diff options
Diffstat (limited to 'crypto/openssh/gss-serv.c')
| -rw-r--r-- | crypto/openssh/gss-serv.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/crypto/openssh/gss-serv.c b/crypto/openssh/gss-serv.c deleted file mode 100644 index e8191a8..0000000 --- a/crypto/openssh/gss-serv.c +++ /dev/null @@ -1,316 +0,0 @@ -/* $OpenBSD: gss-serv.c,v 1.20 2006/08/03 03:34:42 deraadt Exp $ */ - -/* - * Copyright (c) 2001-2003 Simon Wilkinson. 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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 "includes.h" - -#ifdef GSSAPI - -#include <sys/types.h> - -#include <stdarg.h> -#include <string.h> -#include <unistd.h> - -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" -#include "hostfile.h" -#include "auth.h" -#include "log.h" -#include "channels.h" -#include "session.h" -#include "misc.h" - -#include "ssh-gss.h" - -static ssh_gssapi_client gssapi_client = - { GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER, - GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL}}; - -ssh_gssapi_mech gssapi_null_mech = - { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL}; - -#ifdef KRB5 -extern ssh_gssapi_mech gssapi_kerberos_mech; -#endif - -ssh_gssapi_mech* supported_mechs[]= { -#ifdef KRB5 - &gssapi_kerberos_mech, -#endif - &gssapi_null_mech, -}; - -/* Unprivileged */ -void -ssh_gssapi_supported_oids(gss_OID_set *oidset) -{ - int i = 0; - OM_uint32 min_status; - int present; - gss_OID_set supported; - - gss_create_empty_oid_set(&min_status, oidset); - gss_indicate_mechs(&min_status, &supported); - - while (supported_mechs[i]->name != NULL) { - if (GSS_ERROR(gss_test_oid_set_member(&min_status, - &supported_mechs[i]->oid, supported, &present))) - present = 0; - if (present) - gss_add_oid_set_member(&min_status, - &supported_mechs[i]->oid, oidset); - i++; - } - - gss_release_oid_set(&min_status, &supported); -} - - -/* Wrapper around accept_sec_context - * Requires that the context contains: - * oid - * credentials (from ssh_gssapi_acquire_cred) - */ -/* Privileged */ -OM_uint32 -ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *recv_tok, - gss_buffer_desc *send_tok, OM_uint32 *flags) -{ - OM_uint32 status; - gss_OID mech; - - ctx->major = gss_accept_sec_context(&ctx->minor, - &ctx->context, ctx->creds, recv_tok, - GSS_C_NO_CHANNEL_BINDINGS, &ctx->client, &mech, - send_tok, flags, NULL, &ctx->client_creds); - - if (GSS_ERROR(ctx->major)) - ssh_gssapi_error(ctx); - - if (ctx->client_creds) - debug("Received some client credentials"); - else - debug("Got no client credentials"); - - status = ctx->major; - - /* Now, if we're complete and we have the right flags, then - * we flag the user as also having been authenticated - */ - - if (((flags == NULL) || ((*flags & GSS_C_MUTUAL_FLAG) && - (*flags & GSS_C_INTEG_FLAG))) && (ctx->major == GSS_S_COMPLETE)) { - if (ssh_gssapi_getclient(ctx, &gssapi_client)) - fatal("Couldn't convert client name"); - } - - return (status); -} - -/* - * This parses an exported name, extracting the mechanism specific portion - * to use for ACL checking. It verifies that the name belongs the mechanism - * originally selected. - */ -static OM_uint32 -ssh_gssapi_parse_ename(Gssctxt *ctx, gss_buffer_t ename, gss_buffer_t name) -{ - u_char *tok; - OM_uint32 offset; - OM_uint32 oidl; - - tok = ename->value; - - /* - * Check that ename is long enough for all of the fixed length - * header, and that the initial ID bytes are correct - */ - - if (ename->length < 6 || memcmp(tok, "\x04\x01", 2) != 0) - return GSS_S_FAILURE; - - /* - * Extract the OID, and check it. Here GSSAPI breaks with tradition - * and does use the OID type and length bytes. To confuse things - * there are two lengths - the first including these, and the - * second without. - */ - - oidl = get_u16(tok+2); /* length including next two bytes */ - oidl = oidl-2; /* turn it into the _real_ length of the variable OID */ - - /* - * Check the BER encoding for correct type and length, that the - * string is long enough and that the OID matches that in our context - */ - if (tok[4] != 0x06 || tok[5] != oidl || - ename->length < oidl+6 || - !ssh_gssapi_check_oid(ctx, tok+6, oidl)) - return GSS_S_FAILURE; - - offset = oidl+6; - - if (ename->length < offset+4) - return GSS_S_FAILURE; - - name->length = get_u32(tok+offset); - offset += 4; - - if (ename->length < offset+name->length) - return GSS_S_FAILURE; - - name->value = xmalloc(name->length+1); - memcpy(name->value, tok+offset, name->length); - ((char *)name->value)[name->length] = 0; - - return GSS_S_COMPLETE; -} - -/* Extract the client details from a given context. This can only reliably - * be called once for a context */ - -/* Privileged (called from accept_secure_ctx) */ -OM_uint32 -ssh_gssapi_getclient(Gssctxt *ctx, ssh_gssapi_client *client) -{ - int i = 0; - - gss_buffer_desc ename; - - client->mech = NULL; - - while (supported_mechs[i]->name != NULL) { - if (supported_mechs[i]->oid.length == ctx->oid->length && - (memcmp(supported_mechs[i]->oid.elements, - ctx->oid->elements, ctx->oid->length) == 0)) - client->mech = supported_mechs[i]; - i++; - } - - if (client->mech == NULL) - return GSS_S_FAILURE; - - if ((ctx->major = gss_display_name(&ctx->minor, ctx->client, - &client->displayname, NULL))) { - ssh_gssapi_error(ctx); - return (ctx->major); - } - - if ((ctx->major = gss_export_name(&ctx->minor, ctx->client, - &ename))) { - ssh_gssapi_error(ctx); - return (ctx->major); - } - - if ((ctx->major = ssh_gssapi_parse_ename(ctx,&ename, - &client->exportedname))) { - return (ctx->major); - } - - /* We can't copy this structure, so we just move the pointer to it */ - client->creds = ctx->client_creds; - ctx->client_creds = GSS_C_NO_CREDENTIAL; - return (ctx->major); -} - -/* As user - called on fatal/exit */ -void -ssh_gssapi_cleanup_creds(void) -{ - if (gssapi_client.store.filename != NULL) { - /* Unlink probably isn't sufficient */ - debug("removing gssapi cred file\"%s\"", - gssapi_client.store.filename); - unlink(gssapi_client.store.filename); - } -} - -/* As user */ -void -ssh_gssapi_storecreds(void) -{ - if (gssapi_client.mech && gssapi_client.mech->storecreds) { - (*gssapi_client.mech->storecreds)(&gssapi_client); - } else - debug("ssh_gssapi_storecreds: Not a GSSAPI mechanism"); -} - -/* This allows GSSAPI methods to do things to the childs environment based - * on the passed authentication process and credentials. - */ -/* As user */ -void -ssh_gssapi_do_child(char ***envp, u_int *envsizep) -{ - - if (gssapi_client.store.envvar != NULL && - gssapi_client.store.envval != NULL) { - debug("Setting %s to %s", gssapi_client.store.envvar, - gssapi_client.store.envval); - child_set_env(envp, envsizep, gssapi_client.store.envvar, - gssapi_client.store.envval); - } -} - -/* Privileged */ -int -ssh_gssapi_userok(char *user) -{ - OM_uint32 lmin; - - if (gssapi_client.exportedname.length == 0 || - gssapi_client.exportedname.value == NULL) { - debug("No suitable client data"); - return 0; - } - if (gssapi_client.mech && gssapi_client.mech->userok) - if ((*gssapi_client.mech->userok)(&gssapi_client, user)) - return 1; - else { - /* Destroy delegated credentials if userok fails */ - gss_release_buffer(&lmin, &gssapi_client.displayname); - gss_release_buffer(&lmin, &gssapi_client.exportedname); - gss_release_cred(&lmin, &gssapi_client.creds); - memset(&gssapi_client, 0, sizeof(ssh_gssapi_client)); - return 0; - } - else - debug("ssh_gssapi_userok: Unknown GSSAPI mechanism"); - return (0); -} - -/* Privileged */ -OM_uint32 -ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) -{ - ctx->major = gss_verify_mic(&ctx->minor, ctx->context, - gssbuf, gssmic, NULL); - - return (ctx->major); -} - -#endif |
