diff options
Diffstat (limited to 'actions/policy.go')
| -rw-r--r-- | actions/policy.go | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/actions/policy.go b/actions/policy.go index b7fe5a6..3baad72 100644 --- a/actions/policy.go +++ b/actions/policy.go @@ -22,6 +22,7 @@ package actions import ( "fmt" "log" + "os" "github.com/golang/protobuf/proto" "github.com/pkg/errors" @@ -41,6 +42,7 @@ var ( ErrOnlyProtector = errors.New("cannot remove the only protector for a policy") ErrAlreadyProtected = errors.New("policy already protected by protector") ErrNotProtected = errors.New("policy not protected by protector") + ErrAccessDeniedPossiblyV2 = errors.New("permission denied") ) // PurgeAllPolicies removes all policy keys on the filesystem from the kernel @@ -152,6 +154,15 @@ func GetPolicyFromPath(ctx *Context, path string) (*Policy, error) { // the path, and the data we get from the mountpoint. pathData, err := metadata.GetPolicy(path) if err != nil { + // On kernels that don't support v2 encryption policies, trying + // to open a directory with a v2 policy simply gave EACCES. This + // is ambiguous with other errors, but try to detect this case + // and show a better error message. + if os.IsPermission(err) && + filesystem.HaveReadAccessTo(path) && + !keyring.IsFsKeyringSupported(ctx.Mount) { + return nil, errors.Wrapf(ErrAccessDeniedPossiblyV2, "open %s", path) + } return nil, err } descriptor := pathData.KeyDescriptor |