diff --git a/verifier.h b/verifier.h
index b7924c7..9448232 100644
--- a/verifier.h
+++ b/verifier.h
@@ -72,6 +72,12 @@
 
 bool load_keys(const char* filename, std::vector<Certificate>& certs);
 
+// Checks that the RSA key has a modulus of 2048 bits long, and public exponent is 3 or 65537.
+bool CheckRSAKey(const std::unique_ptr<RSA, RSADeleter>& rsa);
+
+// Checks that the field size of the curve for the EC key is 256 bits.
+bool CheckECKey(const std::unique_ptr<EC_KEY, ECKEYDeleter>& ec_key);
+
 // Parses a PEM-encoded x509 certificate from the given buffer and saves it into |cert|. Returns
 // false if there is a parsing failure or the signature's encryption algorithm is not supported.
 bool LoadCertificateFromBuffer(const std::vector<uint8_t>& pem_content, Certificate* cert);