(Ruby) Create JWT using a Brainpool EC Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an EC private key. This is for JOSE headers having an "alg" member with any of the following values:

• BP160R1
• BP192R1
• BP224R1
• BP256R1
• BP320R1
• BP384R1
• BP512R1

This example also demonstrates how to include time constraints:

• nbf: Not Before Time
• exp: Expiration Time
• iat: Issue At Time

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# Demonstrates how to create a JWT using a brainpool EC private key.

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

privKey = Chilkat::CkPrivateKey.new()

# Load a brainpool EC key.
success = privKey.LoadPemFile("c:/qa_data/pem/ec_brainpool_privKey.pem")
if (success != true)
    print privKey.lastErrorText() + "\n";
    exit
end

# You can examine the curve name of the key you just loaded by getting the private in XML format:
# <ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>
print privKey.getXml() + "\n";

jwt = Chilkat::CkJwt.new()

# Build the JOSE header
jose = Chilkat::CkJsonObject.new()
# Use the brainpool curve name matching the private key you just loaded.
# Use "BP256R1", or "BP384R1", etc.   
success = jose.AppendString("alg","BP256R1")
success = jose.AppendString("typ","JWT")

# Now build the JWT claims (also known as the payload)
claims = Chilkat::CkJsonObject.new()
success = claims.AppendString("iss","http://example.org")
success = claims.AppendString("sub","John")
success = claims.AppendString("aud","http://example.com")

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

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

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

# Produce the smallest possible JWT:
jwt.put_AutoCompact(true)

# Create the JWT token.  This is where the ECC signature is created.
token = jwt.createJwtPk(jose.emit(),claims.emit(),privKey)

print token + "\n";