Added a binding for Encrypt() with private key

Author: dsuponitskiy-duality

src/include/docstrings/cryptocontext_docs.h

@@ -306,17 +306,28 @@ const char* cc_EvalAtIndexKeyGen_docs = R"pbdoc(
     :return: None
 )pbdoc";
 
-const char* cc_Encrypt_docs = R"doc(
+const char* cc_EncryptPubkey_docs = R"doc(
     Encrypt a plaintext using a given public key
 
     :param plaintext: plaintext
-    :type plaintext: Plaintext
+    :type plaintext: ConstPlaintext
     :param publicKey: public key
     :type publicKey: PublicKey
     :return: ciphertext (or null on failure)
     :rtype: Ciphertext
 )doc";
 
+const char* cc_EncryptPrivkey_docs = R"doc(
+    Encrypt a plaintext using a given private key
+
+    :param plaintext: plaintext
+    :type plaintext: ConstPlaintext
+    :param privateKey: private key
+    :type privateKey: PrivateKey
+    :return: ciphertext (or null on failure)
+    :rtype: Ciphertext
+)doc";
+
 const char* cc_Decrypt_docs = R"pbdoc(
 Decrypt a single ciphertext into the appropriate plaintext
 

src/lib/bindings.cpp

@@ -613,7 +613,12 @@ void bind_crypto_context(py::module &m) {
             py::overload_cast<const PublicKey<DCRTPoly>&, ConstPlaintext&>(&CryptoContextImpl<DCRTPoly>::Encrypt, py::const_),
             py::arg("publicKey"),
             py::arg("plaintext"),
-            py::doc(cc_Encrypt_docs))
+            py::doc(cc_EncryptPubkey_docs))
+       .def("Encrypt",
+            py::overload_cast<const PrivateKey<DCRTPoly>&, ConstPlaintext&>(&CryptoContextImpl<DCRTPoly>::Encrypt, py::const_),
+            py::arg("privateKey"),
+            py::arg("plaintext"),
+            py::doc(cc_EncryptPrivkey_docs))
         .def("Decrypt",
             [](CryptoContext<DCRTPoly>& self, const PrivateKey<DCRTPoly> privKey, ConstCiphertext<DCRTPoly> ct) {
                 Plaintext result;