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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Copyright 2023 Forerunner Labs, Inc. | ||
| // | ||
| // 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 authz | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "github.com/warrant-dev/warrant/pkg/service" | ||
| ) | ||
|
|
||
| func (svc QueryService) Routes() ([]service.Route, error) { | ||
| return []service.Route{ | ||
| service.WarrantRoute{ | ||
| Pattern: "/v1/query", | ||
| Method: "GET", | ||
| Handler: service.ChainMiddleware( | ||
| service.NewRouteHandler(svc, QueryHandler), | ||
| service.ListMiddleware[QueryListParamParser], | ||
| ), | ||
| }, | ||
| }, nil | ||
| } | ||
|
|
||
| func QueryHandler(svc QueryService, w http.ResponseWriter, r *http.Request) error { | ||
| queryString := r.URL.Query().Get("q") | ||
| query, err := NewQueryFromString(queryString) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| listParams := service.GetListParamsFromContext[QueryListParamParser](r.Context()) | ||
| lastId := r.URL.Query().Get("lastId") | ||
| if lastId != "" && listParams.AfterId == nil { | ||
| listParams.AfterId = &lastId | ||
| } | ||
|
|
||
| result, err := svc.Query(r.Context(), query, listParams) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| service.SendJSONResponse(w, result) | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| // Copyright 2023 Forerunner Labs, Inc. | ||
| // | ||
| // 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 authz | ||
|
|
||
| import ( | ||
| "fmt" | ||
| ) | ||
|
|
||
| type QueryListParamParser struct{} | ||
|
|
||
| func (parser QueryListParamParser) GetDefaultSortBy() string { | ||
| return "objectType" | ||
| } | ||
|
|
||
| func (parser QueryListParamParser) GetSupportedSortBys() []string { | ||
| return []string{"objectType", "objectId"} | ||
| } | ||
|
|
||
| func (parser QueryListParamParser) ParseValue(val string, sortBy string) (interface{}, error) { | ||
| return nil, fmt.Errorf("must match type of selected sortBy attribute %s", sortBy) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| // Copyright 2023 Forerunner Labs, Inc. | ||
| // | ||
| // 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 authz | ||
|
|
||
| import ( | ||
| "strings" | ||
|
|
||
| "github.com/alecthomas/participle/v2" | ||
| "github.com/alecthomas/participle/v2/lexer" | ||
| "github.com/pkg/errors" | ||
| warrant "github.com/warrant-dev/warrant/pkg/authz/warrant" | ||
| "github.com/warrant-dev/warrant/pkg/service" | ||
| ) | ||
|
|
||
| type selectClause struct { | ||
| Explicit bool `parser:"@Explicit?"` | ||
| ObjectTypesOrRelations []string `parser:"(@Wildcard | (@TypeOrRelation (Comma @TypeOrRelation)*))?"` | ||
| SubjectTypes []string `parser:"(OfType (@Wildcard | (@TypeOrRelation (Comma @TypeOrRelation)*)))?"` | ||
| } | ||
|
|
||
| type forClause struct { | ||
| Object string `parser:"@Resource"` | ||
| } | ||
|
|
||
| type whereClause struct { | ||
| Subject string `parser:"@Resource Is"` | ||
| Relations []string `parser:"(@Wildcard | (@TypeOrRelation (Comma @TypeOrRelation)*))"` | ||
| } | ||
|
|
||
| type ast struct { | ||
| SelectClause *selectClause `parser:"Select @@"` | ||
| ForClause *forClause `parser:"(For @@)?"` | ||
| WhereClause *whereClause `parser:"(Where @@)?"` | ||
| } | ||
|
|
||
| var participleLexer = lexer.MustSimple([]lexer.SimpleRule{ | ||
| {Name: "Select", Pattern: `(?i)select`}, | ||
| {Name: "Explicit", Pattern: `(?i)explicit`}, | ||
| {Name: "Where", Pattern: `(?i)where`}, | ||
| {Name: "Is", Pattern: `(?i)is`}, | ||
| {Name: "For", Pattern: `(?i)for`}, | ||
| {Name: "OfType", Pattern: `(?i)of type`}, | ||
| {Name: "Resource", Pattern: `[a-zA-Z0-9_\-]+:[a-zA-Z0-9_\-\.@\|:]+`}, | ||
| {Name: "TypeOrRelation", Pattern: `[a-zA-Z0-9_\-]+`}, | ||
| {Name: "Wildcard", Pattern: `\*`}, | ||
| {Name: "Comma", Pattern: `,`}, | ||
| {Name: "EOL", Pattern: `[\n\r]+`}, | ||
| {Name: "whitespace", Pattern: `[ \t\n\r]+`}, | ||
| }) | ||
|
|
||
| type parser struct { | ||
| *participle.Parser[ast] | ||
| } | ||
|
|
||
| func newParser() (*parser, error) { | ||
| participleParser, err := participle.Build[ast]( | ||
| participle.Lexer(participleLexer), | ||
| ) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "error generating query parser") | ||
| } | ||
|
|
||
| return &parser{participleParser}, nil | ||
| } | ||
|
|
||
| func (parser parser) Parse(query string) (*ast, error) { | ||
| ast, err := parser.Parser.ParseString("", query) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "error parsing query") | ||
| } | ||
|
|
||
| return ast, nil | ||
| } | ||
|
|
||
| func NewQueryFromString(queryString string) (*Query, error) { | ||
| var query Query | ||
|
|
||
| queryParser, err := newParser() | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "error creating query from string") | ||
| } | ||
|
|
||
| ast, err := queryParser.Parse(queryString) | ||
| if err != nil { | ||
| return nil, service.NewInvalidParameterError("q", err.Error()) | ||
| } | ||
|
|
||
| if ast.SelectClause == nil { | ||
| return nil, service.NewInvalidParameterError("q", "must contain a 'select' clause") | ||
| } | ||
|
|
||
| if ast.SelectClause.ObjectTypesOrRelations == nil && ast.SelectClause.SubjectTypes == nil { | ||
| return nil, service.NewInvalidParameterError("q", "incomplete 'select' clause") | ||
| } | ||
|
|
||
| if ast.ForClause != nil && ast.WhereClause != nil { | ||
| return nil, service.NewInvalidParameterError("q", "cannot contain both a 'for' clause and a 'where' clause") | ||
| } | ||
|
|
||
| query.Expand = !ast.SelectClause.Explicit | ||
|
|
||
| if ast.SelectClause.SubjectTypes != nil { // Querying for subjects | ||
| if len(ast.SelectClause.SubjectTypes) == 0 { | ||
| return nil, service.NewInvalidParameterError("q", "must contain one or more types of subjects to select") | ||
| } | ||
|
|
||
| if ast.SelectClause.ObjectTypesOrRelations == nil || len(ast.SelectClause.ObjectTypesOrRelations) == 0 { | ||
| return nil, service.NewInvalidParameterError("q", "must select one or more relations for subjects to match on the object") | ||
| } | ||
|
|
||
| if ast.WhereClause != nil { | ||
| return nil, service.NewInvalidParameterError("q", "cannot contain a 'where' clause when selecting subjects") | ||
| } | ||
|
|
||
| query.SelectSubjects = &SelectSubjects{ | ||
| Relations: ast.SelectClause.ObjectTypesOrRelations, | ||
| SubjectTypes: ast.SelectClause.SubjectTypes, | ||
| } | ||
|
|
||
| if ast.ForClause != nil { | ||
| objectType, objectId, colonFound := strings.Cut(ast.ForClause.Object, ":") | ||
| if !colonFound { | ||
| return nil, service.NewInvalidParameterError("q", "'for' clause contains invalid object") | ||
| } | ||
|
|
||
| query.SelectSubjects.ForObject = &Resource{ | ||
| Type: objectType, | ||
| Id: objectId, | ||
| } | ||
| } | ||
| } else { // Querying for objects | ||
| if ast.SelectClause.ObjectTypesOrRelations == nil || len(ast.SelectClause.ObjectTypesOrRelations) == 0 { | ||
| return nil, service.NewInvalidParameterError("q", "must contain one or more types of objects to select") | ||
| } | ||
|
|
||
| if ast.ForClause != nil { | ||
| return nil, service.NewInvalidParameterError("q", "cannot contain a 'for' clause when selecting objects") | ||
| } | ||
|
|
||
| query.SelectObjects = &SelectObjects{ | ||
| ObjectTypes: ast.SelectClause.ObjectTypesOrRelations, | ||
| Relations: []string{warrant.Wildcard}, | ||
| } | ||
|
|
||
| if ast.WhereClause != nil { | ||
| if ast.WhereClause.Relations == nil || len(ast.WhereClause.Relations) == 0 { | ||
| return nil, service.NewInvalidParameterError("q", "must contain one or more relations the subject must have on matching objects") | ||
| } | ||
|
|
||
| subjectType, subjectId, colonFound := strings.Cut(ast.WhereClause.Subject, ":") | ||
| if !colonFound { | ||
| return nil, service.NewInvalidParameterError("q", "'where' clause contains invalid subject") | ||
| } | ||
|
|
||
| query.SelectObjects.Relations = ast.WhereClause.Relations | ||
| query.SelectObjects.WhereSubject = &Resource{ | ||
| Type: subjectType, | ||
| Id: subjectId, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return &query, nil | ||
| } |
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