Service interation 1. sshd with key authentication 2. JSON and Restful API with bash, php , python, powershell

1. Service Intergration
Jang Jaemin
jaeminj@gmail.com

2. Openssh + authentication key(1)
fabio@morpheus:~$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/fabio/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/fabio/.ssh/id_rsa.
Your public key has been saved in /home/fabio/.ssh/id_rsa.pub.
The key fingerprint is:
44:3e:ef:58:94:15:52:c2:88:ca:ab:21:43:53:3d:42 fabio@morpheus
fabio@morpheus:~$
fabio@morpheus:~$ ssh-keygen -p
Enter file in which the key is (/home/fabio/.ssh/id_rsa):
Key has comment '/home/fabio/.ssh/id_rsa'
Enter new passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved with the new passphrase.
fabio@morpheus:~$

3. Openssh + authentication key(2)
Install the public key on the servers
fabio@morpheus:~$ ssh-copy-id -i .ssh/id_rsa.pub ornellas@apanela.com
15
ornellas@apanela.com's password:
Now try logging into the machine, with "ssh 'ornellas@apanela.com'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
fabio@morpheus:~$

4. freesshd(1)
Overview
Install and configure FreeSSHd on the server
Create keys
configure Putty to connect to the server
Install FreeSSHd
Download FreeSSHd from http://www.freesshd.com/?ctt=download
Double click to start installer on the server
As a service
Accept all other defaults

5. freesshd(2)
Configure FreeSSHd
Open FreeSSHd settings (may have to kill the service and start manually to get the GUI)
SSH tab:
Max number = 2
idle = 600
Authentication tab
Pub key folder = C:Program Files (x86)freeSSHdkeys
Password auth = disabled
Pub key auth = required
Users tab
add
login=chef
auth = 'Pub key (ssh only)'
user can use = shell
click OK

6. freesshd(3)
Generate Public and Private keys
Open PuttyGen
Click ‘Generate’
move the mouse pointer around as instructed to generate the key
Save a Putty compatible private key
Click ‘Save private key’
Save this to the client PC, Putty will need this
You should really save with a passphrase for extra security
Save OpenSSL compatible private key for Chef knife
‘Conversions’ menu > ‘Export OpenSSH Key’ > save as a *.pem
Save the public key
Copy the contents of ‘Public key for pasting into OpenSSH authorized file:’ and paste into a textfile.
rename this file ‘chef’ (no file extension, the filename must match the user login name created drop this file into the public key folder C:Program Files (x86)freeSSHdkeys on the server.

7. freesshd(4)
Connecting with Putty
Open Putty (or Putty portable)
Enter the IP address of the server
Connection type = SSH (obviously!)
In the left menu tree
Connection > SSH > Auth > ‘Private key file for authentication:’ > click browse
Select the private key that was generated above
Click ‘Open’
when prompted ‘login:’ > enter ‘chef’ > hit enter
If the private key was saved with a passphrase then enter this when prompted
You should now be connected to the server.
ssh -o ConnectTimeOut=10 -o Port='22' -o IdentityFile=key/'id_rsa'
-o GSSAPIAuthentication=no -o PasswordAuthentication=no
-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null
-o LogLevel=ERROR 'XXX'@'192.168.XXX.XXX'

8. Sshclient.php
<?
$this->cli= parent::newClass("sshclient", $ssh_conf);
$this->cli->exec( $cmd);
$data['stdout'] = $this->stdout ;
$data['stderr'] = $this->stderr;
?>

9. JSON, Rest Api , bash, PHP,
Powershell

10. Json (Javascript Object Notation)
{
"glossary": {
"title": "example glossary",
"GlossDiv": {
"title": "S",
"GlossList": {
"GlossEntry": {
"ID": "SGML",
"SortAs": "SGML",
"GlossTerm": "Standard Generalized Markup Language",
"Acronym": "SGML",
"Abbrev": "ISO 8879:1986",
"GlossDef": {
"para": "A meta-markup language, used to create markup languages such as DocBook.",
"GlossSeeAlso": ["GML", "XML"]
},
"GlossSee": "markup"
}
}
}
}
}

11. Restful api
HTTP Method URI Action
GET http://[hostname]/todo/api/v1.0/tasks
Retrieve list of
tasks
GET
http://[hostname]/todo/api/v1.0/tasks/
[task_id]
Retrieve a task
POST http://[hostname]/todo/api/v1.0/tasks
Create a new
task
PUT
http://[hostname]/todo/api/v1.0/tasks/
[task_id]
Update an
existing task
DELETE
http://[hostname]/todo/api/v1.0/tasks/
[task_id]
Delete a task

12. PHP Server Side (1)
<?php
switch ($_SERVER['REQUEST_METHOD'] ) {
case 'PUT':
case 'POST':
case 'GET':
case 'HEAD':
case 'DELETE':
case 'OPTIONS':
break;
default:
break;
}
?>
.htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-s
RewriteRule ^(.*)$ api.php?rquest=$1 [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.*)$ api.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} -s
RewriteRule ^(.*)$ api.php [QSA,NC,L]
</IfModule>

13. PHP Server Side (2)
<?php
$request = file_get_contents('php://input');
// return associative array of JSON
$input = json_decode($request, true);
$input['request'] = $request;
$input['rx_datetime'] = date('Y-m-d H:i:s') ;
header("Content-type: application/json");
echo json_encode($input);
?>

14. Bash
curl -i -X POST -H "Content-Type: application/json ; charset=UTF-8"
-d '{"username":"xyz","password":"xyz"}' http://localhost:3000/api/login
curl -i -d @credentials.json -H "Content-Type: application/json"
http://localhost:3000/api/login
-X [PUT | POST | GET | DELETE]
http://blogs.plexibus.com/2010/04/12/rest-esting-with-curl-file-handling/

15. PHP
<?
$data = array("name" => "Hagrid", "age" => "36");
$data_string = json_encode($data);
$ch = curl_init('http://api.local/rest/users');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string))
);
$result = curl_exec($ch, true);
curl_Close($ch)
$data = json_decode($result, true) ;
print_r($data)
?>

16. Powershell Client(1)
http://www.powershellcookbook.com/recipe/Vlhv/interact-with-rest-based-web-apis
Invoke-RestMethod cmdlet
PS > $url = "https://api.stackexchange.com/2.0/questions/unanswered" +
"?order=desc&sort=activity&tagged=powershell&pagesize=10&site=stackoverflow"
PS > $result = Invoke-RestMethod $url
PS > $result.Items | Foreach-Object { $_.Title; $_.Link; "" }
PS> $contact = @{
first_name="Jack";
last_name="Smith";
emails=@{preferred="jsmith@contoso.com";business="Jack.Smith@contoso.com"}
} | ConvertTo-Json
PS> Invoke-RestMethod -Uri "$ApiUri/me/contacts?access_token=$AccessToken"
-Method Post -ContentType "application/json" -Body $contact

17. Powershell Client(2)
$url = "http://www.seismi.org/api/eqs"
$request = [System.Net.WebRequest]::Create($url)
$request.Method="Get"
$response = $request.GetResponse()
$requestStream = $response.GetResponseStream()
$readStream = New-Object System.IO.StreamReader $requestStream
$data=$readStream.ReadToEnd()
if($response.ContentType -match "application/xml") {
$results = [xml]$data
} elseif($response.ContentType -match "application/json") {
$results = $data | ConvertFrom-Json
} else {
try {
$results = [xml]$data
} catch {
$results = $data | ConvertFrom-Json
}
}
$results