зеркало из https://github.com/github/putty.git
843 строки
27 KiB
C
843 строки
27 KiB
C
/*
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* SSH server for Unix: main program.
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*
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* ======================================================================
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*
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* This server is NOT SECURE!
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*
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* DO NOT DEPLOY IT IN A HOSTILE-FACING ENVIRONMENT!
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*
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* Its purpose is to speak the server end of everything PuTTY speaks
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* on the client side, so that I can test that I haven't broken PuTTY
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* when I reorganise its code, even things like RSA key exchange or
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* chained auth methods which it's hard to find a server that speaks
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* at all.
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*
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* It has no interaction with the OS's authentication system: the
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* authentications it will accept are configurable by command-line
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* option, and once you authenticate, it will run the connection
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* protocol - including all subprocesses and shells - under the same
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* Unix user id you started it under.
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*
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* It really is only suitable for testing the actual SSH protocol.
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* Don't use it for anything more serious!
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*
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* ======================================================================
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <assert.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <pwd.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include "putty.h"
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#include "mpint.h"
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#include "ssh.h"
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#include "sshserver.h"
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const char *const appname = "uppity";
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void modalfatalbox(const char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "FATAL ERROR: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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exit(1);
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}
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void nonfatal(const char *p, ...)
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{
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va_list ap;
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fprintf(stderr, "ERROR: ");
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va_start(ap, p);
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vfprintf(stderr, p, ap);
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va_end(ap);
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fputc('\n', stderr);
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}
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char *platform_default_s(const char *name)
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{
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return NULL;
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}
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bool platform_default_b(const char *name, bool def)
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{
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return def;
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}
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int platform_default_i(const char *name, int def)
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{
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return def;
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}
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FontSpec *platform_default_fontspec(const char *name)
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{
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return fontspec_new("");
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}
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Filename *platform_default_filename(const char *name)
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{
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return filename_from_str("");
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}
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char *x_get_default(const char *key)
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{
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return NULL; /* this is a stub */
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}
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void old_keyfile_warning(void) { }
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void timer_change_notify(unsigned long next)
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{
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}
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char *platform_get_x_display(void) { return NULL; }
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static bool verbose;
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struct AuthPolicyShared {
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struct AuthPolicy_ssh1_pubkey *ssh1keys;
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struct AuthPolicy_ssh2_pubkey *ssh2keys;
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};
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struct AuthPolicy {
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struct AuthPolicyShared *shared;
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int kbdint_state;
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};
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struct server_instance {
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unsigned id;
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AuthPolicy ap;
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LogPolicy logpolicy;
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};
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static void log_to_stderr(unsigned id, const char *msg)
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{
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if (id != (unsigned)-1)
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fprintf(stderr, "#%u: ", id);
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fputs(msg, stderr);
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fputc('\n', stderr);
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fflush(stderr);
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}
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static void server_eventlog(LogPolicy *lp, const char *event)
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{
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struct server_instance *inst = container_of(
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lp, struct server_instance, logpolicy);
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if (verbose)
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log_to_stderr(inst->id, event);
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}
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static void server_logging_error(LogPolicy *lp, const char *event)
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{
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struct server_instance *inst = container_of(
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lp, struct server_instance, logpolicy);
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log_to_stderr(inst->id, event); /* unconditional */
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}
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static int server_askappend(
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LogPolicy *lp, Filename *filename,
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void (*callback)(void *ctx, int result), void *ctx)
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{
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return 2; /* always overwrite (FIXME: could make this a cmdline option) */
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}
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static const LogPolicyVtable server_logpolicy_vt = {
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server_eventlog,
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server_askappend,
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server_logging_error,
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null_lp_verbose_no,
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};
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struct AuthPolicy_ssh1_pubkey {
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RSAKey key;
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struct AuthPolicy_ssh1_pubkey *next;
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};
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struct AuthPolicy_ssh2_pubkey {
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ptrlen public_blob;
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struct AuthPolicy_ssh2_pubkey *next;
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};
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unsigned auth_methods(AuthPolicy *ap)
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{
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return (AUTHMETHOD_PUBLICKEY | AUTHMETHOD_PASSWORD | AUTHMETHOD_KBDINT |
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AUTHMETHOD_TIS | AUTHMETHOD_CRYPTOCARD);
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}
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bool auth_none(AuthPolicy *ap, ptrlen username)
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{
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return false;
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}
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int auth_password(AuthPolicy *ap, ptrlen username, ptrlen password,
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ptrlen *new_password_opt)
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{
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const char *PHONY_GOOD_PASSWORD = "weasel";
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const char *PHONY_BAD_PASSWORD = "ferret";
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if (!new_password_opt) {
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/* Accept login with our preconfigured good password */
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if (ptrlen_eq_string(password, PHONY_GOOD_PASSWORD))
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return 1;
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/* Don't outright reject the bad password, but insist on a change */
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if (ptrlen_eq_string(password, PHONY_BAD_PASSWORD))
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return 2;
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/* Reject anything else */
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return 0;
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} else {
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/* In a password-change request, expect the bad password as input */
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if (!ptrlen_eq_string(password, PHONY_BAD_PASSWORD))
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return 0;
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/* Accept a request to change it to the good password */
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if (ptrlen_eq_string(*new_password_opt, PHONY_GOOD_PASSWORD))
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return 1;
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/* Outright reject a request to change it to the same password
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* as it already 'was' */
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if (ptrlen_eq_string(*new_password_opt, PHONY_BAD_PASSWORD))
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return 0;
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/* Anything else, pretend the new pw wasn't good enough, and
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* re-request a change */
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return 2;
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}
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}
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bool auth_publickey(AuthPolicy *ap, ptrlen username, ptrlen public_blob)
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{
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struct AuthPolicy_ssh2_pubkey *iter;
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for (iter = ap->shared->ssh2keys; iter; iter = iter->next) {
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if (ptrlen_eq_ptrlen(public_blob, iter->public_blob))
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return true;
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}
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return false;
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}
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RSAKey *auth_publickey_ssh1(
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AuthPolicy *ap, ptrlen username, mp_int *rsa_modulus)
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{
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struct AuthPolicy_ssh1_pubkey *iter;
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for (iter = ap->shared->ssh1keys; iter; iter = iter->next) {
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if (mp_cmp_eq(rsa_modulus, iter->key.modulus))
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return &iter->key;
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}
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return NULL;
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}
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AuthKbdInt *auth_kbdint_prompts(AuthPolicy *ap, ptrlen username)
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{
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AuthKbdInt *aki;
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switch (ap->kbdint_state) {
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case 0:
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aki = snew(AuthKbdInt);
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aki->title = dupstr("Initial double prompt");
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aki->instruction =
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dupstr("First prompt should echo, second should not");
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aki->nprompts = 2;
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aki->prompts = snewn(aki->nprompts, AuthKbdIntPrompt);
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aki->prompts[0].prompt = dupstr("Echoey prompt: ");
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aki->prompts[0].echo = true;
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aki->prompts[1].prompt = dupstr("Silent prompt: ");
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aki->prompts[1].echo = false;
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return aki;
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case 1:
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aki = snew(AuthKbdInt);
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aki->title = dupstr("Zero-prompt step");
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aki->instruction = dupstr("Shouldn't see any prompts this time");
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aki->nprompts = 0;
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aki->prompts = NULL;
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return aki;
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default:
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ap->kbdint_state = 0;
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return NULL;
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}
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}
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int auth_kbdint_responses(AuthPolicy *ap, const ptrlen *responses)
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{
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switch (ap->kbdint_state) {
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case 0:
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if (ptrlen_eq_string(responses[0], "stoat") &&
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ptrlen_eq_string(responses[1], "weasel")) {
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ap->kbdint_state++;
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return 0; /* those are the expected responses */
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} else {
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ap->kbdint_state = 0;
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return -1;
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}
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break;
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case 1:
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return +1; /* succeed after the zero-prompt step */
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default:
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ap->kbdint_state = 0;
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return -1;
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}
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}
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char *auth_ssh1int_challenge(AuthPolicy *ap, unsigned method, ptrlen username)
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{
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/* FIXME: test returning a challenge string without \n, and ensure
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* it gets printed as a prompt in its own right, without PuTTY
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* making up a "Response: " prompt to follow it */
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return dupprintf("This is a dummy %s challenge!\n",
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(method == AUTHMETHOD_TIS ? "TIS" : "CryptoCard"));
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}
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bool auth_ssh1int_response(AuthPolicy *ap, ptrlen response)
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{
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return ptrlen_eq_string(response, "otter");
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}
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bool auth_successful(AuthPolicy *ap, ptrlen username, unsigned method)
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{
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return true;
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}
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static void safety_warning(FILE *fp)
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{
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fputs(" =================================================\n"
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" THIS SSH SERVER IS NOT WRITTEN TO BE SECURE!\n"
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" DO NOT DEPLOY IT IN A HOSTILE-FACING ENVIRONMENT!\n"
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" =================================================\n", fp);
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}
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static void show_help(FILE *fp)
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{
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safety_warning(fp);
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fputs("\n"
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"usage: uppity [options]\n"
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"options: --listen [PORT|PATH] listen to a port on localhost, or Unix socket\n"
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" --listen-once (with --listen) stop after one "
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"connection\n"
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" --hostkey KEY SSH host key (need at least one)\n"
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" --rsakexkey KEY key for SSH-2 RSA key exchange "
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"(in SSH-1 format)\n"
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" --userkey KEY public key"
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" acceptable for user authentication\n"
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" --sessiondir DIR cwd for session subprocess (default $HOME)\n"
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" --bannertext TEXT send TEXT as SSH-2 auth banner\n"
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" --bannerfile FILE send contents of FILE as SSH-2 auth "
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"banner\n"
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" --kexinit-kex STR override list of SSH-2 KEX methods\n"
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" --kexinit-hostkey STR override list of SSH-2 host key "
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"types\n"
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" --kexinit-cscipher STR override list of SSH-2 "
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"client->server ciphers\n"
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" --kexinit-sccipher STR override list of SSH-2 "
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"server->client ciphers\n"
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" --kexinit-csmac STR override list of SSH-2 "
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"client->server MACs\n"
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" --kexinit-scmac STR override list of SSH-2 "
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"server->client MACs\n"
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" --kexinit-cscomp STR override list of SSH-2 "
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"c->s compression types\n"
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" --kexinit-sccomp STR override list of SSH-2 "
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"s->c compression types\n"
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" --ssh1-ciphers STR override list of SSH-1 ciphers\n"
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" --ssh1-no-compression forbid compression in SSH-1\n"
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" --exitsignum send buggy numeric \"exit-signal\" "
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"message\n"
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" --verbose print event log messages to standard "
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"output\n"
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" --sshlog FILE write SSH packet log to FILE\n"
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" --sshrawlog FILE write SSH packets + raw data log"
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" to FILE\n"
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"also: uppity --help show this text\n"
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" uppity --version show version information\n"
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"\n", fp);
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safety_warning(fp);
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}
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static void show_version_and_exit(void)
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{
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char *buildinfo_text = buildinfo("\n");
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printf("%s: %s\n%s\n", appname, ver, buildinfo_text);
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sfree(buildinfo_text);
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exit(0);
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}
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const bool buildinfo_gtk_relevant = false;
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static bool listening = false, listen_once = false;
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static bool finished = false;
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void server_instance_terminated(LogPolicy *lp)
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{
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struct server_instance *inst = container_of(
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lp, struct server_instance, logpolicy);
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if (listening && !listen_once) {
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log_to_stderr(inst->id, "connection terminated");
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} else {
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finished = true;
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}
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sfree(inst);
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}
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static bool longoptarg(const char *arg, const char *expected,
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const char **val, int *argcp, char ***argvp)
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{
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int len = strlen(expected);
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if (memcmp(arg, expected, len))
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return false;
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if (arg[len] == '=') {
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*val = arg + len + 1;
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return true;
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} else if (arg[len] == '\0') {
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if (--*argcp > 0) {
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*val = *++*argvp;
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return true;
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} else {
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fprintf(stderr, "%s: option %s expects an argument\n",
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appname, expected);
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exit(1);
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}
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}
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return false;
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}
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static bool longoptnoarg(const char *arg, const char *expected)
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{
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int len = strlen(expected);
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if (memcmp(arg, expected, len))
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return false;
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if (arg[len] == '=') {
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fprintf(stderr, "%s: option %s expects no argument\n",
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appname, expected);
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exit(1);
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} else if (arg[len] == '\0') {
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return true;
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}
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return false;
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}
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struct server_config {
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Conf *conf;
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const SshServerConfig *ssc;
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ssh_key **hostkeys;
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int nhostkeys;
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RSAKey *hostkey1;
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struct AuthPolicyShared *ap_shared;
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unsigned next_id;
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Socket *listening_socket;
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Plug listening_plug;
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};
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static Plug *server_conn_plug(
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struct server_config *cfg, struct server_instance **inst_out)
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{
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struct server_instance *inst = snew(struct server_instance);
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memset(inst, 0, sizeof(*inst));
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inst->id = cfg->next_id++;
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inst->ap.shared = cfg->ap_shared;
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inst->logpolicy.vt = &server_logpolicy_vt;
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if (inst_out)
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*inst_out = inst;
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return ssh_server_plug(
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cfg->conf, cfg->ssc, cfg->hostkeys, cfg->nhostkeys, cfg->hostkey1,
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&inst->ap, &inst->logpolicy, &unix_live_sftpserver_vt);
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}
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static void server_log(Plug *plug, PlugLogType type, SockAddr *addr, int port,
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const char *error_msg, int error_code)
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{
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log_to_stderr((unsigned)-1, error_msg);
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}
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static void server_closing(Plug *plug, const char *error_msg, int error_code,
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bool calling_back)
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{
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log_to_stderr((unsigned)-1, error_msg);
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}
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static int server_accepting(Plug *p, accept_fn_t constructor, accept_ctx_t ctx)
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{
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struct server_config *cfg = container_of(
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p, struct server_config, listening_plug);
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Socket *s;
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const char *err;
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struct server_instance *inst;
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if (listen_once) {
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if (!cfg->listening_socket) /* in case of rapid double-accept */
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return 1;
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sk_close(cfg->listening_socket);
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cfg->listening_socket = NULL;
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}
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unsigned old_next_id = cfg->next_id;
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Plug *plug = server_conn_plug(cfg, &inst);
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s = constructor(ctx, plug);
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if ((err = sk_socket_error(s)) != NULL)
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return 1;
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SocketPeerInfo *pi = sk_peer_info(s);
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if (pi->addressfamily != ADDRTYPE_LOCAL && !sk_peer_trusted(s)) {
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fprintf(stderr, "rejected connection from %s (untrustworthy peer)\n",
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pi->log_text);
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sk_free_peer_info(pi);
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sk_close(s);
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cfg->next_id = old_next_id;
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return 1;
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}
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char *msg = dupprintf("new connection from %s", pi->log_text);
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log_to_stderr(inst->id, msg);
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sfree(msg);
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sk_free_peer_info(pi);
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sk_set_frozen(s, false);
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ssh_server_start(plug, s);
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return 0;
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}
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static const PlugVtable server_plugvt = {
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server_log,
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server_closing,
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NULL, /* recv */
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NULL, /* send */
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server_accepting
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};
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int main(int argc, char **argv)
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{
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int listen_port = -1;
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const char *listen_socket = NULL;
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ssh_key **hostkeys = NULL;
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size_t nhostkeys = 0, hostkeysize = 0;
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RSAKey *hostkey1 = NULL;
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struct AuthPolicyShared aps;
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SshServerConfig ssc;
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Conf *conf = make_ssh_server_conf();
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aps.ssh1keys = NULL;
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aps.ssh2keys = NULL;
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memset(&ssc, 0, sizeof(ssc));
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ssc.session_starting_dir = getenv("HOME");
|
|
ssc.ssh1_cipher_mask = SSH1_SUPPORTED_CIPHER_MASK;
|
|
ssc.ssh1_allow_compression = true;
|
|
|
|
if (argc <= 1) {
|
|
/*
|
|
* We're going to terminate with an error message below,
|
|
* because there are no host keys. But we'll display the help
|
|
* as additional standard-error output, if nothing else so
|
|
* that people see the giant safety warning.
|
|
*/
|
|
show_help(stderr);
|
|
fputc('\n', stderr);
|
|
}
|
|
|
|
while (--argc > 0) {
|
|
const char *arg = *++argv;
|
|
const char *val;
|
|
|
|
if (!strcmp(arg, "--help")) {
|
|
show_help(stdout);
|
|
exit(0);
|
|
} else if (longoptnoarg(arg, "--version")) {
|
|
show_version_and_exit();
|
|
} else if (longoptnoarg(arg, "--verbose") || !strcmp(arg, "-v")) {
|
|
verbose = true;
|
|
} else if (longoptarg(arg, "--listen", &val, &argc, &argv)) {
|
|
if (val[0] == '/') {
|
|
listen_port = -1;
|
|
listen_socket = val;
|
|
} else {
|
|
listen_port = atoi(val);
|
|
listen_socket = NULL;
|
|
}
|
|
} else if (!strcmp(arg, "--listen-once")) {
|
|
listen_once = true;
|
|
} else if (longoptarg(arg, "--hostkey", &val, &argc, &argv)) {
|
|
Filename *keyfile;
|
|
int keytype;
|
|
const char *error;
|
|
|
|
keyfile = filename_from_str(val);
|
|
keytype = key_type(keyfile);
|
|
|
|
if (keytype == SSH_KEYTYPE_SSH2) {
|
|
ssh2_userkey *uk;
|
|
ssh_key *key;
|
|
uk = ppk_load_f(keyfile, NULL, &error);
|
|
filename_free(keyfile);
|
|
if (!uk || !uk->key) {
|
|
fprintf(stderr, "%s: unable to load host key '%s': "
|
|
"%s\n", appname, val, error);
|
|
exit(1);
|
|
}
|
|
char *invalid = ssh_key_invalid(uk->key, 0);
|
|
if (invalid) {
|
|
fprintf(stderr, "%s: host key '%s' is unusable: "
|
|
"%s\n", appname, val, invalid);
|
|
exit(1);
|
|
}
|
|
key = uk->key;
|
|
sfree(uk->comment);
|
|
sfree(uk);
|
|
|
|
for (int i = 0; i < nhostkeys; i++)
|
|
if (ssh_key_alg(hostkeys[i]) == ssh_key_alg(key)) {
|
|
fprintf(stderr, "%s: host key '%s' duplicates key "
|
|
"type %s\n", appname, val,
|
|
ssh_key_alg(key)->ssh_id);
|
|
exit(1);
|
|
}
|
|
|
|
sgrowarray(hostkeys, hostkeysize, nhostkeys);
|
|
hostkeys[nhostkeys++] = key;
|
|
} else if (keytype == SSH_KEYTYPE_SSH1) {
|
|
if (hostkey1) {
|
|
fprintf(stderr, "%s: host key '%s' is a redundant "
|
|
"SSH-1 host key\n", appname, val);
|
|
exit(1);
|
|
}
|
|
hostkey1 = snew(RSAKey);
|
|
if (!rsa1_load_f(keyfile, hostkey1, NULL, &error)) {
|
|
fprintf(stderr, "%s: unable to load host key '%s': "
|
|
"%s\n", appname, val, error);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "%s: '%s' is not loadable as a "
|
|
"private key (%s)", appname, val,
|
|
key_type_to_str(keytype));
|
|
exit(1);
|
|
}
|
|
} else if (longoptarg(arg, "--rsakexkey", &val, &argc, &argv)) {
|
|
Filename *keyfile;
|
|
int keytype;
|
|
const char *error;
|
|
|
|
keyfile = filename_from_str(val);
|
|
keytype = key_type(keyfile);
|
|
|
|
if (keytype != SSH_KEYTYPE_SSH1) {
|
|
fprintf(stderr, "%s: '%s' is not loadable as an SSH-1 format "
|
|
"private key (%s)", appname, val,
|
|
key_type_to_str(keytype));
|
|
exit(1);
|
|
}
|
|
|
|
if (ssc.rsa_kex_key) {
|
|
freersakey(ssc.rsa_kex_key);
|
|
} else {
|
|
ssc.rsa_kex_key = snew(RSAKey);
|
|
}
|
|
|
|
if (!rsa1_load_f(keyfile, ssc.rsa_kex_key, NULL, &error)) {
|
|
fprintf(stderr, "%s: unable to load RSA kex key '%s': "
|
|
"%s\n", appname, val, error);
|
|
exit(1);
|
|
}
|
|
|
|
ssc.rsa_kex_key->sshk.vt = &ssh_rsa;
|
|
} else if (longoptarg(arg, "--userkey", &val, &argc, &argv)) {
|
|
Filename *keyfile;
|
|
int keytype;
|
|
const char *error;
|
|
|
|
keyfile = filename_from_str(val);
|
|
keytype = key_type(keyfile);
|
|
|
|
if (keytype == SSH_KEYTYPE_SSH2_PUBLIC_RFC4716 ||
|
|
keytype == SSH_KEYTYPE_SSH2_PUBLIC_OPENSSH) {
|
|
strbuf *sb = strbuf_new();
|
|
struct AuthPolicy_ssh2_pubkey *node;
|
|
void *blob;
|
|
|
|
if (!ppk_loadpub_f(keyfile, NULL, BinarySink_UPCAST(sb),
|
|
NULL, &error)) {
|
|
fprintf(stderr, "%s: unable to load user key '%s': "
|
|
"%s\n", appname, val, error);
|
|
exit(1);
|
|
}
|
|
|
|
node = snew_plus(struct AuthPolicy_ssh2_pubkey, sb->len);
|
|
blob = snew_plus_get_aux(node);
|
|
memcpy(blob, sb->u, sb->len);
|
|
node->public_blob = make_ptrlen(blob, sb->len);
|
|
|
|
node->next = aps.ssh2keys;
|
|
aps.ssh2keys = node;
|
|
|
|
strbuf_free(sb);
|
|
} else if (keytype == SSH_KEYTYPE_SSH1_PUBLIC) {
|
|
strbuf *sb = strbuf_new();
|
|
BinarySource src[1];
|
|
struct AuthPolicy_ssh1_pubkey *node;
|
|
|
|
if (!rsa1_loadpub_f(keyfile, BinarySink_UPCAST(sb),
|
|
NULL, &error)) {
|
|
fprintf(stderr, "%s: unable to load user key '%s': "
|
|
"%s\n", appname, val, error);
|
|
exit(1);
|
|
}
|
|
|
|
node = snew(struct AuthPolicy_ssh1_pubkey);
|
|
BinarySource_BARE_INIT(src, sb->u, sb->len);
|
|
get_rsa_ssh1_pub(src, &node->key, RSA_SSH1_EXPONENT_FIRST);
|
|
|
|
node->next = aps.ssh1keys;
|
|
aps.ssh1keys = node;
|
|
|
|
strbuf_free(sb);
|
|
} else {
|
|
fprintf(stderr, "%s: '%s' is not loadable as a public key "
|
|
"(%s)\n", appname, val, key_type_to_str(keytype));
|
|
exit(1);
|
|
}
|
|
} else if (longoptarg(arg, "--bannerfile", &val, &argc, &argv)) {
|
|
FILE *fp = fopen(val, "r");
|
|
if (!fp) {
|
|
fprintf(stderr, "%s: %s: open: %s\n", appname,
|
|
val, strerror(errno));
|
|
exit(1);
|
|
}
|
|
strbuf *sb = strbuf_new();
|
|
if (!read_file_into(BinarySink_UPCAST(sb), fp)) {
|
|
fprintf(stderr, "%s: %s: read: %s\n", appname,
|
|
val, strerror(errno));
|
|
exit(1);
|
|
}
|
|
fclose(fp);
|
|
ssc.banner = ptrlen_from_strbuf(sb);
|
|
} else if (longoptarg(arg, "--bannertext", &val, &argc, &argv)) {
|
|
ssc.banner = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--sessiondir", &val, &argc, &argv)) {
|
|
ssc.session_starting_dir = val;
|
|
} else if (longoptarg(arg, "--kexinit-kex", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_KEX] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-hostkey", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_HOSTKEY] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-cscipher", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_CSCIPHER] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-csmac", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_CSMAC] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-cscomp", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_CSCOMP] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-sccipher", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_SCCIPHER] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-scmac", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_SCMAC] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--kexinit-sccomp", &val, &argc, &argv)) {
|
|
ssc.kex_override[KEXLIST_SCCOMP] = ptrlen_from_asciz(val);
|
|
} else if (longoptarg(arg, "--ssh1-ciphers", &val, &argc, &argv)) {
|
|
ptrlen list = ptrlen_from_asciz(val);
|
|
ptrlen word;
|
|
unsigned long mask = 0;
|
|
while (word = ptrlen_get_word(&list, ","), word.len != 0) {
|
|
|
|
#define SSH1_CIPHER_CASE(bitpos, name) \
|
|
if (ptrlen_eq_string(word, name)) { \
|
|
mask |= 1U << bitpos; \
|
|
continue; \
|
|
}
|
|
SSH1_SUPPORTED_CIPHER_LIST(SSH1_CIPHER_CASE);
|
|
#undef SSH1_CIPHER_CASE
|
|
|
|
fprintf(stderr, "%s: unrecognised SSH-1 cipher '%.*s'\n",
|
|
appname, PTRLEN_PRINTF(word));
|
|
exit(1);
|
|
}
|
|
ssc.ssh1_cipher_mask = mask;
|
|
} else if (longoptnoarg(arg, "--ssh1-no-compression")) {
|
|
ssc.ssh1_allow_compression = false;
|
|
} else if (longoptnoarg(arg, "--exitsignum")) {
|
|
ssc.exit_signal_numeric = true;
|
|
} else if (longoptarg(arg, "--sshlog", &val, &argc, &argv) ||
|
|
longoptarg(arg, "-sshlog", &val, &argc, &argv)) {
|
|
Filename *logfile = filename_from_str(val);
|
|
conf_set_filename(conf, CONF_logfilename, logfile);
|
|
filename_free(logfile);
|
|
conf_set_int(conf, CONF_logtype, LGTYP_PACKETS);
|
|
conf_set_int(conf, CONF_logxfovr, LGXF_OVR);
|
|
} else if (longoptarg(arg, "--sshrawlog", &val, &argc, &argv) ||
|
|
longoptarg(arg, "-sshrawlog", &val, &argc, &argv)) {
|
|
Filename *logfile = filename_from_str(val);
|
|
conf_set_filename(conf, CONF_logfilename, logfile);
|
|
filename_free(logfile);
|
|
conf_set_int(conf, CONF_logtype, LGTYP_SSHRAW);
|
|
conf_set_int(conf, CONF_logxfovr, LGXF_OVR);
|
|
} else {
|
|
fprintf(stderr, "%s: unrecognised option '%s'\n", appname, arg);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (nhostkeys == 0 && !hostkey1) {
|
|
fprintf(stderr, "%s: specify at least one host key\n", appname);
|
|
exit(1);
|
|
}
|
|
|
|
random_ref();
|
|
|
|
/*
|
|
* Block SIGPIPE, so that we'll get EPIPE individually on
|
|
* particular network connections that go wrong.
|
|
*/
|
|
putty_signal(SIGPIPE, SIG_IGN);
|
|
|
|
sk_init();
|
|
uxsel_init();
|
|
|
|
struct server_config scfg;
|
|
scfg.conf = conf;
|
|
scfg.ssc = &ssc;
|
|
scfg.hostkeys = hostkeys;
|
|
scfg.nhostkeys = nhostkeys;
|
|
scfg.hostkey1 = hostkey1;
|
|
scfg.ap_shared = &aps;
|
|
scfg.next_id = 0;
|
|
|
|
if (listen_port >= 0 || listen_socket) {
|
|
listening = true;
|
|
scfg.listening_plug.vt = &server_plugvt;
|
|
char *msg;
|
|
if (listen_port >= 0) {
|
|
scfg.listening_socket = sk_newlistener(
|
|
NULL, listen_port, &scfg.listening_plug, true,
|
|
ADDRTYPE_UNSPEC);
|
|
msg = dupprintf("%s: listening on port %d",
|
|
appname, listen_port);
|
|
} else {
|
|
SockAddr *addr = unix_sock_addr(listen_socket);
|
|
scfg.listening_socket = new_unix_listener(
|
|
addr, &scfg.listening_plug);
|
|
msg = dupprintf("%s: listening on Unix socket %s",
|
|
appname, listen_socket);
|
|
}
|
|
|
|
log_to_stderr(-1, msg);
|
|
sfree(msg);
|
|
} else {
|
|
struct server_instance *inst;
|
|
Plug *plug = server_conn_plug(&scfg, &inst);
|
|
ssh_server_start(plug, make_fd_socket(0, 1, -1, plug));
|
|
log_to_stderr(inst->id, "speaking SSH on stdio");
|
|
}
|
|
|
|
cli_main_loop(cliloop_no_pw_setup, cliloop_no_pw_check,
|
|
cliloop_always_continue, NULL);
|
|
|
|
return 0;
|
|
}
|