[JIRA] (IDP-1872) Use __Host- prefix cookie names to ensure cookies come from the host

[Philip Brusten (Jira)]

Philip Brusten ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=5b87bcb44d21642beb80e004 ) *created* an issue

Identity Provider ( https://shibboleth.atlassian.net/browse/IDP?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 ) / Improvement ( https://shibboleth.atlassian.net/browse/IDP-1872?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 ) IDP-1872 ( https://shibboleth.atlassian.net/browse/IDP-1872?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 ) Use __Host- prefix cookie names to ensure cookies come from the host ( https://shibboleth.atlassian.net/browse/IDP-1872?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 )

Issue Type: Improvement Affects Versions: 4.1.4 Assignee: Scott Cantor ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A5b78efc9-1379-42cc-a3f6-56c6ea3a0007 ) Components: Authentication Created: 22/Oct/21 3:23 AM Priority: Trivial Reporter: Philip Brusten ( https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=5b87bcb44d21642beb80e004 )

It is better to use __Host- prefixed cookies. They ensure that the cookies are set secure and on the host only (not on a domain which shares a common domain).

e.g. the SPNEGO autologin cookie is now a constant, which cannot be changed:

SPNEGOAutoLoginManager.java:
```java
@Nonnull @NotEmpty public static final String AUTOLOGIN_COOKIE_NAME = "_idp_spnego_autologin";
```

The cookie path must be "path=/". If you host multiple IdP instances on the same domain, this might be a problem. In that case it's better to make the name configurable so it can be scoped to that instance.

( https://shibboleth.atlassian.net/browse/IDP-1872#add-comment?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 ) Add Comment ( https://shibboleth.atlassian.net/browse/IDP-1872#add-comment?atlOrigin=eyJpIjoiZTNlNzZhZTdiYjQ1NGE5ZjljOTk2YjFhODMzNDAyNTEiLCJwIjoiaiJ9 )

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