diff options
Diffstat (limited to 'nix/libutil/hash.cc')
| -rw-r--r-- | nix/libutil/hash.cc | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/nix/libutil/hash.cc b/nix/libutil/hash.cc index 7853acdd49..9b83ffcdd9 100644 --- a/nix/libutil/hash.cc +++ b/nix/libutil/hash.cc @@ -76,8 +76,11 @@ string printHash(const Hash & hash) Hash parseHash(HashType ht, const string & s) { Hash hash(ht); - if (s.length() != hash.hashSize * 2) - throw Error(format("invalid hash `%1%'") % s); + if (s.length() != hash.hashSize * 2) { + string algo = gcry_md_algo_name(ht); + throw Error(format("invalid %1% hash '%2%' (%3% bytes but expected %4%)") + % algo % s % (s.length() / 2) % hash.hashSize); + } for (unsigned int i = 0; i < hash.hashSize; i++) { string s2(s, i * 2, 2); if (!isxdigit(s2[0]) || !isxdigit(s2[1])) @@ -244,7 +247,7 @@ Hash hashFile(HashType ht, const Path & path) start(ht, ctx); AutoCloseFD fd = open(path.c_str(), O_RDONLY); - if (fd == -1) throw SysError(format("opening file `%1%'") % path); + if (fd == -1) throw SysError(format("computing hash of file `%1%'") % path); unsigned char buf[8192]; ssize_t n; |