Fix setting encrypted block size when cipher is unknown

1 files changed, 4 insertions, 5 deletions

diff --git a/src/components/security_manager/src/ssl_context_impl.cc b/src/components/security_manager/src/ssl_context_impl.cc
index 3e1b7db0bb..de5d918685 100644
--- a/src/components/security_manager/src/ssl_context_impl.cc
+++ b/src/components/security_manager/src/ssl_context_impl.cc
@@ -522,16 +522,15 @@ bool CryptoManagerImpl::SSLContextImpl::Decrypt(const uint8_t* const in_data,
 
 size_t CryptoManagerImpl::SSLContextImpl::get_max_block_size(size_t mtu) const {
   SDL_LOG_AUTO_TRACE();
+  const auto max_allowed_block_size =
+      mtu > SSL3_RT_MAX_PLAIN_LENGTH ? SSL3_RT_MAX_PLAIN_LENGTH : mtu;
   if (!max_block_size_) {
     // FIXME(EZamakhov): add correct logics for TLS1/1.2/SSL3
     // For SSL3.0 set temporary value 90, old TLS1.2 value is 29
-    assert(mtu > 90);
-    return mtu - 90;
+    assert(max_allowed_block_size > 90);
+    return max_allowed_block_size - 90;
   }
 
-  const auto max_allowed_block_size =
-      mtu > SSL3_RT_MAX_PLAIN_LENGTH ? SSL3_RT_MAX_PLAIN_LENGTH : mtu;
-
   return max_block_size_(max_allowed_block_size);
 }