android - 获取每个提供商和服务的所有加密算法
问题描述
我的名字是 Panagiotis,我想与您分享我遇到的问题的解决方案。
我的问题:
最近,我为我的应用程序创建了一个 android 库,实现了一些关于密码学的标准功能。我的主要问题是我可以使用什么样的转换来加密和解密我的数据。我的第一步是在互联网上寻找信息,但我没有找到适合我的东西。我想要一个包含所有正确转换名称的列表。
下面你会看到我的解决方案!
帕纳焦蒂斯·万杰拉托斯
解决方案
我在 Kotlin 中的解决方案:
首先,我创建了“AlgorithmsPerProviderAndService”类,其中包含服务名称和每个提供者的所有可用算法。
private class AlgorithmsPerProviderAndService constructor(private val serviceName: String)
{
private val ServiceName: String get() = serviceName
val ProviderName: HashMap<String, ArrayList<String>> = HashMap()
}
我创建了以下代码部分,以获取 android 使用的每个服务和提供程序的所有可用算法。
// StringBuilder object to display the data
val sb = StringBuilder()
// "Info" HashMap that will has as key the name of the service and as value my custom class
// that will hold the algorithm's names per provider
val info: HashMap<String, AlgorithmsPerProviderAndService> = HashMap()
// Part of code that reads all the available providers and for each provider get the
// corresponding services and the algorithm's names
Security.getProviders().toList().sortedBy { it.name }.forEach {
it.services.sortedBy { it1 -> it1.type }.forEach {it1 ->
// Check if the "info" HashMap is empty and if is empty then add the first service
// and the corresponding FIRST provider and FIRST algorithm
if (info.size == 0)
{
val currentData = AlgorithmsPerProviderAndService(it1.type)
currentData.ProviderName.put(it.name, arrayListOf(it1.algorithm))
info.put(it1.type, currentData)
}
// If the "info" HashMap is not empty, then check if the current service already exists.
// The reason that I check if the current services exists is because I want to have
// each service only one time into the "info" HashMap
else
{
// Because the current service may have been implemented by more than one provider
// and because I want to have the all algorithms that have been implemented by all
// provides, in case of the current service already exists, I check if the current
// provider exists or not.
if (info.containsKey(it1.type))
{
// If the provider exists, I want to add only the available algorithms for the
// current provider
if (info[it1.type]!!.ProviderName.containsKey(it.name))
{
info[it1.type]!!.ProviderName[it.name]!!.add(it1.algorithm)
}
// If the provider does not exist, then I want to add both the new provider and
// only the FIRST algorithm (because the other algorithms will be add when the
// above condition is true)
else
{
info[it1.type]!!.ProviderName.put(it.name, arrayListOf(it1.algorithm))
}
}
// If this case, the current service does not exists, so adding it and in addition
// I am adding provider (of the current service) and only the first algorithm.
else
{
val currentData = AlgorithmsPerProviderAndService(it1.type)
currentData.ProviderName.put(it.name, arrayListOf(it1.algorithm))
info.put(it1.type, currentData)
}
}
}
}
// Display data
info.toSortedMap().forEach {
sb.appendln("Service: " + it.key)
it.value.ProviderName.toSortedMap().forEach {it1 ->
sb.appendln("\tProvider: " + it1.key)
it1.value.sort()
it1.value.forEach {it2 ->
sb.appendln("\t\tAlgorithm: $it2")
}
sb.appendln()
}
sb.appendln()
}
我希望写出可以理解的评论!如果有人想讨论代码,我会很高兴,我正在等待您的意见和优化!
万杰拉托斯·帕纳吉奥蒂斯
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