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/*
* Copyright (C) 2018 Square, Inc.
*
* 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 okio.samples
import okio.Buffer
import okio.ByteString
import okio.ByteString.Companion.decodeHex
import okio.HashingSink.Companion.sha256
import okio.HashingSource.Companion.sha256
import okio.blackholeSink
import okio.buffer
import okio.source
import java.io.File
import java.io.IOException
class KotlinHashing {
fun run() {
val file = File("../README.md")
println("ByteString")
val byteString = readByteString(file)
println(" md5: " + byteString.md5().hex())
println(" sha1: " + byteString.sha1().hex())
println(" sha256: " + byteString.sha256().hex())
println(" sha512: " + byteString.sha512().hex())
println()
println("Buffer")
val buffer = readBuffer(file)
println(" md5: " + buffer.md5().hex())
println(" sha1: " + buffer.sha1().hex())
println(" sha256: " + buffer.sha256().hex())
println(" sha512: " + buffer.sha512().hex())
println()
println("HashingSource")
sha256(file.source()).use { hashingSource ->
hashingSource.buffer().use { source ->
source.readAll(blackholeSink())
println(" sha256: " + hashingSource.hash.hex())
}
}
println()
println("HashingSink")
sha256(blackholeSink()).use { hashingSink ->
hashingSink.buffer().use { sink ->
file.source().use { source ->
sink.writeAll(source)
sink.close() // Emit anything buffered.
println(" sha256: " + hashingSink.hash.hex())
}
}
}
println()
println("HMAC")
val secret = "7065616e7574627574746572".decodeHex()
println("hmacSha256: " + byteString.hmacSha256(secret).hex())
println()
}
@Throws(IOException::class)
fun readByteString(file: File): ByteString {
return file.source().buffer().use { it.readByteString() }
}
@Throws(IOException::class)
fun readBuffer(file: File): Buffer {
return file.source().use { source ->
Buffer().also { it.writeAll(source) }
}
}
}
fun main() {
KotlinHashing().run()
}
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