Difference between revisions of "SSH Settings"

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An SSH connection to an OpenVMS machine is required for syncing source code files, building, running and debugging projects. Depending on the type of configuration, SSH connection settings can be edited either in the ''vmssoftware.ssh-helper-settings.json'' file located in ''/.vscode'' directory or via Visual Studio Code settings page.
+
An SSH connection to an OpenVMS machine is required for syncing source code files, building, running, and debugging projects. <br>
 +
Depending on the type of configuration, SSH connection settings can be edited either in the '''vmssoftware.ssh-helper-settings.json''' file located in ''/.vscode'' directory or via '''Visual Studio Code''' settings page.
  
 
=SSH Settings Template=
 
=SSH Settings Template=
Line 27: Line 28:
  
 
=Connection=
 
=Connection=
The connection section sets the current connection details.
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The '''connection''' section sets the current connection details.
* <code>'''Host'''</code> - IP-address or name of OpenVMS machine. It also can refer to the label of a connection specified in host-collection section - should be enclosed in angle brackets  <code>(<hostname>)</code>. In that
+
* <code>'''host'''</code> - IP-address or name of an OpenVMS machine or the label of a predefined connection from the '''host collection''' section
 
case, all other fields are ignored.  
 
case, all other fields are ignored.  
* <code>'''Port'''</code> - The port number to use for the SSH connection. Default is 22.
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* <code>'''port'''</code> - The port number to use for the SSH connection. Default is 22.
* <code>'''Username'''</code> - User account that will be used for the SSH connection.
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* <code>'''username'''</code> - User account that will be used for the SSH connection.
* <code>'''Password'''</code> - User password that will be used for the SSH connection.. If it is omitted a password input box will be shown on connection attempt.
+
* <code>'''password'''</code> - User password that will be used for the SSH connection.. If it is omitted a password input box will be shown on connection attempt.
* <code>'''Key File'''</code> - Path to SSH private key file. How to configure connection using SSH key see [https://raymii.org/s/blog/SSH_public_key_authentication_on_OpenVMS.html SSH public key authentication on OpenVMS]
+
* <code>'''keyFile'''</code> - Path to SSH private key file. For details on how to configure connection using SSH key, see [https://raymii.org/s/blog/SSH_public_key_authentication_on_OpenVMS.html SSH public key authentication on OpenVMS]
 
* <code>'''skipSignatureVerification'''</code> - Skip signature verification. Set it to 'true' if an error 'Handshake failed: signature verification failed' occurs.
 
* <code>'''skipSignatureVerification'''</code> - Skip signature verification. Set it to 'true' if an error 'Handshake failed: signature verification failed' occurs.
  
Required fields to connect:  
+
Required fields are:  
# <code>'''Host'''</code>
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* <code>'''host'''</code>
# <code>'''Username'''</code>
+
* <code>'''username'''</code>
  
To provide security user may use one of two ways:
+
You may use either password or key file to establish connection:
# <code>'''Key File'''</code>
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* <code>'''keyFile'''</code>
# <code>'''Password'''</code>
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* <code>'''password'''</code>
  
If '''Key File''' is empty, '''Password''' will be used. If '''Password''' is empty too a password input box will be shown on connection attempt.
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If '''keyFile''' is not set, '''password''' is used. If neither '''password''' nor '''keyFile''' is specified, you will be prompted to enter your password during the connection attempt.
  
 
=Host Collection=
 
=Host Collection=
If you need to connect to different servers when working on your project, it makes sense to list all the required connections and then just pick the one that you need by using its label as the '''host''' name in the '''connection''' section.
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If you need to connect to different servers when working on your project, it makes sense to create a list of required connections to be able to quickly connect to any of them.  
'''NOTE''': If you use VSC type of configuration, you will not be able to specify host collection in UI. Instead, you need to click "Edit in settings.json" and specify them in the '''settings.json''' file.  
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You can do this by adding all the required connections to the '''Host Collection''' list.
  
[[File:Ssh collection hosts.png|Ssh collection hosts.png]]
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=== Adding a new host to collection ===
 +
To add a new host to the collection:
 +
<ol>
 +
<li>Copy the ssh connection template to '''host-collection.hosts''' array:</li>
 +
<pre>"host-collection": {
 +
    "hosts": [
 +
        {
 +
            "host": "<First>",
 +
            "keyFile": "",
 +
            "password": "",
 +
            "port": 22,
 +
            "username": "",
 +
            "skipSignatureVerification": false
 +
        }
 +
    ]
 +
}</pre>
 +
<li>Specify connection parameters</li>
 +
<li>Make sure that '''label''' parameter is set.</li>
 +
</ol>
  
To add new host into collection do the following:
+
===Selecting which connection to use===
* Copy whole content of {...} from '''connection''' into '''host-collection'''->'''hosts'''
+
To use one of connections from the '''host collection''' section, copy the value of ''label'' and paste it in angle brackets ('''<label>''') to the '''host''' field in the '''connection''' section.
* Add field '''label'''
 
* Adjust fields for this new host in collection
 
* Write <''label''> into '''host''' field in '''connection''' to use this new host as default
 
  
For example:
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=== Example ===
 
<pre>
 
<pre>
 
{
 
{
 
     "connection": {
 
     "connection": {
         "host": "<First>",
+
         "host": "<MySSHConnection>",
 
         "keyFile": "",
 
         "keyFile": "",
 
         "password": "",
 
         "password": "",
Line 72: Line 88:
 
         "hosts": [
 
         "hosts": [
 
             {
 
             {
                 "host": "1.1.1.1",
+
                 "host": "10.10.6.1",
 
                 "keyFile": "",
 
                 "keyFile": "",
                 "password": "pass",
+
                 "password": "myPassword",
 
                 "port": 22,
 
                 "port": 22,
 
                 "username": "user",
 
                 "username": "user",
 
                 "skipSignatureVerification": true,
 
                 "skipSignatureVerification": true,
                 "label": "First"
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                 "label": "MySSHConnection"
 
             }
 
             }
 
         ]
 
         ]
    },
 
    "timeouts": {
 
        "cmdTimeout": 0,
 
        "feedbackTimeout": 0,
 
        "welcomeTimeout": 0
 
    },
 
    "terminal": {
 
        "command": "ssh -oHostKeyAlgorithms=+ssh-dss ${keyFile?-i ${keyFile}} ${username?${username}@}${host}"
 
 
     }
 
     }
 
}
 
}
 
</pre>
 
</pre>
 +
 +
'''NOTE''': If you use VSC type of configuration, you will not be able to specify host collection in UI. Instead, you need to click "Edit in settings.json" and specify them in the '''settings.json''' file.
 +
 +
[[File:Ssh collection hosts.png|Ssh collection hosts.png]]
  
 
=Timeouts=
 
=Timeouts=
Specifies SSH connection timesouts.
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You can define SSH connection timeouts in this section.
* <code>'''Cmd Timeout'''</code> - Timeout for command response. If a command is sent to the OpenVMS system and the OpenVMS system does not a send response for the specified period of time, it will be considered as rejected.
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* <code>'''cmdTimeout'''</code> - Timeout for command response. If a command is sent to the OpenVMS system and the OpenVMS system does not a send response for the specified period of time, it will be considered as rejected.
* <code>'''Feedback Timeout'''</code> - If the SSH connection does not send feedback for this period, the specified password will be considered as invalid.
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* <code>'''feedbackTimeout'''</code> - If the SSH connection does not send feedback for the specified interval, the password will be considered as invalid.
* <code>'''Welcome Timeout'''</code> - If the SSH shell prompt is not received within this period of time, the shell will be closed.
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* <code>'''welcomeTimeout'''</code> - If the SSH shell prompt is not received within this interval, the shell will be closed.
  
 
  '''NOTE''': Value "0" means, that timeout is not used.  
 
  '''NOTE''': Value "0" means, that timeout is not used.  
  
 
  '''WARN''': Do not change timeout settings unless necessary.
 
  '''WARN''': Do not change timeout settings unless necessary.
 +
 +
===Example===
 +
<pre>
 +
"timeouts": {
 +
    "cmdTimeout": 0,
 +
    "feedbackTimeout": 0,
 +
    "welcomeTimeout": 0
 +
}
 +
</pre>
  
 
=Terminal=
 
=Terminal=
 +
Specifies command to start the shell in the VS Code integrated terminal.
 +
* <code>'''Command'''</code> - command to start the shell.
  
Specifies command to start SSH shell in VS Code integrated terminal.
+
'''NOTE:''' It is possible to use variables in the command. The syntax is: ${variable} or ${varable?<text if variable isn't empty>}. Supported variables: '''host''', '''port''', '''username''', '''password''', and '''keyFile'''.
* <code>'''Command'''</code> - command to start SSH shell. It is possible to insert variables into command. The syntax is: ${variable} or ${varable?<text if variable isn't empty>}. Where variable can be following: '''host''', '''port''', '''username''', '''password''' and '''keyFile'''.
+
'''NOTE:''' password may come from settings or UI prompt that is shown if the password is not specified in settings. Passwords entered in the terminal are not saved.
  
'''NOTE''': password may come from settings or if user entered it in UI prompt. Passwords entered in terminal aren't saved.
+
===Example===
 +
<pre>
 +
"terminal": {
 +
    "command": "ssh -oHostKeyAlgorithms=+ssh-dss ${keyFile?-i ${keyFile}} ${username?${username}@}${host}"
 +
}
 +
</pre>
  
 
[[Category:VMS IDE]]
 
[[Category:VMS IDE]]

Revision as of 13:53, 21 August 2019

An SSH connection to an OpenVMS machine is required for syncing source code files, building, running, and debugging projects.
Depending on the type of configuration, SSH connection settings can be edited either in the vmssoftware.ssh-helper-settings.json file located in /.vscode directory or via Visual Studio Code settings page.

SSH Settings Template

{
    "connection": {
        "host": "",
        "keyFile": "",
        "password": "",
        "port": 22,
        "username": "",
        "skipSignatureVerification": false,
    },
    "host-collection": {
        "hosts": []
    },
    "timeouts": {
        "cmdTimeout": 0,
        "feedbackTimeout": 0,
        "welcomeTimeout": 0
    },
    "terminal": {
        "command": "ssh -oHostKeyAlgorithms=+ssh-dss ${keyFile?-i ${keyFile}} ${username?${username}@}${host}"
    }
}

Connection

The connection section sets the current connection details.

  • host - IP-address or name of an OpenVMS machine or the label of a predefined connection from the host collection section

case, all other fields are ignored.

  • port - The port number to use for the SSH connection. Default is 22.
  • username - User account that will be used for the SSH connection.
  • password - User password that will be used for the SSH connection.. If it is omitted a password input box will be shown on connection attempt.
  • keyFile - Path to SSH private key file. For details on how to configure connection using SSH key, see SSH public key authentication on OpenVMS
  • skipSignatureVerification - Skip signature verification. Set it to 'true' if an error 'Handshake failed: signature verification failed' occurs.

Required fields are:

  • host
  • username

You may use either password or key file to establish connection:

  • keyFile
  • password

If keyFile is not set, password is used. If neither password nor keyFile is specified, you will be prompted to enter your password during the connection attempt.

Host Collection

If you need to connect to different servers when working on your project, it makes sense to create a list of required connections to be able to quickly connect to any of them. You can do this by adding all the required connections to the Host Collection list.

Adding a new host to collection

To add a new host to the collection:

  1. Copy the ssh connection template to host-collection.hosts array:
  2. "host-collection": {
        "hosts": [
            {
                "host": "<First>",
                "keyFile": "",
                "password": "",
                "port": 22,
                "username": "",
                "skipSignatureVerification": false
            }
        ]
    }
  3. Specify connection parameters
  4. Make sure that label parameter is set.

Selecting which connection to use

To use one of connections from the host collection section, copy the value of label and paste it in angle brackets (<label>) to the host field in the connection section.

Example

{
    "connection": {
        "host": "<MySSHConnection>",
        "keyFile": "",
        "password": "",
        "port": 22,
        "username": "",
        "skipSignatureVerification": false
    },
    "host-collection": {
        "hosts": [
            {
                "host": "10.10.6.1",
                "keyFile": "",
                "password": "myPassword",
                "port": 22,
                "username": "user",
                "skipSignatureVerification": true,
                "label": "MySSHConnection"
            }
        ]
    }
}
NOTE: If you use VSC type of configuration, you will not be able to specify host collection in UI. Instead, you need to click "Edit in settings.json" and specify them in the settings.json file. 

Ssh collection hosts.png

Timeouts

You can define SSH connection timeouts in this section.

  • cmdTimeout - Timeout for command response. If a command is sent to the OpenVMS system and the OpenVMS system does not a send response for the specified period of time, it will be considered as rejected.
  • feedbackTimeout - If the SSH connection does not send feedback for the specified interval, the password will be considered as invalid.
  • welcomeTimeout - If the SSH shell prompt is not received within this interval, the shell will be closed.
NOTE: Value "0" means, that timeout is not used. 
WARN: Do not change timeout settings unless necessary.

Example

"timeouts": {
    "cmdTimeout": 0,
    "feedbackTimeout": 0,
    "welcomeTimeout": 0
}

Terminal

Specifies command to start the shell in the VS Code integrated terminal.

  • Command - command to start the shell.
NOTE: It is possible to use variables in the command. The syntax is: ${variable} or ${varable?<text if variable isn't empty>}. Supported variables: host, port, username, password, and keyFile.
NOTE: password may come from settings or UI prompt that is shown if the password is not specified in settings. Passwords entered in the terminal are not saved.

Example

"terminal": {
    "command": "ssh -oHostKeyAlgorithms=+ssh-dss ${keyFile?-i ${keyFile}} ${username?${username}@}${host}"
}