1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <stdio.h> 30 #include <sys/fcntl.h> 31 #include <bsm/audit.h> 32 #include <bsm/audit_record.h> 33 #include <bsm/audit_uevents.h> 34 #include <bsm/libbsm.h> 35 #include <bsm/audit_private.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <syslog.h> 39 #include <netinet/in.h> 40 #include <locale.h> 41 #include <unistd.h> 42 #include <generic.h> 43 44 static au_event_t rshd_event; /* audit event number */ 45 static uint32_t rshd_addr[4]; /* peer address */ 46 47 static void generate_record(char *, char *, char *, int, char *); 48 static void setup_session(char *); 49 static int selected(uid_t, char *, au_event_t, int); 50 51 int 52 audit_rshd_setup() 53 { 54 rshd_event = AUE_rshd; 55 return (0); 56 } 57 58 /* ARGSUSED */ 59 int 60 audit_rshd_fail(msg, hostname, remuser, locuser, cmdbuf) 61 char *msg; /* message containing failure information */ 62 char *hostname; /* hostname of machine requesting service */ 63 char *remuser; /* username at machine requesting service */ 64 char *locuser; /* username of local machine */ 65 char *cmdbuf; /* command line to be executed locally */ 66 { 67 if (cannot_audit(0)) { 68 return (0); 69 } 70 generate_record(remuser, locuser, cmdbuf, -1, msg); 71 return (0); 72 } 73 74 /* ARGSUSED */ 75 int 76 audit_rshd_success(hostname, remuser, locuser, cmdbuf) 77 char *hostname; /* hostname of machine requesting service */ 78 char *remuser; /* username at machine requesting service */ 79 char *locuser; /* username at local machine */ 80 char *cmdbuf; /* command line to be executed locally */ 81 { 82 if (cannot_audit(0)) { 83 return (0); 84 } 85 generate_record(remuser, locuser, cmdbuf, 0, ""); 86 setup_session(locuser); 87 return (0); 88 } 89 90 91 #include <pwd.h> 92 93 static void 94 generate_record(char *remuser, /* username at machine requesting service */ 95 char *locuser, /* username of local machine */ 96 char *cmdbuf, /* command line to be executed locally */ 97 int sf_flag, /* success (0) or failure (-1) flag */ 98 char *msg) /* message containing failure information */ 99 { 100 int rd; /* audit record descriptor */ 101 char buf[256]; /* temporary buffer */ 102 char *tbuf; /* temporary buffer */ 103 int tlen; 104 const char *gtxt; 105 uid_t uid; 106 gid_t gid; 107 pid_t pid; 108 struct passwd *pwd; 109 struct auditinfo_addr info; 110 111 if (cannot_audit(0)) { 112 return; 113 } 114 115 pwd = getpwnam(locuser); 116 if (pwd == NULL) { 117 uid = -1; 118 gid = -1; 119 } else { 120 uid = pwd->pw_uid; 121 gid = pwd->pw_gid; 122 } 123 124 if (!selected(uid, locuser, rshd_event, sf_flag)) 125 return; 126 127 pid = getpid(); 128 129 /* see if terminal id already set */ 130 if (getaudit_addr(&info, sizeof (info)) < 0) { 131 perror("getaudit"); 132 } 133 rd = au_open(); 134 135 (void) au_write(rd, au_to_subject_ex(uid, uid, gid, uid, gid, pid, pid, 136 &info.ai_termid)); 137 138 gtxt = dgettext(bsm_dom, "cmd %s"); 139 tlen = strlen(gtxt) + strlen(cmdbuf) + 1; 140 if ((tbuf = malloc(tlen)) == NULL) { 141 (void) au_close(rd, 0, 0); 142 return; 143 } 144 (void) snprintf(tbuf, tlen, gtxt, cmdbuf); 145 (void) au_write(rd, au_to_text(tbuf)); 146 (void) free(tbuf); 147 148 if (strcmp(remuser, locuser) != 0) { 149 (void) snprintf(buf, sizeof (buf), dgettext(bsm_dom, 150 "remote user %s"), remuser); 151 (void) au_write(rd, au_to_text(buf)); 152 } 153 154 if (sf_flag == -1) { 155 (void) snprintf(buf, sizeof (buf), dgettext(bsm_dom, 156 "local user %s"), locuser); 157 (void) au_write(rd, au_to_text(buf)); 158 (void) au_write(rd, au_to_text(msg)); 159 } 160 161 #ifdef _LP64 162 (void) au_write(rd, au_to_return64(sf_flag, (int64_t)0)); 163 #else 164 (void) au_write(rd, au_to_return32(sf_flag, (int32_t)0)); 165 #endif 166 167 if (au_close(rd, 1, rshd_event) < 0) { 168 (void) au_close(rd, 0, 0); 169 } 170 } 171 172 static int 173 selected(uid_t uid, char *locuser, au_event_t event, int sf) 174 { 175 int rc, sorf; 176 char naflags[512]; 177 struct au_mask mask; 178 179 mask.am_success = mask.am_failure = 0; 180 if (uid < 0) { 181 rc = getacna(naflags, 256); /* get non-attrib flags */ 182 if (rc == 0) 183 (void) getauditflagsbin(naflags, &mask); 184 } else { 185 rc = au_user_mask(locuser, &mask); 186 } 187 188 if (sf == 0) 189 sorf = AU_PRS_SUCCESS; 190 else if (sf == -1) 191 sorf = AU_PRS_FAILURE; 192 else 193 sorf = AU_PRS_BOTH; 194 rc = au_preselect(event, &mask, sorf, AU_PRS_REREAD); 195 return (rc); 196 } 197 198 static void 199 setup_session(char *locuser) 200 { 201 int rc; 202 struct auditinfo_addr info; 203 au_mask_t mask; 204 uid_t uid; 205 struct passwd *pwd; 206 207 pwd = getpwnam(locuser); 208 if (pwd == NULL) 209 uid = -1; 210 else 211 uid = pwd->pw_uid; 212 213 /* see if terminal id already set */ 214 if (getaudit_addr(&info, sizeof (info)) < 0) { 215 perror("getaudit"); 216 } 217 218 info.ai_auid = uid; 219 info.ai_asid = getpid(); 220 221 mask.am_success = 0; 222 mask.am_failure = 0; 223 (void) au_user_mask(locuser, &mask); 224 225 info.ai_mask.am_success = mask.am_success; 226 info.ai_mask.am_failure = mask.am_failure; 227 228 rshd_addr[0] = info.ai_termid.at_addr[0]; 229 rshd_addr[1] = info.ai_termid.at_addr[1]; 230 rshd_addr[2] = info.ai_termid.at_addr[2]; 231 rshd_addr[3] = info.ai_termid.at_addr[3]; 232 233 rc = setaudit_addr(&info, sizeof (info)); 234 if (rc < 0) { 235 perror("setaudit"); 236 } 237 } 238