// If isPrivate is false, the public key is at privateKey[32:].
//
// Otherwise the private key is at privateKey[0:32] and the public key is of course
// as always at privateKey[32:64].
func LoadEd25519Key(v []interface{}, privateKey *[64]byte) (isPrivate bool, err error) {
r := sx.Q1bsyt(v, "private-key ed25519")
if r == nil {
r = sx.Q1bsyt(v, "public-key ed25519")
} else {
isPrivate = true
}
if r == nil {
return false, ErrMalformedKey
}
b, ok := r[0].(string)
if !ok || (isPrivate && len(b) != 64) || (!isPrivate && len(b) != 32) {
return false, ErrMalformedKey
}
if isPrivate {
copy(privateKey[:], b)
} else {
copy(privateKey[32:], b)
}
return
}
func LoadFileInfo(x []interface{}) (*FileInfo, error) {
fi := &FileInfo{}
r := sx.Q1bsyt(x, "file-representation")
if r == nil {
return nil, ErrMalformedFileInfo
}
// length
lv := sx.Q1bsyt(r, "length")
if lv == nil || len(lv) == 0 {
return nil, ErrMalformedFileInfo
}
switch lvi := lv[0].(type) {
case int:
fi.Length = int64(lvi)
case int64:
fi.Length = lvi
default:
return nil, ErrMalformedFileInfo
}
// hash
ht, h, err := LoadHash(r)
if err != nil {
return nil, ErrMalformedFileInfo
}
fi.Hash = h
fi.HashType = ht
// filename (optional)
fnv := sx.Q1bsyt(r, "filename")
if fnv != nil {
if len(fnv) == 0 {
return nil, ErrMalformedFileInfo
}
if fnvs, ok := fnv[0].(string); ok {
fi.Filename = fnvs
} else {
return nil, ErrMalformedFileInfo
}
}
return fi, nil
}
func TestQuery(t *testing.T) {
if !sx.Hhy([]interface{}{"alpha"}, "alpha") {
t.Fatalf("...")
}
xs, err := sx.SX.Parse([]byte(`
(alpha)
(beta
(x)
(y 42)
(z))
(gamma)
(delta)
`))
if err != nil {
t.Fatalf("failed to parse: %v", err)
}
if !sx.Hhy(xs[0], "alpha") {
t.Fatalf("...")
}
if sx.Q1bhy(xs, "alpha") == nil {
t.Fatalf("...")
}
if sx.Q1bhyt(xs, "beta") == nil {
t.Fatalf("...")
}
r := sx.Q1bsyt(xs, "beta y")
if r == nil {
t.Fatalf("no match")
}
out, err := sx.SXCanonical.String(r)
if err != nil {
t.Fatalf("cannot serialize: %v", err)
}
if out != "42 " {
t.Fatalf("mismatch: %#v", out)
}
}
func LoadHash(x []interface{}) (HashType, []byte, error) {
r := sx.Q1bsyt(x, "hash")
if r == nil || len(r) < 2 {
return "", nil, ErrMalformedHash
}
hts, ok := r[0].(string)
if !ok {
return "", nil, ErrMalformedHash
}
b, ok := r[1].(string)
if !ok {
return "", nil, ErrMalformedHash
}
ht, ok := ParseHashType(hts)
if !ok {
return "", nil, ErrMalformedHash
}
return ht, []byte(b), nil
}