SignByAsymKey (Transact-SQL)
SQL Server 2008
Signs plaintext with an asymmetric key
The following example creates a table, SignedData04, in which to store plaintext and its signature. It next inserts a record in the table, signed with asymmetric key PrimeKey, which is first decrypted with password 'pGFD4bb925DGvbd2439587y'.
-- Create a table in which to store the data
CREATE TABLE [SignedData04]( Description nvarchar(max), Data nvarchar(max), DataSignature varbinary(8000) );
GO
-- Store data together with its signature
DECLARE @clear_text_data nvarchar(max);
set @clear_text_data = N'Important numbers 2, 3, 5, 7, 11, 13, 17,
19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79,
83, 89, 97';
INSERT INTO [SignedData04]
VALUES( N'data encrypted by asymmetric key ''PrimeKey''',
@clear_text_data, SignByAsymKey( AsymKey_Id( 'PrimeKey' ),
@clear_text_data, N'pGFD4bb925DGvbd2439587y' ));
GO
