验证完整性 Ceritifcate { RSACryptoServiceProvider - SHA1 - 指纹 }

发布于 2024-07-25 10:09:00 字数 985 浏览 5 评论 0原文

我有一个小问题。 我想验证证书的完整性。

所以我做了这段代码:

using System.Security.Cryptography;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates; 

SHA1Managed sha1 = new SHA1Managed();
RSACryptoServiceProvider csp = null;
AsymmetricAlgorithm rsaAlgo = certificatEnCours.PublicKey.Key;
byte[] data = null;
byte[] hash = null;

string keyPublic = "";
string signatureLikeInteger = "";

bool verif = false;

// ------------- PART 1 -------------

signatureLikeInteger = certificatEnCours.Thumbprint;

data = Convert.FromBase64String(signatureLikeInteger);

// ------------- PART 2 -------------

hash = sha1.ComputeHash(certificatEnCours.RawData);

keyPublic = rsaAlgo.ToXmlString(false);

csp = new RSACryptoServiceProvider();

csp.FromXmlString(keyPublic);

// ------------------------------

verif = csp.VerifyData(hash, CryptoConfig.MapNameToOID("SHA1"), data);

我的问题是我的变量“verif”上已经有值“false”。

I have a little problem. I want to verify the integrity of a certificate.

So I did this code:

using System.Security.Cryptography;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates; 

SHA1Managed sha1 = new SHA1Managed();
RSACryptoServiceProvider csp = null;
AsymmetricAlgorithm rsaAlgo = certificatEnCours.PublicKey.Key;
byte[] data = null;
byte[] hash = null;

string keyPublic = "";
string signatureLikeInteger = "";

bool verif = false;

// ------------- PART 1 -------------

signatureLikeInteger = certificatEnCours.Thumbprint;

data = Convert.FromBase64String(signatureLikeInteger);

// ------------- PART 2 -------------

hash = sha1.ComputeHash(certificatEnCours.RawData);

keyPublic = rsaAlgo.ToXmlString(false);

csp = new RSACryptoServiceProvider();

csp.FromXmlString(keyPublic);

// ------------------------------

verif = csp.VerifyData(hash, CryptoConfig.MapNameToOID("SHA1"), data);

My problem its that i already have the value "false" on my variable "verif".

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那小子欠揍 2024-08-01 10:09:00

这里没有实际的问题。 你是对的,你无条件忽略了 verif 的初始值。 更重要的是,您是否考虑过使用X509Certificate2来做验证?:

X509Certificate2 x2 = new X509Certificate2(certificatEnCours);
bool verif = x2.Verify();

我认为这比重新发明轮子更明智。

编辑:如果您正在验证证书链,我相信您想要使用 X509Chain
特别是 ChainStatus 属性。

There is no actual question here. You are right that you are unconditionally ignoring the initial value of verif. More importantly, have you considered using X509Certificate2 to do verification?:

X509Certificate2 x2 = new X509Certificate2(certificatEnCours);
bool verif = x2.Verify();

I think this is wiser than re-inventing the wheel.

EDIT: If you are verifying a chain of certificates I believe you want to use X509Chain
and in particular the ChainStatus property.

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