OLD | NEW |
(Empty) | |
| 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); |
| 103 HMAC_CTX_copy(&dctx->ctx, &sctx->ctx); |
| 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; |
| 144 HMAC_Update(&hctx->ctx, data, count); |
| 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 |
| 170 HMAC_Final(&hctx->ctx, sig, &hlen); |
| 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; |
| 195 HMAC_Init_ex(&hctx->ctx, key->data, key->length, hctx->md, |
| 196 ctx->engine); |
| 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 }; |
OLD | NEW |