frostfs-node/cmd/frostfs-cli/modules/util/acl.go

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package util
import (
"bytes"
"crypto/ecdsa"
"encoding/hex"
"errors"
"fmt"
"strings"
"text/tabwriter"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/eacl"
"github.com/flynn-archive/go-shlex"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/olekukonko/tablewriter"
"github.com/spf13/cobra"
)
// PrettyPrintTableBACL print basic ACL in table format.
func PrettyPrintTableBACL(cmd *cobra.Command, bacl *acl.Basic) {
// Header
w := tabwriter.NewWriter(cmd.OutOrStdout(), 1, 4, 4, ' ', 0)
fmt.Fprintln(w, "\tRangeHASH\tRange\tSearch\tDelete\tPut\tHead\tGet")
// Bits
bits := []string{
boolToString(bacl.Sticky()) + " " + boolToString(!bacl.Extendable()),
getRoleBitsForOperation(bacl, acl.OpObjectHash), getRoleBitsForOperation(bacl, acl.OpObjectRange),
getRoleBitsForOperation(bacl, acl.OpObjectSearch), getRoleBitsForOperation(bacl, acl.OpObjectDelete),
getRoleBitsForOperation(bacl, acl.OpObjectPut), getRoleBitsForOperation(bacl, acl.OpObjectHead),
getRoleBitsForOperation(bacl, acl.OpObjectGet),
}
fmt.Fprintln(w, strings.Join(bits, "\t"))
// Footer
footer := []string{"X F"}
for i := 0; i < 7; i++ {
footer = append(footer, "U S O B")
}
fmt.Fprintln(w, strings.Join(footer, "\t"))
w.Flush()
cmd.Println(" X-Sticky F-Final U-User S-System O-Others B-Bearer")
}
func getRoleBitsForOperation(bacl *acl.Basic, op acl.Op) string {
return boolToString(bacl.IsOpAllowed(op, acl.RoleOwner)) + " " +
boolToString(bacl.IsOpAllowed(op, acl.RoleContainer)) + " " +
boolToString(bacl.IsOpAllowed(op, acl.RoleOthers)) + " " +
boolToString(bacl.AllowedBearerRules(op))
}
func boolToString(b bool) string {
if b {
return "1"
}
return "0"
}
// PrettyPrintTableEACL print extended ACL in table format.
func PrettyPrintTableEACL(cmd *cobra.Command, table *eacl.Table) {
out := tablewriter.NewWriter(cmd.OutOrStdout())
out.SetHeader([]string{"Operation", "Action", "Filters", "Targets"})
out.SetAlignment(tablewriter.ALIGN_CENTER)
out.SetRowLine(true)
out.SetAutoWrapText(false)
for _, r := range table.Records() {
out.Append([]string{
r.Operation().String(),
r.Action().String(),
eaclFiltersToString(r.Filters()),
eaclTargetsToString(r.Targets()),
})
}
out.Render()
}
func eaclTargetsToString(ts []eacl.Target) string {
b := bytes.NewBuffer(nil)
for _, t := range ts {
keysExists := len(t.BinaryKeys()) > 0
switch t.Role() {
case eacl.RoleUser:
b.WriteString("User")
if keysExists {
b.WriteString(": ")
}
case eacl.RoleSystem:
b.WriteString("System")
if keysExists {
b.WriteString(": ")
}
case eacl.RoleOthers:
b.WriteString("Others")
if keysExists {
b.WriteString(": ")
}
default:
b.WriteString("Unknown")
if keysExists {
b.WriteString(": ")
}
}
for i, pub := range t.BinaryKeys() {
if i != 0 {
b.WriteString(" ")
}
b.WriteString(hex.EncodeToString(pub))
b.WriteString("\n")
}
}
return b.String()
}
func eaclFiltersToString(fs []eacl.Filter) string {
b := bytes.NewBuffer(nil)
tw := tabwriter.NewWriter(b, 0, 0, 1, ' ', 0)
for _, f := range fs {
switch f.From() {
case eacl.HeaderFromObject:
_, _ = tw.Write([]byte("O:\t"))
case eacl.HeaderFromRequest:
_, _ = tw.Write([]byte("R:\t"))
case eacl.HeaderFromService:
_, _ = tw.Write([]byte("S:\t"))
default:
_, _ = tw.Write([]byte(" \t"))
}
_, _ = tw.Write([]byte(f.Key()))
switch f.Matcher() {
case eacl.MatchStringEqual:
_, _ = tw.Write([]byte("\t==\t"))
case eacl.MatchStringNotEqual:
_, _ = tw.Write([]byte("\t!=\t"))
case eacl.MatchUnknown:
}
_, _ = tw.Write([]byte(f.Value() + "\t"))
_, _ = tw.Write([]byte("\n"))
}
_ = tw.Flush()
// To have nice output with tabwriter, we must append newline
// after the last line. Here we strip it to delete empty line
// in the final output.
s := b.String()
if len(s) > 0 {
s = s[:len(s)-1]
}
return s
}
// ParseEACLRules parses eACL table.
// Uses ParseEACLRule.
//
//nolint:godot
func ParseEACLRules(table *eacl.Table, rules []string) error {
if len(rules) == 0 {
return errors.New("no extended ACL rules has been provided")
}
for _, ruleStr := range rules {
err := ParseEACLRule(table, ruleStr)
if err != nil {
return fmt.Errorf("can't create extended acl record from rule '%s': %v", ruleStr, err)
}
}
return nil
}
// ParseEACLRule parses eACL table from the following form:
// <action> <operation> [<filter1> ...] [<target1> ...]
//
// Examples:
// allow get req:X-Header=123 obj:Attr=value others:0xkey1,key2 system:key3 user:key4
//
//nolint:godot
func ParseEACLRule(table *eacl.Table, rule string) error {
r, err := shlex.Split(rule)
if err != nil {
return fmt.Errorf("can't parse rule '%s': %v", rule, err)
}
return parseEACLTable(table, r)
}
func parseEACLTable(tb *eacl.Table, args []string) error {
if len(args) < 2 {
return errors.New("at least 2 arguments must be provided")
}
var action eacl.Action
if !action.FromString(strings.ToUpper(args[0])) {
return errors.New("invalid action (expected 'allow' or 'deny')")
}
ops, err := eaclOperationsFromString(args[1])
if err != nil {
return err
}
r, err := parseEACLRecord(args[2:])
if err != nil {
return err
}
r.SetAction(action)
for _, op := range ops {
r := *r
r.SetOperation(op)
tb.AddRecord(&r)
}
return nil
}
func parseEACLRecord(args []string) (*eacl.Record, error) {
r := new(eacl.Record)
for _, arg := range args {
before, after, found := strings.Cut(arg, ":")
switch prefix := strings.ToLower(before); prefix {
case "req", "obj": // filters
if !found {
return nil, fmt.Errorf("invalid filter or target: %s", arg)
}
var key, value string
var op eacl.Match
var f bool
key, value, f = strings.Cut(after, "!=")
if f {
op = eacl.MatchStringNotEqual
} else {
key, value, f = strings.Cut(after, "=")
if !f {
return nil, fmt.Errorf("invalid filter key-value pair: %s", after)
}
op = eacl.MatchStringEqual
}
typ := eacl.HeaderFromRequest
if before == "obj" {
typ = eacl.HeaderFromObject
}
r.AddFilter(typ, op, key, value)
case "others", "system", "user", "pubkey": // targets
var err error
var pubs []ecdsa.PublicKey
if found {
pubs, err = parseKeyList(after)
if err != nil {
return nil, err
}
}
var role eacl.Role
if prefix != "pubkey" {
role, err = eaclRoleFromString(prefix)
if err != nil {
return nil, err
}
}
eacl.AddFormedTarget(r, role, pubs...)
default:
return nil, fmt.Errorf("invalid prefix: %s", before)
}
}
return r, nil
}
// eaclRoleFromString parses eacl.Role from string.
func eaclRoleFromString(s string) (eacl.Role, error) {
var r eacl.Role
if !r.FromString(strings.ToUpper(s)) {
return r, fmt.Errorf("unexpected role %s", s)
}
return r, nil
}
// parseKeyList parses list of hex-encoded public keys separated by comma.
func parseKeyList(s string) ([]ecdsa.PublicKey, error) {
ss := strings.Split(s, ",")
pubs := make([]ecdsa.PublicKey, len(ss))
for i := range ss {
st := strings.TrimPrefix(ss[i], "0x")
pub, err := keys.NewPublicKeyFromString(st)
if err != nil {
return nil, fmt.Errorf("invalid public key '%s': %w", ss[i], err)
}
pubs[i] = ecdsa.PublicKey(*pub)
}
return pubs, nil
}
// eaclOperationsFromString parses list of eacl.Operation separated by comma.
func eaclOperationsFromString(s string) ([]eacl.Operation, error) {
ss := strings.Split(s, ",")
ops := make([]eacl.Operation, len(ss))
for i := range ss {
if !ops[i].FromString(strings.ToUpper(ss[i])) {
return nil, fmt.Errorf("invalid operation: %s", ss[i])
}
}
return ops, nil
}