// if the returned array is empty, then make a call to sslerr.Error()
func (d *digest) Sum(b []byte) []byte {
buf := make([]C.uchar, d.Size())
// make a copy of the pointer, so our context does not get freed.
// this allows further writes.
ctxTmp := C.SHA256_CTX(d.ctx)
if d.is224 {
if C.SHA224_Final(&buf[0], &ctxTmp) != 1 {
return make([]byte, 0)
}
} else {
if C.SHA256_Final(&buf[0], &ctxTmp) != 1 {
return make([]byte, 0)
}
}
var result []byte
if b != nil {
result = make([]byte, 0)
} else {
result = b
}
for _, value := range buf {
result = append(result, byte(value))
}
return result
}
func (self *SHA256Hash) Sum(b []byte) []byte {
digest := make([]C.uchar, self.Size())
// make a copy of the pointer, so our context does not get freed.
// this allows further writes.
// TODO perhaps we should think about runtime.SetFinalizer to free the context?
s_tmp := C.SHA256_CTX(self.sha)
if C.SHA256_Final(&digest[0], &s_tmp) != 1 {
panic("couldn't finalize digest")
}
var result []byte
if b != nil {
result = make([]byte, 0)
} else {
result = b
}
for _, value := range digest {
result = append(result, byte(value))
}
return result
}