Rust

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.

Rust

// 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"
// 	}

let json = chilkat::JsonObject::new();
let _ = json.update_string("use", "enc");
let _ = json.update_string("kid", "puk_idp_enc");
let _ = json.update_string("kty", "EC");
let _ = json.update_string("crv", "BP-256");
let _ = json.update_string("x", "QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w");
let _ = json.update_string("y", "AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu");

let pubkey = chilkat::PublicKey::new();

if pubkey.load_from_string(&json.emit().unwrap_or_default()).is_err() {
    println!("{}", pubkey.last_error_text());
    return;
}

// 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.
let jwt = chilkat::Jwt::new();

let jwe_prot_hdr = chilkat::JsonObject::new();
let _ = jwe_prot_hdr.update_string("alg", "ECDH-ES");
let _ = jwe_prot_hdr.update_string("enc", "A256GCM");
let _ = jwe_prot_hdr.update_int("exp", jwt.gen_numeric_date(3600));
let _ = jwe_prot_hdr.update_string("cty", "NJWT");
let _ = jwe_prot_hdr.update_string("epk.kty", "EC");
let _ = jwe_prot_hdr.update_string("epk.x", "QLpJ_LpFx-6yJhsb4OvHwU1khLnviiOwYOvmf5clK7w");
let _ = jwe_prot_hdr.update_string("epk.y", "AJh7pJ3zZKDJkm8rbeG69GBooTosXJgSsvNFH0i3Vxnu");
let _ = jwe_prot_hdr.update_string("epk.crv", "BP-256");

let jwe = chilkat::Jwe::new();
let _ = jwe.set_protected_header(&jwe_prot_hdr);
let _ = jwe.set_public_key(0, &pubkey);

let plain_text = "This is the text to be encrypted.".to_string();
let Ok(str_jwe) = jwe.encrypt(&plain_text, "utf-8") else {
    println!("{}", jwe.last_error_text());
    return;
};

println!("{}", str_jwe);

println!("Success.");