X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=pppd%2Fauth.c;h=601241f18164a576f01496755b7725a9c6e6fb24;hb=e87fe1bbd37a1486c5223f110e9ce3ef75971f93;hp=3641b6ea701f11af845331926d308c366103a4d5;hpb=ad3937a0a38a696eb1a37dbf8f92e8e6072cdccb;p=ppp.git diff --git a/pppd/auth.c b/pppd/auth.c index 3641b6e..601241f 100644 --- a/pppd/auth.c +++ b/pppd/auth.c @@ -78,6 +78,7 @@ #include #include #include +#include #include #include #include @@ -113,6 +114,9 @@ #include "upap.h" #include "chap-new.h" #include "eap.h" +#ifdef USE_EAPTLS +#include "eap-tls.h" +#endif #ifdef CBCP_SUPPORT #include "cbcp.h" #endif @@ -186,6 +190,11 @@ int (*chap_check_hook) __P((void)) = NULL; /* Hook for a plugin to get the CHAP password for authenticating us */ int (*chap_passwd_hook) __P((char *user, char *passwd)) = NULL; +#ifdef USE_EAPTLS +/* Hook for a plugin to get the EAP-TLS password for authenticating us */ +int (*eaptls_passwd_hook) __P((char *user, char *passwd)) = NULL; +#endif + /* Hook for a plugin to say whether it is OK if the peer refuses to authenticate. */ int (*null_auth_hook) __P((struct wordlist **paddrs, @@ -241,6 +250,16 @@ bool explicit_remote = 0; /* User specified explicit remote name */ bool explicit_user = 0; /* Set if "user" option supplied */ bool explicit_passwd = 0; /* Set if "password" option supplied */ char remote_name[MAXNAMELEN]; /* Peer's name for authentication */ +#ifdef USE_EAPTLS +char *cacert_file = NULL; /* CA certificate file (pem format) */ +char *ca_path = NULL; /* directory with CA certificates */ +char *cert_file = NULL; /* client certificate file (pem format) */ +char *privkey_file = NULL; /* client private key file (pem format) */ +char *crl_dir = NULL; /* directory containing CRL files */ +char *crl_file = NULL; /* Certificate Revocation List (CRL) file (pem format) */ +char *max_tls_version = NULL; /* Maximum TLS protocol version (default=1.2) */ +bool need_peer_eap = 0; /* Require peer to authenticate us */ +#endif static char *uafname; /* name of most recent +ua file */ @@ -257,6 +276,19 @@ static int have_pap_secret __P((int *)); static int have_chap_secret __P((char *, char *, int, int *)); static int have_srp_secret __P((char *client, char *server, int need_ip, int *lacks_ipp)); + +#ifdef USE_EAPTLS +static int have_eaptls_secret_server +__P((char *client, char *server, int need_ip, int *lacks_ipp)); +static int have_eaptls_secret_client __P((char *client, char *server)); +static int scan_authfile_eaptls __P((FILE * f, char *client, char *server, + char *cli_cert, char *serv_cert, + char *ca_cert, char *pk, + struct wordlist ** addrs, + struct wordlist ** opts, + char *filename, int flags)); +#endif + static int ip_addr_check __P((u_int32_t, struct permitted_ip *)); static int scan_authfile __P((FILE *, char *, char *, char *, struct wordlist **, struct wordlist **, @@ -404,6 +436,18 @@ option_t auth_options[] = { "Set telephone number(s) which are allowed to connect", OPT_PRIV | OPT_A2LIST }, +#ifdef USE_EAPTLS + { "ca", o_string, &cacert_file, "EAP-TLS CA certificate in PEM format" }, + { "capath", o_string, &ca_path, "EAP-TLS CA certificate directory" }, + { "cert", o_string, &cert_file, "EAP-TLS client certificate in PEM format" }, + { "key", o_string, &privkey_file, "EAP-TLS client private key in PEM format" }, + { "crl-dir", o_string, &crl_dir, "Use CRLs in directory" }, + { "crl", o_string, &crl_file, "Use specific CRL file" }, + { "max-tls-version", o_string, &max_tls_version, + "Maximum TLS version (1.0/1.1/1.2 (default)/1.3)" }, + { "need-peer-eap", o_bool, &need_peer_eap, + "Require the peer to authenticate us", 1 }, +#endif /* USE_EAPTLS */ { NULL } }; @@ -737,6 +781,9 @@ link_established(unit) lcp_options *wo = &lcp_wantoptions[unit]; lcp_options *go = &lcp_gotoptions[unit]; lcp_options *ho = &lcp_hisoptions[unit]; +#ifdef USE_EAPTLS + lcp_options *ao = &lcp_allowoptions[unit]; +#endif int i; struct protent *protp; @@ -771,6 +818,22 @@ link_established(unit) } } +#ifdef USE_EAPTLS + if (need_peer_eap && !ao->neg_eap) { + warn("eap required to authenticate us but no suitable secrets"); + lcp_close(unit, "couldn't negotiate eap"); + status = EXIT_AUTH_TOPEER_FAILED; + return; + } + + if (need_peer_eap && !ho->neg_eap) { + warn("peer doesn't want to authenticate us with eap"); + lcp_close(unit, "couldn't negotiate eap"); + status = EXIT_PEER_AUTH_FAILED; + return; + } +#endif + new_phase(PHASE_AUTHENTICATE); auth = 0; if (go->neg_eap) { @@ -1291,6 +1354,15 @@ auth_check_options() our_name, 1, &lacks_ip); } +#ifdef USE_EAPTLS + if (!can_auth && wo->neg_eap) { + can_auth = + have_eaptls_secret_server((explicit_remote ? remote_name : + NULL), our_name, 1, &lacks_ip); + + } +#endif + if (auth_required && !can_auth && noauth_addrs == NULL) { if (default_auth) { option_error( @@ -1345,7 +1417,11 @@ auth_reset(unit) passwd[0] != 0 || (hadchap == 1 || (hadchap == -1 && have_chap_secret(user, (explicit_remote? remote_name: NULL), 0, NULL))) || - have_srp_secret(user, (explicit_remote? remote_name: NULL), 0, NULL)); + have_srp_secret(user, (explicit_remote? remote_name: NULL), 0, NULL) +#ifdef USE_EAPTLS + || have_eaptls_secret_client(user, (explicit_remote? remote_name: NULL)) +#endif + ); hadchap = -1; if (go->neg_upap && !uselogin && !have_pap_secret(NULL)) @@ -1360,7 +1436,12 @@ auth_reset(unit) !have_chap_secret((explicit_remote? remote_name: NULL), our_name, 1, NULL))) && !have_srp_secret((explicit_remote? remote_name: NULL), our_name, 1, - NULL)) + NULL) +#ifdef USE_EAPTLS + && !have_eaptls_secret_server((explicit_remote? remote_name: NULL), + our_name, 1, NULL) +#endif + ) go->neg_eap = 0; } @@ -2373,3 +2454,344 @@ auth_script(script) auth_script_pid = run_program(script, argv, 0, auth_script_done, NULL, 0); } + + +#ifdef USE_EAPTLS +static int +have_eaptls_secret_server(client, server, need_ip, lacks_ipp) + char *client; + char *server; + int need_ip; + int *lacks_ipp; +{ + FILE *f; + int ret; + char *filename; + struct wordlist *addrs; + char servcertfile[MAXWORDLEN]; + char clicertfile[MAXWORDLEN]; + char cacertfile[MAXWORDLEN]; + char pkfile[MAXWORDLEN]; + + filename = _PATH_EAPTLSSERVFILE; + f = fopen(filename, "r"); + if (f == NULL) + return 0; + + if (client != NULL && client[0] == 0) + client = NULL; + else if (server != NULL && server[0] == 0) + server = NULL; + + ret = + scan_authfile_eaptls(f, client, server, clicertfile, servcertfile, + cacertfile, pkfile, &addrs, NULL, filename, + 0); + + fclose(f); + +/* + if (ret >= 0 && !eaptls_init_ssl(1, cacertfile, servcertfile, + clicertfile, pkfile)) + ret = -1; +*/ + + if (ret >= 0 && need_ip && !some_ip_ok(addrs)) { + if (lacks_ipp != 0) + *lacks_ipp = 1; + ret = -1; + } + if (addrs != 0) + free_wordlist(addrs); + + return ret >= 0; +} + + +static int +have_eaptls_secret_client(client, server) + char *client; + char *server; +{ + FILE *f; + int ret; + char *filename; + struct wordlist *addrs = NULL; + char servcertfile[MAXWORDLEN]; + char clicertfile[MAXWORDLEN]; + char cacertfile[MAXWORDLEN]; + char pkfile[MAXWORDLEN]; + + if (client != NULL && client[0] == 0) + client = NULL; + else if (server != NULL && server[0] == 0) + server = NULL; + + if ((cacert_file || ca_path) && cert_file && privkey_file) + return 1; + + filename = _PATH_EAPTLSCLIFILE; + f = fopen(filename, "r"); + if (f == NULL) + return 0; + + ret = + scan_authfile_eaptls(f, client, server, clicertfile, servcertfile, + cacertfile, pkfile, &addrs, NULL, filename, + 0); + fclose(f); + +/* + if (ret >= 0 && !eaptls_init_ssl(0, cacertfile, clicertfile, + servcertfile, pkfile)) + ret = -1; +*/ + + if (addrs != 0) + free_wordlist(addrs); + + return ret >= 0; +} + + +static int +scan_authfile_eaptls(f, client, server, cli_cert, serv_cert, ca_cert, pk, + addrs, opts, filename, flags) + FILE *f; + char *client; + char *server; + char *cli_cert; + char *serv_cert; + char *ca_cert; + char *pk; + struct wordlist **addrs; + struct wordlist **opts; + char *filename; + int flags; +{ + int newline; + int got_flag, best_flag; + struct wordlist *ap, *addr_list, *alist, **app; + char word[MAXWORDLEN]; + + if (addrs != NULL) + *addrs = NULL; + if (opts != NULL) + *opts = NULL; + addr_list = NULL; + if (!getword(f, word, &newline, filename)) + return -1; /* file is empty??? */ + newline = 1; + best_flag = -1; + for (;;) { + /* + * Skip until we find a word at the start of a line. + */ + while (!newline && getword(f, word, &newline, filename)); + if (!newline) + break; /* got to end of file */ + + /* + * Got a client - check if it's a match or a wildcard. + */ + got_flag = 0; + if (client != NULL && strcmp(word, client) != 0 && !ISWILD(word)) { + newline = 0; + continue; + } + if (!ISWILD(word)) + got_flag = NONWILD_CLIENT; + + /* + * Now get a server and check if it matches. + */ + if (!getword(f, word, &newline, filename)) + break; + if (newline) + continue; + if (!ISWILD(word)) { + if (server != NULL && strcmp(word, server) != 0) + continue; + got_flag |= NONWILD_SERVER; + } + + /* + * Got some sort of a match - see if it's better than what + * we have already. + */ + if (got_flag <= best_flag) + continue; + + /* + * Get the cli_cert + */ + if (!getword(f, word, &newline, filename)) + break; + if (newline) + continue; + if (strcmp(word, "-") != 0) { + strlcpy(cli_cert, word, MAXWORDLEN); + } else + cli_cert[0] = 0; + + /* + * Get serv_cert + */ + if (!getword(f, word, &newline, filename)) + break; + if (newline) + continue; + if (strcmp(word, "-") != 0) { + strlcpy(serv_cert, word, MAXWORDLEN); + } else + serv_cert[0] = 0; + + /* + * Get ca_cert + */ + if (!getword(f, word, &newline, filename)) + break; + if (newline) + continue; + strlcpy(ca_cert, word, MAXWORDLEN); + + /* + * Get pk + */ + if (!getword(f, word, &newline, filename)) + break; + if (newline) + continue; + strlcpy(pk, word, MAXWORDLEN); + + + /* + * Now read address authorization info and make a wordlist. + */ + app = &alist; + for (;;) { + if (!getword(f, word, &newline, filename) || newline) + break; + ap = (struct wordlist *) + malloc(sizeof(struct wordlist) + strlen(word) + 1); + if (ap == NULL) + novm("authorized addresses"); + ap->word = (char *) (ap + 1); + strcpy(ap->word, word); + *app = ap; + app = &ap->next; + } + *app = NULL; + /* + * This is the best so far; remember it. + */ + best_flag = got_flag; + if (addr_list) + free_wordlist(addr_list); + addr_list = alist; + + if (!newline) + break; + } + + /* scan for a -- word indicating the start of options */ + for (app = &addr_list; (ap = *app) != NULL; app = &ap->next) + if (strcmp(ap->word, "--") == 0) + break; + /* ap = start of options */ + if (ap != NULL) { + ap = ap->next; /* first option */ + free(*app); /* free the "--" word */ + *app = NULL; /* terminate addr list */ + } + if (opts != NULL) + *opts = ap; + else if (ap != NULL) + free_wordlist(ap); + if (addrs != NULL) + *addrs = addr_list; + else if (addr_list != NULL) + free_wordlist(addr_list); + + return best_flag; +} + + +int +get_eaptls_secret(unit, client, server, clicertfile, servcertfile, + cacertfile, capath, pkfile, am_server) + int unit; + char *client; + char *server; + char *clicertfile; + char *servcertfile; + char *cacertfile; + char *capath; + char *pkfile; + int am_server; +{ + FILE *fp; + int ret; + char *filename = NULL; + struct wordlist *addrs = NULL; + struct wordlist *opts = NULL; + + /* maybe overkill, but it eases debugging */ + bzero(clicertfile, MAXWORDLEN); + bzero(servcertfile, MAXWORDLEN); + bzero(cacertfile, MAXWORDLEN); + bzero(capath, MAXWORDLEN); + bzero(pkfile, MAXWORDLEN); + + /* the ca+cert+privkey can also be specified as options */ + if (!am_server && (cacert_file || ca_path) && cert_file && privkey_file ) + { + strlcpy( clicertfile, cert_file, MAXWORDLEN ); + if (cacert_file) + strlcpy( cacertfile, cacert_file, MAXWORDLEN ); + if (ca_path) + strlcpy( capath, ca_path, MAXWORDLEN ); + strlcpy( pkfile, privkey_file, MAXWORDLEN ); + } + else + { + filename = (am_server ? _PATH_EAPTLSSERVFILE : _PATH_EAPTLSCLIFILE); + addrs = NULL; + + fp = fopen(filename, "r"); + if (fp == NULL) + { + error("Can't open eap-tls secret file %s: %m", filename); + return 0; + } + + check_access(fp, filename); + + ret = scan_authfile_eaptls(fp, client, server, clicertfile, servcertfile, + cacertfile, pkfile, &addrs, &opts, filename, 0); + + fclose(fp); + + if (ret < 0) return 0; + } + + if (eaptls_passwd_hook) + { + dbglog( "Calling eaptls password hook" ); + if ( (*eaptls_passwd_hook)(pkfile, passwd) < 0) + { + error("Unable to obtain EAP-TLS password for %s (%s) from plugin", + client, pkfile); + return 0; + } + } + if (am_server) + set_allowed_addrs(unit, addrs, opts); + else if (opts != NULL) + free_wordlist(opts); + if (addrs != NULL) + free_wordlist(addrs); + + return 1; +} +#endif