add age encrypt/decrypt in unit test

go.mod

@@ -17,6 +17,7 @@ require (
 	cosmossdk.io/x/evidence v0.1.0
 	cosmossdk.io/x/feegrant v0.1.0
 	cosmossdk.io/x/upgrade v0.1.1
+	filippo.io/age v1.1.1
 	github.com/99designs/keyring v1.2.2
 	github.com/cometbft/cometbft v0.38.7-0.20240412124004-1f67e396cf45
 	github.com/cosmos/cosmos-db v1.0.3-0.20240408151834-e75f6e4b28d8

go.sum

@@ -211,6 +211,8 @@ cosmossdk.io/x/feegrant v0.1.0/go.mod h1:4r+FsViJRpcZif/yhTn+E0E6OFfg4n0Lx+6cCtn
 cosmossdk.io/x/upgrade v0.1.1 h1:aoPe2gNvH+Gwt/Pgq3dOxxQVU3j5P6Xf+DaUJTDZATc=
 cosmossdk.io/x/upgrade v0.1.1/go.mod h1:MNLptLPcIFK9CWt7Ra//8WUZAxweyRDNcbs5nkOcQy0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+filippo.io/age v1.1.1 h1:pIpO7l151hCnQ4BdyBujnGP2YlUo0uj6sAVNHGBvXHg=
+filippo.io/age v1.1.1/go.mod h1:l03SrzDUrBkdBx8+IILdnn2KZysqQdbEBUQ4p3sqEQE=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
 github.com/99designs/go-keychain v0.0.0-20191008050251-8e49817e8af4 h1:/vQbFIOMbk2FiG/kXiLl8BRyzTWDw7gX/Hz7Dd5eDMs=

x/e2ee/keyring/keyring_test.go

@@ -1,19 +1,47 @@
 package keyring
 
 import (
+	"bytes"
+	"io"
 	"testing"
 
-	"github.com/cosmos/cosmos-sdk/crypto/keyring"
+	"filippo.io/age"
 	"github.com/test-go/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/crypto/keyring"
 )
 
 func TestKeyring(t *testing.T) {
 	kr, err := New("cronosd", keyring.BackendTest, t.TempDir(), nil)
 	require.NoError(t, err)
 
-	require.NoError(t, kr.Set("test", []byte("test")))
+	identity, err := age.GenerateX25519Identity()
+	require.NoError(t, err)
+
+	var ciphertext []byte
+	{
+		dst := bytes.NewBuffer(nil)
+		writer, err := age.Encrypt(dst, identity.Recipient())
+		require.NoError(t, err)
+		writer.Write([]byte("test"))
+		writer.Close()
+		ciphertext = dst.Bytes()
+	}
+
+	require.NoError(t, kr.Set("test", []byte(identity.String())))
 
 	secret, err := kr.Get("test")
 	require.NoError(t, err)
-	require.Equal(t, []byte("test"), secret)
+
+	identity, err = age.ParseX25519Identity(string(secret))
+	require.NoError(t, err)
+
+	{
+		reader, err := age.Decrypt(bytes.NewReader(ciphertext), identity)
+		require.NoError(t, err)
+		bz, err := io.ReadAll(reader)
+		require.NoError(t, err)
+
+		require.Equal(t, []byte("test"), bz)
+	}
 }