crypto/evp/signature.c

   1 /*
   2  * Copyright 2006-2024 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         return NULL;
  27
  28     if (!CRYPTO_NEW_REF(&signature->refcnt, 1)) {
  29         OPENSSL_free(signature);
  30         return NULL;
  31     }
  32
  33     signature->prov = prov;
  34     ossl_provider_up_ref(prov);
  35
  36     return signature;
  37 }
  38
  39 static void *evp_signature_from_algorithm(int name_id,
  40                                           const OSSL_ALGORITHM *algodef,
  41                                           OSSL_PROVIDER *prov)
  42 {
  43     const OSSL_DISPATCH *fns = algodef->implementation;
  44     EVP_SIGNATURE *signature = NULL;
  45     int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
  46     int digsignfncnt = 0, digverifyfncnt = 0;
  47     int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0;
  48
  49     if ((signature = evp_signature_new(prov)) == NULL) {
  50         ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
  51         goto err;
  52     }
  53
  54     signature->name_id = name_id;
  55     if ((signature->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL)
  56         goto err;
  57     signature->description = algodef->algorithm_description;
  58
  59     for (; fns->function_id != 0; fns++) {
  60         switch (fns->function_id) {
  61         case OSSL_FUNC_SIGNATURE_NEWCTX:
  62             if (signature->newctx != NULL)
  63                 break;
  64             signature->newctx = OSSL_FUNC_signature_newctx(fns);
  65             ctxfncnt++;
  66             break;
  67         case OSSL_FUNC_SIGNATURE_SIGN_INIT:
  68             if (signature->sign_init != NULL)
  69                 break;
  70             signature->sign_init = OSSL_FUNC_signature_sign_init(fns);
  71             signfncnt++;
  72             break;
  73         case OSSL_FUNC_SIGNATURE_SIGN:
  74             if (signature->sign != NULL)
  75                 break;
  76             signature->sign = OSSL_FUNC_signature_sign(fns);
  77             signfncnt++;
  78             break;
  79         case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
  80             if (signature->verify_init != NULL)
  81                 break;
  82             signature->verify_init = OSSL_FUNC_signature_verify_init(fns);
  83             verifyfncnt++;
  84             break;
  85         case OSSL_FUNC_SIGNATURE_VERIFY:
  86             if (signature->verify != NULL)
  87                 break;
  88             signature->verify = OSSL_FUNC_signature_verify(fns);
  89             verifyfncnt++;
  90             break;
  91         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
  92             if (signature->verify_recover_init != NULL)
  93                 break;
  94             signature->verify_recover_init
  95                 = OSSL_FUNC_signature_verify_recover_init(fns);
  96             verifyrecfncnt++;
  97             break;
  98         case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
  99             if (signature->verify_recover != NULL)
 100                 break;
 101             signature->verify_recover
 102                 = OSSL_FUNC_signature_verify_recover(fns);
 103             verifyrecfncnt++;
 104             break;
 105         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT:
 106             if (signature->digest_sign_init != NULL)
 107                 break;
 108             signature->digest_sign_init
 109                 = OSSL_FUNC_signature_digest_sign_init(fns);
 110             break;
 111         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
 112             if (signature->digest_sign_update != NULL)
 113                 break;
 114             signature->digest_sign_update
 115                 = OSSL_FUNC_signature_digest_sign_update(fns);
 116             digsignfncnt++;
 117             break;
 118         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
 119             if (signature->digest_sign_final != NULL)
 120                 break;
 121             signature->digest_sign_final
 122                 = OSSL_FUNC_signature_digest_sign_final(fns);
 123             digsignfncnt++;
 124             break;
 125         case OSSL_FUNC_SIGNATURE_DIGEST_SIGN:
 126             if (signature->digest_sign != NULL)
 127                 break;
 128             signature->digest_sign
 129                 = OSSL_FUNC_signature_digest_sign(fns);
 130             break;
 131         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
 132             if (signature->digest_verify_init != NULL)
 133                 break;
 134             signature->digest_verify_init
 135                 = OSSL_FUNC_signature_digest_verify_init(fns);
 136             break;
 137         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
 138             if (signature->digest_verify_update != NULL)
 139                 break;
 140             signature->digest_verify_update
 141                 = OSSL_FUNC_signature_digest_verify_update(fns);
 142             digverifyfncnt++;
 143             break;
 144         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
 145             if (signature->digest_verify_final != NULL)
 146                 break;
 147             signature->digest_verify_final
 148                 = OSSL_FUNC_signature_digest_verify_final(fns);
 149             digverifyfncnt++;
 150             break;
 151         case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY:
 152             if (signature->digest_verify != NULL)
 153                 break;
 154             signature->digest_verify
 155                 = OSSL_FUNC_signature_digest_verify(fns);
 156             break;
 157         case OSSL_FUNC_SIGNATURE_FREECTX:
 158             if (signature->freectx != NULL)
 159                 break;
 160             signature->freectx = OSSL_FUNC_signature_freectx(fns);
 161             ctxfncnt++;
 162             break;
 163         case OSSL_FUNC_SIGNATURE_DUPCTX:
 164             if (signature->dupctx != NULL)
 165                 break;
 166             signature->dupctx = OSSL_FUNC_signature_dupctx(fns);
 167             break;
 168         case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
 169             if (signature->get_ctx_params != NULL)
 170                 break;
 171             signature->get_ctx_params
 172                 = OSSL_FUNC_signature_get_ctx_params(fns);
 173             gparamfncnt++;
 174             break;
 175         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
 176             if (signature->gettable_ctx_params != NULL)
 177                 break;
 178             signature->gettable_ctx_params
 179                 = OSSL_FUNC_signature_gettable_ctx_params(fns);
 180             gparamfncnt++;
 181             break;
 182         case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
 183             if (signature->set_ctx_params != NULL)
 184                 break;
 185             signature->set_ctx_params
 186                 = OSSL_FUNC_signature_set_ctx_params(fns);
 187             sparamfncnt++;
 188             break;
 189         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
 190             if (signature->settable_ctx_params != NULL)
 191                 break;
 192             signature->settable_ctx_params
 193                 = OSSL_FUNC_signature_settable_ctx_params(fns);
 194             sparamfncnt++;
 195             break;
 196         case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
 197             if (signature->get_ctx_md_params != NULL)
 198                 break;
 199             signature->get_ctx_md_params
 200                 = OSSL_FUNC_signature_get_ctx_md_params(fns);
 201             gmdparamfncnt++;
 202             break;
 203         case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
 204             if (signature->gettable_ctx_md_params != NULL)
 205                 break;
 206             signature->gettable_ctx_md_params
 207                 = OSSL_FUNC_signature_gettable_ctx_md_params(fns);
 208             gmdparamfncnt++;
 209             break;
 210         case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
 211             if (signature->set_ctx_md_params != NULL)
 212                 break;
 213             signature->set_ctx_md_params
 214                 = OSSL_FUNC_signature_set_ctx_md_params(fns);
 215             smdparamfncnt++;
 216             break;
 217         case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
 218             if (signature->settable_ctx_md_params != NULL)
 219                 break;
 220             signature->settable_ctx_md_params
 221                 = OSSL_FUNC_signature_settable_ctx_md_params(fns);
 222             smdparamfncnt++;
 223             break;
 224         }
 225     }
 226     if (ctxfncnt != 2
 227         || (signfncnt == 0
 228             && verifyfncnt == 0
 229             && verifyrecfncnt == 0
 230             && digsignfncnt == 0
 231             && digverifyfncnt == 0
 232             && signature->digest_sign == NULL
 233             && signature->digest_verify == NULL)
 234         || (signfncnt != 0 && signfncnt != 2)
 235         || (verifyfncnt != 0 && verifyfncnt != 2)
 236         || (verifyrecfncnt != 0 && verifyrecfncnt != 2)
 237         || (digsignfncnt != 0 && digsignfncnt != 2)
 238         || (digsignfncnt == 2 && signature->digest_sign_init == NULL)
 239         || (digverifyfncnt != 0 && digverifyfncnt != 2)
 240         || (digverifyfncnt == 2 && signature->digest_verify_init == NULL)
 241         || (signature->digest_sign != NULL
 242             && signature->digest_sign_init == NULL)
 243         || (signature->digest_verify != NULL
 244             && signature->digest_verify_init == NULL)
 245         || (gparamfncnt != 0 && gparamfncnt != 2)
 246         || (sparamfncnt != 0 && sparamfncnt != 2)
 247         || (gmdparamfncnt != 0 && gmdparamfncnt != 2)
 248         || (smdparamfncnt != 0 && smdparamfncnt != 2)) {
 249         /*
 250          * In order to be a consistent set of functions we must have at least
 251          * a set of context functions (newctx and freectx) as well as a set of
 252          * "signature" functions:
 253          *  (sign_init, sign) or
 254          *  (verify_init verify) or
 255          *  (verify_recover_init, verify_recover) or
 256          *  (digest_sign_init, digest_sign_update, digest_sign_final) or
 257          *  (digest_verify_init, digest_verify_update, digest_verify_final) or
 258          *  (digest_sign_init, digest_sign) or
 259          *  (digest_verify_init, digest_verify).
 260          *
 261          * set_ctx_params and settable_ctx_params are optional, but if one of
 262          * them is present then the other one must also be present. The same
 263          * applies to get_ctx_params and gettable_ctx_params. The same rules
 264          * apply to the "md_params" functions. The dupctx function is optional.
 265          */
 266         ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
 267         goto err;
 268     }
 269
 270     return signature;
 271  err:
 272     EVP_SIGNATURE_free(signature);
 273     return NULL;
 274 }
 275
 276 void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
 277 {
 278     int i;
 279
 280     if (signature == NULL)
 281         return;
 282     CRYPTO_DOWN_REF(&signature->refcnt, &i);
 283     if (i > 0)
 284         return;
 285     OPENSSL_free(signature->type_name);
 286     ossl_provider_free(signature->prov);
 287     CRYPTO_FREE_REF(&signature->refcnt);
 288     OPENSSL_free(signature);
 289 }
 290
 291 int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
 292 {
 293     int ref = 0;
 294
 295     CRYPTO_UP_REF(&signature->refcnt, &ref);
 296     return 1;
 297 }
 298
 299 OSSL_PROVIDER *EVP_SIGNATURE_get0_provider(const EVP_SIGNATURE *signature)
 300 {
 301     return signature->prov;
 302 }
 303
 304 EVP_SIGNATURE *EVP_SIGNATURE_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
 305                                    const char *properties)
 306 {
 307     return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
 308                              evp_signature_from_algorithm,
 309                              (int (*)(void *))EVP_SIGNATURE_up_ref,
 310                              (void (*)(void *))EVP_SIGNATURE_free);
 311 }
 312
 313 EVP_SIGNATURE *evp_signature_fetch_from_prov(OSSL_PROVIDER *prov,
 314                                              const char *algorithm,
 315                                              const char *properties)
 316 {
 317     return evp_generic_fetch_from_prov(prov, OSSL_OP_SIGNATURE,
 318                                        algorithm, properties,
 319                                        evp_signature_from_algorithm,
 320                                        (int (*)(void *))EVP_SIGNATURE_up_ref,
 321                                        (void (*)(void *))EVP_SIGNATURE_free);
 322 }
 323
 324 int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name)
 325 {
 326     return signature != NULL
 327            && evp_is_a(signature->prov, signature->name_id, NULL, name);
 328 }
 329
 330 int evp_signature_get_number(const EVP_SIGNATURE *signature)
 331 {
 332     return signature->name_id;
 333 }
 334
 335 const char *EVP_SIGNATURE_get0_name(const EVP_SIGNATURE *signature)
 336 {
 337     return signature->type_name;
 338 }
 339
 340 const char *EVP_SIGNATURE_get0_description(const EVP_SIGNATURE *signature)
 341 {
 342     return signature->description;
 343 }
 344
 345 void EVP_SIGNATURE_do_all_provided(OSSL_LIB_CTX *libctx,
 346                                    void (*fn)(EVP_SIGNATURE *signature,
 347                                               void *arg),
 348                                    void *arg)
 349 {
 350     evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
 351                        (void (*)(void *, void *))fn, arg,
 352                        evp_signature_from_algorithm,
 353                        (int (*)(void *))EVP_SIGNATURE_up_ref,
 354                        (void (*)(void *))EVP_SIGNATURE_free);
 355 }
 356
 357
 358 int EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
 359                                void (*fn)(const char *name, void *data),
 360                                void *data)
 361 {
 362     if (signature->prov != NULL)
 363         return evp_names_do_all(signature->prov, signature->name_id, fn, data);
 364
 365     return 1;
 366 }
 367
 368 const OSSL_PARAM *EVP_SIGNATURE_gettable_ctx_params(const EVP_SIGNATURE *sig)
 369 {
 370     void *provctx;
 371
 372     if (sig == NULL || sig->gettable_ctx_params == NULL)
 373         return NULL;
 374
 375     provctx = ossl_provider_ctx(EVP_SIGNATURE_get0_provider(sig));
 376     return sig->gettable_ctx_params(NULL, provctx);
 377 }
 378
 379 const OSSL_PARAM *EVP_SIGNATURE_settable_ctx_params(const EVP_SIGNATURE *sig)
 380 {
 381     void *provctx;
 382
 383     if (sig == NULL || sig->settable_ctx_params == NULL)
 384         return NULL;
 385
 386     provctx = ossl_provider_ctx(EVP_SIGNATURE_get0_provider(sig));
 387     return sig->settable_ctx_params(NULL, provctx);
 388 }
 389
 390 static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation,
 391                                    const OSSL_PARAM params[])
 392 {
 393     int ret = 0;
 394     void *provkey = NULL;
 395     EVP_SIGNATURE *signature = NULL;
 396     EVP_KEYMGMT *tmp_keymgmt = NULL;
 397     const OSSL_PROVIDER *tmp_prov = NULL;
 398     const char *supported_sig = NULL;
 399     int iter;
 400
 401     if (ctx == NULL) {
 402         ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
 403         return -1;
 404     }
 405
 406     evp_pkey_ctx_free_old_ops(ctx);
 407     ctx->operation = operation;
 408
 409     ERR_set_mark();
 410
 411     if (evp_pkey_ctx_is_legacy(ctx))
 412         goto legacy;
 413
 414     if (ctx->pkey == NULL) {
 415         ERR_clear_last_mark();
 416         ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET);
 417         goto err;
 418     }
 419
 420     /*
 421      * Try to derive the supported signature from |ctx->keymgmt|.
 422      */
 423     if (!ossl_assert(ctx->pkey->keymgmt == NULL
 424                      || ctx->pkey->keymgmt == ctx->keymgmt)) {
 425         ERR_clear_last_mark();
 426         ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
 427         goto err;
 428     }
 429     supported_sig = evp_keymgmt_util_query_operation_name(ctx->keymgmt,
 430                                                           OSSL_OP_SIGNATURE);
 431     if (supported_sig == NULL) {
 432         ERR_clear_last_mark();
 433         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 434         goto err;
 435     }
 436
 437     /*
 438      * We perform two iterations:
 439      *
 440      * 1.  Do the normal signature fetch, using the fetching data given by
 441      *     the EVP_PKEY_CTX.
 442      * 2.  Do the provider specific signature fetch, from the same provider
 443      *     as |ctx->keymgmt|
 444      *
 445      * We then try to fetch the keymgmt from the same provider as the
 446      * signature, and try to export |ctx->pkey| to that keymgmt (when
 447      * this keymgmt happens to be the same as |ctx->keymgmt|, the export
 448      * is a no-op, but we call it anyway to not complicate the code even
 449      * more).
 450      * If the export call succeeds (returns a non-NULL provider key pointer),
 451      * we're done and can perform the operation itself.  If not, we perform
 452      * the second iteration, or jump to legacy.
 453      */
 454     for (iter = 1; iter < 3 && provkey == NULL; iter++) {
 455         EVP_KEYMGMT *tmp_keymgmt_tofree = NULL;
 456
 457         /*
 458          * If we're on the second iteration, free the results from the first.
 459          * They are NULL on the first iteration, so no need to check what
 460          * iteration we're on.
 461          */
 462         EVP_SIGNATURE_free(signature);
 463         EVP_KEYMGMT_free(tmp_keymgmt);
 464
 465         switch (iter) {
 466         case 1:
 467             signature =
 468                 EVP_SIGNATURE_fetch(ctx->libctx, supported_sig, ctx->propquery);
 469             if (signature != NULL)
 470                 tmp_prov = EVP_SIGNATURE_get0_provider(signature);
 471             break;
 472         case 2:
 473             tmp_prov = EVP_KEYMGMT_get0_provider(ctx->keymgmt);
 474             signature =
 475                 evp_signature_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
 476                                               supported_sig, ctx->propquery);
 477             if (signature == NULL)
 478                 goto legacy;
 479             break;
 480         }
 481         if (signature == NULL)
 482             continue;
 483
 484         /*
 485          * Ensure that the key is provided, either natively, or as a cached
 486          * export.  We start by fetching the keymgmt with the same name as
 487          * |ctx->pkey|, but from the provider of the signature method, using
 488          * the same property query as when fetching the signature method.
 489          * With the keymgmt we found (if we did), we try to export |ctx->pkey|
 490          * to it (evp_pkey_export_to_provider() is smart enough to only actually
 491
 492          * export it if |tmp_keymgmt| is different from |ctx->pkey|'s keymgmt)
 493          */
 494         tmp_keymgmt_tofree = tmp_keymgmt =
 495             evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
 496                                         EVP_KEYMGMT_get0_name(ctx->keymgmt),
 497                                         ctx->propquery);
 498         if (tmp_keymgmt != NULL)
 499             provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
 500                                                   &tmp_keymgmt, ctx->propquery);
 501         if (tmp_keymgmt == NULL)
 502             EVP_KEYMGMT_free(tmp_keymgmt_tofree);
 503     }
 504
 505     if (provkey == NULL) {
 506         EVP_SIGNATURE_free(signature);
 507         goto legacy;
 508     }
 509
 510     ERR_pop_to_mark();
 511
 512     /* No more legacy from here down to legacy: */
 513
 514     ctx->op.sig.signature = signature;
 515     ctx->op.sig.algctx =
 516         signature->newctx(ossl_provider_ctx(signature->prov), ctx->propquery);
 517     if (ctx->op.sig.algctx == NULL) {
 518         /* The provider key can stay in the cache */
 519         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 520         goto err;
 521     }
 522
 523     switch (operation) {
 524     case EVP_PKEY_OP_SIGN:
 525         if (signature->sign_init == NULL) {
 526             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 527             ret = -2;
 528             goto err;
 529         }
 530         ret = signature->sign_init(ctx->op.sig.algctx, provkey, params);
 531         break;
 532     case EVP_PKEY_OP_VERIFY:
 533         if (signature->verify_init == NULL) {
 534             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 535             ret = -2;
 536             goto err;
 537         }
 538         ret = signature->verify_init(ctx->op.sig.algctx, provkey, params);
 539         break;
 540     case EVP_PKEY_OP_VERIFYRECOVER:
 541         if (signature->verify_recover_init == NULL) {
 542             ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 543             ret = -2;
 544             goto err;
 545         }
 546         ret = signature->verify_recover_init(ctx->op.sig.algctx, provkey,
 547                                              params);
 548         break;
 549     default:
 550         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 551         goto err;
 552     }
 553
 554     if (ret <= 0) {
 555         signature->freectx(ctx->op.sig.algctx);
 556         ctx->op.sig.algctx = NULL;
 557         goto err;
 558     }
 559     goto end;
 560
 561  legacy:
 562     /*
 563      * If we don't have the full support we need with provided methods,
 564      * let's go see if legacy does.
 565      */
 566     ERR_pop_to_mark();
 567     EVP_KEYMGMT_free(tmp_keymgmt);
 568     tmp_keymgmt = NULL;
 569
 570     if (ctx->pmeth == NULL
 571             || (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
 572             || (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
 573             || (operation == EVP_PKEY_OP_VERIFYRECOVER
 574                 && ctx->pmeth->verify_recover == NULL)) {
 575         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 576         return -2;
 577     }
 578
 579     switch (operation) {
 580     case EVP_PKEY_OP_SIGN:
 581         if (ctx->pmeth->sign_init == NULL)
 582             return 1;
 583         ret = ctx->pmeth->sign_init(ctx);
 584         break;
 585     case EVP_PKEY_OP_VERIFY:
 586         if (ctx->pmeth->verify_init == NULL)
 587             return 1;
 588         ret = ctx->pmeth->verify_init(ctx);
 589         break;
 590     case EVP_PKEY_OP_VERIFYRECOVER:
 591         if (ctx->pmeth->verify_recover_init == NULL)
 592             return 1;
 593         ret = ctx->pmeth->verify_recover_init(ctx);
 594         break;
 595     default:
 596         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 597         goto err;
 598     }
 599     if (ret <= 0)
 600         goto err;
 601  end:
 602 #ifndef FIPS_MODULE
 603     if (ret > 0)
 604         ret = evp_pkey_ctx_use_cached_data(ctx);
 605 #endif
 606
 607     EVP_KEYMGMT_free(tmp_keymgmt);
 608     return ret;
 609  err:
 610     evp_pkey_ctx_free_old_ops(ctx);
 611     ctx->operation = EVP_PKEY_OP_UNDEFINED;
 612     EVP_KEYMGMT_free(tmp_keymgmt);
 613     return ret;
 614 }
 615
 616 int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
 617 {
 618     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN, NULL);
 619 }
 620
 621 int EVP_PKEY_sign_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
 622 {
 623     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN, params);
 624 }
 625
 626 int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
 627                   unsigned char *sig, size_t *siglen,
 628                   const unsigned char *tbs, size_t tbslen)
 629 {
 630     int ret;
 631
 632     if (ctx == NULL) {
 633         ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
 634         return -1;
 635     }
 636
 637     if (ctx->operation != EVP_PKEY_OP_SIGN) {
 638         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 639         return -1;
 640     }
 641
 642     if (ctx->op.sig.algctx == NULL)
 643         goto legacy;
 644
 645     if (ctx->op.sig.signature->sign == NULL) {
 646         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 647         return -2;
 648     }
 649
 650     ret = ctx->op.sig.signature->sign(ctx->op.sig.algctx, sig, siglen,
 651                                       (sig == NULL) ? 0 : *siglen, tbs, tbslen);
 652
 653     return ret;
 654  legacy:
 655
 656     if (ctx->pmeth == NULL || ctx->pmeth->sign == NULL) {
 657         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 658         return -2;
 659     }
 660
 661     M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
 662         return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
 663 }
 664
 665 int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
 666 {
 667     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY, NULL);
 668 }
 669
 670 int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
 671 {
 672     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY, params);
 673 }
 674
 675 int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
 676                     const unsigned char *sig, size_t siglen,
 677                     const unsigned char *tbs, size_t tbslen)
 678 {
 679     int ret;
 680
 681     if (ctx == NULL) {
 682         ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
 683         return -1;
 684     }
 685
 686     if (ctx->operation != EVP_PKEY_OP_VERIFY) {
 687         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 688         return -1;
 689     }
 690
 691     if (ctx->op.sig.algctx == NULL)
 692         goto legacy;
 693
 694     if (ctx->op.sig.signature->verify == NULL) {
 695         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 696         return -2;
 697     }
 698
 699     ret = ctx->op.sig.signature->verify(ctx->op.sig.algctx, sig, siglen,
 700                                         tbs, tbslen);
 701
 702     return ret;
 703  legacy:
 704     if (ctx->pmeth == NULL || ctx->pmeth->verify == NULL) {
 705         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 706         return -2;
 707     }
 708
 709     return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
 710 }
 711
 712 int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
 713 {
 714     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER, NULL);
 715 }
 716
 717 int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX *ctx,
 718                                     const OSSL_PARAM params[])
 719 {
 720     return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER, params);
 721 }
 722
 723 int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
 724                             unsigned char *rout, size_t *routlen,
 725                             const unsigned char *sig, size_t siglen)
 726 {
 727     int ret;
 728
 729     if (ctx == NULL) {
 730         ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
 731         return -1;
 732     }
 733
 734     if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
 735         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
 736         return -1;
 737     }
 738
 739     if (ctx->op.sig.algctx == NULL)
 740         goto legacy;
 741
 742     if (ctx->op.sig.signature->verify_recover == NULL) {
 743         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 744         return -2;
 745     }
 746
 747     ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.algctx, rout,
 748                                                 routlen,
 749                                                 (rout == NULL ? 0 : *routlen),
 750                                                 sig, siglen);
 751     return ret;
 752  legacy:
 753     if (ctx->pmeth == NULL || ctx->pmeth->verify_recover == NULL) {
 754         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 755         return -2;
 756     }
 757     M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
 758         return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
 759 }