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fix some stream reading. all tests passing (very very slowly) so now it's time for optimization

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This commit is contained in:
Thomas Fussell 2017-04-30 21:16:05 -04:00
parent ee642fc6c1
commit c677a14969
1 changed files with 7 additions and 10 deletions
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17
source/detail/cryptography/xlsx_crypto_consumer.cpp
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@ -51,15 +51,12 @@ std::vector<std::uint8_t> decrypt_xlsx_standard(
{
const auto key = info.calculate_key();
auto decrypted_size = read<std::uint64_t>(encrypted_package_stream);
auto encrypted_package = std::vector<byte>(
std::istreambuf_iterator<char>(encrypted_package_stream),
std::istreambuf_iterator<char>());
auto decrypted_size = read<std::uint64_t>(encrypted_package_stream);
auto decrypted = xlnt::detail::aes_ecb_decrypt(
encrypted_package,
key,
encrypted_package_stream.tellg());
auto decrypted = xlnt::detail::aes_ecb_decrypt(encrypted_package, key);
decrypted.resize(static_cast<std::size_t>(decrypted_size));
@ -145,14 +142,14 @@ encryption_info::standard_encryption_info read_standard_encryption_info(std::ist
throw xlnt::exception("invalid header");
}
const auto csp_name_length = (header_length - (info_stream.tellg() - index_at_start) - 1) / 2;
auto csp_name = xlnt::detail::utf16_to_utf8(xlnt::detail::read_string<char16_t>(info_stream, csp_name_length));
if (csp_name != "Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
&& csp_name != "Microsoft Enhanced RSA and AES Cryptographic Provider")
const auto csp_name_length = (header_length - (info_stream.tellg() - index_at_start)) / 2;
auto csp_name = xlnt::detail::read_string<char16_t>(info_stream, csp_name_length);
csp_name.pop_back(); // remove extraneous trailing null
if (csp_name != u"Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
&& csp_name != u"Microsoft Enhanced RSA and AES Cryptographic Provider")
{
throw xlnt::exception("invalid cryptographic provider");
}
//info_stream.seekg((csp_name_length + 1) * 2);
const auto salt_size = read<std::uint32_t>(info_stream);
result.salt = xlnt::detail::read_vector<byte>(info_stream, salt_size);