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Posted to dev@ant.apache.org by bu...@apache.org on 2006/04/21 03:27:58 UTC
DO NOT REPLY [Bug 39373] New: - scp task does not work for some sshd, which does not scp1 protocol.
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Summary: scp task does not work for some sshd, which does not
scp1 protocol.
Product: Ant
Version: 1.6.5
Platform: All
OS/Version: other
Status: NEW
Severity: normal
Priority: P2
Component: Optional Tasks
AssignedTo: dev@ant.apache.org
ReportedBy: ymnk@jcraft.com
In the current implementaion, scp task included in Apache Ant has been using scp1
protocol to transfer files, but some proprietary sshd[1] has not supported it anymore.
To resolve this problem, scp task should use sftp protocol[2], which must be supported by
almost of all ssh2 sshd.
[1] http://www.snailbook.com/faq/scp-ossh-to-ssh2.auto.html
[2] http://www.unix.org.ua/orelly/networking_2ndEd/ssh/ch03_08.htm
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From ymnk@jcraft.com 2006-04-24 05:43 -------
(In reply to comment #7)
> The version of F-Secure sshd we are using supports only ssh2 protocol.
It is interesting.
May I ask you to show me the fist line of outputs from
$ telnet address_of_sshd 22
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-04-26 16:29 -------
Why the change in direction? I like the idea of adding the sftp attribute to
the scp task, rather than creating a new sftp task. Perhaps both are a good
idea.
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-05-02 23:13 -------
After working out an issue with Jsch, I have successfully tested the
enhancements to the scp task.
I think the sftp task enhancement should be in a seperate bug report, because I
believe it is a different subject. Furthermore, I feel that this enhancement to
the scp task is a higher priority than the need for a new sftp task.
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-04-21 21:28 -------
-1 on Ben's comment.
Please read the links provided by Atsuhiko, particularly
[2] http://www.unix.org.ua/orelly/networking_2ndEd/ssh/ch03_08.htm.
SFTP is the protocol used by the program scp2. It is entirely appropriate to
add this feature to the scp task.
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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ymnk@jcraft.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #18147|0 |1
is obsolete| |
------- Additional Comments From ymnk@jcraft.com 2006-04-26 15:16 -------
Created an attachment (id=18186)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=18186&action=view)
an implementation of sftp task
The attached patch is a quick hack to implement sftp task, which
is based on ftp task and using jsch for sftp functionality.
It accepts attributes for ftp and scp tasks except for 'binary',
'passive', 'separator' and 'umask'.
It seems following tasks are working on my testing, however, frankly to say,
I'm not familiar with ftp task and have never used and run it, so I may
mis-understand its operational semantics. Comments, suggestions and feedbacks
are welcome.
PS 1. that patch is for ant_20060426105634.tar.gz
PS 2. jsch-0.1.27 is required.
<sftp action="send"
server="${server}"
userid="${userid}"
password="${password}"
remotedir="incoming"
depends="yes">
<fileset dir="htdocs/manual"/>
</sftp>
<sftp action="get"
server="${server}"
userid="${userid}"
password="${password}">
<fileset dir="htdocs/manual" >
<include name="**/*.html"/>
</fileset>
</sftp>
<sftp action="del"
server="${server}"
userid="${userid}"
password="${password}" >
<fileset>
<include name="**/*.tmp"/>
</fileset>
</sftp>
<sftp action="list"
server="${server}"
userid="${userid}"
password="${password}"
listing="data/sftp.listing" >
<fileset>
<include name="**"/>
</fileset>
</sftp>
<sftp action="mkdir"
server="${server}"
userid="${userid}"
password="${password}"
remotedir="test" />
<sftp action="chmod"
server="${server}"
userid="${userid}"
password="${password}"
chmod="0700" >
<fileset>
<include name="*.log"/>
</fileset>
</sftp>
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-05-09 17:12 -------
Created an attachment (id=18251)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=18251&action=view)
Patch to scp.html manual page
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From BBurgess@tiaa-cref.org 2006-04-21 18:17 -------
Wouldn't it be better to define a new task called "sftp" rather than changing
the "scp" task to no longer use scp?
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------- Additional Comments From ymnk@jcraft.com 2006-05-10 03:48 -------
(In reply to comment #19)
> We also need an update of scp's manual page. IIUC we should recommend to set
> the sftp attribute to true if the ssh server supports ssh2, correct?
IMHO, if users have satisfied with original scp task, there are not any merit
to use sftp attribute, becase scp1 protocol is more efficent than sftp protocol.
So, I hesitate to recommend to use it explicitly. That attribute is only for
some users, whose sshd does not support scp1 anymore. Almost users will use
OpenSSH's sshd and it will continue to support scp1 for a while.
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------- Additional Comments From ymnk@jcraft.com 2006-04-24 03:29 -------
(In reply to comment #5)
> After applying the patch and running a basic test against an F-Secure sshd I
> get the following error:
> BUILD FAILED
> H:\build.xml:6: com.jcraft.jsch.JSchException: invalid server's version
string
> I am using the jsch 0.1.27
Does that sshd support ssh2 protocol?
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Re: DO NOT REPLY [Bug 39373] - scp task does not work for some sshd,
which does not scp1 protocol.
Posted by Antoine Levy-Lambert <an...@gmx.de>.
Hello Atsuhiko,
I think that no ant committer has looked at your patch yet, but do not
lose hope, I am pretty sure that someone will have a look at that,
everyone is using the sshexec and scp tasks, so we are intereted by
enhancements.
Regards,
Antoine
bugzilla@apache.org wrote:
> http://issues.apache.org/bugzilla/show_bug.cgi?id=39373
>
>
>
> I agree with him. There should be a separate bug report for sftp task, but
> that patch for sftp task is based on the source code for this modified scp task.
>
> Dear ant developers, are there not any possibilties that this modification for scp task will be adopted?
> If so, I'll delete it from the source code and submit a new bug entry for sftp task
> and post a patch, which does not include the modifications for scp.
> I don't want to keep several source code trees.
>
>
>
>
>
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------- Additional Comments From ymnk@jcraft.com 2006-05-08 03:26 -------
(In reply to comment #16)
> I think the sftp task enhancement should be in a seperate bug report, because I
> believe it is a different subject. Furthermore, I feel that this enhancement to
> the scp task is a higher priority than the need for a new sftp task.
I agree with him. There should be a separate bug report for sftp task, but
that patch for sftp task is based on the source code for this modified scp task.
Dear ant developers, are there not any possibilties that this modification for scp task will be adopted?
If so, I'll delete it from the source code and submit a new bug entry for sftp task
and post a patch, which does not include the modifications for scp.
I don't want to keep several source code trees.
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From ymnk@jcraft.com 2006-04-28 06:40 -------
(In reply to comment #14)
> Why the change in direction? I like the idea of adding the sftp attribute to
> the scp task, rather than creating a new sftp task. Perhaps both are a good
> idea.
Of course, that patch includes both.
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------- Additional Comments From carej@us.ibm.com 2006-04-21 21:05 -------
+1 on Ben's comment
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------- Additional Comments From ymnk@jcraft.com 2006-09-27 09:35 -------
Created an attachment (id=18921)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=18921&action=view)
bugfix to download files/directory, which are pointed by symbolic link.
I have found a bug in downloading files and directories, which are pointed by
symbolic links,
with scp task using sftp of ant 1.7.0beta2.
I will attache a patch to fix this problem.
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------- Additional Comments From ymnk@jcraft.com 2006-04-25 00:09 -------
(In reply to comment #10)
> (In reply to comment #9)
> > SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
>
> It appears that the ascii codes for the server version string returned by F-
> Secure is lower case. The following patch to Session.java will address the
> issue.
It is curious. You had written as in comment #9
SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
, which starts with upper case string "SSH-" and the RFC4253[1] says at Section 4.2 as follows,
4.2. Protocol Version Exchange
When the connection has been established, both sides MUST send an
identification string. This identification string MUST be
SSH-protoversion-softwareversion SP comments CR LF
Since the protocol being defined in this set of documents is version
2.0, the 'protoversion' MUST be "2.0". The 'comments' string is
OPTIONAL. If the 'comments' string is included, a 'space' character
(denoted above as SP, ASCII 32) MUST separate the 'softwareversion'
and 'comments' strings.
I don't have the reason why it starts with 'ssh-'.
> The task is still not working however. Now I get the following error...
> com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: invalid data
> This exception is thrown during the Session.read(buf) method.
If it really sents 'ssh-', it may not use formal ssh2 protocol, IMHO.
Anyway, that problem is not related to this topic.
[1] http://www.ietf.org/rfc/rfc4253.txt
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bodewig@apache.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
------- Additional Comments From bodewig@apache.org 2006-07-27 04:37 -------
See bug 39532 for a new sftp task patch, closing this one.
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------- Additional Comments From bodewig@apache.org 2006-05-11 04:02 -------
(In reply to comment #20)
> Patch to scp.html manual page
I've applied a slightly modified version (recommending the option if the server
doesn't support SSH1 based on Atsuhiko Yamanaka's comment) but svn is down right
now so I can't commit it.
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------- Additional Comments From riznob@hotmail.com 2006-04-25 00:36 -------
(In reply to comment #11)
> (In reply to comment #10)
> > (In reply to comment #9)
> > > SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
> >
> > It appears that the ascii codes for the server version string returned by F-
> > Secure is lower case. The following patch to Session.java will address the
> > issue.
> It is curious. You had written as in comment #9
> SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
> , which starts with upper case string "SSH-" and the RFC4253[1] says at
Section 4.2 as follows,
> 4.2. Protocol Version Exchange
>
> When the connection has been established, both sides MUST send an
> identification string. This identification string MUST be
> SSH-protoversion-softwareversion SP comments CR LF
> Since the protocol being defined in this set of documents is version
> 2.0, the 'protoversion' MUST be "2.0". The 'comments' string is
> OPTIONAL. If the 'comments' string is included, a 'space' character
> (denoted above as SP, ASCII 32) MUST separate the 'softwareversion'
> and 'comments' strings.
> I don't have the reason why it starts with 'ssh-'.
> > The task is still not working however. Now I get the following error...
> > com.jcraft.jsch.JSchException: Session.connect: java.io.IOException:
invalid data
> > This exception is thrown during the Session.read(buf) method.
> If it really sents 'ssh-', it may not use formal ssh2 protocol, IMHO.
> Anyway, that problem is not related to this topic.
> [1] http://www.ietf.org/rfc/rfc4253.txt
I agree that this is a seperate issue. I would like to work with you to resolve
it, if possible. I am interested in the enhancements to the scp task and would
like to see them committed to the Ant project. Should we take this discussion
to the ant-dev list?
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DO NOT REPLY [Bug 39373] - scp task does not work for some sshd, which does not scp1 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-04-24 16:45 -------
(In reply to comment #8)
> (In reply to comment #7)
> > The version of F-Secure sshd we are using supports only ssh2 protocol.
> It is interesting.
> May I ask you to show me the fist line of outputs from
> $ telnet address_of_sshd 22
SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
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------- Additional Comments From jkf@apache.org 2006-06-07 19:19 -------
Stefan, have you upped the manual change?
Can this one be closed?
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------- Additional Comments From riznob@hotmail.com 2006-04-24 05:23 -------
(In reply to comment #6)
> (In reply to comment #5)
> > After applying the patch and running a basic test against an F-Secure sshd
I
> > get the following error:
> > BUILD FAILED
> > H:\build.xml:6: com.jcraft.jsch.JSchException: invalid server's version
> string
> > I am using the jsch 0.1.27
> Does that sshd support ssh2 protocol?
The version of F-Secure sshd we are using supports only ssh2 protocol.
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------- Additional Comments From riznob@hotmail.com 2006-04-24 22:55 -------
(In reply to comment #9)
> (In reply to comment #8)
> > (In reply to comment #7)
> > > The version of F-Secure sshd we are using supports only ssh2 protocol.
> > It is interesting.
> > May I ask you to show me the fist line of outputs from
> > $ telnet address_of_sshd 22
> SSH-2.0-3.2.9 F-SECURE SSH 3.2.3
It appears that the ascii codes for the server version string returned by F-
Secure is lower case. The following patch to Session.java will address the
issue.
--- Session.java.orig 2006-04-18 22:37:02.000000000 -0700
+++ Session.java 2006-04-24 15:42:58.594132100 -0700
@@ -224,11 +224,13 @@
}
}
- if(i==buf.buffer.length ||
+ if((i==buf.buffer.length ||
(i>4 && (buf.buffer[0]!='S'||buf.buffer[1]!='S'||
buf.buffer[2]!='H'||buf.buffer[3]!='-'))||
i<7 || // SSH-1.99 or SSH-2.0
- (buf.buffer[4]=='1' && buf.buffer[6]!='9') // SSH-1.5
+ (buf.buffer[4]=='1' && buf.buffer[6]!='9')) ^ // SSH-1.5
+ (buf.buffer[0]!='s'||buf.buffer[1]!='s'||
+ buf.buffer[2]!='h'||buf.buffer[3]!='-') // "ssh-" F-Secure returns
lowercase
){
throw new JSchException("invalid server's version string");
}
The task is still not working however. Now I get the following error...
com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: invalid
data
This exception is thrown during the Session.read(buf) method.
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------- Additional Comments From atsuhiko.yamanaka@gmail.com 2006-05-03 00:21 -------
(In reply to comment #5)
> After applying the patch and running a basic test against an F-Secure sshd I
> get the following error:
> BUILD FAILED
> H:\build.xml:6: com.jcraft.jsch.JSchException: invalid server's version
string
> I am using the jsch 0.1.27
Thanks to Robert, I found the problem in the jsch code and has fixed it, at
last.
If somebody has simillar problem, http://www.jcraft.com/jsch/jsch-0.1.28-
rc4.jar will resolve that problem.
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------- Additional Comments From ymnk@jcraft.com 2006-04-21 01:37 -------
Created an attachment (id=18147)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=18147&action=view)
a patch to use sftp protocol in scp task.
Attached patch will allow scp task to use sftp protocol instead of scp1
protocol.
If you add the attribute 'sftp="true"', sftp protocol will be used and
if 'sftp="false"', scp1 protocol will be used.
By the default, the attribute 'sftp' is "false" for backword compatibity.
To try this patch, jsch-0.1.27[1] is required.
[1] http://sourceforge.net/project/showfiles.php?group_id=64920
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------- Additional Comments From ymnk@jcraft.com 2006-05-11 06:56 -------
(In reply to comment #22)
> I've applied a slightly modified version (recommending the option if the server
> doesn't support SSH1 based on Atsuhiko Yamanaka's comment) but svn is down right
> now so I can't commit it.
I have meant scp1 protocol, not ssh1 protocol. Sorry for lack of words.
scp1 protocol is just a file transfer protocol and it has been used on ssh1 and ssh2 protocol.
For example, openssh'd sshd can disable ssh1 protocol support by configuring /etc/ssh/sshd_conifg,
but scp1 procol can be available if there exists '/usr/bin/scp' command.
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------- Additional Comments From riznob@hotmail.com 2006-04-22 00:35 -------
After applying the patch and running a basic test against an F-Secure sshd I
get the following error:
BUILD FAILED
H:\build.xml:6: com.jcraft.jsch.JSchException: invalid server's version string
I am using the jsch 0.1.27
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------- Additional Comments From bodewig@apache.org 2006-05-09 04:25 -------
I've committed the part of the patch that adds sftp support to scp, the sftp
task will remain separate since it needs a bit more of review than I can do
right now.
You'll note that there are a few differences between your patch and what I
committed, most of them are whitespace only.
We also need an update of scp's manual page. IIUC we should recommend to set
the sftp attribute to true if the ssh server supports ssh2, correct?
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