lftp/lftp-4.8.4-ssh-prompt.patch

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From 0ad0732b8fbacd3519b4e3ecf8c394681b314672 Mon Sep 17 00:00:00 2001
From: "Alexander V. Lukyanov" <lavv17f@gmail.com>
Date: Thu, 5 Dec 2019 21:34:11 +0300
Subject: [PATCH] SSH_Access: fixed yes/no/[fingerprint] recognition (fix #547,
fix #525)
---
src/SSH_Access.cc | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/SSH_Access.cc b/src/SSH_Access.cc
index 97683a3f..adf0c196 100644
--- a/src/SSH_Access.cc
+++ b/src/SSH_Access.cc
@@ -20,6 +20,8 @@
#include <config.h>
#include "SSH_Access.h"
#include "misc.h"
+#include <algorithm>
+#include "ascii_ctype.h"
void SSH_Access::MakePtyBuffers()
{
@@ -70,6 +70,26 @@ static bool IsPasswordPrompt(const char *b,const char *e)
return (e-b>=len && !strncasecmp(b,suffix,len));
}
+struct nocase_eq
+{
+ inline bool operator() (char lhs, char rhs) const
+ {
+ return c_tolower(lhs) == c_tolower(rhs);
+ };
+};
+
+static bool contains(char const *begin, char const *end, char const *needle)
+{
+ return std::search(begin, end, needle, needle+strlen(needle), nocase_eq()) != end;
+}
+
+static bool IsConfirmPrompt(const char *b,const char *e)
+{
+ if(b==e)
+ return false;
+ return e[-1]=='?' && contains(b,e,"yes/no");
+}
+
int SSH_Access::HandleSSHMessage()
{
int m=STALL;
@@ -99,7 +106,7 @@ int SSH_Access::HandleSSHMessage()
password_sent++;
return m;
}
- if(ends_with(b,b+s,"(yes/no)?"))
+ if(IsConfirmPrompt(b,b+s))
{
const char *answer=QueryBool("auto-confirm",hostname)?"yes\n":"no\n";
pty_recv_buf->Put(answer);