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Signed-off-by: Alex Snaps <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package response | ||
|
|
||
| import ( | ||
| "context" | ||
| "reflect" | ||
| "strings" | ||
|
|
||
| "github.com/golang/protobuf/jsonpb" | ||
| "github.com/google/cel-go/cel" | ||
| "github.com/google/cel-go/checker/decls" | ||
| "github.com/google/cel-go/common/types/ref" | ||
| "github.com/kuadrant/authorino/pkg/auth" | ||
| "google.golang.org/protobuf/types/known/structpb" | ||
|
|
||
| "google.golang.org/protobuf/encoding/protojson" | ||
| "google.golang.org/protobuf/proto" | ||
| ) | ||
|
|
||
| const rootBinding = "auth" | ||
|
|
||
| func NewDynamicCelResponse(expression string) (*DynamicCEL, error) { | ||
|
|
||
| cel_exp := DynamicCEL{} | ||
|
|
||
| env, err := cel.NewEnv(cel.Declarations( | ||
| decls.NewConst(rootBinding, decls.NewObjectType("google.protobuf.Struct"), nil), | ||
| )) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| ast, issues := env.Parse(expression) | ||
| if issues.Err() != nil { | ||
| return nil, issues.Err() | ||
| } | ||
|
|
||
| checked, issues := env.Check(ast) | ||
| if issues.Err() != nil { | ||
| return nil, issues.Err() | ||
| } | ||
|
|
||
| program, err := env.Program(checked) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| cel_exp.program = program | ||
|
|
||
| return &cel_exp, nil | ||
| } | ||
|
|
||
| type DynamicCEL struct { | ||
| program cel.Program | ||
| } | ||
|
|
||
| func (c *DynamicCEL) Call(pipeline auth.AuthPipeline, ctx context.Context) (interface{}, error) { | ||
|
|
||
| auth_json := pipeline.GetAuthorizationJSON() | ||
| data := structpb.Struct{} | ||
| if err := jsonpb.Unmarshal(strings.NewReader(auth_json), &data); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| value := data.GetFields()["auth"] | ||
| result, _, err := c.program.Eval(map[string]interface{}{ | ||
| rootBinding: value, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if jsonVal, err := valueToJSON(result); err != nil { | ||
| return nil, err | ||
| } else { | ||
| return jsonVal, nil | ||
| } | ||
| } | ||
|
|
||
| func valueToJSON(val ref.Val) (string, error) { | ||
| v, err := val.ConvertToNative(reflect.TypeOf(&structpb.Value{})) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| marshaller := protojson.MarshalOptions{Multiline: false} | ||
| bytes, err := marshaller.Marshal(v.(proto.Message)) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return string(bytes), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package response | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "testing" | ||
|
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| mock_auth "github.com/kuadrant/authorino/pkg/auth/mocks" | ||
| "gotest.tools/assert" | ||
|
|
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| "github.com/golang/mock/gomock" | ||
| ) | ||
|
|
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| func TestDynamicCELCall(t *testing.T) { | ||
| ctrl := gomock.NewController(t) | ||
| defer ctrl.Finish() | ||
|
|
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| celResponseEvaluator, _ := NewDynamicCelResponse(`{"prop1": "value1", "prop2": auth.identity.username}`) | ||
|
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| pipelineMock := mock_auth.NewMockAuthPipeline(ctrl) | ||
| pipelineMock.EXPECT().GetAuthorizationJSON().Return(`{"auth":{"identity":{"username":"john","evil": false}}}`) | ||
|
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| response, err := celResponseEvaluator.Call(pipelineMock, context.TODO()) | ||
| assert.NilError(t, err) | ||
|
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| // We need to parse this response: https://protobuf.dev/reference/go/faq/#unstable-json | ||
| result := struct { | ||
| Prop1 string `json:"prop1"` | ||
| Prop2 string `json:"prop2"` | ||
| }{} | ||
| assert.NilError(t, json.Unmarshal([]byte(response.(string)), &result)) | ||
|
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| assert.Equal(t, result.Prop1, "value1") | ||
| assert.Equal(t, result.Prop2, "john") | ||
| } |
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