(PowerShell) Create JWT using a Certificate's Private Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using a certificate's private key.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

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

# Demonstrates how to create a JWT using an certificate's private key.

$cert = New-Object Chilkat.Cert

# Load an ECC private key from a PEM file.
$success = $cert.LoadPfxFile("c:/temp/myPfx.pfx","pfxPassword")
if ($success -ne $true) {
    $($cert.LastErrorText)
    exit
}

$jwt = New-Object Chilkat.Jwt

# Build the JOSE header
$jose = New-Object Chilkat.JsonObject
# Note: The IsEcdsa function was added in Chilkat v10.1.0
if ($cert.IsEcdsa() -eq $true) {
    # Use ES256.  Pass the string "ES384" or "ES512" to use ECC with SHA-384 or SHA-512.
    $jose.AppendString("alg","ES256")
}
else {
    # Probably RSA...
    # Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
    $jose.AppendString("alg","RS256")
}

$jose.AppendString("typ","JWT")

# Now build the JWT claims (also known as the payload)
$claims = New-Object Chilkat.JsonObject
$claims.AppendString("iss","http://example.org")
$claims.AppendString("sub","John")
$claims.AppendString("aud","http://example.com")

# Set the timestamp of when the JWT was created to now.
$curDateTime = $jwt.GenNumericDate(0)
$claims.AddIntAt(-1,"iat",$curDateTime)

# Set the "not process before" timestamp to now.
$claims.AddIntAt(-1,"nbf",$curDateTime)

# Set the timestamp defining an expiration time (end time) for the token
# to be now + 1 hour (3600 seconds)
$claims.AddIntAt(-1,"exp",$curDateTime + 3600)

# Produce the smallest possible JWT:
$jwt.AutoCompact = $true

# Create the JWT token.
$token = $jwt.CreateJwtCert($jose.Emit(),$claims.Emit(),$cert)

$($token)

# Example output:
# eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNDg1NzA4NzkyLCJuYmYiOjE0ODU3MDg3OTIsImV4cCI6MTQ4NTcxMjM5Mn0.wqsuyJpxJ073ox-lOiLFqG1lQocXe4hGf2XGZJRrO3qn0UusxI_bu3Gzky8gBsH4sA4u9TWZn5M-1wYMMIJk6Q