This PR was merged into the 2.0 branch.
Commits
-------
f2cbea3 [Security] remove escape charters from username provided by Digest DigestAuthenticationListener
80f6992 [Security] added test extra for digest authentication
d66b03c fixed CS
694697d [Security] Fixed digest authentication
c067586 [Security] Fixed digest authentication
Discussion
----------
Fix digest authentication
Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets:
Todo: -
License of the code: MIT
Documentation PR: -
Replaces: #5485
This adds the missing fixes.
My only concerns is the ```\"``` removing.
```\"``` is only needed for the HTTP transport, but keeping them would require to also store the username with the escapes as well.
---------------------------------------------------------------------------
by fabpot at 2012-10-30T11:25:28Z
The digest authentication mechanism is not that widespread due to its limitation. And the transport is not HTTP, I think we are talking about very few cases.
---------------------------------------------------------------------------
by sstok at 2012-10-30T12:49:14Z
Apache seems to remove (ignore) escape characters.
```c
if (auth_line[0] == '=') {
auth_line++;
while (apr_isspace(auth_line[0])) {
auth_line++;
}
vv = 0;
if (auth_line[0] == '\"') { /* quoted string */
auth_line++;
while (auth_line[0] != '\"' && auth_line[0] != '\0') {
if (auth_line[0] == '\\' && auth_line[1] != '\0') {
auth_line++; /* escaped char */
}
value[vv++] = *auth_line++;
}
if (auth_line[0] != '\0') {
auth_line++;
}
}
else { /* token */
while (auth_line[0] != ',' && auth_line[0] != '\0'
&& !apr_isspace(auth_line[0])) {
value[vv++] = *auth_line++;
}
}
value[vv] = '\0';
}
```
But would this change be a BC break for people already using quotes but without a comma and thus they never hit this bug?
The change it self is minimum, just calling ```str_replace('\\\\', '\\', str_replace('\\"', '"', $value))``` when getting the username.
---------------------------------------------------------------------------
by fabpot at 2012-11-13T13:00:12Z
@sstok Doing the same as Apache seems the best option here (just document the BC break).
---------------------------------------------------------------------------
by sstok at 2012-11-15T16:05:00Z
Hopefully I did this correct, but the needed escapes seem correctly removed.
`\"` is changed to `"` `\\` is changed to `\`
`\'` it kept as it is, as this needs no correcting.
@Vincent-Simonin Can you verify please.
---------------------------------------------------------------------------
by Vincent-Simonin at 2012-11-19T09:28:18Z
Authentication didn't work with this configuration :
```
providers:
in_memory:
name: in_memory
users:
te"st: { password: test, roles: [ 'ROLE_USER' ] }
```
`te"st` was set in authentication form's user field.
(Must we also escape `"` in configuration file ?)
Tests were performed with nginx.
---------------------------------------------------------------------------
by sstok at 2012-11-19T09:33:34Z
Yes. YAML escapes using an duplicate quote, like SQL.
```yaml
providers:
in_memory:
name: in_memory
users:
"te""st": { password: test, roles: [ 'ROLE_USER' ] }
```
54ffd9ebfd