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Problem: no keyring interface for e2ee to store arbitrary payload (#1413
) changelo add age encrypt/decrypt in unit test Update x/e2ee/keyring/keyring.go Signed-off-by: yihuang <huang@crypto.com> fix lint
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,202 @@ | ||
package keyring | ||
|
||
import ( | ||
"bufio" | ||
"fmt" | ||
"io" | ||
"os" | ||
"path/filepath" | ||
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"github.com/99designs/keyring" | ||
"golang.org/x/crypto/bcrypt" | ||
|
||
errorsmod "cosmossdk.io/errors" | ||
"github.com/cosmos/cosmos-sdk/client/input" | ||
sdkkeyring "github.com/cosmos/cosmos-sdk/crypto/keyring" | ||
) | ||
|
||
const ( | ||
keyringFileDirName = "e2ee-keyring-file" | ||
keyringTestDirName = "e2ee-keyring-test" | ||
passKeyringPrefix = "e2ee-keyring-%s" //nolint: gosec | ||
maxPassphraseEntryAttempts = 3 | ||
) | ||
|
||
type Keyring interface { | ||
Get(string) ([]byte, error) | ||
Set(string, []byte) error | ||
} | ||
|
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func New( | ||
appName, backend, rootDir string, userInput io.Reader, | ||
) (Keyring, error) { | ||
var ( | ||
db keyring.Keyring | ||
err error | ||
) | ||
serviceName := appName + "-e2ee" | ||
switch backend { | ||
case sdkkeyring.BackendMemory: | ||
return newKeystore(keyring.NewArrayKeyring(nil), sdkkeyring.BackendMemory), nil | ||
case sdkkeyring.BackendTest: | ||
db, err = keyring.Open(keyring.Config{ | ||
AllowedBackends: []keyring.BackendType{keyring.FileBackend}, | ||
ServiceName: serviceName, | ||
FileDir: filepath.Join(rootDir, keyringTestDirName), | ||
FilePasswordFunc: func(_ string) (string, error) { | ||
return "test", nil | ||
}, | ||
}) | ||
case sdkkeyring.BackendFile: | ||
fileDir := filepath.Join(rootDir, keyringFileDirName) | ||
db, err = keyring.Open(keyring.Config{ | ||
AllowedBackends: []keyring.BackendType{keyring.FileBackend}, | ||
ServiceName: serviceName, | ||
FileDir: fileDir, | ||
FilePasswordFunc: newRealPrompt(fileDir, userInput), | ||
}) | ||
case sdkkeyring.BackendOS: | ||
db, err = keyring.Open(keyring.Config{ | ||
ServiceName: serviceName, | ||
FileDir: rootDir, | ||
KeychainTrustApplication: true, | ||
FilePasswordFunc: newRealPrompt(rootDir, userInput), | ||
}) | ||
case sdkkeyring.BackendKWallet: | ||
db, err = keyring.Open(keyring.Config{ | ||
AllowedBackends: []keyring.BackendType{keyring.KWalletBackend}, | ||
ServiceName: "kdewallet", | ||
KWalletAppID: serviceName, | ||
KWalletFolder: "", | ||
}) | ||
case sdkkeyring.BackendPass: | ||
prefix := fmt.Sprintf(passKeyringPrefix, serviceName) | ||
db, err = keyring.Open(keyring.Config{ | ||
AllowedBackends: []keyring.BackendType{keyring.PassBackend}, | ||
ServiceName: serviceName, | ||
PassPrefix: prefix, | ||
}) | ||
default: | ||
return nil, errorsmod.Wrap(sdkkeyring.ErrUnknownBacked, backend) | ||
} | ||
|
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if err != nil { | ||
return nil, err | ||
} | ||
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return newKeystore(db, backend), nil | ||
} | ||
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var _ Keyring = keystore{} | ||
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type keystore struct { | ||
db keyring.Keyring | ||
backend string | ||
} | ||
|
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func newKeystore(kr keyring.Keyring, backend string) keystore { | ||
return keystore{ | ||
db: kr, | ||
backend: backend, | ||
} | ||
} | ||
|
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func (ks keystore) Get(name string) ([]byte, error) { | ||
item, err := ks.db.Get(name) | ||
if err != nil { | ||
return nil, err | ||
} | ||
|
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return item.Data, nil | ||
} | ||
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func (ks keystore) Set(name string, secret []byte) error { | ||
return ks.db.Set(keyring.Item{ | ||
Key: name, | ||
Data: secret, | ||
Label: name, | ||
}) | ||
} | ||
|
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func newRealPrompt(dir string, buf io.Reader) func(string) (string, error) { | ||
return func(prompt string) (string, error) { | ||
keyhashStored := false | ||
keyhashFilePath := filepath.Join(dir, "keyhash") | ||
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var keyhash []byte | ||
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_, err := os.Stat(keyhashFilePath) | ||
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switch { | ||
case err == nil: | ||
keyhash, err = os.ReadFile(keyhashFilePath) | ||
if err != nil { | ||
return "", errorsmod.Wrap(err, fmt.Sprintf("failed to read %s", keyhashFilePath)) | ||
} | ||
|
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keyhashStored = true | ||
|
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case os.IsNotExist(err): | ||
keyhashStored = false | ||
|
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default: | ||
return "", errorsmod.Wrap(err, fmt.Sprintf("failed to open %s", keyhashFilePath)) | ||
} | ||
|
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failureCounter := 0 | ||
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for { | ||
failureCounter++ | ||
if failureCounter > maxPassphraseEntryAttempts { | ||
return "", sdkkeyring.ErrMaxPassPhraseAttempts | ||
} | ||
|
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buf := bufio.NewReader(buf) | ||
pass, err := input.GetPassword(fmt.Sprintf("Enter keyring passphrase (attempt %d/%d):", failureCounter, maxPassphraseEntryAttempts), buf) | ||
if err != nil { | ||
// NOTE: LGTM.io reports a false positive alert that states we are printing the password, | ||
// but we only log the error. | ||
// | ||
// lgtm [go/clear-text-logging] | ||
fmt.Fprintln(os.Stderr, err) | ||
continue | ||
} | ||
|
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if keyhashStored { | ||
if err := bcrypt.CompareHashAndPassword(keyhash, []byte(pass)); err != nil { | ||
fmt.Fprintln(os.Stderr, "incorrect passphrase") | ||
continue | ||
} | ||
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return pass, nil | ||
} | ||
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reEnteredPass, err := input.GetPassword("Re-enter keyring passphrase:", buf) | ||
if err != nil { | ||
// NOTE: LGTM.io reports a false positive alert that states we are printing the password, | ||
// but we only log the error. | ||
// | ||
// lgtm [go/clear-text-logging] | ||
fmt.Fprintln(os.Stderr, err) | ||
continue | ||
} | ||
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if pass != reEnteredPass { | ||
fmt.Fprintln(os.Stderr, "passphrase do not match") | ||
continue | ||
} | ||
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passwordHash, err := bcrypt.GenerateFromPassword([]byte(pass), 2) | ||
if err != nil { | ||
fmt.Fprintln(os.Stderr, err) | ||
continue | ||
} | ||
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if err := os.WriteFile(keyhashFilePath, passwordHash, 0o600); err != nil { | ||
return "", err | ||
} | ||
|
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return pass, nil | ||
} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
package keyring | ||
|
||
import ( | ||
"bytes" | ||
"io" | ||
"testing" | ||
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"filippo.io/age" | ||
"github.com/test-go/testify/require" | ||
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"github.com/cosmos/cosmos-sdk/crypto/keyring" | ||
) | ||
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func TestKeyring(t *testing.T) { | ||
kr, err := New("cronosd", keyring.BackendTest, t.TempDir(), nil) | ||
require.NoError(t, err) | ||
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identity, err := age.GenerateX25519Identity() | ||
require.NoError(t, err) | ||
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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() | ||
} | ||
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require.NoError(t, kr.Set("test", []byte(identity.String()))) | ||
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secret, err := kr.Get("test") | ||
require.NoError(t, err) | ||
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identity, err = age.ParseX25519Identity(string(secret)) | ||
require.NoError(t, err) | ||
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{ | ||
reader, err := age.Decrypt(bytes.NewReader(ciphertext), identity) | ||
require.NoError(t, err) | ||
bz, err := io.ReadAll(reader) | ||
require.NoError(t, err) | ||
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require.Equal(t, []byte("test"), bz) | ||
} | ||
} |