Core/Crypto: Transitional Cryptography update for OpenSSL 1.1 (#21533)

Support for both OpenSSL 1.0 LTS and OpenSSL 1.1 versions.

Many Linux distributions are still on 1.0 and will stay on LTS for quite
some time.

Port of CMaNGOS commit: https://github.com/cmangos/mangos-wotlk/commit/e1b0048f052eda46bb27d20224d0339960816ac2

1 files changed, 24 insertions, 9 deletions

diff --git a/src/common/Cryptography/HMACSHA1.cpp b/src/common/Cryptography/HMACSHA1.cpp
index ce8df47b605..c5e6e448fe3 100644
--- a/src/common/Cryptography/HMACSHA1.cpp
+++ b/src/common/Cryptography/HMACSHA1.cpp
@@ -21,38 +21,53 @@
 #include "Errors.h"
 #include <cstring>
 
+#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x10100000L
+HMAC_CTX* HMAC_CTX_new()
+{
+    HMAC_CTX *ctx = new HMAC_CTX();
+    HMAC_CTX_init(ctx);
+    return ctx;
+}
+
+void HMAC_CTX_free(HMAC_CTX* ctx)
+{
+    HMAC_CTX_cleanup(ctx);
+    delete ctx;
+}
+#endif
+
 HmacHash::HmacHash(uint32 len, uint8* seed)
 {
-    HMAC_CTX_init(&m_ctx);
-    HMAC_Init_ex(&m_ctx, seed, len, EVP_sha1(), nullptr);
+    m_ctx = HMAC_CTX_new();
+    HMAC_Init_ex(m_ctx, seed, len, EVP_sha1(), nullptr);
     memset(m_digest, 0, sizeof(m_digest));
 }
 
 HmacHash::~HmacHash()
 {
-    HMAC_CTX_cleanup(&m_ctx);
+    HMAC_CTX_free(m_ctx);
 }
 
 void HmacHash::UpdateData(std::string const& str)
 {
-    HMAC_Update(&m_ctx, (uint8 const*)str.c_str(), str.length());
+    HMAC_Update(m_ctx, reinterpret_cast<uint8 const*>(str.c_str()), str.length());
 }
 
 void HmacHash::UpdateData(uint8 const* data, size_t len)
 {
-    HMAC_Update(&m_ctx, data, len);
+    HMAC_Update(m_ctx, data, len);
 }
 
 void HmacHash::Finalize()
 {
     uint32 length = 0;
-    HMAC_Final(&m_ctx, (uint8*)m_digest, &length);
+    HMAC_Final(m_ctx, m_digest, &length);
     ASSERT(length == SHA_DIGEST_LENGTH);
 }
 
-uint8 *HmacHash::ComputeHash(BigNumber* bn)
+uint8* HmacHash::ComputeHash(BigNumber* bn)
 {
-    HMAC_Update(&m_ctx, bn->AsByteArray().get(), bn->GetNumBytes());
+    HMAC_Update(m_ctx, bn->AsByteArray().get(), bn->GetNumBytes());
     Finalize();
-    return (uint8*)m_digest;
+    return m_digest;
 }