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DigestDelegate with inline functions (#66)
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164 changes: 164 additions & 0 deletions
164
library/digest/src/commonMain/kotlin/org/kotlincrypto/core/digest/internal/-Buffer.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| /* | ||
| * Copyright (c) 2024 Matthew Nelson | ||
| * | ||
| * 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 | ||
| * | ||
| * https://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. | ||
| **/ | ||
| @file:Suppress("KotlinRedundantDiagnosticSuppress") | ||
|
|
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| package org.kotlincrypto.core.digest.internal | ||
|
|
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| import kotlin.jvm.JvmInline | ||
| import kotlin.jvm.JvmSynthetic | ||
|
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| @JvmInline | ||
| internal value class Buffer private constructor(internal val value: ByteArray) { | ||
|
|
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| internal fun toState( | ||
| algorithm: String, | ||
| digestLength: Int, | ||
| bufOffs: Int, | ||
| compressCount: Long, | ||
| ): DigestState = State( | ||
| algorithm, | ||
| digestLength, | ||
| bufOffs, | ||
| compressCount, | ||
| this, | ||
| ) | ||
|
|
||
| private class State( | ||
| algorithm: String, | ||
| digestLength: Int, | ||
| bufOffs: Int, | ||
| compressCount: Long, | ||
| buf: Buffer, | ||
| ): DigestState( | ||
| algorithm, | ||
| digestLength, | ||
| bufOffs, | ||
| compressCount, | ||
| ) { | ||
| val buf = Buffer(buf.value.copyOf()) | ||
| } | ||
|
|
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| internal companion object { | ||
|
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| @JvmSynthetic | ||
| internal fun DigestState.buf(): Buffer = Buffer((this as State).buf.value.copyOf()) | ||
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| @JvmSynthetic | ||
| @Throws(IllegalArgumentException::class) | ||
| internal fun initialize( | ||
| algorithm: String, | ||
| blockSize: Int, | ||
| digestLength: Int, | ||
| ): Buffer { | ||
| require(algorithm.isNotBlank()) { "algorithm cannot be blank" } | ||
| require(blockSize > 0) { "blockSize must be greater than 0" } | ||
| require(blockSize % 8 == 0) { "blockSize must be a factor of 8" } | ||
| require(digestLength >= 0) { "digestLength cannot be negative" } | ||
| return Buffer(ByteArray(blockSize)) | ||
| } | ||
| } | ||
| } | ||
|
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| @Suppress("NOTHING_TO_INLINE") | ||
| internal inline fun Buffer.update( | ||
| input: Byte, | ||
| bufOffsGetAndIncrement: () -> Int, | ||
| bufOffsReset: () -> Unit, | ||
| compress: (buf: ByteArray, offset: Int) -> Unit, | ||
| compressCountIncrement: () -> Unit, | ||
| ) { | ||
| val bufOffs = bufOffsGetAndIncrement() | ||
| value[bufOffs] = input | ||
|
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| // value.size == blockSize | ||
| if ((bufOffs + 1) != value.size) return | ||
| compress(value, 0) | ||
| compressCountIncrement() | ||
| bufOffsReset() | ||
| } | ||
|
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| @Suppress("NOTHING_TO_INLINE") | ||
| internal inline fun Buffer.update( | ||
| input: ByteArray, | ||
| offset: Int, | ||
| len: Int, | ||
| bufOffsGet: () -> Int, | ||
| bufOffsGetAndIncrement: () -> Int, | ||
| bufOffsReset: () -> Unit, | ||
| compress: (buf: ByteArray, offset: Int) -> Unit, | ||
| compressCountIncrement: () -> Unit, | ||
| ) { | ||
| var i = offset | ||
| var remaining = len | ||
|
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| // Fill buffer if not already empty | ||
| while (bufOffsGet() != 0 && remaining > 0) { | ||
| update( | ||
| input[i++], | ||
| bufOffsGetAndIncrement, | ||
| bufOffsReset, | ||
| compress, | ||
| compressCountIncrement, | ||
| ) | ||
| --remaining | ||
| } | ||
|
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| // Chunk | ||
| while (remaining >= value.size) { | ||
| compress(input, i) | ||
| i += value.size | ||
| remaining -= value.size | ||
| compressCountIncrement() | ||
| } | ||
|
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| // Add remaining to buffer | ||
| while (remaining-- > 0) { | ||
| update( | ||
| input[i++], | ||
| bufOffsGetAndIncrement, | ||
| bufOffsReset, | ||
| compress, | ||
| compressCountIncrement, | ||
| ) | ||
| } | ||
| } | ||
|
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| @Suppress("NOTHING_TO_INLINE") | ||
| internal inline fun Buffer.digest( | ||
| bufOffs: Int, | ||
| compressCount: Long, | ||
| digest: (bitLength: Long, offs: Int, buf: ByteArray) -> ByteArray, | ||
| resetBufOffs: () -> Unit, | ||
| resetCompressCount: () -> Unit, | ||
| resetDigest: () -> Unit, | ||
| ): ByteArray { | ||
| val bitLength = ((compressCount * value.size) + bufOffs) * 8 | ||
| val final = digest(bitLength, bufOffs, value) | ||
| reset(resetBufOffs, resetCompressCount, resetDigest) | ||
| return final | ||
| } | ||
|
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| @Suppress("NOTHING_TO_INLINE") | ||
| internal inline fun Buffer.reset( | ||
| resetBufOffs: () -> Unit, | ||
| resetCompressCount: () -> Unit, | ||
| resetDigest: () -> Unit, | ||
| ) { | ||
| value.fill(0) | ||
| resetBufOffs() | ||
| resetCompressCount() | ||
| resetDigest() | ||
| } |
140 changes: 0 additions & 140 deletions
140
library/digest/src/commonMain/kotlin/org/kotlincrypto/core/digest/internal/DigestDelegate.kt
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