// NewAttribute allocates a Attribute and returns a pointer to it.
// Note that this is merely a convience function, as values returned
// from the HSM are not converted back to Go values, those are just raw
// byte slices.
func NewAttribute(typ uint, x interface{}) *Attribute {
// This function nicely transforms *to* an attribute, but there is
// no corresponding function that transform back *from* an attribute,
// which in PKCS#11 is just an byte array.
a := new(Attribute)
a.Type = typ
if x == nil {
return a
}
switch x.(type) {
case bool: // create bbool
if x.(bool) {
a.Value = []byte{1}
break
}
a.Value = []byte{0}
case uint, int:
var y uint
if _, ok := x.(int); ok {
y = uint(x.(int))
}
if _, ok := x.(uint); ok {
y = x.(uint)
}
// TODO(miek): ugly!
switch int(C.Sizeof()) {
case 4:
a.Value = make([]byte, 4)
a.Value[0] = byte(y)
a.Value[1] = byte(y >> 8)
a.Value[2] = byte(y >> 16)
a.Value[3] = byte(y >> 24)
case 8:
a.Value = make([]byte, 8)
a.Value[0] = byte(y)
a.Value[1] = byte(y >> 8)
a.Value[2] = byte(y >> 16)
a.Value[3] = byte(y >> 24)
a.Value[4] = byte(y >> 32)
a.Value[5] = byte(y >> 40)
a.Value[6] = byte(y >> 48)
a.Value[7] = byte(y >> 56)
}
case string:
a.Value = []byte(x.(string))
case []byte: // just copy
a.Value = x.([]byte)
case time.Time: // for CKA_DATE
a.Value = cDate(x.(time.Time))
default:
panic("pkcs11: unhandled attribute type")
}
return a
}
// NewAttribute allocates a Attribute and returns a pointer to it.
// Note that this is merely a convience function, as values returned
// from the HSM are not converted back to Go values, those are just raw
// byte slices.
func NewAttribute(typ uint, x interface{}) *Attribute {
a := new(Attribute)
a.Type = typ
if x == nil {
return a
}
switch x.(type) {
case bool: // create bbool
if x.(bool) {
a.Value = []byte{1}
break
}
a.Value = []byte{0}
case uint, int:
var y uint
if _, ok := x.(int); ok {
y = uint(x.(int))
}
if _, ok := x.(uint); ok {
y = x.(uint)
}
switch int(C.Sizeof()) {
case 4:
a.Value = make([]byte, 4)
a.Value[0] = byte(y)
a.Value[1] = byte(y >> 8)
a.Value[2] = byte(y >> 16)
a.Value[3] = byte(y >> 24)
case 8:
a.Value = make([]byte, 8)
a.Value[0] = byte(y)
a.Value[1] = byte(y >> 8)
a.Value[2] = byte(y >> 16)
a.Value[3] = byte(y >> 24)
a.Value[4] = byte(y >> 32)
a.Value[5] = byte(y >> 40)
a.Value[6] = byte(y >> 48)
a.Value[7] = byte(y >> 56)
}
case string:
a.Value = []byte(x.(string))
case []byte: // just copy
a.Value = x.([]byte)
case time.Time: // for CKA_DATE
a.Value = cDate(x.(time.Time))
default:
panic("pkcs11: unhandled attribute type")
}
return a
}
