RSACryptoServiceProvider.VerifyHash 方法

來源:

RSACryptoServiceProvider.Unix.cs

來源:

RSACryptoServiceProvider.Unix.cs

來源:

RSACryptoServiceProvider.Unix.cs

public:
 bool VerifyHash(cli::array <System::Byte> ^ rgbHash, System::String ^ str, cli::array <System::Byte> ^ rgbSignature);

public bool VerifyHash (byte[] rgbHash, string str, byte[] rgbSignature);

override this.VerifyHash : byte[] * string * byte[] -> bool

member this.VerifyHash : byte[] * string * byte[] -> bool

Public Function VerifyHash (rgbHash As Byte(), str As String, rgbSignature As Byte()) As Boolean

參數

傳回

如果簽章有效則為 true，否則為 false。

例外狀況

範例

下列範例示範如何使用 VerifyHash 方法來驗證簽章。 此程式碼範例是方法所提供較大範例的 SignHash 一部分。

bool VerifyHash( RSAParameters rsaParams, array<Byte>^signedData, array<Byte>^signature )
{
   RSACryptoServiceProvider^ rsaCSP = gcnew RSACryptoServiceProvider;
   SHA1Managed^ hash = gcnew SHA1Managed;
   array<Byte>^hashedData;
   rsaCSP->ImportParameters( rsaParams );
   bool dataOK = rsaCSP->VerifyData(signedData, CryptoConfig::MapNameToOID("SHA1"), signature);
   hashedData = hash->ComputeHash( signedData );
   return rsaCSP->VerifyHash( hashedData, CryptoConfig::MapNameToOID( "SHA1" ), signature );
}

public bool VerifyHash(RSAParameters rsaParams, byte[] signedData, byte[] signature)
{
    RSACryptoServiceProvider rsaCSP = new RSACryptoServiceProvider();
    SHA1Managed hash = new SHA1Managed();
    byte[] hashedData;

    rsaCSP.ImportParameters(rsaParams);
    bool dataOK = rsaCSP.VerifyData(signedData, CryptoConfig.MapNameToOID("SHA1"), signature);
    hashedData = hash.ComputeHash(signedData);
    return rsaCSP.VerifyHash(hashedData, CryptoConfig.MapNameToOID("SHA1"), signature);
}

Public Function VerifyHash(ByVal rsaParams As RSAParameters, ByVal signedData() As Byte, ByVal signature() As Byte) As Boolean
    Dim rsaCSP As New RSACryptoServiceProvider()
    Dim hash As New SHA1Managed()
    Dim hashedData() As Byte
    Dim dataOK As Boolean

    rsaCSP.ImportParameters(rsaParams)
    dataOK = rsaCSP.VerifyData(signedData, CryptoConfig.MapNameToOID("SHA1"), signature)
    hashedData = hash.ComputeHash(signedData)
    Return rsaCSP.VerifyHash(hashedData, CryptoConfig.MapNameToOID("SHA1"), signature)
End Function 'VerifyHash

備註

這個方法會 RSA 驗證 方法所產生的 SignHash 數位簽章。 簽章的驗證方式是使用簽章簽署的公開金鑰，從簽章取得雜湊值，並將該值與所提供資料的雜湊值進行比較。

有效的雜湊演算法為 SHA1 和 MD5 。 演算法識別碼可以使用 方法來衍生自雜湊名稱 MapNameToOID 。

由於 SHA1 和 MD5 發生衝突問題，Microsoft 建議根據 SHA256 或更好的安全性模型。

另請參閱

• VerifyHash(Byte[], Byte[], HashAlgorithmName, RSASignaturePadding)
• 密碼編譯服務

來源:

RSACryptoServiceProvider.Unix.cs

來源:

RSACryptoServiceProvider.Unix.cs

來源:

RSACryptoServiceProvider.Unix.cs

public:
 override bool VerifyHash(cli::array <System::Byte> ^ hash, cli::array <System::Byte> ^ signature, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, System::Security::Cryptography::RSASignaturePadding ^ padding);

public override bool VerifyHash (byte[] hash, byte[] signature, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, System.Security.Cryptography.RSASignaturePadding padding);

override this.VerifyHash : byte[] * byte[] * System.Security.Cryptography.HashAlgorithmName * System.Security.Cryptography.RSASignaturePadding -> bool

Public Overrides Function VerifyHash (hash As Byte(), signature As Byte(), hashAlgorithm As HashAlgorithmName, padding As RSASignaturePadding) As Boolean

參數

傳回

如果簽章有效則為 true，否則為 false。

例外狀況