Restructured MAC/cookie calculation

Added copy-right headers accidentally removed

1 files changed, 96 insertions, 0 deletions

diff --git a/src/xchacha20_test.go b/src/xchacha20_test.go
new file mode 100644
index 0000000..0f41cf8
--- /dev/null
+++ b/src/xchacha20_test.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"encoding/hex"
+	"testing"
+)
+
+type XChaCha20Test struct {
+	Nonce string
+	Key   string
+	PT    string
+	CT    string
+}
+
+func TestXChaCha20(t *testing.T) {
+
+	tests := []XChaCha20Test{
+		{
+			Nonce: "000000000000000000000000000000000000000000000000",
+			Key:   "0000000000000000000000000000000000000000000000000000000000000000",
+			PT:    "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+			CT:    "789e9689e5208d7fd9e1f3c5b5341f48ef18a13e418998addadd97a3693a987f8e82ecd5c1433bfed1af49750c0f1ff29c4174a05b119aa3a9e8333812e0c0feb1299c5949d895ee01dbf50f8395dd84",
+		},
+		{
+			Nonce: "0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f",
+			Key:   "0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f",
+			PT:    "0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f",
+			CT:    "e1a046aa7f71e2af8b80b6408b2fd8d3a350278cde79c94d9efaa475e1339b3dd490127b",
+		},
+		{
+			Nonce: "d9a8213e8a697508805c2c171ad54487ead9e3e02d82d5bc",
+			Key:   "979196dbd78526f2f584f7534db3f5824d8ccfa858ca7e09bdd3656ecd36033c",
+			PT:    "43cc6d624e451bbed952c3e071dc6c03392ce11eb14316a94b2fdc98b22fedea",
+			CT:    "53c1e8bef2dbb8f2505ec010a7afe21d5a8e6dd8f987e4ea1a2ed5dfbc844ea400db34496fd2153526c6e87c36694200",
+		},
+	}
+
+	for _, test := range tests {
+
+		nonce, err := hex.DecodeString(test.Nonce)
+		if err != nil {
+			panic(err)
+		}
+
+		key, err := hex.DecodeString(test.Key)
+		if err != nil {
+			panic(err)
+		}
+
+		pt, err := hex.DecodeString(test.PT)
+		if err != nil {
+			panic(err)
+		}
+
+		func() {
+			var nonceArray [24]byte
+			var keyArray [32]byte
+			copy(nonceArray[:], nonce)
+			copy(keyArray[:], key)
+
+			// test encryption
+
+			ct := XChaCha20Poly1305Encrypt(
+				nil,
+				&nonceArray,
+				pt,
+				nil,
+				&keyArray,
+			)
+			ctHex := hex.EncodeToString(ct)
+			if ctHex != test.CT {
+				t.Fatal("encryption failed, expected:", test.CT, "got", ctHex)
+			}
+
+			// test decryption
+
+			ptp, err := XChaCha20Poly1305Decrypt(
+				nil,
+				&nonceArray,
+				ct,
+				nil,
+				&keyArray,
+			)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			ptHex := hex.EncodeToString(ptp)
+			if ptHex != test.PT {
+				t.Fatal("decryption failed, expected:", test.PT, "got", ptHex)
+			}
+		}()
+
+	}
+
+}