But shouldn't the system, when connecting to another server, see that they
are using 1.2 and use that? Or does the latest CUM turn off anything
except 1.3?

It's similar to another issue I had with a client. They were getting an
error connecting to a server. We got a list of all the ciphers the server
had available and we had most of them matched on the IBM i, minus a few
older ciphers. But we still had to enable a couple older ciphers manually
to make it work.

You'd think with a choice of 10 or more that match the system could chose
to use one of those instead of the old outdated cipher the server had
(which was there mainly for older systems).

On Tue, Oct 27, 2020 at 12:36 PM Steinmetz, Paul via WEB400 <
web400@xxxxxxxxxxxxxxxxxx> wrote:

Brad,

I had to do the same.
IBM has a tech doc on this.
It actually disables TLSV1.3, which Is the new default with the latest
CUME PTFs.
Not all our network devices support TLSV1.3, thus had to revert to
previous settings.
*TLSV1.2
*TLSV1.1
*TLSV1

TLSv1.3 could a simple change for some, but for us it will a while.

Paul

-----Original Message-----
From: WEB400 <web400-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Brad Stone
Sent: Tuesday, October 27, 2020 1:31 PM
To: Web Enabling the IBM i (AS/400 and iSeries) <web400@xxxxxxxxxxxxxxxxxx

Subject: Re: [WEB400] SSL API Issues after latest CUM PTFs on V7R3

________________________________
CAUTION: This email originated from outside of the PENCOR network. Do not
click on any links or open attachments unless the sender is known, and the
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________________________________

Well, my client had a call with IBM.
IBM had them change the system value QSSLPCL from *OPSYS to a list:
*TLSV1.2
*TLSV1.1
*TLSV1

And that seemed to fix their specific issue. Doesn't make sense (well, it
does). I have a feeling their trading partner was using older version of
TLS. That should have been easy to tell. Seems like a bandaid fix.

On Tue, Oct 6, 2020 at 10:09 AM Gerald Magnuson <
gmagqcy.midrange@xxxxxxxxx>
wrote:

Sorry, I should clarify , we use HTTPAPI here.

On Tue, Oct 6, 2020 at 9:40 AM Brad Stone <bvstone@xxxxxxxxx> wrote:

I'd sure love to be able to test it, though. Then I could figure
out if
I
needed to just retry the handshake, or if I need to totally restart
the connection. But the trace from the customer did show that the
SSL handshake wasn't working properly...

On Tue, Oct 6, 2020 at 9:20 AM Charles Wilt <charles.wilt@xxxxxxxxx>
wrote:

I'd agree that there should be a number of retries.

Charles

On Tue, Oct 6, 2020 at 7:05 AM Brad Stone <bvstone@xxxxxxxxx> wrote:

Thanks for following up. I haven't heard from my customers yet
either
(which I normally take as a good thing).

I wonder if in our applications if a handshake fails we should
have a default number of retries. The only issue is I can't
recreate the
issue
on
my end to test with.

On Tue, Oct 6, 2020 at 7:59 AM Gerald Magnuson <
gmagqcy.midrange@xxxxxxxxx

wrote:

The PTF (MF67570) didn't fix it.

On Mon, Oct 5, 2020 at 1:48 PM Brad Stone <bvstone@xxxxxxxxx>
wrote:

Keep up updated on your issues and if the PTF IBM suggest
solves
the
issue.

On Mon, Oct 5, 2020 at 1:43 PM Gerald Magnuson <
gmagqcy.midrange@xxxxxxxxx

wrote:

Also, not only are we getting the TLSv1.2 Peer not
recognized...
errors
when connecting to our internal servers (HAProxy), were
have
been
getting that -16 error when we try to connect to one of
our
VANs
(COVISINT).

On Mon, Oct 5, 2020 at 1:22 PM Gerald Magnuson <
gmagqcy.midrange@xxxxxxxxx

wrote:

We have had these errors since we went to 7.4 on Labor Day.
After
changing ciphers and putting on all the latest PTF
groups,
we
now
have
this very strange symptom: these errors "(GSKit) Peer
not
recognized
or
badly formatted message received." are only happening
between
the
hours
of 6am through 10am (we may get 1 or 2 outside of this
time
frame).

I have just installed that ptf (MF67593 - 7.4 MF67570),
so
let's
see
what
tomorrow brings.

On Thu, Oct 1, 2020 at 4:07 PM Brad Stone
<bvstone@xxxxxxxxx

wrote:

Info from IBM that a customer got:

-APAR MA48442 (“OSP-OTHER-UNPRED SYSTEM TLS FAILS
TLSV1.2
SERVER
HELLO
WITHOUT EXTENSION DATA LENGTH”) -Update a few PTF
Groups to current levels -Apply PTF MF67593, which
isn’t in any PTF Group.

So it does seem to be an IBM issue that has already
been
(hopefully)
fixed. I will know for sure after the weekend.

I tried searching for PTFs but that seems futile these
days...
unless
I'm
just not understanding how their newer searches
work...lol.

On Thu, Oct 1, 2020 at 10:07 AM Brad Stone <
bvstone@xxxxxxxxx

wrote:

Hi, Jeff.

I haven't seen any issues with Google, no. I just am
wondering
if
it's
an
issue with only certain endpoints. It's hard to
tell. I
am
hoping
to
hear
from one customer to see what IBM tells them.

On Thu, Oct 1, 2020 at 9:36 AM Jeff Crosby <
jlcrosby@xxxxxxxxxxxxxxxx

wrote:

Is this 7.3? Would this possibly affect my using
G4G
uploading
PDFs?

Asking because I'm set to IPL and apply some PTF
groups
tomorrow
night.

Thanks.



On Thu, Oct 1, 2020 at 10:23 AM Brad Stone <
bvstone@xxxxxxxxx>
wrote:

I have a few customers that seem to be reporting
an
issue
with
the
IBM
SSL
APIs after applying a recent PTF group when using
GETURI
(HTTPAPI
also
reports the same issues) communicating with a web
service.

Also from tests using cURL and PHP on the IBM i
the
error
cannot
be
reproduced, neither can it on the PC using
Postman,
etc.

Randomly they are receiving the error:

415 - Peer not recognized or badly formatted
message
received.

If the standard SSL APIs are used RC is normally
-16
if I
recall.

One customer was able to work with a trading
partner
and
they
did a
trace
on their end and tracked it down to the "Hello"
communications
from
the
IBM
i during SSL negotiation.

What they saw and explained was something like this:

"...When everything is working fine we have
noticed the
server
hellos
are
super small …376 bytes which is an indication of
TLS
session
reuse.
Then
there is an attempt to do TLS reuse with a
different
proxy
or
backend
server and it fails which is likely this TLS FATAL
illegal
parameter
error. The NEXT server hello is much larger, 3586
bytes,
because
the
TLS
session is trashed and has to start over.


It then works for a while with the little server
hello's
doing
session
reuse ... until a proxy or backend server gets
switched
and
it
blows
up
and
starts all over..."


So, when this error is reported on the IBM i seems
to
correlate
with
what
they see on their end where the TLS session is
"trashed".


My suspicion is that a recent PTF broke this,
since it
worked
for
years
previously and after the PTFs this behavior started.


I have the customer contacting IBM to see when
they can
find
with
all
this
information, but I am just curious if anyone else
is
experiencing
this
issue and what they have found.


Thanks.


Bradley V. Stone
www.bvstools.com
Native IBM i e-Mail solutions for Microsoft Office
365,
Gmail,
or
any
Cloud
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direct.dilgardfoods.com

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