VerifyHash Method

RSACryptoServiceProvider.VerifyHash Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Verifies that a digital signature is valid by determining the hash value in the signature using the provided public key and comparing it to the provided hash value.

Namespace:  System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

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

Parameters

rgbHash
Type: System.Byte []
The hash value of the signed data.
str
Type: System.String
The hash algorithm identifier (OID) used to create the hash value of the data.
rgbSignature
Type: System.Byte []
The signature data to be verified.

Return Value

Type: System.Boolean
true if the signature is valid; otherwise, false.

ExceptionCondition
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.

This method verifies the RSA digital signature produced by the SignHash method. The signature is verified by obtaining the hash value from the signature using the public key it was signed with, and comparing that value to the hash value of the provided data.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1

Windows Phone

Show:
© 2017 Microsoft