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

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

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

require 'chilkat'

# 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 = Chilkat::CkCert.new()

# Load an ECC private key from a PEM file.
success = cert.LoadPfxFile("c:/temp/myPfx.pfx","pfxPassword")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

jwt = Chilkat::CkJwt.new()

# Build the JOSE header
jose = Chilkat::CkJsonObject.new()
# Note: The IsEcdsa function was added in Chilkat v10.1.0
if (cert.IsEcdsa() == 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")
end

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

# Now build the JWT claims (also known as the payload)
claims = Chilkat::CkJsonObject.new()
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.put_AutoCompact(true)

# Create the JWT token.
token = jwt.createJwtCert(jose.emit(),claims.emit(),cert)

print token + "\n";

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