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Revamp SSH authentication code so that user interaction is more

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abstracted out; replace loops structured around a single interaction
per loop with less tortuous code (fixes: `ki-multiprompt-crash',
`ssh1-bad-passphrase-crash'; makes `ssh2-password-expiry' and
`proxy-password-prompt' easier).

The new interaction abstraction has a lot of fields that are unused in
the current code (things like window captions); this is groundwork for
`gui-auth'. However, ssh.c still writes directly to stderr; that may
want to be fixed.

In the GUI apps, user interaction is moved to terminal.c. This should
make it easier to fix things like UTF-8 username entry, although I
haven't attempted to do so. Also, control character filtering can be
tailored to be appropriate for individual front-ends; so far I don't
promise anything other than not having made it any worse.

I've tried to test this fairly exhaustively (although Mac stuff is
untested, as usual). It all seems to basically work, but I bet there
are new bugs. (One I know about is that you can no longer make the
PuTTY window go away with a ^D at the password prompt; this should be
fixed.)

[originally from svn r6437]
[this svn revision also touched putty-wishlist]
This commit is contained in:
Jacob Nevins
2005-10-30 20:24:09 +00:00
parent d6c13bd154
commit 8719f92c14
18 changed files with 1354 additions and 828 deletions
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21
windows/winplink.c
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@ -189,6 +189,25 @@ int from_backend(void *frontend_handle, int is_stderr,
return osize + esize;
}
int from_backend_untrusted(void *frontend_handle, const char *data, int len)
{
/*
* No "untrusted" output should get here (the way the code is
* currently, it's all diverted by FLAG_STDERR).
*/
assert(!"Unexpected call to from_backend_untrusted()");
return 0; /* not reached */
}
int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
{
int ret;
ret = cmdline_get_passwd_input(p, in, inlen);
if (ret == -1)
ret = console_get_userpass_input(p, in, inlen);
return ret;
}
static DWORD main_thread_id;
void agent_schedule_callback(void (*callback)(void *, void *, int),
@ -285,8 +304,6 @@ int main(int argc, char **argv)
int use_subsystem = 0;
long now, next;
ssh_get_line = console_get_line;
sklist = NULL;
skcount = sksize = 0;
/*