examples-ldp.md

Examples

Verifiable Credentials with Linked Data Proofs:

Example Verifiable Credential

{
	"@context": ["https://www.w3.org/2018/credentials/v1", "https://trafi.fi/credentials/v1", "https://w3id.org/security/v1"],
	"type": ["VerifiableCredential", "DriversLicenseCredential"],
	"credentialSubject": {
		"id": "did:sov:21tDAKCERh95uGgKbJNHYp",
		"driversLicense": {
			"licenseClass": "trucks"
		}
	},
	"id": "urn:uuid:54ac93ea-6db3-4e7f-9ba7-7bb5d81c7e7e",
	"issuer": "did:sov:1yvXbmgPoUm4dl66D7KhyD",
	"issuanceDate": "2019-06-18T07:43:03Z",
	"proof": {
		"type": "RsaSignature2018",
		"creator": "did:sov:1yvXbmgPoUm4dl66D7KhyD#keys-1",
		"created": "2018-01-01T21:19:10Z",
		"domain": null,
		"nonce": "c0ae1c8e-c7e7-469f-b252-86e6a0e7387e",
		"signatureValue": "eyJhbGciOiJSUzI1NiIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..XiAK8PoseWt2KygoYCKjlGQyzhrpOoDrWpM2qI2dqQPZbCykyWkH6oHBx2uUhZImfQAY_Qf9rICFSF0L7BhrFMc5Jca9mdzA9jS-S3w1CcX4L-6OVykPGZC7WiPnoboHQiX517F-o-1kjV5B6zUc-kLKH4fO5HPiKkEJoY2QCRKivbr4K5sMbPhveZEGwqKwI7RLDKxXJgvdiLzJDb3wVGV0Ed3IKiAuBdT6d53n1nB3NKoCsGZeiiTCjo3QlT-VuWtc-YRIFAeRnNTKEmQxexiw2Rn5piFOtmiKgrlDSxJrOWkfNaPZq2esDsAW0-lAQqdFJf8_eURfs8SeLA5c1A"
	}
}

Example code (signing)

VerifiableCredential verifiableCredential = new VerifiableCredential();
verifiableCredential.getContext().add("https://trafi.fi/credentials/v1");
verifiableCredential.getType().add("DriversLicenseCredential");
verifiableCredential.setId("urn:uuid:" + UUID.randomUUID());
verifiableCredential.setIssuer("did:sov:1yvXbmgPoUm4dl66D7KhyD");
verifiableCredential.setIssuanceDate(new Date());

verifiableCredential.setCredentialSubject("did:sov:21tDAKCERh95uGgKbJNHYp");
LinkedHashMap<String, Object> jsonLdCredentialSubject = verifiableCredential.getJsonLdCredentialSubject();
LinkedHashMap<String, Object> jsonLdDriversLicense = new LinkedHashMap<String, Object> ();
jsonLdDriversLicense.put("licenseClass", "trucks");
jsonLdCredentialSubject.put("driversLicense", jsonLdDriversLicense);

URI creator = URI.create("did:sov:1yvXbmgPoUm4dl66D7KhyD#keys-1");
String created = "2018-01-01T21:19:10Z";
String domain = null;
String nonce = "c0ae1c8e-c7e7-469f-b252-86e6a0e7387e";

RsaSignature2018LdSigner signer = new RsaSignature2018LdSigner(creator, created, domain, nonce, TestUtil.testRSAPrivateKey);
LdSignature ldSignature = signer.sign(verifiableCredential.getJsonLdObject());

System.out.println(JsonUtils.toString(verifiableCredential.getJsonLdObject()));

Example code (verifying)

LinkedHashMap<String, Object> jsonLdObject = (LinkedHashMap<String, Object>) JsonUtils.fromString(...JSON-LD...);
VerifiableCredential verifiableCredential = VerifiableCredential.fromJsonLdObject(jsonLdObject);

RsaSignature2018LdValidator validator = new RsaSignature2018LdValidator(TestUtil.testRSAPublicKey);

System.out.println(validator.validate(verifiableCredential.getJsonLdObject()));