英文:
Dotnet Core - How to dispose of RNGCryptoServiceProvider()
问题
我收到了警告：
严重性 Code 描述 项目 文件 行 抑制状态
警告 CA2000 在所有引用超出范围之前调用System.IDisposable.Dispose对由'new RNGCryptoServiceProvider()'创建的对象。 JobsLedger.AUTHORISATION C:\Users\simon\OneDrive\Documents\1.0 - AURELIA\1.0 - JobsLedgerSPA -ASPNET CORE 3.1\JobsLedger.AUTHORISATION\CryptoService.cs 96 活动
触发此警告的代码位于以下行：
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
它的用法如下：
public string EncryptdatabaseName(string text)
{
byte[] salt;
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
using var aesAlg = Aes.Create();
using var encryptor = aesAlg.CreateEncryptor(salt, aesAlg.IV);
using var msEncrypt = new MemoryStream();
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(text);
}
var iv = aesAlg.IV;
var decryptedContent = msEncrypt.ToArray();
var encryptedDatabaseName = new byte[iv.Length + decryptedContent.Length];
Buffer.BlockCopy(iv, 0, encryptedDatabaseName, 0, iv.Length);
Buffer.BlockCopy(decryptedContent, 0, encryptedDatabaseName, iv.Length, decryptedContent.Length);
// 使用额外信息格式化哈希
return string.Format(CultureInfo.CurrentCulture, "$DATABASENAME$V1using var aesAlg = Aes.Create();
using var encryptor = aesAlg.CreateEncryptor(salt, aesAlg.IV);
using var msEncrypt = new MemoryStream();
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(text);
}
var iv = aesAlg.IV;
var decryptedContent = msEncrypt.ToArray();
var encryptedDatabaseName = new byte[iv.Length + decryptedContent.Length];
Buffer.BlockCopy(iv, 0, encryptedDatabaseName, 0, iv.Length);
Buffer.BlockCopy(decryptedContent, 0, encryptedDatabaseName, iv.Length, decryptedContent.Length);
// 使用额外信息格式化哈希
return string.Format(CultureInfo.CurrentCulture, "$DATABASENAME$V1${0}${1}", Convert.ToBase64String(encryptedDatabaseName), salt);
", Convert.ToBase64String(encryptedDatabaseName), salt);
}
我正在使用Visual Studio 2019，是Roslyn编译器引发了这个警告。我想要摆脱这个警告。
如何处置这个问题？
英文:
I am getting the warning:
Severity Code Description Project File Line Suppression State
Warning CA2000 Call System.IDisposable.Dispose on object created by 'new RNGCryptoServiceProvider()' before all references to it are out of scope. JobsLedger.AUTHORISATION C:\Users\simon\OneDrive\Documents.0 - AURELIA.0 - JobsLedgerSPA -ASPNET CORE 3.1\JobsLedger.AUTHORISATION\CryptoService.cs 96 Active
The code this warning is occuring is on this line:
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
Its used as follows:
public string EncryptdatabaseName(string text)
{
byte[] salt;
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
using var aesAlg = Aes.Create();
using var encryptor = aesAlg.CreateEncryptor(salt, aesAlg.IV);
using var msEncrypt = new MemoryStream();
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(text);
}
var iv = aesAlg.IV;
var decryptedContent = msEncrypt.ToArray();
var encryptedDatabaseName = new byte[iv.Length + decryptedContent.Length];
Buffer.BlockCopy(iv, 0, encryptedDatabaseName, 0, iv.Length);
Buffer.BlockCopy(decryptedContent, 0, encryptedDatabaseName, iv.Length, decryptedContent.Length);
// Format hash with extra information
return string.Format(CultureInfo.CurrentCulture, "$DATABASENAME$V1public string EncryptdatabaseName(string text)
{
byte[] salt;
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
using var aesAlg = Aes.Create();
using var encryptor = aesAlg.CreateEncryptor(salt, aesAlg.IV);
using var msEncrypt = new MemoryStream();
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(text);
}
var iv = aesAlg.IV;
var decryptedContent = msEncrypt.ToArray();
var encryptedDatabaseName = new byte[iv.Length + decryptedContent.Length];
Buffer.BlockCopy(iv, 0, encryptedDatabaseName, 0, iv.Length);
Buffer.BlockCopy(decryptedContent, 0, encryptedDatabaseName, iv.Length, decryptedContent.Length);
// Format hash with extra information
return string.Format(CultureInfo.CurrentCulture, "$DATABASENAME$V1${0}${1}", Convert.ToBase64String(encryptedDatabaseName), salt);
}
", Convert.ToBase64String(encryptedDatabaseName), salt);
}
I am using Visual Studio 2019 and its the Roslyn compiler that is throwing this up.. I want to get rid of the warning..
How do I dispose of this?
答案1
得分: 2
The CA2000 means “Dispose objects before losing scope”. From official document, you could try this code:
使用(RNGCryptoServiceProvider test = new RNGCryptoServiceProvider())
{
test.GetBytes(salt = new byte[SaltSize]);
}
如果你想直接抑制它，你可以使用这段代码，类似于:
#pragma warning disable CA1062
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
#pragma warning restore CA1062
英文:
The CA2000 means “Dispose objects before losing scope”. From official document, you could try this code:
using(RNGCryptoServiceProvider test = new RNGCryptoServiceProvider())
{
test.GetBytes(salt = new byte[SaltSize]);
}
If you want to suppress it directly, you could use this code, which is like:
#pragma warning disable CA1062
new RNGCryptoServiceProvider().GetBytes(salt = new byte[SaltSize]);
#pragma warning restore CA1062
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