decrypt oracle sql developer password using PowerShell

decryptSqlDb.ps1

function Get-DecryptedPassword	{
	[CmdletBinding()]
	param (
		[Parameter(ValueFromPipelineByPropertyName)]
		[securestring]
		$EncryptedPassword = (Get-Content -Path 'C:\Users\B0649033\AppData\Roaming\SQL Developer\system*\o.jdeveloper.db.connection\connections.json' | ConvertFrom-Json | ForEach-Object { $_.connections.info } | Out-ConsoleGridView -Title "Choose connection" -OutputMode Single | ConvertTo-SecureString -AsPlainText -Force ),
		[Parameter(ValueFromPipelineByPropertyName)]
		[string]
		$DbSystemId = (([xml]$(Get-Content -Path "$env:APPDATA\SQL Developer\system*\o.sqldeveloper\product-preferences.xml")) | ForEach-Object { $_.preferences.value } | Where-Object -FilterScript { $_.n -eq 'db.system.id' } | Select-Object -ExpandProperty v -Unique -First 1)
	)
	[byte[]]$PasswordBytes = [System.Convert]::FromBase64String(($EncryptedPassword | ConvertFrom-SecureString -AsPlainText))
	[byte[]]$Salt = [System.Convert]::FromHexString('051399429372e8ad')  # Magic salt
	$Key = $DbSystemId + $Salt
	try {
		$MessageDigestFive = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
		foreach ($null in 0..42) { $Key = $MessageDigestFive.ComputeHash($Key) }  # 43 rounds of hashing
	}
	finally {
		$MessageDigestFive.Dispose()
	}
	$SecretKey = $Key[0..7]  # First 8 bytes
	$InitializationVector = $Key[8..($Key.Length - 1)]  # Remaining bytes
	try {
		[System.Security.Cryptography.DESCryptoServiceProvider]$provider = New-Object -TypeName System.Security.Cryptography.DESCryptoServiceProvider
		try {
			[System.Security.Cryptography.ICryptoTransform]$transform = $provider.CreateDecryptor($SecretKey, $InitializationVector)
			try {
				[System.IO.MemoryStream]$memoryStream = New-Object -TypeName System.IO.MemoryStream -ArgumentList @($PasswordBytes, $true)
				try {
					[System.Security.Cryptography.CryptoStream]$cryptoStream = New-Object -TypeName System.Security.Cryptography.CryptoStream($memoryStream, $transform, [System.Security.Cryptography.CryptoStreamMode]::Write)
					$cryptoStream.Write($PasswordBytes, 0, $PasswordBytes.Length)
					try {
						[System.IO.StreamReader]$streamReader = New-Object -TypeName System.IO.StreamReader($cryptoStream)
						$streamReader.ReadToEnd()
					}
					finally {
						$streamReader.Dispose()
					}
				}
				finally {
					$cryptoStream.Dispose()
				}
			}
			finally {
				$memoryStream.Dispose()
			}
		}
		finally {
			$transform.Dispose()
		}
	}
	finally {
		$provider.Dispose()
	}
}