在Windows Phone上进行加密

时间:2015-08-28 08:00:47

标签: c# windows-phone-8 cryptography

我制作了一些代码,允许我在c#中进行加密 - 主要使用System.Security.Cryptography中的AesManaged()SHA256Managed()

用例是该工具需要能够拉出加密的数据,解密,显示给用户,允许再次编辑和加密,然后再将其发回。

我希望能够在Windows Phone上做类似的事情,但似乎手机上没有命名空间。

那么我现在的选择是什么?它是否可以在Windows Phone 10上使用?看起来在手机应用程序中执行加密操作会是一项相对常见的任务吗?

编辑:添加了有关应用应该执行的操作的信息

2 个答案:

答案 0 :(得分:1)

你想用密码学做什么? 因为如果您只需要存储一些用户凭据,最好的方法是使用PasswordVault

MSDN参考https://msdn.microsoft.com/en-us/library/windows/apps/xaml/windows.security.credentials.passwordvault.aspx

我在这里举了一个例子 http://depblog.weblogs.us/2014/11/20/migrating-from-sl8-0-protectdata-to-rt8-1-passwordvault/

添加了一些关于如何在Vault中添加和删除条目的示例代码(有关博客文章的更多详细信息)

public async Task AddAccount(Account accountToAdd)
{
    //Reinitialize the vault to see if the given account is already available
    await this.InitializeSettingsService();
    Account accountFromVault = this.Accounts.FirstOrDefault(item => item.UserName.Equals(accountToAdd.UserName, StringComparison.OrdinalIgnoreCase));

    if(accountFromVault == null)
        _vault.Add(new PasswordCredential(Constants.VAULTRESOURCENAME, accountToAdd.UserName, accountToAdd.Password));

    if (accountFromVault != null && !accountFromVault.Password.Equals(accountToAdd.Password, StringComparison.Ordinal))
    {
        _vault.Remove(new PasswordCredential(Constants.VAULTRESOURCENAME, accountFromVault.UserName, accountFromVault.Password));
        _vault.Add(new PasswordCredential(Constants.VAULTRESOURCENAME, accountToAdd.UserName, accountToAdd.Password));
    }

    Account accountFromMemory = this.Accounts.FirstOrDefault(item => item.UserName.Equals(accountToAdd.UserName, StringComparison.OrdinalIgnoreCase));
    if (accountFromMemory != null)
    {
        if (!accountFromMemory.Password.Equals(accountToAdd.Password, StringComparison.OrdinalIgnoreCase))
        {
            this.Accounts.Remove(accountFromMemory);
            this.Accounts.Add(accountToAdd);
        }
    }
    else
        this.Accounts.Add(accountToAdd);
}

public async Task RemoveAccount(Account accountToRemove)
{
    //Reinitialize the vault to see if the given account is already available
    await this.InitializeSettingsService();
    Account accountFromVault = this.Accounts.FirstOrDefault(item => item.UserName.Equals(accountToRemove.UserName, StringComparison.OrdinalIgnoreCase));

    if (accountFromVault != null)
        _vault.Remove(new PasswordCredential(Constants.VAULTRESOURCENAME, accountToRemove.UserName, accountToRemove.Password));

    Account accountFromMemory = this.Accounts.FirstOrDefault(item => item.UserName.Equals(accountToRemove.UserName, StringComparison.OrdinalIgnoreCase));
    if (accountFromMemory != null)
        this.Accounts.Remove(accountFromMemory);
}

答案 1 :(得分:0)

正如@WDS所指出的,用于加密的工具位于Windows.Security.Cryptography命名空间中 - 可在#WP8上找到。

所以我重写了我的哈希实现:

public IBuffer ComputeHash(string value)
{
    IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(value, BinaryStringEncoding.Utf8);
    var objAlgProv = HashAlgorithmProvider.OpenAlgorithm("SHA256");
    var strAlgNameUsed = objAlgProv.AlgorithmName;

    var buffHash = objAlgProv.HashData(buffUtf8Msg);

    if (buffHash.Length != objAlgProv.HashLength)
    {
        throw new Exception("There was an error creating the hash");
    }

    return buffHash;
}

如何进行加密和解密的示例可以在这里找到:

https://msdn.microsoft.com/en-us/library/windows/apps/windows.security.cryptography.core.cryptographicengine.aspx