limit the number of responses from keyboard interactive prompt

This makes it safer to accidentally return more than the requested
number of responses from the prompt callback.

Refs: https://github.com/alexcrichton/ssh2-rs/issues/65

1 files changed, 1 insertions, 0 deletions

diff --git a/src/session.rs b/src/session.rs
index 30be94d..ab27a4f 100644
--- a/src/session.rs
+++ b/src/session.rs
@@ -347,6 +347,7 @@ impl Session {
             for (i, response) in (*prompter)
                 .prompt(&username, &instruction, &prompts)
                 .into_iter()
+                .take(prompts.len())
                 .enumerate()
             {
                 let ptr = strdup_string(&response);