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