]> andersk Git - openssh.git/blobdiff - servconf.c
- jakob@cvs.openbsd.org 2003/05/15 01:48:10
[openssh.git] / servconf.c
index 72d75cc9866e7abc8919d56abdfcd1c11099a9de..5076c5df6d4cc79384eda1bdcbb76e2ede3c3091 100644 (file)
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: servconf.c,v 1.103 2002/03/18 23:52:51 stevesk Exp $");
+RCSID("$OpenBSD: servconf.c,v 1.119 2003/05/15 01:48:10 jakob Exp $");
 
-#if defined(KRB4) || defined(KRB5)
+#if defined(KRB4)
 #include <krb.h>
 #endif
+
+#if defined(KRB5)
+# ifdef HEIMDAL
+#  include <krb.h>
+# else
+/*
+ * XXX: Bodge - but then, so is using the kerberos IV KEYFILE to get a 
+ * Kerberos V keytab
+ */
+#  define KEYFILE "/etc/krb5.keytab"
+# endif
+#endif
+
 #ifdef AFS
 #include <kafs.h>
 #endif
@@ -47,7 +60,7 @@ initialize_server_options(ServerOptions *options)
        memset(options, 0, sizeof(*options));
 
        /* Portable-specific options */
-       options->pam_authentication_via_kbd_int = -1;
+       options->use_pam = -1;
 
        /* Standard Options */
        options->num_ports = 0;
@@ -77,22 +90,18 @@ initialize_server_options(ServerOptions *options)
        options->hostbased_uses_name_from_packet_only = -1;
        options->rsa_authentication = -1;
        options->pubkey_authentication = -1;
-#if defined(KRB4) || defined(KRB5)
        options->kerberos_authentication = -1;
        options->kerberos_or_local_passwd = -1;
        options->kerberos_ticket_cleanup = -1;
-#endif
-#if defined(AFS) || defined(KRB5)
        options->kerberos_tgt_passing = -1;
-#endif
-#ifdef AFS
        options->afs_token_passing = -1;
-#endif
        options->password_authentication = -1;
        options->kbd_interactive_authentication = -1;
        options->challenge_response_authentication = -1;
        options->permit_empty_passwd = -1;
+       options->permit_user_env = -1;
        options->use_login = -1;
+       options->compression = -1;
        options->allow_tcp_forwarding = -1;
        options->num_allow_users = 0;
        options->num_deny_users = 0;
@@ -113,10 +122,6 @@ initialize_server_options(ServerOptions *options)
        options->authorized_keys_file = NULL;
        options->authorized_keys_file2 = NULL;
 
-       options->unprivileged_user = -1;
-       options->unprivileged_group = -1;
-       options->unprivileged_dir = NULL;
-
        /* Needs to be accessable in many places */
        use_privsep = -1;
 }
@@ -125,8 +130,8 @@ void
 fill_default_server_options(ServerOptions *options)
 {
        /* Portable-specific options */
-       if (options->pam_authentication_via_kbd_int == -1)
-               options->pam_authentication_via_kbd_int = 0;
+       if (options->use_pam == -1)
+               options->use_pam = 0;
 
        /* Standard Options */
        if (options->protocol == SSH_PROTO_UNKNOWN)
@@ -152,7 +157,7 @@ fill_default_server_options(ServerOptions *options)
        if (options->server_key_bits == -1)
                options->server_key_bits = 768;
        if (options->login_grace_time == -1)
-               options->login_grace_time = 600;
+               options->login_grace_time = 120;
        if (options->key_regeneration_time == -1)
                options->key_regeneration_time = 3600;
        if (options->permit_root_login == PERMIT_NOT_SET)
@@ -193,22 +198,16 @@ fill_default_server_options(ServerOptions *options)
                options->rsa_authentication = 1;
        if (options->pubkey_authentication == -1)
                options->pubkey_authentication = 1;
-#if defined(KRB4) || defined(KRB5)
        if (options->kerberos_authentication == -1)
-               options->kerberos_authentication = (access(KEYFILE, R_OK) == 0);
+               options->kerberos_authentication = 0;
        if (options->kerberos_or_local_passwd == -1)
                options->kerberos_or_local_passwd = 1;
        if (options->kerberos_ticket_cleanup == -1)
                options->kerberos_ticket_cleanup = 1;
-#endif
-#if defined(AFS) || defined(KRB5)
        if (options->kerberos_tgt_passing == -1)
                options->kerberos_tgt_passing = 0;
-#endif
-#ifdef AFS
        if (options->afs_token_passing == -1)
-               options->afs_token_passing = k_hasafs();
-#endif
+               options->afs_token_passing = 0;
        if (options->password_authentication == -1)
                options->password_authentication = 1;
        if (options->kbd_interactive_authentication == -1)
@@ -217,8 +216,12 @@ fill_default_server_options(ServerOptions *options)
                options->challenge_response_authentication = 1;
        if (options->permit_empty_passwd == -1)
                options->permit_empty_passwd = 0;
+       if (options->permit_user_env == -1)
+               options->permit_user_env = 0;
        if (options->use_login == -1)
                options->use_login = 0;
+       if (options->compression == -1)
+               options->compression = 1;
        if (options->allow_tcp_forwarding == -1)
                options->allow_tcp_forwarding = 1;
        if (options->gateway_ports == -1)
@@ -245,48 +248,44 @@ fill_default_server_options(ServerOptions *options)
        if (options->authorized_keys_file == NULL)
                options->authorized_keys_file = _PATH_SSH_USER_PERMITTED_KEYS;
 
-       /* Turn privilege separation _off_ by default */
+       /* Turn privilege separation on by default */
        if (use_privsep == -1)
-               use_privsep = 0;
-       if (options->unprivileged_user == -1)
-               options->unprivileged_user = 32767;
-       if (options->unprivileged_group == -1)
-               options->unprivileged_group = 32767;
-       if (options->unprivileged_dir == NULL)
-               options->unprivileged_dir = "/var/empty";
+               use_privsep = 1;
+
+#ifndef HAVE_MMAP
+       if (use_privsep && options->compression == 1) {
+               error("This platform does not support both privilege "
+                   "separation and compression");
+               error("Compression disabled");
+               options->compression = 0;
+       }
+#endif
+
 }
 
 /* Keyword tokens. */
 typedef enum {
        sBadOption,             /* == unknown option */
        /* Portable-specific options */
-       sPAMAuthenticationViaKbdInt,
+       sUsePAM,
        /* Standard Options */
        sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime,
        sPermitRootLogin, sLogFacility, sLogLevel,
        sRhostsAuthentication, sRhostsRSAAuthentication, sRSAAuthentication,
-#if defined(KRB4) || defined(KRB5)
        sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
-#endif
-#if defined(AFS) || defined(KRB5)
-       sKerberosTgtPassing,
-#endif
-#ifdef AFS
-       sAFSTokenPassing,
-#endif
-       sChallengeResponseAuthentication,
+       sKerberosTgtPassing, sAFSTokenPassing, sChallengeResponseAuthentication,
        sPasswordAuthentication, sKbdInteractiveAuthentication, sListenAddress,
        sPrintMotd, sPrintLastLog, sIgnoreRhosts,
        sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
        sStrictModes, sEmptyPasswd, sKeepAlives,
-       sUseLogin, sAllowTcpForwarding,
+       sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
        sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
        sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
        sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, sMaxStartups,
        sBanner, sVerifyReverseMapping, sHostbasedAuthentication,
        sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
        sClientAliveCountMax, sAuthorizedKeysFile, sAuthorizedKeysFile2,
-       sUsePrivilegeSeparation, sUnprivUser, sUnprivGroup, sUnprivDir,
+       sUsePrivilegeSeparation,
        sDeprecated
 } ServerOpCodes;
 
@@ -296,7 +295,7 @@ static struct {
        ServerOpCodes opcode;
 } keywords[] = {
        /* Portable-specific options */
-       { "PAMAuthenticationViaKbdInt", sPAMAuthenticationViaKbdInt },
+       { "UsePAM", sUsePAM },
        /* Standard Options */
        { "port", sPort },
        { "hostkey", sHostKeyFile },
@@ -315,17 +314,11 @@ static struct {
        { "rsaauthentication", sRSAAuthentication },
        { "pubkeyauthentication", sPubkeyAuthentication },
        { "dsaauthentication", sPubkeyAuthentication },                 /* alias */
-#if defined(KRB4) || defined(KRB5)
        { "kerberosauthentication", sKerberosAuthentication },
        { "kerberosorlocalpasswd", sKerberosOrLocalPasswd },
        { "kerberosticketcleanup", sKerberosTicketCleanup },
-#endif
-#if defined(AFS) || defined(KRB5)
        { "kerberostgtpassing", sKerberosTgtPassing },
-#endif
-#ifdef AFS
        { "afstokenpassing", sAFSTokenPassing },
-#endif
        { "passwordauthentication", sPasswordAuthentication },
        { "kbdinteractiveauthentication", sKbdInteractiveAuthentication },
        { "challengeresponseauthentication", sChallengeResponseAuthentication },
@@ -342,7 +335,9 @@ static struct {
        { "xauthlocation", sXAuthLocation },
        { "strictmodes", sStrictModes },
        { "permitemptypasswords", sEmptyPasswd },
+       { "permituserenvironment", sPermitUserEnvironment },
        { "uselogin", sUseLogin },
+       { "compression", sCompression },
        { "keepalive", sKeepAlives },
        { "allowtcpforwarding", sAllowTcpForwarding },
        { "allowusers", sAllowUsers },
@@ -363,9 +358,6 @@ static struct {
        { "authorizedkeysfile", sAuthorizedKeysFile },
        { "authorizedkeysfile2", sAuthorizedKeysFile2 },
        { "useprivilegeseparation", sUsePrivilegeSeparation},
-       { "unprivuser", sUnprivUser},
-       { "unprivgroup", sUnprivGroup},
-       { "unprivdir", sUnprivDir},
        { NULL, sBadOption }
 };
 
@@ -413,7 +405,7 @@ add_one_listen_addr(ServerOptions *options, char *addr, u_short port)
        hints.ai_family = IPv4or6;
        hints.ai_socktype = SOCK_STREAM;
        hints.ai_flags = (addr == NULL) ? AI_PASSIVE : 0;
-       snprintf(strport, sizeof strport, "%d", port);
+       snprintf(strport, sizeof strport, "%u", port);
        if ((gaierr = getaddrinfo(addr, strport, &hints, &aitop)) != 0)
                fatal("bad addr or host: %s (%s)",
                    addr ? addr : "<NULL>",
@@ -429,9 +421,8 @@ process_server_config_line(ServerOptions *options, char *line,
     const char *filename, int linenum)
 {
        char *cp, **charptr, *arg, *p;
-       int *intptr, value;
+       int *intptr, value, i, n;
        ServerOpCodes opcode;
-       int i, n;
 
        cp = line;
        arg = strdelim(&cp);
@@ -445,8 +436,8 @@ process_server_config_line(ServerOptions *options, char *line,
        opcode = parse_token(arg, filename, linenum);
        switch (opcode) {
        /* Portable-specific options */
-       case sPAMAuthenticationViaKbdInt:
-               intptr = &options->pam_authentication_via_kbd_int;
+       case sUsePAM:
+               intptr = &options->use_pam;
                goto parse_flag;
 
        /* Standard Options */
@@ -632,7 +623,7 @@ parse_flag:
        case sPubkeyAuthentication:
                intptr = &options->pubkey_authentication;
                goto parse_flag;
-#if defined(KRB4) || defined(KRB5)
+
        case sKerberosAuthentication:
                intptr = &options->kerberos_authentication;
                goto parse_flag;
@@ -644,17 +635,14 @@ parse_flag:
        case sKerberosTicketCleanup:
                intptr = &options->kerberos_ticket_cleanup;
                goto parse_flag;
-#endif
-#if defined(AFS) || defined(KRB5)
+
        case sKerberosTgtPassing:
                intptr = &options->kerberos_tgt_passing;
                goto parse_flag;
-#endif
-#ifdef AFS
+
        case sAFSTokenPassing:
                intptr = &options->afs_token_passing;
                goto parse_flag;
-#endif
 
        case sPasswordAuthentication:
                intptr = &options->password_authentication;
@@ -704,10 +692,18 @@ parse_flag:
                intptr = &options->permit_empty_passwd;
                goto parse_flag;
 
+       case sPermitUserEnvironment:
+               intptr = &options->permit_user_env;
+               goto parse_flag;
+
        case sUseLogin:
                intptr = &options->use_login;
                goto parse_flag;
 
+       case sCompression:
+               intptr = &options->compression;
+               goto parse_flag;
+
        case sGatewayPorts:
                intptr = &options->gateway_ports;
                goto parse_flag;
@@ -746,24 +742,13 @@ parse_flag:
                intptr = &use_privsep;
                goto parse_flag;
 
-       case sUnprivUser:
-               intptr = &options->unprivileged_user;
-               goto parse_int;
-
-       case sUnprivGroup:
-               intptr = &options->unprivileged_group;
-               goto parse_int;
-
-       case sUnprivDir:
-               charptr = &options->unprivileged_dir;
-               goto parse_filename;
-
        case sAllowUsers:
                while ((arg = strdelim(&cp)) && *arg != '\0') {
                        if (options->num_allow_users >= MAX_ALLOW_USERS)
                                fatal("%s line %d: too many allow users.",
                                    filename, linenum);
-                       options->allow_users[options->num_allow_users++] = xstrdup(arg);
+                       options->allow_users[options->num_allow_users++] =
+                           xstrdup(arg);
                }
                break;
 
@@ -772,7 +757,8 @@ parse_flag:
                        if (options->num_deny_users >= MAX_DENY_USERS)
                                fatal( "%s line %d: too many deny users.",
                                    filename, linenum);
-                       options->deny_users[options->num_deny_users++] = xstrdup(arg);
+                       options->deny_users[options->num_deny_users++] =
+                           xstrdup(arg);
                }
                break;
 
@@ -781,7 +767,8 @@ parse_flag:
                        if (options->num_allow_groups >= MAX_ALLOW_GROUPS)
                                fatal("%s line %d: too many allow groups.",
                                    filename, linenum);
-                       options->allow_groups[options->num_allow_groups++] = xstrdup(arg);
+                       options->allow_groups[options->num_allow_groups++] =
+                           xstrdup(arg);
                }
                break;
 
@@ -898,7 +885,7 @@ parse_flag:
                goto parse_int;
 
        case sDeprecated:
-               log("%s line %d: Deprecated option %s",
+               logit("%s line %d: Deprecated option %s",
                    filename, linenum, arg);
                while (arg)
                    arg = strdelim(&cp);
@@ -919,11 +906,11 @@ parse_flag:
 void
 read_server_config(ServerOptions *options, const char *filename)
 {
-       FILE *f;
+       int linenum, bad_options = 0;
        char line[1024];
-       int linenum;
-       int bad_options = 0;
+       FILE *f;
 
+       debug2("read_server_config: filename %s", filename);
        f = fopen(filename, "r");
        if (!f) {
                perror(filename);
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