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package plaintext
import (
"github.com/go-crypt/crypt/internal/encoding"
)
// NewVariant converts an identifier string to a plaintext.Variant.
func NewVariant(identifier string) (variant Variant) {
switch identifier {
case AlgIdentifierPlainText:
return VariantPlainText
case AlgIdentifierBase64:
return VariantBase64
default:
return VariantNone
}
}
// Variant is a variant of the plaintext.Digest.
type Variant int
const (
// VariantNone is a variant of the plaintext.Digest which is unknown.
VariantNone Variant = iota
// VariantPlainText is a variant of the plaintext.Digest which stores the key as plain text.
VariantPlainText
// VariantBase64 is a variant of the plaintext.Digest which stores the key as a base64 string.
VariantBase64
)
// Prefix returns the plaintext.Variant prefix identifier.
func (v Variant) Prefix() (prefix string) {
switch v {
case VariantPlainText:
return AlgIdentifierPlainText
case VariantBase64:
return AlgIdentifierBase64
default:
return
}
}
// Decode performs the decode operation for this plaintext.Variant.
func (v Variant) Decode(src string) (dst []byte, err error) {
switch v {
case VariantBase64:
return encoding.Base64RawAdaptedEncoding.DecodeString(src)
default:
return []byte(src), nil
}
}
// Encode performs the encode operation for this plaintext.Variant.
func (v Variant) Encode(src []byte) (dst string) {
switch v {
case VariantBase64:
return encoding.Base64RawAdaptedEncoding.EncodeToString(src)
default:
return string(src)
}
}
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