From bc87f7b337154e683369a3790ee8fd1a7d4cba98 Mon Sep 17 00:00:00 2001
From: Shauren <shauren.trinity@gmail.com>
Date: Tue, 3 May 2022 17:03:57 +0200
Subject: Core/Crypto: Switch away from most deprecated openssl functions and
 removed upper version limit

---
 src/common/Cryptography/CryptoHash.h | 38 ++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

(limited to 'src/common/Cryptography/CryptoHash.h')

diff --git a/src/common/Cryptography/CryptoHash.h b/src/common/Cryptography/CryptoHash.h
index 8e6f2b32394..d36d345b88c 100644
--- a/src/common/Cryptography/CryptoHash.h
+++ b/src/common/Cryptography/CryptoHash.h
@@ -35,10 +35,10 @@ namespace Trinity::Impl
         typedef EVP_MD const* (*HashCreator)();
 
 #if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x10100000L
-        static EVP_MD_CTX* MakeCTX() { return EVP_MD_CTX_create(); }
+        static EVP_MD_CTX* MakeCTX() noexcept { return EVP_MD_CTX_create(); }
         static void DestroyCTX(EVP_MD_CTX* ctx) { EVP_MD_CTX_destroy(ctx); }
 #else
-        static EVP_MD_CTX* MakeCTX() { return EVP_MD_CTX_new(); }
+        static EVP_MD_CTX* MakeCTX() noexcept { return EVP_MD_CTX_new(); }
         static void DestroyCTX(EVP_MD_CTX* ctx) { EVP_MD_CTX_free(ctx); }
 #endif
     };
@@ -73,6 +73,16 @@ namespace Trinity::Impl
                 ASSERT(result == 1);
             }
 
+            GenericHash(GenericHash const& right) : _ctx(GenericHashImpl::MakeCTX())
+            {
+                *this = right;
+            }
+
+            GenericHash(GenericHash&& right) noexcept
+            {
+                *this = std::move(right);
+            }
+
             ~GenericHash()
             {
                 if (!_ctx)
@@ -81,6 +91,27 @@ namespace Trinity::Impl
                 _ctx = nullptr;
             }
 
+            GenericHash& operator=(GenericHash const& right)
+            {
+                if (this == &right)
+                    return *this;
+
+                int result = EVP_MD_CTX_copy(_ctx, right._ctx);
+                ASSERT(result == 1);
+                _digest = right._digest;
+                return *this;
+            }
+
+            GenericHash& operator=(GenericHash&& right) noexcept
+            {
+                if (this == &right)
+                    return *this;
+
+                _ctx = std::exchange(right._ctx, GenericHashImpl::MakeCTX());
+                _digest = std::exchange(right._digest, Digest{});
+                return *this;
+            }
+
             void UpdateData(uint8 const* data, size_t len)
             {
                 int result = EVP_DigestUpdate(_ctx, data, len);
@@ -98,8 +129,6 @@ namespace Trinity::Impl
                 int result = EVP_DigestFinal_ex(_ctx, _digest.data(), &length);
                 ASSERT(result == 1);
                 ASSERT(length == DIGEST_LENGTH);
-                GenericHashImpl::DestroyCTX(_ctx);
-                _ctx = nullptr;
             }
 
             Digest const& GetDigest() const { return _digest; }
@@ -112,6 +141,7 @@ namespace Trinity::Impl
 
 namespace Trinity::Crypto
 {
+    using MD5 = Trinity::Impl::GenericHash<EVP_md5, Constants::MD5_DIGEST_LENGTH_BYTES>;
     using SHA1 = Trinity::Impl::GenericHash<EVP_sha1, Constants::SHA1_DIGEST_LENGTH_BYTES>;
     using SHA256 = Trinity::Impl::GenericHash<EVP_sha256, Constants::SHA256_DIGEST_LENGTH_BYTES>;
 }
-- 
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