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#!/bin/bash

# Path to your Java keystore
KEYSTORE_PATH="/path/to/your/keystore.jks"
# Keystore password
KEYSTORE_PASSWORD="your_keystore_password"

# Number of days for expiration threshold
EXPIRATION_THRESHOLD=30

# Get current date in epoch format
CURRENT_DATE=$(date +%s)

# Loop through each entry in the keystore
while IFS=' ' read -r alias; do
    # Get certificate expiration date
    expiration_date=$(keytool -list -v -keystore "$KEYSTORE_PATH" -storepass "$KEYSTORE_PASSWORD" -alias "$alias" | grep Valid | awk -F ',' '{print $2}' | sed 's/^[ \t]*//')

    # Convert expiration date to epoch format
    expiration_epoch=$(date -d "$expiration_date" +%s)

    # Calculate days until expiration
    days_until_expiration=$(( (expiration_epoch - CURRENT_DATE) / 86400 ))

    if (( days_until_expiration <= 0 )); then
        echo "Certificate '$alias' has already expired!"
    elif (( days_until_expiration <= EXPIRATION_THRESHOLD )); then
        echo "Certificate '$alias' will expire in $days_until_expiration days."
    fi
done < <(keytool -list -keystore "$KEYSTORE_PATH" -storepass "$KEYSTORE_PASSWORD" | grep "Alias name:" | awk -F ': ' '{print $2}')

exit 0

# Path to your Java keystore
$KeyStorePath = "C:\path\to\your\keystore.jks"

# Keystore password
$KeyStorePassword = "your_keystore_password"

# Number of days for expiration threshold
$ExpirationThreshold = 30

# Get the current date
$CurrentDate = Get-Date

# Load the keystore
$Keystore = [Security.Cryptography.X509Certificates.X509Certificate2Collection]::new()
$Keystore.Import($KeyStorePath, $KeyStorePassword, [Security.Cryptography.X509Certificates.X509KeyStorageFlags]::DefaultKeySet)

# Loop through each certificate in the keystore
foreach ($cert in $Keystore) {
    $expirationDate = $cert.NotAfter

    # Calculate days until expiration
    $daysUntilExpiration = ($expirationDate - $CurrentDate).Days

    if ($expirationDate -lt $CurrentDate) {
        Write-Host "Certificate '$($cert.Subject)' has already expired!"
    }
    elseif ($daysUntilExpiration -le $ExpirationThreshold) {
        Write-Host "Certificate '$($cert.Subject)' will expire in $daysUntilExpiration days."
    }
}

$Keystore.Dispose()

#!/bin/bash

# Function to download SSL certificate
download_ssl_certificate() {
  local url=$1
  local port=${2:-443}
  local output_file=${3:-certificate.pem}

  # Extract the hostname from the URL
  local hostname=$(echo $url | awk -F[/:] '{print $4}')

  # Use openssl to get the certificate and save it to a file
  echo | openssl s_client -connect ${hostname}:${port} -servername ${hostname} 2>/dev/null | openssl x509 > ${output_file}

  echo "Certificate downloaded and saved as ${output_file}"
}

# Example usage
download_ssl_certificate "https://mycompany.sealights.co"

# Function to download SSL certificate
function Download-SSLCertificate {
    param (
        [string]$url,
        [int]$port = 443,
        [string]$outputFile = "certificate.cer"
    )

    $hostname = ([System.Uri]$url).Host

    $tcpClient = New-Object Net.Sockets.TcpClient
    $tcpClient.Connect($hostname, $port)
    $sslStream = New-Object Net.Security.SslStream($tcpClient.GetStream(), $false, ({$true}))
    $sslStream.AuthenticateAsClient($hostname)

    $cert = $sslStream.RemoteCertificate
    $bytes = $cert.Export([System.Security.Cryptography.X509Certificates.X509ContentType]::Cert)
    [System.IO.File]::WriteAllBytes($outputFile, $bytes)

    $sslStream.Close()
    $tcpClient.Close()

    Write-Output "Certificate downloaded and saved as $outputFile"
}

# Example usage
Download-SSLCertificate -url "https://mycompany.sealights.co"