Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 2 | * project 2007. |
| 3 | */ |
| 4 | /* ==================================================================== |
| 5 | * Copyright (c) 2007 The OpenSSL Project. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * |
| 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 |
| 17 | * distribution. |
| 18 | * |
| 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/)" |
| 23 | * |
| 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. |
| 28 | * |
| 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. |
| 32 | * |
| 33 | * 6. Redistributions of any form whatsoever must retain the following |
| 34 | * acknowledgment: |
| 35 | * "This product includes software developed by the OpenSSL Project |
| 36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 37 | * |
| 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 | * ==================================================================== |
| 51 | * |
| 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). |
| 55 | * |
| 56 | */ |
| 57 | |
| 58 | #include <stdio.h> |
| 59 | #include "cryptlib.h" |
| 60 | #include <openssl/x509.h> |
| 61 | #include <openssl/x509v3.h> |
| 62 | #include <openssl/evp.h> |
| 63 | #include <openssl/hmac.h> |
| 64 | #include "evp_locl.h" |
| 65 | |
| 66 | /* HMAC pkey context structure */ |
| 67 | |
| 68 | typedef struct |
| 69 | { |
| 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 | static int pkey_hmac_init(EVP_PKEY_CTX *ctx) |
| 76 | { |
| 77 | HMAC_PKEY_CTX *hctx; |
| 78 | hctx = OPENSSL_malloc(sizeof(HMAC_PKEY_CTX)); |
| 79 | if (!hctx) |
| 80 | return 0; |
| 81 | hctx->md = NULL; |
| 82 | hctx->ktmp.data = NULL; |
| 83 | hctx->ktmp.length = 0; |
| 84 | hctx->ktmp.flags = 0; |
| 85 | hctx->ktmp.type = V_ASN1_OCTET_STRING; |
| 86 | HMAC_CTX_init(&hctx->ctx); |
| 87 | |
| 88 | ctx->data = hctx; |
| 89 | ctx->keygen_info_count = 0; |
| 90 | |
| 91 | return 1; |
| 92 | } |
| 93 | |
| 94 | static int pkey_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) |
| 95 | { |
| 96 | HMAC_PKEY_CTX *sctx, *dctx; |
| 97 | if (!pkey_hmac_init(dst)) |
| 98 | return 0; |
| 99 | sctx = src->data; |
| 100 | dctx = dst->data; |
| 101 | dctx->md = sctx->md; |
| 102 | HMAC_CTX_init(&dctx->ctx); |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 103 | HMAC_CTX_copy(&dctx->ctx, &sctx->ctx); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 104 | if (sctx->ktmp.data) |
| 105 | { |
| 106 | if (!ASN1_OCTET_STRING_set(&dctx->ktmp, |
| 107 | sctx->ktmp.data, sctx->ktmp.length)) |
| 108 | return 0; |
| 109 | } |
| 110 | return 1; |
| 111 | } |
| 112 | |
| 113 | static void pkey_hmac_cleanup(EVP_PKEY_CTX *ctx) |
| 114 | { |
| 115 | HMAC_PKEY_CTX *hctx = ctx->data; |
| 116 | HMAC_CTX_cleanup(&hctx->ctx); |
| 117 | if (hctx->ktmp.data) |
| 118 | { |
| 119 | if (hctx->ktmp.length) |
| 120 | OPENSSL_cleanse(hctx->ktmp.data, hctx->ktmp.length); |
| 121 | OPENSSL_free(hctx->ktmp.data); |
| 122 | hctx->ktmp.data = NULL; |
| 123 | } |
| 124 | OPENSSL_free(hctx); |
| 125 | } |
| 126 | |
| 127 | static int pkey_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) |
| 128 | { |
| 129 | ASN1_OCTET_STRING *hkey = NULL; |
| 130 | HMAC_PKEY_CTX *hctx = ctx->data; |
| 131 | if (!hctx->ktmp.data) |
| 132 | return 0; |
| 133 | hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp); |
| 134 | if (!hkey) |
| 135 | return 0; |
| 136 | EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey); |
| 137 | |
| 138 | return 1; |
| 139 | } |
| 140 | |
| 141 | static int int_update(EVP_MD_CTX *ctx,const void *data,size_t count) |
| 142 | { |
| 143 | HMAC_PKEY_CTX *hctx = ctx->pctx->data; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 144 | HMAC_Update(&hctx->ctx, data, count); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 145 | return 1; |
| 146 | } |
| 147 | |
| 148 | static int hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx) |
| 149 | { |
| 150 | HMAC_PKEY_CTX *hctx = ctx->data; |
| 151 | HMAC_CTX_set_flags(&hctx->ctx, mctx->flags & ~EVP_MD_CTX_FLAG_NO_INIT); |
| 152 | EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT); |
| 153 | mctx->update = int_update; |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | 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 | HMAC_PKEY_CTX *hctx = ctx->data; |
| 162 | int l = EVP_MD_CTX_size(mctx); |
| 163 | |
| 164 | if (l < 0) |
| 165 | return 0; |
| 166 | *siglen = l; |
| 167 | if (!sig) |
| 168 | return 1; |
| 169 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 170 | HMAC_Final(&hctx->ctx, sig, &hlen); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 171 | *siglen = (size_t)hlen; |
| 172 | return 1; |
| 173 | } |
| 174 | |
| 175 | static int pkey_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) |
| 176 | { |
| 177 | HMAC_PKEY_CTX *hctx = ctx->data; |
| 178 | ASN1_OCTET_STRING *key; |
| 179 | switch (type) |
| 180 | { |
| 181 | |
| 182 | case EVP_PKEY_CTRL_SET_MAC_KEY: |
| 183 | if ((!p2 && p1 > 0) || (p1 < -1)) |
| 184 | return 0; |
| 185 | if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1)) |
| 186 | return 0; |
| 187 | break; |
| 188 | |
| 189 | case EVP_PKEY_CTRL_MD: |
| 190 | hctx->md = p2; |
| 191 | break; |
| 192 | |
| 193 | case EVP_PKEY_CTRL_DIGESTINIT: |
| 194 | key = (ASN1_OCTET_STRING *)ctx->pkey->pkey.ptr; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 195 | HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md, |
| 196 | ctx->engine); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 197 | break; |
| 198 | |
| 199 | default: |
| 200 | return -2; |
| 201 | |
| 202 | } |
| 203 | return 1; |
| 204 | } |
| 205 | |
| 206 | static int pkey_hmac_ctrl_str(EVP_PKEY_CTX *ctx, |
| 207 | const char *type, const char *value) |
| 208 | { |
| 209 | if (!value) |
| 210 | { |
| 211 | return 0; |
| 212 | } |
| 213 | if (!strcmp(type, "key")) |
| 214 | { |
| 215 | void *p = (void *)value; |
| 216 | return pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, |
| 217 | -1, p); |
| 218 | } |
| 219 | if (!strcmp(type, "hexkey")) |
| 220 | { |
| 221 | unsigned char *key; |
| 222 | int r; |
| 223 | long keylen; |
| 224 | key = string_to_hex(value, &keylen); |
| 225 | if (!key) |
| 226 | return 0; |
| 227 | r = pkey_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key); |
| 228 | OPENSSL_free(key); |
| 229 | return r; |
| 230 | } |
| 231 | return -2; |
| 232 | } |
| 233 | |
| 234 | const EVP_PKEY_METHOD hmac_pkey_meth = |
| 235 | { |
| 236 | EVP_PKEY_HMAC, |
| 237 | 0, |
| 238 | pkey_hmac_init, |
| 239 | pkey_hmac_copy, |
| 240 | pkey_hmac_cleanup, |
| 241 | |
| 242 | 0, 0, |
| 243 | |
| 244 | 0, |
| 245 | pkey_hmac_keygen, |
| 246 | |
| 247 | 0, 0, |
| 248 | |
| 249 | 0, 0, |
| 250 | |
| 251 | 0,0, |
| 252 | |
| 253 | hmac_signctx_init, |
| 254 | hmac_signctx, |
| 255 | |
| 256 | 0,0, |
| 257 | |
| 258 | 0,0, |
| 259 | |
| 260 | 0,0, |
| 261 | |
| 262 | 0,0, |
| 263 | |
| 264 | pkey_hmac_ctrl, |
| 265 | pkey_hmac_ctrl_str |
| 266 | |
| 267 | }; |