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Move the HMAC function to the encryption header.

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This will be useful for doing challenge authentication on InspIRCd.
This commit is contained in:
Sadie Powell
2024-03-09 22:51:23 +00:00
parent 1b86665d81
commit defb8348a7
2 changed files with 23 additions and 20 deletions
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include/modules/encryption.h
+21
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@@ -73,6 +73,27 @@ namespace Encryption
context->Update(std::forward<Args>(args)...);
return context->Finalize();
}
inline Anope::string HMAC(const Anope::string &key, const Anope::string &data)
{
if (!block_size)
return {};
auto keybuf = key.length() > block_size ? Encrypt(key) : key;
keybuf.resize(block_size);
Anope::string hmac1;
Anope::string hmac2;
for (size_t i = 0; i < block_size; ++i)
{
hmac1.push_back(static_cast<char>(keybuf[i] ^ 0x5C));
hmac2.push_back(static_cast<char>(keybuf[i] ^ 0x36));
}
hmac2.append(data);
hmac1.append(Encrypt(hmac2));
return Encrypt(hmac1);
}
};
/** Helper template for creating simple providers of encryption contexts. */