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daemon: Raise an error if substituter doesn't send the expected hash.

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It was already impossible in practice for 'expectedHashStr' to be empty
if 'status' == "success".

* nix/libstore/build.cc (SubstitutionGoal::finished): Throw 'SubstError'
when 'expectedHashStr' is empty.
This commit is contained in:
Ludovic Courtès 2020-12-03 09:44:22 +01:00
parent 5ff521452b
commit bfe4cdf88e
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GPG key ID: 090B11993D9AEBB5
1 changed files with 19 additions and 18 deletions
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37
nix/libstore/build.cc
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@ -3040,27 +3040,28 @@ void SubstitutionGoal::finished()
if (!pathExists(destPath))
throw SubstError(format("substitute did not produce path `%1%'") % destPath);
if (expectedHashStr == "")
throw SubstError(format("substituter did not communicate hash for `%1'") % storePath);
hash = hashPath(htSHA256, destPath);
/* Verify the expected hash we got from the substituer. */
if (expectedHashStr != "") {
size_t n = expectedHashStr.find(':');
if (n == string::npos)
throw Error(format("bad hash from substituter: %1%") % expectedHashStr);
HashType hashType = parseHashType(string(expectedHashStr, 0, n));
if (hashType == htUnknown)
throw Error(format("unknown hash algorithm in `%1%'") % expectedHashStr);
Hash expectedHash = parseHash16or32(hashType, string(expectedHashStr, n + 1));
Hash actualHash = hashType == htSHA256 ? hash.first : hashPath(hashType, destPath).first;
if (expectedHash != actualHash) {
if (settings.printBuildTrace)
printMsg(lvlError, format("@ hash-mismatch %1% %2% %3% %4%")
% storePath % "sha256"
% printHash16or32(expectedHash)
% printHash16or32(actualHash));
throw SubstError(format("hash mismatch for substituted item `%1%'") % storePath);
}
}
size_t n = expectedHashStr.find(':');
if (n == string::npos)
throw Error(format("bad hash from substituter: %1%") % expectedHashStr);
HashType hashType = parseHashType(string(expectedHashStr, 0, n));
if (hashType == htUnknown)
throw Error(format("unknown hash algorithm in `%1%'") % expectedHashStr);
Hash expectedHash = parseHash16or32(hashType, string(expectedHashStr, n + 1));
Hash actualHash = hashType == htSHA256 ? hash.first : hashPath(hashType, destPath).first;
if (expectedHash != actualHash) {
if (settings.printBuildTrace)
printMsg(lvlError, format("@ hash-mismatch %1% %2% %3% %4%")
% storePath % "sha256"
% printHash16or32(expectedHash)
% printHash16or32(actualHash));
throw SubstError(format("hash mismatch for substituted item `%1%'") % storePath);
}
} catch (SubstError & e) {