Built as part of TrustNet.

Information

This is a work-in-progress implementation of the Verifiable Credentials data model.

Highly experimental, incomplete, and not ready for production use! Use at your own risk! Pull requests welcome.

Maven

First, you need to build the ld-signatures-java project.

After that, just run:

mvn clean install

Dependency:

<dependency>
	<groupId>fi.trustnet</groupId>
	<artifactId>verifiable-credentials-java</artifactId>
	<version>0.1-SNAPSHOT</version>
	<scope>compile</scope>
</dependency>

Example

Example Verifiable Credential:

{
"@context": [
	"https://w3id.org/credentials/v1",
	"https://trafi.fi/credentials/v1"
],
"id": "did:sov:1yvXbmgPoUm4dl66D7KhyD#cred-12",
"type": ["Credential", "DriversLicenseCredential"],
"issuer": "did:sov:1yvXbmgPoUm4dl66D7KhyD",
"issued": "2018-01-01",
"claim": {
	"id": "did:sov:21tDAKCERh95uGgKbJNHYp",
	"driversLicense": {
		"licenseClass": "trucks"
	}
},
"revocation": {
	"id": "https://trafi.fi/revocations/738",
	"type": "SimpleRevocationList2017"
},
"signature": {
	"type" : "RsaSignature2017",
	"creator" : "did:sov:23YD3dyHuyFvLpLC3zF58F#key1",
	"created" : "2018-01-01T21:19:10Z",
	"domain" : null,
	"nonce" : "c0ae1c8e-c7e7-469f-b252-86e6a0e7387e",
	"signatureValue" : "eyJhbGciOiJSUzI1NiIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..T4UsGO5U8GDdVXb9ZvPkKU8ZExpCjqfJ3jd6q7N25heV2TLJq7HQ3clUsWy73gnQdP7l-moMWes4v_hgfwEMhML0Oz9cWqVTh0PuZNV0CyMTy6Z3hEnDdg1yvk07-Yph5O-dday8_gtinXaeirtGwTIYTCaaUv3EbtB97XeRjF5AYIheZrLgFVXy2XMGIdljwGwITYxvlFYpKUDawGduZoJ2a1RCbNySEHiUCn7-8bsl2ozxuygLYDqK2x33N0wzY8KVwSK6aoN1eRxfsV0RAFSSSiFexuclGzCGgiSkM58wcabUPPsbsXfo0aNMUK-ULrHOF_5THKIjpSbfNx6B6A"
  }
}

Example code:

VerifiableCredential verifiableCredential = new VerifiableCredential();
verifiableCredential.getContext().add("https://trafi.fi/credentials/v1");
verifiableCredential.getType().add("DriversLicenseCredential");
verifiableCredential.setId(URI.create("urn:uuid:" + UUID.randomUUID()));
verifiableCredential.setIssuer(URI.create("did:sov:1yvXbmgPoUm4dl66D7KhyD"));
verifiableCredential.setIssued("2018-01-01");

verifiableCredential.setSubject("did:sov:21tDAKCERh95uGgKbJNHYp");
LinkedHashMap<String, Object> jsonLdClaimsObject = verifiableCredential.getJsonLdClaimsObject();
LinkedHashMap<String, Object> jsonLdDriversLicenseObject = new LinkedHashMap<String, Object> ();
jsonLdDriversLicenseObject.put("licenseClass", "trucks");
jsonLdClaimsObject.put("driversLicense", jsonLdDriversLicenseObject);

URI creator = URI.create("did:sov:1yvXbmgPoUm4dl66D7KhyD#key1");
String created = "2018-01-01T21:19:10Z";
String domain = null;
String nonce = "c0ae1c8e-c7e7-469f-b252-86e6a0e7387e";

RsaSignature2017LdSigner signer = new RsaSignature2017LdSigner(creator, created, domain, nonce, TestUtil.testRSAPrivateKey);
LdSignature ldSignature = signer.sign(verifiableCredential.getJsonLdObject());

Example code:

LinkedHashMap<String, Object> jsonLdObject = (LinkedHashMap<String, Object>) JsonUtils.fromString(TestUtil.read(ValidateTest.class.getResourceAsStream("verifiable-credential.test.jsonld")));
VerifiableCredential verifiableCredential = VerifiableCredential.fromJsonLdObject(jsonLdObject);

RsaSignature2017LdValidator validator = new RsaSignature2017LdValidator(TestUtil.testRSAPublicKey);
boolean validate = validator.validate(verifiableCredential.getJsonLdObject());

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