Add privatri wco

wco/crypto/crypto.js

@@ -58,4 +58,53 @@ apx.crypto.decryptMessage = async (encryptedMessage, privateKey) => {
     );
 };
 
+apx.crypto.sign = async (message, privateKey) => {
+    privateKey = await openpgp.readPrivateKey(
+        {
+            armoredKey: privateKey
+        }
+    );
+
+    return await openpgp.sign(
+        {
+            message: await openpgp.createMessage(
+                {
+                    text: message
+                }
+            ),
+            signingKeys: privateKey
+        }
+    );
+};
+
+apx.crypto.verifySignature = async (message, signature, publicKey) => {
+    publicKey = await openpgp.readKey(
+        {
+            armoredKey: publicKey
+        }
+    );
+
+    const verified = await openpgp.verify(
+        {
+            message: await openpgp.createMessage(
+                {
+                    text: message
+                }
+            ),
+            signature: await openpgp.readSignature(
+                {
+                    armoredSignature: signature
+                }
+            ),
+            verificationKeys: publicKey
+        }
+    );
+
+    if (await verified.signatures[0].verified) {
+        return true;
+    } else {
+        return false;
+    };
+};
+
 export default apx;