mirror of
https://github.com/go-gitea/gitea
synced 2024-06-01 00:45:46 +00:00
bd820aa9c5
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.
390 lines
11 KiB
Go
390 lines
11 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package asymkey
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import (
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"context"
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"fmt"
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"strings"
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asymkey_model "code.gitea.io/gitea/models/asymkey"
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"code.gitea.io/gitea/models/auth"
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"code.gitea.io/gitea/models/db"
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git_model "code.gitea.io/gitea/models/git"
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issues_model "code.gitea.io/gitea/models/issues"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/setting"
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)
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type signingMode string
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const (
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never signingMode = "never"
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always signingMode = "always"
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pubkey signingMode = "pubkey"
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twofa signingMode = "twofa"
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parentSigned signingMode = "parentsigned"
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baseSigned signingMode = "basesigned"
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headSigned signingMode = "headsigned"
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commitsSigned signingMode = "commitssigned"
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approved signingMode = "approved"
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noKey signingMode = "nokey"
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)
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func signingModeFromStrings(modeStrings []string) []signingMode {
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returnable := make([]signingMode, 0, len(modeStrings))
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for _, mode := range modeStrings {
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signMode := signingMode(strings.ToLower(strings.TrimSpace(mode)))
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switch signMode {
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case never:
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return []signingMode{never}
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case always:
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return []signingMode{always}
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case pubkey:
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fallthrough
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case twofa:
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fallthrough
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case parentSigned:
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fallthrough
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case baseSigned:
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fallthrough
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case headSigned:
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fallthrough
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case approved:
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fallthrough
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case commitsSigned:
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returnable = append(returnable, signMode)
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}
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}
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if len(returnable) == 0 {
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return []signingMode{never}
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}
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return returnable
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}
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// ErrWontSign explains the first reason why a commit would not be signed
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// There may be other reasons - this is just the first reason found
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type ErrWontSign struct {
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Reason signingMode
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}
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func (e *ErrWontSign) Error() string {
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return fmt.Sprintf("wont sign: %s", e.Reason)
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}
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// IsErrWontSign checks if an error is a ErrWontSign
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func IsErrWontSign(err error) bool {
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_, ok := err.(*ErrWontSign)
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return ok
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}
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// SigningKey returns the KeyID and git Signature for the repo
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func SigningKey(ctx context.Context, repoPath string) (string, *git.Signature) {
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if setting.Repository.Signing.SigningKey == "none" {
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return "", nil
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}
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if setting.Repository.Signing.SigningKey == "default" || setting.Repository.Signing.SigningKey == "" {
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// Can ignore the error here as it means that commit.gpgsign is not set
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value, _, _ := git.NewCommand(ctx, "config", "--get", "commit.gpgsign").RunStdString(&git.RunOpts{Dir: repoPath})
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sign, valid := git.ParseBool(strings.TrimSpace(value))
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if !sign || !valid {
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return "", nil
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}
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signingKey, _, _ := git.NewCommand(ctx, "config", "--get", "user.signingkey").RunStdString(&git.RunOpts{Dir: repoPath})
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signingName, _, _ := git.NewCommand(ctx, "config", "--get", "user.name").RunStdString(&git.RunOpts{Dir: repoPath})
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signingEmail, _, _ := git.NewCommand(ctx, "config", "--get", "user.email").RunStdString(&git.RunOpts{Dir: repoPath})
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return strings.TrimSpace(signingKey), &git.Signature{
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Name: strings.TrimSpace(signingName),
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Email: strings.TrimSpace(signingEmail),
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}
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}
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return setting.Repository.Signing.SigningKey, &git.Signature{
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Name: setting.Repository.Signing.SigningName,
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Email: setting.Repository.Signing.SigningEmail,
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}
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}
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// PublicSigningKey gets the public signing key within a provided repository directory
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func PublicSigningKey(ctx context.Context, repoPath string) (string, error) {
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signingKey, _ := SigningKey(ctx, repoPath)
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if signingKey == "" {
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return "", nil
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}
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content, stderr, err := process.GetManager().ExecDir(ctx, -1, repoPath,
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"gpg --export -a", "gpg", "--export", "-a", signingKey)
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if err != nil {
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log.Error("Unable to get default signing key in %s: %s, %s, %v", repoPath, signingKey, stderr, err)
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return "", err
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}
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return content, nil
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}
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// SignInitialCommit determines if we should sign the initial commit to this repository
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func SignInitialCommit(ctx context.Context, repoPath string, u *user_model.User) (bool, string, *git.Signature, error) {
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rules := signingModeFromStrings(setting.Repository.Signing.InitialCommit)
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signingKey, sig := SigningKey(ctx, repoPath)
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if signingKey == "" {
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return false, "", nil, &ErrWontSign{noKey}
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}
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Loop:
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for _, rule := range rules {
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switch rule {
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case never:
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return false, "", nil, &ErrWontSign{never}
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case always:
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break Loop
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case pubkey:
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keys, err := asymkey_model.ListGPGKeys(ctx, u.ID, db.ListOptions{})
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if err != nil {
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return false, "", nil, err
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}
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if len(keys) == 0 {
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return false, "", nil, &ErrWontSign{pubkey}
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}
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case twofa:
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twofaModel, err := auth.GetTwoFactorByUID(u.ID)
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if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
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return false, "", nil, err
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}
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if twofaModel == nil {
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return false, "", nil, &ErrWontSign{twofa}
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}
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}
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}
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return true, signingKey, sig, nil
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}
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// SignWikiCommit determines if we should sign the commits to this repository wiki
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func SignWikiCommit(ctx context.Context, repoWikiPath string, u *user_model.User) (bool, string, *git.Signature, error) {
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rules := signingModeFromStrings(setting.Repository.Signing.Wiki)
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signingKey, sig := SigningKey(ctx, repoWikiPath)
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if signingKey == "" {
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return false, "", nil, &ErrWontSign{noKey}
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}
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Loop:
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for _, rule := range rules {
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switch rule {
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case never:
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return false, "", nil, &ErrWontSign{never}
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case always:
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break Loop
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case pubkey:
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keys, err := asymkey_model.ListGPGKeys(ctx, u.ID, db.ListOptions{})
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if err != nil {
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return false, "", nil, err
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}
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if len(keys) == 0 {
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return false, "", nil, &ErrWontSign{pubkey}
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}
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case twofa:
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twofaModel, err := auth.GetTwoFactorByUID(u.ID)
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if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
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return false, "", nil, err
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}
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if twofaModel == nil {
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return false, "", nil, &ErrWontSign{twofa}
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}
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case parentSigned:
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gitRepo, err := git.OpenRepository(ctx, repoWikiPath)
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if err != nil {
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return false, "", nil, err
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}
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defer gitRepo.Close()
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commit, err := gitRepo.GetCommit("HEAD")
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if err != nil {
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return false, "", nil, err
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}
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if commit.Signature == nil {
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return false, "", nil, &ErrWontSign{parentSigned}
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}
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{parentSigned}
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}
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}
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}
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return true, signingKey, sig, nil
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}
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// SignCRUDAction determines if we should sign a CRUD commit to this repository
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func SignCRUDAction(ctx context.Context, repoPath string, u *user_model.User, tmpBasePath, parentCommit string) (bool, string, *git.Signature, error) {
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rules := signingModeFromStrings(setting.Repository.Signing.CRUDActions)
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signingKey, sig := SigningKey(ctx, repoPath)
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if signingKey == "" {
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return false, "", nil, &ErrWontSign{noKey}
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}
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Loop:
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for _, rule := range rules {
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switch rule {
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case never:
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return false, "", nil, &ErrWontSign{never}
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case always:
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break Loop
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case pubkey:
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keys, err := asymkey_model.ListGPGKeys(ctx, u.ID, db.ListOptions{})
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if err != nil {
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return false, "", nil, err
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}
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if len(keys) == 0 {
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return false, "", nil, &ErrWontSign{pubkey}
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}
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case twofa:
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twofaModel, err := auth.GetTwoFactorByUID(u.ID)
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if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
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return false, "", nil, err
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}
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if twofaModel == nil {
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return false, "", nil, &ErrWontSign{twofa}
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}
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case parentSigned:
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gitRepo, err := git.OpenRepository(ctx, tmpBasePath)
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if err != nil {
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return false, "", nil, err
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}
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defer gitRepo.Close()
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commit, err := gitRepo.GetCommit(parentCommit)
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if err != nil {
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return false, "", nil, err
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}
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if commit.Signature == nil {
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return false, "", nil, &ErrWontSign{parentSigned}
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}
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{parentSigned}
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}
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}
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}
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return true, signingKey, sig, nil
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}
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// SignMerge determines if we should sign a PR merge commit to the base repository
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func SignMerge(ctx context.Context, pr *issues_model.PullRequest, u *user_model.User, tmpBasePath, baseCommit, headCommit string) (bool, string, *git.Signature, error) {
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if err := pr.LoadBaseRepo(ctx); err != nil {
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log.Error("Unable to get Base Repo for pull request")
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return false, "", nil, err
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}
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repo := pr.BaseRepo
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signingKey, signer := SigningKey(ctx, repo.RepoPath())
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if signingKey == "" {
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return false, "", nil, &ErrWontSign{noKey}
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}
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rules := signingModeFromStrings(setting.Repository.Signing.Merges)
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var gitRepo *git.Repository
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var err error
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Loop:
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for _, rule := range rules {
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switch rule {
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case never:
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return false, "", nil, &ErrWontSign{never}
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case always:
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break Loop
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case pubkey:
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keys, err := asymkey_model.ListGPGKeys(ctx, u.ID, db.ListOptions{})
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if err != nil {
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return false, "", nil, err
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}
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if len(keys) == 0 {
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return false, "", nil, &ErrWontSign{pubkey}
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}
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case twofa:
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twofaModel, err := auth.GetTwoFactorByUID(u.ID)
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if err != nil && !auth.IsErrTwoFactorNotEnrolled(err) {
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return false, "", nil, err
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}
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if twofaModel == nil {
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return false, "", nil, &ErrWontSign{twofa}
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}
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case approved:
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protectedBranch, err := git_model.GetFirstMatchProtectedBranchRule(ctx, repo.ID, pr.BaseBranch)
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if err != nil {
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return false, "", nil, err
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}
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if protectedBranch == nil {
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return false, "", nil, &ErrWontSign{approved}
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}
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if issues_model.GetGrantedApprovalsCount(ctx, protectedBranch, pr) < 1 {
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return false, "", nil, &ErrWontSign{approved}
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}
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case baseSigned:
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if gitRepo == nil {
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gitRepo, err = git.OpenRepository(ctx, tmpBasePath)
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if err != nil {
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return false, "", nil, err
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}
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defer gitRepo.Close()
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}
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commit, err := gitRepo.GetCommit(baseCommit)
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if err != nil {
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return false, "", nil, err
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}
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{baseSigned}
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}
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case headSigned:
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if gitRepo == nil {
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gitRepo, err = git.OpenRepository(ctx, tmpBasePath)
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if err != nil {
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return false, "", nil, err
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}
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defer gitRepo.Close()
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}
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commit, err := gitRepo.GetCommit(headCommit)
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if err != nil {
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return false, "", nil, err
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}
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{headSigned}
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}
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case commitsSigned:
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if gitRepo == nil {
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gitRepo, err = git.OpenRepository(ctx, tmpBasePath)
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if err != nil {
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return false, "", nil, err
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}
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defer gitRepo.Close()
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}
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commit, err := gitRepo.GetCommit(headCommit)
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if err != nil {
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return false, "", nil, err
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}
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{commitsSigned}
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}
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// need to work out merge-base
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mergeBaseCommit, _, err := gitRepo.GetMergeBase("", baseCommit, headCommit)
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if err != nil {
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return false, "", nil, err
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}
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commitList, err := commit.CommitsBeforeUntil(mergeBaseCommit)
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if err != nil {
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return false, "", nil, err
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}
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for _, commit := range commitList {
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verification := asymkey_model.ParseCommitWithSignature(ctx, commit)
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if !verification.Verified {
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return false, "", nil, &ErrWontSign{commitsSigned}
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}
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}
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}
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}
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return true, signingKey, signer, nil
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}
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