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

nodeJS only for now

src/keys/rsa-class.js

@@ -31,8 +31,8 @@ class RsaPublicKey {
     })
   }
 
-  encrypt (bytes) {
+  async encrypt (bytes) {
-    return this._key.encrypt(bytes, 'RSAES-PKCS1-V1_5')
+    return crypto.encrypt(this._key, bytes)
   }
 
   equals (key) {
@@ -68,6 +68,10 @@ class RsaPrivateKey {
     return new RsaPublicKey(this._publicKey)
   }
 
+  async decrypt (bytes) {
+    return crypto.decrypt(this._key, bytes)
+  }
+
   marshal () {
     return crypto.utils.jwkToPkcs1(this._key)
   }

src/keys/rsa.js

@@ -68,3 +68,11 @@ exports.hashAndVerify = async function (key, sig, msg) { // eslint-disable-line
   const pem = jwkToPem(key)
   return verify.verify(pem, sig)
 }
+
+exports.encrypt = async function (key, bytes) {
+  return crypto.publicEncrypt(jwkToPem(key), bytes)
+}
+
+exports.decrypt = async function (key, bytes) {
+  return crypto.privateDecrypt(jwkToPem(key), bytes)
+}

test/keys/rsa.spec.js

@@ -80,6 +80,13 @@ describe('RSA', function () {
     expect(valid).to.be.eql(true)
   })
 
+  it('encrypt and decrypt', async () => {
+    const data = Buffer.from('hello world')
+    const enc = await key.public.encrypt(data)
+    const dec = await key.decrypt(enc)
+    expect(dec).to.be.eql(data)
+  })
+
   it('fails to verify for different data', async () => {
     const data = Buffer.from('hello world')
     const sig = await key.sign(data)