feat: add (rsa)pubKey.encrypt and (rsa)privKey.decrypt

nodeJS only for now

src/keys/rsa-class.js

@@ -30,8 +30,18 @@ class RsaPublicKey {
     })
   }
 
-  encrypt (bytes) {
-    return this._key.encrypt(bytes, 'RSAES-PKCS1-V1_5')
+  encrypt (bytes, cb) {
+    if (cb) {
+      let res
+      try {
+        res = crypto.encrypt(this._key, bytes)
+      } catch(e) {
+        return cb(e)
+      }
+      return cb(null, res)
+    } else {
+      return crypto.encrypt(this._key, bytes)
+    }
   }
 
   equals (key) {
@@ -69,8 +79,18 @@ class RsaPrivateKey {
     return new RsaPublicKey(this._publicKey)
   }
 
-  decrypt (msg, callback) {
-    crypto.decrypt(this._key, msg, callback)
+  decrypt (bytes, cb) {
+    if (cb) {
+      let res
+      try {
+        res = crypto.decrypt(this._key, bytes)
+      } catch(e) {
+        return cb(e)
+      }
+      return cb(null, res)
+    } else {
+      return crypto.decrypt(this._key, bytes)
+    }
   }
 
   marshal () {

src/keys/rsa.js

@@ -77,3 +77,11 @@ exports.hashAndVerify = function (key, sig, msg, callback) {
     callback(null, result)
   })
 }
+
+exports.encrypt = function (key, bytes) {
+  return crypto.publicEncrypt(jwkToPem(key), bytes)
+}
+
+exports.decrypt = function (key, bytes) {
+  return crypto.privateDecrypt(jwkToPem(key), bytes)
+}