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File _service:tar_scm:backport-Fix-unimportant-memory-leaks.patch of Package krb5
From 6c5471176f5266564fbc8a7e02f03b4b042202f8 Mon Sep 17 00:00:00 2001 From: Steve Grubb <sgrubb@redhat.com> Date: Thu, 13 Jul 2023 16:22:30 -0400 Subject: [PATCH] Fix unimportant memory leaks Eliminate memory leaks detected through static analysis and manual review. These leaks are unlikely to happen repeatedly in long-running processes. [jrische@redhat.com: fixed many additional leaks] [ghudson@mit.edu: fixed additional leaks; edited for style; removed some unused ksu functions; rewrote commit message] Conflict:src/clients/ksu/ccache.c,src/clients/ksu/authorization.c,src/clients/ksu/krb_auth_su.c,src/lib/krb5/ccache/cc_kcm.c --- src/appl/gss-sample/gss-client.c | 367 ++++++++---------- src/appl/gss-sample/gss-server.c | 3 +- src/clients/klist/klist.c | 59 +-- src/clients/ksu/authorization.c | 136 +++---- src/clients/ksu/ccache.c | 283 +++++--------- src/clients/ksu/heuristic.c | 128 +++--- src/clients/ksu/krb_auth_su.c | 136 ++----- src/clients/ksu/ksu.h | 6 - src/clients/ksu/main.c | 3 +- src/kadmin/cli/keytab.c | 6 +- src/kadmin/ktutil/ktutil.c | 1 + src/kprop/kpropd.c | 21 +- src/lib/gssapi/krb5/export_cred.c | 4 +- src/lib/gssapi/krb5/val_cred.c | 6 +- src/lib/kadm5/srv/server_kdb.c | 7 +- src/lib/krb5/ccache/ccfns.c | 12 +- src/lib/krb5/keytab/kt_file.c | 3 +- src/plugins/kdb/ldap/libkdb_ldap/ldap_realm.c | 8 +- 18 files changed, 511 insertions(+), 678 deletions(-) diff --git a/src/appl/gss-sample/gss-client.c b/src/appl/gss-sample/gss-client.c index 6e2aa33..cf94623 100644 --- a/src/appl/gss-sample/gss-client.c +++ b/src/appl/gss-sample/gss-client.c @@ -182,180 +182,148 @@ client_establish_context(int s, char *service_name, OM_uint32 gss_flags, char *username, char *password, gss_ctx_id_t *gss_context, OM_uint32 *ret_flags) { - if (auth_flag) { - gss_buffer_desc send_tok, recv_tok, *token_ptr; - gss_name_t target_name; - OM_uint32 maj_stat, min_stat, init_sec_min_stat; - int token_flags; - gss_cred_id_t cred = GSS_C_NO_CREDENTIAL; - gss_name_t gss_username = GSS_C_NO_NAME; - gss_OID_set_desc mechs, *mechsp = GSS_C_NO_OID_SET; - - if (spnego) { - mechs.elements = &gss_spnego_mechanism_oid_desc; - mechs.count = 1; - mechsp = &mechs; - } else if (oid != GSS_C_NO_OID) { - mechs.elements = oid; - mechs.count = 1; - mechsp = &mechs; - } else { - mechs.elements = NULL; - mechs.count = 0; - } + int result = -1, st; + gss_buffer_desc send_tok, recv_tok, pwbuf, *token_ptr; + gss_name_t target_name = GSS_C_NO_NAME, gss_username = GSS_C_NO_NAME; + OM_uint32 maj_stat, min_stat, init_sec_min_stat; + int token_flags; + gss_cred_id_t cred = GSS_C_NO_CREDENTIAL; + gss_OID_set_desc mechs, neg_mechs, *mechsp = GSS_C_NO_OID_SET; + + if (!auth_flag) + return send_token(s, TOKEN_NOOP, empty_token); + + if (spnego) { + mechs.elements = &gss_spnego_mechanism_oid_desc; + mechs.count = 1; + mechsp = &mechs; + } else if (oid != GSS_C_NO_OID) { + mechs.elements = oid; + mechs.count = 1; + mechsp = &mechs; + } else { + mechs.elements = NULL; + mechs.count = 0; + } - if (username != NULL) { - send_tok.value = username; - send_tok.length = strlen(username); + if (username != NULL) { + send_tok.value = username; + send_tok.length = strlen(username); - maj_stat = gss_import_name(&min_stat, &send_tok, - (gss_OID) gss_nt_user_name, - &gss_username); - if (maj_stat != GSS_S_COMPLETE) { - display_status("parsing client name", maj_stat, min_stat); - return -1; - } - } - - if (password != NULL) { - gss_buffer_desc pwbuf; - - pwbuf.value = password; - pwbuf.length = strlen(password); - - maj_stat = gss_acquire_cred_with_password(&min_stat, - gss_username, - &pwbuf, 0, - mechsp, GSS_C_INITIATE, - &cred, NULL, NULL); - } else if (gss_username != GSS_C_NO_NAME) { - maj_stat = gss_acquire_cred(&min_stat, - gss_username, 0, - mechsp, GSS_C_INITIATE, - &cred, NULL, NULL); - } else - maj_stat = GSS_S_COMPLETE; + maj_stat = gss_import_name(&min_stat, &send_tok, + (gss_OID) gss_nt_user_name, &gss_username); if (maj_stat != GSS_S_COMPLETE) { - display_status("acquiring creds", maj_stat, min_stat); - gss_release_name(&min_stat, &gss_username); - return -1; + display_status("parsing client name", maj_stat, min_stat); + goto cleanup; } - if (spnego && oid != GSS_C_NO_OID) { - gss_OID_set_desc neg_mechs; - - neg_mechs.elements = oid; - neg_mechs.count = 1; + } - maj_stat = gss_set_neg_mechs(&min_stat, cred, &neg_mechs); - if (maj_stat != GSS_S_COMPLETE) { - display_status("setting neg mechs", maj_stat, min_stat); - gss_release_name(&min_stat, &gss_username); - gss_release_cred(&min_stat, &cred); - return -1; - } - } - gss_release_name(&min_stat, &gss_username); - - /* - * Import the name into target_name. Use send_tok to save - * local variable space. - */ - send_tok.value = service_name; - send_tok.length = strlen(service_name); - maj_stat = gss_import_name(&min_stat, &send_tok, - (gss_OID) gss_nt_service_name, - &target_name); + if (password != NULL) { + pwbuf.value = password; + pwbuf.length = strlen(password); + + maj_stat = gss_acquire_cred_with_password(&min_stat, gss_username, + &pwbuf, 0, mechsp, + GSS_C_INITIATE, &cred, NULL, + NULL); + } else if (gss_username != GSS_C_NO_NAME) { + maj_stat = gss_acquire_cred(&min_stat, gss_username, 0, mechsp, + GSS_C_INITIATE, &cred, NULL, NULL); + } else { + maj_stat = GSS_S_COMPLETE; + } + if (maj_stat != GSS_S_COMPLETE) { + display_status("acquiring creds", maj_stat, min_stat); + goto cleanup; + } + if (spnego && oid != GSS_C_NO_OID) { + neg_mechs.elements = oid; + neg_mechs.count = 1; + maj_stat = gss_set_neg_mechs(&min_stat, cred, &neg_mechs); if (maj_stat != GSS_S_COMPLETE) { - display_status("parsing name", maj_stat, min_stat); - return -1; + display_status("setting neg mechs", maj_stat, min_stat); + goto cleanup; } + } - if (!v1_format) { - if (send_token(s, TOKEN_NOOP | TOKEN_CONTEXT_NEXT, empty_token) < - 0) { - (void) gss_release_name(&min_stat, &target_name); - return -1; - } - } + /* Import the name into target_name. Use send_tok to save local variable + * space. */ + send_tok.value = service_name; + send_tok.length = strlen(service_name); + maj_stat = gss_import_name(&min_stat, &send_tok, + (gss_OID) gss_nt_service_name, &target_name); + if (maj_stat != GSS_S_COMPLETE) { + display_status("parsing name", maj_stat, min_stat); + goto cleanup; + } - /* - * Perform the context-establishement loop. - * - * On each pass through the loop, token_ptr points to the token - * to send to the server (or GSS_C_NO_BUFFER on the first pass). - * Every generated token is stored in send_tok which is then - * transmitted to the server; every received token is stored in - * recv_tok, which token_ptr is then set to, to be processed by - * the next call to gss_init_sec_context. - * - * GSS-API guarantees that send_tok's length will be non-zero - * if and only if the server is expecting another token from us, - * and that gss_init_sec_context returns GSS_S_CONTINUE_NEEDED if - * and only if the server has another token to send us. - */ - - token_ptr = GSS_C_NO_BUFFER; - *gss_context = GSS_C_NO_CONTEXT; - - do { - maj_stat = gss_init_sec_context(&init_sec_min_stat, - cred, gss_context, - target_name, mechs.elements, - gss_flags, 0, - NULL, /* channel bindings */ - token_ptr, NULL, /* mech type */ - &send_tok, ret_flags, - NULL); /* time_rec */ - - if (token_ptr != GSS_C_NO_BUFFER) - free(recv_tok.value); - - if (send_tok.length != 0) { - if (verbose) - printf("Sending init_sec_context token (size=%d)...", - (int) send_tok.length); - if (send_token(s, v1_format ? 0 : TOKEN_CONTEXT, &send_tok) < - 0) { - (void) gss_release_buffer(&min_stat, &send_tok); - (void) gss_release_name(&min_stat, &target_name); - return -1; - } + if (!v1_format) { + if (send_token(s, TOKEN_NOOP | TOKEN_CONTEXT_NEXT, empty_token) < 0) + goto cleanup; + } + + /* + * Perform the context-establishment loop. + * + * On each pass through the loop, token_ptr points to the token to send to + * the server (or GSS_C_NO_BUFFER on the first pass). Every generated + * token is stored in send_tok which is then transmitted to the server; + * every received token is stored in recv_tok, which token_ptr is then set + * to, to be processed by the next call to gss_init_sec_context. + * + * GSS-API guarantees that send_tok's length will be non-zero if and only + * if the server is expecting another token from us, and that + * gss_init_sec_context returns GSS_S_CONTINUE_NEEDED if and only if the + * server has another token to send us. + */ + + token_ptr = GSS_C_NO_BUFFER; + *gss_context = GSS_C_NO_CONTEXT; + + do { + maj_stat = gss_init_sec_context(&init_sec_min_stat, cred, gss_context, + target_name, mechs.elements, gss_flags, + 0, NULL, token_ptr, NULL, &send_tok, + ret_flags, NULL); + + if (token_ptr != GSS_C_NO_BUFFER) + free(recv_tok.value); + + if (send_tok.length > 0) { + if (verbose) { + printf("Sending init_sec_context token (size=%d)...", + (int) send_tok.length); } + st = send_token(s, v1_format ? 0 : TOKEN_CONTEXT, &send_tok); (void) gss_release_buffer(&min_stat, &send_tok); + if (st < 0) + goto cleanup; + } - if (maj_stat != GSS_S_COMPLETE - && maj_stat != GSS_S_CONTINUE_NEEDED) { - display_status("initializing context", maj_stat, - init_sec_min_stat); - (void) gss_release_name(&min_stat, &target_name); - (void) gss_release_cred(&min_stat, &cred); - if (*gss_context != GSS_C_NO_CONTEXT) - gss_delete_sec_context(&min_stat, gss_context, - GSS_C_NO_BUFFER); - return -1; - } + if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED) { + display_status("initializing context", maj_stat, + init_sec_min_stat); + goto cleanup; + } - if (maj_stat == GSS_S_CONTINUE_NEEDED) { - if (verbose) - printf("continue needed..."); - if (recv_token(s, &token_flags, &recv_tok) < 0) { - (void) gss_release_name(&min_stat, &target_name); - return -1; - } - token_ptr = &recv_tok; - } + if (maj_stat == GSS_S_CONTINUE_NEEDED) { if (verbose) - printf("\n"); - } while (maj_stat == GSS_S_CONTINUE_NEEDED); + printf("continue needed..."); + if (recv_token(s, &token_flags, &recv_tok) < 0) + goto cleanup; + token_ptr = &recv_tok; + } + if (verbose) + printf("\n"); + } while (maj_stat == GSS_S_CONTINUE_NEEDED); - (void) gss_release_cred(&min_stat, &cred); - (void) gss_release_name(&min_stat, &target_name); - } else { - if (send_token(s, TOKEN_NOOP, empty_token) < 0) - return -1; - } + result = 0; - return 0; +cleanup: + (void) gss_release_name(&min_stat, &gss_username); + (void) gss_release_cred(&min_stat, &cred); + (void) gss_release_name(&min_stat, &target_name); + return result; } static void @@ -449,11 +417,11 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, { gss_ctx_id_t context = GSS_C_NO_CONTEXT; gss_buffer_desc in_buf, out_buf; - int s, state; + int s = -1, result = -1, state; OM_uint32 ret_flags; OM_uint32 maj_stat, min_stat; - gss_name_t src_name, targ_name; - gss_buffer_desc sname, tname; + gss_name_t src_name = GSS_C_NO_NAME, targ_name = GSS_C_NO_NAME; + gss_buffer_desc sname = GSS_C_EMPTY_BUFFER, tname = GSS_C_EMPTY_BUFFER; OM_uint32 lifetime; gss_OID mechanism, name_type; int is_local; @@ -467,14 +435,13 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, /* Open connection */ if ((s = connect_to_server(host, port)) < 0) - return -1; + goto cleanup; /* Establish context */ if (client_establish_context(s, service_name, gss_flags, auth_flag, v1_format, oid, username, password, &context, &ret_flags) < 0) { - (void) closesocket(s); - return -1; + goto cleanup; } if (auth_flag && verbose) { @@ -488,19 +455,19 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, &is_local, &is_open); if (maj_stat != GSS_S_COMPLETE) { display_status("inquiring context", maj_stat, min_stat); - return -1; + goto cleanup; } maj_stat = gss_display_name(&min_stat, src_name, &sname, &name_type); if (maj_stat != GSS_S_COMPLETE) { display_status("displaying source name", maj_stat, min_stat); - return -1; + goto cleanup; } maj_stat = gss_display_name(&min_stat, targ_name, &tname, (gss_OID *) NULL); if (maj_stat != GSS_S_COMPLETE) { display_status("displaying target name", maj_stat, min_stat); - return -1; + goto cleanup; } printf("\"%.*s\" to \"%.*s\", lifetime %d, flags %x, %s, %s\n", (int) sname.length, (char *) sname.value, @@ -509,15 +476,10 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, (is_local) ? "locally initiated" : "remotely initiated", (is_open) ? "open" : "closed"); - (void) gss_release_name(&min_stat, &src_name); - (void) gss_release_name(&min_stat, &targ_name); - (void) gss_release_buffer(&min_stat, &sname); - (void) gss_release_buffer(&min_stat, &tname); - maj_stat = gss_oid_to_str(&min_stat, name_type, &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); - return -1; + goto cleanup; } printf("Name type of source name is %.*s.\n", (int) oid_name.length, (char *) oid_name.value); @@ -528,13 +490,13 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, mechanism, &mech_names); if (maj_stat != GSS_S_COMPLETE) { display_status("inquiring mech names", maj_stat, min_stat); - return -1; + goto cleanup; } maj_stat = gss_oid_to_str(&min_stat, mechanism, &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); - return -1; + goto cleanup; } printf("Mechanism %.*s supports %d names\n", (int) oid_name.length, (char *) oid_name.value, @@ -546,7 +508,7 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, &mech_names->elements[i], &oid_name); if (maj_stat != GSS_S_COMPLETE) { display_status("converting oid->string", maj_stat, min_stat); - return -1; + goto cleanup; } printf(" %d: %.*s\n", (int) i, (int) oid_name.length, (char *) oid_name.value); @@ -571,10 +533,7 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, &in_buf, &state, &out_buf); if (maj_stat != GSS_S_COMPLETE) { display_status("wrapping message", maj_stat, min_stat); - (void) closesocket(s); - (void) gss_delete_sec_context(&min_stat, &context, - GSS_C_NO_BUFFER); - return -1; + goto cleanup; } else if (encrypt_flag && !state) { fprintf(stderr, "Warning! Message not encrypted.\n"); } @@ -588,22 +547,15 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, (wrap_flag ? TOKEN_WRAPPED : 0) | (encrypt_flag ? TOKEN_ENCRYPTED : 0) | (mic_flag ? TOKEN_SEND_MIC : 0))), - &out_buf) < 0) { - (void) closesocket(s); - (void) gss_delete_sec_context(&min_stat, &context, - GSS_C_NO_BUFFER); - return -1; - } + &out_buf) < 0) + goto cleanup; + if (out_buf.value != in_buf.value) (void) gss_release_buffer(&min_stat, &out_buf); /* Read signature block into out_buf */ - if (recv_token(s, &token_flags, &out_buf) < 0) { - (void) closesocket(s); - (void) gss_delete_sec_context(&min_stat, &context, - GSS_C_NO_BUFFER); - return -1; - } + if (recv_token(s, &token_flags, &out_buf) < 0) + goto cleanup; if (mic_flag) { /* Verify signature block */ @@ -611,10 +563,7 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, &out_buf, &qop_state); if (maj_stat != GSS_S_COMPLETE) { display_status("verifying signature", maj_stat, min_stat); - (void) closesocket(s); - (void) gss_delete_sec_context(&min_stat, &context, - GSS_C_NO_BUFFER); - return -1; + goto cleanup; } if (verbose) @@ -634,23 +583,17 @@ call_server(host, port, oid, service_name, gss_flags, auth_flag, if (!v1_format) (void) send_token(s, TOKEN_NOOP, empty_token); - if (auth_flag) { - /* Delete context */ - maj_stat = gss_delete_sec_context(&min_stat, &context, &out_buf); - if (maj_stat != GSS_S_COMPLETE) { - display_status("deleting context", maj_stat, min_stat); - (void) closesocket(s); - (void) gss_delete_sec_context(&min_stat, &context, - GSS_C_NO_BUFFER); - return -1; - } - - (void) gss_release_buffer(&min_stat, &out_buf); - } - - (void) closesocket(s); + result = 0; - return 0; +cleanup: + (void) gss_release_name(&min_stat, &src_name); + (void) gss_release_name(&min_stat, &targ_name); + (void) gss_release_buffer(&min_stat, &sname); + (void) gss_release_buffer(&min_stat, &tname); + (void) gss_delete_sec_context(&min_stat, &context, GSS_C_NO_BUFFER); + if (s >= 0) + (void) closesocket(s); + return result; } static void diff --git a/src/appl/gss-sample/gss-server.c b/src/appl/gss-sample/gss-server.c index a0e19fc..4a399d4 100644 --- a/src/appl/gss-sample/gss-server.c +++ b/src/appl/gss-sample/gss-server.c @@ -138,13 +138,12 @@ server_acquire_creds(char *service_name, gss_OID mech, } maj_stat = gss_acquire_cred(&min_stat, server_name, 0, mechs, GSS_C_ACCEPT, server_creds, NULL, NULL); + (void) gss_release_name(&min_stat, &server_name); if (maj_stat != GSS_S_COMPLETE) { display_status("acquiring credentials", maj_stat, min_stat); return -1; } - (void) gss_release_name(&min_stat, &server_name); - return 0; } diff --git a/src/clients/klist/klist.c b/src/clients/klist/klist.c index dcdc5a2..43392d2 100644 --- a/src/clients/klist/klist.c +++ b/src/clients/klist/klist.c @@ -469,20 +469,21 @@ do_ccache() static int show_ccache(krb5_ccache cache) { - krb5_cc_cursor cur; + krb5_cc_cursor cur = NULL; krb5_creds creds; - krb5_principal princ; + krb5_principal princ = NULL; krb5_error_code ret; + int status = 1; ret = krb5_cc_get_principal(context, cache, &princ); if (ret) { com_err(progname, ret, ""); - return 1; + goto cleanup; } ret = krb5_unparse_name(context, princ, &defname); if (ret) { com_err(progname, ret, _("while unparsing principal name")); - return 1; + goto cleanup; } printf(_("Ticket cache: %s:%s\nDefault principal: %s\n\n"), @@ -498,27 +499,33 @@ show_ccache(krb5_ccache cache) ret = krb5_cc_start_seq_get(context, cache, &cur); if (ret) { com_err(progname, ret, _("while starting to retrieve tickets")); - return 1; + goto cleanup; } while ((ret = krb5_cc_next_cred(context, cache, &cur, &creds)) == 0) { if (show_config || !krb5_is_config_principal(context, creds.server)) show_credential(&creds); krb5_free_cred_contents(context, &creds); } - krb5_free_principal(context, princ); - krb5_free_unparsed_name(context, defname); - defname = NULL; if (ret == KRB5_CC_END) { ret = krb5_cc_end_seq_get(context, cache, &cur); + cur = NULL; if (ret) { com_err(progname, ret, _("while finishing ticket retrieval")); - return 1; + goto cleanup; } - return 0; } else { com_err(progname, ret, _("while retrieving a ticket")); - return 1; + goto cleanup; } + + status = 0; + +cleanup: + if (cur != NULL) + (void)krb5_cc_end_seq_get(context, cache, &cur); + krb5_free_principal(context, princ); + krb5_free_unparsed_name(context, defname); + return status; } /* Return 0 if cache is accessible, present, and unexpired; return 1 if not. */ @@ -526,15 +533,18 @@ static int check_ccache(krb5_ccache cache) { krb5_error_code ret; - krb5_cc_cursor cur; + krb5_cc_cursor cur = NULL; krb5_creds creds; - krb5_principal princ; - krb5_boolean found_tgt, found_current_tgt, found_current_cred; + krb5_principal princ = NULL; + krb5_boolean found_tgt = FALSE, found_current_tgt = FALSE; + krb5_boolean found_current_cred = FALSE; - if (krb5_cc_get_principal(context, cache, &princ) != 0) - return 1; - if (krb5_cc_start_seq_get(context, cache, &cur) != 0) - return 1; + ret = krb5_cc_get_principal(context, cache, &princ); + if (ret) + goto cleanup; + ret = krb5_cc_start_seq_get(context, cache, &cur); + if (ret) + goto cleanup; found_tgt = found_current_tgt = found_current_cred = FALSE; while ((ret = krb5_cc_next_cred(context, cache, &cur, &creds)) == 0) { if (is_local_tgt(creds.server, &princ->realm)) { @@ -547,12 +557,17 @@ check_ccache(krb5_ccache cache) } krb5_free_cred_contents(context, &creds); } - krb5_free_principal(context, princ); if (ret != KRB5_CC_END) - return 1; - if (krb5_cc_end_seq_get(context, cache, &cur) != 0) - return 1; + goto cleanup; + ret = krb5_cc_end_seq_get(context, cache, &cur); + cur = NULL; +cleanup: + if (cur != NULL) + (void)krb5_cc_end_seq_get(context, cache, &cur); + krb5_free_principal(context, princ); + if (ret) + return 1; /* If the cache contains at least one local TGT, require that it be * current. Otherwise accept any current cred. */ if (found_tgt) diff --git a/src/clients/ksu/authorization.c b/src/clients/ksu/authorization.c index 6ea1084..a583591 100644 --- a/src/clients/ksu/authorization.c +++ b/src/clients/ksu/authorization.c @@ -28,7 +28,17 @@ #include "ksu.h" -static void auth_cleanup (FILE *, FILE *, char *); +static void +free_fcmd_list(char **list) +{ + size_t i; + + if (list == NULL) + return; + for (i = 0; i < MAX_CMD && list[i] != NULL; i++) + free(list[i]); + free(list); +} krb5_boolean fowner(fp, uid) FILE *fp; @@ -53,10 +63,10 @@ krb5_boolean fowner(fp, uid) /* * Given a Kerberos principal "principal", and a local username "luser", - * determine whether user is authorized to login according to the - * authorization files ~luser/.k5login" and ~luser/.k5users. Returns TRUE - * if authorized, FALSE if not authorized. - * + * determine whether user is authorized to login according to the authorization + * files ~luser/.k5login" and ~luser/.k5users. Set *ok to TRUE if authorized, + * FALSE if not authorized. Return 0 if the authorization check succeeded + * (regardless of its result), non-zero if it encountered an error. */ krb5_error_code krb5_authorization(context, principal, luser, @@ -71,7 +81,7 @@ krb5_error_code krb5_authorization(context, principal, luser, char **out_fcmd; { struct passwd *pwd; - char *princname; + char *princname = NULL; int k5login_flag =0; int k5users_flag =0; krb5_boolean retbool =FALSE; @@ -83,7 +93,7 @@ krb5_error_code krb5_authorization(context, principal, luser, /* no account => no access */ if ((pwd = getpwnam(luser)) == NULL) - return 0; + goto cleanup; retval = krb5_unparse_name(context, principal, &princname); if (retval) @@ -100,22 +110,19 @@ krb5_error_code krb5_authorization(context, principal, luser, /* k5login and k5users must be owned by target user or root */ if (!k5login_flag){ - if ((login_fp = fopen(k5login_path, "r")) == NULL) - return 0; - if ( fowner(login_fp, pwd->pw_uid) == FALSE) { - fclose(login_fp); - return 0; - } + login_fp = fopen(k5login_path, "r"); + if (login_fp == NULL) + goto cleanup; + if (fowner(login_fp, pwd->pw_uid) == FALSE) + goto cleanup; } if (!k5users_flag){ - if ((users_fp = fopen(k5users_path, "r")) == NULL) { - return 0; - } - if ( fowner(users_fp, pwd->pw_uid) == FALSE){ - fclose(users_fp); - return 0; - } + users_fp = fopen(k5users_path, "r"); + if (users_fp == NULL) + goto cleanup; + if (fowner(users_fp, pwd->pw_uid) == FALSE) + goto cleanup; } if (auth_debug){ @@ -134,10 +141,8 @@ krb5_error_code krb5_authorization(context, principal, luser, princname); retval = k5login_lookup(login_fp, princname, &retbool); - if (retval) { - auth_cleanup(users_fp, login_fp, princname); - return retval; - } + if (retval) + goto cleanup; if (retbool) { if (cmd) *out_fcmd = xstrdup(cmd); @@ -147,10 +152,8 @@ krb5_error_code krb5_authorization(context, principal, luser, if ((!k5users_flag) && (retbool == FALSE) ){ retval = k5users_lookup (users_fp, princname, cmd, &retbool, out_fcmd); - if(retval) { - auth_cleanup(users_fp, login_fp, princname); - return retval; - } + if (retval) + goto cleanup; } if (k5login_flag && k5users_flag){ @@ -166,8 +169,14 @@ krb5_error_code krb5_authorization(context, principal, luser, } *ok =retbool; - auth_cleanup(users_fp, login_fp, princname); - return 0; + +cleanup: + if (users_fp != NULL) + fclose(users_fp); + if (login_fp != NULL) + fclose(login_fp); + free(princname); + return retval; } /*********************************************************** @@ -334,10 +343,11 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) char **out_err; { char * err; - char ** tmp_fcmd; + char ** tmp_fcmd = NULL; char * path_ptr, *path; char * lp, * tc; int i=0; + krb5_boolean ok = FALSE; tmp_fcmd = (char **) xcalloc (MAX_CMD, sizeof(char *)); @@ -345,7 +355,7 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) tmp_fcmd[0] = xstrdup(fcmd); tmp_fcmd[1] = NULL; *out_fcmd = tmp_fcmd; - return TRUE; + tmp_fcmd = NULL; }else{ /* must be either full path or just the cmd name */ if (strchr(fcmd, '/')){ @@ -353,7 +363,7 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) "either full path or just the cmd name\n"), fcmd, KRB5_USERS_NAME); *out_err = err; - return FALSE; + goto cleanup; } #ifndef CMD_PATH @@ -361,7 +371,7 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) "the cmd name, CMD_PATH must be defined \n"), fcmd, KRB5_USERS_NAME, fcmd); *out_err = err; - return FALSE; + goto cleanup; #else path = xstrdup (CMD_PATH); @@ -375,7 +385,7 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) asprintf(&err, _("Error: bad entry - %s in %s file, CMD_PATH " "contains no paths \n"), fcmd, KRB5_USERS_NAME); *out_err = err; - return FALSE; + goto cleanup; } i=0; @@ -384,7 +394,7 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) asprintf(&err, _("Error: bad path %s in CMD_PATH for %s must " "start with '/' \n"), tc, KRB5_USERS_NAME ); *out_err = err; - return FALSE; + goto cleanup; } tmp_fcmd[i] = xasprintf("%s/%s", tc, fcmd); @@ -395,10 +405,15 @@ krb5_boolean fcmd_resolve(fcmd, out_fcmd, out_err) tmp_fcmd[i] = NULL; *out_fcmd = tmp_fcmd; - return TRUE; - + tmp_fcmd = NULL; #endif /* CMD_PATH */ } + + ok = TRUE; + +cleanup: + free_fcmd_list(tmp_fcmd); + return ok; } /******************************************** @@ -524,41 +539,42 @@ int match_commands (fcmd, cmd, match, cmd_out, err_out) char **cmd_out; char **err_out; { - char ** fcmd_arr; + char ** fcmd_arr = NULL; char * err; char * cmd_temp; + int result = 1; if(fcmd_resolve(fcmd, &fcmd_arr, &err )== FALSE ){ *err_out = err; - return 1; + goto cleanup; } if (cmd_single( cmd ) == TRUE){ if (!cmd_arr_cmp_postfix(fcmd_arr, cmd)){ /* found */ - - if(find_first_cmd_that_exists( fcmd_arr,&cmd_temp,&err)== TRUE){ - *match = TRUE; - *cmd_out = cmd_temp; - return 0; - }else{ + if (!find_first_cmd_that_exists(fcmd_arr, &cmd_temp, &err)) { *err_out = err; - return 1; + goto cleanup; } - }else{ + + *match = TRUE; + *cmd_out = cmd_temp; + } else { *match = FALSE; - return 0; } }else{ if (!cmd_arr_cmp(fcmd_arr, cmd)){ /* found */ *match = TRUE; *cmd_out = xstrdup(cmd); - return 0; } else{ *match = FALSE; - return 0; } } + result = 0; + +cleanup: + free_fcmd_list(fcmd_arr); + return result; } /********************************************************* @@ -587,10 +603,7 @@ krb5_error_code get_line (fp, out_line) } else { chunk_count ++; - if(!( line = (char *) realloc( line, - chunk_count * sizeof(char) * BUFSIZ))){ - return ENOMEM; - } + line = xrealloc(line, chunk_count * BUFSIZ); line_ptr = line + (BUFSIZ -1) *( chunk_count -1) ; } @@ -677,19 +690,6 @@ char * get_next_token (lnext) return out_ptr; } -static void auth_cleanup(users_fp, login_fp, princname) - FILE *users_fp; - FILE *login_fp; - char *princname; -{ - - free (princname); - if (users_fp) - fclose(users_fp); - if (login_fp) - fclose(login_fp); -} - void init_auth_names(pw_dir) char *pw_dir; { diff --git a/src/clients/ksu/ccache.c b/src/clients/ksu/ccache.c index cbb9aa2..5a8e908 100644 --- a/src/clients/ksu/ccache.c +++ b/src/clients/ksu/ccache.c @@ -39,6 +39,17 @@ gets rid of any expired tickets in the secondary cache, copies the default cache into the secondary cache, ************************************************************************/ +static void +free_creds_list(krb5_context context, krb5_creds **list) +{ + size_t i; + + if (list == NULL) + return; + for (i = 0; list[i]; i++) + krb5_free_creds(context, list[i]); + free(list); +} void show_credential(); @@ -59,20 +70,19 @@ krb5_error_code krb5_ccache_copy(context, cc_def, target_principal, cc_target, /* OUT */ krb5_boolean *stored; { - int i=0; krb5_error_code retval=0; krb5_creds ** cc_def_creds_arr = NULL; krb5_creds ** cc_other_creds_arr = NULL; if (ks_ccache_is_initialized(context, cc_def)) { - if((retval = krb5_get_nonexp_tkts(context,cc_def,&cc_def_creds_arr))){ - return retval; - } + retval = krb5_get_nonexp_tkts(context, cc_def, &cc_def_creds_arr); + if (retval) + goto cleanup; } retval = krb5_cc_initialize(context, cc_target, target_principal); if (retval) - return retval; + goto cleanup; if (restrict_creds) { retval = krb5_store_some_creds(context, cc_target, cc_def_creds_arr, @@ -85,22 +95,9 @@ krb5_error_code krb5_ccache_copy(context, cc_def, target_principal, cc_target, cc_other_creds_arr); } - if (cc_def_creds_arr){ - while (cc_def_creds_arr[i]){ - krb5_free_creds(context, cc_def_creds_arr[i]); - i++; - } - } - - i=0; - - if(cc_other_creds_arr){ - while (cc_other_creds_arr[i]){ - krb5_free_creds(context, cc_other_creds_arr[i]); - i++; - } - } - +cleanup: + free_creds_list(context, cc_def_creds_arr); + free_creds_list(context, cc_other_creds_arr); return retval; } @@ -198,32 +195,29 @@ krb5_error_code krb5_get_nonexp_tkts(context, cc, creds_array) { krb5_creds creds, temp_tktq, temp_tkt; - krb5_creds **temp_creds; + krb5_creds **temp_creds = NULL; krb5_error_code retval=0; krb5_cc_cursor cur; int count = 0; int chunk_count = 1; - if ( ! ( temp_creds = (krb5_creds **) malloc( CHUNK * sizeof(krb5_creds *)))){ - return ENOMEM; - } - - + temp_creds = xcalloc(CHUNK, sizeof(*temp_creds)); memset(&temp_tktq, 0, sizeof(temp_tktq)); memset(&temp_tkt, 0, sizeof(temp_tkt)); memset(&creds, 0, sizeof(creds)); /* initialize the cursor */ - if ((retval = krb5_cc_start_seq_get(context, cc, &cur))) { - return retval; - } + retval = krb5_cc_start_seq_get(context, cc, &cur); + if (retval) + goto cleanup; while (!(retval = krb5_cc_next_cred(context, cc, &cur, &creds))){ if (!krb5_is_config_principal(context, creds.server) && (retval = krb5_check_exp(context, creds.times))){ + krb5_free_cred_contents(context, &creds); if (retval != KRB5KRB_AP_ERR_TKT_EXPIRED){ - return retval; + goto cleanup; } if (auth_debug){ fprintf(stderr,"krb5_ccache_copy: CREDS EXPIRED:\n"); @@ -233,19 +227,19 @@ krb5_error_code krb5_get_nonexp_tkts(context, cc, creds_array) } } else { /* these credentials didn't expire */ - - if ((retval = krb5_copy_creds(context, &creds, - &temp_creds[count]))){ - return retval; - } + retval = krb5_copy_creds(context, &creds, &temp_creds[count]); + krb5_free_cred_contents(context, &creds); + temp_creds[count+1] = NULL; + if (retval) + goto cleanup; count ++; if (count == (chunk_count * CHUNK -1)){ chunk_count ++; - if (!(temp_creds = (krb5_creds **) realloc(temp_creds, - chunk_count * CHUNK * sizeof(krb5_creds *)))){ - return ENOMEM; - } + + temp_creds = xrealloc(temp_creds, + chunk_count * CHUNK * + sizeof(*temp_creds)); } } @@ -253,13 +247,15 @@ krb5_error_code krb5_get_nonexp_tkts(context, cc, creds_array) temp_creds[count] = NULL; *creds_array = temp_creds; + temp_creds = NULL; if (retval == KRB5_CC_END) { retval = krb5_cc_end_seq_get(context, cc, &cur); } +cleanup: + free_creds_list(context, temp_creds); return retval; - } @@ -332,94 +328,6 @@ void printtime(krb5_timestamp ts) } -krb5_error_code -krb5_get_login_princ(luser, princ_list) - const char *luser; - char ***princ_list; -{ - struct stat sbuf; - struct passwd *pwd; - char pbuf[MAXPATHLEN]; - FILE *fp; - char * linebuf; - char *newline; - int gobble, result; - char ** buf_out; - struct stat st_temp; - int count = 0, chunk_count = 1; - - /* no account => no access */ - - if ((pwd = getpwnam(luser)) == NULL) { - return 0; - } - result = snprintf(pbuf, sizeof(pbuf), "%s/.k5login", pwd->pw_dir); - if (SNPRINTF_OVERFLOW(result, sizeof(pbuf))) { - fprintf(stderr, _("home directory path for %s too long\n"), luser); - exit (1); - } - - if (stat(pbuf, &st_temp)) { /* not accessible */ - return 0; - } - - - /* open ~/.k5login */ - if ((fp = fopen(pbuf, "r")) == NULL) { - return 0; - } - /* - * For security reasons, the .k5login file must be owned either by - * the user himself, or by root. Otherwise, don't grant access. - */ - if (fstat(fileno(fp), &sbuf)) { - fclose(fp); - return 0; - } - if ((sbuf.st_uid != pwd->pw_uid) && sbuf.st_uid) { - fclose(fp); - return 0; - } - - /* check each line */ - - - if( !(linebuf = (char *) calloc (BUFSIZ, sizeof(char)))) return ENOMEM; - - if (!(buf_out = (char **) malloc( CHUNK * sizeof(char *)))) return ENOMEM; - - while ( fgets(linebuf, BUFSIZ, fp) != NULL) { - /* null-terminate the input string */ - linebuf[BUFSIZ-1] = '\0'; - newline = NULL; - /* nuke the newline if it exists */ - if ((newline = strchr(linebuf, '\n'))) - *newline = '\0'; - - buf_out[count] = linebuf; - count ++; - - if (count == (chunk_count * CHUNK -1)){ - chunk_count ++; - if (!(buf_out = (char **) realloc(buf_out, - chunk_count * CHUNK * sizeof(char *)))){ - return ENOMEM; - } - } - - /* clean up the rest of the line if necessary */ - if (!newline) - while (((gobble = getc(fp)) != EOF) && gobble != '\n'); - - if( !(linebuf = (char *) calloc (BUFSIZ, sizeof(char)))) return ENOMEM; - } - - buf_out[count] = NULL; - *princ_list = buf_out; - fclose(fp); - return 0; -} - void @@ -429,31 +337,29 @@ show_credential(context, cred, cc) krb5_ccache cc; { krb5_error_code retval; - char *name, *sname, *flags; + char *name = NULL, *sname = NULL, *defname = NULL, *flags; int first = 1; - krb5_principal princ; - char * defname; + krb5_principal princ = NULL; int show_flags =1; retval = krb5_unparse_name(context, cred->client, &name); if (retval) { com_err(prog_name, retval, _("while unparsing client name")); - return; + goto cleanup; } retval = krb5_unparse_name(context, cred->server, &sname); if (retval) { com_err(prog_name, retval, _("while unparsing server name")); - free(name); - return; + goto cleanup; } if ((retval = krb5_cc_get_principal(context, cc, &princ))) { com_err(prog_name, retval, _("while retrieving principal name")); - return; + goto cleanup; } if ((retval = krb5_unparse_name(context, princ, &defname))) { com_err(prog_name, retval, _("while unparsing principal name")); - return; + goto cleanup; } if (!cred->times.starttime) @@ -491,8 +397,12 @@ show_credential(context, cred, cc) } } putchar('\n'); + +cleanup: free(name); free(sname); + free(defname); + krb5_free_principal(context, princ); } /* Create a random string suitable for a filename extension. */ @@ -526,37 +436,26 @@ krb5_error_code krb5_ccache_overwrite(context, ccs, cct, primary_principal) krb5_principal primary_principal; { krb5_error_code retval=0; - krb5_principal temp_principal; + krb5_principal defprinc = NULL, princ; krb5_creds ** ccs_creds_arr = NULL; - int i=0; if (ks_ccache_is_initialized(context, ccs)) { - if ((retval = krb5_get_nonexp_tkts(context, ccs, &ccs_creds_arr))){ - return retval; - } - } - - if (ks_ccache_is_initialized(context, cct)) { - if ((retval = krb5_cc_get_principal(context, cct, &temp_principal))){ - return retval; - } - }else{ - temp_principal = primary_principal; + retval = krb5_get_nonexp_tkts(context, ccs, &ccs_creds_arr); + if (retval) + goto cleanup; } - if ((retval = krb5_cc_initialize(context, cct, temp_principal))){ - return retval; - } + retval = krb5_cc_get_principal(context, cct, &defprinc); + princ = (retval == 0) ? defprinc : primary_principal; + retval = krb5_cc_initialize(context, cct, princ); + if (retval) + goto cleanup; retval = krb5_store_all_creds(context, cct, ccs_creds_arr, NULL); - if (ccs_creds_arr){ - while (ccs_creds_arr[i]){ - krb5_free_creds(context, ccs_creds_arr[i]); - i++; - } - } - +cleanup: + free_creds_list(context, ccs_creds_arr); + krb5_free_principal(context, defprinc); return retval; } @@ -616,45 +515,40 @@ krb5_error_code krb5_ccache_filter (context, cc, prst) krb5_principal prst; { - int i=0; krb5_error_code retval=0; - krb5_principal temp_principal; + krb5_principal temp_principal = NULL; krb5_creds ** cc_creds_arr = NULL; const char * cc_name; krb5_boolean stored; - cc_name = krb5_cc_get_name(context, cc); + if (!ks_ccache_is_initialized(context, cc)) + return 0; - if (ks_ccache_is_initialized(context, cc)) { - if (auth_debug) { - fprintf(stderr,"putting cache %s through a filter for -z option\n", cc_name); - } + if (auth_debug) { + cc_name = krb5_cc_get_name(context, cc); + fprintf(stderr, "putting cache %s through a filter for -z option\n", + cc_name); + } - if ((retval = krb5_get_nonexp_tkts(context, cc, &cc_creds_arr))){ - return retval; - } + retval = krb5_get_nonexp_tkts(context, cc, &cc_creds_arr); + if (retval) + goto cleanup; - if ((retval = krb5_cc_get_principal(context, cc, &temp_principal))){ - return retval; - } + retval = krb5_cc_get_principal(context, cc, &temp_principal); + if (retval) + goto cleanup; - if ((retval = krb5_cc_initialize(context, cc, temp_principal))){ - return retval; - } + retval = krb5_cc_initialize(context, cc, temp_principal); + if (retval) + goto cleanup; - if ((retval = krb5_store_some_creds(context, cc, cc_creds_arr, - NULL, prst, &stored))){ - return retval; - } + retval = krb5_store_some_creds(context, cc, cc_creds_arr, NULL, prst, + &stored); - if (cc_creds_arr){ - while (cc_creds_arr[i]){ - krb5_free_creds(context, cc_creds_arr[i]); - i++; - } - } - } - return 0; +cleanup: + free_creds_list(context, cc_creds_arr); + krb5_free_principal(context, temp_principal); + return retval; } krb5_boolean krb5_find_princ_in_cred_list (context, creds_list, princ) @@ -688,17 +582,20 @@ krb5_error_code krb5_find_princ_in_cache (context, cc, princ, found) krb5_principal princ; krb5_boolean *found; { - krb5_error_code retval; + krb5_error_code retval = 0; krb5_creds ** creds_list = NULL; if (ks_ccache_is_initialized(context, cc)) { - if ((retval = krb5_get_nonexp_tkts(context, cc, &creds_list))){ - return retval; - } + retval = krb5_get_nonexp_tkts(context, cc, &creds_list); + if (retval) + goto cleanup; } *found = krb5_find_princ_in_cred_list(context, creds_list, princ); - return 0; + +cleanup: + free_creds_list(context, creds_list); + return retval; } krb5_boolean diff --git a/src/clients/ksu/heuristic.c b/src/clients/ksu/heuristic.c index 4f7280f..47baa78 100644 --- a/src/clients/ksu/heuristic.c +++ b/src/clients/ksu/heuristic.c @@ -156,28 +156,31 @@ filter(fp, cmd, k5users_list, k5users_filt_list) *k5users_filt_list = NULL; - if (! k5users_list){ + if (k5users_list == NULL) return 0; - } while(k5users_list[i]){ + free(out_cmd); + out_cmd = NULL; retval= k5users_lookup(fp, k5users_list[i], cmd, &found, &out_cmd); if (retval) - return retval; + goto cleanup; if (found == FALSE){ free (k5users_list[i]); k5users_list[i] = NULL; - if (out_cmd) gb_err = out_cmd; + if (out_cmd) { + gb_err = out_cmd; + out_cmd = NULL; + } } else found_count ++; i++; } - if (! (temp_filt_list = (char **) calloc(found_count +1, sizeof (char*)))) - return ENOMEM; + temp_filt_list = xcalloc(found_count + 1, sizeof(*temp_filt_list)); for(j= 0, k=0; j < i; j++ ) { if (k5users_list[j]){ @@ -191,7 +194,10 @@ filter(fp, cmd, k5users_list, k5users_filt_list) free (k5users_list); *k5users_filt_list = temp_filt_list; - return 0; + +cleanup: + free(out_cmd); + return retval; } krb5_error_code @@ -335,7 +341,7 @@ krb5_error_code get_closest_principal(context, plist, client, found) retval = krb5_parse_name(context, plist[i], &temp_client); if (retval) - return retval; + goto cleanup; pnelem = krb5_princ_size(context, temp_client); @@ -363,6 +369,7 @@ krb5_error_code get_closest_principal(context, plist, client, found) if(best_client){ if(krb5_princ_size(context, best_client) > krb5_princ_size(context, temp_client)){ + krb5_free_principal(context, best_client); best_client = temp_client; } }else @@ -375,9 +382,12 @@ krb5_error_code get_closest_principal(context, plist, client, found) if (best_client) { *found = TRUE; *client = best_client; + best_client = NULL; } - return 0; +cleanup: + krb5_free_principal(context, best_client); + return retval; } /**************************************************************** @@ -499,6 +509,7 @@ krb5_error_code find_princ_in_list (context, princ, plist, found) i++; } + free(princname); return 0; } @@ -534,11 +545,9 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, { princ_info princ_trials[10]; - krb5_principal cc_def_princ = NULL; - krb5_principal temp_client; - krb5_principal target_client; - krb5_principal source_client; - krb5_principal end_server; + krb5_principal cc_def_princ = NULL, temp_client = NULL; + krb5_principal target_client = NULL, source_client = NULL; + krb5_principal end_server = NULL; krb5_error_code retval; char ** aplist =NULL; krb5_boolean found = FALSE; @@ -555,54 +564,59 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, if (ks_ccache_is_initialized(context, cc_source)) { retval = krb5_cc_get_principal(context, cc_source, &cc_def_princ); if (retval) - return retval; + goto cleanup; } retval=krb5_parse_name(context, target_user, &target_client); if (retval) - return retval; + goto cleanup; retval=krb5_parse_name(context, source_user, &source_client); if (retval) - return retval; + goto cleanup; - if (source_uid == 0){ - if (target_uid != 0) - *client = target_client; /* this will be used to restrict - the cache copty */ - else { - if(cc_def_princ) - *client = cc_def_princ; - else - *client = target_client; + if (source_uid == 0) { + if (target_uid != 0) { + /* This will be used to restrict the cache copy. */ + *client = target_client; + target_client = NULL; + } else if (cc_def_princ != NULL) { + *client = cc_def_princ; + cc_def_princ = NULL; + } else { + *client = target_client; + target_client = NULL; } - if (auth_debug) printf(" GET_best_princ_for_target: via source_uid == 0\n"); - - return 0; + goto cleanup; } /* from here on, the code is for source_uid != 0 */ if (source_uid && (source_uid == target_uid)){ - if(cc_def_princ) + if (cc_def_princ != NULL) { *client = cc_def_princ; - else + cc_def_princ = NULL; + } else { *client = target_client; + target_client = NULL; + } if (auth_debug) printf("GET_best_princ_for_target: via source_uid == target_uid\n"); - return 0; + goto cleanup; } /* Become root, then target for looking at .k5login.*/ if (krb5_seteuid(0) || krb5_seteuid(target_uid) ) { - return errno; + retval = errno; + goto cleanup; } /* if .k5users and .k5login do not exist */ if (stat(k5login_path, &tb) && stat(k5users_path, &tb) ){ *client = target_client; + target_client = NULL; if (cmd) *path_out = NOT_AUTHORIZED; @@ -610,26 +624,25 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, if (auth_debug) printf(" GET_best_princ_for_target: via no auth files path\n"); - return 0; + goto cleanup; }else{ retval = get_authorized_princ_names(target_user, cmd, &aplist); if (retval) - return retval; + goto cleanup; /* .k5users or .k5login exist, but no authorization */ if ((!aplist) || (!aplist[0])) { *path_out = NOT_AUTHORIZED; if (auth_debug) printf("GET_best_princ_for_target: via empty auth files path\n"); - return 0; + goto cleanup; } } retval = krb5_sname_to_principal(context, hostname, NULL, KRB5_NT_SRV_HST, &end_server); if (retval) - return retval; - + goto cleanup; /* first see if default principal of the source cache * can get us in, then the target_user@realm, then the @@ -652,7 +665,7 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, retval= find_princ_in_list(context, princ_trials[i].p, aplist, &found); if (retval) - return retval; + goto cleanup; if (found == TRUE){ princ_trials[i].found = TRUE; @@ -661,12 +674,13 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, princ_trials[i].p, end_server, &found); if (retval) - return retval; + goto cleanup; if (found == TRUE){ - *client = princ_trials[i].p; + retval = krb5_copy_principal(context, princ_trials[i].p, + client); if (auth_debug) printf("GET_best_princ_for_target: via ticket file, choice #%d\n", i); - return 0; + goto cleanup; } } } @@ -679,21 +693,23 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, while (aplist[i]){ retval = krb5_parse_name(context, aplist[i], &temp_client); if (retval) - return retval; + goto cleanup; retval = find_either_ticket (context, cc_source, temp_client, end_server, &found); if (retval) - return retval; + goto cleanup; if (found == TRUE){ if (auth_debug) printf("GET_best_princ_for_target: via ticket file, choice: any ok ticket \n" ); *client = temp_client; - return 0; + temp_client = NULL; + goto cleanup; } krb5_free_principal(context, temp_client); + temp_client = NULL; i++; } @@ -704,11 +720,11 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, for (i=0; i < count; i ++){ if (princ_trials[i].found == TRUE){ - *client = princ_trials[i].p; + retval = krb5_copy_principal(context, princ_trials[i].p, client); if (auth_debug) printf("GET_best_princ_for_target: via prompt passwd list choice #%d \n",i); - return 0; + goto cleanup; } } @@ -718,7 +734,7 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, retval=krb5_copy_principal(context, princ_trials[i].p, &temp_client); if(retval) - return retval; + goto cleanup; /* get the client name that is the closest to the three princ in trials */ @@ -726,15 +742,15 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, retval=get_closest_principal(context, aplist, &temp_client, &found); if(retval) - return retval; + goto cleanup; if (found == TRUE){ *client = temp_client; + temp_client = NULL; if (auth_debug) printf("GET_best_princ_for_target: via prompt passwd list choice: approximation of princ in trials # %d \n",i); - return 0; + goto cleanup; } - krb5_free_principal(context, temp_client); } } @@ -745,5 +761,13 @@ krb5_error_code get_best_princ_for_target(context, source_uid, target_uid, printf( "GET_best_princ_for_target: out of luck, can't get appropriate default principal\n"); *path_out = NOT_AUTHORIZED; - return 0; + retval = 0; + +cleanup: + krb5_free_principal(context, cc_def_princ); + krb5_free_principal(context, target_client); + krb5_free_principal(context, source_client); + krb5_free_principal(context, temp_client); + krb5_free_principal(context, end_server); + return retval; } diff --git a/src/clients/ksu/krb_auth_su.c b/src/clients/ksu/krb_auth_su.c index fb848dc..ad9874e 100644 --- a/src/clients/ksu/krb_auth_su.c +++ b/src/clients/ksu/krb_auth_su.c @@ -42,33 +42,31 @@ krb5_boolean krb5_auth_check(context, client_pname, hostname, options, krb5_ccache cc; int *path_passwd; { - krb5_principal client; + krb5_principal client = NULL; krb5_verify_init_creds_opt vfy_opts; - krb5_creds tgt, tgtq; + krb5_creds tgt = { 0 }, tgtq = { 0 }; krb5_error_code retval =0; int got_it = 0; krb5_boolean zero_password; + krb5_boolean ok = FALSE; *path_passwd = 0; - memset(&tgtq, 0, sizeof(tgtq)); - memset(&tgt, 0, sizeof(tgt)); if ((retval= krb5_copy_principal(context, client_pname, &client))){ com_err(prog_name, retval, _("while copying client principal")); - return (FALSE) ; + goto cleanup; } if ((retval= krb5_copy_principal(context, client, &tgtq.client))){ com_err(prog_name, retval, _("while copying client principal")); - return (FALSE) ; + goto cleanup; } if ((retval = ksu_tgtname(context, krb5_princ_realm(context, client), krb5_princ_realm(context, client), &tgtq.server))){ com_err(prog_name, retval, _("while creating tgt for local realm")); - krb5_free_principal(context, client); - return (FALSE) ; + goto cleanup; } if (auth_debug){ dump_principal(context, "local tgt principal name", tgtq.server ); } @@ -82,7 +80,7 @@ krb5_boolean krb5_auth_check(context, client_pname, hostname, options, if ((retval != KRB5_CC_NOTFOUND) && (retval != KRB5KRB_AP_ERR_TKT_EXPIRED)){ com_err(prog_name, retval, _("while retrieving creds from cache")); - return (FALSE) ; + goto cleanup; } } else{ got_it = 1; @@ -93,7 +91,7 @@ krb5_boolean krb5_auth_check(context, client_pname, hostname, options, #ifdef GET_TGT_VIA_PASSWD if (krb5_seteuid(0)||krb5_seteuid(target_uid)) { com_err("ksu", errno, _("while switching to target uid")); - return FALSE; + goto cleanup; } @@ -107,19 +105,19 @@ krb5_boolean krb5_auth_check(context, client_pname, hostname, options, &tgt) == FALSE) { krb5_seteuid(0); - return FALSE; + goto cleanup; } *path_passwd = 1; if (krb5_seteuid(0)) { com_err("ksu", errno, _("while reclaiming root uid")); - return FALSE; + goto cleanup; } #else plain_dump_principal (context, client); fprintf(stderr, _("does not have any appropriate tickets in the cache.\n")); - return FALSE; + goto cleanup; #endif /* GET_TGT_VIA_PASSWD */ @@ -131,10 +129,16 @@ krb5_boolean krb5_auth_check(context, client_pname, hostname, options, &vfy_opts); if (retval) { com_err(prog_name, retval, _("while verifying ticket for server")); - return (FALSE); + goto cleanup; } - return (TRUE); + ok = TRUE; + +cleanup: + krb5_free_principal(context, client); + krb5_free_cred_contents(context, &tgt); + krb5_free_cred_contents(context, &tgtq); + return ok; } krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, @@ -145,11 +149,12 @@ krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, krb5_boolean *zero_password; krb5_creds *creds_out; { + krb5_boolean ok = FALSE; krb5_error_code code; - krb5_creds creds; + krb5_creds creds = { 0 }; krb5_timestamp now; unsigned int pwsize; - char password[255], *client_name, prompt[255]; + char password[255], prompt[255], *client_name = NULL; int result; *zero_password = FALSE; @@ -158,14 +163,14 @@ krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, if ((code = krb5_unparse_name(context, client, &client_name))) { com_err (prog_name, code, _("when unparsing name")); - return (FALSE); + goto cleanup; } memset(&creds, 0, sizeof(creds)); if ((code = krb5_timeofday(context, &now))) { com_err(prog_name, code, _("while getting time of day")); - return (FALSE); + goto cleanup; } result = snprintf(prompt, sizeof(prompt), _("Kerberos password for %s: "), @@ -174,7 +179,7 @@ krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, fprintf(stderr, _("principal name %s too long for internal buffer space\n"), client_name); - return FALSE; + goto cleanup; } pwsize = sizeof(password); @@ -183,13 +188,13 @@ krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, if (code ) { com_err(prog_name, code, _("while reading password for '%s'\n"), client_name); - return (FALSE); + goto cleanup; } if ( pwsize == 0) { fprintf(stderr, _("No password given\n")); *zero_password = TRUE; - return (FALSE); + goto cleanup; } code = krb5_get_init_creds_password(context, &creds, client, password, @@ -203,13 +208,19 @@ krb5_boolean ksu_get_tgt_via_passwd(context, client, options, zero_password, fprintf(stderr, _("%s: Password incorrect\n"), prog_name); else com_err(prog_name, code, _("while getting initial credentials")); - return (FALSE); + goto cleanup; } - if (creds_out != NULL) + if (creds_out != NULL) { *creds_out = creds; - else - krb5_free_cred_contents(context, &creds); - return (TRUE); + memset(&creds, 0, sizeof(creds)); + } + + ok = TRUE; + +cleanup: + krb5_free_cred_contents(context, &creds); + free(client_name); + return ok; } @@ -224,8 +235,10 @@ void dump_principal (context, str, p) if ((retval = krb5_unparse_name(context, p, &stname))) { fprintf(stderr, _(" %s while unparsing name\n"), error_message(retval)); + return; } fprintf(stderr, " %s: %s\n", str, stname); + free(stname); } void plain_dump_principal (context, p) @@ -240,72 +253,5 @@ void plain_dump_principal (context, p) error_message(retval)); } fprintf(stderr, "%s ", stname); -} - - -/********************************************************************** -returns the principal that is closest to client. plist contains -a principal list obtained from .k5login and parhaps .k5users file. -This routine gets called before getting the password for a tgt. -A principal is picked that has the best chance of getting in. - -**********************************************************************/ - - -krb5_error_code get_best_principal(context, plist, client) - krb5_context context; - char **plist; - krb5_principal *client; -{ - krb5_error_code retval =0; - krb5_principal temp_client, best_client = NULL; - - int i = 0, nelem; - - if (! plist ) return 0; - - nelem = krb5_princ_size(context, *client); - - while(plist[i]){ - - if ((retval = krb5_parse_name(context, plist[i], &temp_client))){ - return retval; - } - - if (data_eq(*krb5_princ_realm(context, *client), - *krb5_princ_realm(context, temp_client))) { - - if (nelem && - krb5_princ_size(context, *client) > 0 && - krb5_princ_size(context, temp_client) > 0) { - krb5_data *p1 = - krb5_princ_component(context, *client, 0); - krb5_data *p2 = - krb5_princ_component(context, temp_client, 0); - - if (data_eq(*p1, *p2)) { - - if (auth_debug){ - fprintf(stderr, - "get_best_principal: compare with %s\n", - plist[i]); - } - - if(best_client){ - if(krb5_princ_size(context, best_client) > - krb5_princ_size(context, temp_client)){ - best_client = temp_client; - } - }else{ - best_client = temp_client; - } - } - } - - } - i++; - } - - if (best_client) *client = best_client; - return 0; + free(stname); } diff --git a/src/clients/ksu/ksu.h b/src/clients/ksu/ksu.h index 66fb4bc..32ce11c 100644 --- a/src/clients/ksu/ksu.h +++ b/src/clients/ksu/ksu.h @@ -92,9 +92,6 @@ extern void plain_dump_principal extern krb5_error_code krb5_parse_lifetime (char *, long *); -extern krb5_error_code get_best_principal -(krb5_context, char **, krb5_principal *); - /* ccache.c */ extern krb5_error_code krb5_ccache_copy (krb5_context, krb5_ccache, krb5_principal, krb5_ccache, @@ -117,9 +114,6 @@ extern krb5_error_code krb5_check_exp extern char *flags_string (krb5_creds *); -extern krb5_error_code krb5_get_login_princ -(const char *, char ***); - extern void show_credential (krb5_context, krb5_creds *, krb5_ccache); diff --git a/src/clients/ksu/main.c b/src/clients/ksu/main.c index 931f054..a7cb7ed 100644 --- a/src/clients/ksu/main.c +++ b/src/clients/ksu/main.c @@ -1003,7 +1003,7 @@ resolve_target_cache(krb5_context context, krb5_principal princ, if (retval) { com_err(prog_name, retval, _("while generating part of the target ccache name")); - return retval; + goto cleanup; } if (asprintf(&ccname, "%s.%s", target, sym) < 0) { retval = ENOMEM; @@ -1015,6 +1015,7 @@ resolve_target_cache(krb5_context context, krb5_principal princ, free(sym); } while (ks_ccache_name_is_initialized(context, ccname)); retval = krb5_cc_resolve(context, ccname, &ccache); + free(ccname); } else { /* Look for a cache in the collection that we can reuse. */ retval = krb5_cc_cache_match(context, princ, &ccache); diff --git a/src/kadmin/cli/keytab.c b/src/kadmin/cli/keytab.c index b0c8378..8a59188 100644 --- a/src/kadmin/cli/keytab.c +++ b/src/kadmin/cli/keytab.c @@ -363,7 +363,7 @@ remove_principal(char *keytab_str, krb5_keytab keytab, { krb5_principal princ = NULL; krb5_keytab_entry entry; - krb5_kt_cursor cursor; + krb5_kt_cursor cursor = NULL; enum { UNDEF, SPEC, HIGH, ALL, OLD } mode; int code, did_something; krb5_kvno kvno; @@ -443,6 +443,7 @@ remove_principal(char *keytab_str, krb5_keytab keytab, _("while temporarily ending keytab scan")); goto cleanup; } + cursor = NULL; code = krb5_kt_remove_entry(context, keytab, &entry); if (code != 0) { com_err(whoami, code, _("while deleting entry from keytab")); @@ -471,6 +472,7 @@ remove_principal(char *keytab_str, krb5_keytab keytab, com_err(whoami, code, _("while ending keytab scan")); goto cleanup; } + cursor = NULL; /* * If !did_someting then mode must be OLD or we would have @@ -483,6 +485,8 @@ remove_principal(char *keytab_str, krb5_keytab keytab, } cleanup: + if (cursor != NULL) + (void)krb5_kt_end_seq_get(context, keytab, &cursor); krb5_free_principal(context, princ); } diff --git a/src/kadmin/ktutil/ktutil.c b/src/kadmin/ktutil/ktutil.c index 92d7023..782c728 100644 --- a/src/kadmin/ktutil/ktutil.c +++ b/src/kadmin/ktutil/ktutil.c @@ -263,6 +263,7 @@ void ktutil_list(argc, argv) buf, sizeof(buf)))) { com_err(argv[0], retval, _("While converting enctype to string")); + free(pname); return; } printf(" (%s) ", buf); diff --git a/src/kprop/kpropd.c b/src/kprop/kpropd.c index 0d141d4..e0500d4 100644 --- a/src/kprop/kpropd.c +++ b/src/kprop/kpropd.c @@ -1299,19 +1299,20 @@ static krb5_boolean authorized_principal(krb5_context context, krb5_principal p, krb5_enctype auth_etype) { - char *name, *ptr, buf[1024]; + krb5_boolean ok = FALSE; + char *name = NULL, *ptr, buf[1024]; krb5_error_code retval; - FILE *acl_file; + FILE *acl_file = NULL; int end; krb5_enctype acl_etype; retval = krb5_unparse_name(context, p, &name); if (retval) - return FALSE; + goto cleanup; acl_file = fopen(acl_file_name, "r"); if (acl_file == NULL) - return FALSE; + goto cleanup; while (!feof(acl_file)) { if (!fgets(buf, sizeof(buf), acl_file)) @@ -1341,14 +1342,16 @@ authorized_principal(krb5_context context, krb5_principal p, (acl_etype != auth_etype))) continue; - free(name); - fclose(acl_file); - return TRUE; + ok = TRUE; + goto cleanup; } } + +cleanup: free(name); - fclose(acl_file); - return FALSE; + if (acl_file != NULL) + fclose(acl_file); + return ok; } static void diff --git a/src/lib/gssapi/krb5/export_cred.c b/src/lib/gssapi/krb5/export_cred.c index 96a408c..bf5cede 100644 --- a/src/lib/gssapi/krb5/export_cred.c +++ b/src/lib/gssapi/krb5/export_cred.c @@ -447,8 +447,10 @@ krb5_gss_export_cred(OM_uint32 *minor_status, gss_cred_id_t cred_handle, /* Validate and lock cred_handle. */ status = krb5_gss_validate_cred_1(minor_status, cred_handle, context); - if (status != GSS_S_COMPLETE) + if (status != GSS_S_COMPLETE) { + krb5_free_context(context); return status; + } cred = (krb5_gss_cred_id_t)cred_handle; if (json_kgcred(context, cred, &jcred)) diff --git a/src/lib/gssapi/krb5/val_cred.c b/src/lib/gssapi/krb5/val_cred.c index cb1cb93..87a46cd 100644 --- a/src/lib/gssapi/krb5/val_cred.c +++ b/src/lib/gssapi/krb5/val_cred.c @@ -35,6 +35,7 @@ krb5_gss_validate_cred_1(OM_uint32 *minor_status, gss_cred_id_t cred_handle, krb5_gss_cred_id_t cred; krb5_error_code code; krb5_principal princ; + krb5_boolean same; cred = (krb5_gss_cred_id_t) cred_handle; k5_mutex_lock(&cred->lock); @@ -45,12 +46,13 @@ krb5_gss_validate_cred_1(OM_uint32 *minor_status, gss_cred_id_t cred_handle, *minor_status = code; return(GSS_S_DEFECTIVE_CREDENTIAL); } - if (!krb5_principal_compare(context, princ, cred->name->princ)) { + same = krb5_principal_compare(context, princ, cred->name->princ); + (void)krb5_free_principal(context, princ); + if (!same) { k5_mutex_unlock(&cred->lock); *minor_status = KG_CCACHE_NOMATCH; return(GSS_S_DEFECTIVE_CREDENTIAL); } - (void)krb5_free_principal(context, princ); } *minor_status = 0; return GSS_S_COMPLETE; diff --git a/src/lib/kadm5/srv/server_kdb.c b/src/lib/kadm5/srv/server_kdb.c index 2ec80a0..4efcaf9 100644 --- a/src/lib/kadm5/srv/server_kdb.c +++ b/src/lib/kadm5/srv/server_kdb.c @@ -67,11 +67,10 @@ krb5_error_code kdb_init_master(kadm5_server_handle_t handle, if (ret) goto done; - if ((ret = krb5_db_fetch_mkey_list(handle->context, master_princ, - &master_keyblock))) { + ret = krb5_db_fetch_mkey_list(handle->context, master_princ, + &master_keyblock); + if (ret) krb5_db_fini(handle->context); - return (ret); - } done: if (r == NULL) diff --git a/src/lib/krb5/ccache/ccfns.c b/src/lib/krb5/ccache/ccfns.c index e0eb39a..9b755f0 100644 --- a/src/lib/krb5/ccache/ccfns.c +++ b/src/lib/krb5/ccache/ccfns.c @@ -198,18 +198,18 @@ k5_build_conf_principals(krb5_context context, krb5_ccache id, if (principal) { ret = krb5_unparse_name(context, principal, &pname); if (ret) - return ret; + goto cleanup; } ret = krb5_build_principal(context, &cred->server, sizeof(conf_realm) - 1, conf_realm, conf_name, name, pname, (char *)NULL); - krb5_free_unparsed_name(context, pname); - if (ret) { - krb5_free_principal(context, client); - return ret; - } + if (ret) + goto cleanup; ret = krb5_copy_principal(context, client, &cred->client); + +cleanup: + krb5_free_unparsed_name(context, pname); krb5_free_principal(context, client); return ret; } diff --git a/src/lib/krb5/keytab/kt_file.c b/src/lib/krb5/keytab/kt_file.c index f3ea28c..8fd1505 100644 --- a/src/lib/krb5/keytab/kt_file.c +++ b/src/lib/krb5/keytab/kt_file.c @@ -456,15 +456,16 @@ krb5_ktfile_start_seq_get(krb5_context context, krb5_keytab id, krb5_kt_cursor * return ENOMEM; } *fileoff = KTSTARTOFF(id); - *cursorp = (krb5_kt_cursor)fileoff; KTITERS(id)++; if (KTITERS(id) == 0) { /* Wrapped?! */ KTITERS(id)--; KTUNLOCK(id); + free(fileoff); k5_setmsg(context, KRB5_KT_IOERR, "Too many keytab iterators active"); return KRB5_KT_IOERR; /* XXX */ } + *cursorp = (krb5_kt_cursor)fileoff; KTUNLOCK(id); return 0; diff --git a/src/plugins/kdb/ldap/libkdb_ldap/ldap_realm.c b/src/plugins/kdb/ldap/libkdb_ldap/ldap_realm.c index 3daf524..2ce7245 100644 --- a/src/plugins/kdb/ldap/libkdb_ldap/ldap_realm.c +++ b/src/plugins/kdb/ldap/libkdb_ldap/ldap_realm.c @@ -271,16 +271,18 @@ krb5_ldap_delete_realm (krb5_context context, char *lrealm) for (ent = ldap_first_entry (ld, result); ent != NULL; ent = ldap_next_entry (ld, ent)) { if ((values = ldap_get_values(ld, ent, "krbPrincipalName")) != NULL) { - for (i = 0; values[i] != NULL; ++i) { + for (i = 0; values[i] != NULL && !st; ++i) { krb5_parse_name(context, values[i], &principal); if (principal_in_realm_2(principal, lrealm) == 0) { st=krb5_ldap_delete_principal(context, principal); - if (st && st != KRB5_KDB_NOENTRY) - goto cleanup; + if (st == KRB5_KDB_NOENTRY) + st = 0; } krb5_free_principal(context, principal); } ldap_value_free(values); + if (st) + goto cleanup; } } } -- 2.33.0
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