SignByCert (Transact-SQL)

Signs text with a certificate and returns the signature.

Syntax

SignByCert( certificate_ID, @cleartext [,'password' ] )

Arguments

  • certificate_ID
    The ID of a certificate in the current database. int.
  • @cleartext
    A variable of type nvarchar, char, varchar, or nchar containing data that will be signed.
  • 'password'
    The password with which the certificate's private key was encrypted. nvarchar(128).

Return Types

varbinary with a maximum size of 8,000 bytes.

Remarks

Requires CONTROL permission on the certificate.

Examples

The following example signs the text in @SensitiveDatawith certificate ABerglundCert07, having first decrypted the certificate with password "pGFD4bb925DGvbd2439587y". It then inserts the cleartext and the signature in table SignedData04.

DECLARE @SensitiveData nvarchar(max);
SET @SensitiveData = N'Saddle Price Points are 
    2, 3, 5, 7, 11, 13, 17, 19, 23, 29';
INSERT INTO [SignedData04]
    VALUES( N'data signed by certificate ''ABerglundCert07''',
    @SensitiveData, SignByCert( Cert_Id( 'ABerglundCert07' ), 
    @SensitiveData, N'pGFD4bb925DGvbd2439587y' ));
GO

See Also

Reference

VerifySignedByCert (Transact-SQL)
Cert_ID (Transact-SQL)
CREATE CERTIFICATE (Transact-SQL)
ALTER CERTIFICATE (Transact-SQL)
DROP CERTIFICATE (Transact-SQL)

Other Resources

Encryption Hierarchy

Help and Information

Getting SQL Server 2005 Assistance