1 files changed, 18 insertions, 4 deletions
diff --git a/src/lib/prov/openssl/openssl_rsa.cpp b/src/lib/prov/openssl/openssl_rsa.cpp
index 8c25d00ef..f8b2b82d6 100644
--- a/src/lib/prov/openssl/openssl_rsa.cpp
+++ b/src/lib/prov/openssl/openssl_rsa.cpp
@@ -152,7 +152,14 @@ class OpenSSL_RSA_Verification_Operation : public PK_Ops::Verification_with_EMSA
             throw OpenSSL_Error("d2i_RSAPublicKey");
          }
 
-      size_t max_input_bits() const override { return ::BN_num_bits(m_openssl_rsa->n) - 1; }
+      size_t max_input_bits() const override
+         {
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+         return ::BN_num_bits(m_openssl_rsa->n) - 1;
+#else
+         return ::RSA_bits(m_openssl_rsa.get()) - 1;
+#endif
+         }
 
       bool with_recovery() const override { return true; }
 
@@ -215,7 +222,14 @@ class OpenSSL_RSA_Signing_Operation : public PK_Ops::Signature_with_EMSA
          return outbuf;
          }
 
-      size_t max_input_bits() const override { return ::BN_num_bits(m_openssl_rsa->n) - 1; }
+      size_t max_input_bits() const override
+         {
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+         return ::BN_num_bits(m_openssl_rsa->n) - 1;
+#else
+         return ::RSA_bits(m_openssl_rsa.get()) - 1;
+#endif
+         }
 
    private:
       std::unique_ptr<RSA, std::function<void (RSA*)>> m_openssl_rsa;
@@ -269,10 +283,10 @@ make_openssl_rsa_private_key(RandomNumberGenerator& rng, size_t rsa_bits)
    std::unique_ptr<RSA, std::function<void (RSA*)>> rsa(RSA_new(), RSA_free);
    if(!rsa)
       throw OpenSSL_Error("RSA_new");
-   if(!RSA_generate_key_ex(rsa.get(), rsa_bits, bn.get(), NULL))
+   if(!RSA_generate_key_ex(rsa.get(), rsa_bits, bn.get(), nullptr))
       throw OpenSSL_Error("RSA_generate_key_ex");
 
-   uint8_t* der = NULL;
+   uint8_t* der = nullptr;
    int bytes = i2d_RSAPrivateKey(rsa.get(), &der);
    if(bytes < 0)
       throw OpenSSL_Error("i2d_RSAPrivateKey");