Golang PKCS7 Padding/Unpadding

pkcs7padding.go

// pkcs7strip remove pkcs7 padding
func pkcs7strip(data []byte, blockSize int) ([]byte, error) {
	length := len(data)
	if length == 0 {
		return nil, errors.New("pkcs7: Data is empty")
	}
	if length%blockSize != 0 {
		return nil, errors.New("pkcs7: Data is not block-aligned")
	}
	padLen := int(data[length-1])
	ref := bytes.Repeat([]byte{byte(padLen)}, padLen)
	if padLen > blockSize || padLen == 0 || !bytes.HasSuffix(data, ref) {
		return nil, errors.New("pkcs7: Invalid padding")
	}
	return data[:length-padLen], nil
}

// pkcs7pad add pkcs7 padding
func pkcs7pad(data []byte, blockSize int) ([]byte, error) {
	if blockSize <= 1 || blockSize >= 256 {
		return nil, fmt.Errorf("pkcs7: Invalid block size %d", blockSize)
	} else {
		padLen := blockSize - len(data) % blockSize
		padding := bytes.Repeat([]byte{byte(padLen)}, padLen)
		return append(data, padding...), nil
	}
}

Yes, I think that should be the case

Yes, I think that should be the case

Thanks, I have updated the gist per your suggestion.