Add more context aware error for policy parsing errors (#8726)

In existing functionality we simply return a generic
error such as "MalformedPolicy" which indicates just
a generic string "invalid resource" which is not very
meaningful when there might be multiple types of errors
during policy parsing. This PR ensures that we send
these errors back to client to indicate the actual
error, brings in two concrete types such as

 - iampolicy.Error
 - policy.Error

Refer #8202
master
Harshavardhana 5 years ago committed by GitHub
parent 84e55e2e6f
commit 6695fd6a61
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
  1. 2
      cmd/admin-handlers-users.go
  2. 6
      cmd/admin-handlers.go
  3. 7
      cmd/api-errors.go
  4. 2
      cmd/bucket-policy-handlers.go
  5. 6
      cmd/web-handlers.go
  6. 7
      pkg/iam/policy/action.go
  7. 4
      pkg/iam/policy/actionset.go
  8. 4
      pkg/iam/policy/admin-action.go
  9. 39
      pkg/iam/policy/error.go
  10. 5
      pkg/iam/policy/policy.go
  11. 9
      pkg/iam/policy/resource.go
  12. 4
      pkg/iam/policy/resourceset.go
  13. 13
      pkg/iam/policy/statement.go
  14. 7
      pkg/policy/action.go
  15. 4
      pkg/policy/actionset.go
  16. 5
      pkg/policy/effect.go
  17. 39
      pkg/policy/error.go
  18. 5
      pkg/policy/id.go
  19. 5
      pkg/policy/policy.go
  20. 5
      pkg/policy/principal.go
  21. 11
      pkg/policy/resource.go
  22. 4
      pkg/policy/resourceset.go
  23. 15
      pkg/policy/statement.go

@ -484,7 +484,7 @@ func (a adminAPIHandlers) AddCannedPolicy(w http.ResponseWriter, r *http.Request
iamPolicy, err := iampolicy.ParseConfig(io.LimitReader(r.Body, r.ContentLength)) iamPolicy, err := iampolicy.ParseConfig(io.LimitReader(r.Body, r.ContentLength))
if err != nil { if err != nil {
writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrMalformedPolicy), r.URL) writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
return return
} }

@ -979,6 +979,12 @@ func toAdminAPIErr(ctx context.Context, err error) APIError {
var apiErr APIError var apiErr APIError
switch e := err.(type) { switch e := err.(type) {
case iampolicy.Error:
apiErr = APIError{
Code: "XMinioMalformedIAMPolicy",
Description: e.Error(),
HTTPStatusCode: http.StatusBadRequest,
}
case config.Error: case config.Error:
apiErr = APIError{ apiErr = APIError{
Code: "XMinioConfigError", Code: "XMinioConfigError",

@ -34,6 +34,7 @@ import (
"github.com/minio/minio/pkg/auth" "github.com/minio/minio/pkg/auth"
"github.com/minio/minio/pkg/event" "github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/hash" "github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/policy"
) )
// APIError structure // APIError structure
@ -1772,6 +1773,12 @@ func toAPIError(ctx context.Context, err error) APIError {
// their internal error types. This code is only // their internal error types. This code is only
// useful with gateway implementations. // useful with gateway implementations.
switch e := err.(type) { switch e := err.(type) {
case policy.Error:
apiErr = APIError{
Code: "MalformedPolicy",
Description: e.Error(),
HTTPStatusCode: http.StatusBadRequest,
}
case crypto.Error: case crypto.Error:
apiErr = APIError{ apiErr = APIError{
Code: "XKMSInternalError", Code: "XKMSInternalError",

@ -77,7 +77,7 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
bucketPolicy, err := policy.ParseConfig(io.LimitReader(r.Body, r.ContentLength), bucket) bucketPolicy, err := policy.ParseConfig(io.LimitReader(r.Body, r.ContentLength), bucket)
if err != nil { if err != nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPolicy), r.URL, guessIsBrowserReq(r)) writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return return
} }

@ -2106,11 +2106,7 @@ func toWebAPIError(ctx context.Context, err error) APIError {
// Log unexpected and unhandled errors. // Log unexpected and unhandled errors.
logger.LogIf(ctx, err) logger.LogIf(ctx, err)
return APIError{ return toAPIError(ctx, err)
Code: "InternalError",
HTTPStatusCode: http.StatusInternalServerError,
Description: err.Error(),
}
} }
// writeWebErrorResponse - set HTTP status code and write error description to the body. // writeWebErrorResponse - set HTTP status code and write error description to the body.

@ -18,7 +18,6 @@ package iampolicy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"github.com/minio/minio/pkg/policy/condition" "github.com/minio/minio/pkg/policy/condition"
"github.com/minio/minio/pkg/wildcard" "github.com/minio/minio/pkg/wildcard"
@ -177,7 +176,7 @@ func (action Action) MarshalJSON() ([]byte, error) {
return json.Marshal(string(action)) return json.Marshal(string(action))
} }
return nil, fmt.Errorf("invalid action '%v'", action) return nil, Errorf("invalid action '%v'", action)
} }
// UnmarshalJSON - decodes JSON data to Action. // UnmarshalJSON - decodes JSON data to Action.
@ -190,7 +189,7 @@ func (action *Action) UnmarshalJSON(data []byte) error {
a := Action(s) a := Action(s)
if !a.IsValid() { if !a.IsValid() {
return fmt.Errorf("invalid action '%v'", s) return Errorf("invalid action '%v'", s)
} }
*action = a *action = a
@ -209,7 +208,7 @@ func parseAction(s string) (Action, error) {
return action, nil return action, nil
} }
return action, fmt.Errorf("unsupported action '%v'", s) return action, Errorf("unsupported action '%v'", s)
} }
// actionConditionKeyMap - holds mapping of supported condition key for an action. // actionConditionKeyMap - holds mapping of supported condition key for an action.

@ -58,7 +58,7 @@ func (actionSet ActionSet) Intersection(sset ActionSet) ActionSet {
// MarshalJSON - encodes ActionSet to JSON data. // MarshalJSON - encodes ActionSet to JSON data.
func (actionSet ActionSet) MarshalJSON() ([]byte, error) { func (actionSet ActionSet) MarshalJSON() ([]byte, error) {
if len(actionSet) == 0 { if len(actionSet) == 0 {
return nil, fmt.Errorf("empty action set") return nil, Errorf("empty action set")
} }
return json.Marshal(actionSet.ToSlice()) return json.Marshal(actionSet.ToSlice())
@ -92,7 +92,7 @@ func (actionSet *ActionSet) UnmarshalJSON(data []byte) error {
} }
if len(sset) == 0 { if len(sset) == 0 {
return fmt.Errorf("empty action set") return Errorf("empty action set")
} }
*actionSet = make(ActionSet) *actionSet = make(ActionSet)

@ -17,8 +17,6 @@
package iampolicy package iampolicy
import ( import (
"fmt"
"github.com/minio/minio/pkg/policy/condition" "github.com/minio/minio/pkg/policy/condition"
) )
@ -119,7 +117,7 @@ func parseAdminAction(s string) (AdminAction, error) {
return action, nil return action, nil
} }
return action, fmt.Errorf("unsupported action '%v'", s) return action, Errorf("unsupported action '%v'", s)
} }
// IsValid - checks if action is valid or not. // IsValid - checks if action is valid or not.

@ -0,0 +1,39 @@
/*
* MinIO Cloud Storage, (C) 2019 MinIO, 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 iampolicy
import "fmt"
// Error generic iam policy error type
type Error struct {
Err string
}
// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type iampolicy.Error
func Errorf(format string, a ...interface{}) error {
return Error{Err: fmt.Sprintf(format, a...)}
}
// New initializes a new Error
func New(err string) error {
return Error{Err: err}
}
func (e Error) Error() string {
return e.Err
}

@ -18,7 +18,6 @@ package iampolicy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"io" "io"
"github.com/minio/minio/pkg/policy" "github.com/minio/minio/pkg/policy"
@ -81,7 +80,7 @@ func (iamp Policy) IsEmpty() bool {
// isValid - checks if Policy is valid or not. // isValid - checks if Policy is valid or not.
func (iamp Policy) isValid() error { func (iamp Policy) isValid() error {
if iamp.Version != DefaultVersion && iamp.Version != "" { if iamp.Version != DefaultVersion && iamp.Version != "" {
return fmt.Errorf("invalid version '%v'", iamp.Version) return Errorf("invalid version '%v'", iamp.Version)
} }
for _, statement := range iamp.Statements { for _, statement := range iamp.Statements {
@ -106,7 +105,7 @@ func (iamp Policy) isValid() error {
continue continue
} }
return fmt.Errorf("duplicate actions %v, resources %v found in statements %v, %v", return Errorf("duplicate actions %v, resources %v found in statements %v, %v",
actions, resources, iamp.Statements[i], statement) actions, resources, iamp.Statements[i], statement)
} }
} }

@ -18,7 +18,6 @@ package iampolicy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"path" "path"
"strings" "strings"
@ -66,7 +65,7 @@ func (r Resource) Match(resource string, conditionValues map[string][]string) bo
// MarshalJSON - encodes Resource to JSON data. // MarshalJSON - encodes Resource to JSON data.
func (r Resource) MarshalJSON() ([]byte, error) { func (r Resource) MarshalJSON() ([]byte, error) {
if !r.IsValid() { if !r.IsValid() {
return nil, fmt.Errorf("invalid resource %v", r) return nil, Errorf("invalid resource %v", r)
} }
return json.Marshal(r.String()) return json.Marshal(r.String())
@ -96,7 +95,7 @@ func (r *Resource) UnmarshalJSON(data []byte) error {
// Validate - validates Resource is for given bucket or not. // Validate - validates Resource is for given bucket or not.
func (r Resource) Validate() error { func (r Resource) Validate() error {
if !r.IsValid() { if !r.IsValid() {
return fmt.Errorf("invalid resource") return Errorf("invalid resource")
} }
return nil return nil
} }
@ -104,14 +103,14 @@ func (r Resource) Validate() error {
// parseResource - parses string to Resource. // parseResource - parses string to Resource.
func parseResource(s string) (Resource, error) { func parseResource(s string) (Resource, error) {
if !strings.HasPrefix(s, ResourceARNPrefix) { if !strings.HasPrefix(s, ResourceARNPrefix) {
return Resource{}, fmt.Errorf("invalid resource '%v'", s) return Resource{}, Errorf("invalid resource '%v'", s)
} }
pattern := strings.TrimPrefix(s, ResourceARNPrefix) pattern := strings.TrimPrefix(s, ResourceARNPrefix)
tokens := strings.SplitN(pattern, "/", 2) tokens := strings.SplitN(pattern, "/", 2)
bucketName := tokens[0] bucketName := tokens[0]
if bucketName == "" { if bucketName == "" {
return Resource{}, fmt.Errorf("invalid resource format '%v'", s) return Resource{}, Errorf("invalid resource format '%v'", s)
} }
return Resource{ return Resource{

@ -69,7 +69,7 @@ func (resourceSet ResourceSet) Intersection(sset ResourceSet) ResourceSet {
// MarshalJSON - encodes ResourceSet to JSON data. // MarshalJSON - encodes ResourceSet to JSON data.
func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) { func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) {
if len(resourceSet) == 0 { if len(resourceSet) == 0 {
return nil, fmt.Errorf("empty resource set") return nil, Errorf("empty resource set")
} }
resources := []Resource{} resources := []Resource{}
@ -116,7 +116,7 @@ func (resourceSet *ResourceSet) UnmarshalJSON(data []byte) error {
} }
if _, found := (*resourceSet)[resource]; found { if _, found := (*resourceSet)[resource]; found {
return fmt.Errorf("duplicate resource '%v' found", s) return Errorf("duplicate resource '%v' found", s)
} }
resourceSet.Add(resource) resourceSet.Add(resource)

@ -18,7 +18,6 @@ package iampolicy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"strings" "strings"
"github.com/minio/minio/pkg/policy" "github.com/minio/minio/pkg/policy"
@ -74,11 +73,11 @@ func (statement Statement) isAdmin() bool {
// isValid - checks whether statement is valid or not. // isValid - checks whether statement is valid or not.
func (statement Statement) isValid() error { func (statement Statement) isValid() error {
if !statement.Effect.IsValid() { if !statement.Effect.IsValid() {
return fmt.Errorf("invalid Effect %v", statement.Effect) return Errorf("invalid Effect %v", statement.Effect)
} }
if len(statement.Actions) == 0 { if len(statement.Actions) == 0 {
return fmt.Errorf("Action must not be empty") return Errorf("Action must not be empty")
} }
if statement.isAdmin() { if statement.isAdmin() {
@ -86,14 +85,14 @@ func (statement Statement) isValid() error {
keys := statement.Conditions.Keys() keys := statement.Conditions.Keys()
keyDiff := keys.Difference(adminActionConditionKeyMap[action]) keyDiff := keys.Difference(adminActionConditionKeyMap[action])
if !keyDiff.IsEmpty() { if !keyDiff.IsEmpty() {
return fmt.Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action) return Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action)
} }
} }
return nil return nil
} }
if len(statement.Resources) == 0 { if len(statement.Resources) == 0 {
return fmt.Errorf("Resource must not be empty") return Errorf("Resource must not be empty")
} }
if err := statement.Resources.Validate(); err != nil { if err := statement.Resources.Validate(); err != nil {
@ -102,13 +101,13 @@ func (statement Statement) isValid() error {
for action := range statement.Actions { for action := range statement.Actions {
if !statement.Resources.objectResourceExists() && !statement.Resources.bucketResourceExists() { if !statement.Resources.objectResourceExists() && !statement.Resources.bucketResourceExists() {
return fmt.Errorf("unsupported Resource found %v for action %v", statement.Resources, action) return Errorf("unsupported Resource found %v for action %v", statement.Resources, action)
} }
keys := statement.Conditions.Keys() keys := statement.Conditions.Keys()
keyDiff := keys.Difference(actionConditionKeyMap[action]) keyDiff := keys.Difference(actionConditionKeyMap[action])
if !keyDiff.IsEmpty() { if !keyDiff.IsEmpty() {
return fmt.Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action) return Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action)
} }
} }

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"github.com/minio/minio/pkg/policy/condition" "github.com/minio/minio/pkg/policy/condition"
) )
@ -157,7 +156,7 @@ func (action Action) MarshalJSON() ([]byte, error) {
return json.Marshal(string(action)) return json.Marshal(string(action))
} }
return nil, fmt.Errorf("invalid action '%v'", action) return nil, Errorf("invalid action '%v'", action)
} }
// UnmarshalJSON - decodes JSON data to Action. // UnmarshalJSON - decodes JSON data to Action.
@ -170,7 +169,7 @@ func (action *Action) UnmarshalJSON(data []byte) error {
a := Action(s) a := Action(s)
if !a.IsValid() { if !a.IsValid() {
return fmt.Errorf("invalid action '%v'", s) return Errorf("invalid action '%v'", s)
} }
*action = a *action = a
@ -185,7 +184,7 @@ func parseAction(s string) (Action, error) {
return action, nil return action, nil
} }
return action, fmt.Errorf("unsupported action '%v'", s) return action, Errorf("unsupported action '%v'", s)
} }
// actionConditionKeyMap - holds mapping of supported condition key for an action. // actionConditionKeyMap - holds mapping of supported condition key for an action.

@ -53,7 +53,7 @@ func (actionSet ActionSet) Intersection(sset ActionSet) ActionSet {
// MarshalJSON - encodes ActionSet to JSON data. // MarshalJSON - encodes ActionSet to JSON data.
func (actionSet ActionSet) MarshalJSON() ([]byte, error) { func (actionSet ActionSet) MarshalJSON() ([]byte, error) {
if len(actionSet) == 0 { if len(actionSet) == 0 {
return nil, fmt.Errorf("empty action set") return nil, Errorf("empty actions not allowed")
} }
return json.Marshal(actionSet.ToSlice()) return json.Marshal(actionSet.ToSlice())
@ -87,7 +87,7 @@ func (actionSet *ActionSet) UnmarshalJSON(data []byte) error {
} }
if len(sset) == 0 { if len(sset) == 0 {
return fmt.Errorf("empty action set") return Errorf("empty actions not allowed")
} }
*actionSet = make(ActionSet) *actionSet = make(ActionSet)

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
) )
// Effect - policy statement effect Allow or Deny. // Effect - policy statement effect Allow or Deny.
@ -54,7 +53,7 @@ func (effect Effect) IsValid() bool {
// MarshalJSON - encodes Effect to JSON data. // MarshalJSON - encodes Effect to JSON data.
func (effect Effect) MarshalJSON() ([]byte, error) { func (effect Effect) MarshalJSON() ([]byte, error) {
if !effect.IsValid() { if !effect.IsValid() {
return nil, fmt.Errorf("invalid effect '%v'", effect) return nil, Errorf("invalid effect '%v'", effect)
} }
return json.Marshal(string(effect)) return json.Marshal(string(effect))
@ -69,7 +68,7 @@ func (effect *Effect) UnmarshalJSON(data []byte) error {
e := Effect(s) e := Effect(s)
if !e.IsValid() { if !e.IsValid() {
return fmt.Errorf("invalid effect '%v'", s) return Errorf("invalid effect '%v'", s)
} }
*effect = e *effect = e

@ -0,0 +1,39 @@
/*
* MinIO Cloud Storage, (C) 2019 MinIO, 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 policy
import "fmt"
// Error generic policy parse error type
type Error struct {
Err string
}
// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type policy.Error
func Errorf(format string, a ...interface{}) error {
return Error{Err: fmt.Sprintf(format, a...)}
}
// New initializes a new Error
func New(err string) error {
return Error{Err: err}
}
func (e Error) Error() string {
return e.Err
}

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"unicode/utf8" "unicode/utf8"
) )
@ -33,7 +32,7 @@ func (id ID) IsValid() bool {
// MarshalJSON - encodes ID to JSON data. // MarshalJSON - encodes ID to JSON data.
func (id ID) MarshalJSON() ([]byte, error) { func (id ID) MarshalJSON() ([]byte, error) {
if !id.IsValid() { if !id.IsValid() {
return nil, fmt.Errorf("invalid ID %v", id) return nil, Errorf("invalid ID %v", id)
} }
return json.Marshal(string(id)) return json.Marshal(string(id))
@ -48,7 +47,7 @@ func (id *ID) UnmarshalJSON(data []byte) error {
i := ID(s) i := ID(s)
if !i.IsValid() { if !i.IsValid() {
return fmt.Errorf("invalid ID %v", s) return Errorf("invalid ID %v", s)
} }
*id = i *id = i

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"io" "io"
) )
@ -78,7 +77,7 @@ func (policy Policy) IsEmpty() bool {
// isValid - checks if Policy is valid or not. // isValid - checks if Policy is valid or not.
func (policy Policy) isValid() error { func (policy Policy) isValid() error {
if policy.Version != DefaultVersion && policy.Version != "" { if policy.Version != DefaultVersion && policy.Version != "" {
return fmt.Errorf("invalid version '%v'", policy.Version) return Errorf("invalid version '%v'", policy.Version)
} }
for _, statement := range policy.Statements { for _, statement := range policy.Statements {
@ -108,7 +107,7 @@ func (policy Policy) isValid() error {
continue continue
} }
return fmt.Errorf("duplicate principal %v, actions %v, resouces %v found in statements %v, %v", return Errorf("duplicate principal %v, actions %v, resouces %v found in statements %v, %v",
principals, actions, resources, policy.Statements[i], statement) principals, actions, resources, policy.Statements[i], statement)
} }
} }

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"github.com/minio/minio-go/v6/pkg/set" "github.com/minio/minio-go/v6/pkg/set"
"github.com/minio/minio/pkg/wildcard" "github.com/minio/minio/pkg/wildcard"
@ -42,7 +41,7 @@ func (p Principal) Intersection(principal Principal) set.StringSet {
// MarshalJSON - encodes Principal to JSON data. // MarshalJSON - encodes Principal to JSON data.
func (p Principal) MarshalJSON() ([]byte, error) { func (p Principal) MarshalJSON() ([]byte, error) {
if !p.IsValid() { if !p.IsValid() {
return nil, fmt.Errorf("invalid principal %v", p) return nil, Errorf("invalid principal %v", p)
} }
// subtype to avoid recursive call to MarshalJSON() // subtype to avoid recursive call to MarshalJSON()
@ -75,7 +74,7 @@ func (p *Principal) UnmarshalJSON(data []byte) error {
} }
if s != "*" { if s != "*" {
return fmt.Errorf("invalid principal '%v'", s) return Errorf("invalid principal '%v'", s)
} }
sp.AWS = set.CreateStringSet("*") sp.AWS = set.CreateStringSet("*")

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"strings" "strings"
"github.com/minio/minio/pkg/policy/condition" "github.com/minio/minio/pkg/policy/condition"
@ -63,7 +62,7 @@ func (r Resource) Match(resource string, conditionValues map[string][]string) bo
// MarshalJSON - encodes Resource to JSON data. // MarshalJSON - encodes Resource to JSON data.
func (r Resource) MarshalJSON() ([]byte, error) { func (r Resource) MarshalJSON() ([]byte, error) {
if !r.IsValid() { if !r.IsValid() {
return nil, fmt.Errorf("invalid resource %v", r) return nil, Errorf("invalid resource %v", r)
} }
return json.Marshal(r.String()) return json.Marshal(r.String())
@ -93,11 +92,11 @@ func (r *Resource) UnmarshalJSON(data []byte) error {
// Validate - validates Resource is for given bucket or not. // Validate - validates Resource is for given bucket or not.
func (r Resource) Validate(bucketName string) error { func (r Resource) Validate(bucketName string) error {
if !r.IsValid() { if !r.IsValid() {
return fmt.Errorf("invalid resource") return Errorf("invalid resource")
} }
if !wildcard.Match(r.BucketName, bucketName) { if !wildcard.Match(r.BucketName, bucketName) {
return fmt.Errorf("bucket name does not match") return Errorf("bucket name does not match")
} }
return nil return nil
@ -106,14 +105,14 @@ func (r Resource) Validate(bucketName string) error {
// parseResource - parses string to Resource. // parseResource - parses string to Resource.
func parseResource(s string) (Resource, error) { func parseResource(s string) (Resource, error) {
if !strings.HasPrefix(s, ResourceARNPrefix) { if !strings.HasPrefix(s, ResourceARNPrefix) {
return Resource{}, fmt.Errorf("invalid resource '%v'", s) return Resource{}, Errorf("invalid resource '%v'", s)
} }
pattern := strings.TrimPrefix(s, ResourceARNPrefix) pattern := strings.TrimPrefix(s, ResourceARNPrefix)
tokens := strings.SplitN(pattern, "/", 2) tokens := strings.SplitN(pattern, "/", 2)
bucketName := tokens[0] bucketName := tokens[0]
if bucketName == "" { if bucketName == "" {
return Resource{}, fmt.Errorf("invalid resource format '%v'", s) return Resource{}, Errorf("invalid resource format '%v'", s)
} }
return Resource{ return Resource{

@ -69,7 +69,7 @@ func (resourceSet ResourceSet) Intersection(sset ResourceSet) ResourceSet {
// MarshalJSON - encodes ResourceSet to JSON data. // MarshalJSON - encodes ResourceSet to JSON data.
func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) { func (resourceSet ResourceSet) MarshalJSON() ([]byte, error) {
if len(resourceSet) == 0 { if len(resourceSet) == 0 {
return nil, fmt.Errorf("empty resource set") return nil, Errorf("empty resources not allowed")
} }
resources := []Resource{} resources := []Resource{}
@ -116,7 +116,7 @@ func (resourceSet *ResourceSet) UnmarshalJSON(data []byte) error {
} }
if _, found := (*resourceSet)[resource]; found { if _, found := (*resourceSet)[resource]; found {
return fmt.Errorf("duplicate resource '%v' found", s) return Errorf("duplicate resource '%v' found", s)
} }
resourceSet.Add(resource) resourceSet.Add(resource)

@ -18,7 +18,6 @@ package policy
import ( import (
"encoding/json" "encoding/json"
"fmt"
"strings" "strings"
"github.com/minio/minio/pkg/policy/condition" "github.com/minio/minio/pkg/policy/condition"
@ -67,36 +66,36 @@ func (statement Statement) IsAllowed(args Args) bool {
// isValid - checks whether statement is valid or not. // isValid - checks whether statement is valid or not.
func (statement Statement) isValid() error { func (statement Statement) isValid() error {
if !statement.Effect.IsValid() { if !statement.Effect.IsValid() {
return fmt.Errorf("invalid Effect %v", statement.Effect) return Errorf("invalid Effect %v", statement.Effect)
} }
if !statement.Principal.IsValid() { if !statement.Principal.IsValid() {
return fmt.Errorf("invalid Principal %v", statement.Principal) return Errorf("invalid Principal %v", statement.Principal)
} }
if len(statement.Actions) == 0 { if len(statement.Actions) == 0 {
return fmt.Errorf("Action must not be empty") return Errorf("Action must not be empty")
} }
if len(statement.Resources) == 0 { if len(statement.Resources) == 0 {
return fmt.Errorf("Resource must not be empty") return Errorf("Resource must not be empty")
} }
for action := range statement.Actions { for action := range statement.Actions {
if action.isObjectAction() { if action.isObjectAction() {
if !statement.Resources.objectResourceExists() { if !statement.Resources.objectResourceExists() {
return fmt.Errorf("unsupported Resource found %v for action %v", statement.Resources, action) return Errorf("unsupported Resource found %v for action %v", statement.Resources, action)
} }
} else { } else {
if !statement.Resources.bucketResourceExists() { if !statement.Resources.bucketResourceExists() {
return fmt.Errorf("unsupported Resource found %v for action %v", statement.Resources, action) return Errorf("unsupported Resource found %v for action %v", statement.Resources, action)
} }
} }
keys := statement.Conditions.Keys() keys := statement.Conditions.Keys()
keyDiff := keys.Difference(actionConditionKeyMap[action]) keyDiff := keys.Difference(actionConditionKeyMap[action])
if !keyDiff.IsEmpty() { if !keyDiff.IsEmpty() {
return fmt.Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action) return Errorf("unsupported condition keys '%v' used for action '%v'", keyDiff, action)
} }
} }

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