Perl

Create JWT Using HS256, HS384, or HS512

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using HS256, HS384, or HS512. (HS256 is JWT's acronym for HMAC-SHA256.) When HMAC is used, the secret is a shared secret (i.e. password) that both client and server know beforehand.

This example also demonstrates how to include time constraints:

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

Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates how to create an HMAC JWT using a shared secret (password).

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

my $jwt = Chilkat2::Jwt->new;

# Build the JOSE header
my $jose = Chilkat2::JsonObject->new;
# Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
my $success = $jose->AppendString('alg', 'HS256');
$success = $jose->AppendString('typ', 'JWT');

# Now build the JWT claims (also known as the payload)
my $claims = Chilkat2::JsonObject->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.
my $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->AutoCompact(1);

my $strJwt = $jwt->CreateJwt($jose->Emit(), $claims->Emit(), 'secret');

print $strJwt, "\n";