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IBM Tivoli Access Manager for e-business: WebSEAL Administration ...

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[e-community-sso]<br />

ecsso-allow-unauth<br />

=<br />

{yes|no}<br />

When<br />

ecsso-allow-unauth<br />

is<br />

set<br />

to<br />

yes,<br />

unauthenticated<br />

access<br />

is<br />

enabled.<br />

The<br />

default<br />

setting<br />

is<br />

yes.<br />

When<br />

ecsso-allow-unauth<br />

is<br />

set<br />

to<br />

no,<br />

unauthenticated<br />

access<br />

is<br />

disabled.<br />

In<br />

this<br />

case,<br />

clients<br />

must<br />

authenticate<br />

through<br />

the<br />

master<br />

authentication<br />

server<br />

when<br />

requesting<br />

access<br />

to<br />

a<br />

resource<br />

(protected<br />

or<br />

not<br />

protected)<br />

on<br />

an<br />

e-community<br />

SSO<br />

slave<br />

server.<br />

Note:<br />

The<br />

default<br />

behavior<br />

changed<br />

<strong>for</strong><br />

<strong>WebSEAL</strong><br />

Version<br />

5.1.<br />

In<br />

prior<br />

versions,<br />

unauthenticated<br />

access<br />

was<br />

disabled.<br />

To<br />

retain<br />

backwards<br />

compatible<br />

behavior<br />

with<br />

older<br />

versions<br />

of<br />

<strong>WebSEAL</strong>,<br />

set<br />

ecsso-allow-unauth<br />

=<br />

no.<br />

UTF-8<br />

encoding<br />

of<br />

tokens<br />

<strong>for</strong><br />

e-community<br />

single<br />

sign-on<br />

The<br />

use<br />

of<br />

UTF-8<br />

encoding<br />

<strong>for</strong><br />

strings<br />

within<br />

tokens<br />

used<br />

<strong>for</strong><br />

e-community<br />

single<br />

sign-on<br />

is<br />

specified<br />

in<br />

the<br />

<strong>WebSEAL</strong><br />

configuration<br />

file.<br />

[e-community-sso]<br />

use-utf8<br />

=<br />

{yes|no}<br />

The<br />

default<br />

value<br />

is<br />

yes.<br />

When<br />

use-utf8<br />

is<br />

set<br />

to<br />

no,<br />

strings<br />

are<br />

encoded<br />

using<br />

the<br />

local<br />

code<br />

page.<br />

Use<br />

this<br />

value<br />

when<br />

implementing<br />

e-community<br />

single<br />

sign-on<br />

with<br />

older<br />

(pre-Version<br />

5.1)<br />

<strong>WebSEAL</strong><br />

servers.<br />

<strong>WebSEAL</strong><br />

servers<br />

from<br />

versions<br />

prior<br />

to<br />

5.1<br />

do<br />

not<br />

use<br />

UTF-8<br />

encoding<br />

<strong>for</strong><br />

tokens.<br />

When<br />

deploying<br />

an<br />

environment<br />

that<br />

includes<br />

these<br />

older<br />

servers,<br />

configure<br />

the<br />

Version<br />

5.1<br />

<strong>WebSEAL</strong><br />

server<br />

to<br />

not<br />

use<br />

UTF-8<br />

encoding.<br />

This<br />

setting<br />

is<br />

necessary<br />

<strong>for</strong><br />

backwards<br />

compatibility.<br />

For<br />

more<br />

in<strong>for</strong>mation<br />

on<br />

<strong>WebSEAL</strong><br />

support<br />

<strong>for</strong><br />

UTF-8<br />

encoding,<br />

see<br />

“Multi-locale<br />

support<br />

with<br />

UTF-8”<br />

on<br />

page<br />

44.<br />

Enabling<br />

compatibility<br />

with<br />

tokens<br />

prior<br />

to<br />

Version<br />

4.1<br />

In<br />

the<br />

Version<br />

4.1<br />

release<br />

of<br />

<strong>Tivoli</strong><br />

<strong>Access</strong><br />

<strong>Manager</strong>,<br />

the<br />

level<br />

of<br />

security<br />

<strong>for</strong><br />

the<br />

encryption<br />

of<br />

the<br />

authentication<br />

token<br />

was<br />

increased.<br />

The<br />

Version<br />

4.1<br />

encryption<br />

algorithm<br />

is<br />

not<br />

backward<br />

compatible.<br />

If<br />

you<br />

are<br />

integrating<br />

ECSSO<br />

with<br />

servers<br />

using<br />

versions<br />

of<br />

<strong>Tivoli</strong><br />

<strong>Access</strong><br />

<strong>Manager</strong><br />

prior<br />

to<br />

Version<br />

4.1,<br />

you<br />

must<br />

enable<br />

the<br />

pre-410-compatible-tokens<br />

parameter<br />

in<br />

the<br />

[server]<br />

stanza<br />

of<br />

the<br />

<strong>WebSEAL</strong><br />

configuration<br />

file.<br />

For<br />

example:<br />

pre-410-compatible-tokens<br />

=<br />

yes<br />

The<br />

default<br />

setting<br />

<strong>for</strong><br />

this<br />

parameter<br />

is<br />

″no″.<br />

Enable<br />

backwards<br />

compatibility<br />

<strong>for</strong><br />

Version<br />

4.1<br />

tokens<br />

For<br />

<strong>Tivoli</strong><br />

<strong>Access</strong><br />

<strong>Manager</strong><br />

Version<br />

5.1,<br />

the<br />

<strong>for</strong>mat<br />

of<br />

the<br />

encryption<br />

of<br />

the<br />

authentication<br />

token<br />

was<br />

changed.<br />

This<br />

encryption<br />

algorithm<br />

is<br />

not<br />

backward<br />

compatible.<br />

If<br />

you<br />

are<br />

integrating<br />

authentication<br />

tokens<br />

with<br />

Version<br />

4.1<br />

<strong>WebSEAL</strong><br />

servers,<br />

you<br />

must<br />

specify<br />

a<br />

configuration<br />

file<br />

setting<br />

in<br />

the<br />

<strong>WebSEAL</strong><br />

configuration<br />

file<br />

to<br />

enable<br />

backwards<br />

compatibility.<br />

Backwards<br />

compatibility<br />

with<br />

the<br />

older<br />

encryption<br />

<strong>for</strong>mat<br />

is<br />

not<br />

enabled<br />

by<br />

default:<br />

Chapter<br />

9.<br />

Client<br />

single<br />

sign-on<br />

solutions<br />

271

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