crypto/evp/pmeth_fn.c

   1 /*
   2  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <openssl/objects.h>
  13 #include <openssl/evp.h>
  14 #include "internal/cryptlib.h"
  15 #include "crypto/evp.h"
  16 #include "internal/provider.h"
  17 #include "evp_local.h"
  18
  19 static EVP_SIGNATURE *evp_signature_new(OSSL_PROVIDER *prov)
  20 {
  21     EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE));
  22
  23     signature->lock = CRYPTO_THREAD_lock_new();
  24     if (signature->lock == NULL) {
  25         OPENSSL_free(signature);
  26         return NULL;
  27     }
  28     signature->prov = prov;
  29     ossl_provider_up_ref(prov);
  30     signature->refcnt = 1;
  31
  32     return signature;
  33 }
  34
  35 static void *evp_signature_from_dispatch(int name_id,
  36                                          const OSSL_DISPATCH *fns,
  37                                          OSSL_PROVIDER *prov,
  38                                          void *vkeymgmt_data)
  39 {
  40     /*
  41      * Signature functions cannot work without a key, and key management
  42      * from the same provider to manage its keys.  We therefore fetch
  43      * a key management method using the same algorithm and properties
  44      * and pass that down to evp_generic_fetch to be passed on to our
  45      * evp_signature_from_dispatch, which will attach the key management
  46      * method to the newly created key exchange method as long as the
  47      * provider matches.
  48      */
  49     struct keymgmt_data_st *keymgmt_data = vkeymgmt_data;
  50     EVP_KEYMGMT *keymgmt =
  51         evp_keymgmt_fetch_by_number(keymgmt_data->ctx, name_id,
  52                                     keymgmt_data->properties);
  53     EVP_SIGNATURE *signature = NULL;
  54     int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
  55     int digsignfncnt = 0, digverifyfncnt = 0;
  56     int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0;
  57
  58     if (keymgmt == NULL || EVP_KEYMGMT_provider(keymgmt) != prov) {
  59         ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEYMGMT_AVAILABLE);
  60         goto err;
  61     }
  62
  63     if ((signature = evp_signature_new(prov)) == NULL) {
  64         ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
  65         goto err;
  66     }
  67
  68     signature->name_id = name_id;
  69     signature->keymgmt = keymgmt;
  70     keymgmt = NULL;              /* avoid double free on failure below */
  71
  72     for (; fns->function_id != 0; fns++) {
  73         switch (fns->function_id) {
  74         case OSSL_FUNC_SIGNATURE_NEWCTX:
  75             if (signature->newctx != NULL)
  76                 break;
  77             signature->newctx = OSSL_get_OP_signature_newctx(fns);
  78             ctxfncnt++;
  79             break;
  80         case OSSL_FUNC_SIGNATURE_SIGN_INIT:
  81             if (signature->sign_init != NULL)
  82                 break;
  83             signature->sign_init = OSSL_get_OP_signature_sign_init(fns);
  84             signfncnt++;
  85             break;
  86         case OSSL_FUNC_SIGNATURE_SIGN:
  87             if (signature->sign != NULL)
  88                 break;
  89             signature->sign = OSSL_get_OP_signature_sign(fns);
  90             signfncnt++;
  91             break;
  92         case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
  93             if (signature->verify_init != NULL)
  94                 break;
  95             signature->verify_init = OSSL_get_OP_signature_verify_init(fns);
  96             verifyfncnt++;
  97             break;
  98         case OSSL_FUNC_SIGNATURE_VERIFY:
  99             if (signature->verify != NULL)
 100                 break;
 101             signature->verify = OSSL_get_OP_signature_verify(fns);
 102             verifyfncnt++;
 103             break;
 104         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
 105             if (signature->verify_recover_init != NULL)
 106                 break;
 107             signature->verify_recover_init
 108                 = OSSL_get_OP_signature_verify_recover_init(fns);
 109             verifyrecfncnt++;
 110             break;
 111         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
 112             if (signature->verify_recover != NULL)
 113                 break;
 114             signature->verify_recover
 115                 = OSSL_get_OP_signature_verify_recover(fns);
 116             verifyrecfncnt++;
 117             break;
 118         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT:
 119             if (signature->digest_sign_init != NULL)
 120                 break;
 121             signature->digest_sign_init
 122                 = OSSL_get_OP_signature_digest_sign_init(fns);
 123             digsignfncnt++;
 124             break;
 125         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
 126             if (signature->digest_sign_update != NULL)
 127                 break;
 128             signature->digest_sign_update
 129                 = OSSL_get_OP_signature_digest_sign_update(fns);
 130             digsignfncnt++;
 131             break;
 132         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
 133             if (signature->digest_sign_final != NULL)
 134                 break;
 135             signature->digest_sign_final
 136                 = OSSL_get_OP_signature_digest_sign_final(fns);
 137             digsignfncnt++;
 138             break;
 139         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
 140             if (signature->digest_verify_init != NULL)
 141                 break;
 142             signature->digest_verify_init
 143                 = OSSL_get_OP_signature_digest_verify_init(fns);
 144             digverifyfncnt++;
 145             break;
 146         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
 147             if (signature->digest_verify_update != NULL)
 148                 break;
 149             signature->digest_verify_update
 150                 = OSSL_get_OP_signature_digest_verify_update(fns);
 151             digverifyfncnt++;
 152             break;
 153         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
 154             if (signature->digest_verify_final != NULL)
 155                 break;
 156             signature->digest_verify_final
 157                 = OSSL_get_OP_signature_digest_verify_final(fns);
 158             digverifyfncnt++;
 159             break;
 160         case OSSL_FUNC_SIGNATURE_FREECTX:
 161             if (signature->freectx != NULL)
 162                 break;
 163             signature->freectx = OSSL_get_OP_signature_freectx(fns);
 164             ctxfncnt++;
 165             break;
 166         case OSSL_FUNC_SIGNATURE_DUPCTX:
 167             if (signature->dupctx != NULL)
 168                 break;
 169             signature->dupctx = OSSL_get_OP_signature_dupctx(fns);
 170             break;
 171         case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
 172             if (signature->get_ctx_params != NULL)
 173                 break;
 174             signature->get_ctx_params
 175                 = OSSL_get_OP_signature_get_ctx_params(fns);
 176             gparamfncnt++;
 177             break;
 178         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
 179             if (signature->gettable_ctx_params != NULL)
 180                 break;
 181             signature->gettable_ctx_params
 182                 = OSSL_get_OP_signature_gettable_ctx_params(fns);
 183             gparamfncnt++;
 184             break;
 185         case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
 186             if (signature->set_ctx_params != NULL)
 187                 break;
 188             signature->set_ctx_params
 189                 = OSSL_get_OP_signature_set_ctx_params(fns);
 190             sparamfncnt++;
 191             break;
 192         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
 193             if (signature->settable_ctx_params != NULL)
 194                 break;
 195             signature->settable_ctx_params
 196                 = OSSL_get_OP_signature_settable_ctx_params(fns);
 197             sparamfncnt++;
 198             break;
 199         case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
 200             if (signature->get_ctx_md_params != NULL)
 201                 break;
 202             signature->get_ctx_md_params
 203                 = OSSL_get_OP_signature_get_ctx_md_params(fns);
 204             gmdparamfncnt++;
 205             break;
 206         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
 207             if (signature->gettable_ctx_md_params != NULL)
 208                 break;
 209             signature->gettable_ctx_md_params
 210                 = OSSL_get_OP_signature_gettable_ctx_md_params(fns);
 211             gmdparamfncnt++;
 212             break;
 213         case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
 214             if (signature->set_ctx_md_params != NULL)
 215                 break;
 216             signature->set_ctx_md_params
 217                 = OSSL_get_OP_signature_set_ctx_md_params(fns);
 218             smdparamfncnt++;
 219             break;
 220         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
 221             if (signature->settable_ctx_md_params != NULL)
 222                 break;
 223             signature->settable_ctx_md_params
 224                 = OSSL_get_OP_signature_settable_ctx_md_params(fns);
 225             smdparamfncnt++;
 226             break;
 227         }
 228     }
 229     if (ctxfncnt != 2
 230         || (signfncnt == 0
 231             && verifyfncnt == 0
 232             && verifyrecfncnt == 0
 233             && digsignfncnt == 0
 234             && digverifyfncnt == 0)
 235         || (signfncnt != 0 && signfncnt != 2)
 236         || (verifyfncnt != 0 && verifyfncnt != 2)
 237         || (verifyrecfncnt != 0 && verifyrecfncnt != 2)
 238         || (digsignfncnt != 0 && digsignfncnt != 3)
 239         || (digverifyfncnt != 0 && digverifyfncnt != 3)
 240         || (gparamfncnt != 0 && gparamfncnt != 2)
 241         || (sparamfncnt != 0 && sparamfncnt != 2)
 242         || (gmdparamfncnt != 0 && gmdparamfncnt != 2)
 243         || (smdparamfncnt != 0 && smdparamfncnt != 2)) {
 244         /*
 245          * In order to be a consistent set of functions we must have at least
 246          * a set of context functions (newctx and freectx) as well as a set of
 247          * "signature" functions:
 248          *  (sign_init, sign) or
 249          *  (verify_init verify) or
 250          *  (verify_recover_init, verify_recover) or
 251          *  (digest_sign_init, digest_sign_update, digest_sign_final) or
 252          *  (digest_verify_init, digest_verify_update, digest_verify_final).
 253          *
 254          * set_ctx_params and settable_ctx_params are optional, but if one of
 255          * them is present then the other one must also be present. The same
 256          * applies to get_ctx_params and gettable_ctx_params. The same rules
 257          * apply to the "md_params" functions. The dupctx function is optional.
 258          */
 259         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
 260         goto err;
 261     }
 262
 263     return signature;
 264  err:
 265     EVP_SIGNATURE_free(signature);
 266     EVP_KEYMGMT_free(keymgmt);
 267     return NULL;
 268 }
 269
 270 void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
 271 {
 272     if (signature != NULL) {
 273         int i;
 274
 275         CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
 276         if (i > 0)
 277             return;
 278         EVP_KEYMGMT_free(signature->keymgmt);
 279         ossl_provider_free(signature->prov);
 280         CRYPTO_THREAD_lock_free(signature->lock);
 281         OPENSSL_free(signature);
 282     }
 283 }
 284
 285 int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
 286 {
 287     int ref = 0;
 288
 289     CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
 290     return 1;
 291 }
 292
 293 OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature)
 294 {
 295     return signature->prov;
 296 }
 297
 298 EVP_SIGNATURE *EVP_SIGNATURE_fetch(OPENSSL_CTX *ctx, const char *algorithm,
 299                                    const char *properties)
 300 {
 301     struct keymgmt_data_st keymgmt_data;
 302
 303     /*
 304      * A signature operation cannot work without a key, so we need key
 305      * management from the same provider to manage its keys.
 306      */
 307     keymgmt_data.ctx = ctx;
 308     keymgmt_data.properties = properties;
 309     return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
 310                              evp_signature_from_dispatch, &keymgmt_data,
 311                              (int (*)(void *))EVP_SIGNATURE_up_ref,
 312                              (void (*)(void *))EVP_SIGNATURE_free);
 313 }
 314
 315 int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name)
 316 {
 317     return evp_is_a(signature->prov, signature->name_id, name);
 318 }
 319
 320 int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature)
 321 {
 322     return signature->name_id;
 323 }
 324
 325 void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx,
 326                                    void (*fn)(EVP_SIGNATURE *signature,
 327                                               void *arg),
 328                                    void *arg)
 329 {
 330     struct keymgmt_data_st keymgmt_data;
 331
 332     keymgmt_data.ctx = libctx;
 333     keymgmt_data.properties = NULL;
 334     evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
 335                        (void (*)(void *, void *))fn, arg,
 336                        evp_signature_from_dispatch, &keymgmt_data,
 337                        (void (*)(void *))EVP_SIGNATURE_free);
 338 }
 339
 340
 341 void EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
 342                                 void (*fn)(const char *name, void *data),
 343                                 void *data)
 344 {
 345     if (signature->prov != NULL)
 346         evp_names_do_all(signature->prov, signature->name_id, fn, data);
 347 }
 348
 349 static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature,
 350                                    int operation)
 351 {
 352     int ret = 0;
 353     void *provkey = NULL;
 354
 355     if (ctx == NULL) {
 356         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 357         return -2;
 358     }
 359
 360     evp_pkey_ctx_free_old_ops(ctx);
 361     ctx->operation = operation;
 362
 363     if (ctx->engine != NULL)
 364         goto legacy;
 365
 366     if (signature != NULL) {
 367         if (!EVP_SIGNATURE_up_ref(signature))
 368             goto err;
 369     } else {
 370         int nid = ctx->pkey != NULL ? ctx->pkey->type : ctx->pmeth->pkey_id;
 371
 372         /*
 373          * TODO(3.0): Check for legacy handling. Remove this once all all
 374          * algorithms are moved to providers.
 375          */
 376         if (ctx->pkey != NULL) {
 377             switch (ctx->pkey->type) {
 378             case NID_dsa:
 379                 break;
 380             default:
 381                 goto legacy;
 382             }
 383             signature = EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(nid), NULL);
 384         } else {
 385             goto legacy;
 386         }
 387
 388         if (signature == NULL) {
 389             EVPerr(0, EVP_R_INITIALIZATION_ERROR);
 390             goto err;
 391         }
 392     }
 393
 394     ctx->op.sig.signature = signature;
 395     if (ctx->pkey != NULL) {
 396         provkey =
 397             evp_keymgmt_export_to_provider(ctx->pkey, signature->keymgmt, 0);
 398         if (provkey == NULL) {
 399             EVPerr(0, EVP_R_INITIALIZATION_ERROR);
 400             goto err;
 401         }
 402     }
 403     ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov));
 404     if (ctx->op.sig.sigprovctx == NULL) {
 405         /* The provider key can stay in the cache */
 406         EVPerr(0, EVP_R_INITIALIZATION_ERROR);
 407         goto err;
 408     }
 409
 410     switch (operation) {
 411     case EVP_PKEY_OP_SIGN:
 412         if (signature->sign_init == NULL) {
 413             EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 414             ret = -2;
 415             goto err;
 416         }
 417         ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey);
 418         break;
 419     case EVP_PKEY_OP_VERIFY:
 420         if (signature->verify_init == NULL) {
 421             EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 422             ret = -2;
 423             goto err;
 424         }
 425         ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey);
 426         break;
 427     case EVP_PKEY_OP_VERIFYRECOVER:
 428         if (signature->verify_recover_init == NULL) {
 429             EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 430             ret = -2;
 431             goto err;
 432         }
 433         ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey);
 434         break;
 435     default:
 436         EVPerr(0, EVP_R_INITIALIZATION_ERROR);
 437         goto err;
 438     }
 439
 440     if (ret <= 0) {
 441         signature->freectx(ctx->op.sig.sigprovctx);
 442         ctx->op.sig.sigprovctx = NULL;
 443         goto err;
 444     }
 445     return 1;
 446
 447  legacy:
 448     if (ctx->pmeth == NULL
 449             || (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
 450             || (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
 451             || (operation == EVP_PKEY_OP_VERIFYRECOVER
 452                 && ctx->pmeth->verify_recover == NULL)) {
 453         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 454         return -2;
 455     }
 456
 457     switch (operation) {
 458     case EVP_PKEY_OP_SIGN:
 459         if (ctx->pmeth->sign_init == NULL)
 460             return 1;
 461         ret = ctx->pmeth->sign_init(ctx);
 462         break;
 463     case EVP_PKEY_OP_VERIFY:
 464         if (ctx->pmeth->verify_init == NULL)
 465             return 1;
 466         ret = ctx->pmeth->verify_init(ctx);
 467         break;
 468     case EVP_PKEY_OP_VERIFYRECOVER:
 469         if (ctx->pmeth->verify_recover_init == NULL)
 470             return 1;
 471         ret = ctx->pmeth->verify_recover_init(ctx);
 472         break;
 473     default:
 474         EVPerr(0, EVP_R_INITIALIZATION_ERROR);
 475         goto err;
 476     }
 477     if (ret <= 0)
 478         goto err;
 479     return ret;
 480
 481  err:
 482     ctx->operation = EVP_PKEY_OP_UNDEFINED;
 483     return ret;
 484 }
 485
 486 int EVP_PKEY_sign_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
 487 {
 488     return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_SIGN);
 489 }
 490
 491 int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
 492 {
 493     return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_SIGN);
 494 }
 495
 496 int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
 497                   unsigned char *sig, size_t *siglen,
 498                   const unsigned char *tbs, size_t tbslen)
 499 {
 500     int ret;
 501
 502     if (ctx == NULL) {
 503         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 504         return -2;
 505     }
 506
 507     if (ctx->operation != EVP_PKEY_OP_SIGN) {
 508         EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
 509         return -1;
 510     }
 511
 512     if (ctx->op.sig.sigprovctx == NULL)
 513         goto legacy;
 514
 515     ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen,
 516                                       SIZE_MAX, tbs, tbslen);
 517
 518     return ret;
 519  legacy:
 520
 521     if (ctx->pmeth == NULL || ctx->pmeth->sign == NULL) {
 522         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 523         return -2;
 524     }
 525
 526     M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
 527         return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
 528 }
 529
 530 int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
 531 {
 532     return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFY);
 533 }
 534
 535 int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
 536 {
 537     return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_VERIFY);
 538 }
 539
 540 int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
 541                     const unsigned char *sig, size_t siglen,
 542                     const unsigned char *tbs, size_t tbslen)
 543 {
 544     int ret;
 545
 546     if (ctx == NULL) {
 547         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 548         return -2;
 549     }
 550
 551     if (ctx->operation != EVP_PKEY_OP_VERIFY) {
 552         EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
 553         return -1;
 554     }
 555
 556     if (ctx->op.sig.sigprovctx == NULL)
 557         goto legacy;
 558
 559     ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen,
 560                                         tbs, tbslen);
 561
 562     return ret;
 563  legacy:
 564     if (ctx->pmeth == NULL || ctx->pmeth->verify == NULL) {
 565         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 566         return -2;
 567     }
 568
 569     return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
 570 }
 571
 572 int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
 573 {
 574     return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFYRECOVER);
 575 }
 576
 577 int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
 578 {
 579     return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_VERIFYRECOVER);
 580 }
 581
 582 int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
 583                             unsigned char *rout, size_t *routlen,
 584                             const unsigned char *sig, size_t siglen)
 585 {
 586     int ret;
 587
 588     if (ctx == NULL) {
 589         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 590         return -2;
 591     }
 592
 593     if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
 594         EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
 595         return -1;
 596     }
 597
 598     if (ctx->op.sig.sigprovctx == NULL)
 599         goto legacy;
 600
 601     ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout,
 602                                                 routlen,
 603                                                 (rout == NULL ? 0 : *routlen),
 604                                                 sig, siglen);
 605     return ret;
 606  legacy:
 607     if (ctx->pmeth == NULL || ctx->pmeth->verify_recover == NULL) {
 608         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 609         return -2;
 610     }
 611     M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
 612         return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
 613 }
 614
 615 int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
 616 {
 617     int ret;
 618     if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
 619         EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
 620                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 621         return -2;
 622     }
 623     ctx->operation = EVP_PKEY_OP_ENCRYPT;
 624     if (!ctx->pmeth->encrypt_init)
 625         return 1;
 626     ret = ctx->pmeth->encrypt_init(ctx);
 627     if (ret <= 0)
 628         ctx->operation = EVP_PKEY_OP_UNDEFINED;
 629     return ret;
 630 }
 631
 632 int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
 633                      unsigned char *out, size_t *outlen,
 634                      const unsigned char *in, size_t inlen)
 635 {
 636     if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
 637         EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
 638                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 639         return -2;
 640     }
 641     if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
 642         EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
 643         return -1;
 644     }
 645     M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
 646         return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
 647 }
 648
 649 int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
 650 {
 651     int ret;
 652     if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
 653         EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
 654                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 655         return -2;
 656     }
 657     ctx->operation = EVP_PKEY_OP_DECRYPT;
 658     if (!ctx->pmeth->decrypt_init)
 659         return 1;
 660     ret = ctx->pmeth->decrypt_init(ctx);
 661     if (ret <= 0)
 662         ctx->operation = EVP_PKEY_OP_UNDEFINED;
 663     return ret;
 664 }
 665
 666 int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
 667                      unsigned char *out, size_t *outlen,
 668                      const unsigned char *in, size_t inlen)
 669 {
 670     if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
 671         EVPerr(EVP_F_EVP_PKEY_DECRYPT,
 672                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 673         return -2;
 674     }
 675     if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
 676         EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
 677         return -1;
 678     }
 679     M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
 680         return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
 681 }