mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-09 17:09:29 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
852 lines
16 KiB
Go
852 lines
16 KiB
Go
package jsonpatch
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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"github.com/pkg/errors"
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)
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const (
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eRaw = iota
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eDoc
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eAry
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)
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var (
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// SupportNegativeIndices decides whether to support non-standard practice of
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// allowing negative indices to mean indices starting at the end of an array.
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// Default to true.
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SupportNegativeIndices bool = true
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// AccumulatedCopySizeLimit limits the total size increase in bytes caused by
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// "copy" operations in a patch.
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AccumulatedCopySizeLimit int64 = 0
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)
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var (
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ErrTestFailed = errors.New("test failed")
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ErrMissing = errors.New("missing value")
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ErrUnknownType = errors.New("unknown object type")
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ErrInvalid = errors.New("invalid state detected")
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ErrInvalidIndex = errors.New("invalid index referenced")
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)
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type lazyNode struct {
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raw *json.RawMessage
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doc partialDoc
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ary partialArray
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which int
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}
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// Operation is a single JSON-Patch step, such as a single 'add' operation.
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type Operation map[string]*json.RawMessage
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// Patch is an ordered collection of Operations.
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type Patch []Operation
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type partialDoc map[string]*lazyNode
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type partialArray []*lazyNode
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type container interface {
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get(key string) (*lazyNode, error)
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set(key string, val *lazyNode) error
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add(key string, val *lazyNode) error
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remove(key string) error
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}
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func newLazyNode(raw *json.RawMessage) *lazyNode {
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return &lazyNode{raw: raw, doc: nil, ary: nil, which: eRaw}
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}
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func (n *lazyNode) MarshalJSON() ([]byte, error) {
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switch n.which {
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case eRaw:
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return json.Marshal(n.raw)
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case eDoc:
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return json.Marshal(n.doc)
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case eAry:
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return json.Marshal(n.ary)
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default:
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return nil, ErrUnknownType
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}
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}
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func (n *lazyNode) UnmarshalJSON(data []byte) error {
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dest := make(json.RawMessage, len(data))
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copy(dest, data)
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n.raw = &dest
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n.which = eRaw
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return nil
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}
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func deepCopy(src *lazyNode) (*lazyNode, int, error) {
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if src == nil {
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return nil, 0, nil
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}
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a, err := src.MarshalJSON()
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if err != nil {
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return nil, 0, err
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}
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sz := len(a)
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ra := make(json.RawMessage, sz)
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copy(ra, a)
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return newLazyNode(&ra), sz, nil
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}
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func (n *lazyNode) intoDoc() (*partialDoc, error) {
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if n.which == eDoc {
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return &n.doc, nil
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}
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if n.raw == nil {
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return nil, ErrInvalid
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}
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err := json.Unmarshal(*n.raw, &n.doc)
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if err != nil {
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return nil, err
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}
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n.which = eDoc
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return &n.doc, nil
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}
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func (n *lazyNode) intoAry() (*partialArray, error) {
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if n.which == eAry {
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return &n.ary, nil
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}
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if n.raw == nil {
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return nil, ErrInvalid
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}
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err := json.Unmarshal(*n.raw, &n.ary)
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if err != nil {
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return nil, err
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}
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n.which = eAry
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return &n.ary, nil
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}
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func (n *lazyNode) compact() []byte {
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buf := &bytes.Buffer{}
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if n.raw == nil {
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return nil
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}
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err := json.Compact(buf, *n.raw)
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if err != nil {
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return *n.raw
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}
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return buf.Bytes()
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}
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func (n *lazyNode) tryDoc() bool {
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if n.raw == nil {
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return false
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}
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err := json.Unmarshal(*n.raw, &n.doc)
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if err != nil {
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return false
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}
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n.which = eDoc
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return true
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}
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func (n *lazyNode) tryAry() bool {
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if n.raw == nil {
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return false
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}
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err := json.Unmarshal(*n.raw, &n.ary)
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if err != nil {
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return false
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}
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n.which = eAry
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return true
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}
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func (n *lazyNode) equal(o *lazyNode) bool {
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if n.which == eRaw {
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if !n.tryDoc() && !n.tryAry() {
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if o.which != eRaw {
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return false
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}
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return bytes.Equal(n.compact(), o.compact())
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}
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}
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if n.which == eDoc {
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if o.which == eRaw {
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if !o.tryDoc() {
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return false
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}
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}
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if o.which != eDoc {
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return false
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}
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if len(n.doc) != len(o.doc) {
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return false
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}
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for k, v := range n.doc {
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ov, ok := o.doc[k]
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if !ok {
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return false
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}
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if (v == nil) != (ov == nil) {
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return false
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}
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if v == nil && ov == nil {
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continue
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}
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if !v.equal(ov) {
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return false
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}
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}
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return true
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}
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if o.which != eAry && !o.tryAry() {
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return false
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}
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if len(n.ary) != len(o.ary) {
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return false
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}
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for idx, val := range n.ary {
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if !val.equal(o.ary[idx]) {
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return false
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}
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}
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return true
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}
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// Kind reads the "op" field of the Operation.
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func (o Operation) Kind() string {
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if obj, ok := o["op"]; ok && obj != nil {
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var op string
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err := json.Unmarshal(*obj, &op)
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if err != nil {
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return "unknown"
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}
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return op
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}
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return "unknown"
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}
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// Path reads the "path" field of the Operation.
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func (o Operation) Path() (string, error) {
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if obj, ok := o["path"]; ok && obj != nil {
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var op string
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err := json.Unmarshal(*obj, &op)
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if err != nil {
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return "unknown", err
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}
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return op, nil
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}
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return "unknown", errors.Wrapf(ErrMissing, "operation missing path field")
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}
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// From reads the "from" field of the Operation.
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func (o Operation) From() (string, error) {
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if obj, ok := o["from"]; ok && obj != nil {
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var op string
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err := json.Unmarshal(*obj, &op)
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if err != nil {
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return "unknown", err
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}
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return op, nil
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}
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return "unknown", errors.Wrapf(ErrMissing, "operation, missing from field")
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}
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func (o Operation) value() *lazyNode {
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if obj, ok := o["value"]; ok {
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return newLazyNode(obj)
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}
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return nil
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}
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// ValueInterface decodes the operation value into an interface.
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func (o Operation) ValueInterface() (interface{}, error) {
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if obj, ok := o["value"]; ok && obj != nil {
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var v interface{}
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err := json.Unmarshal(*obj, &v)
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if err != nil {
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return nil, err
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}
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return v, nil
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}
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return nil, errors.Wrapf(ErrMissing, "operation, missing value field")
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}
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func isArray(buf []byte) bool {
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Loop:
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for _, c := range buf {
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switch c {
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case ' ':
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case '\n':
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case '\t':
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continue
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case '[':
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return true
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default:
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break Loop
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}
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}
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return false
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}
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func findObject(pd *container, path string) (container, string) {
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doc := *pd
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split := strings.Split(path, "/")
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if len(split) < 2 {
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return nil, ""
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}
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parts := split[1 : len(split)-1]
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key := split[len(split)-1]
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var err error
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for _, part := range parts {
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next, ok := doc.get(decodePatchKey(part))
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if next == nil || ok != nil {
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return nil, ""
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}
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if isArray(*next.raw) {
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doc, err = next.intoAry()
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if err != nil {
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return nil, ""
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}
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} else {
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doc, err = next.intoDoc()
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if err != nil {
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return nil, ""
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}
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}
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}
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return doc, decodePatchKey(key)
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}
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func (d *partialDoc) set(key string, val *lazyNode) error {
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(*d)[key] = val
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return nil
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}
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func (d *partialDoc) add(key string, val *lazyNode) error {
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(*d)[key] = val
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return nil
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}
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func (d *partialDoc) get(key string) (*lazyNode, error) {
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return (*d)[key], nil
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}
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func (d *partialDoc) remove(key string) error {
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_, ok := (*d)[key]
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if !ok {
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return errors.Wrapf(ErrMissing, "Unable to remove nonexistent key: %s", key)
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}
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delete(*d, key)
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return nil
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}
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// set should only be used to implement the "replace" operation, so "key" must
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// be an already existing index in "d".
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func (d *partialArray) set(key string, val *lazyNode) error {
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idx, err := strconv.Atoi(key)
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if err != nil {
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return err
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}
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if idx < 0 {
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if !SupportNegativeIndices {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < -len(*d) {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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idx += len(*d)
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}
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(*d)[idx] = val
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return nil
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}
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func (d *partialArray) add(key string, val *lazyNode) error {
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if key == "-" {
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*d = append(*d, val)
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return nil
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}
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idx, err := strconv.Atoi(key)
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if err != nil {
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return errors.Wrapf(err, "value was not a proper array index: '%s'", key)
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}
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sz := len(*d) + 1
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ary := make([]*lazyNode, sz)
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cur := *d
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if idx >= len(ary) {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < 0 {
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if !SupportNegativeIndices {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < -len(ary) {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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idx += len(ary)
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}
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copy(ary[0:idx], cur[0:idx])
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ary[idx] = val
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copy(ary[idx+1:], cur[idx:])
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*d = ary
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return nil
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}
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func (d *partialArray) get(key string) (*lazyNode, error) {
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idx, err := strconv.Atoi(key)
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if err != nil {
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return nil, err
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}
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if idx < 0 {
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if !SupportNegativeIndices {
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return nil, errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < -len(*d) {
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return nil, errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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idx += len(*d)
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}
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if idx >= len(*d) {
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return nil, errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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return (*d)[idx], nil
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}
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func (d *partialArray) remove(key string) error {
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idx, err := strconv.Atoi(key)
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if err != nil {
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return err
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}
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cur := *d
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if idx >= len(cur) {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < 0 {
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if !SupportNegativeIndices {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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if idx < -len(cur) {
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return errors.Wrapf(ErrInvalidIndex, "Unable to access invalid index: %d", idx)
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}
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idx += len(cur)
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}
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ary := make([]*lazyNode, len(cur)-1)
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copy(ary[0:idx], cur[0:idx])
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copy(ary[idx:], cur[idx+1:])
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*d = ary
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return nil
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}
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func (p Patch) add(doc *container, op Operation) error {
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path, err := op.Path()
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if err != nil {
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return errors.Wrapf(ErrMissing, "add operation failed to decode path")
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}
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con, key := findObject(doc, path)
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if con == nil {
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return errors.Wrapf(ErrMissing, "add operation does not apply: doc is missing path: \"%s\"", path)
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}
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err = con.add(key, op.value())
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if err != nil {
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return errors.Wrapf(err, "error in add for path: '%s'", path)
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}
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return nil
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}
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func (p Patch) remove(doc *container, op Operation) error {
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path, err := op.Path()
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if err != nil {
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return errors.Wrapf(ErrMissing, "remove operation failed to decode path")
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}
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con, key := findObject(doc, path)
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if con == nil {
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return errors.Wrapf(ErrMissing, "remove operation does not apply: doc is missing path: \"%s\"", path)
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}
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err = con.remove(key)
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if err != nil {
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return errors.Wrapf(err, "error in remove for path: '%s'", path)
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}
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return nil
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}
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func (p Patch) replace(doc *container, op Operation) error {
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path, err := op.Path()
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if err != nil {
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return errors.Wrapf(err, "replace operation failed to decode path")
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}
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if path == "" {
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val := op.value()
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if val.which == eRaw {
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if !val.tryDoc() {
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if !val.tryAry() {
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return errors.Wrapf(err, "replace operation value must be object or array")
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}
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}
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}
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switch val.which {
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case eAry:
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*doc = &val.ary
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case eDoc:
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*doc = &val.doc
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case eRaw:
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return errors.Wrapf(err, "replace operation hit impossible case")
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}
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return nil
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}
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con, key := findObject(doc, path)
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if con == nil {
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return errors.Wrapf(ErrMissing, "replace operation does not apply: doc is missing path: %s", path)
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}
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_, ok := con.get(key)
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if ok != nil {
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return errors.Wrapf(ErrMissing, "replace operation does not apply: doc is missing key: %s", path)
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}
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err = con.set(key, op.value())
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if err != nil {
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return errors.Wrapf(err, "error in remove for path: '%s'", path)
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}
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return nil
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}
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func (p Patch) move(doc *container, op Operation) error {
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from, err := op.From()
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if err != nil {
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return errors.Wrapf(err, "move operation failed to decode from")
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}
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con, key := findObject(doc, from)
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if con == nil {
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return errors.Wrapf(ErrMissing, "move operation does not apply: doc is missing from path: %s", from)
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|
}
|
|
|
|
val, err := con.get(key)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error in move for path: '%s'", key)
|
|
}
|
|
|
|
err = con.remove(key)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error in move for path: '%s'", key)
|
|
}
|
|
|
|
path, err := op.Path()
|
|
if err != nil {
|
|
return errors.Wrapf(err, "move operation failed to decode path")
|
|
}
|
|
|
|
con, key = findObject(doc, path)
|
|
|
|
if con == nil {
|
|
return errors.Wrapf(ErrMissing, "move operation does not apply: doc is missing destination path: %s", path)
|
|
}
|
|
|
|
err = con.add(key, val)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error in move for path: '%s'", path)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (p Patch) test(doc *container, op Operation) error {
|
|
path, err := op.Path()
|
|
if err != nil {
|
|
return errors.Wrapf(err, "test operation failed to decode path")
|
|
}
|
|
|
|
if path == "" {
|
|
var self lazyNode
|
|
|
|
switch sv := (*doc).(type) {
|
|
case *partialDoc:
|
|
self.doc = *sv
|
|
self.which = eDoc
|
|
case *partialArray:
|
|
self.ary = *sv
|
|
self.which = eAry
|
|
}
|
|
|
|
if self.equal(op.value()) {
|
|
return nil
|
|
}
|
|
|
|
return errors.Wrapf(ErrTestFailed, "testing value %s failed", path)
|
|
}
|
|
|
|
con, key := findObject(doc, path)
|
|
|
|
if con == nil {
|
|
return errors.Wrapf(ErrMissing, "test operation does not apply: is missing path: %s", path)
|
|
}
|
|
|
|
val, err := con.get(key)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error in test for path: '%s'", path)
|
|
}
|
|
|
|
if val == nil {
|
|
if op.value().raw == nil {
|
|
return nil
|
|
}
|
|
return errors.Wrapf(ErrTestFailed, "testing value %s failed", path)
|
|
} else if op.value() == nil {
|
|
return errors.Wrapf(ErrTestFailed, "testing value %s failed", path)
|
|
}
|
|
|
|
if val.equal(op.value()) {
|
|
return nil
|
|
}
|
|
|
|
return errors.Wrapf(ErrTestFailed, "testing value %s failed", path)
|
|
}
|
|
|
|
func (p Patch) copy(doc *container, op Operation, accumulatedCopySize *int64) error {
|
|
from, err := op.From()
|
|
if err != nil {
|
|
return errors.Wrapf(err, "copy operation failed to decode from")
|
|
}
|
|
|
|
con, key := findObject(doc, from)
|
|
|
|
if con == nil {
|
|
return errors.Wrapf(ErrMissing, "copy operation does not apply: doc is missing from path: %s", from)
|
|
}
|
|
|
|
val, err := con.get(key)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error in copy for from: '%s'", from)
|
|
}
|
|
|
|
path, err := op.Path()
|
|
if err != nil {
|
|
return errors.Wrapf(ErrMissing, "copy operation failed to decode path")
|
|
}
|
|
|
|
con, key = findObject(doc, path)
|
|
|
|
if con == nil {
|
|
return errors.Wrapf(ErrMissing, "copy operation does not apply: doc is missing destination path: %s", path)
|
|
}
|
|
|
|
valCopy, sz, err := deepCopy(val)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error while performing deep copy")
|
|
}
|
|
|
|
(*accumulatedCopySize) += int64(sz)
|
|
if AccumulatedCopySizeLimit > 0 && *accumulatedCopySize > AccumulatedCopySizeLimit {
|
|
return NewAccumulatedCopySizeError(AccumulatedCopySizeLimit, *accumulatedCopySize)
|
|
}
|
|
|
|
err = con.add(key, valCopy)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "error while adding value during copy")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Equal indicates if 2 JSON documents have the same structural equality.
|
|
func Equal(a, b []byte) bool {
|
|
ra := make(json.RawMessage, len(a))
|
|
copy(ra, a)
|
|
la := newLazyNode(&ra)
|
|
|
|
rb := make(json.RawMessage, len(b))
|
|
copy(rb, b)
|
|
lb := newLazyNode(&rb)
|
|
|
|
return la.equal(lb)
|
|
}
|
|
|
|
// DecodePatch decodes the passed JSON document as an RFC 6902 patch.
|
|
func DecodePatch(buf []byte) (Patch, error) {
|
|
var p Patch
|
|
|
|
err := json.Unmarshal(buf, &p)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return p, nil
|
|
}
|
|
|
|
// Apply mutates a JSON document according to the patch, and returns the new
|
|
// document.
|
|
func (p Patch) Apply(doc []byte) ([]byte, error) {
|
|
return p.ApplyIndent(doc, "")
|
|
}
|
|
|
|
// ApplyIndent mutates a JSON document according to the patch, and returns the new
|
|
// document indented.
|
|
func (p Patch) ApplyIndent(doc []byte, indent string) ([]byte, error) {
|
|
if len(doc) == 0 {
|
|
return doc, nil
|
|
}
|
|
|
|
var pd container
|
|
if doc[0] == '[' {
|
|
pd = &partialArray{}
|
|
} else {
|
|
pd = &partialDoc{}
|
|
}
|
|
|
|
err := json.Unmarshal(doc, pd)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = nil
|
|
|
|
var accumulatedCopySize int64
|
|
|
|
for _, op := range p {
|
|
switch op.Kind() {
|
|
case "add":
|
|
err = p.add(&pd, op)
|
|
case "remove":
|
|
err = p.remove(&pd, op)
|
|
case "replace":
|
|
err = p.replace(&pd, op)
|
|
case "move":
|
|
err = p.move(&pd, op)
|
|
case "test":
|
|
err = p.test(&pd, op)
|
|
case "copy":
|
|
err = p.copy(&pd, op, &accumulatedCopySize)
|
|
default:
|
|
err = fmt.Errorf("Unexpected kind: %s", op.Kind())
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if indent != "" {
|
|
return json.MarshalIndent(pd, "", indent)
|
|
}
|
|
|
|
return json.Marshal(pd)
|
|
}
|
|
|
|
// From http://tools.ietf.org/html/rfc6901#section-4 :
|
|
//
|
|
// Evaluation of each reference token begins by decoding any escaped
|
|
// character sequence. This is performed by first transforming any
|
|
// occurrence of the sequence '~1' to '/', and then transforming any
|
|
// occurrence of the sequence '~0' to '~'.
|
|
|
|
var (
|
|
rfc6901Decoder = strings.NewReplacer("~1", "/", "~0", "~")
|
|
)
|
|
|
|
func decodePatchKey(k string) string {
|
|
return rfc6901Decoder.Replace(k)
|
|
}
|