| 1 |
|
/* SPDX-License-Identifier: GPL-3.0-or-later */ |
| 2 |
|
/* |
| 3 |
|
* test_ssh_server |
| 4 |
|
* - tester for network server with SSH support |
| 5 |
|
* |
| 6 |
|
* Copyright (C) 2004-2025 Leaflet <leaflet@leafok.com> |
| 7 |
|
*/ |
| 8 |
|
|
| 9 |
|
// This test was written based on libssh example/proxy.c |
| 10 |
|
|
| 11 |
|
#ifdef HAVE_CONFIG_H |
| 12 |
|
#include "config.h" |
| 13 |
|
#endif |
| 14 |
|
|
| 15 |
#include "log.h" |
#include "log.h" |
| 16 |
#include <stdio.h> |
#include <stdio.h> |
| 17 |
|
#include <libssh/callbacks.h> |
| 18 |
#include <libssh/libssh.h> |
#include <libssh/libssh.h> |
| 19 |
#include <libssh/server.h> |
#include <libssh/server.h> |
|
#include <libssh/callbacks.h> |
|
| 20 |
|
|
| 21 |
#ifndef BUF_SIZE |
enum test_ssh_server_constant_t |
| 22 |
#define BUF_SIZE 2048 |
{ |
| 23 |
#endif |
BUF_SIZE = 2048, |
| 24 |
|
}; |
| 25 |
|
|
| 26 |
#define SSH_HOST_RSA_KEYFILE "../conf/ssh_host_rsa_key" |
static const char SSH_HOST_RSA_KEY_FILE[] = "../conf/ssh_host_rsa_key"; |
| 27 |
|
static const char SSH_HOST_ED25519_KEY_FILE[] = "../conf/ssh_host_ed25519_key"; |
| 28 |
|
static const char SSH_HOST_ECDSA_KEY_FILE[] = "../conf/ssh_host_ecdsa_key"; |
| 29 |
|
|
| 30 |
#define USER "test" |
static const char USER[] = "test"; |
| 31 |
#define PASSWORD "123456" |
static const char PASSWORD[] = "123456"; |
| 32 |
|
|
| 33 |
static ssh_channel SSH_channel; |
static ssh_channel SSH_channel; |
| 34 |
static int authenticated = 0; |
static int authenticated = 0; |
| 40 |
{ |
{ |
| 41 |
(void)userdata; |
(void)userdata; |
| 42 |
|
|
| 43 |
log_common("Authenticating user %s pwd %s\n", user, password); |
log_common("Authenticating user %s pwd %s", user, password); |
| 44 |
if (strcmp(user, USER) == 0 && strcmp(password, PASSWORD) == 0) |
if (strcmp(user, USER) == 0 && strcmp(password, PASSWORD) == 0) |
| 45 |
{ |
{ |
| 46 |
authenticated = 1; |
authenticated = 1; |
| 47 |
log_common("Authenticated\n"); |
log_common("Authenticated"); |
| 48 |
return SSH_AUTH_SUCCESS; |
return SSH_AUTH_SUCCESS; |
| 49 |
} |
} |
| 50 |
if (tries >= 3) |
if (tries >= 3) |
| 51 |
{ |
{ |
| 52 |
log_error("Too many authentication tries\n"); |
log_error("Too many authentication tries"); |
| 53 |
ssh_disconnect(session); |
ssh_disconnect(session); |
| 54 |
error = 1; |
error = 1; |
| 55 |
return SSH_AUTH_DENIED; |
return SSH_AUTH_DENIED; |
| 69 |
(void)px; |
(void)px; |
| 70 |
(void)py; |
(void)py; |
| 71 |
(void)userdata; |
(void)userdata; |
| 72 |
log_common("Allocated terminal\n"); |
log_common("Allocated terminal"); |
| 73 |
return 0; |
return 0; |
| 74 |
} |
} |
| 75 |
|
|
| 78 |
(void)session; |
(void)session; |
| 79 |
(void)channel; |
(void)channel; |
| 80 |
(void)userdata; |
(void)userdata; |
| 81 |
log_common("Allocated shell\n"); |
log_common("Allocated shell"); |
| 82 |
return 0; |
return 0; |
| 83 |
} |
} |
| 84 |
|
|
| 86 |
.channel_pty_request_function = pty_request, |
.channel_pty_request_function = pty_request, |
| 87 |
.channel_shell_request_function = shell_request}; |
.channel_shell_request_function = shell_request}; |
| 88 |
|
|
| 89 |
static ssh_channel new_session_channel(ssh_session session, void *userdata) |
static ssh_channel channel_open(ssh_session session, void *userdata) |
| 90 |
{ |
{ |
| 91 |
(void)session; |
(void)session; |
| 92 |
(void)userdata; |
(void)userdata; |
| 94 |
if (SSH_channel != NULL) |
if (SSH_channel != NULL) |
| 95 |
return NULL; |
return NULL; |
| 96 |
|
|
| 97 |
log_common("Allocated session channel\n"); |
log_common("Allocated session channel"); |
| 98 |
SSH_channel = ssh_channel_new(session); |
SSH_channel = ssh_channel_new(session); |
| 99 |
ssh_callbacks_init(&channel_cb); |
ssh_callbacks_init(&channel_cb); |
| 100 |
ssh_set_channel_callbacks(SSH_channel, &channel_cb); |
ssh_set_channel_callbacks(SSH_channel, &channel_cb); |
| 111 |
struct ssh_server_callbacks_struct cb = { |
struct ssh_server_callbacks_struct cb = { |
| 112 |
.userdata = NULL, |
.userdata = NULL, |
| 113 |
.auth_password_function = auth_password, |
.auth_password_function = auth_password, |
| 114 |
.channel_open_request_session_function = new_session_channel}; |
.channel_open_request_session_function = channel_open}; |
| 115 |
|
|
| 116 |
|
long int ssh_timeout = 0; |
| 117 |
|
|
| 118 |
char buf[BUF_SIZE]; |
char buf[BUF_SIZE]; |
| 119 |
char host[128] = ""; |
char host[128] = ""; |
| 120 |
int i, r; |
int i, r; |
| 121 |
|
|
| 122 |
|
int ssh_key_valid = 0; |
| 123 |
int ssh_log_level = SSH_LOG_PROTOCOL; |
int ssh_log_level = SSH_LOG_PROTOCOL; |
| 124 |
|
|
| 125 |
ssh_init(); |
ssh_init(); |
| 126 |
|
|
| 127 |
sshbind = ssh_bind_new(); |
sshbind = ssh_bind_new(); |
| 128 |
|
|
| 129 |
|
if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_RSA_KEY_FILE) < 0) |
| 130 |
|
{ |
| 131 |
|
log_error("Error loading SSH RSA key: %s", SSH_HOST_RSA_KEY_FILE); |
| 132 |
|
} |
| 133 |
|
else |
| 134 |
|
{ |
| 135 |
|
ssh_key_valid = 1; |
| 136 |
|
} |
| 137 |
|
if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_ED25519_KEY_FILE) < 0) |
| 138 |
|
{ |
| 139 |
|
log_error("Error loading SSH ED25519 key: %s", SSH_HOST_ED25519_KEY_FILE); |
| 140 |
|
} |
| 141 |
|
else |
| 142 |
|
{ |
| 143 |
|
ssh_key_valid = 1; |
| 144 |
|
} |
| 145 |
|
if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_ECDSA_KEY_FILE) < 0) |
| 146 |
|
{ |
| 147 |
|
log_error("Error loading SSH ECDSA key: %s", SSH_HOST_ECDSA_KEY_FILE); |
| 148 |
|
} |
| 149 |
|
else |
| 150 |
|
{ |
| 151 |
|
ssh_key_valid = 1; |
| 152 |
|
} |
| 153 |
|
|
| 154 |
|
if (!ssh_key_valid) |
| 155 |
|
{ |
| 156 |
|
log_error("Error: no valid SSH host key"); |
| 157 |
|
ssh_bind_free(sshbind); |
| 158 |
|
return -1; |
| 159 |
|
} |
| 160 |
|
|
| 161 |
if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, hostaddr) < 0 || |
if (ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDADDR, hostaddr) < 0 || |
| 162 |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT, &port) < 0 || |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_BINDPORT, &port) < 0 || |
| 163 |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY, SSH_HOST_RSA_KEYFILE) < 0 || |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS, "+ssh-ed25519,ecdsa-sha2-nistp256,ssh-rsa") < 0 || |
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS, "ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_PUBKEY_ACCEPTED_KEY_TYPES, "ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_KEY_EXCHANGE, "curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HMAC_C_S, "umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HMAC_S_C, "umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_CIPHERS_C_S, "chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com") < 0 || |
|
|
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_CIPHERS_S_C, "chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com") < 0 || |
|
| 164 |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0) |
ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_LOG_VERBOSITY, &ssh_log_level) < 0) |
| 165 |
{ |
{ |
| 166 |
log_error("Error setting SSH bind options: %s\n", ssh_get_error(sshbind)); |
log_error("Error setting SSH bind options: %s", ssh_get_error(sshbind)); |
| 167 |
ssh_bind_free(sshbind); |
ssh_bind_free(sshbind); |
| 168 |
return -1; |
return -1; |
| 169 |
} |
} |
| 170 |
|
|
| 171 |
if (ssh_bind_listen(sshbind) < 0) |
if (ssh_bind_listen(sshbind) < 0) |
| 172 |
{ |
{ |
| 173 |
log_error("Error listening at SSH server port: %s\n", ssh_get_error(sshbind)); |
log_error("Error listening at SSH server port: %s", ssh_get_error(sshbind)); |
| 174 |
ssh_bind_free(sshbind); |
ssh_bind_free(sshbind); |
| 175 |
return -1; |
return -1; |
| 176 |
} |
} |
| 190 |
ssh_callbacks_init(&cb); |
ssh_callbacks_init(&cb); |
| 191 |
ssh_set_server_callbacks(session, &cb); |
ssh_set_server_callbacks(session, &cb); |
| 192 |
|
|
| 193 |
|
ssh_timeout = 60; // second |
| 194 |
|
if (ssh_options_set(session, SSH_OPTIONS_TIMEOUT, &ssh_timeout) < 0) |
| 195 |
|
{ |
| 196 |
|
log_error("Error setting SSH options: %s", ssh_get_error(session)); |
| 197 |
|
ssh_disconnect(session); |
| 198 |
|
_exit(1); |
| 199 |
|
} |
| 200 |
|
|
| 201 |
if (ssh_handle_key_exchange(session)) |
if (ssh_handle_key_exchange(session)) |
| 202 |
{ |
{ |
| 203 |
log_error("ssh_handle_key_exchange: %s\n", ssh_get_error(session)); |
log_error("ssh_handle_key_exchange: %s", ssh_get_error(session)); |
| 204 |
return 1; |
ssh_disconnect(session); |
| 205 |
|
_exit(1); |
| 206 |
} |
} |
| 207 |
ssh_set_auth_methods(session, SSH_AUTH_METHOD_PASSWORD | SSH_AUTH_METHOD_GSSAPI_MIC); |
ssh_set_auth_methods(session, SSH_AUTH_METHOD_PASSWORD | SSH_AUTH_METHOD_GSSAPI_MIC); |
| 208 |
|
|
| 216 |
r = ssh_event_dopoll(event, -1); |
r = ssh_event_dopoll(event, -1); |
| 217 |
if (r == SSH_ERROR) |
if (r == SSH_ERROR) |
| 218 |
{ |
{ |
| 219 |
log_error("Error : %s\n", ssh_get_error(session)); |
log_error("Error : %s", ssh_get_error(session)); |
| 220 |
ssh_disconnect(session); |
ssh_disconnect(session); |
| 221 |
_exit(1); |
_exit(1); |
| 222 |
} |
} |
| 224 |
|
|
| 225 |
if (error) |
if (error) |
| 226 |
{ |
{ |
| 227 |
log_error("Error, exiting loop\n"); |
log_error("Error, exiting loop"); |
| 228 |
_exit(1); |
_exit(1); |
| 229 |
} |
} |
| 230 |
else |
else |
| 231 |
{ |
{ |
| 232 |
log_common("Authenticated and got a channel\n"); |
log_common("Authenticated and got a channel"); |
| 233 |
|
} |
| 234 |
|
|
| 235 |
|
ssh_timeout = 0; |
| 236 |
|
if (ssh_options_set(session, SSH_OPTIONS_TIMEOUT, &ssh_timeout) < 0) |
| 237 |
|
{ |
| 238 |
|
log_error("Error setting SSH options: %s", ssh_get_error(session)); |
| 239 |
|
ssh_disconnect(session); |
| 240 |
|
_exit(1); |
| 241 |
} |
} |
| 242 |
|
|
| 243 |
snprintf(buf, sizeof(buf), "Hello, welcome to the Sample SSH proxy.\r\nPlease select your destination: "); |
snprintf(buf, sizeof(buf), "Hello, welcome to the Sample SSH proxy.\r\nPlease select your destination: "); |
| 261 |
} |
} |
| 262 |
else |
else |
| 263 |
{ |
{ |
| 264 |
log_error("Error: %s\n", ssh_get_error(session)); |
log_error("Error: %s", ssh_get_error(session)); |
| 265 |
_exit(1); |
_exit(1); |
| 266 |
} |
} |
| 267 |
} while (i > 0); |
} while (i > 0); |
| 274 |
|
|
| 275 |
_exit(0); |
_exit(0); |
| 276 |
case -1: |
case -1: |
| 277 |
log_error("Failed to fork\n"); |
log_error("Failed to fork"); |
| 278 |
break; |
break; |
| 279 |
} |
} |
| 280 |
} |
} |
| 281 |
else |
else |
| 282 |
{ |
{ |
| 283 |
log_error("%s\n", ssh_get_error(sshbind)); |
log_error("%s", ssh_get_error(sshbind)); |
| 284 |
} |
} |
| 285 |
|
|
| 286 |
/* Since the session has been passed to a child fork, do some cleaning |
/* Since the session has been passed to a child fork, do some cleaning |