(Perl) JWE using ECDH-ES, BP-256, A256GCM

See more JSON Web Encryption (JWE) Examples

Create a JWE with the following header:

	{
	  "alg": "ECDH-ES",
	  "enc": "A256GCM",
	  "exp": 1621957030,
	  "cty": "NJWT",
	  "epk": {
	    "kty": "EC",
	    "x": "QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w"
	    "y": "AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu"
	    "crv": "BP-256"
	  }
	}

Note: This example requires Chilkat v9.5.0.87 or greater.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

# Load our brainpool BP-256 public key.

# 	{
# 	  "use": "enc",
# 	  "kid": "puk_idp_enc",
# 	  "kty": "EC",
# 	  "crv": "BP-256",
# 	  "x": "QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w",
# 	  "y": "AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu"
# 	}

$json = chilkat::CkJsonObject->new();
$json->UpdateString("use","enc");
$json->UpdateString("kid","puk_idp_enc");
$json->UpdateString("kty","EC");
$json->UpdateString("crv","BP-256");
$json->UpdateString("x","QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w");
$json->UpdateString("y","AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu");

$pubkey = chilkat::CkPublicKey->new();

$success = $pubkey->LoadFromString($json->emit());
if ($success == 0) {
    print $pubkey->lastErrorText() . "\r\n";
    exit;
}

# Build our protected header:

# 	{
# 	  "alg": "ECDH-ES",
# 	  "enc": "A256GCM",
# 	  "exp": 1621957030,
# 	  "cty": "NJWT",
# 	  "epk": {
# 	    "kty": "EC",
# 	    "x": "QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w"
# 	    "y": "AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu"
# 	    "crv": "BP-256"
# 	  }
# 	}

# Use jwt only for getting the current date/time + 3600 seconds.
$jwt = chilkat::CkJwt->new();

$jweProtHdr = chilkat::CkJsonObject->new();
$jweProtHdr->UpdateString("alg","ECDH-ES");
$jweProtHdr->UpdateString("enc","A256GCM");
$jweProtHdr->UpdateInt("exp",$jwt->GenNumericDate(3600));
$jweProtHdr->UpdateString("cty","NJWT");
$jweProtHdr->UpdateString("epk.kty","EC");
$jweProtHdr->UpdateString("epk.x","QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w");
$jweProtHdr->UpdateString("epk.y","AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu");
$jweProtHdr->UpdateString("epk.crv","BP-256");

$jwe = chilkat::CkJwe->new();
$jwe->SetProtectedHeader($jweProtHdr);
$jwe->SetPublicKey(0,$pubkey);

$plainText = "This is the text to be encrypted.";
$strJwe = $jwe->encrypt($plainText,"utf-8");
if ($jwe->get_LastMethodSuccess() != 1) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

print $strJwe . "\r\n";

print "Success." . "\r\n";