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cm_pmeth.c

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1/* $OpenBSD: cm_pmeth.c,v 1.8 2014/07/11 08:44:48 jsing Exp $ */-
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL-
3 * project 2010.-
4 */-
5/* ====================================================================-
6 * Copyright (c) 2010 The OpenSSL Project. All rights reserved.-
7 *-
8 * Redistribution and use in source and binary forms, with or without-
9 * modification, are permitted provided that the following conditions-
10 * are met:-
11 *-
12 * 1. Redistributions of source code must retain the above copyright-
13 * notice, this list of conditions and the following disclaimer.-
14 *-
15 * 2. Redistributions in binary form must reproduce the above copyright-
16 * notice, this list of conditions and the following disclaimer in-
17 * the documentation and/or other materials provided with the-
18 * distribution.-
19 *-
20 * 3. All advertising materials mentioning features or use of this-
21 * software must display the following acknowledgment:-
22 * "This product includes software developed by the OpenSSL Project-
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"-
24 *-
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
26 * endorse or promote products derived from this software without-
27 * prior written permission. For written permission, please contact-
28 * licensing@OpenSSL.org.-
29 *-
30 * 5. Products derived from this software may not be called "OpenSSL"-
31 * nor may "OpenSSL" appear in their names without prior written-
32 * permission of the OpenSSL Project.-
33 *-
34 * 6. Redistributions of any form whatsoever must retain the following-
35 * acknowledgment:-
36 * "This product includes software developed by the OpenSSL Project-
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"-
38 *-
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
50 * OF THE POSSIBILITY OF SUCH DAMAGE.-
51 * ====================================================================-
52 */-
53-
54#include <stdio.h>-
55#include <string.h>-
56-
57#include <openssl/cmac.h>-
58#include <openssl/evp.h>-
59#include <openssl/x509.h>-
60#include <openssl/x509v3.h>-
61-
62#include "evp_locl.h"-
63-
64/* The context structure and "key" is simply a CMAC_CTX */-
65-
66static int-
67pkey_cmac_init(EVP_PKEY_CTX *ctx)-
68{-
69 ctx->data = CMAC_CTX_new();-
70 if (!ctx->data)
!ctx->dataDescription
TRUEnever evaluated
FALSEnever evaluated
0
71 return 0;
never executed: return 0;
0
72 ctx->keygen_info_count = 0;-
73 return 1;
never executed: return 1;
0
74}-
75-
76static int-
77pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)-
78{-
79 if (!pkey_cmac_init(dst))
!pkey_cmac_init(dst)Description
TRUEnever evaluated
FALSEnever evaluated
0
80 return 0;
never executed: return 0;
0
81 if (!CMAC_CTX_copy(dst->data, src->data))
!CMAC_CTX_copy...ta, src->data)Description
TRUEnever evaluated
FALSEnever evaluated
0
82 return 0;
never executed: return 0;
0
83 return 1;
never executed: return 1;
0
84}-
85-
86static void-
87pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)-
88{-
89 CMAC_CTX_free(ctx->data);-
90}
never executed: end of block
0
91-
92static int-
93pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)-
94{-
95 CMAC_CTX *cmkey = CMAC_CTX_new();-
96 CMAC_CTX *cmctx = ctx->data;-
97-
98 if (!cmkey)
!cmkeyDescription
TRUEnever evaluated
FALSEnever evaluated
0
99 return 0;
never executed: return 0;
0
100 if (!CMAC_CTX_copy(cmkey, cmctx)) {
!CMAC_CTX_copy(cmkey, cmctx)Description
TRUEnever evaluated
FALSEnever evaluated
0
101 CMAC_CTX_free(cmkey);-
102 return 0;
never executed: return 0;
0
103 }-
104 EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);-
105-
106 return 1;
never executed: return 1;
0
107}-
108-
109static int-
110int_update(EVP_MD_CTX *ctx, const void *data, size_t count)-
111{-
112 if (!CMAC_Update(ctx->pctx->data, data, count))
!CMAC_Update(c..., data, count)Description
TRUEnever evaluated
FALSEnever evaluated
0
113 return 0;
never executed: return 0;
0
114 return 1;
never executed: return 1;
0
115}-
116-
117static int-
118cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)-
119{-
120 EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);-
121 mctx->update = int_update;-
122 return 1;
never executed: return 1;
0
123}-
124-
125static int-
126cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,-
127 EVP_MD_CTX *mctx)-
128{-
129 return CMAC_Final(ctx->data, sig, siglen);
never executed: return CMAC_Final(ctx->data, sig, siglen);
0
130}-
131-
132static int-
133pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)-
134{-
135 CMAC_CTX *cmctx = ctx->data;-
136-
137 switch (type) {-
138 case EVP_PKEY_CTRL_SET_MAC_KEY:
never executed: case 6:
0
139 if (!p2 || p1 < 0)
!p2Description
TRUEnever evaluated
FALSEnever evaluated
p1 < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
140 return 0;
never executed: return 0;
0
141 if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
!CMAC_Init(cmc... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
142 return 0;
never executed: return 0;
0
143 break;
never executed: break;
0
144-
145 case EVP_PKEY_CTRL_CIPHER:
never executed: case 12:
0
146 if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
!CMAC_Init(cmc..., ctx->engine)Description
TRUEnever evaluated
FALSEnever evaluated
0
147 return 0;
never executed: return 0;
0
148 break;
never executed: break;
0
149-
150 case EVP_PKEY_CTRL_MD:
never executed: case 1:
0
151 if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
ctx->pkeyDescription
TRUEnever evaluated
FALSEnever evaluated
!CMAC_CTX_copy...key->pkey.ptr)Description
TRUEnever evaluated
FALSEnever evaluated
0
152 (CMAC_CTX *)ctx->pkey->pkey.ptr))
!CMAC_CTX_copy...key->pkey.ptr)Description
TRUEnever evaluated
FALSEnever evaluated
0
153 return 0;
never executed: return 0;
0
154 if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
!CMAC_Init(cmc... ((void *)0) )Description
TRUEnever evaluated
FALSEnever evaluated
0
155 return 0;
never executed: return 0;
0
156 break;
never executed: break;
0
157-
158 default:
never executed: default:
0
159 return -2;
never executed: return -2;
0
160 }-
161 return 1;
never executed: return 1;
0
162}-
163-
164static int-
165pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value)-
166{-
167 if (!value)
!valueDescription
TRUEnever evaluated
FALSEnever evaluated
0
168 return 0;
never executed: return 0;
0
169 if (!strcmp(type, "key")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "key" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_..."key" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
170 void *p = (void *)value;-
171 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
never executed: return pkey_cmac_ctrl(ctx, 6, strlen(p), p);
0
172 strlen(p), p);
never executed: return pkey_cmac_ctrl(ctx, 6, strlen(p), p);
0
173 }-
174 if (!strcmp(type, "cipher")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "cipher" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_...pher" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
175 const EVP_CIPHER *c;-
176-
177 c = EVP_get_cipherbyname(value);-
178 if (!c)
!cDescription
TRUEnever evaluated
FALSEnever evaluated
0
179 return 0;
never executed: return 0;
0
180 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
never executed: return pkey_cmac_ctrl(ctx, 12, -1, (void *)c);
0
181 }-
182 if (!strcmp(type, "hexkey")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "hexkey" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_...xkey" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
183 unsigned char *key;-
184 int r;-
185 long keylen;-
186-
187 key = string_to_hex(value, &keylen);-
188 if (!key)
!keyDescription
TRUEnever evaluated
FALSEnever evaluated
0
189 return 0;
never executed: return 0;
0
190 r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);-
191 free(key);-
192 return r;
never executed: return r;
0
193 }-
194-
195 return -2;
never executed: return -2;
0
196}-
197-
198const EVP_PKEY_METHOD cmac_pkey_meth = {-
199 .pkey_id = EVP_PKEY_CMAC,-
200 .flags = EVP_PKEY_FLAG_SIGCTX_CUSTOM,-
201-
202 .init = pkey_cmac_init,-
203 .copy = pkey_cmac_copy,-
204 .cleanup = pkey_cmac_cleanup,-
205-
206 .keygen = pkey_cmac_keygen,-
207-
208 .signctx_init = cmac_signctx_init,-
209 .signctx = cmac_signctx,-
210-
211 .ctrl = pkey_cmac_ctrl,-
212 .ctrl_str = pkey_cmac_ctrl_str-
213};-
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