600 lines
24 KiB
Kotlin
600 lines
24 KiB
Kotlin
/*
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* Copyright 2023 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.bytes
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import net.jpountz.xxhash.StreamingXXHash32
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import net.jpountz.xxhash.StreamingXXHash64
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import net.jpountz.xxhash.XXHashFactory
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import java.io.File
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import java.io.InputStream
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import java.security.MessageDigest
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import java.security.NoSuchAlgorithmException
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object Hash {
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/**
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* Gets the version number.
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*/
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const val version = BytesInfo.version
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object MessageDigestAlgorithm {
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@Deprecated("Do not use this, it is insecure and prone to attack!")
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const val MD2 = "MD2"
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const val MD5 = "MD5"
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const val SHA_1 = "SHA-1"
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const val SHA_224 = "SHA-224"
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const val SHA_256 = "SHA-256"
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const val SHA_384 = "SHA-384"
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@Deprecated("Do not use this, it is vulnerable to ht-extension attacks")
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const val SHA_512 = "SHA-512"
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const val SHA_512_224 = "SHA-512/224"
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const val SHA_512_256 = "SHA-512/256"
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const val SHA3_224 = "SHA3-224"
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const val SHA3_256 = "SHA3-256"
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const val SHA3_384 = "SHA3-384"
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const val SHA3_512 = "SHA3-512"
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}
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@Deprecated("Do not use this, it is insecure and prone to attack!")
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internal val digestMd5: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.MD5)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. MD5 digest doesn't exist?!?")
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}
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}
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}
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internal val digest1: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA_1)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA1 digest doesn't exist?!?")
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}
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}
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}
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internal val digest256: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA_256)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA256 digest doesn't exist?!?")
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}
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}
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}
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internal val digest384: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA_384)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA384 digest doesn't exist?!?")
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}
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}
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}
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internal val digest512: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA_512_256)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA512 digest doesn't exist?!?")
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}
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}
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}
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internal val digest3_256: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA3_256)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA3-256 digest doesn't exist?!?")
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}
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}
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}
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internal val digest3_384: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA3_384)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA3-384 digest doesn't exist?!?")
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}
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}
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}
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internal val digest3_512: ThreadLocal<MessageDigest> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial MessageDigest.getInstance(MessageDigestAlgorithm.SHA3_512)
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize hash algorithm. SHA3-512 digest doesn't exist?!?")
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}
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}
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}
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internal val xxHashFactory: ThreadLocal<XXHashFactory> by lazy {
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ThreadLocal.withInitial {
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try {
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return@withInitial XXHashFactory.fastestInstance()
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} catch (e: NoSuchAlgorithmException) {
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throw RuntimeException("Unable to initialize xxHash algorithm. xxHash doesn't exist?!?")
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}
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}
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}
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@Deprecated("Do not use this, it is insecure and prone to attack!")
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val md5 get() = digest1.get()
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val sha1 get() = digest1.get()
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val sha256 get() = digest256.get()
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val sha384 get() = digest384.get()
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val sha512 get() = digest512.get()
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val sha3_256 get() = digest3_256.get()
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val sha3_384 get() = digest3_384.get()
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val sha3_512 get() = digest3_512.get()
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}
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/**
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* Reads an InputStream and updates the digest for the data
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*/
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private fun updateDigest(digest: MessageDigest, data: InputStream, bufferSize: Int, start: Long, length: Long) {
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val skipped = data.skip(start)
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if (skipped != start) {
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throw IllegalArgumentException("Unable to skip $start bytes. Only able to skip $skipped bytes instead")
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}
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var readLength = length
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val adjustedBufferSize = if (bufferSize > readLength) {
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readLength.toInt()
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} else {
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bufferSize
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}
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val buffer = ByteArray(adjustedBufferSize)
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var read = 1
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while (read > 0 && readLength > 0) {
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read = if (adjustedBufferSize > readLength) {
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data.read(buffer, 0, readLength.toInt())
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} else {
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data.read(buffer, 0, adjustedBufferSize)
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}
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digest.update(buffer, 0, read)
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readLength -= read
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}
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}
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/**
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* Reads an InputStream and updates the digest for the data
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*/
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private fun updateDigest32(hash32: StreamingXXHash32, data: InputStream, bufferSize: Int, start: Long, length: Long) {
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val skipped = data.skip(start)
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if (skipped != start) {
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throw IllegalArgumentException("Unable to skip $start bytes. Only able to skip $skipped bytes instead")
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}
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var readLength = length
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val adjustedBufferSize = if (bufferSize > readLength) {
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readLength.toInt()
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} else {
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bufferSize
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}
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val buffer = ByteArray(adjustedBufferSize)
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var read = 1
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while (read > 0 && readLength > 0) {
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read = if (adjustedBufferSize > readLength) {
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data.read(buffer, 0, readLength.toInt())
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} else {
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data.read(buffer, 0, adjustedBufferSize)
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}
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hash32.update(buffer, 0, read)
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readLength -= read
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}
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}
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private fun updateDigest64(hash64: StreamingXXHash64, data: InputStream, bufferSize: Int, start: Long, length: Long) {
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val skipped = data.skip(start)
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if (skipped != start) {
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throw IllegalArgumentException("Unable to skip $start bytes. Only able to skip $skipped bytes instead")
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}
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var readLength = length
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val adjustedBufferSize = if (bufferSize > readLength) {
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readLength.toInt()
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} else {
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bufferSize
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}
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val buffer = ByteArray(adjustedBufferSize)
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var read = 1
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while (read > 0 && readLength > 0) {
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read = if (adjustedBufferSize > readLength) {
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data.read(buffer, 0, readLength.toInt())
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} else {
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data.read(buffer, 0, adjustedBufferSize)
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}
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hash64.update(buffer, 0, read)
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readLength -= read
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}
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}
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private fun hash(byteArray: ByteArray, start: Int, length: Int, digest: MessageDigest): ByteArray {
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digest.reset()
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digest.update(byteArray, start, length)
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return digest.digest()
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}
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@Deprecated("Do not use this, it is insecure and prone to attack!")
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fun ByteArray.md5(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digestMd5.get())
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fun ByteArray.sha1(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest1.get())
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fun ByteArray.sha256(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest256.get())
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fun ByteArray.sha384(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest384.get())
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fun ByteArray.sha512(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest512.get())
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fun ByteArray.sha3_256(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest3_256.get())
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fun ByteArray.sha3_384(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest3_384.get())
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fun ByteArray.sha3_512(start: Int = 0, length: Int = this.size): ByteArray = hash(this, start, length, Hash.digest3_512.get())
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/**
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun ByteArray.xxHash32(seed: Int = -0x31bf6a3c, start: Int = 0, length: Int = this.size): Int {
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val xxHash = Hash.xxHashFactory.get()
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val hash32 = xxHash.newStreamingHash32(seed)!!
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hash32.update(this, start, length)
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return hash32.value
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}
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/**
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun ByteArray.xxHash64(seed: Long = -0x31bf6a3c, start: Int = 0, length: Int = this.size): Long {
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val xxHash = Hash.xxHashFactory.get()
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val hash64 = xxHash.newStreamingHash64(seed)!!
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hash64.update(this, start, length)
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return hash64.value
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}
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private fun hash(string: String, start: Int, length: Int, digest: MessageDigest): ByteArray {
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val charToBytes = string.toCharArray().toBytes16(start, length)
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digest.reset()
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digest.update(charToBytes, 0, charToBytes.size)
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return digest.digest()
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}
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/**
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* gets the MD5 hash of the specified string, as UTF-16
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*/
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@Deprecated("Do not use this, it is insecure and prone to attack!")
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fun String.md5(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digestMd5.get())
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/**
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* gets the SHA1 hash of the specified string, as UTF-16
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*/
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fun String.sha1(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest1.get())
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/**
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* gets the SHA256 hash of the specified string, as UTF-16
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*/
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fun String.sha256(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest256.get())
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/**
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* gets the SHA384 hash of the specified string, as UTF-16
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*/
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fun String.sha384(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest384.get())
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/**
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* gets the SHA512 hash of the specified string, as UTF-16
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*/
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fun String.sha512(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest512.get())
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/**
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* gets the SHA3_256 hash of the specified string, as UTF-16
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*/
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fun String.sha3_256(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest3_256.get())
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/**
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* gets the SHA3_384 hash of the specified string, as UTF-16
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*/
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fun String.sha3_384(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest3_384.get())
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/**
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* gets the SHA3_512 hash of the specified string, as UTF-16
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*/
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fun String.sha3_512(start: Int = 0, length: Int = this.length): ByteArray = hash(this, start, length, Hash.digest3_512.get())
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/**
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* gets the xxHash32 of the string, as UTF-16
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*
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun String.xxHash32(seed: Int = -0x31bf6a3c, start: Int = 0, length: Int = this.length): Int {
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val xxHash = Hash.xxHashFactory.get()
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val hash32 = xxHash.newStreamingHash32(seed)!!
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val charToBytes = this.toCharArray().toBytes16(start, length)
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hash32.update(charToBytes, 0, charToBytes.size)
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return hash32.value
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}
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/**
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* gets the xxHash64 of the string, as UTF-16
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*
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun String.xxHash64(seed: Long = -0x31bf6a3c, start: Int = 0, length: Int = this.length): Long {
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val xxHash = Hash.xxHashFactory.get()
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val hash64 = xxHash.newStreamingHash64(seed)!!
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val charToBytes = this.toCharArray().toBytes16(start, length)
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hash64.update(charToBytes, 0, charToBytes.size)
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return hash64.value
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}
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/**
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* gets the hash + SALT of the string, as UTF-16
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*
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* LENGTH is specifically the length of what we want to hash of the orig string (it doesn't include the salt)
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*/
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private fun hashWithSalt(string: String, saltBytes: ByteArray, start: Int, length: Int, digest: MessageDigest): ByteArray {
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val charToBytes = string.toCharArray().toBytes16(start, length)
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val withSalt = charToBytes + saltBytes
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digest.reset()
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digest.update(withSalt, 0, withSalt.size)
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return digest.digest()
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}
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/**
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* gets the SHA256 hash + SALT of the string, as UTF-16
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*/
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fun String.sha1WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest1.get())
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/**
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* gets the SHA256 hash + SALT of the string, as UTF-16
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*/
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fun String.sha256WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest256.get())
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/**
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* gets the SHA384 hash + SALT of the string, as UTF-16
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*/
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fun String.sha384WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest384.get())
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/**
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* gets the SHA512 hash + SALT of the string, as UTF-16
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*/
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fun String.sha512WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest512.get())
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/**
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* gets the SHA3_256 hash + SALT of the string, as UTF-16
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*/
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fun String.sha3_256WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest3_256.get())
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/**
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* gets the SHA3_384 hash + SALT of the string, as UTF-16
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*/
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fun String.sha3_384WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest3_384.get())
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/**
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* gets the SHA3_512 hash + SALT of the string, as UTF-16
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*/
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fun String.sha3_512WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.length + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest3_512.get())
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/**
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* gets the xxHash32 + SALT of the string, as UTF-16
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*
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun String.xxHash32WithSalt(saltBytes: ByteArray, seed: Int = -0x31bf6a3c, start: Int = 0, length: Int = this.length + saltBytes.size): Int {
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require(start >= 0) { "Start ($start) must be >= 0" }
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require(length >= 0) { "Length ($length) must be >= 0" }
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require(start < length) { "Start ($start) position must be smaller than the size of the String" }
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val xxHash = Hash.xxHashFactory.get()
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val hash32 = xxHash.newStreamingHash32(seed)!!
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val charToBytes = this.toCharArray().toBytes16(start, length)
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hash32.update(charToBytes, 0, charToBytes.size)
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hash32.update(saltBytes, 0, saltBytes.size)
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return hash32.value
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}
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/**
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* gets the xxHash64 + SALT of the string, as UTF-16
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*
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* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
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*/
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fun String.xxHash64WithSalt(saltBytes: ByteArray, seed: Long = -0x31bf6a3c, start: Int = 0, length: Int = this.length + saltBytes.size): Long {
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require(start >= 0) { "Start ($start) must be >= 0" }
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require(length >= 0) { "Length ($length) must be >= 0" }
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require(start < length) { "Start ($start) position must be smaller than the size of the String" }
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val xxHash = Hash.xxHashFactory.get()
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val hash64 = xxHash.newStreamingHash64(seed)!!
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val charToBytes = this.toCharArray().toBytes16(start, length)
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hash64.update(charToBytes, 0, charToBytes.size)
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hash64.update(saltBytes, 0, saltBytes.size)
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return hash64.value
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}
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private fun hashWithSalt(bytes: ByteArray, saltBytes: ByteArray, start: Int, length: Int, digest: MessageDigest): ByteArray {
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require(start >= 0) { "Start ($start) must be >= 0" }
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require(length >= 0) { "Length ($length) must be >= 0" }
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require(start < bytes.size) { "Start ($start) position must be smaller than the size of the byte array" }
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digest.reset()
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digest.update(bytes, 0, bytes.size)
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digest.update(saltBytes, 0, saltBytes.size)
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return digest.digest()
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}
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/**
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* gets the SHA1 hash + SALT of the byte array
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*/
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fun ByteArray.sha1WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
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hashWithSalt(this, saltBytes, start, length, Hash.digest1.get())
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/**
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* gets the SHA256 hash + SALT of the byte array
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*/
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|
fun ByteArray.sha256WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest256.get())
|
|
/**
|
|
* gets the SHA384 hash + SALT of the byte array
|
|
*/
|
|
fun ByteArray.sha384WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest384.get())
|
|
/**
|
|
* gets the SHA512 hash + SALT of the byte array
|
|
*/
|
|
fun ByteArray.sha512WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest512.get())
|
|
/**
|
|
* gets the SHA3_256 hash + SALT of the byte array
|
|
*/
|
|
fun ByteArray.sha3_256WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest3_256.get())
|
|
/**
|
|
* gets the SHA3_384 hash + SALT of the byte array
|
|
*/
|
|
fun ByteArray.sha3_384WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest3_384.get())
|
|
/**
|
|
* gets the SHA3_512 hash + SALT of the byte array
|
|
*/
|
|
fun ByteArray.sha3_512WithSalt(saltBytes: ByteArray, start: Int = 0, length: Int = this.size + saltBytes.size): ByteArray =
|
|
hashWithSalt(this, saltBytes, start, length, Hash.digest3_512.get())
|
|
/**
|
|
* gets the xxHash32 + SALT of the byte array
|
|
*
|
|
* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
|
|
*/
|
|
fun ByteArray.xxHash32WithSalt(saltBytes: ByteArray, seed: Int = -0x31bf6a3c, start: Int = 0, length: Int = this.size + saltBytes.size): Int {
|
|
val xxHash = Hash.xxHashFactory.get()
|
|
val hash32 = xxHash.newStreamingHash32(seed)!!
|
|
|
|
hash32.update(this, start, length)
|
|
hash32.update(saltBytes, 0, saltBytes.size)
|
|
return hash32.value
|
|
}
|
|
/**
|
|
* gets the xxHash64 + SALT of the byte array
|
|
*
|
|
* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
|
|
*/
|
|
fun ByteArray.xxHash64WithSalt(saltBytes: ByteArray, seed: Long = -0x31bf6a3c, start: Int = 0, length: Int = this.size + saltBytes.size): Long {
|
|
val xxHash = Hash.xxHashFactory.get()
|
|
val hash64 = xxHash.newStreamingHash64(seed)!!
|
|
|
|
hash64.update(this, start, length)
|
|
hash64.update(saltBytes, 0, saltBytes.size)
|
|
return hash64.value
|
|
}
|
|
|
|
|
|
|
|
|
|
private fun hash(file: File, start: Long, length: Long, bufferSize: Int, digest: MessageDigest): ByteArray {
|
|
require(file.isFile) { "Unable open as file: ${file.absolutePath}" }
|
|
require(file.canRead()) { "Unable to read file: ${file.absolutePath}" }
|
|
|
|
require(start >= 0) { "Start ($start) must be >= 0" }
|
|
require(length >= 0) { "Length ($length) must be >= 0" }
|
|
require(start < file.length()) { "Start ($start) position must be smaller than the size of the file" }
|
|
|
|
file.inputStream().use {
|
|
digest.reset()
|
|
updateDigest(digest, it, bufferSize, start, length)
|
|
return digest.digest()
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* gets the SHA1 hash of the file
|
|
*/
|
|
fun File.sha1(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest1.get())
|
|
/**
|
|
* gets the SHA256 hash of the file
|
|
*/
|
|
fun File.sha256(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest256.get())
|
|
/**
|
|
* gets the SHA384 hash of the file
|
|
*/
|
|
fun File.sha384(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest384.get())
|
|
/**
|
|
* gets the SHA512 hash of the file
|
|
*/
|
|
fun File.sha512(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest512.get())
|
|
/**
|
|
* gets the SHA3_256 hash of the file
|
|
*/
|
|
fun File.sha3_256(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest3_256.get())
|
|
/**
|
|
* gets the SHA3_384 hash of the file
|
|
*/
|
|
fun File.sha3_384(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest3_384.get())
|
|
/**
|
|
* gets the SHA3_512 hash of the file
|
|
*/
|
|
fun File.sha3_512(start: Int = 0, length: Long = this.length(), bufferSize: Int = 4096): ByteArray =
|
|
hash(this, start.toLong(), length, bufferSize, Hash.digest3_512.get())
|
|
|
|
/**
|
|
* Return the xxhash32 of the file as or IllegalArgumentExceptions if there are problems with the file
|
|
*
|
|
* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
|
|
*/
|
|
fun File.xxHash32(start: Long = 0L, length: Long = this.length(), bufferSize: Int = 4096, seed: Int = -0x31bf6a3c): Int {
|
|
val xxHash = Hash.xxHashFactory.get()
|
|
val hash32 = xxHash.newStreamingHash32(seed)!!
|
|
|
|
require(this.isFile) { "Unable open as file: ${this.absolutePath}" }
|
|
require(this.canRead()) { "Unable to read file: ${this.absolutePath}" }
|
|
|
|
require(start >= 0) { "Start ($start) must be >= 0" }
|
|
require(length >= 0) { "Length ($length) must be >= 0" }
|
|
require(start < length()) { "Start ($start) position must be smaller than the size of the file" }
|
|
|
|
this.inputStream().use {
|
|
updateDigest32(hash32, it, bufferSize, start, length)
|
|
return hash32.value
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the xxhash64 of the file as or IllegalArgumentExceptions if there are problems with the file
|
|
*
|
|
* @param seed used to initialize the hash value (for the xxhash seed), use whatever value you want, but always the same
|
|
*/
|
|
fun File.xxHash64(start: Long = 0L, length: Long = this.length(), bufferSize: Int = 4096, seed: Long = -0x31bf6a3c): Long {
|
|
val xxHash = Hash.xxHashFactory.get()
|
|
val hash64 = xxHash.newStreamingHash64(seed)!!
|
|
|
|
require(this.isFile) { "Unable open as file: ${this.absolutePath}" }
|
|
require(this.canRead()) { "Unable to read file: ${this.absolutePath}" }
|
|
|
|
require(start >= 0) { "Start ($start) must be >= 0" }
|
|
require(length >= 0) { "Length ($length) must be >= 0" }
|
|
require(start < length()) { "Start ($start) position must be smaller than the size of the file" }
|
|
|
|
this.inputStream().use {
|
|
updateDigest64(hash64, it, bufferSize, start, length)
|
|
return hash64.value
|
|
}
|
|
}
|