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Refactor confirm_weak to use SeatDialogText.

Browse Source 
This centralises the messages for weak crypto algorithms (general, and
host keys in particular, the latter including a list of all the other
available host key types) into ssh/common.c, in much the same way as
we previously did for ordinary host key warnings.

The reason is the same too: I'm about to want to vary the text in one
of those dialog boxes, so it's convenient to start by putting it
somewhere that I can modify just once.
This commit is contained in:
Simon Tatham 2023-11-22 08:57:54 +00:00
parent f2e7086902
commit 9fcbb86f71
16 changed files with 342 additions and 218 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
console.c
View File

@ -9,18 +9,6 @@
#include "misc.h"
#include "console.h"
const char weakcrypto_msg_common_fmt[] =
"The first %s supported by the server is\n"
"%s, which is below the configured warning threshold.\n";
const char weakhk_msg_common_fmt[] =
"The first host key type we have stored for this server\n"
"is %s, which is below the configured warning threshold.\n"
"The server also provides the following types of host key\n"
"above the threshold, which we do not have stored:\n"
"%s\n";
const char console_continue_prompt[] = "Continue with connection? (y/n) ";
const char console_abandoned_msg[] = "Connection abandoned.\n";
const SeatDialogPromptDescriptions *console_prompt_descriptions(Seat *seat)
@ -30,6 +18,8 @@ const SeatDialogPromptDescriptions *console_prompt_descriptions(Seat *seat)
.hk_connect_once_action = "enter \"n\"",
.hk_cancel_action = "press Return",
.hk_cancel_action_Participle = "Pressing Return",
.weak_accept_action = "enter \"y\"",
.weak_cancel_action = "enter \"n\"",
};
return &descs;
}

48
proxy/sshproxy.c
View File

@ -430,8 +430,32 @@ static SeatPromptResult sshproxy_confirm_ssh_host_key(
return SPR_SW_ABORT("Noninteractive SSH proxy cannot confirm host key");
}
static void sshproxy_format_seatdialogtext(strbuf *sb, SeatDialogText *text)
{
for (SeatDialogTextItem *item = text->items,
*end = item+text->nitems; item < end; item++) {
switch (item->type) {
case SDT_SCARY_HEADING:
case SDT_PARA:
case SDT_DISPLAY:
put_stringz(sb, item->text);
put_byte(sb, '\n');
break;
case SDT_BATCH_ABORT:
put_stringz(sb, item->text);
put_byte(sb, '\n');
goto endloop;
default:
break;
}
}
endloop:
while (strbuf_chomp(sb, '\n'));
}
static SeatPromptResult sshproxy_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
SshProxy *sp = container_of(seat, SshProxy, seat);
@ -442,22 +466,24 @@ static SeatPromptResult sshproxy_confirm_weak_crypto_primitive(
* request on to it.
*/
return seat_confirm_weak_crypto_primitive(
wrap(sp->clientseat), algtype, algname, callback, ctx);
wrap(sp->clientseat), text, callback, ctx);
}
/*
* Otherwise, behave as if we're in batch mode: take the safest
* option.
*/
sshproxy_error(sp, "First %s supported by server is %s, below warning "
"threshold. Abandoning proxy SSH connection.",
algtype, algname);
strbuf *sb = strbuf_new();
sshproxy_format_seatdialogtext(sb, text);
sshproxy_error(sp, sb->s);
strbuf_free(sb);
return SPR_SW_ABORT("Noninteractive SSH proxy cannot confirm "
"weak crypto primitive");
}
static SeatPromptResult sshproxy_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
SshProxy *sp = container_of(seat, SshProxy, seat);
@ -468,16 +494,18 @@ static SeatPromptResult sshproxy_confirm_weak_cached_hostkey(
* request on to it.
*/
return seat_confirm_weak_cached_hostkey(
wrap(sp->clientseat), algname, betteralgs, callback, ctx);
wrap(sp->clientseat), text, callback, ctx);
}
/*
* Otherwise, behave as if we're in batch mode: take the safest
* option.
*/
sshproxy_error(sp, "First host key type stored for server is %s, below "
"warning threshold. Abandoning proxy SSH connection.",
algname);
strbuf *sb = strbuf_new();
sshproxy_format_seatdialogtext(sb, text);
sshproxy_error(sp, sb->s);
strbuf_free(sb);
return SPR_SW_ABORT("Noninteractive SSH proxy cannot confirm "
"weak cached host key");
}

24
putty.h
View File

@ -1293,7 +1293,7 @@ struct SeatVtable {
* confirm_ssh_host_key above.
*/
SeatPromptResult (*confirm_weak_crypto_primitive)(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
/*
@ -1304,11 +1304,10 @@ struct SeatVtable {
* This form is used in the case where we're using a host key
* below the warning threshold because that's the best one we have
* cached, but at least one host key algorithm *above* the
* threshold is available that we don't have cached. 'betteralgs'
* lists the better algorithm(s).
* threshold is available that we don't have cached.
*/
SeatPromptResult (*confirm_weak_cached_hostkey)(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
/*
@ -1444,15 +1443,15 @@ static inline SeatPromptResult seat_confirm_ssh_host_key(
{ return iseat.seat->vt->confirm_ssh_host_key(
iseat.seat, h, p, ktyp, kstr, text, helpctx, cb, ctx); }
static inline SeatPromptResult seat_confirm_weak_crypto_primitive(
InteractionReadySeat iseat, const char *atyp, const char *aname,
InteractionReadySeat iseat, SeatDialogText *text,
void (*cb)(void *ctx, SeatPromptResult result), void *ctx)
{ return iseat.seat->vt->confirm_weak_crypto_primitive(
iseat.seat, atyp, aname, cb, ctx); }
iseat.seat, text, cb, ctx); }
static inline SeatPromptResult seat_confirm_weak_cached_hostkey(
InteractionReadySeat iseat, const char *aname, const char *better,
InteractionReadySeat iseat, SeatDialogText *text,
void (*cb)(void *ctx, SeatPromptResult result), void *ctx)
{ return iseat.seat->vt->confirm_weak_cached_hostkey(
iseat.seat, aname, better, cb, ctx); }
iseat.seat, text, cb, ctx); }
static inline const SeatDialogPromptDescriptions *seat_prompt_descriptions(
Seat *seat)
{ return seat->vt->prompt_descriptions(seat); }
@ -1505,6 +1504,7 @@ struct SeatDialogPromptDescriptions {
const char *hk_accept_action;
const char *hk_connect_once_action;
const char *hk_cancel_action, *hk_cancel_action_Participle;
const char *weak_accept_action, *weak_cancel_action;
};
/* In the utils subdir: print a message to the Seat which can't be
@ -1537,10 +1537,10 @@ SeatPromptResult nullseat_confirm_ssh_host_key(
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult nullseat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult nullseat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
const SeatDialogPromptDescriptions *nullseat_prompt_descriptions(Seat *seat);
bool nullseat_is_never_utf8(Seat *seat);
@ -1573,10 +1573,10 @@ SeatPromptResult console_confirm_ssh_host_key(
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult console_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult console_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
StripCtrlChars *console_stripctrl_new(
Seat *seat, BinarySink *bs_out, SeatInteractionContext sic);

6
ssh.h
View File

@ -1908,6 +1908,12 @@ SeatPromptResult verify_ssh_host_key(
ssh_key *key, const char *keytype, char *keystr, const char *keydisp,
char **fingerprints, int ca_count,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult confirm_weak_crypto_primitive(
InteractionReadySeat iseat, const char *algtype, const char *algname,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult confirm_weak_cached_hostkey(
InteractionReadySeat iseat, const char *algname, const char **betteralgs,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
typedef struct ssh_transient_hostkey_cache ssh_transient_hostkey_cache;
ssh_transient_hostkey_cache *ssh_transient_hostkey_cache_new(void);

73
ssh/common.c
View File

@ -1085,6 +1085,79 @@ SeatPromptResult verify_ssh_host_key(
return toret;
}
SeatPromptResult confirm_weak_crypto_primitive(
InteractionReadySeat iseat, const char *algtype, const char *algname,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
SeatDialogText *text = seat_dialog_text_new();
const SeatDialogPromptDescriptions *pds =
seat_prompt_descriptions(iseat.seat);
seat_dialog_text_append(text, SDT_TITLE, "%s Security Alert", appname);
seat_dialog_text_append(
text, SDT_PARA,
"The first %s supported by the server is %s, "
"which is below the configured warning threshold.",
algtype, algname);
/* In batch mode, we print the above information and then this
* abort message, and stop. */
seat_dialog_text_append(text, SDT_BATCH_ABORT, "Connection abandoned.");
seat_dialog_text_append(
text, SDT_PARA, "To accept the risk and continue, %s. "
"To abandon the connection, %s.",
pds->weak_accept_action, pds->weak_cancel_action);
seat_dialog_text_append(text, SDT_PROMPT, "Continue with connection?");
SeatPromptResult toret = seat_confirm_weak_crypto_primitive(
iseat, text, callback, ctx);
seat_dialog_text_free(text);
return toret;
}
SeatPromptResult confirm_weak_cached_hostkey(
InteractionReadySeat iseat, const char *algname, const char **betteralgs,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
SeatDialogText *text = seat_dialog_text_new();
const SeatDialogPromptDescriptions *pds =
seat_prompt_descriptions(iseat.seat);
seat_dialog_text_append(text, SDT_TITLE, "%s Security Alert", appname);
seat_dialog_text_append(
text, SDT_PARA,
"The first host key type we have stored for this server "
"is %s, which is below the configured warning threshold.", algname);
seat_dialog_text_append(
text, SDT_PARA,
"The server also provides the following types of host key "
"above the threshold, which we do not have stored:");
for (const char **p = betteralgs; *p; p++)
seat_dialog_text_append(text, SDT_DISPLAY, "%s", *p);
/* In batch mode, we print the above information and then this
* abort message, and stop. */
seat_dialog_text_append(text, SDT_BATCH_ABORT, "Connection abandoned.");
seat_dialog_text_append(
text, SDT_PARA, "To accept the risk and continue, %s. "
"To abandon the connection, %s.",
pds->weak_accept_action, pds->weak_cancel_action);
seat_dialog_text_append(text, SDT_PROMPT, "Continue with connection?");
SeatPromptResult toret = seat_confirm_weak_cached_hostkey(
iseat, text, callback, ctx);
seat_dialog_text_free(text);
return toret;
}
/* ----------------------------------------------------------------------
* Common functions shared between SSH-1 layers.
*/

2
ssh/login1.c
View File

@ -323,7 +323,7 @@ static void ssh1_login_process_queue(PacketProtocolLayer *ppl)
/* Warn about chosen cipher if necessary. */
if (warn) {
s->spr = seat_confirm_weak_crypto_primitive(
s->spr = confirm_weak_crypto_primitive(
ppl_get_iseat(&s->ppl), "cipher", cipher_string,
ssh1_login_dialog_callback, s);
crMaybeWaitUntilV(s->spr.kind != SPRK_INCOMPLETE);

4
ssh/server.c
View File

@ -98,11 +98,11 @@ void mainchan_terminal_size(mainchan *mc, int width, int height) {}
/* Seat functions to ensure we don't get choosy about crypto - as the
* server, it's not up to us to give user warnings */
static SeatPromptResult server_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{ return SPR_OK; }
static SeatPromptResult server_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{ return SPR_OK; }

21
ssh/transport2.c
View File

@ -1514,7 +1514,8 @@ static void ssh2_transport_process_queue(PacketProtocolLayer *ppl)
if (s->warn_hk) {
int j, k;
char *betteralgs;
const char **betteralgs = NULL;
size_t nbetter = 0, bettersize = 0;
/*
* Change warning box wording depending on why we chose a
@ -1523,7 +1524,6 @@ static void ssh2_transport_process_queue(PacketProtocolLayer *ppl)
* could usefully cross-certify. Otherwise, use the same
* standard wording as any other weak crypto primitive.
*/
betteralgs = NULL;
for (j = 0; j < s->n_uncert_hostkeys; j++) {
const struct ssh_signkey_with_user_pref_id *hktype =
&ssh2_hostkey_algs[s->uncert_hostkeys[j]];
@ -1538,19 +1538,16 @@ static void ssh2_transport_process_queue(PacketProtocolLayer *ppl)
}
}
if (better) {
if (betteralgs) {
char *old_ba = betteralgs;
betteralgs = dupcat(betteralgs, ",", hktype->alg->ssh_id);
sfree(old_ba);
} else {
betteralgs = dupstr(hktype->alg->ssh_id);
}
sgrowarray(betteralgs, bettersize, nbetter);
betteralgs[nbetter++] = hktype->alg->ssh_id;
}
}
if (betteralgs) {
/* Use the special warning prompt that lets us provide
* a list of better algorithms */
s->spr = seat_confirm_weak_cached_hostkey(
sgrowarray(betteralgs, bettersize, nbetter);
betteralgs[nbetter] = NULL;
s->spr = confirm_weak_cached_hostkey(
ppl_get_iseat(&s->ppl), s->hostkey_alg->ssh_id, betteralgs,
ssh2_transport_dialog_callback, s);
sfree(betteralgs);
@ -2389,7 +2386,7 @@ static int ca_blob_compare(void *av, void *bv)
}
/*
* Wrapper on seat_confirm_weak_crypto_primitive(), which uses the
* Wrapper on confirm_weak_crypto_primitive(), which uses the
* tree234 s->weak_algorithms_consented_to to ensure we ask at most
* once about any given crypto primitive.
*/
@ -2401,7 +2398,7 @@ static SeatPromptResult ssh2_transport_confirm_weak_crypto_primitive(
return SPR_OK;
add234(s->weak_algorithms_consented_to, (void *)alg);
return seat_confirm_weak_crypto_primitive(
return confirm_weak_crypto_primitive(
ppl_get_iseat(&s->ppl), type, name, ssh2_transport_dialog_callback, s);
}

6
stubs/null-seat.c
View File

@ -26,11 +26,11 @@ SeatPromptResult nullseat_confirm_ssh_host_key(
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{ return SPR_SW_ABORT("this seat can't handle interactive prompts"); }
SeatPromptResult nullseat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{ return SPR_SW_ABORT("this seat can't handle interactive prompts"); }
SeatPromptResult nullseat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{ return SPR_SW_ABORT("this seat can't handle interactive prompts"); }
bool nullseat_is_never_utf8(Seat *seat) { return false; }
@ -60,6 +60,8 @@ const SeatDialogPromptDescriptions *nullseat_prompt_descriptions(Seat *seat)
.hk_connect_once_action = "",
.hk_cancel_action = "",
.hk_cancel_action_Participle = "",
.weak_accept_action = "",
.weak_cancel_action = "",
};
return &descs;
}

56
unix/console.c
View File

@ -102,20 +102,18 @@ static int block_and_read(int fd, void *buf, size_t len)
return ret;
}
SeatPromptResult console_confirm_ssh_host_key(
Seat *seat, const char *host, int port, const char *keytype,
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
/*
* Helper function to print the message from a SeatDialogText. Returns
* the final prompt to print on the input line, or NULL if a
* batch-mode abort is needed. In the latter case it will have printed
* the abort text already.
*/
static const char *console_print_seatdialogtext(SeatDialogText *text)
{
char line[32];
struct termios cf;
const char *prompt = NULL;
stdio_sink errsink[1];
stdio_sink_init(errsink, stderr);
premsg(&cf);
for (SeatDialogTextItem *item = text->items,
*end = item+text->nitems; item < end; item++) {
switch (item->type) {
@ -135,8 +133,7 @@ SeatPromptResult console_confirm_ssh_host_key(
if (console_batch_mode) {
fprintf(stderr, "%s\n", item->text);
fflush(stderr);
postmsg(&cf);
return SPR_SW_ABORT("Cannot confirm a host key in batch mode");
return NULL;
}
break;
case SDT_PROMPT:
@ -146,7 +143,26 @@ SeatPromptResult console_confirm_ssh_host_key(
break;
}
}
assert(prompt); /* something in the SeatDialogText should have set this */
return prompt;
}
SeatPromptResult console_confirm_ssh_host_key(
Seat *seat, const char *host, int port, const char *keytype,
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
char line[32];
struct termios cf;
premsg(&cf);
const char *prompt = console_print_seatdialogtext(text);
if (!prompt) {
postmsg(&cf);
return SPR_SW_ABORT("Cannot confirm a host key in batch mode");
}
while (true) {
fprintf(stderr,
@ -202,23 +218,22 @@ SeatPromptResult console_confirm_ssh_host_key(
}
SeatPromptResult console_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
char line[32];
struct termios cf;
premsg(&cf);
fprintf(stderr, weakcrypto_msg_common_fmt, algtype, algname);
if (console_batch_mode) {
fputs(console_abandoned_msg, stderr);
const char *prompt = console_print_seatdialogtext(text);
if (!prompt) {
postmsg(&cf);
return SPR_SW_ABORT("Cannot confirm a weak crypto primitive "
"in batch mode");
}
fputs(console_continue_prompt, stderr);
fprintf(stderr, "%s (y/n) ", prompt);
fflush(stderr);
{
@ -244,23 +259,22 @@ SeatPromptResult console_confirm_weak_crypto_primitive(
}
SeatPromptResult console_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
char line[32];
struct termios cf;
premsg(&cf);
fprintf(stderr, weakhk_msg_common_fmt, algname, betteralgs);
if (console_batch_mode) {
fputs(console_abandoned_msg, stderr);
const char *prompt = console_print_seatdialogtext(text);
if (!prompt) {
postmsg(&cf);
return SPR_SW_ABORT("Cannot confirm a weak cached host key "
"in batch mode");
}
fputs(console_continue_prompt, stderr);
fprintf(stderr, "%s (y/n) ", prompt);
fflush(stderr);
{

118
unix/dialog.c
View File

@ -3609,10 +3609,54 @@ const SeatDialogPromptDescriptions *gtk_seat_prompt_descriptions(Seat *seat)
.hk_connect_once_action = "press \"Connect Once\"",
.hk_cancel_action = "press \"Cancel\"",
.hk_cancel_action_Participle = "Pressing \"Cancel\"",
.weak_accept_action = "press \"Yes\"",
.weak_cancel_action = "press \"No\"",
};
return &descs;
}
/*
* Format a SeatDialogText into a strbuf, also adjusting the box width
* to cope with displayed text. Returns the dialog box title.
*/
static const char *gtk_format_seatdialogtext(
SeatDialogText *text, strbuf *dlg_text, int *width)
{
const char *dlg_title = NULL;
for (SeatDialogTextItem *item = text->items,
*end = item + text->nitems; item < end; item++) {
switch (item->type) {
case SDT_PARA:
put_fmt(dlg_text, "%s\n\n", item->text);
break;
case SDT_DISPLAY: {
put_fmt(dlg_text, "%s\n\n", item->text);
int thiswidth = string_width(item->text);
if (*width < thiswidth)
*width = thiswidth;
break;
}
case SDT_SCARY_HEADING:
/* Can't change font size or weight in this context */
put_fmt(dlg_text, "%s\n\n", item->text);
break;
case SDT_TITLE:
dlg_title = item->text;
break;
default:
break;
}
}
/*
* Trim trailing newlines.
*/
while (strbuf_chomp(dlg_text, '\n'));
return dlg_title;
}
SeatPromptResult gtk_seat_confirm_ssh_host_key(
Seat *seat, const char *host, int port, const char *keytype,
char *keystr, SeatDialogText *text, HelpCtx helpctx,
@ -3627,35 +3671,9 @@ SeatPromptResult gtk_seat_confirm_ssh_host_key(
button_array_hostkey, lenof(button_array_hostkey),
};
const char *dlg_title = NULL;
strbuf *dlg_text = strbuf_new();
int width = string_width("default dialog width determination string");
for (SeatDialogTextItem *item = text->items,
*end = item + text->nitems; item < end; item++) {
switch (item->type) {
case SDT_PARA:
put_fmt(dlg_text, "%s\n\n", item->text);
break;
case SDT_DISPLAY: {
put_fmt(dlg_text, "%s\n\n", item->text);
int thiswidth = string_width(item->text);
if (width < thiswidth)
width = thiswidth;
break;
}
case SDT_SCARY_HEADING:
/* Can't change font size or weight in this context */
put_fmt(dlg_text, "%s\n\n", item->text);
break;
case SDT_TITLE:
dlg_title = item->text;
break;
default:
break;
}
}
while (strbuf_chomp(dlg_text, '\n'));
strbuf *dlg_text = strbuf_new();
const char *dlg_title = gtk_format_seatdialogtext(text, dlg_text, &width);
GtkWidget *mainwin, *msgbox;
@ -3752,19 +3770,16 @@ static void simple_prompt_result_spr_callback(void *vctx, int result)
* below the configured 'warn' threshold).
*/
SeatPromptResult gtk_seat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
static const char msg[] =
"The first %s supported by the server is "
"%s, which is below the configured warning threshold.\n"
"Continue with connection?";
char *text;
struct simple_prompt_result_spr_ctx *result_ctx;
GtkWidget *mainwin, *msgbox;
text = dupprintf(msg, algtype, algname);
int width = string_width("Reasonably long line of text "
"as a width template");
strbuf *dlg_text = strbuf_new();
const char *dlg_title = gtk_format_seatdialogtext(text, dlg_text, &width);
result_ctx = snew(struct simple_prompt_result_spr_ctx);
result_ctx->callback = callback;
@ -3774,33 +3789,26 @@ SeatPromptResult gtk_seat_confirm_weak_crypto_primitive(
mainwin = GTK_WIDGET(gtk_seat_get_window(seat));
msgbox = create_message_box(
mainwin, "PuTTY Security Alert", text,
string_width("Reasonably long line of text as a width template"),
false, &buttons_yn, simple_prompt_result_spr_callback, result_ctx);
mainwin, dlg_title, dlg_text->s, width, false,
&buttons_yn, simple_prompt_result_spr_callback, result_ctx);
register_dialog(seat, result_ctx->dialog_slot, msgbox);
sfree(text);
strbuf_free(dlg_text);
return SPR_INCOMPLETE;
}
SeatPromptResult gtk_seat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
static const char msg[] =
"The first host key type we have stored for this server\n"
"is %s, which is below the configured warning threshold.\n"
"The server also provides the following types of host key\n"
"above the threshold, which we do not have stored:\n"
"%s\n"
"Continue with connection?";
char *text;
struct simple_prompt_result_spr_ctx *result_ctx;
GtkWidget *mainwin, *msgbox;
text = dupprintf(msg, algname, betteralgs);
int width = string_width("is ecdsa-nistp521, which is below the configured"
" warning threshold.");
strbuf *dlg_text = strbuf_new();
const char *dlg_title = gtk_format_seatdialogtext(text, dlg_text, &width);
result_ctx = snew(struct simple_prompt_result_spr_ctx);
result_ctx->callback = callback;
@ -3810,13 +3818,11 @@ SeatPromptResult gtk_seat_confirm_weak_cached_hostkey(
mainwin = GTK_WIDGET(gtk_seat_get_window(seat));
msgbox = create_message_box(
mainwin, "PuTTY Security Alert", text,
string_width("is ecdsa-nistp521, which is below the configured"
" warning threshold."),
false, &buttons_yn, simple_prompt_result_spr_callback, result_ctx);
mainwin, dlg_title, dlg_text->s, width, false,
&buttons_yn, simple_prompt_result_spr_callback, result_ctx);
register_dialog(seat, result_ctx->dialog_slot, msgbox);
sfree(text);
strbuf_free(dlg_text);
return SPR_INCOMPLETE;
}

4
unix/platform.h
View File

@ -225,10 +225,10 @@ SeatPromptResult gtk_seat_confirm_ssh_host_key(
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult gtk_seat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult gtk_seat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
const SeatDialogPromptDescriptions *gtk_seat_prompt_descriptions(Seat *seat);
#ifdef MAY_REFER_TO_GTK_IN_HEADERS

4
utils/tempseat.c
View File

@ -255,7 +255,7 @@ static SeatPromptResult tempseat_confirm_ssh_host_key(
}
static SeatPromptResult tempseat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
unreachable("confirm_weak_crypto_primitive "
@ -263,7 +263,7 @@ static SeatPromptResult tempseat_confirm_weak_crypto_primitive(
}
static SeatPromptResult tempseat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
unreachable("confirm_weak_cached_hostkey "

64
windows/console.c
View File

@ -32,20 +32,18 @@ void console_print_error_msg(const char *prefix, const char *msg)
fflush(stderr);
}
SeatPromptResult console_confirm_ssh_host_key(
Seat *seat, const char *host, int port, const char *keytype,
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
/*
* Helper function to print the message from a SeatDialogText. Returns
* the final prompt to print on the input line, or NULL if a
* batch-mode abort is needed. In the latter case it will have printed
* the abort text already.
*/
static const char *console_print_seatdialogtext(SeatDialogText *text)
{
HANDLE hin;
DWORD savemode, i;
const char *prompt = NULL;
stdio_sink errsink[1];
stdio_sink_init(errsink, stderr);
char line[32];
for (SeatDialogTextItem *item = text->items,
*end = item+text->nitems; item < end; item++) {
switch (item->type) {
@ -65,7 +63,7 @@ SeatPromptResult console_confirm_ssh_host_key(
if (console_batch_mode) {
fprintf(stderr, "%s\n", item->text);
fflush(stderr);
return SPR_SW_ABORT("Cannot confirm a host key in batch mode");
return NULL;
}
break;
case SDT_PROMPT:
@ -76,6 +74,22 @@ SeatPromptResult console_confirm_ssh_host_key(
}
}
assert(prompt); /* something in the SeatDialogText should have set this */
return prompt;
}
SeatPromptResult console_confirm_ssh_host_key(
Seat *seat, const char *host, int port, const char *keytype,
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
HANDLE hin;
DWORD savemode, i;
const char *prompt = console_print_seatdialogtext(text);
if (!prompt)
return SPR_SW_ABORT("Cannot confirm a host key in batch mode");
char line[32];
while (true) {
fprintf(stderr,
@ -128,23 +142,20 @@ SeatPromptResult console_confirm_ssh_host_key(
}
SeatPromptResult console_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
HANDLE hin;
DWORD savemode, i;
char line[32];
fprintf(stderr, weakcrypto_msg_common_fmt, algtype, algname);
if (console_batch_mode) {
fputs(console_abandoned_msg, stderr);
const char *prompt = console_print_seatdialogtext(text);
if (!prompt)
return SPR_SW_ABORT("Cannot confirm a weak crypto primitive "
"in batch mode");
}
fputs(console_continue_prompt, stderr);
char line[32];
fprintf(stderr, "%s (y/n) ", prompt);
fflush(stderr);
hin = GetStdHandle(STD_INPUT_HANDLE);
@ -163,23 +174,20 @@ SeatPromptResult console_confirm_weak_crypto_primitive(
}
SeatPromptResult console_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
HANDLE hin;
DWORD savemode, i;
char line[32];
fprintf(stderr, weakhk_msg_common_fmt, algname, betteralgs);
if (console_batch_mode) {
fputs(console_abandoned_msg, stderr);
const char *prompt = console_print_seatdialogtext(text);
if (!prompt)
return SPR_SW_ABORT("Cannot confirm a weak cached host key "
"in batch mode");
}
fputs(console_continue_prompt, stderr);
char line[32];
fprintf(stderr, "%s (y/n) ", prompt);
fflush(stderr);
hin = GetStdHandle(STD_INPUT_HANDLE);

112
windows/dialog.c
View File

@ -963,6 +963,39 @@ static INT_PTR HostKeyMoreInfoProc(HWND hwnd, UINT msg, WPARAM wParam,
return 0;
}
static const char *process_seatdialogtext(
strbuf *dlg_text, const char **scary_heading, SeatDialogText *text)
{
const char *dlg_title = "";
for (SeatDialogTextItem *item = text->items,
*end = item + text->nitems; item < end; item++) {
switch (item->type) {
case SDT_PARA:
put_fmt(dlg_text, "%s\r\n\r\n", item->text);
break;
case SDT_DISPLAY:
put_fmt(dlg_text, "%s\r\n\r\n", item->text);
break;
case SDT_SCARY_HEADING:
assert(scary_heading != NULL && "only expect a scary heading if "
"the dialog has somewhere to put it");
*scary_heading = item->text;
break;
case SDT_TITLE:
dlg_title = item->text;
break;
default:
break;
}
}
/* Trim any trailing newlines */
while (strbuf_chomp(dlg_text, '\r') || strbuf_chomp(dlg_text, '\n'));
return dlg_title;
}
static INT_PTR HostKeyDialogProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam, void *vctx)
{
@ -971,32 +1004,15 @@ static INT_PTR HostKeyDialogProc(HWND hwnd, UINT msg,
switch (msg) {
case WM_INITDIALOG: {
strbuf *dlg_text = strbuf_new();
const char *dlg_title = "";
ctx->has_title = false;
LPCTSTR iconid = IDI_QUESTION;
const char *scary_heading = NULL;
const char *dlg_title = process_seatdialogtext(
dlg_text, &scary_heading, ctx->text);
for (SeatDialogTextItem *item = ctx->text->items,
*end = item + ctx->text->nitems; item < end; item++) {
switch (item->type) {
case SDT_PARA:
put_fmt(dlg_text, "%s\r\n\r\n", item->text);
break;
case SDT_DISPLAY:
put_fmt(dlg_text, "%s\r\n\r\n", item->text);
break;
case SDT_SCARY_HEADING:
SetDlgItemText(hwnd, IDC_HK_TITLE, item->text);
iconid = IDI_WARNING;
ctx->has_title = true;
break;
case SDT_TITLE:
dlg_title = item->text;
break;
default:
break;
}
LPCTSTR iconid = IDI_QUESTION;
if (scary_heading) {
SetDlgItemText(hwnd, IDC_HK_TITLE, scary_heading);
iconid = IDI_WARNING;
}
while (strbuf_chomp(dlg_text, '\r') || strbuf_chomp(dlg_text, '\n'));
SetDlgItemText(hwnd, IDC_HK_TEXT, dlg_text->s);
MakeDlgItemBorderless(hwnd, IDC_HK_TEXT);
@ -1135,6 +1151,8 @@ const SeatDialogPromptDescriptions *win_seat_prompt_descriptions(Seat *seat)
.hk_connect_once_action = "press \"Connect Once\"",
.hk_cancel_action = "press \"Cancel\"",
.hk_cancel_action_Participle = "Pressing \"Cancel\"",
.weak_accept_action = "press \"Yes\"",
.weak_cancel_action = "press \"No\"",
};
return &descs;
}
@ -1169,25 +1187,17 @@ SeatPromptResult win_seat_confirm_ssh_host_key(
* below the configured 'warn' threshold).
*/
SeatPromptResult win_seat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
static const char mbtitle[] = "%s Security Alert";
static const char msg[] =
"The first %s supported by the server\n"
"is %s, which is below the configured\n"
"warning threshold.\n"
"Do you want to continue with this connection?\n";
char *message, *title;
int mbret;
strbuf *dlg_text = strbuf_new();
const char *dlg_title = process_seatdialogtext(dlg_text, NULL, text);
message = dupprintf(msg, algtype, algname);
title = dupprintf(mbtitle, appname);
mbret = MessageBox(NULL, message, title,
MB_ICONWARNING | MB_YESNO | MB_DEFBUTTON2);
int mbret = MessageBox(NULL, dlg_text->s, dlg_title,
MB_ICONWARNING | MB_YESNO | MB_DEFBUTTON2);
socket_reselect_all();
sfree(message);
sfree(title);
strbuf_free(dlg_text);
if (mbret == IDYES)
return SPR_OK;
else
@ -1195,27 +1205,17 @@ SeatPromptResult win_seat_confirm_weak_crypto_primitive(
}
SeatPromptResult win_seat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx)
{
static const char mbtitle[] = "%s Security Alert";
static const char msg[] =
"The first host key type we have stored for this server\n"
"is %s, which is below the configured warning threshold.\n"
"The server also provides the following types of host key\n"
"above the threshold, which we do not have stored:\n"
"%s\n"
"Do you want to continue with this connection?\n";
char *message, *title;
int mbret;
strbuf *dlg_text = strbuf_new();
const char *dlg_title = process_seatdialogtext(dlg_text, NULL, text);
message = dupprintf(msg, algname, betteralgs);
title = dupprintf(mbtitle, appname);
mbret = MessageBox(NULL, message, title,
MB_ICONWARNING | MB_YESNO | MB_DEFBUTTON2);
int mbret = MessageBox(NULL, dlg_text->s, dlg_title,
MB_ICONWARNING | MB_YESNO | MB_DEFBUTTON2);
socket_reselect_all();
sfree(message);
sfree(title);
strbuf_free(dlg_text);
if (mbret == IDYES)
return SPR_OK;
else

4
windows/platform.h
View File

@ -237,10 +237,10 @@ SeatPromptResult win_seat_confirm_ssh_host_key(
char *keystr, SeatDialogText *text, HelpCtx helpctx,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult win_seat_confirm_weak_crypto_primitive(
Seat *seat, const char *algtype, const char *algname,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
SeatPromptResult win_seat_confirm_weak_cached_hostkey(
Seat *seat, const char *algname, const char *betteralgs,
Seat *seat, SeatDialogText *text,
void (*callback)(void *ctx, SeatPromptResult result), void *ctx);
const SeatDialogPromptDescriptions *win_seat_prompt_descriptions(Seat *seat);