Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2002 Bob Beck <beck@openbsd.org> |
| 3 | * Copyright (c) 2002 Theo de Raadt |
| 4 | * Copyright (c) 2002 Markus Friedl |
| 5 | * 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 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY |
| 17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY |
| 20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include <openssl/objects.h> |
| 30 | #include <openssl/engine.h> |
| 31 | #include <openssl/evp.h> |
| 32 | #include <openssl/bn.h> |
| 33 | |
| 34 | #if (defined(__unix__) || defined(unix)) && !defined(USG) && \ |
| 35 | (defined(OpenBSD) || defined(__FreeBSD__)) |
| 36 | #include <sys/param.h> |
| 37 | # if (OpenBSD >= 200112) || ((__FreeBSD_version >= 470101 && __FreeBSD_version < 500000) || __FreeBSD_version >= 500041) |
| 38 | # define HAVE_CRYPTODEV |
| 39 | # endif |
| 40 | # if (OpenBSD >= 200110) |
| 41 | # define HAVE_SYSLOG_R |
| 42 | # endif |
| 43 | #endif |
| 44 | |
| 45 | #ifndef HAVE_CRYPTODEV |
| 46 | |
| 47 | void |
| 48 | ENGINE_load_cryptodev(void) |
| 49 | { |
| 50 | /* This is a NOP on platforms without /dev/crypto */ |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | #else |
| 55 | |
| 56 | #include <sys/types.h> |
| 57 | #include <crypto/cryptodev.h> |
| 58 | #include <crypto/dh/dh.h> |
| 59 | #include <crypto/dsa/dsa.h> |
| 60 | #include <crypto/err/err.h> |
| 61 | #include <crypto/rsa/rsa.h> |
| 62 | #include <sys/ioctl.h> |
| 63 | #include <errno.h> |
| 64 | #include <stdio.h> |
| 65 | #include <unistd.h> |
| 66 | #include <fcntl.h> |
| 67 | #include <stdarg.h> |
| 68 | #include <syslog.h> |
| 69 | #include <errno.h> |
| 70 | #include <string.h> |
| 71 | |
| 72 | struct dev_crypto_state { |
| 73 | struct session_op d_sess; |
| 74 | int d_fd; |
| 75 | |
| 76 | #ifdef USE_CRYPTODEV_DIGESTS |
| 77 | char dummy_mac_key[HASH_MAX_LEN]; |
| 78 | |
| 79 | unsigned char digest_res[HASH_MAX_LEN]; |
| 80 | char *mac_data; |
| 81 | int mac_len; |
| 82 | #endif |
| 83 | }; |
| 84 | |
| 85 | static u_int32_t cryptodev_asymfeat = 0; |
| 86 | |
| 87 | static int get_asym_dev_crypto(void); |
| 88 | static int open_dev_crypto(void); |
| 89 | static int get_dev_crypto(void); |
| 90 | static int get_cryptodev_ciphers(const int **cnids); |
| 91 | #ifdef USE_CRYPTODEV_DIGESTS |
| 92 | static int get_cryptodev_digests(const int **cnids); |
| 93 | #endif |
| 94 | static int cryptodev_usable_ciphers(const int **nids); |
| 95 | static int cryptodev_usable_digests(const int **nids); |
| 96 | static int cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 97 | const unsigned char *in, size_t inl); |
| 98 | static int cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 99 | const unsigned char *iv, int enc); |
| 100 | static int cryptodev_cleanup(EVP_CIPHER_CTX *ctx); |
| 101 | static int cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher, |
| 102 | const int **nids, int nid); |
| 103 | static int cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest, |
| 104 | const int **nids, int nid); |
| 105 | static int bn2crparam(const BIGNUM *a, struct crparam *crp); |
| 106 | static int crparam2bn(struct crparam *crp, BIGNUM *a); |
| 107 | static void zapparams(struct crypt_kop *kop); |
| 108 | static int cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, |
| 109 | int slen, BIGNUM *s); |
| 110 | |
| 111 | static int cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, |
| 112 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); |
| 113 | static int cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, |
| 114 | RSA *rsa, BN_CTX *ctx); |
| 115 | static int cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); |
| 116 | static int cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, |
| 117 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); |
| 118 | static int cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g, |
| 119 | BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p, |
| 120 | BN_CTX *ctx, BN_MONT_CTX *mont); |
| 121 | static DSA_SIG *cryptodev_dsa_do_sign(const unsigned char *dgst, |
| 122 | int dlen, DSA *dsa); |
| 123 | static int cryptodev_dsa_verify(const unsigned char *dgst, int dgst_len, |
| 124 | DSA_SIG *sig, DSA *dsa); |
| 125 | static int cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a, |
| 126 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, |
| 127 | BN_MONT_CTX *m_ctx); |
| 128 | static int cryptodev_dh_compute_key(unsigned char *key, |
| 129 | const BIGNUM *pub_key, DH *dh); |
| 130 | static int cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, |
| 131 | void (*f)(void)); |
| 132 | void ENGINE_load_cryptodev(void); |
| 133 | |
| 134 | static const ENGINE_CMD_DEFN cryptodev_defns[] = { |
| 135 | { 0, NULL, NULL, 0 } |
| 136 | }; |
| 137 | |
| 138 | static struct { |
| 139 | int id; |
| 140 | int nid; |
| 141 | int ivmax; |
| 142 | int keylen; |
| 143 | } ciphers[] = { |
| 144 | { CRYPTO_ARC4, NID_rc4, 0, 16, }, |
| 145 | { CRYPTO_DES_CBC, NID_des_cbc, 8, 8, }, |
| 146 | { CRYPTO_3DES_CBC, NID_des_ede3_cbc, 8, 24, }, |
| 147 | { CRYPTO_AES_CBC, NID_aes_128_cbc, 16, 16, }, |
| 148 | { CRYPTO_AES_CBC, NID_aes_192_cbc, 16, 24, }, |
| 149 | { CRYPTO_AES_CBC, NID_aes_256_cbc, 16, 32, }, |
| 150 | { CRYPTO_BLF_CBC, NID_bf_cbc, 8, 16, }, |
| 151 | { CRYPTO_CAST_CBC, NID_cast5_cbc, 8, 16, }, |
| 152 | { CRYPTO_SKIPJACK_CBC, NID_undef, 0, 0, }, |
| 153 | { 0, NID_undef, 0, 0, }, |
| 154 | }; |
| 155 | |
| 156 | #ifdef USE_CRYPTODEV_DIGESTS |
| 157 | static struct { |
| 158 | int id; |
| 159 | int nid; |
| 160 | int keylen; |
| 161 | } digests[] = { |
| 162 | { CRYPTO_MD5_HMAC, NID_hmacWithMD5, 16}, |
| 163 | { CRYPTO_SHA1_HMAC, NID_hmacWithSHA1, 20}, |
| 164 | { CRYPTO_RIPEMD160_HMAC, NID_ripemd160, 16/*?*/}, |
| 165 | { CRYPTO_MD5_KPDK, NID_undef, 0}, |
| 166 | { CRYPTO_SHA1_KPDK, NID_undef, 0}, |
| 167 | { CRYPTO_MD5, NID_md5, 16}, |
| 168 | { CRYPTO_SHA1, NID_sha1, 20}, |
| 169 | { 0, NID_undef, 0}, |
| 170 | }; |
| 171 | #endif |
| 172 | |
| 173 | /* |
| 174 | * Return a fd if /dev/crypto seems usable, 0 otherwise. |
| 175 | */ |
| 176 | static int |
| 177 | open_dev_crypto(void) |
| 178 | { |
| 179 | static int fd = -1; |
| 180 | |
| 181 | if (fd == -1) { |
| 182 | if ((fd = open("/dev/crypto", O_RDWR, 0)) == -1) |
| 183 | return (-1); |
| 184 | /* close on exec */ |
| 185 | if (fcntl(fd, F_SETFD, 1) == -1) { |
| 186 | close(fd); |
| 187 | fd = -1; |
| 188 | return (-1); |
| 189 | } |
| 190 | } |
| 191 | return (fd); |
| 192 | } |
| 193 | |
| 194 | static int |
| 195 | get_dev_crypto(void) |
| 196 | { |
| 197 | int fd, retfd; |
| 198 | |
| 199 | if ((fd = open_dev_crypto()) == -1) |
| 200 | return (-1); |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 201 | #ifndef CRIOGET_NOT_NEEDED |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 202 | if (ioctl(fd, CRIOGET, &retfd) == -1) |
| 203 | return (-1); |
| 204 | |
| 205 | /* close on exec */ |
| 206 | if (fcntl(retfd, F_SETFD, 1) == -1) { |
| 207 | close(retfd); |
| 208 | return (-1); |
| 209 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 210 | #else |
| 211 | retfd = fd; |
| 212 | #endif |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 213 | return (retfd); |
| 214 | } |
| 215 | |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 216 | static void put_dev_crypto(int fd) |
| 217 | { |
| 218 | #ifndef CRIOGET_NOT_NEEDED |
| 219 | close(fd); |
| 220 | #endif |
| 221 | } |
| 222 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 223 | /* Caching version for asym operations */ |
| 224 | static int |
| 225 | get_asym_dev_crypto(void) |
| 226 | { |
| 227 | static int fd = -1; |
| 228 | |
| 229 | if (fd == -1) |
| 230 | fd = get_dev_crypto(); |
| 231 | return fd; |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Find out what ciphers /dev/crypto will let us have a session for. |
| 236 | * XXX note, that some of these openssl doesn't deal with yet! |
| 237 | * returning them here is harmless, as long as we return NULL |
| 238 | * when asked for a handler in the cryptodev_engine_ciphers routine |
| 239 | */ |
| 240 | static int |
| 241 | get_cryptodev_ciphers(const int **cnids) |
| 242 | { |
| 243 | static int nids[CRYPTO_ALGORITHM_MAX]; |
| 244 | struct session_op sess; |
| 245 | int fd, i, count = 0; |
| 246 | |
| 247 | if ((fd = get_dev_crypto()) < 0) { |
| 248 | *cnids = NULL; |
| 249 | return (0); |
| 250 | } |
| 251 | memset(&sess, 0, sizeof(sess)); |
| 252 | sess.key = (caddr_t)"123456789abcdefghijklmno"; |
| 253 | |
| 254 | for (i = 0; ciphers[i].id && count < CRYPTO_ALGORITHM_MAX; i++) { |
| 255 | if (ciphers[i].nid == NID_undef) |
| 256 | continue; |
| 257 | sess.cipher = ciphers[i].id; |
| 258 | sess.keylen = ciphers[i].keylen; |
| 259 | sess.mac = 0; |
| 260 | if (ioctl(fd, CIOCGSESSION, &sess) != -1 && |
| 261 | ioctl(fd, CIOCFSESSION, &sess.ses) != -1) |
| 262 | nids[count++] = ciphers[i].nid; |
| 263 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 264 | put_dev_crypto(fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 265 | |
| 266 | if (count > 0) |
| 267 | *cnids = nids; |
| 268 | else |
| 269 | *cnids = NULL; |
| 270 | return (count); |
| 271 | } |
| 272 | |
| 273 | #ifdef USE_CRYPTODEV_DIGESTS |
| 274 | /* |
| 275 | * Find out what digests /dev/crypto will let us have a session for. |
| 276 | * XXX note, that some of these openssl doesn't deal with yet! |
| 277 | * returning them here is harmless, as long as we return NULL |
| 278 | * when asked for a handler in the cryptodev_engine_digests routine |
| 279 | */ |
| 280 | static int |
| 281 | get_cryptodev_digests(const int **cnids) |
| 282 | { |
| 283 | static int nids[CRYPTO_ALGORITHM_MAX]; |
| 284 | struct session_op sess; |
| 285 | int fd, i, count = 0; |
| 286 | |
| 287 | if ((fd = get_dev_crypto()) < 0) { |
| 288 | *cnids = NULL; |
| 289 | return (0); |
| 290 | } |
| 291 | memset(&sess, 0, sizeof(sess)); |
| 292 | sess.mackey = (caddr_t)"123456789abcdefghijklmno"; |
| 293 | for (i = 0; digests[i].id && count < CRYPTO_ALGORITHM_MAX; i++) { |
| 294 | if (digests[i].nid == NID_undef) |
| 295 | continue; |
| 296 | sess.mac = digests[i].id; |
| 297 | sess.mackeylen = digests[i].keylen; |
| 298 | sess.cipher = 0; |
| 299 | if (ioctl(fd, CIOCGSESSION, &sess) != -1 && |
| 300 | ioctl(fd, CIOCFSESSION, &sess.ses) != -1) |
| 301 | nids[count++] = digests[i].nid; |
| 302 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 303 | put_dev_crypto(fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 304 | |
| 305 | if (count > 0) |
| 306 | *cnids = nids; |
| 307 | else |
| 308 | *cnids = NULL; |
| 309 | return (count); |
| 310 | } |
| 311 | #endif /* 0 */ |
| 312 | |
| 313 | /* |
| 314 | * Find the useable ciphers|digests from dev/crypto - this is the first |
| 315 | * thing called by the engine init crud which determines what it |
| 316 | * can use for ciphers from this engine. We want to return |
| 317 | * only what we can do, anythine else is handled by software. |
| 318 | * |
| 319 | * If we can't initialize the device to do anything useful for |
| 320 | * any reason, we want to return a NULL array, and 0 length, |
| 321 | * which forces everything to be done is software. By putting |
| 322 | * the initalization of the device in here, we ensure we can |
| 323 | * use this engine as the default, and if for whatever reason |
| 324 | * /dev/crypto won't do what we want it will just be done in |
| 325 | * software |
| 326 | * |
| 327 | * This can (should) be greatly expanded to perhaps take into |
| 328 | * account speed of the device, and what we want to do. |
| 329 | * (although the disabling of particular alg's could be controlled |
| 330 | * by the device driver with sysctl's.) - this is where we |
| 331 | * want most of the decisions made about what we actually want |
| 332 | * to use from /dev/crypto. |
| 333 | */ |
| 334 | static int |
| 335 | cryptodev_usable_ciphers(const int **nids) |
| 336 | { |
| 337 | return (get_cryptodev_ciphers(nids)); |
| 338 | } |
| 339 | |
| 340 | static int |
| 341 | cryptodev_usable_digests(const int **nids) |
| 342 | { |
| 343 | #ifdef USE_CRYPTODEV_DIGESTS |
| 344 | return (get_cryptodev_digests(nids)); |
| 345 | #else |
| 346 | /* |
| 347 | * XXXX just disable all digests for now, because it sucks. |
| 348 | * we need a better way to decide this - i.e. I may not |
| 349 | * want digests on slow cards like hifn on fast machines, |
| 350 | * but might want them on slow or loaded machines, etc. |
| 351 | * will also want them when using crypto cards that don't |
| 352 | * suck moose gonads - would be nice to be able to decide something |
| 353 | * as reasonable default without having hackery that's card dependent. |
| 354 | * of course, the default should probably be just do everything, |
| 355 | * with perhaps a sysctl to turn algoritms off (or have them off |
| 356 | * by default) on cards that generally suck like the hifn. |
| 357 | */ |
| 358 | *nids = NULL; |
| 359 | return (0); |
| 360 | #endif |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | cryptodev_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| 365 | const unsigned char *in, size_t inl) |
| 366 | { |
| 367 | struct crypt_op cryp; |
| 368 | struct dev_crypto_state *state = ctx->cipher_data; |
| 369 | struct session_op *sess = &state->d_sess; |
| 370 | const void *iiv; |
| 371 | unsigned char save_iv[EVP_MAX_IV_LENGTH]; |
| 372 | |
| 373 | if (state->d_fd < 0) |
| 374 | return (0); |
| 375 | if (!inl) |
| 376 | return (1); |
| 377 | if ((inl % ctx->cipher->block_size) != 0) |
| 378 | return (0); |
| 379 | |
| 380 | memset(&cryp, 0, sizeof(cryp)); |
| 381 | |
| 382 | cryp.ses = sess->ses; |
| 383 | cryp.flags = 0; |
| 384 | cryp.len = inl; |
| 385 | cryp.src = (caddr_t) in; |
| 386 | cryp.dst = (caddr_t) out; |
| 387 | cryp.mac = 0; |
| 388 | |
| 389 | cryp.op = ctx->encrypt ? COP_ENCRYPT : COP_DECRYPT; |
| 390 | |
| 391 | if (ctx->cipher->iv_len) { |
| 392 | cryp.iv = (caddr_t) ctx->iv; |
| 393 | if (!ctx->encrypt) { |
| 394 | iiv = in + inl - ctx->cipher->iv_len; |
| 395 | memcpy(save_iv, iiv, ctx->cipher->iv_len); |
| 396 | } |
| 397 | } else |
| 398 | cryp.iv = NULL; |
| 399 | |
| 400 | if (ioctl(state->d_fd, CIOCCRYPT, &cryp) == -1) { |
| 401 | /* XXX need better errror handling |
| 402 | * this can fail for a number of different reasons. |
| 403 | */ |
| 404 | return (0); |
| 405 | } |
| 406 | |
| 407 | if (ctx->cipher->iv_len) { |
| 408 | if (ctx->encrypt) |
| 409 | iiv = out + inl - ctx->cipher->iv_len; |
| 410 | else |
| 411 | iiv = save_iv; |
| 412 | memcpy(ctx->iv, iiv, ctx->cipher->iv_len); |
| 413 | } |
| 414 | return (1); |
| 415 | } |
| 416 | |
| 417 | static int |
| 418 | cryptodev_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
| 419 | const unsigned char *iv, int enc) |
| 420 | { |
| 421 | struct dev_crypto_state *state = ctx->cipher_data; |
| 422 | struct session_op *sess = &state->d_sess; |
| 423 | int cipher = -1, i; |
| 424 | |
| 425 | for (i = 0; ciphers[i].id; i++) |
| 426 | if (ctx->cipher->nid == ciphers[i].nid && |
| 427 | ctx->cipher->iv_len <= ciphers[i].ivmax && |
| 428 | ctx->key_len == ciphers[i].keylen) { |
| 429 | cipher = ciphers[i].id; |
| 430 | break; |
| 431 | } |
| 432 | |
| 433 | if (!ciphers[i].id) { |
| 434 | state->d_fd = -1; |
| 435 | return (0); |
| 436 | } |
| 437 | |
| 438 | memset(sess, 0, sizeof(struct session_op)); |
| 439 | |
| 440 | if ((state->d_fd = get_dev_crypto()) < 0) |
| 441 | return (0); |
| 442 | |
| 443 | sess->key = (caddr_t)key; |
| 444 | sess->keylen = ctx->key_len; |
| 445 | sess->cipher = cipher; |
| 446 | |
| 447 | if (ioctl(state->d_fd, CIOCGSESSION, sess) == -1) { |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 448 | put_dev_crypto(state->d_fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 449 | state->d_fd = -1; |
| 450 | return (0); |
| 451 | } |
| 452 | return (1); |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * free anything we allocated earlier when initting a |
| 457 | * session, and close the session. |
| 458 | */ |
| 459 | static int |
| 460 | cryptodev_cleanup(EVP_CIPHER_CTX *ctx) |
| 461 | { |
| 462 | int ret = 0; |
| 463 | struct dev_crypto_state *state = ctx->cipher_data; |
| 464 | struct session_op *sess = &state->d_sess; |
| 465 | |
| 466 | if (state->d_fd < 0) |
| 467 | return (0); |
| 468 | |
| 469 | /* XXX if this ioctl fails, someting's wrong. the invoker |
| 470 | * may have called us with a bogus ctx, or we could |
| 471 | * have a device that for whatever reason just doesn't |
| 472 | * want to play ball - it's not clear what's right |
| 473 | * here - should this be an error? should it just |
| 474 | * increase a counter, hmm. For right now, we return |
| 475 | * 0 - I don't believe that to be "right". we could |
| 476 | * call the gorpy openssl lib error handlers that |
| 477 | * print messages to users of the library. hmm.. |
| 478 | */ |
| 479 | |
| 480 | if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) == -1) { |
| 481 | ret = 0; |
| 482 | } else { |
| 483 | ret = 1; |
| 484 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 485 | put_dev_crypto(state->d_fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 486 | state->d_fd = -1; |
| 487 | |
| 488 | return (ret); |
| 489 | } |
| 490 | |
| 491 | /* |
| 492 | * libcrypto EVP stuff - this is how we get wired to EVP so the engine |
| 493 | * gets called when libcrypto requests a cipher NID. |
| 494 | */ |
| 495 | |
| 496 | /* RC4 */ |
| 497 | const EVP_CIPHER cryptodev_rc4 = { |
| 498 | NID_rc4, |
| 499 | 1, 16, 0, |
| 500 | EVP_CIPH_VARIABLE_LENGTH, |
| 501 | cryptodev_init_key, |
| 502 | cryptodev_cipher, |
| 503 | cryptodev_cleanup, |
| 504 | sizeof(struct dev_crypto_state), |
| 505 | NULL, |
| 506 | NULL, |
| 507 | NULL |
| 508 | }; |
| 509 | |
| 510 | /* DES CBC EVP */ |
| 511 | const EVP_CIPHER cryptodev_des_cbc = { |
| 512 | NID_des_cbc, |
| 513 | 8, 8, 8, |
| 514 | EVP_CIPH_CBC_MODE, |
| 515 | cryptodev_init_key, |
| 516 | cryptodev_cipher, |
| 517 | cryptodev_cleanup, |
| 518 | sizeof(struct dev_crypto_state), |
| 519 | EVP_CIPHER_set_asn1_iv, |
| 520 | EVP_CIPHER_get_asn1_iv, |
| 521 | NULL |
| 522 | }; |
| 523 | |
| 524 | /* 3DES CBC EVP */ |
| 525 | const EVP_CIPHER cryptodev_3des_cbc = { |
| 526 | NID_des_ede3_cbc, |
| 527 | 8, 24, 8, |
| 528 | EVP_CIPH_CBC_MODE, |
| 529 | cryptodev_init_key, |
| 530 | cryptodev_cipher, |
| 531 | cryptodev_cleanup, |
| 532 | sizeof(struct dev_crypto_state), |
| 533 | EVP_CIPHER_set_asn1_iv, |
| 534 | EVP_CIPHER_get_asn1_iv, |
| 535 | NULL |
| 536 | }; |
| 537 | |
| 538 | const EVP_CIPHER cryptodev_bf_cbc = { |
| 539 | NID_bf_cbc, |
| 540 | 8, 16, 8, |
| 541 | EVP_CIPH_CBC_MODE, |
| 542 | cryptodev_init_key, |
| 543 | cryptodev_cipher, |
| 544 | cryptodev_cleanup, |
| 545 | sizeof(struct dev_crypto_state), |
| 546 | EVP_CIPHER_set_asn1_iv, |
| 547 | EVP_CIPHER_get_asn1_iv, |
| 548 | NULL |
| 549 | }; |
| 550 | |
| 551 | const EVP_CIPHER cryptodev_cast_cbc = { |
| 552 | NID_cast5_cbc, |
| 553 | 8, 16, 8, |
| 554 | EVP_CIPH_CBC_MODE, |
| 555 | cryptodev_init_key, |
| 556 | cryptodev_cipher, |
| 557 | cryptodev_cleanup, |
| 558 | sizeof(struct dev_crypto_state), |
| 559 | EVP_CIPHER_set_asn1_iv, |
| 560 | EVP_CIPHER_get_asn1_iv, |
| 561 | NULL |
| 562 | }; |
| 563 | |
| 564 | const EVP_CIPHER cryptodev_aes_cbc = { |
| 565 | NID_aes_128_cbc, |
| 566 | 16, 16, 16, |
| 567 | EVP_CIPH_CBC_MODE, |
| 568 | cryptodev_init_key, |
| 569 | cryptodev_cipher, |
| 570 | cryptodev_cleanup, |
| 571 | sizeof(struct dev_crypto_state), |
| 572 | EVP_CIPHER_set_asn1_iv, |
| 573 | EVP_CIPHER_get_asn1_iv, |
| 574 | NULL |
| 575 | }; |
| 576 | |
| 577 | const EVP_CIPHER cryptodev_aes_192_cbc = { |
| 578 | NID_aes_192_cbc, |
| 579 | 16, 24, 16, |
| 580 | EVP_CIPH_CBC_MODE, |
| 581 | cryptodev_init_key, |
| 582 | cryptodev_cipher, |
| 583 | cryptodev_cleanup, |
| 584 | sizeof(struct dev_crypto_state), |
| 585 | EVP_CIPHER_set_asn1_iv, |
| 586 | EVP_CIPHER_get_asn1_iv, |
| 587 | NULL |
| 588 | }; |
| 589 | |
| 590 | const EVP_CIPHER cryptodev_aes_256_cbc = { |
| 591 | NID_aes_256_cbc, |
| 592 | 16, 32, 16, |
| 593 | EVP_CIPH_CBC_MODE, |
| 594 | cryptodev_init_key, |
| 595 | cryptodev_cipher, |
| 596 | cryptodev_cleanup, |
| 597 | sizeof(struct dev_crypto_state), |
| 598 | EVP_CIPHER_set_asn1_iv, |
| 599 | EVP_CIPHER_get_asn1_iv, |
| 600 | NULL |
| 601 | }; |
| 602 | |
| 603 | /* |
| 604 | * Registered by the ENGINE when used to find out how to deal with |
| 605 | * a particular NID in the ENGINE. this says what we'll do at the |
| 606 | * top level - note, that list is restricted by what we answer with |
| 607 | */ |
| 608 | static int |
| 609 | cryptodev_engine_ciphers(ENGINE *e, const EVP_CIPHER **cipher, |
| 610 | const int **nids, int nid) |
| 611 | { |
| 612 | if (!cipher) |
| 613 | return (cryptodev_usable_ciphers(nids)); |
| 614 | |
| 615 | switch (nid) { |
| 616 | case NID_rc4: |
| 617 | *cipher = &cryptodev_rc4; |
| 618 | break; |
| 619 | case NID_des_ede3_cbc: |
| 620 | *cipher = &cryptodev_3des_cbc; |
| 621 | break; |
| 622 | case NID_des_cbc: |
| 623 | *cipher = &cryptodev_des_cbc; |
| 624 | break; |
| 625 | case NID_bf_cbc: |
| 626 | *cipher = &cryptodev_bf_cbc; |
| 627 | break; |
| 628 | case NID_cast5_cbc: |
| 629 | *cipher = &cryptodev_cast_cbc; |
| 630 | break; |
| 631 | case NID_aes_128_cbc: |
| 632 | *cipher = &cryptodev_aes_cbc; |
| 633 | break; |
| 634 | case NID_aes_192_cbc: |
| 635 | *cipher = &cryptodev_aes_192_cbc; |
| 636 | break; |
| 637 | case NID_aes_256_cbc: |
| 638 | *cipher = &cryptodev_aes_256_cbc; |
| 639 | break; |
| 640 | default: |
| 641 | *cipher = NULL; |
| 642 | break; |
| 643 | } |
| 644 | return (*cipher != NULL); |
| 645 | } |
| 646 | |
| 647 | |
| 648 | #ifdef USE_CRYPTODEV_DIGESTS |
| 649 | |
| 650 | /* convert digest type to cryptodev */ |
| 651 | static int |
| 652 | digest_nid_to_cryptodev(int nid) |
| 653 | { |
| 654 | int i; |
| 655 | |
| 656 | for (i = 0; digests[i].id; i++) |
| 657 | if (digests[i].nid == nid) |
| 658 | return (digests[i].id); |
| 659 | return (0); |
| 660 | } |
| 661 | |
| 662 | |
| 663 | static int |
| 664 | digest_key_length(int nid) |
| 665 | { |
| 666 | int i; |
| 667 | |
| 668 | for (i = 0; digests[i].id; i++) |
| 669 | if (digests[i].nid == nid) |
| 670 | return digests[i].keylen; |
| 671 | return (0); |
| 672 | } |
| 673 | |
| 674 | |
| 675 | static int cryptodev_digest_init(EVP_MD_CTX *ctx) |
| 676 | { |
| 677 | struct dev_crypto_state *state = ctx->md_data; |
| 678 | struct session_op *sess = &state->d_sess; |
| 679 | int digest; |
| 680 | |
| 681 | if ((digest = digest_nid_to_cryptodev(ctx->digest->type)) == NID_undef){ |
| 682 | printf("cryptodev_digest_init: Can't get digest \n"); |
| 683 | return (0); |
| 684 | } |
| 685 | |
| 686 | memset(state, 0, sizeof(struct dev_crypto_state)); |
| 687 | |
| 688 | if ((state->d_fd = get_dev_crypto()) < 0) { |
| 689 | printf("cryptodev_digest_init: Can't get Dev \n"); |
| 690 | return (0); |
| 691 | } |
| 692 | |
| 693 | sess->mackey = state->dummy_mac_key; |
| 694 | sess->mackeylen = digest_key_length(ctx->digest->type); |
| 695 | sess->mac = digest; |
| 696 | |
| 697 | if (ioctl(state->d_fd, CIOCGSESSION, sess) < 0) { |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 698 | put_dev_crypto(state->d_fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 699 | state->d_fd = -1; |
| 700 | printf("cryptodev_digest_init: Open session failed\n"); |
| 701 | return (0); |
| 702 | } |
| 703 | |
| 704 | return (1); |
| 705 | } |
| 706 | |
| 707 | static int cryptodev_digest_update(EVP_MD_CTX *ctx, const void *data, |
| 708 | size_t count) |
| 709 | { |
| 710 | struct crypt_op cryp; |
| 711 | struct dev_crypto_state *state = ctx->md_data; |
| 712 | struct session_op *sess = &state->d_sess; |
| 713 | |
| 714 | if (!data || state->d_fd < 0) { |
| 715 | printf("cryptodev_digest_update: illegal inputs \n"); |
| 716 | return (0); |
| 717 | } |
| 718 | |
| 719 | if (!count) { |
| 720 | return (0); |
| 721 | } |
| 722 | |
| 723 | if (!(ctx->flags & EVP_MD_CTX_FLAG_ONESHOT)) { |
| 724 | /* if application doesn't support one buffer */ |
| 725 | state->mac_data = OPENSSL_realloc(state->mac_data, state->mac_len + count); |
| 726 | |
| 727 | if (!state->mac_data) { |
| 728 | printf("cryptodev_digest_update: realloc failed\n"); |
| 729 | return (0); |
| 730 | } |
| 731 | |
| 732 | memcpy(state->mac_data + state->mac_len, data, count); |
| 733 | state->mac_len += count; |
| 734 | |
| 735 | return (1); |
| 736 | } |
| 737 | |
| 738 | memset(&cryp, 0, sizeof(cryp)); |
| 739 | |
| 740 | cryp.ses = sess->ses; |
| 741 | cryp.flags = 0; |
| 742 | cryp.len = count; |
| 743 | cryp.src = (caddr_t) data; |
| 744 | cryp.dst = NULL; |
| 745 | cryp.mac = (caddr_t) state->digest_res; |
| 746 | if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) { |
| 747 | printf("cryptodev_digest_update: digest failed\n"); |
| 748 | return (0); |
| 749 | } |
| 750 | return (1); |
| 751 | } |
| 752 | |
| 753 | |
| 754 | static int cryptodev_digest_final(EVP_MD_CTX *ctx, unsigned char *md) |
| 755 | { |
| 756 | struct crypt_op cryp; |
| 757 | struct dev_crypto_state *state = ctx->md_data; |
| 758 | struct session_op *sess = &state->d_sess; |
| 759 | |
| 760 | int ret = 1; |
| 761 | |
| 762 | if (!md || state->d_fd < 0) { |
| 763 | printf("cryptodev_digest_final: illegal input\n"); |
| 764 | return(0); |
| 765 | } |
| 766 | |
| 767 | if (! (ctx->flags & EVP_MD_CTX_FLAG_ONESHOT) ) { |
| 768 | /* if application doesn't support one buffer */ |
| 769 | memset(&cryp, 0, sizeof(cryp)); |
| 770 | cryp.ses = sess->ses; |
| 771 | cryp.flags = 0; |
| 772 | cryp.len = state->mac_len; |
| 773 | cryp.src = state->mac_data; |
| 774 | cryp.dst = NULL; |
| 775 | cryp.mac = (caddr_t)md; |
| 776 | if (ioctl(state->d_fd, CIOCCRYPT, &cryp) < 0) { |
| 777 | printf("cryptodev_digest_final: digest failed\n"); |
| 778 | return (0); |
| 779 | } |
| 780 | |
| 781 | return 1; |
| 782 | } |
| 783 | |
| 784 | memcpy(md, state->digest_res, ctx->digest->md_size); |
| 785 | |
| 786 | return (ret); |
| 787 | } |
| 788 | |
| 789 | |
| 790 | static int cryptodev_digest_cleanup(EVP_MD_CTX *ctx) |
| 791 | { |
| 792 | int ret = 1; |
| 793 | struct dev_crypto_state *state = ctx->md_data; |
| 794 | struct session_op *sess = &state->d_sess; |
| 795 | |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 796 | if (state == NULL) |
| 797 | return 0; |
| 798 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 799 | if (state->d_fd < 0) { |
| 800 | printf("cryptodev_digest_cleanup: illegal input\n"); |
| 801 | return (0); |
| 802 | } |
| 803 | |
| 804 | if (state->mac_data) { |
| 805 | OPENSSL_free(state->mac_data); |
| 806 | state->mac_data = NULL; |
| 807 | state->mac_len = 0; |
| 808 | } |
| 809 | |
| 810 | if (ioctl(state->d_fd, CIOCFSESSION, &sess->ses) < 0) { |
| 811 | printf("cryptodev_digest_cleanup: failed to close session\n"); |
| 812 | ret = 0; |
| 813 | } else { |
| 814 | ret = 1; |
| 815 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 816 | put_dev_crypto(state->d_fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 817 | state->d_fd = -1; |
| 818 | |
| 819 | return (ret); |
| 820 | } |
| 821 | |
| 822 | static int cryptodev_digest_copy(EVP_MD_CTX *to,const EVP_MD_CTX *from) |
| 823 | { |
| 824 | struct dev_crypto_state *fstate = from->md_data; |
| 825 | struct dev_crypto_state *dstate = to->md_data; |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 826 | struct session_op *sess; |
| 827 | int digest; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 828 | |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 829 | if (dstate == NULL || fstate == NULL) |
| 830 | return 1; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 831 | |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 832 | memcpy(dstate, fstate, sizeof(struct dev_crypto_state)); |
| 833 | |
| 834 | sess = &dstate->d_sess; |
| 835 | |
| 836 | digest = digest_nid_to_cryptodev(to->digest->type); |
| 837 | |
| 838 | sess->mackey = dstate->dummy_mac_key; |
| 839 | sess->mackeylen = digest_key_length(to->digest->type); |
| 840 | sess->mac = digest; |
| 841 | |
| 842 | dstate->d_fd = get_dev_crypto(); |
| 843 | |
| 844 | if (ioctl(dstate->d_fd, CIOCGSESSION, sess) < 0) { |
| 845 | put_dev_crypto(dstate->d_fd); |
| 846 | dstate->d_fd = -1; |
| 847 | printf("cryptodev_digest_init: Open session failed\n"); |
| 848 | return (0); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 849 | } |
| 850 | |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 851 | if (fstate->mac_len != 0) { |
| 852 | if (fstate->mac_data != NULL) |
| 853 | { |
| 854 | dstate->mac_data = OPENSSL_malloc(fstate->mac_len); |
| 855 | memcpy(dstate->mac_data, fstate->mac_data, fstate->mac_len); |
| 856 | dstate->mac_len = fstate->mac_len; |
| 857 | } |
| 858 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 859 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 860 | return 1; |
| 861 | } |
| 862 | |
| 863 | |
| 864 | const EVP_MD cryptodev_sha1 = { |
| 865 | NID_sha1, |
| 866 | NID_undef, |
| 867 | SHA_DIGEST_LENGTH, |
| 868 | EVP_MD_FLAG_ONESHOT, |
| 869 | cryptodev_digest_init, |
| 870 | cryptodev_digest_update, |
| 871 | cryptodev_digest_final, |
| 872 | cryptodev_digest_copy, |
| 873 | cryptodev_digest_cleanup, |
| 874 | EVP_PKEY_NULL_method, |
| 875 | SHA_CBLOCK, |
| 876 | sizeof(struct dev_crypto_state), |
| 877 | }; |
| 878 | |
| 879 | const EVP_MD cryptodev_md5 = { |
| 880 | NID_md5, |
| 881 | NID_undef, |
| 882 | 16 /* MD5_DIGEST_LENGTH */, |
| 883 | EVP_MD_FLAG_ONESHOT, |
| 884 | cryptodev_digest_init, |
| 885 | cryptodev_digest_update, |
| 886 | cryptodev_digest_final, |
| 887 | cryptodev_digest_copy, |
| 888 | cryptodev_digest_cleanup, |
| 889 | EVP_PKEY_NULL_method, |
| 890 | 64 /* MD5_CBLOCK */, |
| 891 | sizeof(struct dev_crypto_state), |
| 892 | }; |
| 893 | |
| 894 | #endif /* USE_CRYPTODEV_DIGESTS */ |
| 895 | |
| 896 | |
| 897 | static int |
| 898 | cryptodev_engine_digests(ENGINE *e, const EVP_MD **digest, |
| 899 | const int **nids, int nid) |
| 900 | { |
| 901 | if (!digest) |
| 902 | return (cryptodev_usable_digests(nids)); |
| 903 | |
| 904 | switch (nid) { |
| 905 | #ifdef USE_CRYPTODEV_DIGESTS |
| 906 | case NID_md5: |
| 907 | *digest = &cryptodev_md5; |
| 908 | break; |
| 909 | case NID_sha1: |
| 910 | *digest = &cryptodev_sha1; |
| 911 | break; |
| 912 | default: |
| 913 | #endif /* USE_CRYPTODEV_DIGESTS */ |
| 914 | *digest = NULL; |
| 915 | break; |
| 916 | } |
| 917 | return (*digest != NULL); |
| 918 | } |
| 919 | |
| 920 | /* |
| 921 | * Convert a BIGNUM to the representation that /dev/crypto needs. |
| 922 | * Upon completion of use, the caller is responsible for freeing |
| 923 | * crp->crp_p. |
| 924 | */ |
| 925 | static int |
| 926 | bn2crparam(const BIGNUM *a, struct crparam *crp) |
| 927 | { |
| 928 | int i, j, k; |
| 929 | ssize_t bytes, bits; |
| 930 | u_char *b; |
| 931 | |
| 932 | crp->crp_p = NULL; |
| 933 | crp->crp_nbits = 0; |
| 934 | |
| 935 | bits = BN_num_bits(a); |
| 936 | bytes = (bits + 7) / 8; |
| 937 | |
| 938 | b = malloc(bytes); |
| 939 | if (b == NULL) |
| 940 | return (1); |
| 941 | memset(b, 0, bytes); |
| 942 | |
| 943 | crp->crp_p = (caddr_t) b; |
| 944 | crp->crp_nbits = bits; |
| 945 | |
| 946 | for (i = 0, j = 0; i < a->top; i++) { |
| 947 | for (k = 0; k < BN_BITS2 / 8; k++) { |
| 948 | if ((j + k) >= bytes) |
| 949 | return (0); |
| 950 | b[j + k] = a->d[i] >> (k * 8); |
| 951 | } |
| 952 | j += BN_BITS2 / 8; |
| 953 | } |
| 954 | return (0); |
| 955 | } |
| 956 | |
| 957 | /* Convert a /dev/crypto parameter to a BIGNUM */ |
| 958 | static int |
| 959 | crparam2bn(struct crparam *crp, BIGNUM *a) |
| 960 | { |
| 961 | u_int8_t *pd; |
| 962 | int i, bytes; |
| 963 | |
| 964 | bytes = (crp->crp_nbits + 7) / 8; |
| 965 | |
| 966 | if (bytes == 0) |
| 967 | return (-1); |
| 968 | |
| 969 | if ((pd = (u_int8_t *) malloc(bytes)) == NULL) |
| 970 | return (-1); |
| 971 | |
| 972 | for (i = 0; i < bytes; i++) |
| 973 | pd[i] = crp->crp_p[bytes - i - 1]; |
| 974 | |
| 975 | BN_bin2bn(pd, bytes, a); |
| 976 | free(pd); |
| 977 | |
| 978 | return (0); |
| 979 | } |
| 980 | |
| 981 | static void |
| 982 | zapparams(struct crypt_kop *kop) |
| 983 | { |
| 984 | int i; |
| 985 | |
| 986 | for (i = 0; i < kop->crk_iparams + kop->crk_oparams; i++) { |
| 987 | if (kop->crk_param[i].crp_p) |
| 988 | free(kop->crk_param[i].crp_p); |
| 989 | kop->crk_param[i].crp_p = NULL; |
| 990 | kop->crk_param[i].crp_nbits = 0; |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | static int |
| 995 | cryptodev_asym(struct crypt_kop *kop, int rlen, BIGNUM *r, int slen, BIGNUM *s) |
| 996 | { |
| 997 | int fd, ret = -1; |
| 998 | |
| 999 | if ((fd = get_asym_dev_crypto()) < 0) |
| 1000 | return (ret); |
| 1001 | |
| 1002 | if (r) { |
| 1003 | kop->crk_param[kop->crk_iparams].crp_p = calloc(rlen, sizeof(char)); |
| 1004 | kop->crk_param[kop->crk_iparams].crp_nbits = rlen * 8; |
| 1005 | kop->crk_oparams++; |
| 1006 | } |
| 1007 | if (s) { |
| 1008 | kop->crk_param[kop->crk_iparams+1].crp_p = calloc(slen, sizeof(char)); |
| 1009 | kop->crk_param[kop->crk_iparams+1].crp_nbits = slen * 8; |
| 1010 | kop->crk_oparams++; |
| 1011 | } |
| 1012 | |
| 1013 | if (ioctl(fd, CIOCKEY, kop) == 0) { |
| 1014 | if (r) |
| 1015 | crparam2bn(&kop->crk_param[kop->crk_iparams], r); |
| 1016 | if (s) |
| 1017 | crparam2bn(&kop->crk_param[kop->crk_iparams+1], s); |
| 1018 | ret = 0; |
| 1019 | } |
| 1020 | |
| 1021 | return (ret); |
| 1022 | } |
| 1023 | |
| 1024 | static int |
| 1025 | cryptodev_bn_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, |
| 1026 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont) |
| 1027 | { |
| 1028 | struct crypt_kop kop; |
| 1029 | int ret = 1; |
| 1030 | |
| 1031 | /* Currently, we know we can do mod exp iff we can do any |
| 1032 | * asymmetric operations at all. |
| 1033 | */ |
| 1034 | if (cryptodev_asymfeat == 0) { |
| 1035 | ret = BN_mod_exp(r, a, p, m, ctx); |
| 1036 | return (ret); |
| 1037 | } |
| 1038 | |
| 1039 | memset(&kop, 0, sizeof kop); |
| 1040 | kop.crk_op = CRK_MOD_EXP; |
| 1041 | |
| 1042 | /* inputs: a^p % m */ |
| 1043 | if (bn2crparam(a, &kop.crk_param[0])) |
| 1044 | goto err; |
| 1045 | if (bn2crparam(p, &kop.crk_param[1])) |
| 1046 | goto err; |
| 1047 | if (bn2crparam(m, &kop.crk_param[2])) |
| 1048 | goto err; |
| 1049 | kop.crk_iparams = 3; |
| 1050 | |
| 1051 | if (cryptodev_asym(&kop, BN_num_bytes(m), r, 0, NULL)) { |
| 1052 | const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| 1053 | printf("OCF asym process failed, Running in software\n"); |
| 1054 | ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont); |
| 1055 | |
| 1056 | } else if (ECANCELED == kop.crk_status) { |
| 1057 | const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| 1058 | printf("OCF hardware operation cancelled. Running in Software\n"); |
| 1059 | ret = meth->bn_mod_exp(r, a, p, m, ctx, in_mont); |
| 1060 | } |
| 1061 | /* else cryptodev operation worked ok ==> ret = 1*/ |
| 1062 | |
| 1063 | err: |
| 1064 | zapparams(&kop); |
| 1065 | return (ret); |
| 1066 | } |
| 1067 | |
| 1068 | static int |
| 1069 | cryptodev_rsa_nocrt_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
| 1070 | { |
| 1071 | int r; |
| 1072 | ctx = BN_CTX_new(); |
| 1073 | r = cryptodev_bn_mod_exp(r0, I, rsa->d, rsa->n, ctx, NULL); |
| 1074 | BN_CTX_free(ctx); |
| 1075 | return (r); |
| 1076 | } |
| 1077 | |
| 1078 | static int |
| 1079 | cryptodev_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx) |
| 1080 | { |
| 1081 | struct crypt_kop kop; |
| 1082 | int ret = 1; |
| 1083 | |
| 1084 | if (!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp) { |
| 1085 | /* XXX 0 means failure?? */ |
| 1086 | return (0); |
| 1087 | } |
| 1088 | |
| 1089 | memset(&kop, 0, sizeof kop); |
| 1090 | kop.crk_op = CRK_MOD_EXP_CRT; |
| 1091 | /* inputs: rsa->p rsa->q I rsa->dmp1 rsa->dmq1 rsa->iqmp */ |
| 1092 | if (bn2crparam(rsa->p, &kop.crk_param[0])) |
| 1093 | goto err; |
| 1094 | if (bn2crparam(rsa->q, &kop.crk_param[1])) |
| 1095 | goto err; |
| 1096 | if (bn2crparam(I, &kop.crk_param[2])) |
| 1097 | goto err; |
| 1098 | if (bn2crparam(rsa->dmp1, &kop.crk_param[3])) |
| 1099 | goto err; |
| 1100 | if (bn2crparam(rsa->dmq1, &kop.crk_param[4])) |
| 1101 | goto err; |
| 1102 | if (bn2crparam(rsa->iqmp, &kop.crk_param[5])) |
| 1103 | goto err; |
| 1104 | kop.crk_iparams = 6; |
| 1105 | |
| 1106 | if (cryptodev_asym(&kop, BN_num_bytes(rsa->n), r0, 0, NULL)) { |
| 1107 | const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| 1108 | printf("OCF asym process failed, running in Software\n"); |
| 1109 | ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx); |
| 1110 | |
| 1111 | } else if (ECANCELED == kop.crk_status) { |
| 1112 | const RSA_METHOD *meth = RSA_PKCS1_SSLeay(); |
| 1113 | printf("OCF hardware operation cancelled. Running in Software\n"); |
| 1114 | ret = (*meth->rsa_mod_exp)(r0, I, rsa, ctx); |
| 1115 | } |
| 1116 | /* else cryptodev operation worked ok ==> ret = 1*/ |
| 1117 | |
| 1118 | err: |
| 1119 | zapparams(&kop); |
| 1120 | return (ret); |
| 1121 | } |
| 1122 | |
| 1123 | static RSA_METHOD cryptodev_rsa = { |
| 1124 | "cryptodev RSA method", |
| 1125 | NULL, /* rsa_pub_enc */ |
| 1126 | NULL, /* rsa_pub_dec */ |
| 1127 | NULL, /* rsa_priv_enc */ |
| 1128 | NULL, /* rsa_priv_dec */ |
| 1129 | NULL, |
| 1130 | NULL, |
| 1131 | NULL, /* init */ |
| 1132 | NULL, /* finish */ |
| 1133 | 0, /* flags */ |
| 1134 | NULL, /* app_data */ |
| 1135 | NULL, /* rsa_sign */ |
| 1136 | NULL /* rsa_verify */ |
| 1137 | }; |
| 1138 | |
| 1139 | static int |
| 1140 | cryptodev_dsa_bn_mod_exp(DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, |
| 1141 | const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx) |
| 1142 | { |
| 1143 | return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx)); |
| 1144 | } |
| 1145 | |
| 1146 | static int |
| 1147 | cryptodev_dsa_dsa_mod_exp(DSA *dsa, BIGNUM *t1, BIGNUM *g, |
| 1148 | BIGNUM *u1, BIGNUM *pub_key, BIGNUM *u2, BIGNUM *p, |
| 1149 | BN_CTX *ctx, BN_MONT_CTX *mont) |
| 1150 | { |
| 1151 | BIGNUM t2; |
| 1152 | int ret = 0; |
| 1153 | |
| 1154 | BN_init(&t2); |
| 1155 | |
| 1156 | /* v = ( g^u1 * y^u2 mod p ) mod q */ |
| 1157 | /* let t1 = g ^ u1 mod p */ |
| 1158 | ret = 0; |
| 1159 | |
| 1160 | if (!dsa->meth->bn_mod_exp(dsa,t1,dsa->g,u1,dsa->p,ctx,mont)) |
| 1161 | goto err; |
| 1162 | |
| 1163 | /* let t2 = y ^ u2 mod p */ |
| 1164 | if (!dsa->meth->bn_mod_exp(dsa,&t2,dsa->pub_key,u2,dsa->p,ctx,mont)) |
| 1165 | goto err; |
| 1166 | /* let u1 = t1 * t2 mod p */ |
| 1167 | if (!BN_mod_mul(u1,t1,&t2,dsa->p,ctx)) |
| 1168 | goto err; |
| 1169 | |
| 1170 | BN_copy(t1,u1); |
| 1171 | |
| 1172 | ret = 1; |
| 1173 | err: |
| 1174 | BN_free(&t2); |
| 1175 | return(ret); |
| 1176 | } |
| 1177 | |
| 1178 | static DSA_SIG * |
| 1179 | cryptodev_dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa) |
| 1180 | { |
| 1181 | struct crypt_kop kop; |
| 1182 | BIGNUM *r = NULL, *s = NULL; |
| 1183 | DSA_SIG *dsaret = NULL; |
| 1184 | |
| 1185 | if ((r = BN_new()) == NULL) |
| 1186 | goto err; |
| 1187 | if ((s = BN_new()) == NULL) { |
| 1188 | BN_free(r); |
| 1189 | goto err; |
| 1190 | } |
| 1191 | |
| 1192 | memset(&kop, 0, sizeof kop); |
| 1193 | kop.crk_op = CRK_DSA_SIGN; |
| 1194 | |
| 1195 | /* inputs: dgst dsa->p dsa->q dsa->g dsa->priv_key */ |
| 1196 | kop.crk_param[0].crp_p = (caddr_t)dgst; |
| 1197 | kop.crk_param[0].crp_nbits = dlen * 8; |
| 1198 | if (bn2crparam(dsa->p, &kop.crk_param[1])) |
| 1199 | goto err; |
| 1200 | if (bn2crparam(dsa->q, &kop.crk_param[2])) |
| 1201 | goto err; |
| 1202 | if (bn2crparam(dsa->g, &kop.crk_param[3])) |
| 1203 | goto err; |
| 1204 | if (bn2crparam(dsa->priv_key, &kop.crk_param[4])) |
| 1205 | goto err; |
| 1206 | kop.crk_iparams = 5; |
| 1207 | |
| 1208 | if (cryptodev_asym(&kop, BN_num_bytes(dsa->q), r, |
| 1209 | BN_num_bytes(dsa->q), s) == 0) { |
| 1210 | dsaret = DSA_SIG_new(); |
| 1211 | dsaret->r = r; |
| 1212 | dsaret->s = s; |
| 1213 | } else { |
| 1214 | const DSA_METHOD *meth = DSA_OpenSSL(); |
| 1215 | BN_free(r); |
| 1216 | BN_free(s); |
| 1217 | dsaret = (meth->dsa_do_sign)(dgst, dlen, dsa); |
| 1218 | } |
| 1219 | err: |
| 1220 | kop.crk_param[0].crp_p = NULL; |
| 1221 | zapparams(&kop); |
| 1222 | return (dsaret); |
| 1223 | } |
| 1224 | |
| 1225 | static int |
| 1226 | cryptodev_dsa_verify(const unsigned char *dgst, int dlen, |
| 1227 | DSA_SIG *sig, DSA *dsa) |
| 1228 | { |
| 1229 | struct crypt_kop kop; |
| 1230 | int dsaret = 1; |
| 1231 | |
| 1232 | memset(&kop, 0, sizeof kop); |
| 1233 | kop.crk_op = CRK_DSA_VERIFY; |
| 1234 | |
| 1235 | /* inputs: dgst dsa->p dsa->q dsa->g dsa->pub_key sig->r sig->s */ |
| 1236 | kop.crk_param[0].crp_p = (caddr_t)dgst; |
| 1237 | kop.crk_param[0].crp_nbits = dlen * 8; |
| 1238 | if (bn2crparam(dsa->p, &kop.crk_param[1])) |
| 1239 | goto err; |
| 1240 | if (bn2crparam(dsa->q, &kop.crk_param[2])) |
| 1241 | goto err; |
| 1242 | if (bn2crparam(dsa->g, &kop.crk_param[3])) |
| 1243 | goto err; |
| 1244 | if (bn2crparam(dsa->pub_key, &kop.crk_param[4])) |
| 1245 | goto err; |
| 1246 | if (bn2crparam(sig->r, &kop.crk_param[5])) |
| 1247 | goto err; |
| 1248 | if (bn2crparam(sig->s, &kop.crk_param[6])) |
| 1249 | goto err; |
| 1250 | kop.crk_iparams = 7; |
| 1251 | |
| 1252 | if (cryptodev_asym(&kop, 0, NULL, 0, NULL) == 0) { |
| 1253 | /*OCF success value is 0, if not zero, change dsaret to fail*/ |
| 1254 | if(0 != kop.crk_status) dsaret = 0; |
| 1255 | } else { |
| 1256 | const DSA_METHOD *meth = DSA_OpenSSL(); |
| 1257 | |
| 1258 | dsaret = (meth->dsa_do_verify)(dgst, dlen, sig, dsa); |
| 1259 | } |
| 1260 | err: |
| 1261 | kop.crk_param[0].crp_p = NULL; |
| 1262 | zapparams(&kop); |
| 1263 | return (dsaret); |
| 1264 | } |
| 1265 | |
| 1266 | static DSA_METHOD cryptodev_dsa = { |
| 1267 | "cryptodev DSA method", |
| 1268 | NULL, |
| 1269 | NULL, /* dsa_sign_setup */ |
| 1270 | NULL, |
| 1271 | NULL, /* dsa_mod_exp */ |
| 1272 | NULL, |
| 1273 | NULL, /* init */ |
| 1274 | NULL, /* finish */ |
| 1275 | 0, /* flags */ |
| 1276 | NULL /* app_data */ |
| 1277 | }; |
| 1278 | |
| 1279 | static int |
| 1280 | cryptodev_mod_exp_dh(const DH *dh, BIGNUM *r, const BIGNUM *a, |
| 1281 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, |
| 1282 | BN_MONT_CTX *m_ctx) |
| 1283 | { |
| 1284 | return (cryptodev_bn_mod_exp(r, a, p, m, ctx, m_ctx)); |
| 1285 | } |
| 1286 | |
| 1287 | static int |
| 1288 | cryptodev_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) |
| 1289 | { |
| 1290 | struct crypt_kop kop; |
| 1291 | int dhret = 1; |
| 1292 | int fd, keylen; |
| 1293 | |
| 1294 | if ((fd = get_asym_dev_crypto()) < 0) { |
| 1295 | const DH_METHOD *meth = DH_OpenSSL(); |
| 1296 | |
| 1297 | return ((meth->compute_key)(key, pub_key, dh)); |
| 1298 | } |
| 1299 | |
| 1300 | keylen = BN_num_bits(dh->p); |
| 1301 | |
| 1302 | memset(&kop, 0, sizeof kop); |
| 1303 | kop.crk_op = CRK_DH_COMPUTE_KEY; |
| 1304 | |
| 1305 | /* inputs: dh->priv_key pub_key dh->p key */ |
| 1306 | if (bn2crparam(dh->priv_key, &kop.crk_param[0])) |
| 1307 | goto err; |
| 1308 | if (bn2crparam(pub_key, &kop.crk_param[1])) |
| 1309 | goto err; |
| 1310 | if (bn2crparam(dh->p, &kop.crk_param[2])) |
| 1311 | goto err; |
| 1312 | kop.crk_iparams = 3; |
| 1313 | |
| 1314 | kop.crk_param[3].crp_p = (caddr_t) key; |
| 1315 | kop.crk_param[3].crp_nbits = keylen * 8; |
| 1316 | kop.crk_oparams = 1; |
| 1317 | |
| 1318 | if (ioctl(fd, CIOCKEY, &kop) == -1) { |
| 1319 | const DH_METHOD *meth = DH_OpenSSL(); |
| 1320 | |
| 1321 | dhret = (meth->compute_key)(key, pub_key, dh); |
| 1322 | } |
| 1323 | err: |
| 1324 | kop.crk_param[3].crp_p = NULL; |
| 1325 | zapparams(&kop); |
| 1326 | return (dhret); |
| 1327 | } |
| 1328 | |
| 1329 | static DH_METHOD cryptodev_dh = { |
| 1330 | "cryptodev DH method", |
| 1331 | NULL, /* cryptodev_dh_generate_key */ |
| 1332 | NULL, |
| 1333 | NULL, |
| 1334 | NULL, |
| 1335 | NULL, |
| 1336 | 0, /* flags */ |
| 1337 | NULL /* app_data */ |
| 1338 | }; |
| 1339 | |
| 1340 | /* |
| 1341 | * ctrl right now is just a wrapper that doesn't do much |
| 1342 | * but I expect we'll want some options soon. |
| 1343 | */ |
| 1344 | static int |
| 1345 | cryptodev_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void)) |
| 1346 | { |
| 1347 | #ifdef HAVE_SYSLOG_R |
| 1348 | struct syslog_data sd = SYSLOG_DATA_INIT; |
| 1349 | #endif |
| 1350 | |
| 1351 | switch (cmd) { |
| 1352 | default: |
| 1353 | #ifdef HAVE_SYSLOG_R |
| 1354 | syslog_r(LOG_ERR, &sd, |
| 1355 | "cryptodev_ctrl: unknown command %d", cmd); |
| 1356 | #else |
| 1357 | syslog(LOG_ERR, "cryptodev_ctrl: unknown command %d", cmd); |
| 1358 | #endif |
| 1359 | break; |
| 1360 | } |
| 1361 | return (1); |
| 1362 | } |
| 1363 | |
| 1364 | void |
| 1365 | ENGINE_load_cryptodev(void) |
| 1366 | { |
| 1367 | ENGINE *engine = ENGINE_new(); |
| 1368 | int fd; |
| 1369 | |
| 1370 | if (engine == NULL) |
| 1371 | return; |
| 1372 | if ((fd = get_dev_crypto()) < 0) { |
| 1373 | ENGINE_free(engine); |
| 1374 | return; |
| 1375 | } |
| 1376 | |
| 1377 | /* |
| 1378 | * find out what asymmetric crypto algorithms we support |
| 1379 | */ |
| 1380 | if (ioctl(fd, CIOCASYMFEAT, &cryptodev_asymfeat) == -1) { |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 1381 | put_dev_crypto(fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1382 | ENGINE_free(engine); |
| 1383 | return; |
| 1384 | } |
Alexandre Lision | f26d3e5 | 2014-04-14 16:22:31 -0400 | [diff] [blame] | 1385 | put_dev_crypto(fd); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1386 | |
| 1387 | if (!ENGINE_set_id(engine, "cryptodev") || |
| 1388 | !ENGINE_set_name(engine, "BSD cryptodev engine") || |
| 1389 | !ENGINE_set_ciphers(engine, cryptodev_engine_ciphers) || |
| 1390 | !ENGINE_set_digests(engine, cryptodev_engine_digests) || |
| 1391 | !ENGINE_set_ctrl_function(engine, cryptodev_ctrl) || |
| 1392 | !ENGINE_set_cmd_defns(engine, cryptodev_defns)) { |
| 1393 | ENGINE_free(engine); |
| 1394 | return; |
| 1395 | } |
| 1396 | |
| 1397 | if (ENGINE_set_RSA(engine, &cryptodev_rsa)) { |
| 1398 | const RSA_METHOD *rsa_meth = RSA_PKCS1_SSLeay(); |
| 1399 | |
| 1400 | cryptodev_rsa.bn_mod_exp = rsa_meth->bn_mod_exp; |
| 1401 | cryptodev_rsa.rsa_mod_exp = rsa_meth->rsa_mod_exp; |
| 1402 | cryptodev_rsa.rsa_pub_enc = rsa_meth->rsa_pub_enc; |
| 1403 | cryptodev_rsa.rsa_pub_dec = rsa_meth->rsa_pub_dec; |
| 1404 | cryptodev_rsa.rsa_priv_enc = rsa_meth->rsa_priv_enc; |
| 1405 | cryptodev_rsa.rsa_priv_dec = rsa_meth->rsa_priv_dec; |
| 1406 | if (cryptodev_asymfeat & CRF_MOD_EXP) { |
| 1407 | cryptodev_rsa.bn_mod_exp = cryptodev_bn_mod_exp; |
| 1408 | if (cryptodev_asymfeat & CRF_MOD_EXP_CRT) |
| 1409 | cryptodev_rsa.rsa_mod_exp = |
| 1410 | cryptodev_rsa_mod_exp; |
| 1411 | else |
| 1412 | cryptodev_rsa.rsa_mod_exp = |
| 1413 | cryptodev_rsa_nocrt_mod_exp; |
| 1414 | } |
| 1415 | } |
| 1416 | |
| 1417 | if (ENGINE_set_DSA(engine, &cryptodev_dsa)) { |
| 1418 | const DSA_METHOD *meth = DSA_OpenSSL(); |
| 1419 | |
| 1420 | memcpy(&cryptodev_dsa, meth, sizeof(DSA_METHOD)); |
| 1421 | if (cryptodev_asymfeat & CRF_DSA_SIGN) |
| 1422 | cryptodev_dsa.dsa_do_sign = cryptodev_dsa_do_sign; |
| 1423 | if (cryptodev_asymfeat & CRF_MOD_EXP) { |
| 1424 | cryptodev_dsa.bn_mod_exp = cryptodev_dsa_bn_mod_exp; |
| 1425 | cryptodev_dsa.dsa_mod_exp = cryptodev_dsa_dsa_mod_exp; |
| 1426 | } |
| 1427 | if (cryptodev_asymfeat & CRF_DSA_VERIFY) |
| 1428 | cryptodev_dsa.dsa_do_verify = cryptodev_dsa_verify; |
| 1429 | } |
| 1430 | |
| 1431 | if (ENGINE_set_DH(engine, &cryptodev_dh)){ |
| 1432 | const DH_METHOD *dh_meth = DH_OpenSSL(); |
| 1433 | |
| 1434 | cryptodev_dh.generate_key = dh_meth->generate_key; |
| 1435 | cryptodev_dh.compute_key = dh_meth->compute_key; |
| 1436 | cryptodev_dh.bn_mod_exp = dh_meth->bn_mod_exp; |
| 1437 | if (cryptodev_asymfeat & CRF_MOD_EXP) { |
| 1438 | cryptodev_dh.bn_mod_exp = cryptodev_mod_exp_dh; |
| 1439 | if (cryptodev_asymfeat & CRF_DH_COMPUTE_KEY) |
| 1440 | cryptodev_dh.compute_key = |
| 1441 | cryptodev_dh_compute_key; |
| 1442 | } |
| 1443 | } |
| 1444 | |
| 1445 | ENGINE_add(engine); |
| 1446 | ENGINE_free(engine); |
| 1447 | ERR_clear_error(); |
| 1448 | } |
| 1449 | |
| 1450 | #endif /* HAVE_CRYPTODEV */ |