Solved

Equivalent functions in sql server 2000 against functions of powerbuilder 7.

Posted on 2004-08-11
5
632 Views
Last Modified: 2008-02-01

SELECT USER_ID,PASSWORD FROM PASSWORD

USER_ID PASSWORD
A      “›‹‡
B      ³¹‡
C      §‹µ¹•¥
D      ¯‹‘…§

The values in the column password has been saved from within a front end by a function f_encrypt.

Here
“›‹‡   means DIBA      (created from f_encrypt('DIBA'))
³¹‡   means BUYA
§‹µ¹•¥ means NAWZIR
¯‹‘…§ means RADFAS

Please note that “›‹‡ is created from f_encrypt('DIBA').Similarly DIBA can be obtained by f_decrypt('“›‹‡')

The two functions are:
[function f_encrypt]
integer chrvalue, seed,mlen,i
string  mstring, mchar
chrvalue = 0
seed = 17
mchar = ''
mstring  = trim(given_string)  
mlen     = len(mstring)
FOR  I = 1 TO mlen
     chrvalue = asc(mid(mstring,I,1))
     chrvalue = ((chrvalue + seed + 95 - I)*2) - 211
     mchar = mchar + char(chrvalue)
next
return (mchar)

[function f_decrypt]
integer chrvalue,i,mlen, seed
string mstring, mchar

chrvalue = 0
seed = 17
mchar = ''
mstring = trim(given_string)  
mlen    = len(mstring)

for  I = 1 TO mlen
       chrvalue = ASC(mid(mstring,I,1))
       chrvalue = (chrvalue + 211)/2 +I -  95 - SEED
       mchar    = mchar + char(chrvalue)
next

return (mchar)

I want those two functions/procedure to be created in sql server 2000.
0
Comment
Question by:Mateen
  • 3
  • 2
5 Comments
 
LVL 12

Accepted Solution

by:
patrikt earned 500 total points
ID: 11781081
First one:

CREATE FUNCTION f_encrypt (@given_string varchar(50))
RETURNS varchar(50)
AS
BEGIN
declare @chrvalue int, @seed int, @mlen int,@i int
declare @mstring varchar(50), @mchar varchar(50)

SELECT @chrvalue = 0,@seed = 17,@mchar = ''
SET @mstring  = ltrim(rtrim(@given_string))  
SET @mlen     = len(@mstring)
SET @i=1
WHILE @i<=@mlen
BEGIN
     SET @chrvalue = ascii(substring(@mstring,@I,1))
     SET @chrvalue = ((@chrvalue + @seed + 95 - @I)*2) - 211
     SET @mchar = @mchar + char(@chrvalue)
     set @I=@I+1
END
return (@Mchar)
END
0
 
LVL 12

Expert Comment

by:patrikt
ID: 11781104
Secon one:
CREATE functION f_decrypt (@given_string varchar(50))
RETURNS varchar(50)
AS
BEGIN
declare @chrvalue int,@i int,@mlen int, @seed int
declare @mstring varchar(50), @mchar varchar(50)

SELECT @chrvalue = 0,@seed = 17,@mchar = ''
SET @mstring = ltrim(rtrim(@given_string))  
SET @mlen    = len(@mstring)
SET @i=1

WHILE @I <= @mlen
BEGIN
       SET @chrvalue = ASCii(substring(@mstring,@I,1))
       SET @chrvalue = (@chrvalue + 211)/2 +@I -  95 - @SEED
       SET @mchar    = @mchar + char(@chrvalue)
      SET @i=@i+1
END

return (@mchar)
END
0
 
LVL 12

Expert Comment

by:patrikt
ID: 11781116
I only rewrited sintax to SQL. You have to check data types if it is usable for your scenario.

SQL hates loops so I would try to find beter performing aproach...But for short strings it is not significant.

Patrik
0
 

Author Comment

by:Mateen
ID: 11781254
Many many thanks patrikt
0
 

Author Comment

by:Mateen
ID: 11781272
Please do submit when u find better approach. I shall be delighted.
0

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Slowly Changing Dimension Transformation component in data task flow is very useful for us to manage and control how data changes in SSIS.
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
Familiarize people with the process of utilizing SQL Server functions from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Ac…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.

679 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question