Cifrar el tráfico entre un cliente y un servidor mediante el protocolo TCP/IP con un certificado X509 autofirmado en PowerShell | Operating systems, scripting, PowerShell and security

Criptografía, Lo mejor, PowerShell, Red, Seguridad

Contenidos

Servidor que envía un mensaje cifrado al cliente
Cliente que recibe un mensaje cifrado de parte del servidor

Servidor que envía un mensaje cifrado al cliente

Utiliza un certificado X509 generado anteriormente https://www.jesusninoc.com/11/18/exports-a-certificate-to-a-personal-information-exchange-pfx-file/

$Certificate = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2(,"C:\Users\juan\cert.pfx","1234")
$port = "1234"

$TcpListener = [System.Net.Sockets.TcpListener][int]$port
$TcpListener.start()

$TcpStream = $TcpListener.AcceptTcpClient()
$SslStream = New-Object System.Net.Security.SslStream $TcpStream.GetStream(), $false, ({$True} -as [Net.Security.RemoteCertificateValidationCallback])
$SslStream.AuthenticateAsServer($Certificate, $false, [System.Security.Authentication.SslProtocols]::tls, $false)

$mensaje = (New-Object System.IO.StreamWriter $SslStream)
$mensaje.Write("hola")
$mensaje.Dispose()

$TcpListener.Stop()

$Certificate = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2(,"C:\Users\juan\cert.pfx","1234")

$port = "1234"

$TcpListener = [System.Net.Sockets.TcpListener][int]$port

$TcpListener.start()

$TcpStream = $TcpListener.AcceptTcpClient()

$SslStream = New-Object System.Net.Security.SslStream $TcpStream.GetStream(), $false, ({$True} -as [Net.Security.RemoteCertificateValidationCallback])

$SslStream.AuthenticateAsServer($Certificate, $false, [System.Security.Authentication.SslProtocols]::tls, $false)

$mensaje = (New-Object System.IO.StreamWriter $SslStream)

$mensaje.Write("hola")

$mensaje.Dispose()

$TcpListener.Stop()

Cliente que recibe un mensaje cifrado de parte del servidor

Utiliza un certificado X509 generado anteriormente https://www.jesusninoc.com/11/18/exports-a-certificate-to-a-personal-information-exchange-pfx-file/

$Certificate = $null
$TcpClient = New-Object -TypeName System.Net.Sockets.TcpClient

$TcpClient.Connect("127.0.0.1", "1234")
$TcpStream = $TcpClient.GetStream()

$SslStream = New-Object System.Net.Security.SslStream $TcpStream, $false, ({$True} -as [Net.Security.RemoteCertificateValidationCallback])

$SslStream.AuthenticateAsClient((New-Object System.Security.Cryptography.X509Certificates.X509Certificate2(,"C:\Users\juan\cert.pfx","1234")))

$Certificate = $SslStream.RemoteCertificate

if ($Certificate) {
    if ($Certificate -isnot [System.Security.Cryptography.X509Certificates.X509Certificate2]) {
        $Certificate = New-Object -TypeName System.Security.Cryptography.X509Certificates.X509Certificate2 -ArgumentList $Certificate
    }

    Write-Output $Certificate
}

$mensaje = New-Object System.IO.StreamReader $SslStream
$mensaje.ReadLine()

$SslStream.Dispose()
$TcpClient.Dispose()

$Certificate = $null

$TcpClient = New-Object -TypeName System.Net.Sockets.TcpClient

$TcpClient.Connect("127.0.0.1", "1234")

$TcpStream = $TcpClient.GetStream()

$SslStream = New-Object System.Net.Security.SslStream $TcpStream, $false, ({$True} -as [Net.Security.RemoteCertificateValidationCallback])

$SslStream.AuthenticateAsClient((New-Object System.Security.Cryptography.X509Certificates.X509Certificate2(,"C:\Users\juan\cert.pfx","1234")))

$Certificate = $SslStream.RemoteCertificate

if ($Certificate) {

if ($Certificate -isnot [System.Security.Cryptography.X509Certificates.X509Certificate2]) {

$Certificate = New-Object -TypeName System.Security.Cryptography.X509Certificates.X509Certificate2 -ArgumentList $Certificate

}

Write-Output $Certificate

}

$mensaje = New-Object System.IO.StreamReader $SslStream

$mensaje.ReadLine()

$SslStream.Dispose()

$TcpClient.Dispose()

Publicado el día 11 de marzo de 2022

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Cifrar el tráfico entre un cliente y un servidor mediante el protocolo TCP/IP con un certificado X509 autofirmado en PowerShell (Seguridad, Red, PowerShell, Lo mejor, Criptografía)

Servidor que envía un mensaje cifrado al cliente

Cliente que recibe un mensaje cifrado de parte del servidor

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