Encrypt Function

Feb 16, 2003

Hi all

I have got an application developed on SQL7 which I have migrated to SQL2K.
It handles authentication internally and therefore stores usernames & passwords in a local table. The passwords are stored encrypted utilizing a function called "encrypt" taking the password in clear-text and returning a varbinary. When a user logs on his password input is encrypted the same way and compared to the stored password. So far so good...
Problem: On SQL2K the encrypt function returns a different result as it does on SQL7., which reults in authentication failures.
Unfortunately I cannot find any documentation about the encrypt function e.g. in BOL. Furthermore I cannot ask the developer who introduced the function anymore.

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Hi,
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Here are the Reqs:

Certificate Requirements

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Hi
I am using sql server 2005, I want to encrypt data and i am using Symmetric key.
In Symmetric key encrypt the varchar , varbinary data encrypt but for integer it show the error.
so please suggest me can we encrypt the integer data.
if yes then how ?
In below example if we use integer then encrypt it will show error.




--1) Create master key.

CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'Asit'

--2) Create certificate.

CREATE CERTIFICATE CertificateTest2

WITH SUBJECT ='CertificateTest2'

--3) Create SYMMETRIC KEY .

CREATE SYMMETRIC KEY TestSymKey

WITH ALGORITHM = TRIPLE_DES

ENCRYPTION BY CERTIFICATE CertificateTest2

--4) Open SYMMETRIC KEY .

OPEN SYMMETRIC KEY TestSymKey

DECRYPTION BY CERTIFICATE CertificateTest2;

--5) create table.

create table SYMMETRIC1

(

id varchar(100) not null primary key ,

name varbinary(MAX) not null,

card_num varbinary(MAX) not null

);

--6)SEA THE RECORDS

SELECT * FROM SYMMETRIC1

--7)INSERT RECORD IN TABLE

INSERT INTO SYMMETRIC1(ID,NAME,CARD_NUM)VALUES (

EncryptByKey( key_guid('TestSymKey'),'2',1,'SQL Server') ,

EncryptByKey( key_guid('TestSymKey'),'Asit sinha',1,'SQL Server'),

EncryptByKey( key_guid('TestSymKey'),'11',1,'SQL Server') )

--8)FETCH ENCRYPTED RECORD FROM TABLE AND DECRYPT THE VALUE

SELECT

convert(varchar(max),DecryptByKey(id,1,'SQL Server')) as ID,

convert(varchar(max),DecryptByKey(Name,1,'SQL Server')) as Name,

convert(varchar(max),DecryptByKey(card_num,1,'SQL Server')) as Card_Num

FROM SYMMETRIC1

--9)SEA THE RECORDS

SELECT * FROM SYMMETRIC1

Asit Sinha

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Do you see anything wrong with this? The first select works and finds rows the second one does not. I have opened the Key since the first query does find rows.


select *

from [dbo].[dmTable]

WHERE cast(decryptByKey(field) as varchar(50)) = 'Value'



select *

from [dbo].[dmTable]

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