ceph-csi/vendor/github.com/google/cel-go/ext/encoders.go
dependabot[bot] 07b05616a0 rebase: bump k8s.io/kubernetes from 1.26.2 to 1.27.2
Bumps [k8s.io/kubernetes](https://github.com/kubernetes/kubernetes) from 1.26.2 to 1.27.2.
- [Release notes](https://github.com/kubernetes/kubernetes/releases)
- [Commits](https://github.com/kubernetes/kubernetes/compare/v1.26.2...v1.27.2)

---
updated-dependencies:
- dependency-name: k8s.io/kubernetes
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
2023-06-06 12:21:43 +00:00

89 lines
2.4 KiB
Go

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ext
import (
"encoding/base64"
"reflect"
"github.com/google/cel-go/cel"
"github.com/google/cel-go/common/types"
"github.com/google/cel-go/common/types/ref"
)
// Encoders returns a cel.EnvOption to configure extended functions for string, byte, and object
// encodings.
//
// Base64.Decode
//
// Decodes base64-encoded string to bytes.
//
// This function will return an error if the string input is not base64-encoded.
//
// base64.decode(<string>) -> <bytes>
//
// Examples:
//
// base64.decode('aGVsbG8=') // return b'hello'
// base64.decode('aGVsbG8') // error
//
// Base64.Encode
//
// Encodes bytes to a base64-encoded string.
//
// base64.encode(<bytes>) -> <string>
//
// Examples:
//
// base64.encode(b'hello') // return b'aGVsbG8='
func Encoders() cel.EnvOption {
return cel.Lib(encoderLib{})
}
type encoderLib struct{}
func (encoderLib) CompileOptions() []cel.EnvOption {
return []cel.EnvOption{
cel.Function("base64.decode",
cel.Overload("base64_decode_string", []*cel.Type{cel.StringType}, cel.BytesType,
cel.UnaryBinding(func(str ref.Val) ref.Val {
s := str.(types.String)
return bytesOrError(base64DecodeString(string(s)))
}))),
cel.Function("base64.encode",
cel.Overload("base64_encode_bytes", []*cel.Type{cel.BytesType}, cel.StringType,
cel.UnaryBinding(func(bytes ref.Val) ref.Val {
b := bytes.(types.Bytes)
return stringOrError(base64EncodeBytes([]byte(b)))
}))),
}
}
func (encoderLib) ProgramOptions() []cel.ProgramOption {
return []cel.ProgramOption{}
}
func base64DecodeString(str string) ([]byte, error) {
return base64.StdEncoding.DecodeString(str)
}
func base64EncodeBytes(bytes []byte) (string, error) {
return base64.StdEncoding.EncodeToString(bytes), nil
}
var (
bytesListType = reflect.TypeOf([]byte{})
)