crypto/evp/signature.c

   1 /*
   2  * Copyright 2006-2021 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/numbers.h"   /* includes SIZE_MAX */
  15 #include "internal/cryptlib.h"
  16 #include "internal/provider.h"
  17 #include "internal/core.h"
  18 #include "crypto/evp.h"
  19 #include "evp_local.h"
  20
  21 static EVP_SIGNATURE *evp_signature_new(OSSL_PROVIDER *prov)
  22 {
  23     EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE));
  24
  25     if (signature == NULL) {
  26         ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
  27         return NULL;
  28     }
  29
  30     signature->lock = CRYPTO_THREAD_lock_new();
  31     if (signature->lock == NULL) {
  32         ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
  33         OPENSSL_free(signature);
  34         return NULL;
  35     }
  36     signature->prov = prov;
  37     ossl_provider_up_ref(prov);
  38     signature->refcnt = 1;
  39
  40     return signature;
  41 }
  42
  43 static void *evp_signature_from_algorithm(int name_id,
  44                                           const OSSL_ALGORITHM *algodef,
  45                                           OSSL_PROVIDER *prov)
  46 {
  47     const OSSL_DISPATCH *fns = algodef->implementation;
  48     EVP_SIGNATURE *signature = NULL;
  49     int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
  50     int digsignfncnt = 0, digverifyfncnt = 0;
  51     int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0;
  52
  53     if ((signature = evp_signature_new(prov)) == NULL) {
  54         ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
  55         goto err;
  56     }
  57
  58     signature->name_id = name_id;
  59     if ((signature->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL)
  60         goto err;
  61     signature->description = algodef->algorithm_description;
  62
  63     for (; fns->function_id != 0; fns++) {
  64         switch (fns->function_id) {
  65         case OSSL_FUNC_SIGNATURE_NEWCTX:
  66             if (signature->newctx != NULL)
  67                 break;
  68             signature->newctx = OSSL_FUNC_signature_newctx(fns);
  69             ctxfncnt++;
  70             break;
  71         case OSSL_FUNC_SIGNATURE_SIGN_INIT:
  72             if (signature->sign_init != NULL)
  73                 break;
  74             signature->sign_init = OSSL_FUNC_signature_sign_init(fns);
  75             signfncnt++;
  76             break;
  77         case OSSL_FUNC_SIGNATURE_SIGN:
  78             if (signature->sign != NULL)
  79                 break;
  80             signature->sign = OSSL_FUNC_signature_sign(fns);
  81             signfncnt++;
  82             break;
  83         case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
  84             if (signature->verify_init != NULL)
  85                 break;
  86             signature->verify_init = OSSL_FUNC_signature_verify_init(fns);
  87             verifyfncnt++;
  88             break;
  89         case OSSL_FUNC_SIGNATURE_VERIFY:
  90             if (signature->verify != NULL)
  91                 break;
  92             signature->verify = OSSL_FUNC_signature_verify(fns);
  93             verifyfncnt++;
  94             break;
  95         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
  96             if (signature->verify_recover_init != NULL)
  97                 break;
  98             signature->verify_recover_init
  99                 = OSSL_FUNC_signature_verify_recover_init(fns);
 100             verifyrecfncnt++;
 101             break;
 102         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
 103             if (signature->verify_recover != NULL)
 104                 break;
 105             signature->verify_recover
 106                 = OSSL_FUNC_signature_verify_recover(fns);
 107             verifyrecfncnt++;
 108             break;
 109         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT:
 110             if (signature->digest_sign_init != NULL)
 111                 break;
 112             signature->digest_sign_init
 113                 = OSSL_FUNC_signature_digest_sign_init(fns);
 114             break;
 115         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
 116             if (signature->digest_sign_update != NULL)
 117                 break;
 118             signature->digest_sign_update
 119                 = OSSL_FUNC_signature_digest_sign_update(fns);
 120             digsignfncnt++;
 121             break;
 122         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
 123             if (signature->digest_sign_final != NULL)
 124                 break;
 125             signature->digest_sign_final
 126                 = OSSL_FUNC_signature_digest_sign_final(fns);
 127             digsignfncnt++;
 128             break;
 129         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN:
 130             if (signature->digest_sign != NULL)
 131                 break;
 132             signature->digest_sign
 133                 = OSSL_FUNC_signature_digest_sign(fns);
 134             break;
 135         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
 136             if (signature->digest_verify_init != NULL)
 137                 break;
 138             signature->digest_verify_init
 139                 = OSSL_FUNC_signature_digest_verify_init(fns);
 140             break;
 141         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
 142             if (signature->digest_verify_update != NULL)
 143                 break;
 144             signature->digest_verify_update
 145                 = OSSL_FUNC_signature_digest_verify_update(fns);
 146             digverifyfncnt++;
 147             break;
 148         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
 149             if (signature->digest_verify_final != NULL)
 150                 break;
 151             signature->digest_verify_final
 152                 = OSSL_FUNC_signature_digest_verify_final(fns);
 153             digverifyfncnt++;
 154             break;
 155         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY:
 156             if (signature->digest_verify != NULL)
 157                 break;
 158             signature->digest_verify
 159                 = OSSL_FUNC_signature_digest_verify(fns);
 160             break;
 161         case OSSL_FUNC_SIGNATURE_FREECTX:
 162             if (signature->freectx != NULL)
 163                 break;
 164             signature->freectx = OSSL_FUNC_signature_freectx(fns);
 165             ctxfncnt++;
 166             break;
 167         case OSSL_FUNC_SIGNATURE_DUPCTX:
 168             if (signature->dupctx != NULL)
 169                 break;
 170             signature->dupctx = OSSL_FUNC_signature_dupctx(fns);
 171             break;
 172         case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
 173             if (signature->get_ctx_params != NULL)
 174                 break;
 175             signature->get_ctx_params
 176                 = OSSL_FUNC_signature_get_ctx_params(fns);
 177             gparamfncnt++;
 178             break;
 179         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
 180             if (signature->gettable_ctx_params != NULL)
 181                 break;
 182             signature->gettable_ctx_params
 183                 = OSSL_FUNC_signature_gettable_ctx_params(fns);
 184             gparamfncnt++;
 185             break;
 186         case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
 187             if (signature->set_ctx_params != NULL)
 188                 break;
 189             signature->set_ctx_params
 190                 = OSSL_FUNC_signature_set_ctx_params(fns);
 191             sparamfncnt++;
 192             break;
 193         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
 194             if (signature->settable_ctx_params != NULL)
 195                 break;
 196             signature->settable_ctx_params
 197                 = OSSL_FUNC_signature_settable_ctx_params(fns);
 198             sparamfncnt++;
 199             break;
 200         case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
 201             if (signature->get_ctx_md_params != NULL)
 202                 break;
 203             signature->get_ctx_md_params
 204                 = OSSL_FUNC_signature_get_ctx_md_params(fns);
 205             gmdparamfncnt++;
 206             break;
 207         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
 208             if (signature->gettable_ctx_md_params != NULL)
 209                 break;
 210             signature->gettable_ctx_md_params
 211                 = OSSL_FUNC_signature_gettable_ctx_md_params(fns);
 212             gmdparamfncnt++;
 213             break;
 214         case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
 215             if (signature->set_ctx_md_params != NULL)
 216                 break;
 217             signature->set_ctx_md_params
 218                 = OSSL_FUNC_signature_set_ctx_md_params(fns);
 219             smdparamfncnt++;
 220             break;
 221         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
 222             if (signature->settable_ctx_md_params != NULL)
 223                 break;
 224             signature->settable_ctx_md_params
 225                 = OSSL_FUNC_signature_settable_ctx_md_params(fns);
 226             smdparamfncnt++;
 227             break;
 228         }
 229     }
 230     if (ctxfncnt != 2
 231         || (signfncnt == 0
 232             && verifyfncnt == 0
 233             && verifyrecfncnt == 0
 234             && digsignfncnt == 0
 235             && digverifyfncnt == 0
 236             && signature->digest_sign == NULL
 237             && signature->digest_verify == NULL)
 238         || (signfncnt != 0 && signfncnt != 2)
 239         || (verifyfncnt != 0 && verifyfncnt != 2)
 240         || (verifyrecfncnt != 0 && verifyrecfncnt != 2)
 241         || (digsignfncnt != 0 && digsignfncnt != 2)
 242         || (digsignfncnt == 2 && signature->digest_sign_init == NULL)
 243         || (digverifyfncnt != 0 && digverifyfncnt != 2)
 244         || (digverifyfncnt == 2 && signature->digest_verify_init == NULL)
 245         || (signature->digest_sign != NULL
 246             && signature->digest_sign_init == NULL)
 247         || (signature->digest_verify != NULL
 248             && signature->digest_verify_init == NULL)
 249         || (gparamfncnt != 0 && gparamfncnt != 2)
 250         || (sparamfncnt != 0 && sparamfncnt != 2)
 251         || (gmdparamfncnt != 0 && gmdparamfncnt != 2)
 252         || (smdparamfncnt != 0 && smdparamfncnt != 2)) {
 253         /*
 254          * In order to be a consistent set of functions we must have at least
 255          * a set of context functions (newctx and freectx) as well as a set of
 256          * "signature" functions:
 257          *  (sign_init, sign) or
 258          *  (verify_init verify) or
 259          *  (verify_recover_init, verify_recover) or
 260          *  (digest_sign_init, digest_sign_update, digest_sign_final) or
 261          *  (digest_verify_init, digest_verify_update, digest_verify_final) or
 262          *  (digest_sign_init, digest_sign) or
 263          *  (digest_verify_init, digest_verify).
 264          *
 265          * set_ctx_params and settable_ctx_params are optional, but if one of
 266          * them is present then the other one must also be present. The same
 267          * applies to get_ctx_params and gettable_ctx_params. The same rules
 268          * apply to the "md_params" functions. The dupctx function is optional.
 269          */
 270         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
 271         goto err;
 272     }
 273
 274     return signature;
 275  err:
 276     EVP_SIGNATURE_free(signature);
 277     return NULL;
 278 }
 279
 280 void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
 281 {
 282     int i;
 283
 284     if (signature == NULL)
 285         return;
 286     CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
 287     if (i > 0)
 288         return;
 289     OPENSSL_free(signature->type_name);
 290     ossl_provider_free(signature->prov);
 291     CRYPTO_THREAD_lock_free(signature->lock);
 292     OPENSSL_free(signature);
 293 }
 294
 295 int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
 296 {
 297     int ref = 0;
 298
 299     CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
 300     return 1;
 301 }
 302
 303 OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature)
 304 {
 305     return signature->prov;
 306 }
 307
 308 EVP_SIGNATURE *EVP_SIGNATURE_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
 309                                    const char *properties)
 310 {
 311     return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
 312                              evp_signature_from_algorithm,
 313                              (int (*)(void *))EVP_SIGNATURE_up_ref,
 314                              (void (*)(void *))EVP_SIGNATURE_free);
 315 }
 316
 317 int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name)
 318 {
 319     return evp_is_a(signature->prov, signature->name_id, NULL, name);
 320 }
 321
 322 int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature)
 323 {
 324     return signature->name_id;
 325 }
 326
 327 const char *EVP_SIGNATURE_name(const EVP_SIGNATURE *signature)
 328 {
 329     return signature->type_name;
 330 }
 331
 332 const char *EVP_SIGNATURE_description(const EVP_SIGNATURE *signature)
 333 {
 334     return signature->description;
 335 }
 336
 337 void EVP_SIGNATURE_do_all_provided(OSSL_LIB_CTX *libctx,
 338                                    void (*fn)(EVP_SIGNATURE *signature,
 339                                               void *arg),
 340                                    void *arg)
 341 {
 342     evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
 343                        (void (*)(void *, void *))fn, arg,
 344                        evp_signature_from_algorithm,
 345                        (void (*)(void *))EVP_SIGNATURE_free);
 346 }
 347
 348
 349 int EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
 350                                void (*fn)(const char *name, void *data),
 351                                void *data)
 352 {
 353     if (signature->prov != NULL)
 354         return evp_names_do_all(signature->prov, signature->name_id, fn, data);
 355
 356     return 1;
 357 }
 358
 359 const OSSL_PARAM *EVP_SIGNATURE_gettable_ctx_params(const EVP_SIGNATURE *sig)
 360 {
 361     void *provctx;
 362
 363     if (sig == NULL || sig->gettable_ctx_params == NULL)
 364         return NULL;
 365
 366     provctx = ossl_provider_ctx(EVP_SIGNATURE_provider(sig));
 367     return sig->gettable_ctx_params(NULL, provctx);
 368 }
 369
 370 const OSSL_PARAM *EVP_SIGNATURE_settable_ctx_params(const EVP_SIGNATURE *sig)
 371 {
 372     void *provctx;
 373
 374     if (sig == NULL || sig->settable_ctx_params == NULL)
 375         return NULL;
 376
 377     provctx = ossl_provider_ctx(EVP_SIGNATURE_provider(sig));
 378     return sig->settable_ctx_params(NULL, provctx);
 379 }
 380
 381 static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation,
 382                                    const OSSL_PARAM params[])
 383 {
 384     int ret = 0;
 385     void *provkey = NULL;
 386     EVP_SIGNATURE *signature = NULL;
 387     EVP_KEYMGMT *tmp_keymgmt = NULL;
 388     const char *supported_sig = NULL;
 389
 390     if (ctx == NULL) {
 391         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 392         return -2;
 393     }
 394
 395     evp_pkey_ctx_free_old_ops(ctx);
 396     ctx->operation = operation;
 397
 398     /*
 399      * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
 400      * calls can be removed.
 401      */
 402     ERR_set_mark();
 403
 404     if (evp_pkey_ctx_is_legacy(ctx))
 405         goto legacy;
 406
 407     /*
 408      * Ensure that the key is provided, either natively, or as a cached export.
 409      *  If not, go legacy
 410      */
 411     tmp_keymgmt = ctx->keymgmt;
 412     provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
 413                                           &tmp_keymgmt, ctx->propquery);
 414     if (tmp_keymgmt == NULL)
 415         goto legacy;
 416     if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
 417         ERR_clear_last_mark();
 418         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 419         goto err;
 420     }
 421     EVP_KEYMGMT_free(ctx->keymgmt);
 422     ctx->keymgmt = tmp_keymgmt;
 423
 424     if (ctx->keymgmt->query_operation_name != NULL)
 425         supported_sig = ctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
 426
 427     /*
 428      * If we didn't get a supported sig, assume there is one with the
 429      * same name as the key type.
 430      */
 431     if (supported_sig == NULL)
 432         supported_sig = ctx->keytype;
 433
 434     /*
 435      * Because we cleared out old ops, we shouldn't need to worry about
 436      * checking if signature is already there.
 437      */
 438     signature =
 439         EVP_SIGNATURE_fetch(ctx->libctx, supported_sig, ctx->propquery);
 440
 441     if (signature == NULL
 442         || (EVP_KEYMGMT_provider(ctx->keymgmt)
 443             != EVP_SIGNATURE_provider(signature))) {
 444         /*
 445          * We don't need to free ctx->keymgmt here, as it's not necessarily
 446          * tied to this operation.  It will be freed by EVP_PKEY_CTX_free().
 447          */
 448         EVP_SIGNATURE_free(signature);
 449         goto legacy;
 450     }
 451
 452     /*
 453      * TODO remove this when legacy is gone
 454      * If we don't have the full support we need with provided methods,
 455      * let's go see if legacy does.
 456      */
 457     ERR_pop_to_mark();
 458
 459     /* No more legacy from here down to legacy: */
 460
 461     ctx->op.sig.signature = signature;
 462     ctx->op.sig.algctx =
 463         signature->newctx(ossl_provider_ctx(signature->prov), ctx->propquery);
 464     if (ctx->op.sig.algctx == NULL) {
 465         /* The provider key can stay in the cache */
 466         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 467         goto err;
 468     }
 469
 470     switch (operation) {
 471     case EVP_PKEY_OP_SIGN:
 472         if (signature->sign_init == NULL) {
 473             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 474             ret = -2;
 475             goto err;
 476         }
 477         ret = signature->sign_init(ctx->op.sig.algctx, provkey, params);
 478         break;
 479     case EVP_PKEY_OP_VERIFY:
 480         if (signature->verify_init == NULL) {
 481             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 482             ret = -2;
 483             goto err;
 484         }
 485         ret = signature->verify_init(ctx->op.sig.algctx, provkey, params);
 486         break;
 487     case EVP_PKEY_OP_VERIFYRECOVER:
 488         if (signature->verify_recover_init == NULL) {
 489             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 490             ret = -2;
 491             goto err;
 492         }
 493         ret = signature->verify_recover_init(ctx->op.sig.algctx, provkey,
 494                                              params);
 495         break;
 496     default:
 497         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 498         goto err;
 499     }
 500
 501     if (ret <= 0) {
 502         signature->freectx(ctx->op.sig.algctx);
 503         ctx->op.sig.algctx = NULL;
 504         goto err;
 505     }
 506     goto end;
 507
 508  legacy:
 509     /*
 510      * TODO remove this when legacy is gone
 511      * If we don't have the full support we need with provided methods,
 512      * let's go see if legacy does.
 513      */
 514     ERR_pop_to_mark();
 515
 516     if (ctx->pmeth == NULL
 517             || (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
 518             || (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
 519             || (operation == EVP_PKEY_OP_VERIFYRECOVER
 520                 && ctx->pmeth->verify_recover == NULL)) {
 521         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 522         return -2;
 523     }
 524
 525     switch (operation) {
 526     case EVP_PKEY_OP_SIGN:
 527         if (ctx->pmeth->sign_init == NULL)
 528             return 1;
 529         ret = ctx->pmeth->sign_init(ctx);
 530         break;
 531     case EVP_PKEY_OP_VERIFY:
 532         if (ctx->pmeth->verify_init == NULL)
 533             return 1;
 534         ret = ctx->pmeth->verify_init(ctx);
 535         break;
 536     case EVP_PKEY_OP_VERIFYRECOVER:
 537         if (ctx->pmeth->verify_recover_init == NULL)
 538             return 1;
 539         ret = ctx->pmeth->verify_recover_init(ctx);
 540         break;
 541     default:
 542         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 543         goto err;
 544     }
 545     if (ret <= 0)
 546         goto err;
 547  end:
 548 #ifndef FIPS_MODULE
 549     if (ret > 0)
 550         ret = evp_pkey_ctx_use_cached_data(ctx);
 551 #endif
 552
 553     return ret;
 554  err:
 555     evp_pkey_ctx_free_old_ops(ctx);
 556     ctx->operation = EVP_PKEY_OP_UNDEFINED;
 557     return ret;
 558 }
 559
 560 int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
 561 {
 562     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN, NULL);
 563 }
 564
 565 int EVP_PKEY_sign_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
 566 {
 567     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN, params);
 568 }
 569
 570 int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
 571                   unsigned char *sig, size_t *siglen,
 572                   const unsigned char *tbs, size_t tbslen)
 573 {
 574     int ret;
 575
 576     if (ctx == NULL) {
 577         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 578         return -2;
 579     }
 580
 581     if (ctx->operation != EVP_PKEY_OP_SIGN) {
 582         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 583         return -1;
 584     }
 585
 586     if (ctx->op.sig.algctx == NULL)
 587         goto legacy;
 588
 589     ret = ctx->op.sig.signature->sign(ctx->op.sig.algctx, sig, siglen,
 590                                       SIZE_MAX, tbs, tbslen);
 591
 592     return ret;
 593  legacy:
 594
 595     if (ctx->pmeth == NULL || ctx->pmeth->sign == NULL) {
 596         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 597         return -2;
 598     }
 599
 600     M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
 601         return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
 602 }
 603
 604 int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
 605 {
 606     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY, NULL);
 607 }
 608
 609 int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
 610 {
 611     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY, params);
 612 }
 613
 614 int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
 615                     const unsigned char *sig, size_t siglen,
 616                     const unsigned char *tbs, size_t tbslen)
 617 {
 618     int ret;
 619
 620     if (ctx == NULL) {
 621         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 622         return -2;
 623     }
 624
 625     if (ctx->operation != EVP_PKEY_OP_VERIFY) {
 626         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 627         return -1;
 628     }
 629
 630     if (ctx->op.sig.algctx == NULL)
 631         goto legacy;
 632
 633     ret = ctx->op.sig.signature->verify(ctx->op.sig.algctx, sig, siglen,
 634                                         tbs, tbslen);
 635
 636     return ret;
 637  legacy:
 638     if (ctx->pmeth == NULL || ctx->pmeth->verify == NULL) {
 639         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 640         return -2;
 641     }
 642
 643     return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
 644 }
 645
 646 int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
 647 {
 648     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER, NULL);
 649 }
 650
 651 int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX *ctx,
 652                                     const OSSL_PARAM params[])
 653 {
 654     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER, params);
 655 }
 656
 657 int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
 658                             unsigned char *rout, size_t *routlen,
 659                             const unsigned char *sig, size_t siglen)
 660 {
 661     int ret;
 662
 663     if (ctx == NULL) {
 664         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 665         return -2;
 666     }
 667
 668     if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
 669         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 670         return -1;
 671     }
 672
 673     if (ctx->op.sig.algctx == NULL)
 674         goto legacy;
 675
 676     ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.algctx, rout,
 677                                                 routlen,
 678                                                 (rout == NULL ? 0 : *routlen),
 679                                                 sig, siglen);
 680     return ret;
 681  legacy:
 682     if (ctx->pmeth == NULL || ctx->pmeth->verify_recover == NULL) {
 683         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 684         return -2;
 685     }
 686     M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
 687         return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
 688 }