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Convert date in varbinary encrypted column back to date in sql server

Apr 9 2021 9:28 PM
Please i need help with sql server data type conversion.
So i inserted this date '2022-12-01 after encrypting into a varbinary column DateAllowed.
 
INSERT INTO Tablename (Username, Password, UserType, DateAllowed)
VALUES ('Username', EncryptByKey(KEY_GUID('SymmetricKey'), 'Password'), EncryptByKey(KEY_GUID('SymmetricKey'), 'exampletext'), EncryptByKey(KEY_GUID('SymmetricKey'), '2022-12-01'));
 
It inserted successfully but when i select DateAllowed by decrypting and try to convert the decrypted text to date i get this error.
 
Msg 241, Level 16, State 1, Line 4
Conversion failed when converting date and/or time from character string.
 
 
The Query i used is below 
OPEN SYMMETRIC KEY RMSSQLSymmetricKey DECRYPTION BY PASSWORD = 'Password';
SELECT CONVERT(date, DecryptByKey(DateAllowed)) AS 'DateAllowed1' FROM Tablename;
 
The interesting part is, if i use  varchar i get the date  back
SELECT CONVERT(varchar, DecryptByKey(DateAllowed)) AS 'DateAllowed1' FROM Tablename;
The problem with this too is that when i get the date as varchar C# program i make in visual studio does not recognise as date datatype even if i try to convert it to DateTime.
 
Please i need this solved urgently. 
How can i convert the Date that is in varbinary back to date.

Answers (1)