steve
7b1990cf11
Agent: new runner.BackupHooks struct + runHook helper invoked via /bin/sh -c (cmd.exe /C on Windows). pre_hook non-zero exit aborts the backup; post_hook always runs with RM_JOB_STATUS=succeeded|failed in env. Output streamed as 'hook(<phase>): …' log.stream lines. Hooks only run for kind=backup (other kinds skip both phases). Server: resolveBackupHooks resolves group → host default → empty, decrypts via crypto.AEAD with per-slot ad bytes, plumbs plaintext into CommandRunPayload for both schedule.fire and per-group Run-now dispatch sites. Decrypt failures degrade silently to no hook so a malformed blob can't poison every backup.
76 lines
2.7 KiB
Go
76 lines
2.7 KiB
Go
// hooks_resolve.go — server-side resolution of pre/post hooks for a
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// backup dispatch (P2R-11). The agent receives plaintext hook bodies
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// in CommandRunPayload; this file is where the AEAD blob on the
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// source group (or the host's default) gets decrypted into the
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// strings the wire payload carries.
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//
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// Resolution order:
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// 1. source_group.<phase>_hook (per-group override)
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// 2. host.<phase>_hook_default (host-wide default)
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// 3. "" (no hook → agent skips that phase)
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//
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// Decrypt errors are logged and treated as "no hook configured" so
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// a malformed blob can't poison every backup. The audit trail
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// captures the underlying state regardless.
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package http
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import (
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"log/slog"
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"gitea.dcglab.co.uk/steve/restic-manager/internal/store"
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)
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// resolveBackupHooks returns the (pre, post) plaintext hook strings
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// the agent should run around the backup. Both are empty when no
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// hook is configured at either level.
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func (s *Server) resolveBackupHooks(host *store.Host, g *store.SourceGroup) (pre, post string) {
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if s.deps.AEAD == nil {
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return "", ""
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}
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pre = s.decryptHookOrFallback(g.PreHook, host.PreHookDefault, host.ID, "pre")
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post = s.decryptHookOrFallback(g.PostHook, host.PostHookDefault, host.ID, "post")
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return pre, post
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}
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// decryptHookOrFallback returns the per-group hook decrypted, or
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// (when that's empty) the host default decrypted, or "" if neither
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// is configured. Decrypt failures log and degrade to empty.
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func (s *Server) decryptHookOrFallback(group, hostDefault, hostID, phase string) string {
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tryDecrypt := func(blob, slot string) (string, bool) {
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if blob == "" {
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return "", false
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}
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plain, err := s.deps.AEAD.Decrypt(blob, []byte("hook:"+hostID+":"+slot+":"+phase))
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if err != nil {
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slog.Error("decrypt hook", "host_id", hostID, "phase", phase, "slot", slot, "err", err)
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return "", false
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}
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return string(plain), true
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}
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if v, ok := tryDecrypt(group, "group"); ok {
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return v
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}
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if v, ok := tryDecrypt(hostDefault, "host"); ok {
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return v
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}
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return ""
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}
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// EncryptHookForGroup encrypts a hook body for storage on a source
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// group. Caller passes the plaintext from a UI form; an empty body
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// returns "" so the store persists NULL (cleared).
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func (s *Server) EncryptHookForGroup(hostID, phase, body string) (string, error) {
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if body == "" {
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return "", nil
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}
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return s.deps.AEAD.Encrypt([]byte(body), []byte("hook:"+hostID+":group:"+phase))
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}
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// EncryptHookForHost is the host-default twin of EncryptHookForGroup.
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func (s *Server) EncryptHookForHost(hostID, phase, body string) (string, error) {
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if body == "" {
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return "", nil
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}
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return s.deps.AEAD.Encrypt([]byte(body), []byte("hook:"+hostID+":host:"+phase))
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}
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