feat: Enhance EdAlgorithm to support Ed25519 and X25519 algorithms fo…

…r WebCrypto in Chrome, Safari, and NodeJS

src/ed_algorithm.ts

@@ -21,7 +21,16 @@ export class EdAlgorithm implements IAlgorithm {
   public toAsnAlgorithm(alg: EcKeyGenParams): AlgorithmIdentifier | null {
     let algorithm: string | null = null;
     switch (alg.name.toLowerCase()) {
+      case "ed25519":
+        // This algorithm is supported by WebCrypto API
+        algorithm = idEd25519;
+        break;
+      case "x25519":
+        // This algorithm is supported by WebCrypto API
+        algorithm = idX25519;
+        break;
       case "eddsa":
+        // This algorithm works with @peculiar/webcrypto only
         switch (alg.namedCurve.toLowerCase()) {
           case "ed25519":
             algorithm = idEd25519;
@@ -32,6 +41,7 @@ export class EdAlgorithm implements IAlgorithm {
         }
         break;
       case "ecdh-es":
+        // This algorithm works with @peculiar/webcrypto only
         switch (alg.namedCurve.toLowerCase()) {
           case "x25519":
             algorithm = idX25519;
@@ -50,14 +60,14 @@ export class EdAlgorithm implements IAlgorithm {
     return null;
   }
 
-  public toWebAlgorithm(alg: AlgorithmIdentifier): HashedAlgorithm | EcKeyGenParams | null {
+  public toWebAlgorithm(alg: AlgorithmIdentifier): HashedAlgorithm | EcKeyGenParams | Algorithm | null {
     switch (alg.algorithm) {
       case idEd25519:
-        return { name: "EdDSA", namedCurve: "Ed25519" };
+        return { name: "Ed25519" };
       case idEd448:
         return { name: "EdDSA", namedCurve: "Ed448" };
       case idX25519:
-        return { name: "ECDH-ES", namedCurve: "X25519" };
+        return { name: "X25519" };
       case idX448:
         return { name: "ECDH-ES", namedCurve: "X448" };
     }

test/crypto.ts

@@ -762,7 +762,7 @@ ZYYG
     const ok = await cert.verify({
       signatureOnly: true,
     });
-    assert.deepStrictEqual(cert.signatureAlgorithm, { name: "EdDSA", namedCurve: "Ed25519" });
+    assert.deepStrictEqual(cert.signatureAlgorithm, { name: "Ed25519" });
     assert.strictEqual(ok, true);
   });