session: Fix verb types

Previously, container and object verb types were `int8` enums which is
much narrower than the protocol definition. Also, corresponding token
were converted from derived uint32 type w/o overflow check.

Now types are `int32` and any bigger value is denied.

Signed-off-by: Leonard Lyubich <[email protected]>

session/container.go

@@ -3,6 +3,7 @@ package session
 import (
  "errors"
  "fmt"
+ "math"
 
  "github.com/nspcc-dev/neofs-api-go/v2/refs"
  "github.com/nspcc-dev/neofs-api-go/v2/session"
@@ -62,7 +63,11 @@ func (x *Container) readContext(c session.TokenContext, checkFieldPresence bool)
  return errors.New("container conflicts with wildcard flag")
  }
 
- x.verb = ContainerVerb(cCnr.Verb())
+ verb := cCnr.Verb()
+ if verb > math.MaxInt32 {
+ return fmt.Errorf("verb %d overflows int32", verb)
+ }
+ x.verb = ContainerVerb(verb)
 
  return nil
 }
@@ -207,7 +212,7 @@ func (x Container) AppliedTo(cnr cid.ID) bool {
 }
 
 // ContainerVerb enumerates container operations.
-type ContainerVerb int8
+type ContainerVerb int32
 
 const (
  _ ContainerVerb = iota

session/object.go

@@ -3,6 +3,7 @@ package session
 import (
  "errors"
  "fmt"
+ "math"
  "slices"
 
  "github.com/nspcc-dev/neofs-api-go/v2/refs"
@@ -76,7 +77,11 @@ func (x *Object) readContext(c session.TokenContext, checkFieldPresence bool) er
  x.objs = nil
  }
 
- x.verb = ObjectVerb(cObj.GetVerb())
+ verb := cObj.GetVerb()
+ if verb > math.MaxInt32 {
+ return fmt.Errorf("verb %d overflows int32", verb)
+ }
+ x.verb = ObjectVerb(verb)
 
  return nil
 }
@@ -266,7 +271,7 @@ func (x Object) AssertObject(obj oid.ID) bool {
 }
 
 // ObjectVerb enumerates object operations.
-type ObjectVerb int8
+type ObjectVerb int32
 
 const (
  _ ObjectVerb = iota