Enable creating did:jwk from key array

Author: cicnavi

src/Did/DidJwkResolver.php

@@ -51,4 +51,20 @@ public function extractJwkFromDidJwk(string $didJwk): array
             throw new DidException('Error processing did:jwk: ' . $exception->getMessage(), 0, $exception);
         }
     }
+
+
+    /**
+     * Generate a did:jwk value from a JWK array.
+     *
+     * @param mixed[] $jwk The JWK representation of the key
+     * @return string The did:jwk value (e.g., did:jwk:eyJrdHkiOiJPS1AiLCJjcnYiOiJFZDI1NTE5IiwidXNlIjoic2lnIiwieCI6IjExLU9fSjZfSzhfbXUyXzVfSzhfbXUyXzVfSzhfbXUyXzUifQ)
+     * @throws \JsonException If the JWK cannot be encoded to JSON
+     */
+    public function generateDidJwkFromJwk(array $jwk): string
+    {
+        $jsonJwk = $this->helpers->json()->encode($jwk);
+        $encodedJwk = $this->helpers->base64Url()->encode($jsonJwk);
+
+        return 'did:jwk:' . $encodedJwk;
+    }
 }

tests/src/Did/DidJwkResolverTest.php

@@ -68,4 +68,19 @@ public function testExtractJwkFromDidJwkThrowsExceptionOnInvalidJson(): void
         // 'abc' in base64url is 'YWJj'
         $this->resolver->extractJwkFromDidJwk('did:jwk:YWJj');
     }
+
+
+    public function testGenerateDidJwkFromJwkSucceeds(): void
+    {
+        $jwk = [
+            'kty' => 'OKP',
+            'crv' => 'Ed25519',
+            'x' => '11-O_J6_K8_mu2_5_K8_mu2_5_K8_mu2_5',
+        ];
+        // phpcs:ignore
+        $expectedDidJwk = 'did:jwk:eyJrdHkiOiJPS1AiLCJjcnYiOiJFZDI1NTE5IiwieCI6IjExLU9fSjZfSzhfbXUyXzVfSzhfbXUyXzVfSzhfbXUyXzUifQ';
+
+        $didJwk = $this->resolver->generateDidJwkFromJwk($jwk);
+        $this->assertSame($expectedDidJwk, $didJwk);
+    }
 }