DSACryptoServiceProvider.VerifyHash(Byte[], String, Byte[]) Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Source:

DSACryptoServiceProvider.Unix.cs

Verifies the specified signature data by comparing it to the signature computed for the specified hash value.

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);

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

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

Parameters

rgbHash

Byte[]

The hash value of the data to be signed.

str

String

The name of the hash algorithm used to create the hash value of the data.

rgbSignature

Byte[]

The signature data to be verified.

Returns

Boolean

true if the signature verifies as valid; otherwise, false.

Exceptions

ArgumentNullException

The rgbHash parameter is null.

-or-

The rgbSignature parameter is null.

CryptographicException

The cryptographic service provider (CSP) cannot be acquired.

-or-

The signature cannot be verified.

Remarks

This method verifies the DSA digital signature produced by SignHash.

If the str parameter is null, the default hash algorithm (SHA1) is used. The valid hash algorithms is SHA1.

Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.

See also

• Cryptographic Services