crypto/engine/eng_openssl.c

   1 /*
   2  * Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 /* We need to use some engine deprecated APIs */
  12 #define OPENSSL_SUPPRESS_DEPRECATED
  13
  14 /*
  15  * RC4 and SHA-1 low level APIs and EVP _meth_ APISs are deprecated for public
  16  * use, but still ok for internal use.
  17  */
  18 #include "internal/deprecated.h"
  19
  20 #include <stdio.h>
  21 #include <openssl/crypto.h>
  22 #include "internal/cryptlib.h"
  23 #include "crypto/engine.h"
  24 #include <openssl/pem.h>
  25 #include <openssl/evp.h>
  26 #include <openssl/rand.h>
  27 #include <openssl/rsa.h>
  28 #include <openssl/dsa.h>
  29 #include <openssl/dh.h>
  30
  31 #include <openssl/hmac.h>
  32 #include <openssl/x509v3.h>
  33
  34 /*
  35  * This testing gunk is implemented (and explained) lower down. It also
  36  * assumes the application explicitly calls "ENGINE_load_openssl()" because
  37  * this is no longer automatic in ENGINE_load_builtin_engines().
  38  */
  39 #define TEST_ENG_OPENSSL_RC4
  40 #ifndef OPENSSL_NO_STDIO
  41 # define TEST_ENG_OPENSSL_PKEY
  42 #endif
  43 /* #define TEST_ENG_OPENSSL_HMAC */
  44 /* #define TEST_ENG_OPENSSL_HMAC_INIT */
  45 /* #define TEST_ENG_OPENSSL_RC4_OTHERS */
  46 #ifndef OPENSSL_NO_STDIO
  47 # define TEST_ENG_OPENSSL_RC4_P_INIT
  48 #endif
  49 /* #define TEST_ENG_OPENSSL_RC4_P_CIPHER */
  50 #define TEST_ENG_OPENSSL_SHA
  51 /* #define TEST_ENG_OPENSSL_SHA_OTHERS */
  52 /* #define TEST_ENG_OPENSSL_SHA_P_INIT */
  53 /* #define TEST_ENG_OPENSSL_SHA_P_UPDATE */
  54 /* #define TEST_ENG_OPENSSL_SHA_P_FINAL */
  55
  56 /* Now check what of those algorithms are actually enabled */
  57 #ifdef OPENSSL_NO_RC4
  58 # undef TEST_ENG_OPENSSL_RC4
  59 # undef TEST_ENG_OPENSSL_RC4_OTHERS
  60 # undef TEST_ENG_OPENSSL_RC4_P_INIT
  61 # undef TEST_ENG_OPENSSL_RC4_P_CIPHER
  62 #endif
  63
  64 static int openssl_destroy(ENGINE *e);
  65
  66 #ifdef TEST_ENG_OPENSSL_RC4
  67 static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
  68                            const int **nids, int nid);
  69 #endif
  70 #ifdef TEST_ENG_OPENSSL_SHA
  71 static int openssl_digests(ENGINE *e, const EVP_MD **digest,
  72                            const int **nids, int nid);
  73 #endif
  74
  75 #ifdef TEST_ENG_OPENSSL_PKEY
  76 static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
  77                                       UI_METHOD *ui_method,
  78                                       void *callback_data);
  79 #endif
  80
  81 #ifdef TEST_ENG_OPENSSL_HMAC
  82 static int ossl_register_hmac_meth(void);
  83 static int ossl_pkey_meths(ENGINE *e, EVP_PKEY_METHOD **pmeth,
  84                            const int **nids, int nid);
  85 #endif
  86
  87 /* The constants used when creating the ENGINE */
  88 static const char *engine_openssl_id = "openssl";
  89 static const char *engine_openssl_name = "Software engine support";
  90
  91 /*
  92  * This internal function is used by ENGINE_openssl() and possibly by the
  93  * "dynamic" ENGINE support too
  94  */
  95 static int bind_helper(ENGINE *e)
  96 {
  97     if (!ENGINE_set_id(e, engine_openssl_id)
  98         || !ENGINE_set_name(e, engine_openssl_name)
  99         || !ENGINE_set_destroy_function(e, openssl_destroy)
 100 #ifndef TEST_ENG_OPENSSL_NO_ALGORITHMS
 101         || !ENGINE_set_RSA(e, RSA_get_default_method())
 102 # ifndef OPENSSL_NO_DSA
 103         || !ENGINE_set_DSA(e, DSA_get_default_method())
 104 # endif
 105 # ifndef OPENSSL_NO_EC
 106         || !ENGINE_set_EC(e, EC_KEY_OpenSSL())
 107 # endif
 108 # ifndef OPENSSL_NO_DH
 109         || !ENGINE_set_DH(e, DH_get_default_method())
 110 # endif
 111         || !ENGINE_set_RAND(e, RAND_OpenSSL())
 112 # ifdef TEST_ENG_OPENSSL_RC4
 113         || !ENGINE_set_ciphers(e, openssl_ciphers)
 114 # endif
 115 # ifdef TEST_ENG_OPENSSL_SHA
 116         || !ENGINE_set_digests(e, openssl_digests)
 117 # endif
 118 #endif
 119 #ifdef TEST_ENG_OPENSSL_PKEY
 120         || !ENGINE_set_load_privkey_function(e, openssl_load_privkey)
 121 #endif
 122 #ifdef TEST_ENG_OPENSSL_HMAC
 123         || !ossl_register_hmac_meth()
 124         || !ENGINE_set_pkey_meths(e, ossl_pkey_meths)
 125 #endif
 126         )
 127         return 0;
 128     /*
 129      * If we add errors to this ENGINE, ensure the error handling is setup
 130      * here
 131      */
 132     /* openssl_load_error_strings(); */
 133     return 1;
 134 }
 135
 136 static ENGINE *engine_openssl(void)
 137 {
 138     ENGINE *ret = ENGINE_new();
 139     if (ret == NULL)
 140         return NULL;
 141     if (!bind_helper(ret)) {
 142         ENGINE_free(ret);
 143         return NULL;
 144     }
 145     return ret;
 146 }
 147
 148 void engine_load_openssl_int(void)
 149 {
 150     ENGINE *toadd = engine_openssl();
 151     if (!toadd)
 152         return;
 153
 154     ERR_set_mark();
 155     ENGINE_add(toadd);
 156     /*
 157      * If the "add" worked, it gets a structural reference. So either way, we
 158      * release our just-created reference.
 159      */
 160     ENGINE_free(toadd);
 161     /*
 162      * If the "add" didn't work, it was probably a conflict because it was
 163      * already added (eg. someone calling ENGINE_load_blah then calling
 164      * ENGINE_load_builtin_engines() perhaps).
 165      */
 166     ERR_pop_to_mark();
 167 }
 168
 169 /*
 170  * This stuff is needed if this ENGINE is being compiled into a
 171  * self-contained shared-library.
 172  */
 173 #ifdef ENGINE_DYNAMIC_SUPPORT
 174 static int bind_fn(ENGINE *e, const char *id)
 175 {
 176     if (id && (strcmp(id, engine_openssl_id) != 0))
 177         return 0;
 178     if (!bind_helper(e))
 179         return 0;
 180     return 1;
 181 }
 182
 183 IMPLEMENT_DYNAMIC_CHECK_FN()
 184     IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
 185 #endif                          /* ENGINE_DYNAMIC_SUPPORT */
 186 #ifdef TEST_ENG_OPENSSL_RC4
 187 /*-
 188  * This section of code compiles an "alternative implementation" of two modes of
 189  * RC4 into this ENGINE. The result is that EVP_CIPHER operation for "rc4"
 190  * should under normal circumstances go via this support rather than the default
 191  * EVP support. There are other symbols to tweak the testing;
 192  *    TEST_ENC_OPENSSL_RC4_OTHERS - print a one line message to stderr each time
 193  *        we're asked for a cipher we don't support (should not happen).
 194  *    TEST_ENG_OPENSSL_RC4_P_INIT - print a one line message to stderr each time
 195  *        the "init_key" handler is called.
 196  *    TEST_ENG_OPENSSL_RC4_P_CIPHER - ditto for the "cipher" handler.
 197  */
 198 # include <openssl/rc4.h>
 199 # define TEST_RC4_KEY_SIZE               16
 200 typedef struct {
 201     unsigned char key[TEST_RC4_KEY_SIZE];
 202     RC4_KEY ks;
 203 } TEST_RC4_KEY;
 204 # define test(ctx) ((TEST_RC4_KEY *)EVP_CIPHER_CTX_get_cipher_data(ctx))
 205 static int test_rc4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 206                              const unsigned char *iv, int enc)
 207 {
 208     const int n = EVP_CIPHER_CTX_key_length(ctx);
 209
 210 # ifdef TEST_ENG_OPENSSL_RC4_P_INIT
 211     fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_init_key() called\n");
 212 # endif
 213     if (n <= 0)
 214         return n;
 215     memcpy(&test(ctx)->key[0], key, n);
 216     RC4_set_key(&test(ctx)->ks, n, test(ctx)->key);
 217     return 1;
 218 }
 219
 220 static int test_rc4_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
 221                            const unsigned char *in, size_t inl)
 222 {
 223 # ifdef TEST_ENG_OPENSSL_RC4_P_CIPHER
 224     fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) test_cipher() called\n");
 225 # endif
 226     RC4(&test(ctx)->ks, inl, in, out);
 227     return 1;
 228 }
 229
 230 static EVP_CIPHER *r4_cipher = NULL;
 231 static const EVP_CIPHER *test_r4_cipher(void)
 232 {
 233     if (r4_cipher == NULL) {
 234         EVP_CIPHER *cipher;
 235
 236         if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, TEST_RC4_KEY_SIZE)) == NULL
 237             || !EVP_CIPHER_meth_set_iv_length(cipher, 0)
 238             || !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
 239             || !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
 240             || !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
 241             || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
 242             EVP_CIPHER_meth_free(cipher);
 243             cipher = NULL;
 244         }
 245         r4_cipher = cipher;
 246     }
 247     return r4_cipher;
 248 }
 249 static void test_r4_cipher_destroy(void)
 250 {
 251     EVP_CIPHER_meth_free(r4_cipher);
 252     r4_cipher = NULL;
 253 }
 254
 255 static EVP_CIPHER *r4_40_cipher = NULL;
 256 static const EVP_CIPHER *test_r4_40_cipher(void)
 257 {
 258     if (r4_40_cipher == NULL) {
 259         EVP_CIPHER *cipher;
 260
 261         if ((cipher = EVP_CIPHER_meth_new(NID_rc4, 1, 5 /* 40 bits */)) == NULL
 262             || !EVP_CIPHER_meth_set_iv_length(cipher, 0)
 263             || !EVP_CIPHER_meth_set_flags(cipher, EVP_CIPH_VARIABLE_LENGTH)
 264             || !EVP_CIPHER_meth_set_init(cipher, test_rc4_init_key)
 265             || !EVP_CIPHER_meth_set_do_cipher(cipher, test_rc4_cipher)
 266             || !EVP_CIPHER_meth_set_impl_ctx_size(cipher, sizeof(TEST_RC4_KEY))) {
 267             EVP_CIPHER_meth_free(cipher);
 268             cipher = NULL;
 269         }
 270         r4_40_cipher = cipher;
 271     }
 272     return r4_40_cipher;
 273 }
 274 static void test_r4_40_cipher_destroy(void)
 275 {
 276     EVP_CIPHER_meth_free(r4_40_cipher);
 277     r4_40_cipher = NULL;
 278 }
 279 static int test_cipher_nids(const int **nids)
 280 {
 281     static int cipher_nids[4] = { 0, 0, 0, 0 };
 282     static int pos = 0;
 283     static int init = 0;
 284
 285     if (!init) {
 286         const EVP_CIPHER *cipher;
 287         if ((cipher = test_r4_cipher()) != NULL)
 288             cipher_nids[pos++] = EVP_CIPHER_nid(cipher);
 289         if ((cipher = test_r4_40_cipher()) != NULL)
 290             cipher_nids[pos++] = EVP_CIPHER_nid(cipher);
 291         cipher_nids[pos] = 0;
 292         init = 1;
 293     }
 294     *nids = cipher_nids;
 295     return pos;
 296 }
 297
 298 static int openssl_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
 299                            const int **nids, int nid)
 300 {
 301     if (!cipher) {
 302         /* We are returning a list of supported nids */
 303         return test_cipher_nids(nids);
 304     }
 305     /* We are being asked for a specific cipher */
 306     if (nid == NID_rc4)
 307         *cipher = test_r4_cipher();
 308     else if (nid == NID_rc4_40)
 309         *cipher = test_r4_40_cipher();
 310     else {
 311 # ifdef TEST_ENG_OPENSSL_RC4_OTHERS
 312         fprintf(stderr, "(TEST_ENG_OPENSSL_RC4) returning NULL for "
 313                 "nid %d\n", nid);
 314 # endif
 315         *cipher = NULL;
 316         return 0;
 317     }
 318     return 1;
 319 }
 320 #endif
 321
 322 #ifdef TEST_ENG_OPENSSL_SHA
 323 /* Much the same sort of comment as for TEST_ENG_OPENSSL_RC4 */
 324 # include <openssl/sha.h>
 325
 326 static int test_sha1_init(EVP_MD_CTX *ctx)
 327 {
 328 # ifdef TEST_ENG_OPENSSL_SHA_P_INIT
 329     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_init() called\n");
 330 # endif
 331     return SHA1_Init(EVP_MD_CTX_md_data(ctx));
 332 }
 333
 334 static int test_sha1_update(EVP_MD_CTX *ctx, const void *data, size_t count)
 335 {
 336 # ifdef TEST_ENG_OPENSSL_SHA_P_UPDATE
 337     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_update() called\n");
 338 # endif
 339     return SHA1_Update(EVP_MD_CTX_md_data(ctx), data, count);
 340 }
 341
 342 static int test_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
 343 {
 344 # ifdef TEST_ENG_OPENSSL_SHA_P_FINAL
 345     fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) test_sha1_final() called\n");
 346 # endif
 347     return SHA1_Final(md, EVP_MD_CTX_md_data(ctx));
 348 }
 349
 350 static EVP_MD *sha1_md = NULL;
 351 static const EVP_MD *test_sha_md(void)
 352 {
 353     if (sha1_md == NULL) {
 354         EVP_MD *md;
 355
 356         if ((md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption)) == NULL
 357             || !EVP_MD_meth_set_result_size(md, SHA_DIGEST_LENGTH)
 358             || !EVP_MD_meth_set_input_blocksize(md, SHA_CBLOCK)
 359             || !EVP_MD_meth_set_app_datasize(md,
 360                                              sizeof(EVP_MD *) + sizeof(SHA_CTX))
 361             || !EVP_MD_meth_set_flags(md, 0)
 362             || !EVP_MD_meth_set_init(md, test_sha1_init)
 363             || !EVP_MD_meth_set_update(md, test_sha1_update)
 364             || !EVP_MD_meth_set_final(md, test_sha1_final)) {
 365             EVP_MD_meth_free(md);
 366             md = NULL;
 367         }
 368         sha1_md = md;
 369     }
 370     return sha1_md;
 371 }
 372 static void test_sha_md_destroy(void)
 373 {
 374     EVP_MD_meth_free(sha1_md);
 375     sha1_md = NULL;
 376 }
 377 static int test_digest_nids(const int **nids)
 378 {
 379     static int digest_nids[2] = { 0, 0 };
 380     static int pos = 0;
 381     static int init = 0;
 382
 383     if (!init) {
 384         const EVP_MD *md;
 385         if ((md = test_sha_md()) != NULL)
 386             digest_nids[pos++] = EVP_MD_type(md);
 387         digest_nids[pos] = 0;
 388         init = 1;
 389     }
 390     *nids = digest_nids;
 391     return pos;
 392 }
 393
 394 static int openssl_digests(ENGINE *e, const EVP_MD **digest,
 395                            const int **nids, int nid)
 396 {
 397     if (!digest) {
 398         /* We are returning a list of supported nids */
 399         return test_digest_nids(nids);
 400     }
 401     /* We are being asked for a specific digest */
 402     if (nid == NID_sha1)
 403         *digest = test_sha_md();
 404     else {
 405 # ifdef TEST_ENG_OPENSSL_SHA_OTHERS
 406         fprintf(stderr, "(TEST_ENG_OPENSSL_SHA) returning NULL for "
 407                 "nid %d\n", nid);
 408 # endif
 409         *digest = NULL;
 410         return 0;
 411     }
 412     return 1;
 413 }
 414 #endif
 415
 416 #ifdef TEST_ENG_OPENSSL_PKEY
 417 static EVP_PKEY *openssl_load_privkey(ENGINE *eng, const char *key_id,
 418                                       UI_METHOD *ui_method,
 419                                       void *callback_data)
 420 {
 421     BIO *in;
 422     EVP_PKEY *key;
 423     fprintf(stderr, "(TEST_ENG_OPENSSL_PKEY)Loading Private key %s\n",
 424             key_id);
 425     in = BIO_new_file(key_id, "r");
 426     if (!in)
 427         return NULL;
 428     key = PEM_read_bio_PrivateKey(in, NULL, 0, NULL);
 429     BIO_free(in);
 430     return key;
 431 }
 432 #endif
 433
 434 #ifdef TEST_ENG_OPENSSL_HMAC
 435
 436 /*
 437  * Experimental HMAC redirection implementation: mainly copied from
 438  * hm_pmeth.c
 439  */
 440
 441 /* HMAC pkey context structure */
 442
 443 typedef struct {
 444     const EVP_MD *md;           /* MD for HMAC use */
 445     ASN1_OCTET_STRING ktmp;     /* Temp storage for key */
 446     HMAC_CTX *ctx;
 447 } OSSL_HMAC_PKEY_CTX;
 448
 449 static int ossl_hmac_init(EVP_PKEY_CTX *ctx)
 450 {
 451     OSSL_HMAC_PKEY_CTX *hctx;
 452
 453     if ((hctx = OPENSSL_zalloc(sizeof(*hctx))) == NULL) {
 454         ERR_raise(ERR_LIB_ENGINE, ERR_R_MALLOC_FAILURE);
 455         return 0;
 456     }
 457     hctx->ktmp.type = V_ASN1_OCTET_STRING;
 458     hctx->ctx = HMAC_CTX_new();
 459     if (hctx->ctx == NULL) {
 460         OPENSSL_free(hctx);
 461         return 0;
 462     }
 463     EVP_PKEY_CTX_set_data(ctx, hctx);
 464     EVP_PKEY_CTX_set0_keygen_info(ctx, NULL, 0);
 465 # ifdef TEST_ENG_OPENSSL_HMAC_INIT
 466     fprintf(stderr, "(TEST_ENG_OPENSSL_HMAC) ossl_hmac_init() called\n");
 467 # endif
 468     return 1;
 469 }
 470
 471 static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx);
 472
 473 static int ossl_hmac_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
 474 {
 475     OSSL_HMAC_PKEY_CTX *sctx, *dctx;
 476
 477     /* allocate memory for dst->data and a new HMAC_CTX in dst->data->ctx */
 478     if (!ossl_hmac_init(dst))
 479         return 0;
 480     sctx = EVP_PKEY_CTX_get_data(src);
 481     dctx = EVP_PKEY_CTX_get_data(dst);
 482     dctx->md = sctx->md;
 483     if (!HMAC_CTX_copy(dctx->ctx, sctx->ctx))
 484         goto err;
 485     if (sctx->ktmp.data) {
 486         if (!ASN1_OCTET_STRING_set(&dctx->ktmp,
 487                                    sctx->ktmp.data, sctx->ktmp.length))
 488             goto err;
 489     }
 490     return 1;
 491 err:
 492     /* release HMAC_CTX in dst->data->ctx and memory allocated for dst->data */
 493     ossl_hmac_cleanup(dst);
 494     return 0;
 495 }
 496
 497 static void ossl_hmac_cleanup(EVP_PKEY_CTX *ctx)
 498 {
 499     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
 500
 501     if (hctx) {
 502         HMAC_CTX_free(hctx->ctx);
 503         OPENSSL_clear_free(hctx->ktmp.data, hctx->ktmp.length);
 504         OPENSSL_free(hctx);
 505         EVP_PKEY_CTX_set_data(ctx, NULL);
 506     }
 507 }
 508
 509 static int ossl_hmac_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
 510 {
 511     ASN1_OCTET_STRING *hkey = NULL;
 512     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
 513     if (!hctx->ktmp.data)
 514         return 0;
 515     hkey = ASN1_OCTET_STRING_dup(&hctx->ktmp);
 516     if (!hkey)
 517         return 0;
 518     EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, hkey);
 519
 520     return 1;
 521 }
 522
 523 static int ossl_int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
 524 {
 525     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(EVP_MD_CTX_pkey_ctx(ctx));
 526     if (!HMAC_Update(hctx->ctx, data, count))
 527         return 0;
 528     return 1;
 529 }
 530
 531 static int ossl_hmac_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
 532 {
 533     EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
 534     EVP_MD_CTX_set_update_fn(mctx, ossl_int_update);
 535     return 1;
 536 }
 537
 538 static int ossl_hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig,
 539                              size_t *siglen, EVP_MD_CTX *mctx)
 540 {
 541     unsigned int hlen;
 542     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
 543     int l = EVP_MD_CTX_size(mctx);
 544
 545     if (l < 0)
 546         return 0;
 547     *siglen = l;
 548     if (!sig)
 549         return 1;
 550
 551     if (!HMAC_Final(hctx->ctx, sig, &hlen))
 552         return 0;
 553     *siglen = (size_t)hlen;
 554     return 1;
 555 }
 556
 557 static int ossl_hmac_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 558 {
 559     OSSL_HMAC_PKEY_CTX *hctx = EVP_PKEY_CTX_get_data(ctx);
 560     EVP_PKEY *pk;
 561     ASN1_OCTET_STRING *key;
 562     switch (type) {
 563
 564     case EVP_PKEY_CTRL_SET_MAC_KEY:
 565         if ((!p2 && p1 > 0) || (p1 < -1))
 566             return 0;
 567         if (!ASN1_OCTET_STRING_set(&hctx->ktmp, p2, p1))
 568             return 0;
 569         break;
 570
 571     case EVP_PKEY_CTRL_MD:
 572         hctx->md = p2;
 573         break;
 574
 575     case EVP_PKEY_CTRL_DIGESTINIT:
 576         pk = EVP_PKEY_CTX_get0_pkey(ctx);
 577         key = EVP_PKEY_get0(pk);
 578         if (!HMAC_Init_ex(hctx->ctx, key->data, key->length, hctx->md, NULL))
 579             return 0;
 580         break;
 581
 582     default:
 583         return -2;
 584
 585     }
 586     return 1;
 587 }
 588
 589 static int ossl_hmac_ctrl_str(EVP_PKEY_CTX *ctx,
 590                               const char *type, const char *value)
 591 {
 592     if (!value) {
 593         return 0;
 594     }
 595     if (strcmp(type, "key") == 0) {
 596         void *p = (void *)value;
 597         return ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, -1, p);
 598     }
 599     if (strcmp(type, "hexkey") == 0) {
 600         unsigned char *key;
 601         int r;
 602         long keylen;
 603         key = OPENSSL_hexstr2buf(value, &keylen);
 604         if (!key)
 605             return 0;
 606         r = ossl_hmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
 607         OPENSSL_free(key);
 608         return r;
 609     }
 610     return -2;
 611 }
 612
 613 static EVP_PKEY_METHOD *ossl_hmac_meth;
 614
 615 static int ossl_register_hmac_meth(void)
 616 {
 617     EVP_PKEY_METHOD *meth;
 618     meth = EVP_PKEY_meth_new(EVP_PKEY_HMAC, 0);
 619     if (meth == NULL)
 620         return 0;
 621     EVP_PKEY_meth_set_init(meth, ossl_hmac_init);
 622     EVP_PKEY_meth_set_copy(meth, ossl_hmac_copy);
 623     EVP_PKEY_meth_set_cleanup(meth, ossl_hmac_cleanup);
 624
 625     EVP_PKEY_meth_set_keygen(meth, 0, ossl_hmac_keygen);
 626
 627     EVP_PKEY_meth_set_signctx(meth, ossl_hmac_signctx_init,
 628                               ossl_hmac_signctx);
 629
 630     EVP_PKEY_meth_set_ctrl(meth, ossl_hmac_ctrl, ossl_hmac_ctrl_str);
 631     ossl_hmac_meth = meth;
 632     return 1;
 633 }
 634
 635 static int ossl_pkey_meths(ENGINE *e, EVP_PKEY_METHOD **pmeth,
 636                            const int **nids, int nid)
 637 {
 638     static int ossl_pkey_nids[] = {
 639         EVP_PKEY_HMAC,
 640         0
 641     };
 642
 643     if (pmeth == NULL) {
 644         *nids = ossl_pkey_nids;
 645         return 1;
 646     }
 647
 648     if (nid == EVP_PKEY_HMAC) {
 649         *pmeth = ossl_hmac_meth;
 650         return 1;
 651     }
 652
 653     *pmeth = NULL;
 654     return 0;
 655 }
 656
 657 #endif
 658
 659 int openssl_destroy(ENGINE *e)
 660 {
 661     test_sha_md_destroy();
 662 #ifdef TEST_ENG_OPENSSL_RC4
 663     test_r4_cipher_destroy();
 664     test_r4_40_cipher_destroy();
 665 #endif
 666     return 1;
 667 }
 668