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feat: added encryption/decryption mechanism
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package credentials | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/hex" | ||
|
|
||
| "github.com/charmbracelet/log" | ||
|
|
||
| "github.com/google/tink/go/aead" | ||
| "github.com/google/tink/go/insecurecleartextkeyset" | ||
| "github.com/google/tink/go/keyset" | ||
| ) | ||
|
|
||
| // Generate a AES256GCM keyset handle. | ||
| func GenerateKey() string { | ||
| kh, err := keyset.NewHandle(aead.AES256GCMKeyTemplate()) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
|
|
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| // Create a writer to store the keyset | ||
| buf := new(bytes.Buffer) | ||
| writer := keyset.NewBinaryWriter(buf) | ||
|
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| err = insecurecleartextkeyset.Write(kh, writer) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| // Encode the serialized keyset from the buffer to a base64 string | ||
| base64EncodedKey := hex.EncodeToString(buf.Bytes()) | ||
|
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| log.Info("Key succesfully generated") | ||
| return base64EncodedKey | ||
| } | ||
|
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| func parseEncodedKeyset(encodedKeyset string) *keyset.Handle{ | ||
| encodedKeysetBytes, err := hex.DecodeString(encodedKeyset) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| reader := keyset.NewBinaryReader(bytes.NewReader(encodedKeysetBytes)) | ||
| kh, err := insecurecleartextkeyset.Read(reader) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| return kh | ||
| } | ||
|
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| // Encrypt data | ||
| func Encrypt(encodedKeyset string, data []byte) ([]byte, error) { | ||
| kh := parseEncodedKeyset(encodedKeyset) | ||
| a, err := aead.New(kh) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| return a.Encrypt(data, nil) | ||
| } | ||
|
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| func Decrypt(encodedKeyset string, ciphertext []byte) ([]byte, error) { | ||
| kh := parseEncodedKeyset(encodedKeyset) | ||
| a, err := aead.New(kh) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| return a.Decrypt(ciphertext, nil) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package credentials | ||
|
|
||
| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| "testing" | ||
| ) | ||
|
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||
| func TestKeyGeneration_assertKeyReturned(t *testing.T) { | ||
| keyset := GenerateKey() | ||
|
|
||
| assert.True(t, len(keyset) > 10) | ||
| } | ||
|
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| func TestEncryption(t *testing.T) { | ||
| keyset := GenerateKey() | ||
| cleartext := make([]byte, 128) | ||
|
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| // Encrypt data | ||
| ciphertext, err := Encrypt(keyset, cleartext) | ||
| if err != nil { | ||
| assert.FailNow(t, "unable to encrypt data: "+err.Error()) | ||
| } | ||
|
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| assert.NotNil(t, ciphertext) | ||
|
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| // Decrypt data | ||
| decryptedData, err := Decrypt(keyset, ciphertext) | ||
| if err != nil { | ||
| assert.FailNow(t, "unable to decrypt data: "+err.Error()) | ||
| } | ||
|
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| assert.Equal(t, cleartext, decryptedData) | ||
| } |