Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* Written by Ben Laurie, 2001 */ |
| 2 | /* |
| 3 | * Copyright (c) 2001 The OpenSSL Project. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in |
| 14 | * the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * |
| 17 | * 3. All advertising materials mentioning features or use of this |
| 18 | * software must display the following acknowledgment: |
| 19 | * "This product includes software developed by the OpenSSL Project |
| 20 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
| 21 | * |
| 22 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 23 | * endorse or promote products derived from this software without |
| 24 | * prior written permission. For written permission, please contact |
| 25 | * openssl-core@openssl.org. |
| 26 | * |
| 27 | * 5. Products derived from this software may not be called "OpenSSL" |
| 28 | * nor may "OpenSSL" appear in their names without prior written |
| 29 | * permission of the OpenSSL Project. |
| 30 | * |
| 31 | * 6. Redistributions of any form whatsoever must retain the following |
| 32 | * acknowledgment: |
| 33 | * "This product includes software developed by the OpenSSL Project |
| 34 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
| 35 | * |
| 36 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 37 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 39 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 40 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 41 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 42 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 43 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 45 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 46 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 47 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 48 | */ |
| 49 | |
| 50 | #include <openssl/evp.h> |
| 51 | #include <openssl/objects.h> |
| 52 | #include <openssl/rsa.h> |
| 53 | #include "evp_locl.h" |
| 54 | |
| 55 | /* This stuff should now all be supported through |
| 56 | * crypto/engine/hw_openbsd_dev_crypto.c unless I botched it up */ |
| 57 | static void *dummy=&dummy; |
| 58 | |
| 59 | #if 0 |
| 60 | |
| 61 | /* check flag after OpenSSL headers to ensure make depend works */ |
| 62 | #ifdef OPENSSL_OPENBSD_DEV_CRYPTO |
| 63 | |
| 64 | #include <fcntl.h> |
| 65 | #include <stdio.h> |
| 66 | #include <errno.h> |
| 67 | #include <sys/ioctl.h> |
| 68 | #include <crypto/cryptodev.h> |
| 69 | #include <unistd.h> |
| 70 | #include <assert.h> |
| 71 | |
| 72 | /* longest key supported in hardware */ |
| 73 | #define MAX_HW_KEY 24 |
| 74 | #define MAX_HW_IV 8 |
| 75 | |
| 76 | #define MD5_DIGEST_LENGTH 16 |
| 77 | #define MD5_CBLOCK 64 |
| 78 | |
| 79 | static int fd; |
| 80 | static int dev_failed; |
| 81 | |
| 82 | typedef struct session_op session_op; |
| 83 | |
| 84 | #define CDATA(ctx) EVP_C_DATA(session_op,ctx) |
| 85 | |
| 86 | static void err(const char *str) |
| 87 | { |
| 88 | fprintf(stderr,"%s: errno %d\n",str,errno); |
| 89 | } |
| 90 | |
| 91 | static int dev_crypto_init(session_op *ses) |
| 92 | { |
| 93 | if(dev_failed) |
| 94 | return 0; |
| 95 | if(!fd) |
| 96 | { |
| 97 | int cryptodev_fd; |
| 98 | |
| 99 | if ((cryptodev_fd=open("/dev/crypto",O_RDWR,0)) < 0) |
| 100 | { |
| 101 | err("/dev/crypto"); |
| 102 | dev_failed=1; |
| 103 | return 0; |
| 104 | } |
| 105 | if (ioctl(cryptodev_fd,CRIOGET,&fd) == -1) |
| 106 | { |
| 107 | err("CRIOGET failed"); |
| 108 | close(cryptodev_fd); |
| 109 | dev_failed=1; |
| 110 | return 0; |
| 111 | } |
| 112 | close(cryptodev_fd); |
| 113 | } |
| 114 | assert(ses); |
| 115 | memset(ses,'\0',sizeof *ses); |
| 116 | |
| 117 | return 1; |
| 118 | } |
| 119 | |
| 120 | static int dev_crypto_cleanup(EVP_CIPHER_CTX *ctx) |
| 121 | { |
| 122 | if(ioctl(fd,CIOCFSESSION,&CDATA(ctx)->ses) == -1) |
| 123 | err("CIOCFSESSION failed"); |
| 124 | |
| 125 | OPENSSL_free(CDATA(ctx)->key); |
| 126 | |
| 127 | return 1; |
| 128 | } |
| 129 | |
| 130 | static int dev_crypto_init_key(EVP_CIPHER_CTX *ctx,int cipher, |
| 131 | const unsigned char *key,int klen) |
| 132 | { |
| 133 | if(!dev_crypto_init(CDATA(ctx))) |
| 134 | return 0; |
| 135 | |
| 136 | CDATA(ctx)->key=OPENSSL_malloc(MAX_HW_KEY); |
| 137 | |
| 138 | assert(ctx->cipher->iv_len <= MAX_HW_IV); |
| 139 | |
| 140 | memcpy(CDATA(ctx)->key,key,klen); |
| 141 | |
| 142 | CDATA(ctx)->cipher=cipher; |
| 143 | CDATA(ctx)->keylen=klen; |
| 144 | |
| 145 | if (ioctl(fd,CIOCGSESSION,CDATA(ctx)) == -1) |
| 146 | { |
| 147 | err("CIOCGSESSION failed"); |
| 148 | return 0; |
| 149 | } |
| 150 | return 1; |
| 151 | } |
| 152 | |
| 153 | static int dev_crypto_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, |
| 154 | const unsigned char *in,unsigned int inl) |
| 155 | { |
| 156 | struct crypt_op cryp; |
| 157 | unsigned char lb[MAX_HW_IV]; |
| 158 | |
| 159 | if(!inl) |
| 160 | return 1; |
| 161 | |
| 162 | assert(CDATA(ctx)); |
| 163 | assert(!dev_failed); |
| 164 | |
| 165 | memset(&cryp,'\0',sizeof cryp); |
| 166 | cryp.ses=CDATA(ctx)->ses; |
| 167 | cryp.op=ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT; |
| 168 | cryp.flags=0; |
| 169 | cryp.len=inl; |
| 170 | assert((inl&(ctx->cipher->block_size-1)) == 0); |
| 171 | cryp.src=(caddr_t)in; |
| 172 | cryp.dst=(caddr_t)out; |
| 173 | cryp.mac=0; |
| 174 | if(ctx->cipher->iv_len) |
| 175 | cryp.iv=(caddr_t)ctx->iv; |
| 176 | |
| 177 | if(!ctx->encrypt) |
| 178 | memcpy(lb,&in[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len); |
| 179 | |
| 180 | if(ioctl(fd, CIOCCRYPT, &cryp) == -1) |
| 181 | { |
| 182 | if(errno == EINVAL) /* buffers are misaligned */ |
| 183 | { |
| 184 | unsigned int cinl=0; |
| 185 | char *cin=NULL; |
| 186 | char *cout=NULL; |
| 187 | |
| 188 | /* NB: this can only make cinl != inl with stream ciphers */ |
| 189 | cinl=(inl+3)/4*4; |
| 190 | |
| 191 | if(((unsigned long)in&3) || cinl != inl) |
| 192 | { |
| 193 | cin=OPENSSL_malloc(cinl); |
| 194 | memcpy(cin,in,inl); |
| 195 | cryp.src=cin; |
| 196 | } |
| 197 | |
| 198 | if(((unsigned long)out&3) || cinl != inl) |
| 199 | { |
| 200 | cout=OPENSSL_malloc(cinl); |
| 201 | cryp.dst=cout; |
| 202 | } |
| 203 | |
| 204 | cryp.len=cinl; |
| 205 | |
| 206 | if(ioctl(fd, CIOCCRYPT, &cryp) == -1) |
| 207 | { |
| 208 | err("CIOCCRYPT(2) failed"); |
| 209 | printf("src=%p dst=%p\n",cryp.src,cryp.dst); |
| 210 | abort(); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | if(cout) |
| 215 | { |
| 216 | memcpy(out,cout,inl); |
| 217 | OPENSSL_free(cout); |
| 218 | } |
| 219 | if(cin) |
| 220 | OPENSSL_free(cin); |
| 221 | } |
| 222 | else |
| 223 | { |
| 224 | err("CIOCCRYPT failed"); |
| 225 | abort(); |
| 226 | return 0; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | if(ctx->encrypt) |
| 231 | memcpy(ctx->iv,&out[cryp.len-ctx->cipher->iv_len],ctx->cipher->iv_len); |
| 232 | else |
| 233 | memcpy(ctx->iv,lb,ctx->cipher->iv_len); |
| 234 | |
| 235 | return 1; |
| 236 | } |
| 237 | |
| 238 | static int dev_crypto_des_ede3_init_key(EVP_CIPHER_CTX *ctx, |
| 239 | const unsigned char *key, |
| 240 | const unsigned char *iv, int enc) |
| 241 | { return dev_crypto_init_key(ctx,CRYPTO_3DES_CBC,key,24); } |
| 242 | |
| 243 | #define dev_crypto_des_ede3_cbc_cipher dev_crypto_cipher |
| 244 | |
| 245 | BLOCK_CIPHER_def_cbc(dev_crypto_des_ede3, session_op, NID_des_ede3, 8, 24, 8, |
| 246 | 0, dev_crypto_des_ede3_init_key, |
| 247 | dev_crypto_cleanup, |
| 248 | EVP_CIPHER_set_asn1_iv, |
| 249 | EVP_CIPHER_get_asn1_iv, |
| 250 | NULL) |
| 251 | |
| 252 | static int dev_crypto_rc4_init_key(EVP_CIPHER_CTX *ctx, |
| 253 | const unsigned char *key, |
| 254 | const unsigned char *iv, int enc) |
| 255 | { return dev_crypto_init_key(ctx,CRYPTO_ARC4,key,16); } |
| 256 | |
| 257 | static const EVP_CIPHER r4_cipher= |
| 258 | { |
| 259 | NID_rc4, |
| 260 | 1,16,0, /* FIXME: key should be up to 256 bytes */ |
| 261 | EVP_CIPH_VARIABLE_LENGTH, |
| 262 | dev_crypto_rc4_init_key, |
| 263 | dev_crypto_cipher, |
| 264 | dev_crypto_cleanup, |
| 265 | sizeof(session_op), |
| 266 | NULL, |
| 267 | NULL, |
| 268 | NULL |
| 269 | }; |
| 270 | |
| 271 | const EVP_CIPHER *EVP_dev_crypto_rc4(void) |
| 272 | { return &r4_cipher; } |
| 273 | |
| 274 | typedef struct |
| 275 | { |
| 276 | session_op sess; |
| 277 | char *data; |
| 278 | int len; |
| 279 | unsigned char md[EVP_MAX_MD_SIZE]; |
| 280 | } MD_DATA; |
| 281 | |
| 282 | static int dev_crypto_init_digest(MD_DATA *md_data,int mac) |
| 283 | { |
| 284 | if(!dev_crypto_init(&md_data->sess)) |
| 285 | return 0; |
| 286 | |
| 287 | md_data->len=0; |
| 288 | md_data->data=NULL; |
| 289 | |
| 290 | md_data->sess.mac=mac; |
| 291 | |
| 292 | if (ioctl(fd,CIOCGSESSION,&md_data->sess) == -1) |
| 293 | { |
| 294 | err("CIOCGSESSION failed"); |
| 295 | return 0; |
| 296 | } |
| 297 | return 1; |
| 298 | } |
| 299 | |
| 300 | static int dev_crypto_cleanup_digest(MD_DATA *md_data) |
| 301 | { |
| 302 | if (ioctl(fd,CIOCFSESSION,&md_data->sess.ses) == -1) |
| 303 | { |
| 304 | err("CIOCFSESSION failed"); |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | return 1; |
| 309 | } |
| 310 | |
| 311 | /* FIXME: if device can do chained MACs, then don't accumulate */ |
| 312 | /* FIXME: move accumulation to the framework */ |
| 313 | static int dev_crypto_md5_init(EVP_MD_CTX *ctx) |
| 314 | { return dev_crypto_init_digest(ctx->md_data,CRYPTO_MD5); } |
| 315 | |
| 316 | static int do_digest(int ses,unsigned char *md,const void *data,int len) |
| 317 | { |
| 318 | struct crypt_op cryp; |
| 319 | static unsigned char md5zero[16]= |
| 320 | { |
| 321 | 0xd4,0x1d,0x8c,0xd9,0x8f,0x00,0xb2,0x04, |
| 322 | 0xe9,0x80,0x09,0x98,0xec,0xf8,0x42,0x7e |
| 323 | }; |
| 324 | |
| 325 | /* some cards can't do zero length */ |
| 326 | if(!len) |
| 327 | { |
| 328 | memcpy(md,md5zero,16); |
| 329 | return 1; |
| 330 | } |
| 331 | |
| 332 | memset(&cryp,'\0',sizeof cryp); |
| 333 | cryp.ses=ses; |
| 334 | cryp.op=COP_ENCRYPT;/* required to do the MAC rather than check it */ |
| 335 | cryp.len=len; |
| 336 | cryp.src=(caddr_t)data; |
| 337 | cryp.dst=(caddr_t)data; // FIXME!!! |
| 338 | cryp.mac=(caddr_t)md; |
| 339 | |
| 340 | if(ioctl(fd, CIOCCRYPT, &cryp) == -1) |
| 341 | { |
| 342 | if(errno == EINVAL) /* buffer is misaligned */ |
| 343 | { |
| 344 | char *dcopy; |
| 345 | |
| 346 | dcopy=OPENSSL_malloc(len); |
| 347 | memcpy(dcopy,data,len); |
| 348 | cryp.src=dcopy; |
| 349 | cryp.dst=cryp.src; // FIXME!!! |
| 350 | |
| 351 | if(ioctl(fd, CIOCCRYPT, &cryp) == -1) |
| 352 | { |
| 353 | err("CIOCCRYPT(MAC2) failed"); |
| 354 | abort(); |
| 355 | return 0; |
| 356 | } |
| 357 | OPENSSL_free(dcopy); |
| 358 | } |
| 359 | else |
| 360 | { |
| 361 | err("CIOCCRYPT(MAC) failed"); |
| 362 | abort(); |
| 363 | return 0; |
| 364 | } |
| 365 | } |
| 366 | // printf("done\n"); |
| 367 | |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data, |
| 372 | unsigned long len) |
| 373 | { |
| 374 | MD_DATA *md_data=ctx->md_data; |
| 375 | |
| 376 | if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT) |
| 377 | return do_digest(md_data->sess.ses,md_data->md,data,len); |
| 378 | |
| 379 | md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len); |
| 380 | memcpy(md_data->data+md_data->len,data,len); |
| 381 | md_data->len+=len; |
| 382 | |
| 383 | return 1; |
| 384 | } |
| 385 | |
| 386 | static int dev_crypto_md5_final(EVP_MD_CTX *ctx,unsigned char *md) |
| 387 | { |
| 388 | int ret; |
| 389 | MD_DATA *md_data=ctx->md_data; |
| 390 | |
| 391 | if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT) |
| 392 | { |
| 393 | memcpy(md,md_data->md,MD5_DIGEST_LENGTH); |
| 394 | ret=1; |
| 395 | } |
| 396 | else |
| 397 | { |
| 398 | ret=do_digest(md_data->sess.ses,md,md_data->data,md_data->len); |
| 399 | OPENSSL_free(md_data->data); |
| 400 | md_data->data=NULL; |
| 401 | md_data->len=0; |
| 402 | } |
| 403 | |
| 404 | return ret; |
| 405 | } |
| 406 | |
| 407 | static int dev_crypto_md5_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from) |
| 408 | { |
| 409 | const MD_DATA *from_md=from->md_data; |
| 410 | MD_DATA *to_md=to->md_data; |
| 411 | |
| 412 | // How do we copy sessions? |
| 413 | assert(from->digest->flags&EVP_MD_FLAG_ONESHOT); |
| 414 | |
| 415 | to_md->data=OPENSSL_malloc(from_md->len); |
| 416 | memcpy(to_md->data,from_md->data,from_md->len); |
| 417 | |
| 418 | return 1; |
| 419 | } |
| 420 | |
| 421 | static int dev_crypto_md5_cleanup(EVP_MD_CTX *ctx) |
| 422 | { |
| 423 | return dev_crypto_cleanup_digest(ctx->md_data); |
| 424 | } |
| 425 | |
| 426 | static const EVP_MD md5_md= |
| 427 | { |
| 428 | NID_md5, |
| 429 | NID_md5WithRSAEncryption, |
| 430 | MD5_DIGEST_LENGTH, |
| 431 | EVP_MD_FLAG_ONESHOT, // XXX: set according to device info... |
| 432 | dev_crypto_md5_init, |
| 433 | dev_crypto_md5_update, |
| 434 | dev_crypto_md5_final, |
| 435 | dev_crypto_md5_copy, |
| 436 | dev_crypto_md5_cleanup, |
| 437 | EVP_PKEY_RSA_method, |
| 438 | MD5_CBLOCK, |
| 439 | sizeof(MD_DATA), |
| 440 | }; |
| 441 | |
| 442 | const EVP_MD *EVP_dev_crypto_md5(void) |
| 443 | { return &md5_md; } |
| 444 | |
| 445 | #endif |
| 446 | #endif |