diff --git a/Signature.h b/Signature.h
index 90eb06d9..dd45f0be 100644
--- a/Signature.h
+++ b/Signature.h
@@ -244,6 +244,10 @@ namespace crypto
 				m_PublicKey.Initialize (CryptoPP::Integer (signingKey, keyLen), CryptoPP::Integer (rsae));
 			}
 
+			RSAVerifier (const CryptoPP::RSA::PublicKey& publicKey): m_PublicKey (publicKey)
+			{
+			}
+
 			bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const 
 			{
 				typename CryptoPP::RSASS<CryptoPP::PKCS1v15, Hash>::Verifier verifier (m_PublicKey);
@@ -302,6 +306,10 @@ namespace crypto
 			RSASHA2562048Verifier (const uint8_t * signingKey): RSAVerifier (signingKey) 
 			{
 			}
+
+			RSASHA2562048Verifier (const CryptoPP::RSA::PublicKey& publicKey): RSAVerifier (publicKey)
+			{
+			}
 	};
 
 	class RSASHA2562048Signer: public RSASigner<CryptoPP::SHA256> 
@@ -323,6 +331,10 @@ namespace crypto
 			RSASHA3843072Verifier (const uint8_t * signingKey): RSAVerifier (signingKey) 
 			{
 			}
+
+			RSASHA3843072Verifier (const CryptoPP::RSA::PublicKey& publicKey): RSAVerifier (publicKey)
+			{
+			}
 	};
 
 	class RSASHA3843072Signer: public RSASigner<CryptoPP::SHA384> 
@@ -344,6 +356,10 @@ namespace crypto
 			RSASHA5124096Verifier (const uint8_t * signingKey): RSAVerifier (signingKey) 
 			{
 			}
+
+			RSASHA5124096Verifier (const CryptoPP::RSA::PublicKey& publicKey): RSAVerifier (publicKey)
+			{
+			}
 	};
 
 	class RSASHA5124096Signer: public RSASigner<CryptoPP::SHA512>