eu.europa.ec.eudi.sdjwt.JwtBase64.kt Maven / Gradle / Ivy
/*
* Copyright (c) 2023 European Commission
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package eu.europa.ec.eudi.sdjwt
import java.util.*
import java.util.Base64.Decoder
import java.util.Base64.Encoder
object JwtBase64 {
private val encoder: Encoder = Base64.getUrlEncoder().withoutPadding()
private val decoder: Decoder = Base64.getUrlDecoder()
/**
* Decodes the given [value].
* @param value Expected to be base64 URL-encoded without padding
* @return the decoded content
* @throws IllegalArgumentException in case padding used
*/
fun decode(value: String): ByteArray {
require(value.lastOrNull() != '=') { "No padding" }
return decoder.decode(value)
}
/**
* URL-Encodes the given [value] without padding
* @param value what to encode
* @return the base64 URL-encoded without padding
*/
fun encode(value: ByteArray): String = encoder.encodeToString(value)
}