}

	keyID, b64Key := v[0], v[1]
	key, err := base64.StdEncoding.DecodeString(b64Key)
	if err != nil {
		return nil, err
	}
	return NewBuiltin(keyID, key)
}

// NewBuiltin returns a single-key KMS that derives new DEKs from the
// given key.
func NewBuiltin(keyID string, key []byte) (*KMS, error) {
	if len(key) != 32 {
		return nil, errors.New("kms: invalid key length " + strconv.Itoa(len(key)))
	}
	return &KMS{

func TestEncryptDecrypt(t *testing.T) {
	key, err := hex.DecodeString("ddedadb867afa3f73bd33c25499a723ed7f9f51172ee7b1b679e08dc795debcc")
	if err != nil {
		t.Fatalf("Failed to decode master key: %v", err)
	}
	KMS, err := kms.NewBuiltin("my-key", key)
	if err != nil {
		t.Fatalf("Failed to create KMS: %v", err)
	}

	for i, test := range encryptDecryptTests {
		ciphertext, err := Encrypt(KMS, bytes.NewReader(test.Data), test.Context)

		n := ir.NewDeclNameAt(src.NoXPos, ir.OTYPE, sym)
		n.SetType(typ)
		n.SetTypecheck(1)
		sym.Def = n
		return n
	})

	for _, s := range &builtinFuncs {
		ir.NewBuiltin(types.BuiltinPkg.Lookup(s.name), s.op)
	}

	for _, s := range &unsafeFuncs {
		ir.NewBuiltin(types.UnsafePkg.Lookup(s.name), s.op)
	}

	s := types.BuiltinPkg.Lookup("true")
	s.Def = ir.NewConstAt(src.NoXPos, s, types.UntypedBool, constant.MakeBool(true))

		}
		def(newBuiltin(id))
	}
}

// DefPredeclaredTestFuncs defines the assert and trace built-ins.
// These built-ins are intended for debugging and testing of this
// package only.
func DefPredeclaredTestFuncs() {
	if Universe.Lookup("assert") != nil {
		return // already defined
	}
	def(newBuiltin(_Assert))
	def(newBuiltin(_Trace))
}

func init() {

		}
		def(newBuiltin(id))
	}
}

// DefPredeclaredTestFuncs defines the assert and trace built-ins.
// These built-ins are intended for debugging and testing of this
// package only.
func DefPredeclaredTestFuncs() {
	if Universe.Lookup("assert") != nil {
		return // already defined
	}
	def(newBuiltin(_Assert))
	def(newBuiltin(_Trace))
}

func init() {

}

// A Builtin represents a built-in function.
// Builtins don't have a valid type.
type Builtin struct {
	object
	id builtinId
}

func newBuiltin(id builtinId) *Builtin {
	return &Builtin{object{name: predeclaredFuncs[id].name, typ: Typ[Invalid], color_: black}, id}
}

// Nil represents the predeclared value nil.
type Nil struct {
	object
}

}

// A Builtin represents a built-in function.
// Builtins don't have a valid type.
type Builtin struct {
	object
	id builtinId
}

func newBuiltin(id builtinId) *Builtin {
	return &Builtin{object{name: predeclaredFuncs[id].name, typ: Typ[Invalid], color_: black}, id}
}

// Nil represents the predeclared value nil.
type Nil struct {
	object
}