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transcrypt.go

Browse Source 
- Add documentation
- Add tests

Signed-off-by: Jan Tytgat <jan.tytgat@corelayer.eu>
This commit is contained in:
Jan Tytgat
2025-01-13 16:48:08 +01:00
parent 229400421a
commit 125953366b
2 changed files with 205 additions and 39 deletions
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78
pkg/transcrypt/transcrypt.go
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@ -12,6 +12,45 @@ import (
"github.com/minio/sio"
)
// Decrypt decrypts a supplied hex-encoded data string using the supplied secret key.
// It will return an error if either the key or the data is empty.
// If the hex-encoded string data cannot be converted into proper encrypted data, decryption will also fail with an error.
func Decrypt(key string, data string) (any, error) {
if key == "" {
return nil, errors.New("key is empty")
}
if data == "" {
return nil, errors.New("data is empty")
}
var err error
var encryptedData []byte
var kind reflect.Kind
var cryptoConfig sio.Config
if encryptedData, kind, cryptoConfig, err = decodeHexString(key, data); err != nil {
return nil, err
}
var decryptedHexData *bytes.Buffer
decryptedHexData = bytes.NewBuffer(make([]byte, 0))
if _, err = sio.Decrypt(decryptedHexData, bytes.NewBuffer(encryptedData), cryptoConfig); err != nil {
return nil, fmt.Errorf("decrypt failed: %w", err)
}
var decryptedData []byte
if decryptedData, err = hex.DecodeString(string(decryptedHexData.Bytes())); err != nil {
return nil, fmt.Errorf("decode decrypted hex data failed: %w", err)
}
var outputValue reflect.Value
if outputValue, err = convertBytesToValue(decryptedData, kind); err != nil {
return nil, err
}
return outputValue.Interface(), nil
}
// Encrypt encrypts the supplied data using the supplied secret key and cipher suite.
// It will return an error if either the key is empty or the data is nil.
// Additionally, if the necessary cryptographic configuration cannot be created using the supplied cipherSuite, it will return an error.
@ -63,42 +102,3 @@ func Encrypt(key string, salt []byte, cipherSuite CipherSuite, d any) (string, e
return encryptedString, nil
}
// Decrypt decrypts a supplied hex-encoded data string using the supplied secret key.
// It will return an error if either the key or the data is empty.
// If the hex-encoded string data cannot be converted into proper encrypted data, decryption will also fail with an error.
func Decrypt(key string, data string) (any, error) {
if key == "" {
return nil, errors.New("key is empty")
}
if data == "" {
return nil, errors.New("data is empty")
}
var err error
var encryptedData []byte
var kind reflect.Kind
var cryptoConfig sio.Config
if encryptedData, kind, cryptoConfig, err = decodeHexString(key, data); err != nil {
return nil, err
}
var decryptedHexData *bytes.Buffer
decryptedHexData = bytes.NewBuffer(make([]byte, 0))
if _, err = sio.Decrypt(decryptedHexData, bytes.NewBuffer(encryptedData), cryptoConfig); err != nil {
return nil, fmt.Errorf("decrypt failed: %w", err)
}
var decryptedData []byte
if decryptedData, err = hex.DecodeString(string(decryptedHexData.Bytes())); err != nil {
return nil, fmt.Errorf("decode decrypted hex data failed: %w", err)
}
var outputValue reflect.Value
if outputValue, err = convertBytesToValue(decryptedData, kind); err != nil {
return nil, err
}
return outputValue.Interface(), nil
}