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Return error on invalid length

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Flakebi
2018-12-24 00:23:52 +01:00
parent c6b8e90a50
commit 8a64254c95
1 changed files with 3 additions and 0 deletions
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3
src/lib.rs
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@@ -374,6 +374,9 @@ fn from_der_(i: &[u8], start_offset: usize)
let soff = start_offset + index; let soff = start_offset + index;
let (tag, constructed, class) = decode_tag(i, &mut index); let (tag, constructed, class) = decode_tag(i, &mut index);
let len = decode_length(i, &mut index)?; let len = decode_length(i, &mut index)?;
if i.len() < index + len {
return Err(ASN1DecodeErr::LengthTooLarge(index + len));
}
let body = &i[index .. (index + len)]; let body = &i[index .. (index + len)];
if class != ASN1Class::Universal { if class != ASN1Class::Universal {