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WIP: Make Hash always store a valid hash type

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This commit is contained in:
John Ericson 2020-06-19 18:41:33 +00:00
parent 984e521392
commit 507aa48739
29 changed files with 126 additions and 124 deletions
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4
perl/lib/Nix/Store.xs
View file

@ -80,7 +80,7 @@ SV * queryReferences(char * path)
SV * queryPathHash(char * path)
PPCODE:
try {
auto s = store()->queryPathInfo(store()->parseStorePath(path))->narHash.to_string(Base32, true);
auto s = store()->queryPathInfo(store()->parseStorePath(path))->narHash->to_string(Base32, true);
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
} catch (Error & e) {
croak("%s", e.what());
@ -106,7 +106,7 @@ SV * queryPathInfo(char * path, int base32)
XPUSHs(&PL_sv_undef);
else
XPUSHs(sv_2mortal(newSVpv(store()->printStorePath(*info->deriver).c_str(), 0)));
auto s = info->narHash.to_string(base32 ? Base32 : Base16, true);
auto s = info->narHash->to_string(base32 ? Base32 : Base16, true);
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
mXPUSHi(info->registrationTime);
mXPUSHi(info->narSize);

8
src/libexpr/primops.cc
View file

@ -1122,7 +1122,7 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
static void addPath(EvalState & state, const Pos & pos, const string & name, const Path & path_,
Value * filterFun, FileIngestionMethod method, const Hash & expectedHash, Value & v)
Value * filterFun, FileIngestionMethod method, const std::optional<Hash> expectedHash, Value & v)
{
const auto path = evalSettings.pureEval && expectedHash ?
path_ :
@ -1153,7 +1153,7 @@ static void addPath(EvalState & state, const Pos & pos, const string & name, con
std::optional<StorePath> expectedStorePath;
if (expectedHash)
expectedStorePath = state.store->makeFixedOutputPath(method, expectedHash, name);
expectedStorePath = state.store->makeFixedOutputPath(method, *expectedHash, name);
Path dstPath;
if (!expectedHash || !state.store->isValidPath(*expectedStorePath)) {
dstPath = state.store->printStorePath(settings.readOnlyMode
@ -1187,7 +1187,7 @@ static void prim_filterSource(EvalState & state, const Pos & pos, Value * * args
.nixCode = NixCode { .errPos = pos }
});
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, Hash(), v);
addPath(state, pos, std::string(baseNameOf(path)), path, args[0], FileIngestionMethod::Recursive, std::nullopt, v);
}
static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value & v)
@ -1197,7 +1197,7 @@ static void prim_path(EvalState & state, const Pos & pos, Value * * args, Value
string name;
Value * filterFun = nullptr;
auto method = FileIngestionMethod::Recursive;
Hash expectedHash;
Hash expectedHash(htSHA256);
for (auto & attr : *args[0]->attrs) {
const string & n(attr.name);

4
src/libexpr/primops/fetchTree.cc
View file

@ -23,7 +23,7 @@ void emitTreeAttrs(
assert(tree.info.narHash);
mkString(*state.allocAttr(v, state.symbols.create("narHash")),
tree.info.narHash.to_string(SRI, true));
tree.info.narHash->to_string(SRI, true));
if (input->getRev()) {
mkString(*state.allocAttr(v, state.symbols.create("rev")), input->getRev()->gitRev());
@ -147,7 +147,7 @@ static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
: hashFile(htSHA256, path);
if (hash != *expectedHash)
throw Error((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n wanted: %s\n got: %s",
*url, expectedHash->to_string(Base32, true), hash.to_string(Base32, true));
*url, expectedHash->to_string(Base32, true), hash->to_string(Base32, true));
}
if (state.allowedPaths)

2
src/libfetchers/tree-info.cc
View file

@ -8,7 +8,7 @@ namespace nix::fetchers {
StorePath TreeInfo::computeStorePath(Store & store) const
{
assert(narHash);
return store.makeFixedOutputPath(FileIngestionMethod::Recursive, narHash, "source");
return store.makeFixedOutputPath(FileIngestionMethod::Recursive, *narHash, "source");
}
}

2
src/libfetchers/tree-info.hh
View file

@ -11,7 +11,7 @@ namespace nix::fetchers {
struct TreeInfo
{
Hash narHash;
std::optional<Hash> narHash;
std::optional<uint64_t> revCount;
std::optional<time_t> lastModified;

6
src/libstore/binary-cache-store.cc
View file

@ -181,7 +181,7 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, Source & narSource
((1.0 - (double) narCompressed->size() / nar->size()) * 100.0),
duration);
narInfo->url = "nar/" + narInfo->fileHash.to_string(Base32, false) + ".nar"
narInfo->url = "nar/" + narInfo->fileHash->to_string(Base32, false) + ".nar"
+ (compression == "xz" ? ".xz" :
compression == "bzip2" ? ".bz2" :
compression == "br" ? ".br" :
@ -338,7 +338,7 @@ StorePath BinaryCacheStore::addToStore(const string & name, const Path & srcPath
method for very large paths, but `copyPath' is mainly used for
small files. */
StringSink sink;
Hash h;
std::optional<Hash> h;
if (method == FileIngestionMethod::Recursive) {
dumpPath(srcPath, sink, filter);
h = hashString(hashAlgo, *sink.s);
@ -348,7 +348,7 @@ StorePath BinaryCacheStore::addToStore(const string & name, const Path & srcPath
h = hashString(hashAlgo, s);
}
ValidPathInfo info(makeFixedOutputPath(method, h, name));
ValidPathInfo info(makeFixedOutputPath(method, *h, name));
auto source = StringSource { *sink.s };
addToStore(info, source, repair, CheckSigs, nullptr);

12
src/libstore/build.cc
View file

@ -3730,8 +3730,8 @@ void DerivationGoal::registerOutputs()
/* Check the hash. In hash mode, move the path produced by
the derivation to its content-addressed location. */
Hash h2 = i.second.hash->method == FileIngestionMethod::Recursive
? hashPath(*i.second.hash->hash.type, actualPath).first
: hashFile(*i.second.hash->hash.type, actualPath);
? hashPath(i.second.hash->hash.type, actualPath).first
: hashFile(i.second.hash->hash.type, actualPath);
auto dest = worker.store.makeFixedOutputPath(i.second.hash->method, h2, i.second.path.name());
@ -3777,8 +3777,10 @@ void DerivationGoal::registerOutputs()
time. The hash is stored in the database so that we can
verify later on whether nobody has messed with the store. */
debug("scanning for references inside '%1%'", path);
HashResult hash;
auto references = worker.store.parseStorePathSet(scanForReferences(actualPath, worker.store.printStorePathSet(referenceablePaths), hash));
// HashResult hash;
auto pathSetAndHash = scanForReferences(actualPath, worker.store.printStorePathSet(referenceablePaths));
auto references = worker.store.parseStorePathSet(pathSetAndHash.first);
HashResult hash = pathSetAndHash.second;
if (buildMode == bmCheck) {
if (!worker.store.isValidPath(worker.store.parseStorePath(path))) continue;
@ -4997,7 +4999,7 @@ bool Worker::pathContentsGood(const StorePath & path)
if (!pathExists(store.printStorePath(path)))
res = false;
else {
HashResult current = hashPath(*info->narHash.type, store.printStorePath(path));
HashResult current = hashPath(info->narHash->type, store.printStorePath(path));
Hash nullHash(htSHA256);
res = info->narHash == nullHash || info->narHash == current.first;
}

2
src/libstore/builtins/fetchurl.cc
View file

@ -65,7 +65,7 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData)
if (!hasSuffix(hashedMirror, "/")) hashedMirror += '/';
auto ht = parseHashTypeOpt(getAttr("outputHashAlgo"));
auto h = Hash(getAttr("outputHash"), ht);
fetch(hashedMirror + printHashType(*h.type) + "/" + h.to_string(Base16, false));
fetch(hashedMirror + printHashType(h.type) + "/" + h.to_string(Base16, false));
return;
} catch (Error & e) {
debug(e.what());

4
src/libstore/daemon.cc
View file

@ -314,7 +314,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
logger->startWork();
auto hash = store->queryPathInfo(path)->narHash;
logger->stopWork();
to << hash.to_string(Base16, false);
to << hash->to_string(Base16, false);
break;
}
@ -646,7 +646,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
if (GET_PROTOCOL_MINOR(clientVersion) >= 17)
to << 1;
to << (info->deriver ? store->printStorePath(*info->deriver) : "")
<< info->narHash.to_string(Base16, false);
<< info->narHash->to_string(Base16, false);
writeStorePaths(*store, to, info->references);
to << info->registrationTime << info->narSize;
if (GET_PROTOCOL_MINOR(clientVersion) >= 16) {

2
src/libstore/derivations.cc
View file

@ -9,7 +9,7 @@
namespace nix {
std::string DerivationOutputHash::printMethodAlgo() const {
return makeFileIngestionPrefix(method) + printHashType(*hash.type);
return makeFileIngestionPrefix(method) + printHashType(hash.type);
}

4
src/libstore/export-import.cc
View file

@ -55,9 +55,9 @@ void Store::exportPath(const StorePath & path, Sink & sink)
filesystem corruption from spreading to other machines.
Don't complain if the stored hash is zero (unknown). */
Hash hash = hashAndWriteSink.currentHash();
if (hash != info->narHash && info->narHash != Hash(*info->narHash.type))
if (hash != info->narHash && info->narHash != Hash(info->narHash->type))
throw Error("hash of path '%s' has changed from '%s' to '%s'!",
printStorePath(path), info->narHash.to_string(Base32, true), hash.to_string(Base32, true));
printStorePath(path), info->narHash->to_string(Base32, true), hash.to_string(Base32, true));
hashAndWriteSink
<< exportMagic

4
src/libstore/legacy-ssh-store.cc
View file

@ -113,7 +113,7 @@ struct LegacySSHStore : public Store
if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 4) {
auto s = readString(conn->from);
info->narHash = s.empty() ? Hash() : Hash(s);
info->narHash = s.empty() ? std::optional<Hash>{} : Hash(s);
conn->from >> info->ca;
info->sigs = readStrings<StringSet>(conn->from);
}
@ -139,7 +139,7 @@ struct LegacySSHStore : public Store
<< cmdAddToStoreNar
<< printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false);
<< info.narHash->to_string(Base16, false);
writeStorePaths(*this, conn->to, info.references);
conn->to
<< info.registrationTime

26
src/libstore/local-store.cc
View file

@ -586,7 +586,7 @@ uint64_t LocalStore::addValidPath(State & state,
state.stmtRegisterValidPath.use()
(printStorePath(info.path))
(info.narHash.to_string(Base16, true))
(info.narHash->to_string(Base16, true))
(info.registrationTime == 0 ? time(0) : info.registrationTime)
(info.deriver ? printStorePath(*info.deriver) : "", (bool) info.deriver)
(info.narSize, info.narSize != 0)
@ -686,7 +686,7 @@ void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info)
{
state.stmtUpdatePathInfo.use()
(info.narSize, info.narSize != 0)
(info.narHash.to_string(Base16, true))
(info.narHash->to_string(Base16, true))
(info.ultimate ? 1 : 0, info.ultimate)
(concatStringsSep(" ", info.sigs), !info.sigs.empty())
(info.ca, !info.ca.empty())
@ -897,7 +897,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
StorePathSet paths;
for (auto & i : infos) {
assert(i.narHash.type == htSHA256);
assert(i.narHash && i.narHash->type == htSHA256);
if (isValidPath_(*state, i.path))
updatePathInfo(*state, i);
else
@ -1010,7 +1010,7 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
if (hashResult.first != info.narHash)
throw Error("hash mismatch importing path '%s';\n wanted: %s\n got: %s",
printStorePath(info.path), info.narHash.to_string(Base32, true), hashResult.first.to_string(Base32, true));
printStorePath(info.path), info.narHash->to_string(Base32, true), hashResult.first.to_string(Base32, true));
if (hashResult.second != info.narSize)
throw Error("size mismatch importing path '%s';\n wanted: %s\n got: %s",
@ -1067,12 +1067,12 @@ StorePath LocalStore::addToStoreFromDump(const string & dump, const string & nam
the path in the database. We may just have computed it
above (if called with recursive == true and hashAlgo ==
sha256); otherwise, compute it here. */
HashResult hash;
if (method == FileIngestionMethod::Recursive) {
hash.first = hashAlgo == htSHA256 ? h : hashString(htSHA256, dump);
hash.second = dump.size();
} else
hash = hashPath(htSHA256, realPath);
HashResult hash = method == FileIngestionMethod::Recursive
? HashResult {
hashAlgo == htSHA256 ? h : hashString(htSHA256, dump),
dump.size(),
}
: hashPath(htSHA256, realPath);
optimisePath(realPath); // FIXME: combine with hashPath()
@ -1255,9 +1255,9 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
std::unique_ptr<AbstractHashSink> hashSink;
if (info->ca == "" || !info->references.count(info->path))
hashSink = std::make_unique<HashSink>(*info->narHash.type);
hashSink = std::make_unique<HashSink>(info->narHash->type);
else
hashSink = std::make_unique<HashModuloSink>(*info->narHash.type, std::string(info->path.hashPart()));
hashSink = std::make_unique<HashModuloSink>(info->narHash->type, std::string(info->path.hashPart()));
dumpPath(Store::toRealPath(i), *hashSink);
auto current = hashSink->finish();
@ -1266,7 +1266,7 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
logError({
.name = "Invalid hash - path modified",
.hint = hintfmt("path '%s' was modified! expected hash '%s', got '%s'",
printStorePath(i), info->narHash.to_string(Base32, true), current.first.to_string(Base32, true))
printStorePath(i), info->narHash->to_string(Base32, true), current.first.to_string(Base32, true))
});
if (repair) repairPath(i); else errors = true;
} else {

4
src/libstore/nar-info-disk-cache.cc
View file

@ -230,9 +230,9 @@ public:
(std::string(info->path.name()))
(narInfo ? narInfo->url : "", narInfo != 0)
(narInfo ? narInfo->compression : "", narInfo != 0)
(narInfo && narInfo->fileHash ? narInfo->fileHash.to_string(Base32, true) : "", narInfo && narInfo->fileHash)
(narInfo && narInfo->fileHash ? narInfo->fileHash->to_string(Base32, true) : "", narInfo && narInfo->fileHash)
(narInfo ? narInfo->fileSize : 0, narInfo != 0 && narInfo->fileSize)
(info->narHash.to_string(Base32, true))
(info->narHash->to_string(Base32, true))
(info->narSize)
(concatStringsSep(" ", info->shortRefs()))
(info->deriver ? std::string(info->deriver->to_string()) : "", (bool) info->deriver)

27
src/libstore/nar-info.cc
View file

@ -7,15 +7,14 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
: ValidPathInfo(StorePath(StorePath::dummy)) // FIXME: hack
{
auto corrupt = [&]() {
throw Error("NAR info file '%1%' is corrupt", whence);
return Error("NAR info file '%1%' is corrupt", whence);
};
auto parseHashField = [&](const string & s) {
try {
return Hash(s);
} catch (BadHash &) {
corrupt();
return Hash(); // never reached
throw corrupt();
}
};
@ -25,12 +24,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
while (pos < s.size()) {
size_t colon = s.find(':', pos);
if (colon == std::string::npos) corrupt();
if (colon == std::string::npos) throw corrupt();
std::string name(s, pos, colon - pos);
size_t eol = s.find('\n', colon + 2);
if (eol == std::string::npos) corrupt();
if (eol == std::string::npos) throw corrupt();
std::string value(s, colon + 2, eol - colon - 2);
@ -45,16 +44,16 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "FileHash")
fileHash = parseHashField(value);
else if (name == "FileSize") {
if (!string2Int(value, fileSize)) corrupt();
if (!string2Int(value, fileSize)) throw corrupt();
}
else if (name == "NarHash")
narHash = parseHashField(value);
else if (name == "NarSize") {
if (!string2Int(value, narSize)) corrupt();
if (!string2Int(value, narSize)) throw corrupt();
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");
if (!references.empty()) corrupt();
if (!references.empty()) throw corrupt();
for (auto & r : refs)
references.insert(StorePath(r));
}
@ -67,7 +66,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "Sig")
sigs.insert(value);
else if (name == "CA") {
if (!ca.empty()) corrupt();
if (!ca.empty()) throw corrupt();
ca = value;
}
@ -76,7 +75,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
if (compression == "") compression = "bzip2";
if (!havePath || url.empty() || narSize == 0 || !narHash) corrupt();
if (!havePath || url.empty() || narSize == 0 || !narHash) throw corrupt();
}
std::string NarInfo::to_string(const Store & store) const
@ -86,11 +85,11 @@ std::string NarInfo::to_string(const Store & store) const
res += "URL: " + url + "\n";
assert(compression != "");
res += "Compression: " + compression + "\n";
assert(fileHash.type == htSHA256);
res += "FileHash: " + fileHash.to_string(Base32, true) + "\n";
assert(fileHash && fileHash->type == htSHA256);
res += "FileHash: " + fileHash->to_string(Base32, true) + "\n";
res += "FileSize: " + std::to_string(fileSize) + "\n";
assert(narHash.type == htSHA256);
res += "NarHash: " + narHash.to_string(Base32, true) + "\n";
assert(narHash && narHash->type == htSHA256);
res += "NarHash: " + narHash->to_string(Base32, true) + "\n";
res += "NarSize: " + std::to_string(narSize) + "\n";
res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";

2
src/libstore/nar-info.hh
View file

@ -10,7 +10,7 @@ struct NarInfo : ValidPathInfo
{
std::string url;
std::string compression;
Hash fileHash;
std::optional<Hash> fileHash;
uint64_t fileSize = 0;
std::string system;

8
src/libstore/references.cc
View file

@ -79,8 +79,8 @@ void RefScanSink::operator () (const unsigned char * data, size_t len)
}
PathSet scanForReferences(const string & path,
const PathSet & refs, HashResult & hash)
std::pair<PathSet, HashResult> scanForReferences(const string & path,
const PathSet & refs)
{
RefScanSink sink;
std::map<string, Path> backMap;
@ -112,9 +112,9 @@ PathSet scanForReferences(const string & path,
found.insert(j->second);
}
hash = sink.hashSink.finish();
auto hash = sink.hashSink.finish();
return found;
return std::pair<PathSet, HashResult>(found, hash);
}

3
src/libstore/references.hh
View file

@ -5,8 +5,7 @@
namespace nix {
PathSet scanForReferences(const Path & path, const PathSet & refs,
HashResult & hash);
std::pair<PathSet, HashResult> scanForReferences(const Path & path, const PathSet & refs);
struct RewritingSink : Sink
{

2
src/libstore/remote-store.cc
View file

@ -462,7 +462,7 @@ void RemoteStore::addToStore(const ValidPathInfo & info, Source & source,
conn->to << wopAddToStoreNar
<< printStorePath(info.path)
<< (info.deriver ? printStorePath(*info.deriver) : "")
<< info.narHash.to_string(Base16, false);
<< info.narHash->to_string(Base16, false);
writeStorePaths(*this, conn->to, info.references);
conn->to << info.registrationTime << info.narSize
<< info.ultimate << info.sigs << info.ca

8
src/libstore/store-api.cc
View file

@ -430,7 +430,7 @@ string Store::makeValidityRegistration(const StorePathSet & paths,
auto info = queryPathInfo(i);
if (showHash) {
s += info->narHash.to_string(Base16, false) + "\n";
s += info->narHash->to_string(Base16, false) + "\n";
s += (format("%1%\n") % info->narSize).str();
}
@ -462,7 +462,7 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & store
auto info = queryPathInfo(storePath);
jsonPath
.attr("narHash", info->narHash.to_string(hashBase, true))
.attr("narHash", info->narHash->to_string(hashBase, true))
.attr("narSize", info->narSize);
{
@ -505,7 +505,7 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & store
if (!narInfo->url.empty())
jsonPath.attr("url", narInfo->url);
if (narInfo->fileHash)
jsonPath.attr("downloadHash", narInfo->fileHash.to_string(Base32, true));
jsonPath.attr("downloadHash", narInfo->fileHash->to_string(Base32, true));
if (narInfo->fileSize)
jsonPath.attr("downloadSize", narInfo->fileSize);
if (showClosureSize)
@ -746,7 +746,7 @@ std::string ValidPathInfo::fingerprint(const Store & store) const
store.printStorePath(path));
return
"1;" + store.printStorePath(path) + ";"
+ narHash.to_string(Base32, true) + ";"
+ narHash->to_string(Base32, true) + ";"
+ std::to_string(narSize) + ";"
+ concatStringsSep(",", store.printStorePathSet(references));
}

3
src/libstore/store-api.hh
View file

@ -116,7 +116,8 @@ struct ValidPathInfo
{
StorePath path;
std::optional<StorePath> deriver;
Hash narHash;
// TODO document this
std::optional<Hash> narHash;
StorePathSet references;
time_t registrationTime = 0;
uint64_t narSize = 0; // 0 = unknown

68
src/libutil/hash.cc
View file

@ -16,16 +16,19 @@
namespace nix {
static size_t regularHashSize(HashType type) {
switch (type) {
case htMD5: return md5HashSize;
case htSHA1: return sha1HashSize;
case htSHA256: return sha256HashSize;
case htSHA512: return sha512HashSize;
}
abort();
}
void Hash::init()
{
if (!type) abort();
switch (*type) {
case htMD5: hashSize = md5HashSize; break;
case htSHA1: hashSize = sha1HashSize; break;
case htSHA256: hashSize = sha256HashSize; break;
case htSHA512: hashSize = sha512HashSize; break;
}
hashSize = regularHashSize(type);
assert(hashSize <= maxHashSize);
memset(hash, 0, maxHashSize);
}
@ -105,18 +108,11 @@ string printHash16or32(const Hash & hash)
}
HashType assertInitHashType(const Hash & h) {
if (h.type)
return *h.type;
else
abort();
}
std::string Hash::to_string(Base base, bool includeType) const
{
std::string s;
if (base == SRI || includeType) {
s += printHashType(assertInitHashType(*this));
s += printHashType(type);
s += base == SRI ? '-' : ':';
}
switch (base) {
@ -137,31 +133,39 @@ std::string Hash::to_string(Base base, bool includeType) const
Hash::Hash(std::string_view s, HashType type) : Hash(s, std::optional { type }) { }
Hash::Hash(std::string_view s) : Hash(s, std::optional<HashType>{}) { }
Hash::Hash(std::string_view s, std::optional<HashType> type)
: type(type)
Hash::Hash(std::string_view s, std::optional<HashType> optType)
{
size_t pos = 0;
bool isSRI = false;
// Find the : or - separater, and set `isSRI` to the correct value
auto sep = s.find(':');
if (sep == string::npos) {
if (sep == std::string_view::npos) {
sep = s.find('-');
if (sep != string::npos) {
if (sep != std::string_view::npos)
isSRI = true;
} else if (! type)
throw BadHash("hash '%s' does not include a type", s);
}
if (sep != string::npos) {
string hts = string(s, 0, sep);
this->type = parseHashType(hts);
if (!this->type)
// Parse the has type before the separater, if there was one.
std::optional<HashType> optParsedType;
if (sep != std::string_view::npos) {
auto hts = s.substr(0, sep);
auto optParsedType = parseHashTypeOpt(hts);
if (!optParsedType)
throw BadHash("unknown hash type '%s'", hts);
if (type && type != this->type)
throw BadHash("hash '%s' should have type '%s'", s, printHashType(*type));
pos = sep + 1;
}
// Either the string or user must provide the type, if they both do they
// must agree.
if (!optParsedType && !optType) {
throw BadHash("hash '%s' does not include a type, nor is the type otherwise known from context.", s);
} else {
this->type = optParsedType ? *optParsedType : *optType;
if (optParsedType && optType && *optParsedType != *optType)
throw BadHash("hash '%s' should have type '%s'", s, printHashType(*optType));
}
init();
size_t size = s.size() - pos;
@ -214,7 +218,7 @@ Hash::Hash(std::string_view s, std::optional<HashType> type)
}
else
throw BadHash("hash '%s' has wrong length for hash type '%s'", s, printHashType(*type));
throw BadHash("hash '%s' has wrong length for hash type '%s'", s, printHashType(type));
}
Hash newHashAllowEmpty(std::string hashStr, std::optional<HashType> ht)
@ -267,7 +271,7 @@ static void finish(HashType ht, Ctx & ctx, unsigned char * hash)
}
Hash hashString(HashType ht, const string & s)
Hash hashString(HashType ht, std::string_view s)
{
Ctx ctx;
Hash hash(ht);
@ -334,7 +338,7 @@ HashResult hashPath(
Hash compressHash(const Hash & hash, unsigned int newSize)
{
Hash h;
Hash h(hash.type);
h.hashSize = newSize;
for (unsigned int i = 0; i < hash.hashSize; ++i)
h.hash[i % newSize] ^= hash.hash[i];
@ -342,7 +346,7 @@ Hash compressHash(const Hash & hash, unsigned int newSize)
}
std::optional<HashType> parseHashTypeOpt(const string & s)
std::optional<HashType> parseHashTypeOpt(std::string_view s)
{
if (s == "md5") return htMD5;
else if (s == "sha1") return htSHA1;
@ -351,7 +355,7 @@ std::optional<HashType> parseHashTypeOpt(const string & s)
else return std::optional<HashType> {};
}
HashType parseHashType(const string & s)
HashType parseHashType(std::string_view s)
{
auto opt_h = parseHashTypeOpt(s);
if (opt_h)

17
src/libutil/hash.hh
View file

@ -25,14 +25,11 @@ enum Base : int { Base64, Base32, Base16, SRI };
struct Hash
{
static const unsigned int maxHashSize = 64;
unsigned int hashSize = 0;
unsigned char hash[maxHashSize] = {};
constexpr static size_t maxHashSize = 64;
size_t hashSize = 0;
uint8_t hash[maxHashSize] = {};
std::optional<HashType> type = {};
/* Create an unset hash object. */
Hash() { };
HashType type;
/* Create a zero-filled hash object. */
Hash(HashType type) : type(type) { init(); };
@ -105,7 +102,7 @@ Hash newHashAllowEmpty(std::string hashStr, std::optional<HashType> ht);
string printHash16or32(const Hash & hash);
/* Compute the hash of the given string. */
Hash hashString(HashType ht, const string & s);
Hash hashString(HashType ht, std::string_view s);
/* Compute the hash of the given file. */
Hash hashFile(HashType ht, const Path & path);
@ -121,9 +118,9 @@ HashResult hashPath(HashType ht, const Path & path,
Hash compressHash(const Hash & hash, unsigned int newSize);
/* Parse a string representing a hash type. */
HashType parseHashType(const string & s);
HashType parseHashType(std::string_view s);
/* Will return nothing on parse error */
std::optional<HashType> parseHashTypeOpt(const string & s);
std::optional<HashType> parseHashTypeOpt(std::string_view s);
/* And the reverse. */
string printHashType(HashType ht);

2
src/nix-prefetch-url/nix-prefetch-url.cc
View file

@ -153,7 +153,7 @@ static int _main(int argc, char * * argv)
/* If an expected hash is given, the file may already exist in
the store. */
Hash hash, expectedHash(ht);
Hash hash(ht), expectedHash(ht);
std::optional<StorePath> storePath;
if (args.size() == 2) {
expectedHash = Hash(args[1], ht);

10
src/nix-store/nix-store.cc
View file

@ -372,8 +372,8 @@ static void opQuery(Strings opFlags, Strings opArgs)
for (auto & j : maybeUseOutputs(store->followLinksToStorePath(i), useOutput, forceRealise)) {
auto info = store->queryPathInfo(j);
if (query == qHash) {
assert(info->narHash.type == htSHA256);
cout << fmt("%s\n", info->narHash.to_string(Base32, true));
assert(info->narHash && info->narHash->type == htSHA256);
cout << fmt("%s\n", info->narHash->to_string(Base32, true));
} else if (query == qSize)
cout << fmt("%d\n", info->narSize);
}
@ -725,7 +725,7 @@ static void opVerifyPath(Strings opFlags, Strings opArgs)
auto path = store->followLinksToStorePath(i);
printMsg(lvlTalkative, "checking path '%s'...", store->printStorePath(path));
auto info = store->queryPathInfo(path);
HashSink sink(*info->narHash.type);
HashSink sink(info->narHash->type);
store->narFromPath(path, sink);
auto current = sink.finish();
if (current.first != info->narHash) {
@ -734,7 +734,7 @@ static void opVerifyPath(Strings opFlags, Strings opArgs)
.hint = hintfmt(
"path '%s' was modified! expected hash '%s', got '%s'",
store->printStorePath(path),
info->narHash.to_string(Base32, true),
info->narHash->to_string(Base32, true),
current.first.to_string(Base32, true))
});
status = 1;
@ -864,7 +864,7 @@ static void opServe(Strings opFlags, Strings opArgs)
out << info->narSize // downloadSize
<< info->narSize;
if (GET_PROTOCOL_MINOR(clientVersion) >= 4)
out << (info->narHash ? info->narHash.to_string(Base32, true) : "") << info->ca << info->sigs;
out << (info->narHash ? info->narHash->to_string(Base32, true) : "") << info->ca << info->sigs;
} catch (InvalidPath &) {
}
}

4
src/nix/add-to-store.cc
View file

@ -46,9 +46,9 @@ struct CmdAddToStore : MixDryRun, StoreCommand
auto narHash = hashString(htSHA256, *sink.s);
ValidPathInfo info(store->makeFixedOutputPath(FileIngestionMethod::Recursive, narHash, *namePart));
info.narHash = narHash;
*info.narHash = narHash;
info.narSize = sink.s->size();
info.ca = makeFixedOutputCA(FileIngestionMethod::Recursive, info.narHash);
info.ca = makeFixedOutputCA(FileIngestionMethod::Recursive, *info.narHash);
if (!dryRun) {
auto source = StringSource { *sink.s };

2
src/nix/develop.cc
View file

@ -139,7 +139,7 @@ StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
.path = shellOutPath,
.hash = DerivationOutputHash {
.method = FileIngestionMethod::Flat,
.hash = Hash { },
.hash = Hash { htSHA256 },
},
});
drv.env["out"] = store->printStorePath(shellOutPath);

2
src/nix/make-content-addressable.cc
View file

@ -82,7 +82,7 @@ struct CmdMakeContentAddressable : StorePathsCommand, MixJSON
if (hasSelfReference) info.references.insert(info.path);
info.narHash = narHash;
info.narSize = sink.s->size();
info.ca = makeFixedOutputCA(FileIngestionMethod::Recursive, info.narHash);
info.ca = makeFixedOutputCA(FileIngestionMethod::Recursive, *info.narHash);
if (!json)
printInfo("rewrote '%s' to '%s'", pathS, store->printStorePath(info.path));

8
src/nix/verify.cc
View file

@ -88,15 +88,15 @@ struct CmdVerify : StorePathsCommand
std::unique_ptr<AbstractHashSink> hashSink;
if (info->ca == "")
hashSink = std::make_unique<HashSink>(*info->narHash.type);
hashSink = std::make_unique<HashSink>(info->narHash->type);
else
hashSink = std::make_unique<HashModuloSink>(*info->narHash.type, std::string(info->path.hashPart()));
hashSink = std::make_unique<HashModuloSink>(info->narHash->type, std::string(info->path.hashPart()));
store->narFromPath(info->path, *hashSink);
auto hash = hashSink->finish();
if (hash.first != info->narHash) {
if (hash.first != *info->narHash) {
corrupted++;
act2.result(resCorruptedPath, store->printStorePath(info->path));
logError({
@ -104,7 +104,7 @@ struct CmdVerify : StorePathsCommand
.hint = hintfmt(
"path '%s' was modified! expected hash '%s', got '%s'",
store->printStorePath(info->path),
info->narHash.to_string(Base32, true),
info->narHash->to_string(Base32, true),
hash.first.to_string(Base32, true))
});
}