version 1.53.2.3, 2001/03/21 19:46:28 |
version 1.53.2.4, 2001/05/07 21:09:33 |
|
|
#include "kex.h" |
#include "kex.h" |
#include "mac.h" |
#include "mac.h" |
|
|
/* add listen address */ |
void add_listen_addr(ServerOptions *options, char *addr, u_short port); |
void add_listen_addr(ServerOptions *options, char *addr); |
void add_one_listen_addr(ServerOptions *options, char *addr, u_short port); |
|
|
/* AF_UNSPEC or AF_INET or AF_INET6 */ |
/* AF_UNSPEC or AF_INET or AF_INET6 */ |
extern int IPv4or6; |
extern int IPv4or6; |
|
|
options->ignore_rhosts = -1; |
options->ignore_rhosts = -1; |
options->ignore_user_known_hosts = -1; |
options->ignore_user_known_hosts = -1; |
options->print_motd = -1; |
options->print_motd = -1; |
|
options->print_lastlog = -1; |
options->check_mail = -1; |
options->check_mail = -1; |
options->x11_forwarding = -1; |
options->x11_forwarding = -1; |
options->x11_display_offset = -1; |
options->x11_display_offset = -1; |
|
|
options->log_level = (LogLevel) - 1; |
options->log_level = (LogLevel) - 1; |
options->rhosts_authentication = -1; |
options->rhosts_authentication = -1; |
options->rhosts_rsa_authentication = -1; |
options->rhosts_rsa_authentication = -1; |
|
options->hostbased_authentication = -1; |
|
options->hostbased_uses_name_from_packet_only = -1; |
options->rsa_authentication = -1; |
options->rsa_authentication = -1; |
options->pubkey_authentication = -1; |
options->pubkey_authentication = -1; |
#ifdef KRB4 |
#ifdef KRB4 |
|
|
options->max_startups = -1; |
options->max_startups = -1; |
options->banner = NULL; |
options->banner = NULL; |
options->reverse_mapping_check = -1; |
options->reverse_mapping_check = -1; |
|
options->client_alive_interval = -1; |
|
options->client_alive_count_max = -1; |
} |
} |
|
|
void |
void |
|
|
if (options->num_ports == 0) |
if (options->num_ports == 0) |
options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
if (options->listen_addrs == NULL) |
if (options->listen_addrs == NULL) |
add_listen_addr(options, NULL); |
add_listen_addr(options, NULL, 0); |
if (options->pid_file == NULL) |
if (options->pid_file == NULL) |
options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
options->pid_file = _PATH_SSH_DAEMON_PID_FILE; |
if (options->server_key_bits == -1) |
if (options->server_key_bits == -1) |
|
|
options->check_mail = 0; |
options->check_mail = 0; |
if (options->print_motd == -1) |
if (options->print_motd == -1) |
options->print_motd = 1; |
options->print_motd = 1; |
|
if (options->print_lastlog == -1) |
|
options->print_lastlog = 1; |
if (options->x11_forwarding == -1) |
if (options->x11_forwarding == -1) |
options->x11_forwarding = 0; |
options->x11_forwarding = 0; |
if (options->x11_display_offset == -1) |
if (options->x11_display_offset == -1) |
|
|
options->rhosts_authentication = 0; |
options->rhosts_authentication = 0; |
if (options->rhosts_rsa_authentication == -1) |
if (options->rhosts_rsa_authentication == -1) |
options->rhosts_rsa_authentication = 0; |
options->rhosts_rsa_authentication = 0; |
|
if (options->hostbased_authentication == -1) |
|
options->hostbased_authentication = 0; |
|
if (options->hostbased_uses_name_from_packet_only == -1) |
|
options->hostbased_uses_name_from_packet_only = 0; |
if (options->rsa_authentication == -1) |
if (options->rsa_authentication == -1) |
options->rsa_authentication = 1; |
options->rsa_authentication = 1; |
if (options->pubkey_authentication == -1) |
if (options->pubkey_authentication == -1) |
|
|
options->max_startups_begin = options->max_startups; |
options->max_startups_begin = options->max_startups; |
if (options->reverse_mapping_check == -1) |
if (options->reverse_mapping_check == -1) |
options->reverse_mapping_check = 0; |
options->reverse_mapping_check = 0; |
|
if (options->client_alive_interval == -1) |
|
options->client_alive_interval = 0; |
|
if (options->client_alive_count_max == -1) |
|
options->client_alive_count_max = 3; |
} |
} |
|
|
/* Keyword tokens. */ |
/* Keyword tokens. */ |
|
|
#endif |
#endif |
sChallengeResponseAuthentication, |
sChallengeResponseAuthentication, |
sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress, |
sPrintMotd, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, |
sPrintMotd, sPrintLastLog, sIgnoreRhosts, |
|
sX11Forwarding, sX11DisplayOffset, |
sStrictModes, sEmptyPasswd, sKeepAlives, sCheckMail, |
sStrictModes, sEmptyPasswd, sKeepAlives, sCheckMail, |
sUseLogin, sAllowTcpForwarding, |
sUseLogin, sAllowTcpForwarding, |
sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, |
sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, |
sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups, |
sBanner, sReverseMappingCheck |
sBanner, sReverseMappingCheck, sHostbasedAuthentication, |
|
sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, |
|
sClientAliveCountMax |
} ServerOpCodes; |
} ServerOpCodes; |
|
|
/* Textual representation of the tokens. */ |
/* Textual representation of the tokens. */ |
|
|
{ "loglevel", sLogLevel }, |
{ "loglevel", sLogLevel }, |
{ "rhostsauthentication", sRhostsAuthentication }, |
{ "rhostsauthentication", sRhostsAuthentication }, |
{ "rhostsrsaauthentication", sRhostsRSAAuthentication }, |
{ "rhostsrsaauthentication", sRhostsRSAAuthentication }, |
|
{ "hostbasedauthentication", sHostbasedAuthentication }, |
|
{ "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly }, |
{ "rsaauthentication", sRSAAuthentication }, |
{ "rsaauthentication", sRSAAuthentication }, |
{ "pubkeyauthentication", sPubkeyAuthentication }, |
{ "pubkeyauthentication", sPubkeyAuthentication }, |
{ "dsaauthentication", sPubkeyAuthentication }, /* alias */ |
{ "dsaauthentication", sPubkeyAuthentication }, /* alias */ |
|
|
{ "checkmail", sCheckMail }, |
{ "checkmail", sCheckMail }, |
{ "listenaddress", sListenAddress }, |
{ "listenaddress", sListenAddress }, |
{ "printmotd", sPrintMotd }, |
{ "printmotd", sPrintMotd }, |
|
{ "printlastlog", sPrintLastLog }, |
{ "ignorerhosts", sIgnoreRhosts }, |
{ "ignorerhosts", sIgnoreRhosts }, |
{ "ignoreuserknownhosts", sIgnoreUserKnownHosts }, |
{ "ignoreuserknownhosts", sIgnoreUserKnownHosts }, |
{ "x11forwarding", sX11Forwarding }, |
{ "x11forwarding", sX11Forwarding }, |
|
|
{ "maxstartups", sMaxStartups }, |
{ "maxstartups", sMaxStartups }, |
{ "banner", sBanner }, |
{ "banner", sBanner }, |
{ "reversemappingcheck", sReverseMappingCheck }, |
{ "reversemappingcheck", sReverseMappingCheck }, |
|
{ "clientaliveinterval", sClientAliveInterval }, |
|
{ "clientalivecountmax", sClientAliveCountMax }, |
{ NULL, 0 } |
{ NULL, 0 } |
}; |
}; |
|
|
/* |
/* |
* Returns the number of the token pointed to by cp of length len. Never |
* Returns the number of the token pointed to by cp or sBadOption. |
* returns if the token is not known. |
|
*/ |
*/ |
|
|
static ServerOpCodes |
static ServerOpCodes |
|
|
if (strcasecmp(cp, keywords[i].name) == 0) |
if (strcasecmp(cp, keywords[i].name) == 0) |
return keywords[i].opcode; |
return keywords[i].opcode; |
|
|
fprintf(stderr, "%s: line %d: Bad configuration option: %s\n", |
error("%s: line %d: Bad configuration option: %s", |
filename, linenum, cp); |
filename, linenum, cp); |
return sBadOption; |
return sBadOption; |
} |
} |
|
|
/* |
|
* add listen address |
|
*/ |
|
void |
void |
add_listen_addr(ServerOptions *options, char *addr) |
add_listen_addr(ServerOptions *options, char *addr, u_short port) |
{ |
{ |
struct addrinfo hints, *ai, *aitop; |
|
char strport[NI_MAXSERV]; |
|
int gaierr; |
|
int i; |
int i; |
|
|
if (options->num_ports == 0) |
if (options->num_ports == 0) |
options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
options->ports[options->num_ports++] = SSH_DEFAULT_PORT; |
for (i = 0; i < options->num_ports; i++) { |
if (port == 0) |
memset(&hints, 0, sizeof(hints)); |
for (i = 0; i < options->num_ports; i++) |
hints.ai_family = IPv4or6; |
add_one_listen_addr(options, addr, options->ports[i]); |
hints.ai_socktype = SOCK_STREAM; |
else |
hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; |
add_one_listen_addr(options, addr, port); |
snprintf(strport, sizeof strport, "%d", options->ports[i]); |
|
if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
|
fatal("bad addr or host: %s (%s)", |
|
addr ? addr : "<NULL>", |
|
gai_strerror(gaierr)); |
|
for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
|
; |
|
ai->ai_next = options->listen_addrs; |
|
options->listen_addrs = aitop; |
|
} |
|
} |
} |
|
|
|
void |
|
add_one_listen_addr(ServerOptions *options, char *addr, u_short port) |
|
{ |
|
struct addrinfo hints, *ai, *aitop; |
|
char strport[NI_MAXSERV]; |
|
int gaierr; |
|
|
|
memset(&hints, 0, sizeof(hints)); |
|
hints.ai_family = IPv4or6; |
|
hints.ai_socktype = SOCK_STREAM; |
|
hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0; |
|
snprintf(strport, sizeof strport, "%d", port); |
|
if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0) |
|
fatal("bad addr or host: %s (%s)", |
|
addr ? addr : "<NULL>", |
|
gai_strerror(gaierr)); |
|
for (ai = aitop; ai->ai_next; ai = ai->ai_next) |
|
; |
|
ai->ai_next = options->listen_addrs; |
|
options->listen_addrs = aitop; |
|
} |
|
|
/* Reads the server configuration file. */ |
/* Reads the server configuration file. */ |
|
|
void |
void |
|
|
{ |
{ |
FILE *f; |
FILE *f; |
char line[1024]; |
char line[1024]; |
char *cp, **charptr, *arg; |
char *cp, **charptr, *arg, *p; |
int linenum, *intptr, value; |
int linenum, *intptr, value; |
int bad_options = 0; |
int bad_options = 0; |
ServerOpCodes opcode; |
ServerOpCodes opcode; |
|
|
if (!arg || *arg == '\0') |
if (!arg || *arg == '\0') |
fatal("%s line %d: missing port number.", |
fatal("%s line %d: missing port number.", |
filename, linenum); |
filename, linenum); |
options->ports[options->num_ports++] = atoi(arg); |
options->ports[options->num_ports++] = a2port(arg); |
|
if (options->ports[options->num_ports-1] == 0) |
|
fatal("%s line %d: Badly formatted port number.", |
|
filename, linenum); |
break; |
break; |
|
|
case sServerKeyBits: |
case sServerKeyBits: |
intptr = &options->server_key_bits; |
intptr = &options->server_key_bits; |
parse_int: |
parse_int: |
arg = strdelim(&cp); |
arg = strdelim(&cp); |
if (!arg || *arg == '\0') { |
if (!arg || *arg == '\0') |
fprintf(stderr, "%s line %d: missing integer value.\n", |
fatal("%s line %d: missing integer value.", |
filename, linenum); |
filename, linenum); |
exit(1); |
|
} |
|
value = atoi(arg); |
value = atoi(arg); |
if (*intptr == -1) |
if (*intptr == -1) |
*intptr = value; |
*intptr = value; |
|
|
|
|
case sListenAddress: |
case sListenAddress: |
arg = strdelim(&cp); |
arg = strdelim(&cp); |
if (!arg || *arg == '\0') |
if (!arg || *arg == '\0' || strncmp(arg, "[]", 2) == 0) |
fatal("%s line %d: missing inet addr.", |
fatal("%s line %d: missing inet addr.", |
filename, linenum); |
filename, linenum); |
add_listen_addr(options, arg); |
if (*arg == '[') { |
|
if ((p = strchr(arg, ']')) == NULL) |
|
fatal("%s line %d: bad ipv6 inet addr usage.", |
|
filename, linenum); |
|
arg++; |
|
memmove(p, p+1, strlen(p+1)+1); |
|
} else if (((p = strchr(arg, ':')) == NULL) || |
|
(strchr(p+1, ':') != NULL)) { |
|
add_listen_addr(options, arg, 0); |
|
break; |
|
} |
|
if (*p == ':') { |
|
u_short port; |
|
|
|
p++; |
|
if (*p == '\0') |
|
fatal("%s line %d: bad inet addr:port usage.", |
|
filename, linenum); |
|
else { |
|
*(p-1) = '\0'; |
|
if ((port = a2port(p)) == 0) |
|
fatal("%s line %d: bad port number.", |
|
filename, linenum); |
|
add_listen_addr(options, arg, port); |
|
} |
|
} else if (*p == '\0') |
|
add_listen_addr(options, arg, 0); |
|
else |
|
fatal("%s line %d: bad inet addr usage.", |
|
filename, linenum); |
break; |
break; |
|
|
case sHostKeyFile: |
case sHostKeyFile: |
intptr = &options->num_host_key_files; |
intptr = &options->num_host_key_files; |
if (*intptr >= MAX_HOSTKEYS) { |
if (*intptr >= MAX_HOSTKEYS) |
fprintf(stderr, |
fatal("%s line %d: too many host keys specified (max %d).", |
"%s line %d: too many host keys specified (max %d).\n", |
|
filename, linenum, MAX_HOSTKEYS); |
filename, linenum, MAX_HOSTKEYS); |
exit(1); |
|
} |
|
charptr = &options->host_key_files[*intptr]; |
charptr = &options->host_key_files[*intptr]; |
parse_filename: |
parse_filename: |
arg = strdelim(&cp); |
arg = strdelim(&cp); |
if (!arg || *arg == '\0') { |
if (!arg || *arg == '\0') |
fprintf(stderr, "%s line %d: missing file name.\n", |
fatal("%s line %d: missing file name.", |
filename, linenum); |
filename, linenum); |
exit(1); |
|
} |
|
if (*charptr == NULL) { |
if (*charptr == NULL) { |
*charptr = tilde_expand_filename(arg, getuid()); |
*charptr = tilde_expand_filename(arg, getuid()); |
/* increase optional counter */ |
/* increase optional counter */ |
|
|
case sPermitRootLogin: |
case sPermitRootLogin: |
intptr = &options->permit_root_login; |
intptr = &options->permit_root_login; |
arg = strdelim(&cp); |
arg = strdelim(&cp); |
if (!arg || *arg == '\0') { |
if (!arg || *arg == '\0') |
fprintf(stderr, "%s line %d: missing yes/" |
fatal("%s line %d: missing yes/" |
"without-password/forced-commands-only/no " |
"without-password/forced-commands-only/no " |
"argument.\n", filename, linenum); |
"argument.", filename, linenum); |
exit(1); |
value = 0; /* silence compiler */ |
} |
|
if (strcmp(arg, "without-password") == 0) |
if (strcmp(arg, "without-password") == 0) |
value = PERMIT_NO_PASSWD; |
value = PERMIT_NO_PASSWD; |
else if (strcmp(arg, "forced-commands-only") == 0) |
else if (strcmp(arg, "forced-commands-only") == 0) |
|
|
value = PERMIT_YES; |
value = PERMIT_YES; |
else if (strcmp(arg, "no") == 0) |
else if (strcmp(arg, "no") == 0) |
value = PERMIT_NO; |
value = PERMIT_NO; |
else { |
else |
fprintf(stderr, "%s line %d: Bad yes/" |
fatal("%s line %d: Bad yes/" |
"without-password/forced-commands-only/no " |
"without-password/forced-commands-only/no " |
"argument: %s\n", filename, linenum, arg); |
"argument: %s", filename, linenum, arg); |
exit(1); |
|
} |
|
if (*intptr == -1) |
if (*intptr == -1) |
*intptr = value; |
*intptr = value; |
break; |
break; |
|
|
intptr = &options->ignore_rhosts; |
intptr = &options->ignore_rhosts; |
parse_flag: |
parse_flag: |
arg = strdelim(&cp); |
arg = strdelim(&cp); |
if (!arg || *arg == '\0') { |
if (!arg || *arg == '\0') |
fprintf(stderr, "%s line %d: missing yes/no argument.\n", |
fatal("%s line %d: missing yes/no argument.", |
filename, linenum); |
filename, linenum); |
exit(1); |
value = 0; /* silence compiler */ |
} |
|
if (strcmp(arg, "yes") == 0) |
if (strcmp(arg, "yes") == 0) |
value = 1; |
value = 1; |
else if (strcmp(arg, "no") == 0) |
else if (strcmp(arg, "no") == 0) |
value = 0; |
value = 0; |
else { |
else |
fprintf(stderr, "%s line %d: Bad yes/no argument: %s\n", |
fatal("%s line %d: Bad yes/no argument: %s", |
filename, linenum, arg); |
filename, linenum, arg); |
exit(1); |
|
} |
|
if (*intptr == -1) |
if (*intptr == -1) |
*intptr = value; |
*intptr = value; |
break; |
break; |
|
|
intptr = &options->rhosts_rsa_authentication; |
intptr = &options->rhosts_rsa_authentication; |
goto parse_flag; |
goto parse_flag; |
|
|
|
case sHostbasedAuthentication: |
|
intptr = &options->hostbased_authentication; |
|
goto parse_flag; |
|
|
|
case sHostbasedUsesNameFromPacketOnly: |
|
intptr = &options->hostbased_uses_name_from_packet_only; |
|
goto parse_flag; |
|
|
case sRSAAuthentication: |
case sRSAAuthentication: |
intptr = &options->rsa_authentication; |
intptr = &options->rsa_authentication; |
goto parse_flag; |
goto parse_flag; |
|
|
intptr = &options->print_motd; |
intptr = &options->print_motd; |
goto parse_flag; |
goto parse_flag; |
|
|
|
case sPrintLastLog: |
|
intptr = &options->print_lastlog; |
|
goto parse_flag; |
|
|
case sX11Forwarding: |
case sX11Forwarding: |
intptr = &options->x11_forwarding; |
intptr = &options->x11_forwarding; |
goto parse_flag; |
goto parse_flag; |
|
|
case sBanner: |
case sBanner: |
charptr = &options->banner; |
charptr = &options->banner; |
goto parse_filename; |
goto parse_filename; |
|
case sClientAliveInterval: |
|
intptr = &options->client_alive_interval; |
|
goto parse_int; |
|
case sClientAliveCountMax: |
|
intptr = &options->client_alive_count_max; |
|
goto parse_int; |
default: |
default: |
fprintf(stderr, "%s line %d: Missing handler for opcode %s (%d)\n", |
fatal("%s line %d: Missing handler for opcode %s (%d)", |
filename, linenum, arg, opcode); |
filename, linenum, arg, opcode); |
exit(1); |
|
} |
} |
if ((arg = strdelim(&cp)) != NULL && *arg != '\0') { |
if ((arg = strdelim(&cp)) != NULL && *arg != '\0') |
fprintf(stderr, |
fatal("%s line %d: garbage at end of line; \"%.200s\".", |
"%s line %d: garbage at end of line; \"%.200s\".\n", |
filename, linenum, arg); |
filename, linenum, arg); |
|
exit(1); |
|
} |
|
} |
} |
fclose(f); |
fclose(f); |
if (bad_options > 0) { |
if (bad_options > 0) |
fprintf(stderr, "%s: terminating, %d bad configuration options\n", |
fatal("%s: terminating, %d bad configuration options", |
filename, bad_options); |
filename, bad_options); |
exit(1); |
|
} |
|
} |
} |