Using the CryptVerifyMessageSignature Function

A single function, CryptVerifyMessageSignature, can be used to verify a signature, as shown in the following procedure.

    To verify a signed message

1. Get a pointer to the signed message.
2. Get the size of the signed message.
3. Get a handle on a cryptographic provider.
4. Initialize the CRYPT_VERIFY_MESSAGE_PARA structure.
5. Call CryptVerifyMessageSignature to verify the signature.