Ophestra Umiker
65af1684e3
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Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
78 lines
1.8 KiB
Go
78 lines
1.8 KiB
Go
package system
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import (
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"fmt"
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"slices"
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"git.ophivana.moe/security/fortify/acl"
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"git.ophivana.moe/security/fortify/internal/fmsg"
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"git.ophivana.moe/security/fortify/internal/verbose"
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)
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// UpdatePerm appends an ephemeral acl update Op.
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func (sys *I) UpdatePerm(path string, perms ...acl.Perm) {
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sys.UpdatePermType(Process, path, perms...)
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}
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// UpdatePermType appends an acl update Op.
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func (sys *I) UpdatePermType(et Enablement, path string, perms ...acl.Perm) {
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sys.lock.Lock()
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defer sys.lock.Unlock()
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sys.ops = append(sys.ops, &ACL{et, path, perms})
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}
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type ACL struct {
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et Enablement
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path string
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perms []acl.Perm
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}
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func (a *ACL) Type() Enablement {
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return a.et
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}
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func (a *ACL) apply(sys *I) error {
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verbose.Println("applying ACL", a, "uid:", sys.uid, "type:", TypeString(a.et), "path:", a.path)
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return fmsg.WrapErrorSuffix(acl.UpdatePerm(a.path, sys.uid, a.perms...),
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fmt.Sprintf("cannot apply ACL entry to %q:", a.path))
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}
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func (a *ACL) revert(sys *I, ec *Criteria) error {
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if ec.hasType(a) {
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verbose.Println("stripping ACL", a, "uid:", sys.uid, "type:", TypeString(a.et), "path:", a.path)
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return fmsg.WrapErrorSuffix(acl.UpdatePerm(a.path, sys.uid),
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fmt.Sprintf("cannot strip ACL entry from %q:", a.path))
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} else {
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verbose.Println("skipping ACL", a, "uid:", sys.uid, "tag:", TypeString(a.et), "path:", a.path)
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return nil
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}
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}
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func (a *ACL) Is(o Op) bool {
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a0, ok := o.(*ACL)
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return ok && a0 != nil &&
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a.et == a0.et &&
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a.path == a0.path &&
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slices.Equal(a.perms, a0.perms)
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}
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func (a *ACL) Path() string {
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return a.path
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}
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func (a *ACL) String() string {
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var s = []byte("---")
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for _, p := range a.perms {
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switch p {
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case acl.Read:
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s[0] = 'r'
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case acl.Write:
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s[1] = 'w'
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case acl.Execute:
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s[2] = 'x'
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}
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}
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return string(s)
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}
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