/
Iana.kt
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/
Iana.kt
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/*
* Copyright (C) 2022 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 okhttp3.survey
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.coroutines.executeAsync
import okhttp3.survey.types.SuiteId
import okio.ByteString.Companion.decodeHex
import okio.IOException
/** Example: "0x00,0x08",TLS_RSA_EXPORT_WITH_DES40_CBC_SHA,Y,N,[RFC4346] */
val IANA_CSV_PATTERN = "\"0x(\\w\\w),0x(\\w\\w)\",(\\w+).*".toRegex()
fun parseIanaCsvRow(s: String): SuiteId? {
if (s.contains("Reserved") || s.contains("Unassigned")) return null
val matcher = IANA_CSV_PATTERN.matchEntire(s) ?: return null
val id = (matcher.groupValues[1] + matcher.groupValues[2]).decodeHex()
return SuiteId(id, matcher.groupValues[3])
}
class IanaSuites(
val name: String,
val suites: List<SuiteId>,
) {
fun fromJavaName(javaName: String): SuiteId {
return suites.firstOrNull {
it.name == javaName || it.name == "TLS_${javaName.drop(4)}"
} ?: throw IllegalArgumentException("No such suite: $javaName")
}
}
suspend fun fetchIanaSuites(okHttpClient: OkHttpClient): IanaSuites {
val url = "https://www.iana.org/assignments/tls-parameters/tls-parameters-4.csv"
val call = okHttpClient.newCall(Request(url.toHttpUrl()))
val suites =
call.executeAsync().use {
if (!it.isSuccessful) {
throw IOException("Failed ${it.code} ${it.message}")
}
it.body.string().lines()
.mapNotNull { parseIanaCsvRow(it) }
}
return IanaSuites("current", suites)
}