Add self-tests to the encryption providers.

1 files changed, 18 insertions, 1 deletions

diff --git a/include/modules/encryption.h b/include/modules/encryption.h
index b8ec8ff58..c475f4fbd 100644
--- a/include/modules/encryption.h
+++ b/include/modules/encryption.h
@@ -66,7 +66,18 @@ namespace Encryption
 		/** Checks whether a plain text value matches a hash created by this provider. */
 		virtual bool Compare(const Anope::string &hash, const Anope::string &plain)
 		{
-			return hash.equals_cs(plain);
+			return !hash.empty() && hash.equals_cs(ToPrintable(Encrypt(plain)));
+		}
+
+		/** Called on initialising a encryption provider to check it works properly. */
+		void Check(const Anope::map<Anope::string> &checks)
+		{
+			for (const auto &[hash, plain] : checks)
+			{
+				if (!Compare(hash, plain))
+					throw ModuleException("BUG: unable to generate " + this->name + " hashes safely! Please report this!");
+			}
+			Log(LOG_DEBUG) << "The " << this->name << " encryption provider appears to be working correctly.";
 		}
 
 		/** Creates a new encryption context. */
@@ -102,6 +113,12 @@ namespace Encryption
 
 			return Encrypt(hmac1);
 		}
+
+		/** Converts a hash to its printable form. */
+		virtual Anope::string ToPrintable(const Anope::string &hash)
+		{
+			return Anope::Hex(hash);
+		}
 	};
 
 	/** Helper template for creating simple providers of encryption contexts. */