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

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Definition

Namespace:
System.Security.Cryptography
Assemblies:
netstandard.dll, System.Security.Cryptography.dll
Assemblies:
netstandard.dll, System.Security.Cryptography.Csp.dll
Assemblies:
netstandard.dll, System.Security.Cryptography.dll, System.Security.Cryptography.Csp.dll
Assembly:
System.Security.Cryptography.Csp.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
DSACryptoServiceProvider.Unix.cs
Source:
DSACryptoServiceProvider.Unix.cs
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);
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 (SHA-1) is used.

Due to collision problems with SHA-1, Microsoft recommends a security model based on SHA-256 or better.

Applies to

See also