Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

require 'chilkat'

success = false

jws = Chilkat::CkJws.new()

#  Load the JWS compact serialization.
jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
success = jws.LoadJws(jwsCompact)
if (success == false)
    print jws.lastErrorText() + "\n";
    exit
end

#  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
#  signature is cryptographically valid, 0 when it is not, or a negative value on error.
base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws.SetMacKey(0,base64Key,"base64")
if (success == false)
    print jws.lastErrorText() + "\n";
    exit
end

v = jws.Validate(0)
if (v < 0)
    print jws.lastErrorText() + "\n";
    exit
end

if (v != 1)
    print "The signature is not valid." + "\n";
    exit
end

print "The signature is valid." + "\n";