将私有RSACryptoServiceProvider blob导入CNGKey.Import [英] Import a private RSACryptoServiceProvider blob into CNGKey.Import
问题描述
从旧版程序中
再见[] rsaPrivateKeyExport = RSACryptoProvider.ExportCspBlob(true);
bye[] rsaPrivateKeyExport = RSACryptoProvider.ExportCspBlob(true);
这些密钥存储在文件中。
These keys are stored in a file.
作为旧版刷新的一部分,我需要使用CNG RSA密钥。
As part of a legacy refresh, I need to use CNG RSA keys.
类似于读取旧的blob然后进行转换:
So something like reading the old blob and then converting:
CngKey cngPrv = CngKey.Import(rsaPrvKeyExport,
CngKeyBlobFormat.GenericPrivateBlob);
CngKey cngPrv = CngKey.Import(rsaPrvKeyExport, CngKeyBlobFormat.GenericPrivateBlob);
但是我无法使它正常工作吗?
But I cannot get this to work?
如何将旧的Blob类型转换为新的Blob类型?我只使用旧的Blob的一部分吗?
How do I convert the old blob type to the new one? Do I only use parts of the old blob?
密钥长度为2048。
推荐答案
GenericPrivateBlob
是CNG特定的格式,并不意味着尝试任何私人物品。
GenericPrivateBlob
is a CNG-specific format, it doesn't mean "try any private thing".
CNG能够使用 https://docs.microsoft.com/zh-cn/windows/desktop/api/Bcrypt/nf-bcrypt-bcryptexportkey 。
private static readonly CngKeyBlobFormat s_legacyRsaPrivateBlobFormat =
new CngKeyBlobFormat("CAPIPRIVATEBLOB");
...
byte[] exported;
using (RSACryptoServiceProvider a = new RSACryptoServiceProvider(2048))
{
exported = a.ExportCspBlob(true);
}
RSA b;
using (CngKey key = CngKey.Import(exported, s_legacyRsaPrivateBlob))
{
b = new RSACng(key);
}
// This using is broken out here just to show that the constructed object can safely outlive
// the CngKey object that it was created from.
using (b)
{
...
}
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