Crypto library movement and changes to content helper interfaces

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

pkg/encryption/blockcipher/blockcipher_test.go

@@ -0,0 +1,115 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package blockcipher
+
+import (
+	"bytes"
+	"io"
+	"testing"
+)
+
+func TestBlockCipherHandlerCreate(t *testing.T) {
+	_, err := NewLayerBlockCipherHandler()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestBlockCipherEncryption(t *testing.T) {
+	var (
+		layerData = []byte("this is some data")
+	)
+
+	h, err := NewLayerBlockCipherHandler()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+
+	ciphertextReader, lbco, err := h.Encrypt(layerDataReader, AESSIVCMAC256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ciphertext := make([]byte, 1024)
+	encsize, err := ciphertextReader.Read(ciphertext)
+	if err != nil && err != io.EOF {
+		t.Fatal("Reading the ciphertext should not have failed")
+	}
+	ciphertextTestReader := bytes.NewReader(ciphertext[:encsize])
+
+	// Use a different instantiated object to indicate an invokation at a diff time
+	plaintextReader, _, err := h.Decrypt(ciphertextTestReader, lbco)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintext := make([]byte, 1024)
+	decsize, err := plaintextReader.Read(plaintext)
+	if err != nil && err != io.EOF {
+		t.Fatal("Read the plaintext should not have failed")
+	}
+
+	if string(plaintext[:decsize]) != string(layerData) {
+		t.Fatal("Decrypted data is incorrect")
+	}
+}
+
+func TestBlockCipherEncryptionInvalidKey(t *testing.T) {
+	var (
+		layerData = []byte("this is some data")
+	)
+
+	h, err := NewLayerBlockCipherHandler()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+
+	ciphertextReader, lbco, err := h.Encrypt(layerDataReader, AESSIVCMAC512)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Use a different instantiated object to indicate an invokation at a diff time
+	bc2, err := NewAESSIVLayerBlockCipher(512)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	lbco.SymmetricKey = []byte("aaa3456789012345678901234567890123456789012345678901234567890123")
+
+	ciphertext := make([]byte, 1024)
+	encsize, err := ciphertextReader.Read(ciphertext)
+	if err != nil {
+		t.Fatal(err)
+	}
+	ciphertextTestReader := bytes.NewReader(ciphertext[:encsize])
+
+	plaintextReader, _, err := bc2.Decrypt(ciphertextTestReader, lbco)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintext := make([]byte, 1024)
+	_, err = plaintextReader.Read(plaintext)
+	if err == nil {
+		t.Fatal("Read() should have failed due to wrong key")
+	}
+}