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// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// Package private includes all internal routes. The package name internal is ideal but Golang is not allowed, so we use private as package name instead.
package private
import (
"bufio"
"context"
"fmt"
"io"
"os"
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asymkey_model "code.gitea.io/gitea/models/asymkey"
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"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// _________ .__ __
// \_ ___ \ ____ _____ _____ |__|/ |_
// / \ \/ / _ \ / \ / \| \ __\
// \ \___( <_> ) Y Y \ Y Y \ || |
// \______ /\____/|__|_| /__|_| /__||__|
// \/ \/ \/
// ____ ____ .__ _____.__ __ .__
// \ \ / /___________|__|/ ____\__| ____ _____ _/ |_|__| ____ ____
// \ Y // __ \_ __ \ \ __\| |/ ___\\__ \\ __\ |/ _ \ / \
// \ /\ ___/| | \/ || | | \ \___ / __ \| | | ( <_> ) | \
// \___/ \___ >__| |__||__| |__|\___ >____ /__| |__|\____/|___| /
// \/ \/ \/ \/
//
// This file contains commit verification functions for refs passed across in hooks
func verifyCommits ( oldCommitID , newCommitID string , repo * git . Repository , env [ ] string ) error {
stdoutReader , stdoutWriter , err := os . Pipe ( )
if err != nil {
log . Error ( "Unable to create os.Pipe for %s" , repo . Path )
return err
}
defer func ( ) {
_ = stdoutReader . Close ( )
_ = stdoutWriter . Close ( )
} ( )
// This is safe as force pushes are already forbidden
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err = git . NewCommand ( repo . Ctx , "rev-list" , oldCommitID + "..." + newCommitID ) .
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RunInDirTimeoutEnvFullPipelineFunc ( env , - 1 , repo . Path ,
stdoutWriter , nil , nil ,
func ( ctx context . Context , cancel context . CancelFunc ) error {
_ = stdoutWriter . Close ( )
err := readAndVerifyCommitsFromShaReader ( stdoutReader , repo , env )
if err != nil {
log . Error ( "%v" , err )
cancel ( )
}
_ = stdoutReader . Close ( )
return err
} )
if err != nil && ! isErrUnverifiedCommit ( err ) {
log . Error ( "Unable to check commits from %s to %s in %s: %v" , oldCommitID , newCommitID , repo . Path , err )
}
return err
}
func readAndVerifyCommitsFromShaReader ( input io . ReadCloser , repo * git . Repository , env [ ] string ) error {
scanner := bufio . NewScanner ( input )
for scanner . Scan ( ) {
line := scanner . Text ( )
err := readAndVerifyCommit ( line , repo , env )
if err != nil {
log . Error ( "%v" , err )
return err
}
}
return scanner . Err ( )
}
func readAndVerifyCommit ( sha string , repo * git . Repository , env [ ] string ) error {
stdoutReader , stdoutWriter , err := os . Pipe ( )
if err != nil {
log . Error ( "Unable to create pipe for %s: %v" , repo . Path , err )
return err
}
defer func ( ) {
_ = stdoutReader . Close ( )
_ = stdoutWriter . Close ( )
} ( )
hash := git . MustIDFromString ( sha )
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return git . NewCommand ( repo . Ctx , "cat-file" , "commit" , sha ) .
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RunInDirTimeoutEnvFullPipelineFunc ( env , - 1 , repo . Path ,
stdoutWriter , nil , nil ,
func ( ctx context . Context , cancel context . CancelFunc ) error {
_ = stdoutWriter . Close ( )
commit , err := git . CommitFromReader ( repo , hash , stdoutReader )
if err != nil {
return err
}
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verification := asymkey_model . ParseCommitWithSignature ( commit )
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if ! verification . Verified {
cancel ( )
return & errUnverifiedCommit {
commit . ID . String ( ) ,
}
}
return nil
} )
}
type errUnverifiedCommit struct {
sha string
}
func ( e * errUnverifiedCommit ) Error ( ) string {
return fmt . Sprintf ( "Unverified commit: %s" , e . sha )
}
func isErrUnverifiedCommit ( err error ) bool {
_ , ok := err . ( * errUnverifiedCommit )
return ok
}