(PowerShell) RSA Decrypt using PEM

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file.

Note: This example requires Chilkat v11.0.0 or greater.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$rsa = New-Object Chilkat.Rsa

$key = New-Object Chilkat.PrivateKey

# Load an RSA private key from an unencrypted PEM file:
# (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

$success = $key.LoadPemFile("qa_data/rsa/decryptTest/priv.pem")
if ($success -eq $false) {
    $($key.LastErrorText)
    exit
}

# Make the key available to the RSA object
$success = $rsa.UsePrivateKey($key)
if ($success -eq $false) {
    $($rsa.LastErrorText)
    exit
}

$encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA=="

$rsa.EncodingMode = "base64"

$usePrivateKey = $true
$decryptedStr = $rsa.DecryptStringENC($encryptedStr,$usePrivateKey)

$("Decrypted:")
$($decryptedStr)