diff options
Diffstat (limited to 'crypto/heimdal/kadmin/server.c')
| -rw-r--r-- | crypto/heimdal/kadmin/server.c | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/crypto/heimdal/kadmin/server.c b/crypto/heimdal/kadmin/server.c new file mode 100644 index 0000000..d491e46 --- /dev/null +++ b/crypto/heimdal/kadmin/server.c @@ -0,0 +1,506 @@ +/* + * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "kadmin_locl.h" +#include <krb5-private.h> + +RCSID("$Id: server.c,v 1.24 2000/01/02 03:58:45 assar Exp $"); + +static kadm5_ret_t +kadmind_dispatch(void *kadm_handle, krb5_boolean initial, + krb5_data *in, krb5_data *out) +{ + kadm5_ret_t ret; + int32_t cmd, mask, tmp; + kadm5_server_context *context = kadm_handle; + char client[128], name[128], name2[128]; + char *op = ""; + krb5_principal princ, princ2; + kadm5_principal_ent_rec ent; + char *password, *exp; + krb5_keyblock *new_keys; + int n_keys; + char **princs; + int n_princs; + krb5_storage *sp; + + krb5_unparse_name_fixed(context->context, context->caller, + client, sizeof(client)); + + sp = krb5_storage_from_data(in); + + krb5_ret_int32(sp, &cmd); + switch(cmd){ + case kadm_get:{ + op = "GET"; + ret = krb5_ret_principal(sp, &princ); + if(ret) + goto fail; + ret = krb5_ret_int32(sp, &mask); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + krb5_unparse_name_fixed(context->context, princ, name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_GET); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + ret = kadm5_get_principal(kadm_handle, princ, &ent, mask); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + if(ret == 0){ + kadm5_store_principal_ent(sp, &ent); + kadm5_free_principal_ent(kadm_handle, &ent); + } + krb5_free_principal(context->context, princ); + break; + } + case kadm_delete:{ + op = "DELETE"; + ret = krb5_ret_principal(sp, &princ); + if(ret) + goto fail; + krb5_unparse_name_fixed(context->context, princ, name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_DELETE); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + ret = kadm5_delete_principal(kadm_handle, princ); + krb5_free_principal(context->context, princ); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + break; + } + case kadm_create:{ + op = "CREATE"; + ret = kadm5_ret_principal_ent(sp, &ent); + if(ret) + goto fail; + ret = krb5_ret_int32(sp, &mask); + if(ret){ + kadm5_free_principal_ent(context->context, &ent); + goto fail; + } + ret = krb5_ret_string(sp, &password); + if(ret){ + kadm5_free_principal_ent(context->context, &ent); + goto fail; + } + krb5_unparse_name_fixed(context->context, ent.principal, + name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_ADD); + if(ret){ + kadm5_free_principal_ent(context->context, &ent); + memset(password, 0, strlen(password)); + free(password); + goto fail; + } + ret = kadm5_create_principal(kadm_handle, &ent, + mask, password); + kadm5_free_principal_ent(kadm_handle, &ent); + memset(password, 0, strlen(password)); + free(password); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + break; + } + case kadm_modify:{ + op = "MODIFY"; + ret = kadm5_ret_principal_ent(sp, &ent); + if(ret) + goto fail; + ret = krb5_ret_int32(sp, &mask); + if(ret){ + kadm5_free_principal_ent(context, &ent); + goto fail; + } + krb5_unparse_name_fixed(context->context, ent.principal, + name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_MODIFY); + if(ret){ + kadm5_free_principal_ent(context, &ent); + goto fail; + } + ret = kadm5_modify_principal(kadm_handle, &ent, mask); + kadm5_free_principal_ent(kadm_handle, &ent); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + break; + } + case kadm_rename:{ + op = "RENAME"; + ret = krb5_ret_principal(sp, &princ); + if(ret) + goto fail; + ret = krb5_ret_principal(sp, &princ2); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + krb5_unparse_name_fixed(context->context, princ, name, sizeof(name)); + krb5_unparse_name_fixed(context->context, princ2, name2, sizeof(name2)); + krb5_warnx(context->context, "%s: %s %s -> %s", + client, op, name, name2); + ret = _kadm5_acl_check_permission(context, + KADM5_PRIV_ADD|KADM5_PRIV_DELETE); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + ret = kadm5_rename_principal(kadm_handle, princ, princ2); + krb5_free_principal(context->context, princ); + krb5_free_principal(context->context, princ2); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + break; + } + case kadm_chpass:{ + op = "CHPASS"; + ret = krb5_ret_principal(sp, &princ); + if(ret) + goto fail; + ret = krb5_ret_string(sp, &password); + if(ret){ + krb5_free_principal(context->context, princ); + goto fail; + } + krb5_unparse_name_fixed(context->context, princ, name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + + /* + * The change is allowed if at least one of: + * a) it's for the principal him/herself and this was an initial ticket + * b) the user is on the CPW ACL. + */ + + if (initial + && krb5_principal_compare (context->context, context->caller, + princ)) + ret = 0; + else + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_CPW); + + if(ret) { + krb5_free_principal(context->context, princ); + goto fail; + } + ret = kadm5_chpass_principal(kadm_handle, princ, password); + krb5_free_principal(context->context, princ); + memset(password, 0, strlen(password)); + free(password); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + break; + } + case kadm_randkey:{ + op = "RANDKEY"; + ret = krb5_ret_principal(sp, &princ); + if(ret) + goto fail; + krb5_unparse_name_fixed(context->context, princ, name, sizeof(name)); + krb5_warnx(context->context, "%s: %s %s", client, op, name); + /* + * The change is allowed if at least one of: + * a) it's for the principal him/herself and this was an initial ticket + * b) the user is on the CPW ACL. + */ + + if (initial + && krb5_principal_compare (context->context, context->caller, + princ)) + ret = 0; + else + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_CPW); + + if(ret) { + krb5_free_principal(context->context, princ); + goto fail; + } + ret = kadm5_randkey_principal(kadm_handle, princ, + &new_keys, &n_keys); + krb5_free_principal(context->context, princ); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + if(ret == 0){ + int i; + krb5_store_int32(sp, n_keys); + for(i = 0; i < n_keys; i++){ + krb5_store_keyblock(sp, new_keys[i]); + krb5_free_keyblock_contents(context->context, &new_keys[i]); + } + } + break; + } + case kadm_get_privs:{ + ret = kadm5_get_privs(kadm_handle, &mask); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + if(ret == 0) + krb5_store_int32(sp, mask); + break; + } + case kadm_get_princs:{ + op = "LIST"; + ret = krb5_ret_int32(sp, &tmp); + if(ret) + goto fail; + if(tmp){ + ret = krb5_ret_string(sp, &exp); + if(ret) + goto fail; + }else + exp = NULL; + krb5_warnx(context->context, "%s: %s %s", client, op, exp ? exp : "*"); + ret = _kadm5_acl_check_permission(context, KADM5_PRIV_LIST); + if(ret){ + free(exp); + goto fail; + } + ret = kadm5_get_principals(kadm_handle, exp, &princs, &n_princs); + free(exp); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, ret); + if(ret == 0){ + int i; + krb5_store_int32(sp, n_princs); + for(i = 0; i < n_princs; i++) + krb5_store_string(sp, princs[i]); + kadm5_free_name_list(kadm_handle, princs, &n_princs); + } + break; + } + default: + krb5_warnx(context->context, "%s: UNKNOWN OP %d", client, cmd); + krb5_storage_free(sp); + sp = krb5_storage_emem(); + krb5_store_int32(sp, KADM5_FAILURE); + break; + } + krb5_storage_to_data(sp, out); + krb5_storage_free(sp); + return 0; +fail: + krb5_warn(context->context, ret, "%s", op); + sp->seek(sp, 0, SEEK_SET); + krb5_store_int32(sp, ret); + krb5_storage_to_data(sp, out); + krb5_storage_free(sp); + return 0; +} + +static void +v5_loop (krb5_context context, + krb5_auth_context ac, + krb5_boolean initial, + void *kadm_handle, + int fd) +{ + krb5_error_code ret; + ssize_t n; + unsigned long len; + u_char tmp[4]; + struct iovec iov[2]; + krb5_data in, out, msg, reply; + + for (;;) { + n = krb5_net_read(context, &fd, tmp, 4); + if (n < 0) + krb5_err (context, 1, errno, "krb5_net_read"); + if (n == 0) + exit (0); + _krb5_get_int (tmp, &len, 4); + + ret = krb5_data_alloc(&in, len); + if (ret) + krb5_err (context, 1, ret, "krb5_data_alloc"); + + n = krb5_net_read(context, &fd, in.data, in.length); + if (n == 0) + exit (0); + if(n < 0) + krb5_errx(context, 1, "read error: %d", errno); + ret = krb5_rd_priv(context, ac, &in, &out, NULL); + if (ret) + krb5_err(context, 1, ret, "krb5_rd_priv"); + krb5_data_free(&in); + kadmind_dispatch(kadm_handle, initial, &out, &msg); + krb5_data_free(&out); + ret = krb5_mk_priv(context, ac, &msg, &reply, NULL); + krb5_data_free(&msg); + if(ret) + krb5_err(context, 1, ret, "krb5_mk_priv"); + + _krb5_put_int(tmp, reply.length, 4); + + iov[0].iov_base = tmp; + iov[0].iov_len = 4; + iov[1].iov_base = reply.data; + iov[1].iov_len = reply.length; + n = writev(fd, iov, 2); + krb5_data_free(&reply); + if(n < 0) + krb5_err(context, 1, errno, "writev"); + if(n < iov[0].iov_len + iov[1].iov_len) + krb5_errx(context, 1, "short write"); + } +} + +static krb5_boolean +match_appl_version(void *data, const char *appl_version) +{ + unsigned minor; + if(sscanf(appl_version, "KADM0.%u", &minor) != 1) + return 0; + *(unsigned*)data = minor; + return 1; +} + +static void +handle_v5(krb5_context context, + krb5_auth_context ac, + krb5_keytab keytab, + int len, + int fd) +{ + krb5_error_code ret; + u_char version[sizeof(KRB5_SENDAUTH_VERSION)]; + krb5_ticket *ticket; + krb5_principal server; + char *client; + void *kadm_handle; + ssize_t n; + krb5_boolean initial; + + unsigned kadm_version; + kadm5_config_params realm_params; + + if (len != sizeof(KRB5_SENDAUTH_VERSION)) + krb5_errx(context, 1, "bad sendauth len %d", len); + n = krb5_net_read(context, &fd, version, len); + if (n < 0) + krb5_err (context, 1, errno, "reading sendauth version"); + if (n == 0) + krb5_errx (context, 1, "EOF reading sendauth version"); + if(memcmp(version, KRB5_SENDAUTH_VERSION, len) != 0) + krb5_errx(context, 1, "bad sendauth version %.8s", version); + + ret = krb5_parse_name(context, KADM5_ADMIN_SERVICE, &server); + if (ret) + krb5_err (context, 1, ret, "krb5_parse_name %s", KADM5_ADMIN_SERVICE); + ret = krb5_recvauth_match_version(context, &ac, &fd, + match_appl_version, &kadm_version, + server, KRB5_RECVAUTH_IGNORE_VERSION, + keytab, &ticket); + if(ret == KRB5_KT_NOTFOUND) { + char *name; + krb5_unparse_name(context, server, &name); + krb5_errx(context, 1, "krb5_recvauth: %s (%s)", + krb5_get_err_text(context, ret), + name); + } + krb5_free_principal(context, server); + + if(ret) + krb5_err(context, 1, ret, "krb5_recvauth"); + + memset(&realm_params, 0, sizeof(realm_params)); + + if(kadm_version == 1) { + krb5_data enc_data, params; + ret = krb5_read_message(context, &fd, &enc_data); + ret = krb5_rd_priv(context, ac, &enc_data, ¶ms, NULL); + krb5_data_free(&enc_data); + _kadm5_unmarshal_params(context, ¶ms, &realm_params); + } + + initial = ticket->ticket.flags.initial; + ret = krb5_unparse_name(context, ticket->client, &client); + if (ret) + krb5_err (context, 1, ret, "krb5_unparse_name"); + krb5_free_ticket (context, ticket); + ret = kadm5_init_with_password_ctx(context, + client, + NULL, + KADM5_ADMIN_SERVICE, + &realm_params, + 0, 0, + &kadm_handle); + if(ret) + krb5_err (context, 1, ret, "kadm5_init_with_password_ctx"); + v5_loop (context, ac, initial, kadm_handle, fd); +} + +krb5_error_code +kadmind_loop(krb5_context context, + krb5_auth_context ac, + krb5_keytab keytab, + int fd) +{ + unsigned char tmp[4]; + ssize_t n; + unsigned long len; + + n = krb5_net_read(context, &fd, tmp, 4); + if(n == 0) + exit(0); + if(n < 0) + krb5_errx(context, 1, "read error: %d", errno); + _krb5_get_int(tmp, &len, 4); + if(len > 0xffff && (len & 0xffff) == ('K' << 8) + 'A') { + len >>= 16; +#ifdef KRB4 + handle_v4(context, len, fd); +#else + krb5_errx(context, 1, "packet appears to be version 4"); +#endif + } else { + handle_v5(context, ac, keytab, len, fd); + } + return 0; +} |
