1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2010 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/x509.h>
61 #include <openssl/x509v3.h>
62 #include <openssl/evp.h>
63 #include <openssl/cmac.h>
66 /* The context structure and "key" is simply a CMAC_CTX */
68 static int pkey_cmac_init(EVP_PKEY_CTX *ctx)
70 ctx->data = CMAC_CTX_new();
73 ctx->keygen_info_count = 0;
77 static int pkey_cmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
79 if (!pkey_cmac_init(dst))
81 if (!CMAC_CTX_copy(dst->data, src->data))
86 static void pkey_cmac_cleanup(EVP_PKEY_CTX *ctx)
88 CMAC_CTX_free(ctx->data);
91 static int pkey_cmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
93 CMAC_CTX *cmkey = CMAC_CTX_new();
94 CMAC_CTX *cmctx = ctx->data;
97 if (!CMAC_CTX_copy(cmkey, cmctx))
102 EVP_PKEY_assign(pkey, EVP_PKEY_CMAC, cmkey);
107 static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count)
109 if (!CMAC_Update(ctx->pctx->data, data, count))
114 static int cmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
116 EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
117 mctx->update = int_update;
121 static int cmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
124 return CMAC_Final(ctx->data, sig, siglen);
127 static int pkey_cmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
129 CMAC_CTX *cmctx = ctx->data;
133 case EVP_PKEY_CTRL_SET_MAC_KEY:
136 if (!CMAC_Init(cmctx, p2, p1, NULL, NULL))
140 case EVP_PKEY_CTRL_CIPHER:
141 if (!CMAC_Init(cmctx, NULL, 0, p2, ctx->engine))
145 case EVP_PKEY_CTRL_MD:
146 if (ctx->pkey && !CMAC_CTX_copy(ctx->data,
147 (CMAC_CTX *)ctx->pkey->pkey.ptr))
149 if (!CMAC_Init(cmctx, NULL, 0, NULL, NULL))
160 static int pkey_cmac_ctrl_str(EVP_PKEY_CTX *ctx,
161 const char *type, const char *value)
167 if (!strcmp(type, "key"))
169 void *p = (void *)value;
170 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
173 if (!strcmp(type, "cipher"))
176 c = EVP_get_cipherbyname(value);
179 return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
181 if (!strcmp(type, "hexkey"))
186 key = string_to_hex(value, &keylen);
189 r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
196 const EVP_PKEY_METHOD cmac_pkey_meth =
199 EVP_PKEY_FLAG_SIGCTX_CUSTOM,