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Make NAR header check more robust

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Changes

  std::bad_alloc

into

  bad archive: input doesn't look like a Nix archive
This commit is contained in:
Eelco Dolstra 2018-09-26 12:03:58 +02:00
parent 7ccdcc7fed
commit 44e86304b6
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GPG key ID: 8170B4726D7198DE
3 changed files with 5 additions and 4 deletions
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5
src/libutil/serialise.cc
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@ -268,16 +268,17 @@ void readPadding(size_t len, Source & source)
size_t readString(unsigned char * buf, size_t max, Source & source)
{
auto len = readNum<size_t>(source);
if (len > max) throw Error("string is too long");
if (len > max) throw SerialisationError("string is too long");
source(buf, len);
readPadding(len, source);
return len;
}
string readString(Source & source)
string readString(Source & source, size_t max)
{
auto len = readNum<size_t>(source);
if (len > max) throw SerialisationError("string is too long");
std::string res(len, 0);
source((unsigned char*) res.data(), len);
readPadding(len, source);