1 files changed, 234 insertions, 0 deletions
diff --git a/blockcipher/blockcipher_aes_ctr_test.go b/blockcipher/blockcipher_aes_ctr_test.go
new file mode 100644
index 0000000..0e19eeb
--- /dev/null
+++ b/blockcipher/blockcipher_aes_ctr_test.go
@@ -0,0 +1,234 @@
+/*
+   Copyright The ocicrypt 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"
+	_ "crypto/sha256"
+	"io"
+	"testing"
+)
+
+func TestBlockCipherAesCtrCreateValid(t *testing.T) {
+	_, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestBlockCipherAesCtrCreateInvalid(t *testing.T) {
+	_, err := NewAESCTRLayerBlockCipher(8)
+	if err == nil {
+		t.Fatal("Test should have failed due to invalid cipher size")
+	}
+	_, err = NewAESCTRLayerBlockCipher(255)
+	if err == nil {
+		t.Fatal("Test should have failed due to invalid cipher size")
+	}
+}
+
+func TestBlockCipherAesCtrEncryption(t *testing.T) {
+	var (
+		symKey = []byte("01234567890123456789012345678912")
+		opt    = LayerBlockCipherOptions{
+			Private: PrivateLayerBlockCipherOptions{
+				SymmetricKey: symKey,
+			},
+		}
+		layerData = []byte("this is some data")
+	)
+
+	bc, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+	ciphertextReader, finalizer, err := bc.Encrypt(layerDataReader, opt)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Use a different instantiated object to indicate an invocation at a diff time
+	bc2, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ciphertext := make([]byte, 1024)
+	encsize, err := ciphertextReader.Read(ciphertext)
+	if err != io.EOF {
+		t.Fatal("Expected EOF")
+	}
+
+	ciphertextTestReader := bytes.NewReader(ciphertext[:encsize])
+
+	lbco, err := finalizer()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintextReader, _, err := bc2.Decrypt(ciphertextTestReader, lbco)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintext := make([]byte, 1024)
+	size, err := plaintextReader.Read(plaintext)
+	if err != io.EOF {
+		t.Fatal("Expected EOF")
+	}
+
+	if string(plaintext[:size]) != string(layerData) {
+		t.Fatalf("expected %q, got %q", layerData, plaintext[:size])
+	}
+}
+
+func TestBlockCipherAesCtrEncryptionInvalidKey(t *testing.T) {
+	var (
+		symKey = []byte("01234567890123456789012345678912")
+		opt    = LayerBlockCipherOptions{
+			Private: PrivateLayerBlockCipherOptions{
+				SymmetricKey: symKey,
+			},
+		}
+		layerData = []byte("this is some data")
+	)
+
+	bc, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+
+	ciphertextReader, finalizer, err := bc.Encrypt(layerDataReader, opt)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Use a different instantiated object to indicate an invokation at a diff time
+	bc2, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ciphertext := make([]byte, 1024)
+	encsize, err := ciphertextReader.Read(ciphertext)
+	if err != io.EOF {
+		t.Fatal("Expected EOF")
+	}
+	ciphertextTestReader := bytes.NewReader(ciphertext[:encsize])
+
+	lbco, err := finalizer()
+	if err != nil {
+		t.Fatal(err)
+	}
+	lbco.Private.SymmetricKey = []byte("aaa34567890123456789012345678912")
+
+	plaintextReader, _, err := bc2.Decrypt(ciphertextTestReader, lbco)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintext := make([]byte, 1024)
+	// first time read may not hit EOF of original source
+	_, _ = plaintextReader.Read(plaintext)
+	// now we must have hit eof and evaluated the plaintext
+	_, err = plaintextReader.Read(plaintext)
+	if err == nil {
+		t.Fatal("Read() should have failed due to wrong key")
+	}
+}
+
+func TestBlockCipherAesCtrEncryptionInvalidKeyLength(t *testing.T) {
+	var (
+		symKey = []byte("012345")
+		opt    = LayerBlockCipherOptions{
+			Private: PrivateLayerBlockCipherOptions{
+				SymmetricKey: symKey,
+			},
+		}
+		layerData = []byte("this is some data")
+	)
+
+	bc, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+	_, _, err = bc.Encrypt(layerDataReader, opt)
+	if err == nil {
+		t.Fatal("Test should have failed due to invalid key length")
+	}
+}
+
+func TestBlockCipherAesCtrEncryptionInvalidHMAC(t *testing.T) {
+	var (
+		symKey = []byte("01234567890123456789012345678912")
+		opt    = LayerBlockCipherOptions{
+			Private: PrivateLayerBlockCipherOptions{
+				SymmetricKey: symKey,
+			},
+		}
+		layerData = []byte("this is some data")
+	)
+
+	bc, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	layerDataReader := bytes.NewReader(layerData)
+
+	ciphertextReader, finalizer, err := bc.Encrypt(layerDataReader, opt)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Use a different instantiated object to indicate an invokation at a diff time
+	bc2, err := NewAESCTRLayerBlockCipher(256)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ciphertext := make([]byte, 1024)
+	encsize, err := ciphertextReader.Read(ciphertext)
+	if err != io.EOF {
+		t.Fatal("Expected EOF")
+	}
+	ciphertextTestReader := bytes.NewReader(ciphertext[:encsize])
+
+	lbco, err := finalizer()
+	if err != nil {
+		t.Fatal(err)
+	}
+	lbco.Public.Hmac = []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0}
+
+	plaintextReader, _, err := bc2.Decrypt(ciphertextTestReader, lbco)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	plaintext := make([]byte, 1024)
+	// we will hit the error the first time
+	_, err = plaintextReader.Read(plaintext)
+	if err == nil || err == io.EOF {
+		t.Fatal("Read() should have failed due to Invalid HMAC verification")
+	}
+}