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Merge pull request #4425 from wwylele/fix-seed

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filesys/ncch: prevent buffer overflow on calculating SHA256
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Ben 2018-11-11 17:51:27 +01:00 committed by GitHub
commit 7ac444447a
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1 changed files with 3 additions and 1 deletions
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src/core/file_sys/ncch_container.cpp
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@ -179,7 +179,9 @@ Loader::ResultStatus NCCHContainer::Load() {
std::memcpy(input.data(), key_y_primary.data(), key_y_primary.size()); std::memcpy(input.data(), key_y_primary.data(), key_y_primary.size());
std::memcpy(input.data() + key_y_primary.size(), seed.data(), seed.size()); std::memcpy(input.data() + key_y_primary.size(), seed.data(), seed.size());
CryptoPP::SHA256 sha; CryptoPP::SHA256 sha;
sha.CalculateDigest(key_y_secondary.data(), input.data(), input.size()); std::array<u8, CryptoPP::SHA256::DIGESTSIZE> hash;
sha.CalculateDigest(hash.data(), input.data(), input.size());
std::memcpy(key_y_secondary.data(), hash.data(), key_y_secondary.size());
} }
} }