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Added an event for default rule "Adding ssh keys to authorized_keys" #117

Merged
merged 10 commits into from
Apr 2, 2024
42 changes: 42 additions & 0 deletions events/syscall/adding_ssh_keys_to_authorized_keys.go
Original file line number Diff line number Diff line change
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// SPDX-License-Identifier: Apache-2.0
/*
Copyright (C) 2024 The Falco Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package syscall

import (
"os"
"path/filepath"

"github.com/falcosecurity/event-generator/events"
)

var _ = events.Register(
AddingSshKeysToAuthorizedKeys,
events.WithDisabled(), // this rules is not included in falco_rules.yaml (stable rules), so disable the action
)

func AddingSshKeysToAuthorizedKeys(h events.Helper) error {
// Creates .ssh directory inside tempDirectory
sshDir, cleanup, err := createSshDirectoryUnderHome()
if err != nil {
return err
}
defer cleanup() // Cleanup after function return

filename := filepath.Join(sshDir, "authorized_keys")
h.Log().Infof("writing to %s", filename)

// Create authorized_keys file, and write into it
return os.WriteFile(filename, []byte("ssh-rsa <ssh_public_key>\n"), os.FileMode(0755))
}
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