|
It's looking that way.--
If you want to try methods outside of SQL you can research
https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_74/apis/catcrypt2.htm
For assistance from IBM you can open up a case at
https://www.ibm.com/support/home/
If they confirm the answer is a no but you'd like them to change their
minds you can open up a RFE or Request For Enhancement at
https://www.ibm.com/developerworks/rfe/execute?use_case=changeRequestLanding&BRAND_ID=352&PROD_ID=1476&x=11&y=13
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Rishi Seth
Sent: Tuesday, October 1, 2019 7:04 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Regarding Decryption of AES128 encrypted data in RPGLE and
query regarding CRC 32 [PRIVATE REPLY]
CAUTION: This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and know
the content is safe.
Hi,
Is this conclusion now true that we can not decrypt data using AES
algorithm in AS400 programming language which is encrypted using web link
in UTF8 or other ASCII values like here as mentioned in previous mails?
Thanks
On Mon, Sep 30, 2019 at 7:13 PM Peter Dow <petercdow@xxxxxxxxx> wrote:
Hi Rishi,u3VtNgfyWU9faZc3Iaa8ZWbE5UZCfmC17yA4MyW0ghflt9dNQNDpCcgMZiG/kXPE4vv2CHL93B4iKiODHxxdVA==
I went to the website you mentioned,
https://www.devglan.com/online-tools/aes-encryption-decryption, and
tried decrypting
it.
with password (secret key)
6-9d15-ec98bcc81ec4275OIM1TS7LI
and I noticed a couple of things.
1. Since the encryption is AES128, the password length must be 16
bytes. The pswd in your program is 31 bytes.
2. The "encrypted" data is actually base64 encoded. In order to decrypt
it in RPG, you would first have to decode it from base64, then decrypt
key
On top of that, when I used the aforementioned website to encrypt
'whatever text', in AES with 128-bit key, mode ECB, and password
'mypasswordis16xy', the encrypted value is
x'831720A57F742CBB3A86AB24A3AA23AE'.
If I use the SQL encrypt_AES function, with the same password, the
encrypted value is
x'4CB947FF0025D5A6B96180506FFE4F23B96180506FFE4F23'.
The reason for this difference probably has something to do with the
following notes from IBM's SQL manual on the encrypt_AES function:
"The length attribute of the result depends on the arguments that are
specified:
* when /password-string/ is specified but a /hint-string/ is not
specified, the length
attribute of /data-string/ plus 24 plus the number of bytes to a
16-byte boundary.
* Otherwise, the length attribute of /data-string/ plus 64 plus the
number of bytes to
a 16-byte boundary."
Apparently IBM's encrypt_AES function includes more than just the
encrypted value in its result.
In short, it looks like you cannot use IBM's decrypt_AES function to
decrypt a value encrypted by anything other than IBM's encrypt_AES
function.
--
*Peter Dow* /
Dow Software Services, Inc.
909 793-9050
petercdow@xxxxxxxxx <mailto:petercdow@xxxxxxxxx>
pdow@xxxxxxxxxxxxxx <mailto:pdow@xxxxxxxxxxxxxx>
/
On 9/30/2019 4:50 AM, Rishi Seth wrote:
I Know below is the IBM API for same but need a real working examplewhich
could decrypt data which is encoded using UTF8 or ACII. with 128 bit
listand Mode is ECB?
---
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