Powershell: specify email:password with random data in between

问题

Similar like this - Extract email:password

However we have here the situation that in some files there is other data between the data I want to parse, as example:

email:lastname:firstname:password or email:lastname:firstname:dob:password

So my question is - with which command would I be able to ignore 2 segments like "lastname:firstname" or even 3 parts "lastname:firstname:dob". I am using the below regex to retrieve email:password from a big list.

$sw = [System.IO.StreamWriter]::new("$PWD/out.txt")

switch -regex -file in.txt { 
   '(?<=:)[^@:]+@[^:]+:.*' { $sw.WriteLine($Matches[0]) } 
}

$sw.Close()

回答1:

You need to refine your regex:

# Create sample input file
@'
...:foo@example.org:password1
...:bar@example.org:lastname:firstname:password2
...:baz@example.org:lastname:firstname:dob:password3
'@ > in.txt

# Process the file line by line.
switch -regex -file in.txt { 
  '(?<=:)([^@:]+@[^:]+)(?:.*):(.*)' { '{0}:{1}' -f $Matches[1], $Matches[2] } 
}

For brevity, saving the output to a file was omitted above, so the email-password pairs extracted print to the screen by default, namely as:

foo@example.org:password1
bar@example.org:password2
baz@example.org:password3

Explanation of the regex:

(?<=:) is a positive lookbehind assertion for ensuring that matching starts right after a : character.
- Note: I based this requirement on your original question and its sample data.
([^@:]+@[^:]+) uses a capture group (capturing subexpression, (...)) to match an email address up to but not including the next :.
(?:.*): uses a non-capturing subexpression ((?:...)) that matches zero or more characters (.*) unconditionally followed by a :
(.*) uses a capture group to capture all remaining characters after what is effectively the last : on each line, assumed to be the password.
$Matches[1] and $Matches[2] refer to the 1st and 2nd capture-group matches, i.e. the email address and the password.

回答2:

Assuming you had data like this:

"lastname:firstname" 
"lastname:firstname:dob"
"lastname:firstname:password:somepassword" 
"lastname:john:firstname:jacob:password:dingleheimershmit

You can move through each row like this:

$items = gc .\stack.txt

ForEach($item in $items){

}

Then we can split each row on a : character and check each of those to see if its a match for the string passwrod. If it is, then we check the next token in the row which should be a password.

This code will get you going, you'll just need to do something meaningful with $password.

$items = gc .\stack.txt

ForEach($item in $items){
    "processing $item"
    $tokens = $item.Split(":")
    For($x=0; $x -lt $tokens.Count;$x++){
        $token = $tokens[$x]
        
        #"Checking if $token is like password"
        if ($token -match "password"){
            "since this token is like password, checking next token which should be a password"
            $password = $tokens[$x+1]
            Write-Host -ForegroundColor Yellow $password
        }            
    
    }
}

来源：https://stackoverflow.com/questions/65495920/powershell-specify-emailpassword-with-random-data-in-between

标签

powershell