This library is deprecated and continued as data-integrity-java.
It provides an implementation of the following cryptographic suites for Linked Data Proofs:
- Ed25519Signature2018
- Ed25519Signature2020
- EcdsaSecp256k1Signature2019
- RsaSignature2018
- JsonWebSignature2020
- JcsEd25519Signature2020
- JcsEcdsaSecp256k1Signature2019
Build:
mvn clean install
Dependency:
<repositories>
<repository>
<id>danubetech-maven-public</id>
<url>https://repo.danubetech.com/repository/maven-public/</url>
</repository>
</repositories>
<dependency>
<groupId>info.weboftrust</groupId>
<artifactId>ld-signatures-java</artifactId>
<version>1.6.0</version>
</dependency>
Example JSON-LD document:
{
"@context": {
"schema": "http://schema.org/",
"name": "schema:name",
"homepage": "schema:url",
"image": "schema:image"
},
"name": "Manu Sporny",
"homepage": "https://manu.sporny.org/",
"image": "https://manu.sporny.org/images/manu.png"
}
Example code:
JsonLDObject jsonLdObject = JsonLDObject.fromJson(new FileReader("input.jsonld"));
byte[] testEd25519PrivateKey = Hex.decodeHex("984b589e121040156838303f107e13150be4a80fc5088ccba0b0bdc9b1d89090de8777a28f8da1a74e7a13090ed974d879bf692d001cddee16e4cc9f84b60580".toCharArray());
Ed25519Signature2018LdSigner signer = new Ed25519Signature2018LdSigner(testEd25519PrivateKey);
signer.setCreated(new Date());
signer.setProofPurpose(LDSecurityKeywords.JSONLD_TERM_ASSERTIONMETHOD);
signer.setVerificationMethod(URI.create("https://example.com/jdoe/keys/1"));
signer.setDomain("example.com");
signer.setNonce("343s$FSFDa-");
LdProof dataIntegrityProof = signer.sign(jsonLdObject);
System.out.println(jsonLdObject.toJson(true));
Example Linked Data Proof:
{
"type": "Ed25519Signature2018",
"created": "2020-10-15T09:42:46Z",
"domain": "example.com",
"nonce" : "343s$FSFDa-",
"proofPurpose": "assertionMethod",
"verificationMethod": "https://example.com/jdoe/keys/1",
"jws": "eyJiNjQiOmZhbHNlLCJjcml0IjpbImI2NCJdLCJhbGciOiJFZERTQSJ9..8sFJcDtO_pYLjIkJNKfIOL3IOgm_bpbOqqr8ha0ZDa-e6XorbywVQmFCATNXPqMV10deru-zajF79tVelKo-Bw"
}
Danube Tech - https://danubetech.com/
Originally built during Rebooting Web-of-Trust in Paris on April 21st 2017.
This software library is part of a project that has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 871932