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341 lines
10 KiB
C
341 lines
10 KiB
C
/*-
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* Copyright (c) 2005 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Copyright (c) 1998 - 2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1998 - 2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <gssapi/gssapi.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "mech_switch.h"
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#include "utils.h"
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static const char *
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calling_error(OM_uint32 v)
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{
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static const char *msgs[] = {
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NULL, /* 0 */
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"A required input parameter could not be read.", /* */
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"A required output parameter could not be written.", /* */
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"A parameter was malformed"
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};
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v >>= GSS_C_CALLING_ERROR_OFFSET;
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if (v == 0)
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return "";
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else if (v >= sizeof(msgs)/sizeof(*msgs))
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return "unknown calling error";
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else
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return msgs[v];
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}
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static const char *
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routine_error(OM_uint32 v)
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{
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static const char *msgs[] = {
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"Function completed successfully", /* 0 */
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"An unsupported mechanism was requested",
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"An invalid name was supplied",
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"A supplied name was of an unsupported type",
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"Incorrect channel bindings were supplied",
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"An invalid status code was supplied",
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"A token had an invalid MIC",
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"No credentials were supplied, "
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"or the credentials were unavailable or inaccessible.",
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"No context has been established",
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"A token was invalid",
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"A credential was invalid",
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"The referenced credentials have expired",
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"The context has expired",
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"Miscellaneous failure (see text)",
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"The quality-of-protection requested could not be provide",
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"The operation is forbidden by local security policy",
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"The operation or option is not available",
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"The requested credential element already exists",
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"The provided name was not a mechanism name.",
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};
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v >>= GSS_C_ROUTINE_ERROR_OFFSET;
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if (v >= sizeof(msgs)/sizeof(*msgs))
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return "unknown routine error";
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else
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return msgs[v];
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}
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static const char *
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supplementary_error(OM_uint32 v)
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{
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static const char *msgs[] = {
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"normal completion",
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"continuation call to routine required",
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"duplicate per-message token detected",
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"timed-out per-message token detected",
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"reordered (early) per-message token detected",
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"skipped predecessor token(s) detected"
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};
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v >>= GSS_C_SUPPLEMENTARY_OFFSET;
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if (v >= sizeof(msgs)/sizeof(*msgs))
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return "unknown routine error";
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else
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return msgs[v];
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}
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#if defined(__sparc64__) || defined(__arm__) || defined(__mips__)
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/*
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* These platforms don't support TLS on FreeBSD - threads will just
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* have to step on each other's error values for now.
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*/
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#define __thread
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#endif
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struct mg_thread_ctx {
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gss_OID mech;
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OM_uint32 maj_stat;
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OM_uint32 min_stat;
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gss_buffer_desc maj_error;
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gss_buffer_desc min_error;
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};
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static __thread struct mg_thread_ctx last_error_context;
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static OM_uint32
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_gss_mg_get_error(const gss_OID mech, OM_uint32 type,
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OM_uint32 value, gss_buffer_t string)
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{
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struct mg_thread_ctx *mg;
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mg = &last_error_context;
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if (mech != NULL && gss_oid_equal(mg->mech, mech) == 0)
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return (GSS_S_BAD_STATUS);
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switch (type) {
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case GSS_C_GSS_CODE: {
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if (value != mg->maj_stat || mg->maj_error.length == 0)
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break;
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string->value = malloc(mg->maj_error.length);
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string->length = mg->maj_error.length;
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memcpy(string->value, mg->maj_error.value,
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mg->maj_error.length);
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return (GSS_S_COMPLETE);
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}
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case GSS_C_MECH_CODE: {
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if (value != mg->min_stat || mg->min_error.length == 0)
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break;
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string->value = malloc(mg->min_error.length);
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string->length = mg->min_error.length;
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memcpy(string->value, mg->min_error.value,
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mg->min_error.length);
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return (GSS_S_COMPLETE);
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}
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}
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string->value = NULL;
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string->length = 0;
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return (GSS_S_BAD_STATUS);
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}
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void
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_gss_mg_error(struct _gss_mech_switch *m, OM_uint32 maj, OM_uint32 min)
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{
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OM_uint32 major_status, minor_status;
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OM_uint32 message_content;
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struct mg_thread_ctx *mg;
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mg = &last_error_context;
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gss_release_buffer(&minor_status, &mg->maj_error);
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gss_release_buffer(&minor_status, &mg->min_error);
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mg->mech = &m->gm_mech_oid;
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mg->maj_stat = maj;
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mg->min_stat = min;
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major_status = m->gm_display_status(&minor_status,
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maj,
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GSS_C_GSS_CODE,
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&m->gm_mech_oid,
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&message_content,
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&mg->maj_error);
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if (GSS_ERROR(major_status)) {
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mg->maj_error.value = NULL;
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mg->maj_error.length = 0;
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}
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major_status = m->gm_display_status(&minor_status,
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min,
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GSS_C_MECH_CODE,
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&m->gm_mech_oid,
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&message_content,
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&mg->min_error);
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if (GSS_ERROR(major_status)) {
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mg->min_error.value = NULL;
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mg->min_error.length = 0;
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}
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}
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OM_uint32
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gss_display_status(OM_uint32 *minor_status,
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OM_uint32 status_value,
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int status_type,
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const gss_OID mech_type,
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OM_uint32 *message_content,
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gss_buffer_t status_string)
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{
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OM_uint32 major_status;
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_gss_buffer_zero(status_string);
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*message_content = 0;
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major_status = _gss_mg_get_error(mech_type, status_type,
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status_value, status_string);
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if (major_status == GSS_S_COMPLETE) {
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*message_content = 0;
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*minor_status = 0;
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return (GSS_S_COMPLETE);
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}
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*minor_status = 0;
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switch (status_type) {
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case GSS_C_GSS_CODE: {
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char *buf;
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if (GSS_SUPPLEMENTARY_INFO(status_value))
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asprintf(&buf, "%s", supplementary_error(
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GSS_SUPPLEMENTARY_INFO(status_value)));
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else
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asprintf (&buf, "%s %s",
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calling_error(GSS_CALLING_ERROR(status_value)),
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routine_error(GSS_ROUTINE_ERROR(status_value)));
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if (buf == NULL)
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break;
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status_string->length = strlen(buf);
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status_string->value = buf;
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return (GSS_S_COMPLETE);
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}
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case GSS_C_MECH_CODE: {
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OM_uint32 maj_junk, min_junk;
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gss_buffer_desc oid;
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char *buf;
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maj_junk = gss_oid_to_str(&min_junk, mech_type, &oid);
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if (maj_junk != GSS_S_COMPLETE) {
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oid.value = strdup("unknown");
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oid.length = 7;
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}
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asprintf (&buf, "unknown mech-code %lu for mech %.*s",
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(unsigned long)status_value,
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(int)oid.length, (char *)oid.value);
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if (maj_junk == GSS_S_COMPLETE)
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gss_release_buffer(&min_junk, &oid);
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if (buf == NULL)
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break;
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status_string->length = strlen(buf);
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status_string->value = buf;
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return (GSS_S_COMPLETE);
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}
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}
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_gss_buffer_zero(status_string);
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return (GSS_S_BAD_STATUS);
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}
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