minio/sha256-simd provides additional acceleration for SHA256 using
AVX512, SHA Extensions for x86 and ARM64 for ARM.
It provides a drop-in replacement for crypto/sha256 and if the
extensions are not available it falls back to standard crypto/sha256.
---------
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
To avoid duplicated load of the same data in an HTTP request, we can set
a context cache to do that. i.e. Some pages may load a user from a
database with the same id in different areas on the same page. But the
code is hidden in two different deep logic. How should we share the
user? As a result of this PR, now if both entry functions accept
`context.Context` as the first parameter and we just need to refactor
`GetUserByID` to reuse the user from the context cache. Then it will not
be loaded twice on an HTTP request.
But of course, sometimes we would like to reload an object from the
database, that's why `RemoveContextData` is also exposed.
The core context cache is here. It defines a new context
```go
type cacheContext struct {
ctx context.Context
data map[any]map[any]any
lock sync.RWMutex
}
var cacheContextKey = struct{}{}
func WithCacheContext(ctx context.Context) context.Context {
return context.WithValue(ctx, cacheContextKey, &cacheContext{
ctx: ctx,
data: make(map[any]map[any]any),
})
}
```
Then you can use the below 4 methods to read/write/del the data within
the same context.
```go
func GetContextData(ctx context.Context, tp, key any) any
func SetContextData(ctx context.Context, tp, key, value any)
func RemoveContextData(ctx context.Context, tp, key any)
func GetWithContextCache[T any](ctx context.Context, cacheGroupKey string, cacheTargetID any, f func() (T, error)) (T, error)
```
Then let's take a look at how `system.GetString` implement it.
```go
func GetSetting(ctx context.Context, key string) (string, error) {
return cache.GetWithContextCache(ctx, contextCacheKey, key, func() (string, error) {
return cache.GetString(genSettingCacheKey(key), func() (string, error) {
res, err := GetSettingNoCache(ctx, key)
if err != nil {
return "", err
}
return res.SettingValue, nil
})
})
}
```
First, it will check if context data include the setting object with the
key. If not, it will query from the global cache which may be memory or
a Redis cache. If not, it will get the object from the database. In the
end, if the object gets from the global cache or database, it will be
set into the context cache.
An object stored in the context cache will only be destroyed after the
context disappeared.
Fixes #19555
Test-Instructions:
https://github.com/go-gitea/gitea/pull/21441#issuecomment-1419438000
This PR implements the mapping of user groups provided by OIDC providers
to orgs teams in Gitea. The main part is a refactoring of the existing
LDAP code to make it usable from different providers.
Refactorings:
- Moved the router auth code from module to service because of import
cycles
- Changed some model methods to take a `Context` parameter
- Moved the mapping code from LDAP to a common location
I've tested it with Keycloak but other providers should work too. The
JSON mapping format is the same as for LDAP.
---------
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
There are 2 separate flows of creating a user: authentication and source
sync.
When a group filter is defined, source sync ignores group filter, while
authentication respects it.
With this PR I've fixed this behavior, so both flows now apply this
filter when searching users in LDAP in a unified way.
- Unified LDAP group membership lookup for authentication and source
sync flows
- Replaced custom group membership lookup (used for authentication flow)
with an existing listLdapGroupMemberships method (used for source sync
flow)
- Modified listLdapGroupMemberships and getUserAttributeListedInGroup in
a way group lookup could be called separately
- Added user filtering based on a group membership for a source sync
- Added tests to cover this logic
Co-authored-by: Pavel Ezhov <paejov@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This PR adds the support for scopes of access tokens, mimicking the
design of GitHub OAuth scopes.
The changes of the core logic are in `models/auth` that `AccessToken`
struct will have a `Scope` field. The normalized (no duplication of
scope), comma-separated scope string will be stored in `access_token`
table in the database.
In `services/auth`, the scope will be stored in context, which will be
used by `reqToken` middleware in API calls. Only OAuth2 tokens will have
granular token scopes, while others like BasicAuth will default to scope
`all`.
A large amount of work happens in `routers/api/v1/api.go` and the
corresponding `tests/integration` tests, that is adding necessary scopes
to each of the API calls as they fit.
- [x] Add `Scope` field to `AccessToken`
- [x] Add access control to all API endpoints
- [x] Update frontend & backend for when creating tokens
- [x] Add a database migration for `scope` column (enable 'all' access
to past tokens)
I'm aiming to complete it before Gitea 1.19 release.
Fixes #4300
- Move the file `compare.go` and `slice.go` to `slice.go`.
- Fix `ExistsInSlice`, it's buggy
- It uses `sort.Search`, so it assumes that the input slice is sorted.
- It passes `func(i int) bool { return slice[i] == target })` to
`sort.Search`, that's incorrect, check the doc of `sort.Search`.
- Conbine `IsInt64InSlice(int64, []int64)` and `ExistsInSlice(string,
[]string)` to `SliceContains[T]([]T, T)`.
- Conbine `IsSliceInt64Eq([]int64, []int64)` and `IsEqualSlice([]string,
[]string)` to `SliceSortedEqual[T]([]T, T)`.
- Add `SliceEqual[T]([]T, T)` as a distinction from
`SliceSortedEqual[T]([]T, T)`.
- Redesign `RemoveIDFromList([]int64, int64) ([]int64, bool)` to
`SliceRemoveAll[T]([]T, T) []T`.
- Add `SliceContainsFunc[T]([]T, func(T) bool)` and
`SliceRemoveAllFunc[T]([]T, func(T) bool)` for general use.
- Add comments to explain why not `golang.org/x/exp/slices`.
- Add unit tests.
This PR changed the Auth interface signature from
`Verify(http *http.Request, w http.ResponseWriter, store DataStore, sess
SessionStore) *user_model.User`
to
`Verify(http *http.Request, w http.ResponseWriter, store DataStore, sess
SessionStore) (*user_model.User, error)`.
There is a new return argument `error` which means the verification
condition matched but verify process failed, we should stop the auth
process.
Before this PR, when return a `nil` user, we don't know the reason why
it returned `nil`. If the match condition is not satisfied or it
verified failure? For these two different results, we should have
different handler. If the match condition is not satisfied, we should
try next auth method and if there is no more auth method, it's an
anonymous user. If the condition matched but verify failed, the auth
process should be stop and return immediately.
This will fix #20563
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: Jason Song <i@wolfogre.com>
Change all license headers to comply with REUSE specification.
Fix #16132
Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
The purpose of #18982 is to improve the SMTP mailer, but there were some
unrelated changes made to the SMTP auth in
d60c438694
This PR reverts these unrelated changes, fix #21744
Only load SECRET_KEY and INTERNAL_TOKEN if they exist.
Never write the config file if the keys do not exist, which was only a fallback for Gitea upgraded from < 1.5
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This is useful in scenarios where the reverse proxy may have knowledge
of user emails, but does not know about usernames set on gitea,
as in the feature request in #19948.
I tested this by setting up a fresh gitea install with one user `mhl`
and email `m.hasnain.lakhani@gmail.com`. I then created a private repo,
and configured gitea to allow reverse proxy authentication.
Via curl I confirmed that these two requests now work and return 200s:
curl http://localhost:3000/mhl/private -I --header "X-Webauth-User: mhl"
curl http://localhost:3000/mhl/private -I --header "X-Webauth-Email: m.hasnain.lakhani@gmail.com"
Before this commit, the second request did not work.
I also verified that if I provide an invalid email or user,
a 404 is correctly returned as before
Closes #19948
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
The recovery, API, Web and package frameworks all create their own HTML
Renderers. This increases the memory requirements of Gitea
unnecessarily with duplicate templates being kept in memory.
Further the reloading framework in dev mode for these involves locking
and recompiling all of the templates on each load. This will potentially
hide concurrency issues and it is inefficient.
This PR stores the templates renderer in the context and stores this
context in the NormalRoutes, it then creates a fsnotify.Watcher
framework to watch files.
The watching framework is then extended to the mailer templates which
were previously not being reloaded in dev.
Then the locales are simplified to a similar structure.
Fix #20210
Fix #20211
Fix #20217
Signed-off-by: Andrew Thornton <art27@cantab.net>
This adds support for getting the user's full name from the reverse
proxy in addition to username and email.
Tested locally with caddy serving as reverse proxy with Tailscale
authentication.
Signed-off-by: Will Norris <will@tailscale.com>
Signed-off-by: Will Norris <will@tailscale.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
* `PROTOCOL`: can be smtp, smtps, smtp+startls, smtp+unix, sendmail, dummy
* `SMTP_ADDR`: domain for SMTP, or path to unix socket
* `SMTP_PORT`: port for SMTP; defaults to 25 for `smtp`, 465 for `smtps`, and 587 for `smtp+startls`
* `ENABLE_HELO`, `HELO_HOSTNAME`: reverse `DISABLE_HELO` to `ENABLE_HELO`; default to false + system hostname
* `FORCE_TRUST_SERVER_CERT`: replace the unclear `SKIP_VERIFY`
* `CLIENT_CERT_FILE`, `CLIENT_KEY_FILE`, `USE_CLIENT_CERT`: clarify client certificates here
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
The uid provided to the group filter must be properly escaped using the provided
ldap.EscapeFilter function.
Fix #20181
Signed-off-by: Andrew Thornton <art27@cantab.net>
Fixes #12338
This allows use to talk to the API with our ssh certificate (and/or ssh-agent) without needing to fetch an API key or tokens.
It will just automatically work when users have added their ssh principal in gitea.
This needs client code in tea
Update: also support normal pubkeys
ref: https://tools.ietf.org/html/draft-cavage-http-signatures
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>
Signed-off-by: Andrew Thornton <art27@cantab.net>
In case the binded user can not access its own attributes.
Signed-off-by: Gwilherm Folliot <gwilherm55fo@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Apply DefaultUserIsRestricted in CreateUser
* Enforce system defaults in CreateUser
Allow for overwrites with CreateUserOverwriteOptions
* Fix compilation errors
* Add "restricted" option to create user command
* Add "restricted" option to create user admin api
* Respect default setting.Service.RegisterEmailConfirm and setting.Service.RegisterManualConfirm where needed
* Revert "Respect default setting.Service.RegisterEmailConfirm and setting.Service.RegisterManualConfirm where needed"
This reverts commit ee95d3e8dc9e9fff4fa66a5111e4d3930280e033.
Unfortunately #18789 disabled autoregistration using email addresses as they would
be shortcut to email address does not exist.
This PR attempts to restore autoregistration by allowing an unknown email address
to percolate through to the autoregistration path of UserSignin.
Fix #19256
Signed-off-by: Andrew Thornton <art27@cantab.net>
* remove the global methods but create dynamiclly
* Fix lint
* Fix windows lint
* Fix windows lint
* some improvements
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Remove `db.DefaultContext` usage in routers, use `ctx` directly
* Use `ctx` directly if there is one, remove some `db.DefaultContext` in `services`
* Use ctx instead of db.DefaultContext for `cmd` and some `modules` packages
* fix incorrect context usage
`authenticator.Authenticate` has assume the login name is not an email, but `username` maybe an email. So when we find the user via email address, we should use `user.LoginName` instead of `username` which is an email address.
* Use email_address table to check user's email when login with email adress
* Update services/auth/signin.go
* Fix test
* Fix test
* Fix logging in with ldap username != loginname
* Fix if user does not exist yet
* Make more clear this is loginName
* Fix formatting
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>
* Add setting for a JSON that maps LDAP groups to Org Teams.
* Add log when removing or adding team members.
* Sync is being run on login and periodically.
* Existing group filter settings are reused.
* Adding and removing team members.
* Sync not existing LDAP group.
* Login with broken group map JSON.
* Refactor jwt.StandardClaims to RegisteredClaims
go-jwt/jwt has deprecated the StandardClaims interface to use RegisteredClaims
instead. This PR migrates to use this new format.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Apply suggestions from code review
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Migrate from U2F to Webauthn
Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
- The current implementation of `RandomString` doesn't give you a most-possible unique randomness. It gives you 6*`length` instead of the possible 8*`length` bits(or as `length`x bytes) randomness. This is because `RandomString` is being limited to a max value of 63, this in order to represent the random byte as a letter/digit.
- The recommendation of pbkdf2 is to use 64+ bit salt, which the `RandomString` doesn't give with a length of 10, instead of increasing 10 to a higher number, this patch adds a new function called `RandomBytes` which does give you the guarentee of 8*`length` randomness and thus corresponding of `length`x bytes randomness.
- Use hexadecimal to store the bytes value in the database, as mentioned, it doesn't play nice in order to convert it to a string. This will always be a length of 32(with `length` being 16).
- When we detect on `Authenticate`(source: db) that a user has the old format of salt, re-hash the password such that the user will have it's password hashed with increased salt.
Thanks to @zeripath for working out the rouge edges from my first commit 😄.
Co-authored-by: lafriks <lauris@nix.lv>
Co-authored-by: zeripath <art27@cantab.net>
* Reset Session ID on login
When logging in the SessionID should be reset and the session cleaned up.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* with new session.RegenerateID function
Signed-off-by: Andrew Thornton <art27@cantab.net>
* update go-chi/session
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Ensure that session id is changed after oauth data is set and between account linking pages too
Signed-off-by: Andrew Thornton <art27@cantab.net>
* placate lint
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per review
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Add setting to OAuth handlers to override local 2FA settings
This PR adds a setting to OAuth and OpenID login sources to allow the source to
override local 2FA requirements.
Fix #13939
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Fix regression from #16544
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Add scopes settings
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix trace logging in auth_openid
Signed-off-by: Andrew Thornton <art27@cantab.net>
* add required claim options
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Move UpdateExternalUser to externalaccount
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Allow OAuth2/OIDC to set Admin/Restricted status
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Allow use of the same group claim name for the prohibit login value
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fixup! Move UpdateExternalUser to externalaccount
* as per wxiaoguang
Signed-off-by: Andrew Thornton <art27@cantab.net>
* add label back in
Signed-off-by: Andrew Thornton <art27@cantab.net>
* adjust localisation
Signed-off-by: Andrew Thornton <art27@cantab.net>
* placate lint
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
* Move keys to models/keys
* Rename models/keys -> models/asymkey
* change the missed package name
* Fix package alias
* Fix test
* Fix docs
* Fix test
* Fix test
* merge
* Some refactors related repository model
* Move more methods out of repository
* Move repository into models/repo
* Fix test
* Fix test
* some improvements
* Remove unnecessary function
* Remove unnecessary functions of User struct
* Move more database methods out of user struct
* Move more database methods out of user struct
* Fix template failure
* Fix bug
* Remove finished FIXME
* remove unnecessary code
* Simplify Gothic to use our session store instead of creating a different store
We have been using xormstore to provide a separate session store for our OAuth2 logins
however, this relies on using gorilla context and some doubling of our session storing.
We can however, simplify and simply use our own chi-based session store. Thus removing
a cookie and some of the weirdness with missing contexts.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per review
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per review
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Handle MaxTokenLength
Signed-off-by: Andrew Thornton <art27@cantab.net>
* oops
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
* Add groups scope/claim to OICD/OAuth2
Add support for groups claim as part of the OIDC/OAuth2 flow.
Groups is a list of "org" and "org:team" strings to allow clients to
authorize based on the groups a user is part of.
Signed-off-by: Nico Schieder <code@nico-schieder.de>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Why this refactor
The goal is to move most files from `models` package to `models.xxx` package. Many models depend on avatar model, so just move this first.
And the existing logic is not clear, there are too many function like `AvatarLink`, `RelAvatarLink`, `SizedRelAvatarLink`, `SizedAvatarLink`, `MakeFinalAvatarURL`, `HashedAvatarLink`, etc. This refactor make everything clear:
* user.AvatarLink()
* user.AvatarLinkWithSize(size)
* avatars.GenerateEmailAvatarFastLink(email, size)
* avatars.GenerateEmailAvatarFinalLink(email, size)
And many duplicated code are deleted in route handler, the handler and the model share the same avatar logic now.
* Allow LDAP Sources to provide Avatars
Add setting to LDAP source to allow it to provide an Avatar.
Currently this is required to point to the image bytes.
Fix #4144
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Rename as Avatar Attribute (drop JPEG)
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Always synchronize avatar if there is change
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Actually get the avatar from the ldap
Signed-off-by: Andrew Thornton <art27@cantab.net>
* clean-up
Signed-off-by: Andrew Thornton <art27@cantab.net>
* use len()>0 rather than != ""
Signed-off-by: Andrew Thornton <art27@cantab.net>
* slight shortcut in IsUploadAvatarChanged
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
* Add SkipLocal2FA option to other pam and smtp sources
Extend #16954 to allow setting skip local 2fa on pam and SMTP authentication sources
Signed-off-by: Andrew Thornton <art27@cantab.net>
* make SkipLocal2FA omitempty
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This PR extends #16594 to allow LDAP to be able to be set to skip local 2FA too. The technique used here would be extensible to PAM and SMTP sources.
Signed-off-by: Andrew Thornton <art27@cantab.net>
If there is an error when performing the admin or restricted filter search
ensure that the filter and the userDN are reported.
Signed-off-by: Andrew Thornton <art27@cantab.net>
This PR adds a setting to OAuth and OpenID login sources to allow the source to
skip local 2FA authentication.
Fix #13939
Signed-off-by: Andrew Thornton <art27@cantab.net>
Unfortunately there is bug in #16544 meaning that openid connects aren't
being matched properly as the capitalisation in that PR is incorrect.
This PR changes the capitalisation back to what is expected.
Signed-off-by: Andrew Thornton <art27@cantab.net>
When users login and are autoregistered send email notification.
Fix #16178
* Protect public functions within the mailer by testing if the mailer is configured
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
* Improve SMTP authentication, Fix user creation bugs and add LDAP cert/key options
This PR has two parts:
Improvements for SMTP authentication:
* Default to use SMTPS if port is 465, and allow setting of force SMTPS.
* Always use STARTTLS if available
* Provide CRAM-MD5 mechanism
* Add options for HELO hostname disabling
* Add options for providing certificates and keys
* Handle application specific password response as a failed user login
instead of as a 500.
Close #16104
Fix creation of new users:
* A bug was introduced when allowing users to change usernames which
prevents the creation of external users.
* The LoginSource refactor also broke this page.
Close #16104
Signed-off-by: Andrew Thornton <art27@cantab.net>
This PR has two parts:
* Add locking to goth and gothic calls with a RWMutex
The goth and gothic calls are currently unlocked and thus are a cause of multiple potential races
* Reattempt OAuth2 registration on login if registration failed
If OAuth2 registration fails at startup we currently disable the login_source however an alternative approach could be to reattempt registration on login attempt.
Fix #16096
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Fix add authentication page
There is a regression in #16199 whereby the add authentication page
fails to react to the change in selected type.
This is due to the String() method on the LoginSourceType which is ameliorated
with an Int() function being added.
Following on from this there are a few other related bugs.
Fix #16541
Signed-off-by: Andrew Thornton <art27@cantab.net>
`models` does far too much. In particular it handles all `UserSignin`.
It shouldn't be responsible for calling LDAP, SMTP or PAM for signing in.
Therefore we should move this code out of `models`.
This code has to depend on `models` - therefore it belongs in `services`.
There is a package in `services` called `auth` and clearly this functionality belongs in there.
Plan:
- [x] Change `auth.Auth` to `auth.Method` - as they represent methods of authentication.
- [x] Move `models.UserSignIn` into `auth`
- [x] Move `models.ExternalUserLogin`
- [x] Move most of the `LoginVia*` methods to `auth` or subpackages
- [x] Move Resynchronize functionality to `auth`
- Involved some restructuring of `models/ssh_key.go` to reduce the size of this massive file and simplify its files.
- [x] Move the rest of the LDAP functionality in to the ldap subpackage
- [x] Re-factor the login sources to express an interfaces `auth.Source`?
- I've done this through some smaller interfaces Authenticator and Synchronizable - which would allow us to extend things in future
- [x] Now LDAP is out of models - need to think about modules/auth/ldap and I think all of that functionality might just be moveable
- [x] Similarly a lot Oauth2 functionality need not be in models too and should be moved to services/auth/source/oauth2
- [x] modules/auth/oauth2/oauth2.go uses xorm... This is naughty - probably need to move this into models.
- [x] models/oauth2.go - mostly should be in modules/auth/oauth2 or services/auth/source/oauth2
- [x] More simplifications of login_source.go may need to be done
- Allow wiring in of notify registration - *this can now easily be done - but I think we should do it in another PR* - see #16178
- More refactors...?
- OpenID should probably become an auth Method but I think that can be left for another PR
- Methods should also probably be cleaned up - again another PR I think.
- SSPI still needs more refactors.* Rename auth.Auth auth.Method
* Restructure ssh_key.go
- move functions from models/user.go that relate to ssh_key to ssh_key
- split ssh_key.go to try create clearer function domains for allow for
future refactors here.
Signed-off-by: Andrew Thornton <art27@cantab.net>
