44e6b8122d
The error handling of the ACL code relies on the presence of certain magic error messages. Since the error values are sent via RPC between older and newer consul agents we cannot just replace the magic values with typed errors and switch to type checks since this would break compatibility with older clients. Therefore, this patch moves all magic ACL error messages into the acl package and provides default error values and helper functions which determine the type of error.
68 lines
1.9 KiB
Go
68 lines
1.9 KiB
Go
package acl
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import (
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"errors"
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"strings"
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)
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// These error constants define the standard ACL error types. The values
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// must not be changed since the error values are sent via RPC calls
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// from older clients and may not have the correct type.
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const (
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errNotFound = "ACL not found"
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errRootDenied = "Cannot resolve root ACL"
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errDisabled = "ACL support disabled"
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errPermissionDenied = "Permission denied"
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)
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var (
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// ErrNotFound indicates there is no matching ACL.
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ErrNotFound = errors.New(errNotFound)
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// ErrRootDenied is returned when attempting to resolve a root ACL.
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ErrRootDenied = errors.New(errRootDenied)
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// ErrDisabled is returned when ACL changes are not permitted since
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// they are disabled.
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ErrDisabled = errors.New(errDisabled)
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// ErrPermissionDenied is returned when an ACL based rejection
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// happens.
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ErrPermissionDenied = PermissionDeniedError{}
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)
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// IsErrNotFound checks if the given error message is comparable to
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// ErrNotFound.
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func IsErrNotFound(err error) bool {
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return err != nil && strings.Contains(err.Error(), errNotFound)
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}
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// IsErrRootDenied checks if the given error messge is comparable to
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// ErrRootDenied.
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func IsErrRootDenied(err error) bool {
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return err != nil && strings.Contains(err.Error(), errRootDenied)
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}
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// IsErrDisabled checks if the given error message is comparable to
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// ErrDisabled.
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func IsErrDisabled(err error) bool {
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return err != nil && strings.Contains(err.Error(), errDisabled)
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}
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// IsErrPermissionDenied checks if the given error message is comparable
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// to ErrPermissionDenied.
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func IsErrPermissionDenied(err error) bool {
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return err != nil && strings.Contains(err.Error(), errPermissionDenied)
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}
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type PermissionDeniedError struct {
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Cause string
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}
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func (e PermissionDeniedError) Error() string {
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if e.Cause != "" {
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return errPermissionDenied + ": " + e.Cause
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}
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return errPermissionDenied
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}
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