This PR is a refactor at the beginning. And now it did 4 things.
- [x] Move renaming organizaiton and user logics into services layer and
merged as one function
- [x] Support rename a user capitalization only. For example, rename the
user from `Lunny` to `lunny`. We just need to change one table `user`
and others should not be touched.
- [x] Before this PR, some renaming were missed like `agit`
- [x] Fix bug the API reutrned from `http.StatusNoContent` to `http.StatusOK`
Replace #16455Close#21803
Mixing different Gitea contexts together causes some problems:
1. Unable to respond proper content when error occurs, eg: Web should
respond HTML while API should respond JSON
2. Unclear dependency, eg: it's unclear when Context is used in
APIContext, which fields should be initialized, which methods are
necessary.
To make things clear, this PR introduces a Base context, it only
provides basic Req/Resp/Data features.
This PR mainly moves code. There are still many legacy problems and
TODOs in code, leave unrelated changes to future PRs.
This PR
- [x] Move some functions from `issues.go` to `issue_stats.go` and
`issue_label.go`
- [x] Remove duplicated issue options `UserIssueStatsOption` to keep
only one `IssuesOptions`
This PR is to allow users to specify status checks by patterns. Users
can enter patterns in the "Status Check Pattern" `textarea` to match
status checks and each line specifies a pattern. If "Status Check" is
enabled, patterns cannot be empty and user must enter at least one
pattern.
Users will no longer be able to choose status checks from the table. But
a __*`Matched`*__ mark will be added to the matched checks to help users
enter patterns.
Benefits:
- Even if no status checks have been completed, users can specify
necessary status checks in advance.
- More flexible. Users can specify a series of status checks by one
pattern.
Before:
![image](https://github.com/go-gitea/gitea/assets/15528715/635738ad-580c-49cd-941d-c721e5b99be4)
After:
![image](https://github.com/go-gitea/gitea/assets/15528715/16aa7b1b-abf1-4170-9bfa-ae6fc9803a82)
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-author: @pboguslawski
"registration success email" is only used for notifying a user that "you
have a new account now" when the account is created by admin manually.
When a user uses external auth source, they already knows that they has
the account, so do not send such email.
Co-authored-by: Giteabot <teabot@gitea.io>
The `GetAllCommits` endpoint can be pretty slow, especially in repos
with a lot of commits. The issue is that it spends a lot of time
calculating information that may not be useful/needed by the user.
The `stat` param was previously added in #21337 to address this, by
allowing the user to disable the calculating stats for each commit. But
this has two issues:
1. The name `stat` is rather misleading, because disabling `stat`
disables the Stat **and** Files. This should be separated out into two
different params, because getting a list of affected files is much less
expensive than calculating the stats
2. There's still other costly information provided that the user may not
need, such as `Verification`
This PR, adds two parameters to the endpoint, `files` and `verification`
to allow the user to explicitly disable this information when listing
commits. The default behavior is true.
1. Remove unused fields/methods in web context.
2. Make callers call target function directly instead of the light
wrapper like "IsUserRepoReaderSpecific"
3. The "issue template" code shouldn't be put in the "modules/context"
package, so move them to the service package.
---------
Co-authored-by: Giteabot <teabot@gitea.io>
# ⚠️ Breaking
Many deprecated queue config options are removed (actually, they should
have been removed in 1.18/1.19).
If you see the fatal message when starting Gitea: "Please update your
app.ini to remove deprecated config options", please follow the error
messages to remove these options from your app.ini.
Example:
```
2023/05/06 19:39:22 [E] Removed queue option: `[indexer].ISSUE_INDEXER_QUEUE_TYPE`. Use new options in `[queue.issue_indexer]`
2023/05/06 19:39:22 [E] Removed queue option: `[indexer].UPDATE_BUFFER_LEN`. Use new options in `[queue.issue_indexer]`
2023/05/06 19:39:22 [F] Please update your app.ini to remove deprecated config options
```
Many options in `[queue]` are are dropped, including:
`WRAP_IF_NECESSARY`, `MAX_ATTEMPTS`, `TIMEOUT`, `WORKERS`,
`BLOCK_TIMEOUT`, `BOOST_TIMEOUT`, `BOOST_WORKERS`, they can be removed
from app.ini.
# The problem
The old queue package has some legacy problems:
* complexity: I doubt few people could tell how it works.
* maintainability: Too many channels and mutex/cond are mixed together,
too many different structs/interfaces depends each other.
* stability: due to the complexity & maintainability, sometimes there
are strange bugs and difficult to debug, and some code doesn't have test
(indeed some code is difficult to test because a lot of things are mixed
together).
* general applicability: although it is called "queue", its behavior is
not a well-known queue.
* scalability: it doesn't seem easy to make it work with a cluster
without breaking its behaviors.
It came from some very old code to "avoid breaking", however, its
technical debt is too heavy now. It's a good time to introduce a better
"queue" package.
# The new queue package
It keeps using old config and concept as much as possible.
* It only contains two major kinds of concepts:
* The "base queue": channel, levelqueue, redis
* They have the same abstraction, the same interface, and they are
tested by the same testing code.
* The "WokerPoolQueue", it uses the "base queue" to provide "worker
pool" function, calls the "handler" to process the data in the base
queue.
* The new code doesn't do "PushBack"
* Think about a queue with many workers, the "PushBack" can't guarantee
the order for re-queued unhandled items, so in new code it just does
"normal push"
* The new code doesn't do "pause/resume"
* The "pause/resume" was designed to handle some handler's failure: eg:
document indexer (elasticsearch) is down
* If a queue is paused for long time, either the producers blocks or the
new items are dropped.
* The new code doesn't do such "pause/resume" trick, it's not a common
queue's behavior and it doesn't help much.
* If there are unhandled items, the "push" function just blocks for a
few seconds and then re-queue them and retry.
* The new code doesn't do "worker booster"
* Gitea's queue's handlers are light functions, the cost is only the
go-routine, so it doesn't make sense to "boost" them.
* The new code only use "max worker number" to limit the concurrent
workers.
* The new "Push" never blocks forever
* Instead of creating more and more blocking goroutines, return an error
is more friendly to the server and to the end user.
There are more details in code comments: eg: the "Flush" problem, the
strange "code.index" hanging problem, the "immediate" queue problem.
Almost ready for review.
TODO:
* [x] add some necessary comments during review
* [x] add some more tests if necessary
* [x] update documents and config options
* [x] test max worker / active worker
* [x] re-run the CI tasks to see whether any test is flaky
* [x] improve the `handleOldLengthConfiguration` to provide more
friendly messages
* [x] fine tune default config values (eg: length?)
## Code coverage:
![image](https://user-images.githubusercontent.com/2114189/236620635-55576955-f95d-4810-b12f-879026a3afdf.png)
Close#24213
Replace #23830
#### Cause
- Before, in order to making PR can get latest commit after reopening,
the `ref`(${REPO_PATH}/refs/pull/${PR_INDEX}/head) of evrey closed PR
will be updated when pushing commits to the `head branch` of the closed
PR.
#### Changes
- For closed PR , won't perform these behavior: insert`comment`, push
`notification` (UI and email), exectue
[pushToBaseRepo](7422503341/services/pull/pull.go (L409))
function and trigger `action` any more when pushing to the `head branch`
of the closed PR.
- Refresh the reference of the PR when reopening the closed PR (**even
if the head branch has been deleted before**). Make the reference of PR
consistent with the `head branch`.
The `..` should be covered by TestUserTitleToWebPath.
Otherwise, if the random string is "..", it causes unnecessary failure
in TestUserWebGitPathConsistency
Since the login form label for user_name unconditionally displays
`Username or Email Address` for the `user_name` field, bring matching
LDAP filters to more prominence in the documentation/placeholders.
Signed-off-by: Gary Moon <gary@garymoon.net>
Partially for #24457
Major changes:
1. The old `signedUserNameStringPointerKey` is quite hacky, use
`ctx.Data[SignedUser]` instead
2. Move duplicate code from `Contexter` to `CommonTemplateContextData`
3. Remove incorrect copying&pasting code `ctx.Data["Err_Password"] =
true` in API handlers
4. Use one unique `RenderPanicErrorPage` for panic error page rendering
5. Move `stripSlashesMiddleware` to be the first middleware
6. Install global panic recovery handler, it works for both `install`
and `web`
7. Make `500.tmpl` only depend minimal template functions/variables,
avoid triggering new panics
Screenshot:
<details>
![image](https://user-images.githubusercontent.com/2114189/235444895-cecbabb8-e7dc-4360-a31c-b982d11946a7.png)
</details>
Add ntlm authentication support for mail
use "github.com/Azure/go-ntlmssp"
---------
Co-authored-by: yangtan_win <YangTan@Fitsco.com.cn>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: @awkwardbunny
This PR adds a Debian package registry. You can follow [this
tutorial](https://www.baeldung.com/linux/create-debian-package) to build
a *.deb package for testing. Source packages are not supported at the
moment and I did not find documentation of the architecture "all" and
how these packages should be treated.
---------
Co-authored-by: Brian Hong <brian@hongs.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
There was only one `IsRepositoryExist` function, it did: `has && isDir`
However it's not right, and it would cause 500 error when creating a new
repository if the dir exists.
Then, it was changed to `has || isDir`, it is still incorrect, it
affects the "adopt repo" logic.
To make the logic clear:
* IsRepositoryModelOrDirExist
* IsRepositoryModelExist
Fix https://github.com/go-gitea/gitea/pull/24362/files#r1179095324
`getAuthenticatedMeta` has checked them, these code are duplicated one.
And the first invokation has a wrong permission check. `DownloadHandle`
should require read permission but not write.
> The scoped token PR just checked all API routes but in fact, some web
routes like `LFS`, git `HTTP`, container, and attachments supports basic
auth. This PR added scoped token check for them.
---------
Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
The Infinite Monkey Random Typing catches a bug, inconsistent wiki path
converting.
Close#24276
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>
- Update all tool dependencies to latest tag
- Remove unused errcheck, it is part of golangci-lint
- Include main.go in air
- Enable wastedassign again now that it's
[generics-compatible](https://github.com/golangci/golangci-lint/pull/3689)
- Restructured lint targets to new `lint-*` namespace
Before, there was a `log/buffer.go`, but that design is not general, and
it introduces a lot of irrelevant `Content() (string, error) ` and
`return "", fmt.Errorf("not supported")` .
And the old `log/buffer.go` is difficult to use, developers have to
write a lot of `Contains` and `Sleep` code.
The new `LogChecker` is designed to be a general approach to help to
assert some messages appearing or not appearing in logs.
Close#24195
Some of the changes are taken from my another fix
f07b0de997
in #20147 (although that PR was discarded ....)
The bug is:
1. The old code doesn't handle `removedfile` event correctly
2. The old code doesn't provide attachments for type=CommentTypeReview
This PR doesn't intend to refactor the "upload" code to a perfect state
(to avoid making the review difficult), so some legacy styles are kept.
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>
Close#7570
1. Clearly define the wiki path behaviors, see
`services/wiki/wiki_path.go` and tests
2. Keep compatibility with old contents
3. Allow to use dashes in titles, eg: "2000-01-02 Meeting record"
4. Add a "Pages" link in the dropdown, otherwise users can't go to the
Pages page easily.
5. Add a "View original git file" link in the Pages list, even if some
file names are broken, users still have a chance to edit or remove it,
without cloning the wiki repo to local.
6. Fix 500 error when the name contains prefix spaces.
This PR also introduces the ability to support sub-directories, but it
can't be done at the moment due to there are a lot of legacy wiki data,
which use "%2F" in file names.
![image](https://user-images.githubusercontent.com/2114189/232239004-3359d7b9-7bf3-4ff3-8446-bfb0e79645dd.png)
![image](https://user-images.githubusercontent.com/2114189/232239020-74b92c72-bf73-4377-a319-1c85609f82b1.png)
Co-authored-by: Giteabot <teabot@gitea.io>
This allows for usernames, and emails connected to them to be reserved
and not reused.
Use case, I manage an instance with open registration, and sometimes
when users are deleted for spam (or other purposes), their usernames are
freed up and they sign up again with the same information.
This could also be used to reserve usernames, and block them from being
registered (in case an instance would like to block certain things
without hardcoding the list in code and compiling from scratch).
This is an MVP, that will allow for future work where you can set
something as reserved via the interface.
---------
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Close#24062
At the beginning, I just wanted to fix the warning mentioned by #24062
But, the cookie code really doesn't look good to me, so clean up them.
Complete the TODO on `SetCookie`:
> TODO: Copied from gitea.com/macaron/macaron and should be improved
after macaron removed.
In the `for` loop, the value of `membershipsToAdd[org]` and
`membershipsToRemove[org]` is a slice that should be appended instead of
overwritten.
Due to the current overwrite, the LDAP group sync only matches the last
group at the moment.
## Example reproduction
- an LDAP user is both a member of
`cn=admin_staff,ou=people,dc=planetexpress,dc=com` and
`cn=ship_crew,ou=people,dc=planetexpress,dc=com`.
- configuration of `Map LDAP groups to Organization teams ` in
`Authentication Sources`:
```json
{
"cn=admin_staff,ou=people,dc=planetexpress,dc=com":{
"test_organization":[
"admin_staff",
"test_add"
]
},
"cn=ship_crew,ou=people,dc=planetexpress,dc=com":{
"test_organization":[
"ship_crew"
]
}
```
- start `Synchronize external user data` task in the `Dashboard`.
- the user was only added for the team `test_organization.ship_crew`
None of the features of `unrolled/render` package is used.
The Golang builtin "html/template" just works well. Then we can improve
our HTML render to resolve the "$.root.locale.Tr" problem as much as
possible.
Next step: we can have a template render pool (by Clone), then we can
inject global functions with dynamic context to every `Execute` calls.
Then we can use `{{Locale.Tr ....}}` directly in all templates , no need
to pass the `$.root.locale` again and again.
Currently using the tip of main
(2c585d62a4) and when deleting a branch
(and presumably tag, but not tested), no workflows with `on: [delete]`
are being triggered. The runner isn't being notified about them. I see
this in the gitea log:
`2023/04/04 04:29:36 ...s/notifier_helper.go:102:Notify() [E] an error
occurred while executing the NotifyDeleteRef actions method:
gitRepo.GetCommit: object does not exist [id: test, rel_path: ]`
Understandably the ref has already been deleted and so `GetCommit`
fails. Currently at
https://github.com/go-gitea/gitea/blob/main/services/actions/notifier_helper.go#L130,
if the ref is an empty string it falls back to the default branch name.
This PR also checks if it is a `HookEventDelete` and does the same.
Currently `${{ github.ref }}` would be equivalent to the deleted branch
(if `notify()` succeded), but this PR allows `notify()` to proceed and
also aligns it with the GitHub Actions behavior at
https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#delete:
`$GITHUB_REF` / `${{ github.ref }}` => Default branch (main/master)
`$GITHUB_SHA` / `${{ github.sha }}` => Last commit on default branch
If the user needs the name of the deleted branch (or tag), it is
available as `${{ github.event.ref }}`.
There appears to be no way for the user to get the tip commit SHA of the
deleted branch (GitHub does not do this either).
N.B. there may be other conditions other than `HookEventDelete` where
the default branch ref needs swapped in, but this was sufficient for my
use case.
Previously, deleted release attachments were kept forever on the
external storage.
Note: It may be very slow now if there are many attachments to be
deleted on this release.
Fix#23728
There is no fork concept in agit flow, anyone with read permission can
push `refs/for/<target-branch>/<topic-branch>` to the repo. So we should
treat it as a fork pull request because it may be from an untrusted
user.
When running listLdapGroupMemberships check if the groupFilter is empty
before using it to list memberships.
Fix#23615
Signed-off-by: Andrew Thornton <art27@cantab.net>
Adds API endpoints to manage issue/PR dependencies
* `GET /repos/{owner}/{repo}/issues/{index}/blocks` List issues that are
blocked by this issue
* `POST /repos/{owner}/{repo}/issues/{index}/blocks` Block the issue
given in the body by the issue in path
* `DELETE /repos/{owner}/{repo}/issues/{index}/blocks` Unblock the issue
given in the body by the issue in path
* `GET /repos/{owner}/{repo}/issues/{index}/dependencies` List an
issue's dependencies
* `POST /repos/{owner}/{repo}/issues/{index}/dependencies` Create a new
issue dependencies
* `DELETE /repos/{owner}/{repo}/issues/{index}/dependencies` Remove an
issue dependency
Closes https://github.com/go-gitea/gitea/issues/15393Closes#22115
Co-authored-by: Andrew Thornton <art27@cantab.net>
`HookEventType` of pull request review comments should be
`HookEventPullRequestReviewComment` but some event types are
`HookEventPullRequestComment` now.
Since #23493 has conflicts with latest commits, this PR is my proposal
for fixing #23371
Details are in the comments
And refactor the `modules/options` module, to make it always use
"filepath" to access local files.
Benefits:
* No need to do `util.CleanPath(strings.ReplaceAll(p, "\\", "/"))),
"/")` any more (not only one before)
* The function behaviors are clearly defined
Close#23440
Cause by #23189
In #23189, we should insert a comment record into db when pushing a
commit to the PR, even if the PR is closed.
But should skip sending any notification in this case.
---------
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
this is a simple endpoint that adds the ability to rename users to the
admin API.
Note: this is not in a mergeable state. It would be better if this was
handled by a PATCH/POST to the /api/v1/admin/users/{username} endpoint
and the username is modified.
---------
Co-authored-by: Jason Song <i@wolfogre.com>
When creating attachments (issue, release, repo) the file size (being
part of the multipart file header) is passed through the chain of
creating an attachment to ensure the MinIO client can stream the file
directly instead of having to read it to memory completely at first.
Fixes#23393
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Fixes https://github.com/go-gitea/gitea/issues/22676
Context Data `IsOrganizationMember` and `IsOrganizationOwner` is used to
control the visibility of `people` and `team` tab.
2871ea0809/templates/org/menu.tmpl (L19-L40)
And because of the reuse of user projects page, User Context is changed
to Organization Context. But the value of `IsOrganizationMember` and
`IsOrganizationOwner` are not being given.
I reused func `HandleOrgAssignment` to add them to the ctx, but may have
some unnecessary variables, idk whether it is ok.
I found there is a missing `PageIsViewProjects` at create project page.
When there is an error creating a new openIDConnect authentication
source try to handle the error a little better.
Close#23283
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
When emails addresses are private, squash merges always use
`@noreply.localhost` for the author of the squash commit. And the author
is redundantly added as a co-author in the commit message.
Also without private mails, the redundant co-author is possible when
committing with a signature that's different than the user full name and
primary email.
Now try to find a commit by the same user in the list of commits, and
prefer the signature from that over one constructed from the account
settings.
When the base repository contains multiple branches with the same
commits as the base branch, pull requests can show a long list of
commits already in the base branch as having been added.
What this is supposed to do is exclude commits already in the base
branch. But the mechansim to do so assumed a commit only exists in a
single branch. Now use `git rev-list A B --not branchName` instead of
filtering commits afterwards.
The logic to detect if there was a force push also was wrong for
multiple branches. If the old commit existed in any branch in the base
repository it would assume there was no force push. Instead check if the
old commit is an ancestor of the new commit.
Follow #22568
* Remove unnecessary ToTrustedCmdArgs calls
* the FAQ in #22678
* Quote: When using ToTrustedCmdArgs, the code will be very complex (see
the changes for examples). Then developers and reviewers can know that
something might be unreasonable.
* The `signArg` couldn't be empty, it's either `-S{keyID}` or
`--no-gpg-sign`.
* Use `signKeyID` instead, add comment "empty for no-sign, non-empty to
sign"
* 5-line code could be extracted to a common `NewGitCommandCommit()` to
handle the `signKeyID`, but I think it's not a must, current code is
clear enough.
Related to: #22294#23186#23054
Replace: #23218
Some discussion is in the comments of #23218.
Highlights:
- Add Expiration for cache context. If a cache context has been used for
more than 10s, the cache data will be ignored, and warning logs will be
printed.
- Add `discard` field to `cacheContext`, a `cacheContext` with `discard`
true will drop all cached data and won't store any new one.
- Introduce `WithNoCacheContext`, if one wants to run long-life tasks,
but the parent context is a cache context,
`WithNoCacheContext(perentCtx)` will discard the cache data, so it will
be safe to keep the context for a long time.
- It will be fine to treat an original context as a cache context, like
`GetContextData(context.Backgraud())`, no warning logs will be printed.
Some cases about nesting:
When:
- *A*, *B* or *C* means a cache context.
- ~*A*~, ~*B*~ or ~*C*~ means a discard cache context.
- `ctx` means `context.Backgrand()`
- *A(ctx)* means a cache context with `ctx` as the parent context.
- *B(A(ctx))* means a cache context with `A(ctx)` as the parent context.
- `With` means `WithCacheContext`
- `WithNo` means `WithNoCacheContext`
So:
- `With(ctx)` -> *A(ctx)*
- `With(With(ctx))` -> *A(ctx)*, not *B(A(ctx))*
- `With(With(With(ctx)))` -> *A(ctx)*, not *C(B(A(ctx)))*
- `WithNo(ctx)` -> *ctx*, not *~A~(ctx)*
- `WithNo(With(ctx))` -> *~A~(ctx)*
- `WithNo(WithNo(With(ctx)))` -> *~A~(ctx)*, not *~B~(~A~(ctx))*
- `With(WithNo(With(ctx)))` -> *B(~A~(ctx))*
- `WithNo(With(WithNo(With(ctx))))` -> *~B~(~A~(ctx))*
- `With(WithNo(With(WithNo(With(ctx)))))` -> *C(~B~(~A~(ctx)))*
The merge and update branch code was previously a little tangled and had
some very long functions. The functions were not very clear in their
reasoning and there were deficiencies in their logging and at least one
bug in the handling of LFS for update by rebase.
This PR substantially refactors this code and splits things out to into
separate functions. It also attempts to tidy up the calls by wrapping
things in "context"s. There are also attempts to improve logging when
there are errors.
Signed-off-by: Andrew Thornton <art27@cantab.net>
---------
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: delvh <dev.lh@web.de>
Close#23241
Before: press Ctrl+Enter in the Code Review Form, a single comment will
be added.
After: press Ctrl+Enter in the Code Review Form, start the review with
pending comments.
The old name `is_review` is not clear, so the new code use
`pending_review` as the new name.
Co-authored-by: delvh <leon@kske.dev>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
When creating commit status for Actons jobs, a payload with nil
`HeadCommit` will cause panic.
Reported at:
https://gitea.com/gitea/act_runner/issues/28#issuecomment-732166
Although the `HeadCommit` probably can not be nil after #23215,
`CreateCommitStatus` should protect itself, to avoid being broken in the
future.
In addition, it's enough to print error log instead of returning err
when `CreateCommitStatus` failed.
---------
Co-authored-by: delvh <dev.lh@web.de>
Extract from #11669 and enhancement to #22585 to support exclusive
scoped labels in label templates
* Move label template functionality to label module
* Fix handling of color codes
* Add Advanced label template
When fetching remotes for conflict checking, skip unnecessary and
potentially slow writing of commit graphs.
In a test with the Blender repository, this reduces conflict checking
time for one pull request from about 2s to 0.1s.
Fix: #22990
---
Before, the return value of the api is always false,regrardless of
whether the entry of `sync_on_commit` is true or false.
I have confirmed that the value of `sync_on_commit` dropped into the
database is correct.
So, I think it is enough to make some small changes.
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.
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Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>