353 lines
12 KiB
C
353 lines
12 KiB
C
/*
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* Copyright (c) 2015 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#include <corecrypto/ccdigest.h>
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#include <corecrypto/cchmac.h>
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#include <corecrypto/ccsha1.h>
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#include <corecrypto/ccdes.h>
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#include <corecrypto/ccaes.h>
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#include <corecrypto/ccpad.h>
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/*
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* GSS-API things from gssapi.h
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*/
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/*
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* Copyright 1993 by OpenVision Technologies, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appears in all copies and
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* that both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of OpenVision not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. OpenVision makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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typedef uint32_t OM_uint32;
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#define GSS_S_COMPLETE 0
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/*
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* Some "helper" definitions to make the status code macros obvious.
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* From gssapi.h:
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*/
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#define GSS_C_CALLING_ERROR_OFFSET 24
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#define GSS_C_ROUTINE_ERROR_OFFSET 16
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#define GSS_C_SUPPLEMENTARY_OFFSET 0
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#define GSS_C_CALLING_ERROR_MASK ((OM_uint32) 0377ul)
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#define GSS_C_ROUTINE_ERROR_MASK ((OM_uint32) 0377ul)
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#define GSS_C_SUPPLEMENTARY_MASK ((OM_uint32) 0177777ul)
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/*
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* The macros that test status codes for error conditions. Note that the
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* GSS_ERROR() macro has changed slightly from the V1 GSSAPI so that it now
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* evaluates its argument only once.
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*/
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#define GSS_CALLING_ERROR(x) \
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((x) & (GSS_C_CALLING_ERROR_MASK << GSS_C_CALLING_ERROR_OFFSET))
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#define GSS_ROUTINE_ERROR(x) \
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((x) & (GSS_C_ROUTINE_ERROR_MASK << GSS_C_ROUTINE_ERROR_OFFSET))
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#define GSS_SUPPLEMENTARY_INFO(x) \
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((x) & (GSS_C_SUPPLEMENTARY_MASK << GSS_C_SUPPLEMENTARY_OFFSET))
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#define GSS_ERROR(x) \
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((x) & ((GSS_C_CALLING_ERROR_MASK << GSS_C_CALLING_ERROR_OFFSET) | \
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(GSS_C_ROUTINE_ERROR_MASK << GSS_C_ROUTINE_ERROR_OFFSET)))
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/*
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* Calling errors:
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*/
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#define GSS_S_CALL_INACCESSIBLE_READ \
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(((OM_uint32) 1ul) << GSS_C_CALLING_ERROR_OFFSET)
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#define GSS_S_CALL_INACCESSIBLE_WRITE \
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(((OM_uint32) 2ul) << GSS_C_CALLING_ERROR_OFFSET)
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#define GSS_S_CALL_BAD_STRUCTURE \
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(((OM_uint32) 3ul) << GSS_C_CALLING_ERROR_OFFSET)
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/*
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* Routine errors:
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*/
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#define GSS_S_BAD_MECH (((OM_uint32) 1ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_NAME (((OM_uint32) 2ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_NAMETYPE (((OM_uint32) 3ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_BINDINGS (((OM_uint32) 4ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_STATUS (((OM_uint32) 5ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_SIG (((OM_uint32) 6ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_NO_CRED (((OM_uint32) 7ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_NO_CONTEXT (((OM_uint32) 8ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_DEFECTIVE_TOKEN (((OM_uint32) 9ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_DEFECTIVE_CREDENTIAL \
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(((OM_uint32) 10ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_CREDENTIALS_EXPIRED \
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(((OM_uint32) 11ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_CONTEXT_EXPIRED \
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(((OM_uint32) 12ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_FAILURE (((OM_uint32) 13ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_BAD_QOP (((OM_uint32) 14ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_UNAUTHORIZED (((OM_uint32) 15ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_UNAVAILABLE (((OM_uint32) 16ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_DUPLICATE_ELEMENT \
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(((OM_uint32) 17ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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#define GSS_S_NAME_NOT_MN \
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(((OM_uint32) 18ul) << GSS_C_ROUTINE_ERROR_OFFSET)
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/*
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* Supplementary info bits:
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*/
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#define GSS_S_CONTINUE_NEEDED (1 << (GSS_C_SUPPLEMENTARY_OFFSET + 0))
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#define GSS_S_DUPLICATE_TOKEN (1 << (GSS_C_SUPPLEMENTARY_OFFSET + 1))
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#define GSS_S_OLD_TOKEN (1 << (GSS_C_SUPPLEMENTARY_OFFSET + 2))
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#define GSS_S_UNSEQ_TOKEN (1 << (GSS_C_SUPPLEMENTARY_OFFSET + 3))
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#define GSS_S_GAP_TOKEN (1 << (GSS_C_SUPPLEMENTARY_OFFSET + 4))
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#define GSS_C_QOP_DEFAULT 0
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/* end of gssapi.h */
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/*
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* The following data structures are genenrated from lucid.x in the gssd project
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* and must be kept in sync with that project. This is a more memory efficient
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* representation of the gss_kerb5_lucid_context_v1_t defined in gssapi_krb5.h
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*/
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struct lucid_key {
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uint32_t etype;
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struct {
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uint32_t key_len;
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uint8_t *key_val;
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} key;
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};
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typedef struct lucid_key lucid_key;
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struct key_data_1964 {
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uint32_t sign_alg;
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uint32_t seal_alg;
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};
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typedef struct key_data_1964 key_data_1964;
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struct key_data_4121 {
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uint32_t acceptor_subkey;
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};
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typedef struct key_data_4121 key_data_4121;
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struct lucid_protocol {
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uint32_t proto;
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union {
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key_data_1964 data_1964;
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key_data_4121 data_4121;
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} lucid_protocol_u;
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};
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typedef struct lucid_protocol lucid_protocol;
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struct lucid_context {
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uint32_t vers;
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uint32_t initiate;
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uint32_t endtime;
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uint64_t send_seq;
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uint64_t recv_seq;
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lucid_protocol key_data;
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lucid_key ctx_key;
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};
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typedef struct lucid_context lucid_context;
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/* end of lucid.x generated data structures */
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typedef struct lucid_context *lucid_context_t;
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/*
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* Mask for determining the returned structure version.
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* See example below for usage.
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*/
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typedef struct lucid_context_version {
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uint32_t version;
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/* Structure version number */
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} *lucid_context_version_t;
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typedef enum etypes {
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DES3_CBC_SHA1_KD = 16,
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AES128_CTS_HMAC_SHA1_96 = 17,
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AES256_CTS_HMAC_SHA1_96 = 18,
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} etypes;
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#define KRB5_USAGE_ACCEPTOR_SEAL 22
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#define KRB5_USAGE_ACCEPTOR_SIGN 23
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#define KRB5_USAGE_INITIATOR_SEAL 24
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#define KRB5_USAGE_INITIATOR_SIGN 25
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#define KRB5_USAGE_LEN 5
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#define GSS_SND 0
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#define GSS_RCV 1
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#define GSS_C_QOP_REVERSE 0x80000000 /* Pseudo QOP value to use as input to gss_krb5_unwrap to allow Sender to unwrap */
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typedef struct krb5_key {
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void *key_val;
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size_t key_len;
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} krb5_key_t;
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/*
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* Key schedule is the cbc state for encryption and decryption.
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* For DES3 we always use the session key from the lucid context,
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* and in that case Ekey and Ikey will point to the session key.
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*/
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struct key_schedule {
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cccbc_ctx *enc;
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cccbc_ctx *dec;
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krb5_key_t ikeys[2]; /* Drived integrity key (same length context key); */
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};
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/*
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* Crypto context that supports AES and DES3 etypes
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* All supported encryption types use hmac with SHA1
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* All are CBC encryption types
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* des3-cbc-sha1 -- 7
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* des3-dbc-sha1-kd -- 16 ???
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* aes128-cts-hmac-sha1-96 -- 17
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* aes256-cts-hmac-sha1-96 -- 18
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*/
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typedef struct crypto_ctx {
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uint32_t etype;
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uint32_t flags;
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size_t mpad; /* Message padding */
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lck_mtx_t lock;
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lucid_context_t gss_ctx; /* Back pointer to lucid context */
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void *key; /* Points to session key from lucid context */
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const struct ccdigest_info *di;
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const struct ccmode_cbc *enc_mode;
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const struct ccmode_cbc *dec_mode;
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struct key_schedule ks;
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uint32_t digest_size;
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uint32_t keylen;
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krb5_key_t ckeys[2]; /* Derived checksum key. Same as key for DES3 */
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} *crypto_ctx_t;
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#define CRYPTO_KS_ALLOCED 0x00001
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#define CRYPTO_CTS_ENABLE 0x00002
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#define CRYPTO_MAX_DIGSET_SIZE 20 // 160 bits for DES3_CBC_SHA1_KD
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typedef struct gss_ctx_id_desc {
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lucid_context gss_lucid_ctx;
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struct crypto_ctx gss_cryptor;
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} *gss_ctx_id_t;
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typedef struct gss_buffer_desc_struct {
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size_t length;
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void *value;
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} gss_buffer_desc, *gss_buffer_t;
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uint32_t
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gss_release_buffer(uint32_t *, /* minor_status */
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gss_buffer_t);
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/* Per message interfaces for kerberos gss mech in the kernel */
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typedef uint32_t gss_qop_t;
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uint32_t
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gss_krb5_get_mic_mbuf(uint32_t *, /* minor_status */
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gss_ctx_id_t, /* context_handle */
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gss_qop_t, /* qop_req */
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mbuf_t, /* message mbuf */
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size_t, /* offest */
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size_t, /* length */
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gss_buffer_t /* message_token */
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);
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uint32_t
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gss_krb5_get_mic(uint32_t *, /* minor_status */
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gss_ctx_id_t, /* context_handle */
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gss_qop_t, /* qop_req */
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gss_buffer_t, /* message buffer */
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gss_buffer_t /* message_token */
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);
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uint32_t
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gss_krb5_verify_mic_mbuf(uint32_t *, /* minor_status */
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gss_ctx_id_t, /* context_handle */
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mbuf_t, /* message_buffer */
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size_t, /* offset */
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size_t, /* length */
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gss_buffer_t, /* message_token */
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gss_qop_t * /* qop_state */
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);
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uint32_t
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gss_krb5_wrap_mbuf(uint32_t *, /* minor_status */
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gss_ctx_id_t, /* context_handle */
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int, /* conf_req_flag */
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gss_qop_t, /* qop_req */
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mbuf_t *, /* input/output message_buffer */
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size_t, /* offset */
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size_t, /* length */
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int * /* conf_state */
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);
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uint32_t
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gss_krb5_unwrap_mbuf(uint32_t *, /* minor_status */
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gss_ctx_id_t, /* context_handle */
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mbuf_t *, /* input/output message_buffer */
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size_t, /* offset */
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size_t, /* length */
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int *, /* conf_state */
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gss_qop_t * /* qop state */
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);
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void gss_krb5_destroy_context(gss_ctx_id_t);
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gss_ctx_id_t gss_krb5_make_context(void *, uint32_t);
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void gss_krb5_mech_init(void);
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int corecrypto_available(void);
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errno_t gss_normalize_mbuf(mbuf_t, size_t, size_t *, mbuf_t *, mbuf_t *, int);
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mbuf_t gss_join_mbuf(mbuf_t, mbuf_t, mbuf_t);
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typedef struct hmac_ctx_struct {
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size_t keylen;
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uint8_t *key;
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ccdigest_ctx_t di_ctx;
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} hmac_ctx, hmac_ctx_t[1];
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void hmac_init(const struct ccdigest_info *, hmac_ctx_t, size_t, void *);
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void hmac_update(const struct ccdigest_info *, hmac_ctx_t, size_t, void *);
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void hmac_final(const struct ccdigest_info *, hmac_ctx_t, uint8_t *);
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void printmbuf(const char *, mbuf_t, uint32_t, uint32_t);
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void printgbuf(const char *, gss_buffer_t);
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