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Fix to allow more than one challenge/response pair during

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keyboard-interactive authentication. UNTESTED except that I checked
it compiles. Will ask for testing from the user who complained.

[originally from svn r1195]
This commit is contained in:
Simon Tatham 2001-08-22 19:47:05 +00:00
parent 31a6d909bf
commit 96fd4be809
1 changed files with 21 additions and 4 deletions
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25
ssh.c
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@ -3323,6 +3323,7 @@ static void do_ssh2_authconn(unsigned char *in, int inlen, int ispkt)
} type;
static int gotit, need_pw, can_pubkey, can_passwd, can_keyb_inter;
static int tried_pubkey_config, tried_agent, tried_keyb_inter;
static int kbd_inter_running;
static int we_are_in;
static int num_prompts, echo;
static char username[100];
@ -3457,6 +3458,8 @@ static void do_ssh2_authconn(unsigned char *in, int inlen, int ispkt)
tried_pubkey_config = FALSE;
tried_agent = FALSE;
tried_keyb_inter = FALSE;
kbd_inter_running = FALSE;
while (1) {
/*
@ -3488,9 +3491,14 @@ static void do_ssh2_authconn(unsigned char *in, int inlen, int ispkt)
break;
}
if (pktin.type != SSH2_MSG_USERAUTH_FAILURE) {
bombout(
("Strange packet received during authentication: type %d",
if (kbd_inter_running &&
pktin.type == SSH2_MSG_USERAUTH_INFO_REQUEST) {
/*
* This is a further prompt in keyboard-interactive
* authentication. Do nothing.
*/
} else if (!pktin.type != SSH2_MSG_USERAUTH_FAILURE) {
bombout(("Strange packet received during authentication: type %d",
pktin.type));
crReturnV;
}
@ -3502,10 +3510,11 @@ static void do_ssh2_authconn(unsigned char *in, int inlen, int ispkt)
* we can look at the string in it and know what we can
* helpfully try next.
*/
{
if (pktin.type == SSH2_MSG_USERAUTH_FAILURE) {
char *methods;
int methlen;
ssh2_pkt_getstring(&methods, &methlen);
kbd_inter_running = FALSE;
if (!ssh2_pkt_getbool()) {
/*
* We have received an unequivocal Access
@ -3584,6 +3593,14 @@ static void do_ssh2_authconn(unsigned char *in, int inlen, int ispkt)
continue;
}
kbd_inter_running = TRUE;
}
if (kbd_inter_running) {
method = AUTH_KEYBOARD_INTERACTIVE;
type = AUTH_TYPE_KEYBOARD_INTERACTIVE;
tried_keyb_inter = TRUE;
/* We've got packet with that "interactive" info
dump banners, and set its prompt as ours */
{