PowerShell

RSA Hash Binary Data and Sign (and Verify)

See more RSA Examples

Demonstrates how to sign the hash of binary data. Also demonstrates how to verify the RSA signature. PowerShell

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

$success = $false

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

# Load an RSA private key for signing.
$privKey = New-Object Chilkat.PrivateKey
$success = $privKey.LoadEncryptedPemFile("qa_data/pem/rsa_passwd.pem","passwd")
if ($success -eq $false) {
    $($privKey.LastErrorText)
    exit
}

$rsa = New-Object Chilkat.Rsa
$rsa.UsePrivateKey($privKey)

# We have some binary data (in hex) to sign
$originalData = "0102030405060708090A"
$bdData = New-Object Chilkat.BinData
$bdData.AppendEncoded($originalData,"hex")

# Hash (SHA-256) and sign the hash:
$bdSignature = New-Object Chilkat.BinData
$success = $rsa.SignBd($bdData,"sha256",$bdSignature)
if ($success -eq $false) {
    $($rsa.LastErrorText)
    exit
}

# Show the RSA signature in base64
$($bdSignature.GetEncoded("base64"))

# ------------------------------------------
# Get the public key from the private key
$pubKey = New-Object Chilkat.PublicKey
$privKey.ToPublicKey($pubKey)

# Verify the signature..
$rsa2 = New-Object Chilkat.Rsa
$rsa2.UsePublicKey($pubKey)

$bVerified = $rsa2.VerifyBd($bdData,"sha256",$bdSignature)
$("signature verified: " + $bVerified)