add dedicated Ed25519Signature2018 support

Signed-off-by: F-Node-Karlsruhe <[email protected]>
european-epc-competence-center · Jun 5, 2023 · 4b3b930 · 4b3b930
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Showing 4 changed files with 91 additions and 6 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,8 @@ VC Verifier Changelog
 WIP
 ---
 
+- use hash of proof as COM identifier
+- support Ed25519Signature2018 crypto suite
 
 1.5.1 (2023-06-01)
 ---

diff --git a/api/package-lock.json b/api/package-lock.json
diff --git a/api/package.json b/api/package.json
@@ -29,6 +29,7 @@
     "@digitalbazaar/data-integrity": "^1.4.0",
     "@digitalbazaar/did-method-key": "^3.0.0",
     "@digitalbazaar/ecdsa-sd-2023-cryptosuite": "^1.0.2",
+    "@digitalbazaar/ed25519-signature-2018": "^4.0.0",
     "@digitalbazaar/ed25519-signature-2020": "^5.0.0",
     "@digitalbazaar/vc": "^5.0.0",
     "@digitalbazaar/vc-revocation-list": "^5.0.0",

diff --git a/api/src/services/verifier/index.ts b/api/src/services/verifier/index.ts
@@ -1,6 +1,8 @@
 // @ts-ignore
 import { verifyCredential, verify } from '@digitalbazaar/vc';
 // @ts-ignore
+import { Ed25519Signature2018 } from '@digitalbazaar/ed25519-signature-2018';
+// @ts-ignore
 import { Ed25519Signature2020 } from '@digitalbazaar/ed25519-signature-2020';
 // @ts-ignore
 import { checkStatus } from '@digitalbazaar/vc-revocation-list';
@@ -18,14 +20,18 @@ const { purposes: { AssertionProofPurpose } } = jsigs;
 
 function getSuite(proof: Proof): unknown[] {
 
-    // Ed25519Signature2020 is backwards compatible to Ed25519Signature2018
-    if (['Ed25519Signature2020', 'Ed25519Signature2018'].includes(proof.type)) return new Ed25519Signature2020();
+    switch (proof.type) {
+
+        case 'Ed25519Signature2018': return new Ed25519Signature2018();
 
-    if (proof.type == 'DataIntegrityProof') return new DataIntegrityProof({
-        cryptosuite: createVerifyCryptosuite()
-    });
+        case 'Ed25519Signature2020': return new Ed25519Signature2020();
 
-    throw new Error(`${proof.type} not implemented`);
+        case 'DataIntegrityProof': return new DataIntegrityProof({
+            cryptosuite: createVerifyCryptosuite()
+        });
+
+        default: throw new Error(`${proof.type} not implemented`);
+    }
 
 }