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Mark content-addressed paths in the Nix database and in .narinfo

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This allows such paths to be imported without signatures.
This commit is contained in:
Eelco Dolstra 2016-08-03 13:17:11 +02:00
parent 36a51ecab3
commit d961c29c9c
11 changed files with 146 additions and 43 deletions
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60
src/libstore/store-api.cc
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@ -202,6 +202,22 @@ Path Store::makeFixedOutputPath(bool recursive,
}
Path Store::makeTextPath(const string & name, const Hash & hash,
const PathSet & references) const
{
assert(hash.type == htSHA256);
/* Stuff the references (if any) into the type. This is a bit
hacky, but we can't put them in `s' since that would be
ambiguous. */
string type = "text";
for (auto & i : references) {
type += ":";
type += i;
}
return makeStorePath(type, hash, name);
}
std::pair<Path, Hash> Store::computeStorePathForPath(const Path & srcPath,
bool recursive, HashType hashAlgo, PathFilter & filter) const
{
@ -215,16 +231,7 @@ std::pair<Path, Hash> Store::computeStorePathForPath(const Path & srcPath,
Path Store::computeStorePathForText(const string & name, const string & s,
const PathSet & references) const
{
Hash hash = hashString(htSHA256, s);
/* Stuff the references (if any) into the type. This is a bit
hacky, but we can't put them in `s' since that would be
ambiguous. */
string type = "text";
for (auto & i : references) {
type += ":";
type += i;
}
return makeStorePath(type, hash, name);
return makeTextPath(name, hashString(htSHA256, s), references);
}
@ -432,9 +439,38 @@ void ValidPathInfo::sign(const SecretKey & secretKey)
}
unsigned int ValidPathInfo::checkSignatures(const PublicKeys & publicKeys) const
bool ValidPathInfo::isContentAddressed(const Store & store) const
{
unsigned int good = 0;
auto warn = [&]() {
printMsg(lvlError, format("warning: path ‘%s’ claims to be content-addressed but isn't") % path);
};
if (hasPrefix(ca, "text:")) {
auto hash = parseHash(std::string(ca, 5));
if (store.makeTextPath(storePathToName(path), hash, references) == path)
return true;
else
warn();
}
else if (hasPrefix(ca, "fixed:")) {
bool recursive = ca.compare(6, 2, "r:") == 0;
auto hash = parseHash(std::string(ca, recursive ? 8 : 6));
if (store.makeFixedOutputPath(recursive, hash, storePathToName(path)) == path)
return true;
else
warn();
}
return false;
}
size_t ValidPathInfo::checkSignatures(const Store & store, const PublicKeys & publicKeys) const
{
if (isContentAddressed(store)) return maxSigs;
size_t good = 0;
for (auto & sig : sigs)
if (checkSignature(publicKeys, sig))
good++;