Author: Adam Majer <adamm@zombino.com>
Summary: Add OpenSSL 1.1 support.
PR: https://github.com/isc-projects/kea/pull/34

--- a/src/lib/cryptolink/openssl_hash.cc
+++ b/src/lib/cryptolink/openssl_hash.cc
@@ -5,11 +5,11 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <cryptolink.h>
 #include <cryptolink/crypto_hash.h>
 
-#include <boost/scoped_ptr.hpp>
+#include <boost/move/unique_ptr.hpp>
 
 #include <openssl/evp.h>
 
 #include <cryptolink/openssl_common.h>
 
@@ -60,24 +60,17 @@ public:
             isc_throw(isc::cryptolink::UnsupportedAlgorithm,
                       "Unknown hash algorithm: " <<
                       static_cast<int>(hash_algorithm));
         }
 
-        md_.reset(new EVP_MD_CTX);
+        md_.reset(EVP_MD_CTX_new());
 
         EVP_MD_CTX_init(md_.get());
 
         EVP_DigestInit_ex(md_.get(), algo, NULL);
     }
 
-    /// @brief Destructor
-    ~HashImpl() {
-        if (md_) {
-            EVP_MD_CTX_cleanup(md_.get());
-        }
-    }
-
     /// @brief Returns the output size of the digest
     ///
     /// @return output size of the digest
     size_t getOutputLength() const {
         return (EVP_MD_CTX_size(md_.get()));
@@ -128,12 +121,25 @@ public:
         }
         return (std::vector<uint8_t>(digest.begin(), digest.end()));
     }
 
 private:
+    class EvpDeleter {
+    public:
+        void operator()(EVP_MD_CTX *ptr) {EVP_MD_CTX_free(ptr);}
+    };
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+    static EVP_MD_CTX* EVP_MD_CTX_new() { return new EVP_MD_CTX; }
+    static void EVP_MD_CTX_free(EVP_MD_CTX *ptr) {
+        EVP_MD_CTX_cleanup(ptr);
+        delete ptr;
+    }
+#endif
+
     /// @brief The protected pointer to the OpenSSL EVP_MD_CTX structure
-    boost::scoped_ptr<EVP_MD_CTX> md_;
+    boost::movelib::unique_ptr<EVP_MD_CTX, EvpDeleter> md_;
 };
 
 Hash::Hash(const HashAlgorithm hash_algorithm)
 {
     impl_ = new HashImpl(hash_algorithm);
--- a/src/lib/cryptolink/openssl_hmac.cc
+++ b/src/lib/cryptolink/openssl_hmac.cc
@@ -5,11 +5,11 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <cryptolink.h>
 #include <cryptolink/crypto_hmac.h>
 
-#include <boost/scoped_ptr.hpp>
+#include <boost/move/unique_ptr.hpp>
 
 #include <openssl/hmac.h>
 
 #include <cryptolink/openssl_common.h>
 
@@ -39,25 +39,16 @@ public:
         }
         if (secret_len == 0) {
             isc_throw(BadKey, "Bad HMAC secret length: 0");
         }
 
-        md_.reset(new HMAC_CTX);
-        HMAC_CTX_init(md_.get());
-
+        md_.reset(HMAC_CTX_new());
         HMAC_Init_ex(md_.get(), secret,
                      static_cast<int>(secret_len),
                      algo, NULL);
     }
 
-    /// @brief Destructor
-    ~HMACImpl() {
-        if (md_) {
-            HMAC_CTX_cleanup(md_.get());
-        }
-    }
-
     /// @brief Returns the output size of the digest
     ///
     /// @return output size of the digest
     size_t getOutputLength() const {
         int size = HMAC_size(md_.get());
@@ -128,13 +119,29 @@ public:
         }
         return (digest.same(sig, len));
     }
 
 private:
+    class HMAC_Deleter {
+    public:
+        void operator()(HMAC_CTX *ptr) { HMAC_CTX_free(ptr); }
+    };
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+    static HMAC_CTX* HMAC_CTX_new() {
+        HMAC_CTX *ptr = new HMAC_CTX;
+        HMAC_CTX_init(ptr);
+        return ptr;
+    }
+    static void HMAC_CTX_free(HMAC_CTX *ptr) {
+        HMAC_CTX_cleanup(ptr);
+        delete ptr;
+    }
+#endif
 
     /// @brief The protected pointer to the OpenSSL HMAC_CTX structure
-    boost::scoped_ptr<HMAC_CTX> md_;
+    boost::movelib::unique_ptr<HMAC_CTX, HMAC_Deleter> md_;
 };
 
 HMAC::HMAC(const void* secret, size_t secret_length,
            const HashAlgorithm hash_algorithm)
 {