp_closedir(sshc->sftp_handle) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ sshc->sftp_handle = NULL;
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+
+ /* no data to transfer */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
+ state(conn, SSH_STOP);
+ break;
+
+ case SSH_SFTP_DOWNLOAD_INIT:
+ /*
+ * Work on getting the specified file
+ */
+ sshc->sftp_handle =
+ libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
+ curlx_uztoui(strlen(sftp_scp->path)),
+ LIBSSH2_FXF_READ, data->set.new_file_perms,
+ LIBSSH2_SFTP_OPENFILE);
+ if(!sshc->sftp_handle) {
+ if(libssh2_session_last_errno(sshc->ssh_session) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ err = sftp_libssh2_last_error(sshc->sftp_session);
+ failf(data, "Could not open remote file for reading: %s",
+ sftp_libssh2_strerror(err));
+ state(conn, SSH_SFTP_CLOSE);
+ result = sftp_libssh2_error_to_CURLE(err);
+ sshc->actualcode = result?result:CURLE_SSH;
+ break;
+ }
+ }
+ state(conn, SSH_SFTP_DOWNLOAD_STAT);
+ break;
+
+ case SSH_SFTP_DOWNLOAD_STAT:
+ {
+ LIBSSH2_SFTP_ATTRIBUTES attrs;
+
+ rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
+ curlx_uztoui(strlen(sftp_scp->path)),
+ LIBSSH2_SFTP_STAT, &attrs);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ /*
+ * libssh2_sftp_open() didn't return an error, so maybe the server
+ * just doesn't support stat()
+ */
+ data->req.size = -1;
+ data->req.maxdownload = -1;
+ }
+ else {
+ curl_off_t size = attrs.filesize;
+
+ if(size < 0) {
+ failf(data, "Bad file size (%" FORMAT_OFF_T ")", size);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ if(conn->data->state.use_range) {
+ curl_off_t from, to;
+ char *ptr;
+ char *ptr2;
+
+ from=curlx_strtoofft(conn->data->state.range, &ptr, 0);
+ while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
+ ptr++;
+ to=curlx_strtoofft(ptr, &ptr2, 0);
+ if((ptr == ptr2) /* no "to" value given */
+ || (to >= size)) {
+ to = size - 1;
+ }
+ if(from < 0) {
+ /* from is relative to end of file */
+ from += size;
+ }
+ if(from >= size) {
+ failf(data, "Offset (%"
+ FORMAT_OFF_T ") was beyond file size (%" FORMAT_OFF_T ")",
+ from, attrs.filesize);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ if(from > to) {
+ from = to;
+ size = 0;
+ }
+ else {
+ size = to - from + 1;
+ }
+
+ SFTP_SEEK(conn->proto.sshc.sftp_handle, from);
+ }
+ data->req.size = size;
+ data->req.maxdownload = size;
+ Curl_pgrsSetDownloadSize(data, size);
+ }
+
+ /* We can resume if we can seek to the resume position */
+ if(data->state.resume_from) {
+ if(data->state.resume_from < 0) {
+ /* We're supposed to download the last abs(from) bytes */
+ if((curl_off_t)attrs.filesize < -data->state.resume_from) {
+ failf(data, "Offset (%"
+ FORMAT_OFF_T ") was beyond file size (%" FORMAT_OFF_T ")",
+ data->state.resume_from, attrs.filesize);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ /* download from where? */
+ data->state.resume_from += attrs.filesize;
+ }
+ else {
+ if((curl_off_t)attrs.filesize < data->state.resume_from) {
+ failf(data, "Offset (%" FORMAT_OFF_T
+ ") was beyond file size (%" FORMAT_OFF_T ")",
+ data->state.resume_from, attrs.filesize);
+ return CURLE_BAD_DOWNLOAD_RESUME;
+ }
+ }
+ /* Does a completed file need to be seeked and started or closed ? */
+ /* Now store the number of bytes we are expected to download */
+ data->req.size = attrs.filesize - data->state.resume_from;
+ data->req.maxdownload = attrs.filesize - data->state.resume_from;
+ Curl_pgrsSetDownloadSize(data,
+ attrs.filesize - data->state.resume_from);
+ SFTP_SEEK(sshc->sftp_handle, data->state.resume_from);
+ }
+ }
+ /* Setup the actual download */
+ if(data->req.size == 0) {
+ /* no data to transfer */
+ Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
+ infof(data, "File already completely downloaded\n");
+ state(conn, SSH_STOP);
+ break;
+ }
+ else {
+ Curl_setup_transfer(conn, FIRSTSOCKET, data->req.size,
+ FALSE, NULL, -1, NULL);
+
+ /* 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) {
+ state(conn, SSH_SFTP_CLOSE);
+ sshc->actualcode = result;
+ }
+ else {
+ state(conn, SSH_STOP);
+ }
+ break;
+
+ case SSH_SFTP_CLOSE:
+ if(sshc->sftp_handle) {
+ rc = libssh2_sftp_close(sshc->sftp_handle);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to close libssh2 file\n");
+ }
+ sshc->sftp_handle = NULL;
+ }
+ if(sftp_scp)
+ Curl_safefree(sftp_scp->path);
+
+ DEBUGF(infof(data, "SFTP DONE done\n"));
+
+ /* Check if nextstate is set and move .nextstate could be POSTQUOTE_INIT
+ After nextstate is executed,the control should come back to
+ SSH_SFTP_CLOSE to pass the correct result back */
+ if(sshc->nextstate != SSH_NO_STATE) {
+ state(conn, sshc->nextstate);
+ sshc->nextstate = SSH_SFTP_CLOSE;
+ }
+ else {
+ state(conn, SSH_STOP);
+ result = sshc->actualcode;
+ }
+ break;
+
+ case SSH_SFTP_SHUTDOWN:
+ /* during times we get here due to a broken transfer and then the
+ sftp_handle might not have been taken down so make sure that is done
+ before we proceed */
+
+ if(sshc->sftp_handle) {
+ rc = libssh2_sftp_close(sshc->sftp_handle);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to close libssh2 file\n");
+ }
+ sshc->sftp_handle = NULL;
+ }
+ if(sshc->sftp_session) {
+ rc = libssh2_sftp_shutdown(sshc->sftp_session);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to stop libssh2 sftp subsystem\n");
+ }
+ sshc->sftp_session = NULL;
+ }
+
+ Curl_safefree(sshc->homedir);
+ conn->data->state.most_recent_ftp_entrypath = NULL;
+
+ state(conn, SSH_SESSION_DISCONNECT);
+ break;
+
+ case SSH_SCP_TRANS_INIT:
+ result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
+ if(result) {
+ sshc->actualcode = result;
+ state(conn, SSH_STOP);
+ break;
+ }
+
+ if(data->set.upload) {
+ if(data->set.infilesize < 0) {
+ failf(data, "SCP requires a known file size for upload");
+ sshc->actualcode = CURLE_UPLOAD_FAILED;
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ break;
+ }
+ state(conn, SSH_SCP_UPLOAD_INIT);
+ }
+ else {
+ state(conn, SSH_SCP_DOWNLOAD_INIT);
+ }
+ break;
+
+ case SSH_SCP_UPLOAD_INIT:
+ /*
+ * libssh2 requires that the destination path is a full path that
+ * includes the destination file and name OR ends in a "/" . If this is
+ * not done the destination file will be named the same name as the last
+ * directory in the path.
+ */
+ sshc->ssh_channel =
+ SCP_SEND(sshc->ssh_session, sftp_scp->path, data->set.new_file_perms,
+ data->set.infilesize);
+ if(!sshc->ssh_channel) {
+ if(libssh2_session_last_errno(sshc->ssh_session) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ int ssh_err;
+ char *err_msg;
+
+ ssh_err = (int)(libssh2_session_last_error(sshc->ssh_session,
+ &err_msg, NULL, 0));
+ failf(conn->data, "%s", err_msg);
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
+ break;
+ }
+ }
+
+ /* upload data */
+ Curl_setup_transfer(conn, -1, data->req.size, FALSE, NULL,
+ FIRSTSOCKET, NULL);
+
+ /* not set by Curl_setup_transfer to preserve keepon bits */
+ conn->sockfd = conn->writesockfd;
+
+ if(result) {
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ 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 scp send function will deal
+ with both accordingly */
+ conn->cselect_bits = CURL_CSELECT_OUT;
+
+ state(conn, SSH_STOP);
+ }
+ break;
+
+ case SSH_SCP_DOWNLOAD_INIT:
+ {
+ /*
+ * We must check the remote file; if it is a directory no values will
+ * be set in sb
+ */
+ struct stat sb;
+ curl_off_t bytecount;
+
+ /* clear the struct scp recv will fill in */
+ memset(&sb, 0, sizeof(struct stat));
+
+ /* get a fresh new channel from the ssh layer */
+ sshc->ssh_channel = libssh2_scp_recv(sshc->ssh_session,
+ sftp_scp->path, &sb);
+ if(!sshc->ssh_channel) {
+ if(libssh2_session_last_errno(sshc->ssh_session) ==
+ LIBSSH2_ERROR_EAGAIN) {
+ rc = LIBSSH2_ERROR_EAGAIN;
+ break;
+ }
+ else {
+ int ssh_err;
+ char *err_msg;
+
+ ssh_err = (int)(libssh2_session_last_error(sshc->ssh_session,
+ &err_msg, NULL, 0));
+ failf(conn->data, "%s", err_msg);
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ sshc->actualcode = libssh2_session_error_to_CURLE(ssh_err);
+ break;
+ }
+ }
+
+ /* download data */
+ bytecount = (curl_off_t)sb.st_size;
+ data->req.maxdownload = (curl_off_t)sb.st_size;
+ Curl_setup_transfer(conn, FIRSTSOCKET, bytecount, FALSE, NULL, -1, NULL);
+
+ /* 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) {
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ sshc->actualcode = result;
+ }
+ else
+ state(conn, SSH_STOP);
+ }
+ break;
+
+ case SSH_SCP_DONE:
+ if(data->set.upload)
+ state(conn, SSH_SCP_SEND_EOF);
+ else
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ break;
+
+ case SSH_SCP_SEND_EOF:
+ if(sshc->ssh_channel) {
+ rc = libssh2_channel_send_eof(sshc->ssh_channel);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ infof(data, "Failed to send libssh2 channel EOF\n");
+ }
+ }
+ state(conn, SSH_SCP_WAIT_EOF);
+ break;
+
+ case SSH_SCP_WAIT_EOF:
+ if(sshc->ssh_channel) {
+ rc = libssh2_channel_wait_eof(sshc->ssh_channel);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ infof(data, "Failed to get channel EOF: %d\n", rc);
+ }
+ }
+ state(conn, SSH_SCP_WAIT_CLOSE);
+ break;
+
+ case SSH_SCP_WAIT_CLOSE:
+ if(sshc->ssh_channel) {
+ rc = libssh2_channel_wait_closed(sshc->ssh_channel);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc) {
+ infof(data, "Channel failed to close: %d\n", rc);
+ }
+ }
+ state(conn, SSH_SCP_CHANNEL_FREE);
+ break;
+
+ case SSH_SCP_CHANNEL_FREE:
+ if(sshc->ssh_channel) {
+ rc = libssh2_channel_free(sshc->ssh_channel);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to free libssh2 scp subsystem\n");
+ }
+ sshc->ssh_channel = NULL;
+ }
+ DEBUGF(infof(data, "SCP DONE phase complete\n"));
+#if 0 /* PREV */
+ state(conn, SSH_SESSION_DISCONNECT);
+#endif
+ state(conn, SSH_STOP);
+ result = sshc->actualcode;
+ break;
+
+ case SSH_SESSION_DISCONNECT:
+ /* during weird times when we've been prematurely aborted, the channel
+ is still alive when we reach this state and we MUST kill the channel
+ properly first */
+ if(sshc->ssh_channel) {
+ rc = libssh2_channel_free(sshc->ssh_channel);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to free libssh2 scp subsystem\n");
+ }
+ sshc->ssh_channel = NULL;
+ }
+
+ if(sshc->ssh_session) {
+ rc = libssh2_session_disconnect(sshc->ssh_session, "Shutdown");
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to disconnect libssh2 session\n");
+ }
+ }
+
+ Curl_safefree(sshc->homedir);
+ conn->data->state.most_recent_ftp_entrypath = NULL;
+
+ state(conn, SSH_SESSION_FREE);
+ break;
+
+ case SSH_SESSION_FREE:
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+ if(sshc->kh) {
+ libssh2_knownhost_free(sshc->kh);
+ sshc->kh = NULL;
+ }
+#endif
+
+#ifdef HAVE_LIBSSH2_AGENT_API
+ if(sshc->ssh_agent) {
+ rc = libssh2_agent_disconnect(sshc->ssh_agent);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to disconnect from libssh2 agent\n");
+ }
+ libssh2_agent_free (sshc->ssh_agent);
+ sshc->ssh_agent = NULL;
+
+ /* NB: there is no need to free identities, they are part of internal
+ agent stuff */
+ sshc->sshagent_identity = NULL;
+ sshc->sshagent_prev_identity = NULL;
+ }
+#endif
+
+ if(sshc->ssh_session) {
+ rc = libssh2_session_free(sshc->ssh_session);
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ break;
+ }
+ else if(rc < 0) {
+ infof(data, "Failed to free libssh2 session\n");
+ }
+ sshc->ssh_session = NULL;
+ }
+
+ /* worst-case scenario cleanup */
+
+ DEBUGASSERT(sshc->ssh_session == NULL);
+ DEBUGASSERT(sshc->ssh_channel == NULL);
+ DEBUGASSERT(sshc->sftp_session == NULL);
+ DEBUGASSERT(sshc->sftp_handle == NULL);
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+ DEBUGASSERT(sshc->kh == NULL);
+#endif
+#ifdef HAVE_LIBSSH2_AGENT_API
+ DEBUGASSERT(sshc->ssh_agent == NULL);
+#endif
+
+ Curl_safefree(sshc->rsa_pub);
+ Curl_safefree(sshc->rsa);
+
+ Curl_safefree(sshc->quote_path1);
+ Curl_safefree(sshc->quote_path2);
+
+ Curl_safefree(sshc->homedir);
+
+ Curl_safefree(sshc->readdir_filename);
+ Curl_safefree(sshc->readdir_longentry);
+ Curl_safefree(sshc->readdir_line);
+ Curl_safefree(sshc->readdir_linkPath);
+
+ /* the code we are about to return */
+ result = sshc->actualcode;
+
+ memset(sshc, 0, sizeof(struct ssh_conn));
+
+ conn->bits.close = TRUE;
+ sshc->state = SSH_SESSION_FREE; /* current */
+ sshc->nextstate = SSH_NO_STATE;
+ state(conn, SSH_STOP);
+ break;
+
+ case SSH_QUIT:
+ /* fallthrough, just stop! */
+ default:
+ /* internal error */
+ sshc->nextstate = SSH_NO_STATE;
+ state(conn, SSH_STOP);
+ break;
+ }
+
+ } while(!rc && (sshc->state != SSH_STOP));
+
+ if(rc == LIBSSH2_ERROR_EAGAIN) {
+ /* we would block, we need to wait for the socket to be ready (in the
+ right direction too)! */
+ *block = TRUE;
+ }
+
+ return result;
+}
+
+/* called by the multi interface to figure out what socket(s) to wait for and
+ for what actions in the DO_DONE, PERFORM and WAITPERFORM states */
+static int ssh_perform_getsock(const struct connectdata *conn,
+ curl_socket_t *sock, /* points to numsocks
+ number of sockets */
+ int numsocks)
+{
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+ int bitmap = GETSOCK_BLANK;
+ (void)numsocks;
+
+ sock[0] = conn->sock[FIRSTSOCKET];
+
+ if(conn->waitfor & KEEP_RECV)
+ bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
+
+ if(conn->waitfor & KEEP_SEND)
+ bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
+
+ return bitmap;
+#else
+ /* if we don't know the direction we can use the generic *_getsock()
+ function even for the protocol_connect and doing states */
+ return Curl_single_getsock(conn, sock, numsocks);
+#endif
+}
+
+/* Generic function called by the multi interface to figure out what socket(s)
+ to wait for and for what actions during the DOING and PROTOCONNECT states*/
+static int ssh_getsock(struct connectdata *conn,
+ curl_socket_t *sock, /* points to numsocks number
+ of sockets */
+ int numsocks)
+{
+#ifndef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+ (void)conn;
+ (void)sock;
+ (void)numsocks;
+ /* if we don't know any direction we can just play along as we used to and
+ not provide any sensible info */
+ return GETSOCK_BLANK;
+#else
+ /* if we know the direction we can use the generic *_getsock() function even
+ for the protocol_connect and doing states */
+ return ssh_perform_getsock(conn, sock, numsocks);
+#endif
+}
+
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+/*
+ * When one of the libssh2 functions has returned LIBSSH2_ERROR_EAGAIN this
+ * function is used to figure out in what direction and stores this info so
+ * that the multi interface can take advantage of it. Make sure to call this
+ * function in all cases so that when it _doesn't_ return EAGAIN we can
+ * restore the default wait bits.
+ */
+static void ssh_block2waitfor(struct connectdata *conn, bool block)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ int dir;
+ if(block && (dir = libssh2_session_block_directions(sshc->ssh_session))) {
+ /* translate the libssh2 define bits into our own bit defines */
+ conn->waitfor = ((dir&LIBSSH2_SESSION_BLOCK_INBOUND)?KEEP_RECV:0) |
+ ((dir&LIBSSH2_SESSION_BLOCK_OUTBOUND)?KEEP_SEND:0);
+ }
+ else
+ /* It didn't block or libssh2 didn't reveal in which direction, put back
+ the original set */
+ conn->waitfor = sshc->orig_waitfor;
+}
+#else
+ /* no libssh2 directional support so we simply don't know */
+#define ssh_block2waitfor(x,y) Curl_nop_stmt
+#endif
+
+/* called repeatedly until done from multi.c */
+static CURLcode ssh_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 */
+
+ result = ssh_statemach_act(conn, &block);
+ *done = (sshc->state == SSH_STOP) ? TRUE : FALSE;
+ ssh_block2waitfor(conn, block);
+
+ return result;
+}
+
+static CURLcode ssh_block_statemach(struct connectdata *conn,
+ bool duringconnect)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+ CURLcode result = CURLE_OK;
+ struct SessionHandle *data = conn->data;
+
+ while((sshc->state != SSH_STOP) && !result) {
+ bool block;
+ long left;
+
+ result = ssh_statemach_act(conn, &block);
+ if(result)
+ break;
+
+ if(Curl_pgrsUpdate(conn))
+ return CURLE_ABORTED_BY_CALLBACK;
+ else {
+ struct timeval now = Curl_tvnow();
+ result = Curl_speedcheck(data, now);
+ if(result)
+ break;
+ }
+
+ left = Curl_timeleft(data, NULL, duringconnect);
+ if(left < 0) {
+ failf(data, "Operation timed out");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+
+#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
+ if((CURLE_OK == result) && block) {
+ int dir = libssh2_session_block_directions(sshc->ssh_session);
+ curl_socket_t sock = conn->sock[FIRSTSOCKET];
+ curl_socket_t fd_read = CURL_SOCKET_BAD;
+ curl_socket_t fd_write = CURL_SOCKET_BAD;
+ if(LIBSSH2_SESSION_BLOCK_INBOUND & dir)
+ fd_read = sock;
+ if(LIBSSH2_SESSION_BLOCK_OUTBOUND & dir)
+ fd_write = sock;
+ /* wait for the socket to become ready */
+ Curl_socket_ready(fd_read, fd_write,
+ left>1000?1000:left); /* ignore result */
+ }
+#endif
+
+ }
+
+ return result;
+}
+
+/*
+ * SSH setup and connection
+ */
+static CURLcode ssh_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 scp_recv, sftp_recv;
+static Curl_send scp_send, sftp_send;
+
+/*
+ * Curl_ssh_connect() gets called from Curl_protocol_connect() to allow us to
+ * do protocol-specific actions at connect-time.
+ */
+static CURLcode ssh_connect(struct connectdata *conn, bool *done)
+{
+#ifdef CURL_LIBSSH2_DEBUG
+ curl_socket_t sock;
+#endif
+ struct ssh_conn *ssh;
+ CURLcode result;
+ struct SessionHandle *data = conn->data;
+
+ /* 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. */
+ conn->bits.close = FALSE;
+
+ if(conn->handler->protocol & CURLPROTO_SCP) {
+ conn->recv[FIRSTSOCKET] = scp_recv;
+ conn->send[FIRSTSOCKET] = scp_send;
+ }
+ else {
+ conn->recv[FIRSTSOCKET] = sftp_recv;
+ conn->send[FIRSTSOCKET] = sftp_send;
+ }
+ ssh = &conn->proto.sshc;
+
+#ifdef CURL_LIBSSH2_DEBUG
+ if(conn->user) {
+ infof(data, "User: %s\n", conn->user);
+ }
+ if(conn->passwd) {
+ infof(data, "Password: %s\n", conn->passwd);
+ }
+ sock = conn->sock[FIRSTSOCKET];
+#endif /* CURL_LIBSSH2_DEBUG */
+
+ ssh->ssh_session = libssh2_session_init_ex(my_libssh2_malloc,
+ my_libssh2_free,
+ my_libssh2_realloc, conn);
+ if(ssh->ssh_session == NULL) {
+ failf(data, "Failure initialising ssh session");
+ return CURLE_FAILED_INIT;
+ }
+
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+ if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
+ int rc;
+ ssh->kh = libssh2_knownhost_init(ssh->ssh_session);
+ if(!ssh->kh) {
+ /* eeek. TODO: free the ssh_session! */
+ return CURLE_FAILED_INIT;
+ }
+
+ /* read all known hosts from there */
+ rc = libssh2_knownhost_readfile(ssh->kh,
+ data->set.str[STRING_SSH_KNOWNHOSTS],
+ LIBSSH2_KNOWNHOST_FILE_OPENSSH);
+ if(rc < 0)
+ infof(data, "Failed to read known hosts from %s\n",
+ data->set.str[STRING_SSH_KNOWNHOSTS]);
+ }
+#endif /* HAVE_LIBSSH2_KNOWNHOST_API */
+
+#ifdef CURL_LIBSSH2_DEBUG
+ libssh2_trace(ssh->ssh_session, ~0);
+ infof(data, "SSH socket: %d\n", (int)sock);
+#endif /* CURL_LIBSSH2_DEBUG */
+
+ state(conn, SSH_INIT);
+
+ result = ssh_multi_statemach(conn, done);
+
+ return result;
+}
+
+/*
+ ***********************************************************************
+ *
+ * scp_perform()
+ *
+ * This is the actual DO function for SCP. Get a file according to
+ * the options previously setup.
+ */
+
+static
+CURLcode scp_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_SCP_TRANS_INIT);
+
+ /* run the state-machine */
+ result = ssh_multi_statemach(conn, dophase_done);
+
+ *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+
+ return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode scp_doing(struct connectdata *conn,
+ bool *dophase_done)
+{
+ CURLcode result;
+ result = ssh_multi_statemach(conn, dophase_done);
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+ return result;
+}
+
+/*
+ * The DO function is generic for both protocols. There was previously two
+ * separate ones but this way means less duplicated code.
+ */
+
+static CURLcode ssh_do(struct connectdata *conn, bool *done)
+{
+ CURLcode res;
+ bool connected = 0;
+ struct SessionHandle *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, 0);
+ Curl_pgrsSetDownloadSize(data, 0);
+
+ if(conn->handler->protocol & CURLPROTO_SCP)
+ res = scp_perform(conn, &connected, done);
+ else
+ res = sftp_perform(conn, &connected, done);
+
+ return res;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+ this is still blocking is that the multi interface code has no support for
+ disconnecting operations that takes a while */
+static CURLcode scp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+ CURLcode result = CURLE_OK;
+ struct ssh_conn *ssh = &conn->proto.sshc;
+ (void) dead_connection;
+
+ Curl_safefree(conn->data->req.protop);
+
+ if(ssh->ssh_session) {
+ /* only if there's a session still around to use! */
+
+ state(conn, SSH_SESSION_DISCONNECT);
+
+ result = ssh_block_statemach(conn, FALSE);
+ }
+
+ return result;
+}
+
+/* generic done function for both SCP and SFTP called from their specific
+ done functions */
+static CURLcode ssh_done(struct connectdata *conn, CURLcode status)
+{
+ CURLcode result = CURLE_OK;
+ struct SSHPROTO *sftp_scp = conn->data->req.protop;
+
+ if(status == CURLE_OK) {
+ /* run the state-machine
+
+ TODO: when the multi interface is used, this _really_ should be using
+ the ssh_multi_statemach function but we have no general support for
+ non-blocking DONE operations, not in the multi state machine and with
+ Curl_done() invokes on several places in the code!
+ */
+ result = ssh_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;
+}
+
+
+static CURLcode scp_done(struct connectdata *conn, CURLcode status,
+ bool premature)
+{
+ (void)premature; /* not used */
+
+ if(status == CURLE_OK)
+ state(conn, SSH_SCP_DONE);
+
+ return ssh_done(conn, status);
+
+}
+
+/* return number of received (decrypted) bytes */
+static ssize_t scp_send(struct connectdata *conn, int sockindex,
+ const void *mem, size_t len, CURLcode *err)
+{
+ ssize_t nwrite;
+ (void)sockindex; /* we only support SCP on the fixed known primary socket */
+
+ /* libssh2_channel_write() returns int! */
+ nwrite = (ssize_t)
+ libssh2_channel_write(conn->proto.sshc.ssh_channel, mem, len);
+
+ ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+ if(nwrite == LIBSSH2_ERROR_EAGAIN) {
+ *err = CURLE_AGAIN;
+ nwrite = 0;
+ }
+ else if(nwrite < LIBSSH2_ERROR_NONE) {
+ *err = libssh2_session_error_to_CURLE((int)nwrite);
+ nwrite = -1;
+ }
+
+ return nwrite;
+}
+
+/*
+ * If the read would block (EWOULDBLOCK) we return -1. Otherwise we return
+ * a regular CURLcode value.
+ */
+static ssize_t scp_recv(struct connectdata *conn, int sockindex,
+ char *mem, size_t len, CURLcode *err)
+{
+ ssize_t nread;
+ (void)sockindex; /* we only support SCP on the fixed known primary socket */
+
+ /* libssh2_channel_read() returns int */
+ nread = (ssize_t)
+ libssh2_channel_read(conn->proto.sshc.ssh_channel, mem, len);
+
+ ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+ if(nread == LIBSSH2_ERROR_EAGAIN) {
+ *err = CURLE_AGAIN;
+ nread = -1;
+ }
+
+ return nread;
+}
+
+/*
+ * =============== SFTP ===============
+ */
+
+/*
+ ***********************************************************************
+ *
+ * sftp_perform()
+ *
+ * This is the actual DO function for SFTP. Get a file/directory according to
+ * the options previously setup.
+ */
+
+static
+CURLcode sftp_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 = ssh_multi_statemach(conn, dophase_done);
+
+ *connected = conn->bits.tcpconnect[FIRSTSOCKET];
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+
+ return result;
+}
+
+/* called from multi.c while DOing */
+static CURLcode sftp_doing(struct connectdata *conn,
+ bool *dophase_done)
+{
+ CURLcode result;
+ result = ssh_multi_statemach(conn, dophase_done);
+
+ if(*dophase_done) {
+ DEBUGF(infof(conn->data, "DO phase is complete\n"));
+ }
+ return result;
+}
+
+/* BLOCKING, but the function is using the state machine so the only reason
+ this is still blocking is that the multi interface code has no support for
+ disconnecting operations that takes a while */
+static CURLcode sftp_disconnect(struct connectdata *conn, bool dead_connection)
+{
+ CURLcode result = CURLE_OK;
+ (void) dead_connection;
+
+ DEBUGF(infof(conn->data, "SSH DISCONNECT starts now\n"));
+
+ Curl_safefree(conn->data->req.protop);
+
+ if(conn->proto.sshc.ssh_session) {
+ /* only if there's a session still around to use! */
+ state(conn, SSH_SFTP_SHUTDOWN);
+ result = ssh_block_statemach(conn, FALSE);
+ }
+
+ DEBUGF(infof(conn->data, "SSH DISCONNECT is done\n"));
+
+ return result;
+
+}
+
+static CURLcode sftp_done(struct connectdata *conn, CURLcode status,
+ bool premature)
+{
+ struct ssh_conn *sshc = &conn->proto.sshc;
+
+ if(status == CURLE_OK) {
+ /* Post quote commands are executed after the SFTP_CLOSE state to avoid
+ errors that could happen due to open file handles during POSTQUOTE
+ operation */
+ if(!status && !premature && conn->data->set.postquote) {
+ sshc->nextstate = SSH_SFTP_POSTQUOTE_INIT;
+ state(conn, SSH_SFTP_CLOSE);
+ }
+ else
+ state(conn, SSH_SFTP_CLOSE);
+ }
+ return ssh_done(conn, status);
+}
+
+/* return number of sent bytes */
+static ssize_t sftp_send(struct connectdata *conn, int sockindex,
+ const void *mem, size_t len, CURLcode *err)
+{
+ ssize_t nwrite; /* libssh2_sftp_write() used to return size_t in 0.14
+ but is changed to ssize_t in 0.15. These days we don't
+ support libssh2 0.15*/
+ (void)sockindex;
+
+ nwrite = libssh2_sftp_write(conn->proto.sshc.sftp_handle, mem, len);
+
+ ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+ if(nwrite == LIBSSH2_ERROR_EAGAIN) {
+ *err = CURLE_AGAIN;
+ nwrite = 0;
+ }
+ else if(nwrite < LIBSSH2_ERROR_NONE) {
+ *err = libssh2_session_error_to_CURLE((int)nwrite);
+ nwrite = -1;
+ }
+
+ return nwrite;
+}
+
+/*
+ * Return number of received (decrypted) bytes
+ */
+static ssize_t sftp_recv(struct connectdata *conn, int sockindex,
+ char *mem, size_t len, CURLcode *err)
+{
+ ssize_t nread;
+ (void)sockindex;
+
+ nread = libssh2_sftp_read(conn->proto.sshc.sftp_handle, mem, len);
+
+ ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+
+ if(nread == LIBSSH2_ERROR_EAGAIN) {
+ *err = CURLE_AGAIN;
+ nread = -1;
+ }
+ return nread;
+}
+
+/* The get_pathname() function is being borrowed from OpenSSH sftp.c
+ version 4.6p1. */
+/*
+ * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+static CURLcode
+get_pathname(const char **cpp, char **path)
+{
+ const char *cp = *cpp, *end;
+ char quot;
+ unsigned int i, j;
+ static const char WHITESPACE[] = " \t\r\n";
+
+ cp += strspn(cp, WHITESPACE);
+ if(!*cp) {
+ *cpp = cp;
+ *path = NULL;
+ return CURLE_QUOTE_ERROR;
+ }
+
+ *path = malloc(strlen(cp) + 1);
+ if(*path == NULL)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Check for quoted filenames */
+ if(*cp == '\"' || *cp == '\'') {
+ quot = *cp++;
+
+ /* Search for terminating quote, unescape some chars */
+ for(i = j = 0; i <= strlen(cp); i++) {
+ if(cp[i] == quot) { /* Found quote */
+ i++;
+ (*path)[j] = '\0';
+ break;
+ }
+ if(cp[i] == '\0') { /* End of string */
+ /*error("Unterminated quote");*/
+ goto fail;
+ }
+ if(cp[i] == '\\') { /* Escaped characters */
+ i++;
+ if(cp[i] != '\'' && cp[i] != '\"' &&
+ cp[i] != '\\') {
+ /*error("Bad escaped character '\\%c'",
+ cp[i]);*/
+ goto fail;
+ }
+ }
+ (*path)[j++] = cp[i];
+ }
+
+ if(j == 0) {
+ /*error("Empty quotes");*/
+ goto fail;
+ }
+ *cpp = cp + i + strspn(cp + i, WHITESPACE);
+ }
+ else {
+ /* Read to end of filename */
+ end = strpbrk(cp, WHITESPACE);
+ if(end == NULL)
+ end = strchr(cp, '\0');
+ *cpp = end + strspn(end, WHITESPACE);
+
+ memcpy(*path, cp, end - cp);
+ (*path)[end - cp] = '\0';
+ }
+ return CURLE_OK;
+
+ fail:
+ Curl_safefree(*path);
+ return CURLE_QUOTE_ERROR;
+}
+
+
+static const char *sftp_libssh2_strerror(int err)
+{
+ switch (err) {
+ case LIBSSH2_FX_NO_SUCH_FILE:
+ return "No such file or directory";
+
+ case LIBSSH2_FX_PERMISSION_DENIED:
+ return "Permission denied";
+
+ case LIBSSH2_FX_FAILURE:
+ return "Operation failed";
+
+ case LIBSSH2_FX_BAD_MESSAGE:
+ return "Bad message from SFTP server";
+
+ case LIBSSH2_FX_NO_CONNECTION:
+ return "Not connected to SFTP server";
+
+ case LIBSSH2_FX_CONNECTION_LOST:
+ return "Connection to SFTP server lost";
+
+ case LIBSSH2_FX_OP_UNSUPPORTED:
+ return "Operation not supported by SFTP server";
+
+ case LIBSSH2_FX_INVALID_HANDLE:
+ return "Invalid handle";
+
+ case LIBSSH2_FX_NO_SUCH_PATH:
+ return "No such file or directory";
+
+ case LIBSSH2_FX_FILE_ALREADY_EXISTS:
+ return "File already exists";
+
+ case LIBSSH2_FX_WRITE_PROTECT:
+ return "File is write protected";
+
+ case LIBSSH2_FX_NO_MEDIA:
+ return "No media";
+
+ case LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM:
+ return "Disk full";
+
+ case LIBSSH2_FX_QUOTA_EXCEEDED:
+ return "User quota exceeded";
+
+ case LIBSSH2_FX_UNKNOWN_PRINCIPLE:
+ return "Unknown principle";
+
+ case LIBSSH2_FX_LOCK_CONFlICT:
+ return "File lock conflict";
+
+ case LIBSSH2_FX_DIR_NOT_EMPTY:
+ return "Directory not empty";
+
+ case LIBSSH2_FX_NOT_A_DIRECTORY:
+ return "Not a directory";
+
+ case LIBSSH2_FX_INVALID_FILENAME:
+ return "Invalid filename";
+
+ case LIBSSH2_FX_LINK_LOOP:
+ return "Link points to itself";
+ }
+ return "Unknown error in libssh2";
+}
+
+#endif /* USE_LIBSSH2 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 20:51:26 +0000