dorkbox.bytes.HashExtensions.kt Maven / Gradle / Ivy

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Byte manipulation and Unsigned Number Utilities

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/*
 * Copyright 2021 dorkbox, llc
 *
 * 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 dorkbox.bytes

import java.security.MessageDigest
import java.security.NoSuchAlgorithmException


object Hash {
    /**
     * Gets the version number.
     */
    const val version = BytesInfo.version

    init {
        // Add this project to the updates system, which verifies this class + UUID + version information
        dorkbox.updates.Updates.add(Hash::class.java, "f176cecea06e48e1a96d59c08a6e98c3", BytesInfo.version)
    }

    internal val digest1 = ThreadLocal.withInitial {
        try {
            return@withInitial MessageDigest.getInstance("SHA1")
        } catch (e: NoSuchAlgorithmException) {
            throw RuntimeException("Unable to initialize hash algorithm. SHA1 digest doesn't exist?!? (This should not happen")
        }
    }

    internal val digest256 = ThreadLocal.withInitial {
        try {
            return@withInitial MessageDigest.getInstance("SHA-256")
        } catch (e: NoSuchAlgorithmException) {
            throw RuntimeException("Unable to initialize hash algorithm. SHA256 digest doesn't exist?!? (This should not happen")
        }
    }

    val sha1 get() = digest1.get()
    val sha256 get() = digest256.get()
}


fun ByteArray.sha1(): ByteArray {
    val digest: MessageDigest = Hash.digest1.get()

    digest.reset()
    digest.update(this)
    return digest.digest()
}

fun ByteArray.sha256(): ByteArray {
    val digest: MessageDigest = Hash.digest256.get()

    digest.reset()
    digest.update(this)
    return digest.digest()
}