diff options
Diffstat (limited to 'auth-krb5.c')
| -rw-r--r-- | auth-krb5.c | 87 |
1 files changed, 45 insertions, 42 deletions
diff --git a/auth-krb5.c b/auth-krb5.c index b56f43a9..bf241208 100644 --- a/auth-krb5.c +++ b/auth-krb5.c @@ -2,7 +2,7 @@ * Kerberos v5 authentication and ticket-passing routines. * * $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $ - * $OpenBSD: auth-krb5.c,v 1.2 2001/11/12 01:47:09 dugsong Exp $ + * $OpenBSD: auth-krb5.c,v 1.4 2002/01/27 15:12:09 markus Exp $ */ #include "includes.h" @@ -26,7 +26,7 @@ krb5_init(void *context) Authctxt *authctxt = (Authctxt *)context; krb5_error_code problem; static int cleanup_registered = 0; - + if (authctxt->krb5_ctx == NULL) { problem = krb5_init_context(&authctxt->krb5_ctx); if (problem) @@ -45,7 +45,7 @@ krb5_init(void *context) * only, in auth is received ticket, in client is returned principal * from the ticket */ -int +int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client) { krb5_error_code problem; @@ -58,52 +58,52 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client) server = NULL; ticket = NULL; reply.length = 0; - + problem = krb5_init(authctxt); - if (problem) + if (problem) goto err; - + problem = krb5_auth_con_init(authctxt->krb5_ctx, &authctxt->krb5_auth_ctx); if (problem) goto err; - + fd = packet_get_connection_in(); problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, &fd); if (problem) goto err; - + problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL , KRB5_NT_SRV_HST, &server); if (problem) goto err; - + problem = krb5_rd_req(authctxt->krb5_ctx, &authctxt->krb5_auth_ctx, auth, server, NULL, NULL, &ticket); if (problem) goto err; - + problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client, &authctxt->krb5_user); if (problem) goto err; - + /* if client wants mutual auth */ problem = krb5_mk_rep(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, &reply); if (problem) goto err; - + /* Check .k5login authorization now. */ if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, authctxt->pw->pw_name)) goto err; - + if (client) krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user, client); - + packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE); packet_put_string((char *) reply.data, reply.length); packet_send(); @@ -117,7 +117,7 @@ auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client) krb5_free_ticket(authctxt->krb5_ctx, ticket); if (reply.length) xfree(reply.data); - + if (problem) debug("Kerberos v5 authentication failed: %s", krb5_get_err_text(authctxt->krb5_ctx, problem)); @@ -131,51 +131,51 @@ auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt) krb5_error_code problem; krb5_ccache ccache = NULL; char *pname; - + if (authctxt->pw == NULL || authctxt->krb5_user == NULL) return (0); - + temporarily_use_uid(authctxt->pw); - + problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache); if (problem) goto fail; - + problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache, authctxt->krb5_user); if (problem) goto fail; - + problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx, ccache, tgt); if (problem) goto fail; - + authctxt->krb5_fwd_ccache = ccache; ccache = NULL; - + authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); - + problem = krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user, &pname); if (problem) goto fail; - + debug("Kerberos v5 TGT accepted (%s)", pname); - + restore_uid(); - + return (1); - + fail: if (problem) debug("Kerberos v5 TGT passing failed: %s", krb5_get_err_text(authctxt->krb5_ctx, problem)); if (ccache) krb5_cc_destroy(authctxt->krb5_ctx, ccache); - + restore_uid(); - + return (0); } @@ -183,47 +183,50 @@ int auth_krb5_password(Authctxt *authctxt, const char *password) { krb5_error_code problem; - + if (authctxt->pw == NULL) return (0); - + temporarily_use_uid(authctxt->pw); - + problem = krb5_init(authctxt); if (problem) goto out; - + problem = krb5_parse_name(authctxt->krb5_ctx, authctxt->pw->pw_name, &authctxt->krb5_user); if (problem) goto out; - + problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops, &authctxt->krb5_fwd_ccache); if (problem) goto out; - + problem = krb5_cc_initialize(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache, authctxt->krb5_user); if (problem) goto out; - + + restore_uid(); problem = krb5_verify_user(authctxt->krb5_ctx, authctxt->krb5_user, authctxt->krb5_fwd_ccache, password, 1, NULL); + temporarily_use_uid(authctxt->pw); + if (problem) goto out; - + authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); - + out: restore_uid(); - + if (problem) { debug("Kerberos password authentication failed: %s", krb5_get_err_text(authctxt->krb5_ctx, problem)); - + krb5_cleanup_proc(authctxt); - + if (options.kerberos_or_local_passwd) return (-1); else @@ -236,7 +239,7 @@ void krb5_cleanup_proc(void *context) { Authctxt *authctxt = (Authctxt *)context; - + debug("krb5_cleanup_proc called"); if (authctxt->krb5_fwd_ccache) { krb5_cc_destroy(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache); |