39 lines
1.1 KiB
Kotlin
39 lines
1.1 KiB
Kotlin
// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package sop.util
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class HexUtil {
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companion object {
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/**
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* Encode a byte array to a hex string.
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*
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* @param bytes bytes
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* @return hex encoding
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* @see
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* [Convert Byte Arrays to Hex Strings in Kotlin](https://www.baeldung.com/kotlin/byte-arrays-to-hex-strings)
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*/
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@JvmStatic fun bytesToHex(bytes: ByteArray): String = bytes.toHex()
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/**
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* Decode a hex string into a byte array.
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*
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* @param s hex string
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* @return decoded byte array
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* @see
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* [Kotlin convert hex string to ByteArray](https://stackoverflow.com/a/66614516/11150851)
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*/
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@JvmStatic fun hexToBytes(s: String): ByteArray = s.decodeHex()
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}
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}
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fun String.decodeHex(): ByteArray {
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check(length % 2 == 0) { "Hex encoding must have even number of digits." }
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return chunked(2).map { it.toInt(16).toByte() }.toByteArray()
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}
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fun ByteArray.toHex(): String = joinToString(separator = "") { eachByte -> "%02X".format(eachByte) }
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