diff options
Diffstat (limited to 'auth-krb4.c')
-rw-r--r-- | auth-krb4.c | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/auth-krb4.c b/auth-krb4.c index 031dcd30..f7a144f9 100644 --- a/auth-krb4.c +++ b/auth-krb4.c @@ -23,7 +23,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: auth-krb4.c,v 1.24 2001/06/26 16:15:22 dugsong Exp $"); +RCSID("$OpenBSD: auth-krb4.c,v 1.25 2001/12/19 07:18:56 deraadt Exp $"); #include "ssh.h" #include "ssh1.h" @@ -49,7 +49,7 @@ krb4_init(void *context) const char *tkt_root = TKT_ROOT; struct stat st; int fd; - + if (!authctxt->krb4_ticket_file) { /* Set unique ticket string manually since we're still root. */ authctxt->krb4_ticket_file = xmalloc(MAXPATHLEN); @@ -79,13 +79,13 @@ krb4_init(void *context) } /* Failure - cancel cleanup function, leaving ticket for inspection. */ log("WARNING: bad ticket file %s", authctxt->krb4_ticket_file); - + fatal_remove_cleanup(krb4_cleanup_proc, authctxt); cleanup_registered = 0; - + xfree(authctxt->krb4_ticket_file); authctxt->krb4_ticket_file = NULL; - + return (0); } @@ -103,10 +103,10 @@ auth_krb4_password(Authctxt *authctxt, const char *password) char localhost[MAXHOSTNAMELEN], phost[INST_SZ], realm[REALM_SZ]; u_int32_t faddr; int r; - + if ((pw = authctxt->pw) == NULL) return (0); - + /* * Try Kerberos password authentication only for non-root * users and only if Kerberos is installed. @@ -128,7 +128,7 @@ auth_krb4_password(Authctxt *authctxt, const char *password) } /* Successful authentication. */ chown(tkt_string(), pw->pw_uid, pw->pw_gid); - + /* * Now that we have a TGT, try to get a local * "rcmd" ticket to ensure that we are not talking @@ -138,7 +138,7 @@ auth_krb4_password(Authctxt *authctxt, const char *password) strlcpy(phost, (char *)krb_get_phost(localhost), sizeof(phost)); r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33); - + if (r == KSUCCESS) { if ((hp = gethostbyname(localhost)) == NULL) { log("Couldn't get local host address!"); @@ -146,7 +146,7 @@ auth_krb4_password(Authctxt *authctxt, const char *password) } memmove((void *)&faddr, (void *)hp->h_addr, sizeof(faddr)); - + /* Verify our "rcmd" ticket. */ r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost, faddr, &adata, ""); @@ -186,13 +186,13 @@ auth_krb4_password(Authctxt *authctxt, const char *password) } else /* Logging in as root or no local Kerberos realm. */ debug("Unable to authenticate to Kerberos."); - + failure: krb4_cleanup_proc(authctxt); - + if (!options.kerberos_or_local_passwd) return (0); - + /* Fall back to ordinary passwd authentication. */ return (-1); } @@ -220,9 +220,9 @@ auth_krb4(Authctxt *authctxt, KTEXT auth, char **client) socklen_t slen; u_int cksum; int r, s; - + s = packet_get_connection_in(); - + slen = sizeof(local); memset(&local, 0, sizeof(local)); if (getsockname(s, (struct sockaddr *) & local, &slen) < 0) @@ -235,7 +235,7 @@ auth_krb4(Authctxt *authctxt, KTEXT auth, char **client) } instance[0] = '*'; instance[1] = 0; - + /* Get the encrypted request, challenge, and session key. */ if ((r = krb_rd_req(auth, KRB4_SERVICE_NAME, instance, 0, &adat, ""))) { @@ -243,11 +243,11 @@ auth_krb4(Authctxt *authctxt, KTEXT auth, char **client) return (0); } des_key_sched((des_cblock *) adat.session, schedule); - + *client = xmalloc(MAX_K_NAME_SZ); (void) snprintf(*client, MAX_K_NAME_SZ, "%s%s%s@%s", adat.pname, *adat.pinst ? "." : "", adat.pinst, adat.prealm); - + /* Check ~/.klogin authorization now. */ if (kuserok(&adat, authctxt->user) != KSUCCESS) { log("Kerberos v4 .klogin authorization failed for %s to " @@ -259,7 +259,7 @@ auth_krb4(Authctxt *authctxt, KTEXT auth, char **client) session key. */ cksum = adat.checksum + 1; cksum = htonl(cksum); - + /* If we can't successfully encrypt the checksum, we send back an empty message, admitting our failure. */ if ((r = krb_mk_priv((u_char *) & cksum, reply.dat, sizeof(cksum) + 1, @@ -269,10 +269,10 @@ auth_krb4(Authctxt *authctxt, KTEXT auth, char **client) reply.length = 0; } else reply.length = r; - + /* Clear session key. */ memset(&adat.session, 0, sizeof(&adat.session)); - + packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE); packet_put_string((char *) reply.dat, reply.length); packet_send(); @@ -287,19 +287,19 @@ auth_krb4_tgt(Authctxt *authctxt, const char *string) { CREDENTIALS creds; struct passwd *pw; - + if ((pw = authctxt->pw) == NULL) goto failure; - + temporarily_use_uid(pw); - + if (!radix_to_creds(string, &creds)) { log("Protocol error decoding Kerberos v4 TGT"); goto failure; } if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ strlcpy(creds.service, "krbtgt", sizeof creds.service); - + if (strcmp(creds.service, "krbtgt")) { log("Kerberos v4 TGT (%s%s%s@%s) rejected for %s", creds.pname, creds.pinst[0] ? "." : "", creds.pinst, @@ -308,10 +308,10 @@ auth_krb4_tgt(Authctxt *authctxt, const char *string) } if (!krb4_init(authctxt)) goto failure; - + if (in_tkt(creds.pname, creds.pinst) != KSUCCESS) goto failure; - + if (save_credentials(creds.service, creds.instance, creds.realm, creds.session, creds.lifetime, creds.kvno, &creds.ticket_st, creds.issue_date) != KSUCCESS) { @@ -320,20 +320,20 @@ auth_krb4_tgt(Authctxt *authctxt, const char *string) } /* Successful authentication, passed all checks. */ chown(tkt_string(), pw->pw_uid, pw->pw_gid); - + debug("Kerberos v4 TGT accepted (%s%s%s@%s)", creds.pname, creds.pinst[0] ? "." : "", creds.pinst, creds.realm); memset(&creds, 0, sizeof(creds)); - + restore_uid(); - + return (1); - + failure: krb4_cleanup_proc(authctxt); memset(&creds, 0, sizeof(creds)); restore_uid(); - + return (0); } @@ -343,22 +343,22 @@ auth_afs_token(Authctxt *authctxt, const char *token_string) CREDENTIALS creds; struct passwd *pw; uid_t uid; - + if ((pw = authctxt->pw) == NULL) return (0); - + if (!radix_to_creds(token_string, &creds)) { log("Protocol error decoding AFS token"); return (0); } if (strncmp(creds.service, "", 1) == 0) /* backward compatibility */ strlcpy(creds.service, "afs", sizeof creds.service); - + if (strncmp(creds.pname, "AFS ID ", 7) == 0) uid = atoi(creds.pname + 7); else uid = pw->pw_uid; - + if (kafs_settoken(creds.realm, uid, &creds)) { log("AFS token (%s@%s) rejected for %s", creds.pname, creds.realm, pw->pw_name); @@ -367,7 +367,7 @@ auth_afs_token(Authctxt *authctxt, const char *token_string) } debug("AFS token accepted (%s@%s)", creds.pname, creds.realm); memset(&creds, 0, sizeof(creds)); - + return (1); } #endif /* AFS */ |