Line data Source code
1 : /*
2 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
3 : * 2007.
4 : */
5 : /* ====================================================================
6 : * Copyright (c) 2007 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 : * This product includes cryptographic software written by Eric Young
54 : * (eay@cryptsoft.com). This product includes software written by Tim
55 : * Hudson (tjh@cryptsoft.com).
56 : *
57 : */
58 :
59 : #include <stdio.h>
60 : #include "cryptlib.h"
61 : #include <openssl/x509.h>
62 : #include <openssl/x509v3.h>
63 : #include <openssl/evp.h>
64 : #include <openssl/hmac.h>
65 : #include "evp_locl.h"
66 :
67 : /* HMAC pkey context structure */
68 :
69 : typedef struct {
70 : const EVP_MD *md; /* MD for HMAC use */
71 : ASN1_OCTET_STRING ktmp; /* Temp storage for key */
72 : HMAC_CTX ctx;
73 : } HMAC_PKEY_CTX;
74 :
75 27946 : static int pkey_hmac_init(EVP_PKEY_CTX *ctx)
76 : {
77 : HMAC_PKEY_CTX *hctx;
78 27946 : hctx = OPENSSL_malloc(sizeof(HMAC_PKEY_CTX));
79 27946 : if (!hctx)
80 : return 0;
81 27946 : hctx->md = NULL;
82 27946 : hctx->ktmp.data = NULL;
83 27946 : hctx->ktmp.length = 0;
84 27946 : hctx->ktmp.flags = 0;
85 27946 : hctx->ktmp.type = V_ASN1_OCTET_STRING;
86 27946 : HMAC_CTX_init(&hctx->ctx);
87 :
88 27946 : ctx->data = hctx;
89 27946 : ctx->keygen_info_count = 0;
90 :
91 27946 : return 1;
92 : }
93 :
94 20596 : static int pkey_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
95 : {
96 : HMAC_PKEY_CTX *sctx, *dctx;
97 20596 : if (!pkey_hmac_init(dst))
98 : return 0;
99 20596 : sctx = src->data;
100 20596 : dctx = dst->data;
101 20596 : dctx->md = sctx->md;
102 20596 : HMAC_CTX_init(&dctx->ctx);
103 20596 : if (!HMAC_CTX_copy(&dctx->ctx, &sctx->ctx))
104 : return 0;
105 20596 : if (sctx->ktmp.data) {
106 0 : if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
107 : sctx->ktmp.data, sctx->ktmp.length))
108 : return 0;
109 : }
110 : return 1;
111 : }
112 :
113 27946 : static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx)
114 : {
115 27946 : HMAC_PKEY_CTX *hctx = ctx->data;
116 27946 : HMAC_CTX_cleanup(&hctx->ctx);
117 27946 : if (hctx->ktmp.data) {
118 3675 : if (hctx->ktmp.length)
119 3675 : OPENSSL_cleanse(hctx->ktmp.data, hctx->ktmp.length);
120 3675 : OPENSSL_free(hctx->ktmp.data);
121 3675 : hctx->ktmp.data = NULL;
122 : }
123 27946 : OPENSSL_free(hctx);
124 27946 : }
125 :
126 3675 : static int pkey_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
127 : {
128 : ASN1_OCTET_STRING *hkey = NULL;
129 3675 : HMAC_PKEY_CTX *hctx = ctx->data;
130 3675 : if (!hctx->ktmp.data)
131 : return 0;
132 3675 : hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
133 3675 : if (!hkey)
134 : return 0;
135 3675 : EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
136 :
137 3675 : return 1;
138 : }
139 :
140 27219 : static int int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
141 : {
142 27219 : HMAC_PKEY_CTX *hctx = ctx->pctx->data;
143 27219 : if (!HMAC_Update(&hctx->ctx, data, count))
144 : return 0;
145 27219 : return 1;
146 : }
147 :
148 3675 : static int hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
149 : {
150 3675 : HMAC_PKEY_CTX *hctx = ctx->data;
151 3675 : HMAC_CTX_set_flags(&hctx->ctx, mctx->flags & ~EVP_MD_CTX_FLAG_NO_INIT);
152 3675 : EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
153 3675 : mctx->update = int_update;
154 3675 : return 1;
155 : }
156 :
157 10298 : static int hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
158 : EVP_MD_CTX *mctx)
159 : {
160 : unsigned int hlen;
161 10298 : HMAC_PKEY_CTX *hctx = ctx->data;
162 10298 : int l = EVP_MD_CTX_size(mctx);
163 :
164 10298 : if (l < 0)
165 : return 0;
166 10298 : *siglen = l;
167 10298 : if (!sig)
168 : return 1;
169 :
170 10298 : if (!HMAC_Final(&hctx->ctx, sig, &hlen))
171 : return 0;
172 10298 : *siglen = (size_t)hlen;
173 10298 : return 1;
174 : }
175 :
176 11025 : static int pkey_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
177 : {
178 11025 : HMAC_PKEY_CTX *hctx = ctx->data;
179 : ASN1_OCTET_STRING *key;
180 11025 : switch (type) {
181 :
182 : case EVP_PKEY_CTRL_SET_MAC_KEY:
183 3675 : if ((!p2 && p1 > 0) || (p1 < -1))
184 : return 0;
185 3675 : if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
186 : return 0;
187 : break;
188 :
189 : case EVP_PKEY_CTRL_MD:
190 3675 : hctx->md = p2;
191 3675 : break;
192 :
193 : case EVP_PKEY_CTRL_DIGESTINIT:
194 3675 : key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr;
195 3675 : if (!HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md,
196 : ctx->engine))
197 : return 0;
198 : break;
199 :
200 : default:
201 : return -2;
202 :
203 : }
204 : return 1;
205 : }
206 :
207 0 : static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
208 : const char *type, const char *value)
209 : {
210 0 : if (!value) {
211 : return 0;
212 : }
213 0 : if (!strcmp(type, "key")) {
214 : void *p = (void *)value;
215 0 : return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
216 : }
217 0 : if (!strcmp(type, "hexkey")) {
218 : unsigned char *key;
219 : int r;
220 : long keylen;
221 0 : key = string_to_hex(value, &keylen);
222 0 : if (!key)
223 : return 0;
224 0 : r = pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
225 0 : OPENSSL_free(key);
226 0 : return r;
227 : }
228 : return -2;
229 : }
230 :
231 : const EVP_PKEY_METHOD hmac_pkey_meth = {
232 : EVP_PKEY_HMAC,
233 : 0,
234 : pkey_hmac_init,
235 : pkey_hmac_copy,
236 : pkey_hmac_cleanup,
237 :
238 : 0, 0,
239 :
240 : 0,
241 : pkey_hmac_keygen,
242 :
243 : 0, 0,
244 :
245 : 0, 0,
246 :
247 : 0, 0,
248 :
249 : hmac_signctx_init,
250 : hmac_signctx,
251 :
252 : 0, 0,
253 :
254 : 0, 0,
255 :
256 : 0, 0,
257 :
258 : 0, 0,
259 :
260 : pkey_hmac_ctrl,
261 : pkey_hmac_ctrl_str
262 : };
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