CONTRIB-2513 Update contrib/libs/curl to 7.79.1

ref:cfccba5015904b0f0cadfc018200e2a1b4d50ae6

1 files changed, 18 insertions, 20 deletions

diff --git a/contrib/libs/curl/lib/pop3.c b/contrib/libs/curl/lib/pop3.c
index 5fdd6f3e05..d3f3de6d49 100644
--- a/contrib/libs/curl/lib/pop3.c
+++ b/contrib/libs/curl/lib/pop3.c
@@ -75,7 +75,6 @@
 #include "strcase.h"
 #include "vtls/vtls.h"
 #include "connect.h"
-#include "strerror.h"
 #include "select.h"
 #include "multiif.h"
 #include "url.h"
@@ -741,28 +740,23 @@ static CURLcode pop3_state_capa_resp(struct Curl_easy *data, int pop3code,
       }
     }
   }
-  else if(pop3code == '+') {
-    if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
-      /* We don't have a SSL/TLS connection yet, but SSL is requested */
-      if(pop3c->tls_supported)
-        /* Switch to TLS connection now */
-        result = pop3_perform_starttls(data, conn);
-      else if(data->set.use_ssl == CURLUSESSL_TRY)
-        /* Fallback and carry on with authentication */
-        result = pop3_perform_authentication(data, conn);
-      else {
-        failf(data, "STLS not supported.");
-        result = CURLE_USE_SSL_FAILED;
-      }
-    }
-    else
-      result = pop3_perform_authentication(data, conn);
-  }
   else {
     /* Clear text is supported when CAPA isn't recognised */
-    pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
+    if(pop3code != '+')
+      pop3c->authtypes |= POP3_TYPE_CLEARTEXT;
 
-    result = pop3_perform_authentication(data, conn);
+    if(!data->set.use_ssl || conn->ssl[FIRSTSOCKET].use)
+      result = pop3_perform_authentication(data, conn);
+    else if(pop3code == '+' && pop3c->tls_supported)
+      /* Switch to TLS connection now */
+      result = pop3_perform_starttls(data, conn);
+    else if(data->set.use_ssl <= CURLUSESSL_TRY)
+      /* Fallback and carry on with authentication */
+      result = pop3_perform_authentication(data, conn);
+    else {
+      failf(data, "STLS not supported.");
+      result = CURLE_USE_SSL_FAILED;
+    }
   }
 
   return result;
@@ -777,6 +771,10 @@ static CURLcode pop3_state_starttls_resp(struct Curl_easy *data,
   CURLcode result = CURLE_OK;
   (void)instate; /* no use for this yet */
 
+  /* Pipelining in response is forbidden. */
+  if(data->conn->proto.pop3c.pp.cache_size)
+    return CURLE_WEIRD_SERVER_REPLY;
+
   if(pop3code != '+') {
     if(data->set.use_ssl != CURLUSESSL_TRY) {
       failf(data, "STARTTLS denied");