/* * Copyright (C) 1996-2017 The Squid Software Foundation and contributors * * Squid software is distributed under GPLv2+ license and includes * contributions from numerous individuals and organizations. * Please see the COPYING and CONTRIBUTORS files for details. */ /* * ----------------------------------------------------------------------------- * * Author: Markus Moeller (markus_moeller at compuserve.com) * * Copyright (C) 2007 Markus Moeller. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. * * As a special exemption, M Moeller gives permission to link this program * with MIT, Heimdal or other GSS/Kerberos libraries, and distribute * the resulting executable, without including the source code for * the Libraries in the source distribution. * * ----------------------------------------------------------------------------- */ #include "squid.h" #include "rfc1738.h" #if HAVE_GSSAPI #include "negotiate_kerberos.h" #if HAVE_SYS_STAT_H #include "sys/stat.h" #endif #if HAVE_UNISTD_H #include "unistd.h" #endif #if HAVE_KRB5_MEMORY_KEYTAB typedef struct _krb5_kt_list { struct _krb5_kt_list *next; krb5_keytab_entry *entry; } *krb5_kt_list; krb5_kt_list ktlist = NULL; krb5_error_code krb5_free_kt_list(krb5_context context, krb5_kt_list kt_list); krb5_error_code krb5_write_keytab(krb5_context context, krb5_kt_list kt_list, char *name); krb5_error_code krb5_read_keytab(krb5_context context, char *name, krb5_kt_list *kt_list); #endif /* HAVE_KRB5_MEMORY_KEYTAB */ int check_k5_err(krb5_context context, const char *function, krb5_error_code code) { if (code && code != KRB5_KT_END) { const char *errmsg; errmsg = krb5_get_error_message(context, code); debug((char *) "%s| %s: ERROR: %s failed: %s\n", LogTime(), PROGRAM, function, errmsg); fprintf(stderr, "%s| %s: ERROR: %s: %s\n", LogTime(), PROGRAM, function, errmsg); #if HAVE_KRB5_FREE_ERROR_MESSAGE krb5_free_error_message(context, errmsg); #elif HAVE_KRB5_FREE_ERROR_STRING krb5_free_error_string(context, (char *)errmsg); #else xfree(errmsg); #endif } return code; } char * gethost_name(void) { /* * char hostname[sysconf(_SC_HOST_NAME_MAX)]; */ char hostname[1024]; struct addrinfo *hres = NULL, *hres_list; int rc, count; rc = gethostname(hostname, sizeof(hostname)-1); if (rc) { debug((char *) "%s| %s: ERROR: resolving hostname '%s' failed\n", LogTime(), PROGRAM, hostname); fprintf(stderr, "%s| %s: ERROR: resolving hostname '%s' failed\n", LogTime(), PROGRAM, hostname); return NULL; } rc = getaddrinfo(hostname, NULL, NULL, &hres); if (rc != 0 || hres == NULL ) { debug((char *) "%s| %s: ERROR: resolving hostname with getaddrinfo: %s failed\n", LogTime(), PROGRAM, gai_strerror(rc)); fprintf(stderr, "%s| %s: ERROR: resolving hostname with getaddrinfo: %s failed\n", LogTime(), PROGRAM, gai_strerror(rc)); return NULL; } hres_list = hres; count = 0; while (hres_list) { ++count; hres_list = hres_list->ai_next; } rc = getnameinfo(hres->ai_addr, hres->ai_addrlen, hostname, sizeof(hostname), NULL, 0, 0); if (rc != 0) { debug((char *) "%s| %s: ERROR: resolving ip address with getnameinfo: %s failed\n", LogTime(), PROGRAM, gai_strerror(rc)); fprintf(stderr, "%s| %s: ERROR: resolving ip address with getnameinfo: %s failed\n", LogTime(), PROGRAM, gai_strerror(rc)); freeaddrinfo(hres); return NULL; } freeaddrinfo(hres); hostname[sizeof(hostname)-1] = '\0'; return (xstrdup(hostname)); } int check_gss_err(OM_uint32 major_status, OM_uint32 minor_status, const char *function, int log, int sout) { if (GSS_ERROR(major_status)) { OM_uint32 maj_stat, min_stat; OM_uint32 msg_ctx = 0; gss_buffer_desc status_string; char buf[1024]; size_t len; len = 0; msg_ctx = 0; do { /* convert major status code (GSS-API error) to text */ maj_stat = gss_display_status(&min_stat, major_status, GSS_C_GSS_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string); if (maj_stat == GSS_S_COMPLETE && status_string.length > 0) { if (sizeof(buf) > len + status_string.length + 1) { snprintf(buf + len, (sizeof(buf) - len), "%s", (char *) status_string.value); len += status_string.length; } } else msg_ctx = 0; gss_release_buffer(&min_stat, &status_string); } while (msg_ctx); if (sizeof(buf) > len + 2) { snprintf(buf + len, (sizeof(buf) - len), "%s", ". "); len += 2; } msg_ctx = 0; do { /* convert minor status code (underlying routine error) to text */ maj_stat = gss_display_status(&min_stat, minor_status, GSS_C_MECH_CODE, GSS_C_NULL_OID, &msg_ctx, &status_string); if (maj_stat == GSS_S_COMPLETE && status_string.length > 0) { if (sizeof(buf) > len + status_string.length) { snprintf(buf + len, (sizeof(buf) - len), "%s", (char *) status_string.value); len += status_string.length; } } else msg_ctx = 0; gss_release_buffer(&min_stat, &status_string); } while (msg_ctx); debug((char *) "%s| %s: ERROR: %s failed: %s\n", LogTime(), PROGRAM, function, buf); if (sout) fprintf(stdout, "BH %s failed: %s\n", function, buf); if (log) fprintf(stderr, "%s| %s: INFO: User not authenticated\n", LogTime(), PROGRAM); return (1); } return (0); } #if HAVE_KRB5_MEMORY_KEYTAB /* * Free a kt_list */ krb5_error_code krb5_free_kt_list(krb5_context context, krb5_kt_list list) { krb5_kt_list lp = list; while (lp) { #if USE_HEIMDAL_KRB5 || ( HAVE_KRB5_KT_FREE_ENTRY && HAVE_DECL_KRB5_KT_FREE_ENTRY ) krb5_error_code retval = krb5_kt_free_entry(context, lp->entry); #else krb5_error_code retval = krb5_free_keytab_entry_contents(context, lp->entry); #endif safe_free(lp->entry); if (check_k5_err(context, "krb5_kt_free_entry", retval)) return retval; krb5_kt_list prev = lp; lp = lp->next; xfree(prev); } return 0; } /* * Read in a keytab and append it to list. If list starts as NULL, * allocate a new one if necessary. */ krb5_error_code krb5_read_keytab(krb5_context context, char *name, krb5_kt_list *list) { krb5_kt_list lp = NULL, tail = NULL, back = NULL; krb5_keytab kt; krb5_keytab_entry *entry; krb5_kt_cursor cursor; krb5_error_code retval = 0; if (*list) { /* point lp at the tail of the list */ for (lp = *list; lp->next; lp = lp->next); back = lp; } retval = krb5_kt_resolve(context, name, &kt); if (check_k5_err(context, "krb5_kt_resolve", retval)) return retval; retval = krb5_kt_start_seq_get(context, kt, &cursor); if (check_k5_err(context, "krb5_kt_start_seq_get", retval)) goto close_kt; for (;;) { entry = (krb5_keytab_entry *)xcalloc(1, sizeof (krb5_keytab_entry)); if (!entry) { retval = ENOMEM; debug((char *) "%s| %s: ERROR: krb5_read_keytab failed: %s\n", LogTime(), PROGRAM, strerror(retval)); fprintf(stderr, "%s| %s: ERROR: krb5_read_keytab: %s\n", LogTime(), PROGRAM, strerror(retval)); break; } memset(entry, 0, sizeof (*entry)); retval = krb5_kt_next_entry(context, kt, entry, &cursor); if (check_k5_err(context, "krb5_kt_next_entry", retval)) break; if (!lp) { /* if list is empty, start one */ lp = (krb5_kt_list)xmalloc(sizeof (*lp)); if (!lp) { retval = ENOMEM; debug((char *) "%s| %s: ERROR: krb5_read_keytab failed: %s\n", LogTime(), PROGRAM, strerror(retval)); fprintf(stderr, "%s| %s: ERROR: krb5_read_keytab: %s\n", LogTime(), PROGRAM, strerror(retval)); break; } } else { lp->next = (krb5_kt_list)xmalloc(sizeof (*lp)); if (!lp->next) { retval = ENOMEM; debug((char *) "%s| %s: ERROR: krb5_read_keytab failed: %s\n", LogTime(), PROGRAM, strerror(retval)); fprintf(stderr, "%s| %s: ERROR: krb5_read_keytab: %s\n", LogTime(), PROGRAM, strerror(retval)); break; } lp = lp->next; } if (!tail) tail = lp; lp->next = NULL; lp->entry = entry; } xfree(entry); if (retval) { if (retval == KRB5_KT_END) retval = 0; else { krb5_free_kt_list(context, tail); tail = NULL; if (back) back->next = NULL; } } if (!*list) *list = tail; krb5_kt_end_seq_get(context, kt, &cursor); close_kt: krb5_kt_close(context, kt); return retval; } /* * Takes a kt_list and writes it to the named keytab. */ krb5_error_code krb5_write_keytab(krb5_context context, krb5_kt_list list, char *name) { krb5_keytab kt; char ktname[MAXPATHLEN+sizeof("MEMORY:")+1]; krb5_error_code retval = 0; snprintf(ktname, sizeof(ktname), "%s", name); retval = krb5_kt_resolve(context, ktname, &kt); if (retval) return retval; for (krb5_kt_list lp = list; lp; lp = lp->next) { retval = krb5_kt_add_entry(context, kt, lp->entry); if (retval) break; } /* * krb5_kt_close(context, kt); */ return retval; } #endif /* HAVE_KRB5_MEMORY_KEYTAB */ int main(int argc, char *const argv[]) { char buf[MAX_AUTHTOKEN_LEN]; char *c, *p; char *user = NULL; char *rfc_user = NULL; #if HAVE_PAC_SUPPORT char ad_groups[MAX_PAC_GROUP_SIZE]; char *ag=NULL; krb5_pac pac; #if USE_HEIMDAL_KRB5 gss_buffer_desc data_set = GSS_C_EMPTY_BUFFER; #else gss_buffer_desc type_id = GSS_C_EMPTY_BUFFER; #endif #endif krb5_context context = NULL; krb5_error_code ret; long length = 0; static int err = 0; int opt, log = 0, norealm = 0; OM_uint32 ret_flags = 0, spnego_flag = 0; char *service_name = (char *) "HTTP", *host_name = NULL; char *token = NULL; char *service_principal = NULL; char *keytab_name = NULL; char *keytab_name_env = NULL; char default_keytab[MAXPATHLEN]; #if HAVE_KRB5_MEMORY_KEYTAB char *memory_keytab_name = NULL; #endif char *rcache_type = NULL; char *rcache_type_env = NULL; char *rcache_dir = NULL; char *rcache_dir_env = NULL; OM_uint32 major_status, minor_status; gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT; gss_name_t client_name = GSS_C_NO_NAME; gss_name_t server_name = GSS_C_NO_NAME; gss_cred_id_t server_creds = GSS_C_NO_CREDENTIAL; gss_buffer_desc service = GSS_C_EMPTY_BUFFER; gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER; gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER; const unsigned char *kerberosToken = NULL; const unsigned char *spnegoToken = NULL; size_t spnegoTokenLength = 0; setbuf(stdout, NULL); setbuf(stdin, NULL); while (-1 != (opt = getopt(argc, argv, "dirs:k:c:t:"))) { switch (opt) { case 'd': debug_enabled = 1; break; case 'i': log = 1; break; case 'r': norealm = 1; break; case 'k': #if HAVE_SYS_STAT_H struct stat fstat; char *ktp; #endif if (optarg) keytab_name = xstrdup(optarg); else { fprintf(stderr, "ERROR: keytab file not given\n"); exit(1); } /* * Some sanity checks */ #if HAVE_SYS_STAT_H if ((ktp=strchr(keytab_name,':'))) ktp++; else ktp=keytab_name; if (stat((const char*)ktp, &fstat)) { if (ENOENT == errno) fprintf(stderr, "ERROR: keytab file %s does not exist\n",keytab_name); else fprintf(stderr, "ERROR: Error %s during stat of keytab file %s\n",strerror(errno),keytab_name); exit(1); } else if (!S_ISREG(fstat.st_mode)) { fprintf(stderr, "ERROR: keytab file %s is not a file\n",keytab_name); exit(1); } #endif #if HAVE_UNISTD_H if (access(ktp, R_OK)) { fprintf(stderr, "ERROR: keytab file %s is not accessible\n",keytab_name); exit(1); } #endif break; case 'c': #if HAVE_SYS_STAT_H struct stat dstat; #endif if (optarg) rcache_dir = xstrdup(optarg); else { fprintf(stderr, "ERROR: replay cache directory not given\n"); exit(1); } /* * Some sanity checks */ #if HAVE_SYS_STAT_H if (stat((const char*)rcache_dir, &dstat)) { if (ENOENT == errno) fprintf(stderr, "ERROR: replay cache directory %s does not exist\n",rcache_dir); else fprintf(stderr, "ERROR: Error %s during stat of replay cache directory %s\n",strerror(errno),rcache_dir); exit(1); } else if (!S_ISDIR(dstat.st_mode)) { fprintf(stderr, "ERROR: replay cache directory %s is not a directory\n",rcache_dir); exit(1); } #endif #if HAVE_UNISTD_H if (access(rcache_dir, W_OK)) { fprintf(stderr, "ERROR: replay cache directory %s is not accessible\n",rcache_dir); exit(1); } #endif break; case 't': if (optarg) rcache_type = xstrdup(optarg); else { fprintf(stderr, "ERROR: replay cache type not given\n"); exit(1); } break; case 's': if (optarg) service_principal = xstrdup(optarg); else { fprintf(stderr, "ERROR: service principal not given\n"); exit(1); } break; default: fprintf(stderr, "Usage: \n"); fprintf(stderr, "squid_kerb_auth [-d] [-i] [-s SPN] [-k keytab] [-c rcdir] [-t rctype]\n"); fprintf(stderr, "-d full debug\n"); fprintf(stderr, "-i informational messages\n"); fprintf(stderr, "-r remove realm from username\n"); fprintf(stderr, "-s service principal name\n"); fprintf(stderr, "-k keytab name\n"); fprintf(stderr, "-c replay cache directory\n"); fprintf(stderr, "-t replay cache type\n"); fprintf(stderr, "The SPN can be set to GSS_C_NO_NAME to allow any entry from keytab\n"); fprintf(stderr, "default SPN is HTTP/fqdn@DEFAULT_REALM\n"); exit(0); } } debug((char *) "%s| %s: INFO: Starting version %s\n", LogTime(), PROGRAM, SQUID_KERB_AUTH_VERSION); if (service_principal && strcasecmp(service_principal, "GSS_C_NO_NAME")) { if (!strstr(service_principal,"HTTP/")) { debug((char *) "%s| %s: WARN: service_principal %s does not start with HTTP/\n", LogTime(), PROGRAM, service_principal); } service.value = service_principal; service.length = strlen((char *) service.value); } else { host_name = gethost_name(); if (!host_name) { fprintf(stderr, "%s| %s: FATAL: Local hostname could not be determined. Please specify the service principal\n", LogTime(), PROGRAM); fprintf(stdout, "BH hostname error\n"); exit(-1); } service.value = xmalloc(strlen(service_name) + strlen(host_name) + 2); snprintf((char *) service.value, strlen(service_name) + strlen(host_name) + 2, "%s@%s", service_name, host_name); service.length = strlen((char *) service.value); xfree(host_name); } if (rcache_type) { rcache_type_env = (char *) xmalloc(strlen("KRB5RCACHETYPE=")+strlen(rcache_type)+1); strcpy(rcache_type_env, "KRB5RCACHETYPE="); strcat(rcache_type_env, rcache_type); putenv(rcache_type_env); debug((char *) "%s| %s: INFO: Setting replay cache type to %s\n", LogTime(), PROGRAM, rcache_type); } if (rcache_dir) { rcache_dir_env = (char *) xmalloc(strlen("KRB5RCACHEDIR=")+strlen(rcache_dir)+1); strcpy(rcache_dir_env, "KRB5RCACHEDIR="); strcat(rcache_dir_env, rcache_dir); putenv(rcache_dir_env); debug((char *) "%s| %s: INFO: Setting replay cache directory to %s\n", LogTime(), PROGRAM, rcache_dir); } if (keytab_name) { keytab_name_env = (char *) xmalloc(strlen("KRB5_KTNAME=")+strlen(keytab_name)+1); strcpy(keytab_name_env, "KRB5_KTNAME="); strcat(keytab_name_env, keytab_name); putenv(keytab_name_env); } else { keytab_name_env = getenv("KRB5_KTNAME"); if (!keytab_name_env) { ret = krb5_init_context(&context); if (!check_k5_err(context, "krb5_init_context", ret)) { krb5_kt_default_name(context, default_keytab, MAXPATHLEN); } keytab_name = xstrdup(default_keytab); krb5_free_context(context); } else keytab_name = xstrdup(keytab_name_env); } debug((char *) "%s| %s: INFO: Setting keytab to %s\n", LogTime(), PROGRAM, keytab_name); #if HAVE_KRB5_MEMORY_KEYTAB ret = krb5_init_context(&context); if (!check_k5_err(context, "krb5_init_context", ret)) { memory_keytab_name = (char *)xmalloc(strlen("MEMORY:negotiate_kerberos_auth_")+16); snprintf(memory_keytab_name, strlen("MEMORY:negotiate_kerberos_auth_")+16, "MEMORY:negotiate_kerberos_auth_%d", (unsigned int) getpid()); ret = krb5_read_keytab(context, keytab_name, &ktlist); if (check_k5_err(context, "krb5_read_keytab", ret)) { debug((char *) "%s| %s: ERROR: Reading keytab %s into list failed\n", LogTime(), PROGRAM, keytab_name); } else { ret = krb5_write_keytab(context, ktlist, memory_keytab_name); if (check_k5_err(context, "krb5_write_keytab", ret)) { debug((char *) "%s| %s: ERROR: Writing list into keytab %s\n", LogTime(), PROGRAM, memory_keytab_name); } else { keytab_name_env = (char *) xmalloc(strlen("KRB5_KTNAME=")+strlen(memory_keytab_name)+1); strcpy(keytab_name_env, "KRB5_KTNAME="); strcat(keytab_name_env, memory_keytab_name); putenv(keytab_name_env); xfree(keytab_name); keytab_name = xstrdup(memory_keytab_name); debug((char *) "%s| %s: INFO: Changed keytab to %s\n", LogTime(), PROGRAM, memory_keytab_name); } } ret = krb5_free_kt_list(context,ktlist); if (check_k5_err(context, "krb5_free_kt_list", ret)) { debug((char *) "%s| %s: ERROR: Freeing list failed\n", LogTime(), PROGRAM); } } krb5_free_context(context); #endif #ifdef HAVE_HEIMDAL_KERBEROS gsskrb5_register_acceptor_identity(keytab_name); #endif while (1) { if (fgets(buf, sizeof(buf) - 1, stdin) == NULL) { if (ferror(stdin)) { debug((char *) "%s| %s: FATAL: fgets() failed! dying..... errno=%d (%s)\n", LogTime(), PROGRAM, ferror(stdin), strerror(ferror(stdin))); fprintf(stdout, "BH input error\n"); exit(1); /* BIIG buffer */ } fprintf(stdout, "BH input error\n"); exit(0); } c = (char *) memchr(buf, '\n', sizeof(buf) - 1); if (c) { *c = '\0'; length = c - buf; } else { err = 1; } if (err) { debug((char *) "%s| %s: ERROR: Oversized message\n", LogTime(), PROGRAM); fprintf(stdout, "BH Oversized message\n"); err = 0; continue; } debug((char *) "%s| %s: DEBUG: Got '%s' from squid (length: %ld).\n", LogTime(), PROGRAM, buf, length); if (buf[0] == '\0') { debug((char *) "%s| %s: ERROR: Invalid request\n", LogTime(), PROGRAM); fprintf(stdout, "BH Invalid request\n"); continue; } if (strlen(buf) < 2) { debug((char *) "%s| %s: ERROR: Invalid request [%s]\n", LogTime(), PROGRAM, buf); fprintf(stdout, "BH Invalid request\n"); continue; } if (!strncmp(buf, "QQ", 2)) { gss_release_buffer(&minor_status, &input_token); gss_release_buffer(&minor_status, &output_token); gss_release_buffer(&minor_status, &service); gss_release_cred(&minor_status, &server_creds); if (server_name) gss_release_name(&minor_status, &server_name); if (client_name) gss_release_name(&minor_status, &client_name); if (gss_context != GSS_C_NO_CONTEXT) gss_delete_sec_context(&minor_status, &gss_context, NULL); if (kerberosToken) { /* Allocated by parseNegTokenInit, but no matching free function exists.. */ if (!spnego_flag) xfree(kerberosToken); } if (spnego_flag) { /* Allocated by makeNegTokenTarg, but no matching free function exists.. */ xfree(spnegoToken); } xfree(token); fprintf(stdout, "BH quit command\n"); exit(0); } if (strncmp(buf, "YR", 2) && strncmp(buf, "KK", 2)) { debug((char *) "%s| %s: ERROR: Invalid request [%s]\n", LogTime(), PROGRAM, buf); fprintf(stdout, "BH Invalid request\n"); continue; } if (!strncmp(buf, "YR", 2)) { if (gss_context != GSS_C_NO_CONTEXT) gss_delete_sec_context(&minor_status, &gss_context, NULL); gss_context = GSS_C_NO_CONTEXT; } if (strlen(buf) <= 3) { debug((char *) "%s| %s: ERROR: Invalid negotiate request [%s]\n", LogTime(), PROGRAM, buf); fprintf(stdout, "BH Invalid negotiate request\n"); continue; } input_token.length = (size_t)base64_decode_len(buf+3); debug((char *) "%s| %s: DEBUG: Decode '%s' (decoded length: %d).\n", LogTime(), PROGRAM, buf + 3, (int) input_token.length); input_token.value = xmalloc(input_token.length); input_token.length = (size_t)base64_decode((char *) input_token.value, (unsigned int)input_token.length, buf+3); if ((input_token.length >= sizeof ntlmProtocol + 1) && (!memcmp(input_token.value, ntlmProtocol, sizeof ntlmProtocol))) { debug((char *) "%s| %s: WARNING: received type %d NTLM token\n", LogTime(), PROGRAM, (int) *((unsigned char *) input_token.value + sizeof ntlmProtocol)); fprintf(stdout, "BH received type %d NTLM token\n", (int) *((unsigned char *) input_token.value + sizeof ntlmProtocol)); goto cleanup; } if (service_principal) { if (strcasecmp(service_principal, "GSS_C_NO_NAME")) { major_status = gss_import_name(&minor_status, &service, (gss_OID) GSS_C_NULL_OID, &server_name); } else { server_name = GSS_C_NO_NAME; major_status = GSS_S_COMPLETE; minor_status = 0; } } else { major_status = gss_import_name(&minor_status, &service, gss_nt_service_name, &server_name); } if (check_gss_err(major_status, minor_status, "gss_import_name()", log, 1)) goto cleanup; major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE, GSS_C_NO_OID_SET, GSS_C_ACCEPT, &server_creds, NULL, NULL); if (check_gss_err(major_status, minor_status, "gss_acquire_cred()", log, 1)) goto cleanup; major_status = gss_accept_sec_context(&minor_status, &gss_context, server_creds, &input_token, GSS_C_NO_CHANNEL_BINDINGS, &client_name, NULL, &output_token, &ret_flags, NULL, NULL); if (output_token.length) { spnegoToken = (const unsigned char *) output_token.value; spnegoTokenLength = output_token.length; token = (char *) xmalloc((size_t)base64_encode_len((int)spnegoTokenLength)); if (token == NULL) { debug((char *) "%s| %s: ERROR: Not enough memory\n", LogTime(), PROGRAM); fprintf(stdout, "BH Not enough memory\n"); goto cleanup; } base64_encode_str(token, base64_encode_len((int)spnegoTokenLength), (const char *) spnegoToken, (int)spnegoTokenLength); if (check_gss_err(major_status, minor_status, "gss_accept_sec_context()", log, 1)) goto cleanup; if (major_status & GSS_S_CONTINUE_NEEDED) { debug((char *) "%s| %s: INFO: continuation needed\n", LogTime(), PROGRAM); fprintf(stdout, "TT %s\n", token); goto cleanup; } gss_release_buffer(&minor_status, &output_token); major_status = gss_display_name(&minor_status, client_name, &output_token, NULL); if (check_gss_err(major_status, minor_status, "gss_display_name()", log, 1)) goto cleanup; user = (char *) xmalloc(output_token.length + 1); if (user == NULL) { debug((char *) "%s| %s: ERROR: Not enough memory\n", LogTime(), PROGRAM); fprintf(stdout, "BH Not enough memory\n"); goto cleanup; } memcpy(user, output_token.value, output_token.length); user[output_token.length] = '\0'; if (norealm && (p = strchr(user, '@')) != NULL) { *p = '\0'; } #if HAVE_PAC_SUPPORT ret = krb5_init_context(&context); if (!check_k5_err(context, "krb5_init_context", ret)) { #if USE_HEIMDAL_KRB5 #define ADWIN2KPAC 128 major_status = gsskrb5_extract_authz_data_from_sec_context(&minor_status, gss_context, ADWIN2KPAC, &data_set); if (!check_gss_err(major_status, minor_status, "gsskrb5_extract_authz_data_from_sec_context()", log, 0)) { ret = krb5_pac_parse(context, data_set.value, data_set.length, &pac); gss_release_buffer(&minor_status, &data_set); if (!check_k5_err(context, "krb5_pac_parse", ret)) { ag = get_ad_groups((char *)&ad_groups, context, pac); krb5_pac_free(context, pac); } krb5_free_context(context); } #else type_id.value = (void *)"mspac"; type_id.length = strlen((char *)type_id.value); #define KRB5PACLOGONINFO 1 major_status = gss_map_name_to_any(&minor_status, client_name, KRB5PACLOGONINFO, &type_id, (gss_any_t *)&pac); if (!check_gss_err(major_status, minor_status, "gss_map_name_to_any()", log, 0)) { ag = get_ad_groups((char *)&ad_groups,context, pac); } (void)gss_release_any_name_mapping(&minor_status, client_name, &type_id, (gss_any_t *)&pac); krb5_free_context(context); #endif } if (ag) { debug((char *) "%s| %s: DEBUG: Groups %s\n", LogTime(), PROGRAM, ag); } #endif fprintf(stdout, "AF %s %s\n", token, user); rfc_user = rfc1738_escape(user); debug((char *) "%s| %s: DEBUG: AF %s %s\n", LogTime(), PROGRAM, token, rfc_user); if (log) fprintf(stderr, "%s| %s: INFO: User %s authenticated\n", LogTime(), PROGRAM, rfc1738_escape(user)); goto cleanup; } else { if (check_gss_err(major_status, minor_status, "gss_accept_sec_context()", log, 1)) goto cleanup; if (major_status & GSS_S_CONTINUE_NEEDED) { debug((char *) "%s| %s: INFO: continuation needed\n", LogTime(), PROGRAM); fprintf(stdout, "NA %s\n", token); goto cleanup; } gss_release_buffer(&minor_status, &output_token); major_status = gss_display_name(&minor_status, client_name, &output_token, NULL); if (check_gss_err(major_status, minor_status, "gss_display_name()", log, 1)) goto cleanup; /* * Return dummy token AA. May need an extra return tag then AF */ user = (char *) xmalloc(output_token.length + 1); if (user == NULL) { debug((char *) "%s| %s: ERROR: Not enough memory\n", LogTime(), PROGRAM); fprintf(stdout, "BH Not enough memory\n"); goto cleanup; } memcpy(user, output_token.value, output_token.length); user[output_token.length] = '\0'; if (norealm && (p = strchr(user, '@')) != NULL) { *p = '\0'; } fprintf(stdout, "AF %s %s\n", "AA==", user); debug((char *) "%s| %s: DEBUG: AF %s %s\n", LogTime(), PROGRAM, "AA==", rfc1738_escape(user)); if (log) fprintf(stderr, "%s| %s: INFO: User %s authenticated\n", LogTime(), PROGRAM, rfc1738_escape(user)); } cleanup: gss_release_buffer(&minor_status, &input_token); gss_release_buffer(&minor_status, &output_token); gss_release_cred(&minor_status, &server_creds); if (server_name) gss_release_name(&minor_status, &server_name); if (client_name) gss_release_name(&minor_status, &client_name); if (kerberosToken) { /* Allocated by parseNegTokenInit, but no matching free function exists.. */ if (!spnego_flag) safe_free(kerberosToken); } if (spnego_flag) { /* Allocated by makeNegTokenTarg, but no matching free function exists.. */ safe_free(spnegoToken); } safe_free(token); safe_free(user); continue; } } #else #include #ifndef MAX_AUTHTOKEN_LEN #define MAX_AUTHTOKEN_LEN 65535 #endif int main(int argc, char *const argv[]) { setbuf(stdout, NULL); setbuf(stdin, NULL); char buf[MAX_AUTHTOKEN_LEN]; while (1) { if (fgets(buf, sizeof(buf) - 1, stdin) == NULL) { fprintf(stdout, "BH input error\n"); exit(0); } fprintf(stdout, "BH Kerberos authentication not supported\n"); } } #endif /* HAVE_GSSAPI */