sectransp: fix EOF handling

Regression since the large refactor from 2022

Closes #11427

diff --git a/lib/vtls/sectransp.c b/lib/vtls/sectransp.c
index ff5770fb8d59f27207ea830b95eb782b4d22e806..32bb3a5a79ec41c01cee75def85791ebc2903573 100644 (file)
--- a/lib/vtls/sectransp.c
+++ b/lib/vtls/sectransp.c
@@ -860,6 +860,9 @@ static OSStatus bio_cf_in_read(SSLConnectionRef connection,
     }
     nread = 0;
   }
+  else if(nread == 0) {
+    rtn = errSSLClosedGraceful;
+  }
   else if((size_t)nread < *dataLength) {
     rtn = errSSLWouldBlock;
   }