crypto/evp/m_sigver.c

   1 /*
   2  * Copyright 2006-2020 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 "internal/cryptlib.h"
  12 #include <openssl/evp.h>
  13 #include <openssl/objects.h>
  14 #include <openssl/x509.h>
  15 #include "crypto/evp.h"
  16 #include "internal/provider.h"
  17 #include "evp_local.h"
  18
  19 #ifndef FIPS_MODULE
  20
  21 static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
  22 {
  23     EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
  24     return 0;
  25 }
  26
  27 /*
  28  * If we get the "NULL" md then the name comes back as "UNDEF". We want to use
  29  * NULL for this.
  30  */
  31 static const char *canon_mdname(const char *mdname)
  32 {
  33     if (mdname != NULL && strcmp(mdname, "UNDEF") == 0)
  34         return NULL;
  35
  36     return mdname;
  37 }
  38
  39 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
  40                           const EVP_MD *type, const char *mdname,
  41                           OPENSSL_CTX *libctx, const char *props,
  42                           ENGINE *e, EVP_PKEY *pkey, int ver)
  43 {
  44     EVP_PKEY_CTX *locpctx = NULL;
  45     EVP_SIGNATURE *signature = NULL;
  46     EVP_KEYMGMT *tmp_keymgmt = NULL;
  47     const char *supported_sig = NULL;
  48     char locmdname[80] = "";     /* 80 chars should be enough */
  49     void *provkey = NULL;
  50     int ret;
  51
  52     if (ctx->provctx != NULL) {
  53         if (!ossl_assert(ctx->digest != NULL)) {
  54             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
  55             return 0;
  56         }
  57         if (ctx->digest->freectx != NULL)
  58             ctx->digest->freectx(ctx->provctx);
  59         ctx->provctx = NULL;
  60     }
  61
  62     if (ctx->pctx == NULL) {
  63         if (libctx != NULL)
  64             ctx->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, props);
  65         else
  66             ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
  67     }
  68     if (ctx->pctx == NULL)
  69         return 0;
  70
  71     locpctx = ctx->pctx;
  72     evp_pkey_ctx_free_old_ops(locpctx);
  73
  74     if (props == NULL)
  75         props = locpctx->propquery;
  76
  77     /*
  78      * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
  79      * calls can be removed.
  80      */
  81     ERR_set_mark();
  82
  83     if (locpctx->engine != NULL || locpctx->keytype == NULL)
  84         goto legacy;
  85
  86     /*
  87      * Ensure that the key is provided, either natively, or as a cached export.
  88      */
  89     tmp_keymgmt = locpctx->keymgmt;
  90     provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx,
  91                                           &tmp_keymgmt, locpctx->propquery);
  92     if (provkey == NULL) {
  93         /*
  94          * If we couldn't find a keymgmt at all try legacy.
  95          * TODO(3.0): Once all legacy algorithms (SM2, HMAC etc) have provider
  96          * based implementations this fallback shouldn't be necessary. Either
  97          * we have an ENGINE based implementation (in which case we should have
  98          * already fallen back in the test above here), or we don't have the
  99          * provider based implementation loaded (in which case this is an
 100          * application config error)
 101          */
 102         if (locpctx->keymgmt == NULL)
 103             goto legacy;
 104         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 105         goto err;
 106     }
 107     if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
 108         ERR_clear_last_mark();
 109         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 110         goto err;
 111     }
 112     EVP_KEYMGMT_free(locpctx->keymgmt);
 113     locpctx->keymgmt = tmp_keymgmt;
 114
 115     if (locpctx->keymgmt->query_operation_name != NULL)
 116         supported_sig =
 117             locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
 118
 119     /*
 120      * If we didn't get a supported sig, assume there is one with the
 121      * same name as the key type.
 122      */
 123     if (supported_sig == NULL)
 124         supported_sig = locpctx->keytype;
 125
 126     /*
 127      * Because we cleared out old ops, we shouldn't need to worry about
 128      * checking if signature is already there.
 129      */
 130     signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
 131                                     locpctx->propquery);
 132
 133     if (signature == NULL
 134         || (EVP_KEYMGMT_provider(locpctx->keymgmt)
 135             != EVP_SIGNATURE_provider(signature))) {
 136         /*
 137          * We don't need to free ctx->keymgmt here, as it's not necessarily
 138          * tied to this operation.  It will be freed by EVP_PKEY_CTX_free().
 139          */
 140         EVP_SIGNATURE_free(signature);
 141         goto legacy;
 142     }
 143
 144     /*
 145      * TODO remove this when legacy is gone
 146      * If we don't have the full support we need with provided methods,
 147      * let's go see if legacy does.
 148      */
 149     ERR_pop_to_mark();
 150
 151     /* No more legacy from here down to legacy: */
 152
 153     if (pctx != NULL)
 154         *pctx = locpctx;
 155
 156     locpctx->op.sig.signature = signature;
 157     locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
 158                              : EVP_PKEY_OP_SIGNCTX;
 159     locpctx->op.sig.sigprovctx
 160         = signature->newctx(ossl_provider_ctx(signature->prov), props);
 161     if (locpctx->op.sig.sigprovctx == NULL) {
 162         ERR_raise(ERR_LIB_EVP,  EVP_R_INITIALIZATION_ERROR);
 163         goto err;
 164     }
 165     if (type != NULL) {
 166         ctx->reqdigest = type;
 167         if (mdname == NULL)
 168             mdname = canon_mdname(EVP_MD_name(type));
 169     } else {
 170         if (mdname == NULL) {
 171             if (evp_keymgmt_util_get_deflt_digest_name(tmp_keymgmt, provkey,
 172                                                        locmdname,
 173                                                        sizeof(locmdname)) > 0) {
 174                 mdname = canon_mdname(locmdname);
 175             }
 176         }
 177
 178         if (mdname != NULL) {
 179             /*
 180              * We're about to get a new digest so clear anything associated with
 181              * an old digest.
 182              */
 183             evp_md_ctx_clear_digest(ctx, 1);
 184
 185             /*
 186              * This might be requested by a later call to EVP_MD_CTX_md().
 187              * In that case the "explicit fetch" rules apply for that
 188              * function (as per man pages), i.e. the ref count is not updated
 189              * so the EVP_MD should not be used beyound the lifetime of the
 190              * EVP_MD_CTX.
 191              */
 192             ctx->digest = ctx->reqdigest = ctx->fetched_digest =
 193                 EVP_MD_fetch(locpctx->libctx, mdname, props);
 194             if (ctx->digest == NULL) {
 195                 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 196                 goto err;
 197             }
 198         }
 199     }
 200
 201     if (ver) {
 202         if (signature->digest_verify_init == NULL) {
 203             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 204             goto err;
 205         }
 206         ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx,
 207                                             mdname, provkey);
 208     } else {
 209         if (signature->digest_sign_init == NULL) {
 210             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 211             goto err;
 212         }
 213         ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx,
 214                                           mdname, provkey);
 215     }
 216
 217     goto end;
 218
 219  err:
 220     evp_pkey_ctx_free_old_ops(locpctx);
 221     locpctx->operation = EVP_PKEY_OP_UNDEFINED;
 222     return 0;
 223
 224  legacy:
 225     /*
 226      * TODO remove this when legacy is gone
 227      * If we don't have the full support we need with provided methods,
 228      * let's go see if legacy does.
 229      */
 230     ERR_pop_to_mark();
 231
 232     if (type == NULL && mdname != NULL)
 233         type = evp_get_digestbyname_ex(locpctx->libctx, mdname);
 234
 235     if (ctx->pctx->pmeth == NULL) {
 236         EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 237         return 0;
 238     }
 239
 240     if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
 241
 242         if (type == NULL) {
 243             int def_nid;
 244             if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
 245                 type = EVP_get_digestbynid(def_nid);
 246         }
 247
 248         if (type == NULL) {
 249             EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
 250             return 0;
 251         }
 252     }
 253
 254     if (ver) {
 255         if (ctx->pctx->pmeth->verifyctx_init) {
 256             if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
 257                 return 0;
 258             ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
 259         } else if (ctx->pctx->pmeth->digestverify != 0) {
 260             ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
 261             ctx->update = update;
 262         } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
 263             return 0;
 264         }
 265     } else {
 266         if (ctx->pctx->pmeth->signctx_init) {
 267             if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
 268                 return 0;
 269             ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
 270         } else if (ctx->pctx->pmeth->digestsign != 0) {
 271             ctx->pctx->operation = EVP_PKEY_OP_SIGN;
 272             ctx->update = update;
 273         } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
 274             return 0;
 275         }
 276     }
 277     if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
 278         return 0;
 279     if (pctx)
 280         *pctx = ctx->pctx;
 281     if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
 282         return 1;
 283     if (!EVP_DigestInit_ex(ctx, type, e))
 284         return 0;
 285     /*
 286      * This indicates the current algorithm requires
 287      * special treatment before hashing the tbs-message.
 288      */
 289     ctx->pctx->flag_call_digest_custom = 0;
 290     if (ctx->pctx->pmeth->digest_custom != NULL)
 291         ctx->pctx->flag_call_digest_custom = 1;
 292
 293     ret = 1;
 294
 295  end:
 296 #ifndef FIPS_MODULE
 297     if (ret > 0)
 298         ret = evp_pkey_ctx_use_cached_data(locpctx);
 299 #endif
 300
 301     return ret > 0 ? 1 : 0;
 302 }
 303
 304 int EVP_DigestSignInit_with_libctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 305                                    const char *mdname,
 306                                    OPENSSL_CTX *libctx, const char *props,
 307                                    EVP_PKEY *pkey)
 308 {
 309     return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 0);
 310 }
 311
 312 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 313                        const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
 314 {
 315     return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 0);
 316 }
 317
 318 int EVP_DigestVerifyInit_with_libctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 319                                      const char *mdname,
 320                                      OPENSSL_CTX *libctx, const char *props,
 321                                      EVP_PKEY *pkey)
 322 {
 323     return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 1);
 324 }
 325
 326 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 327                          const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
 328 {
 329     return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 1);
 330 }
 331 #endif /* FIPS_MDOE */
 332
 333 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
 334 {
 335     EVP_PKEY_CTX *pctx = ctx->pctx;
 336
 337     if (pctx == NULL
 338             || pctx->operation != EVP_PKEY_OP_SIGNCTX
 339             || pctx->op.sig.sigprovctx == NULL
 340             || pctx->op.sig.signature == NULL)
 341         goto legacy;
 342
 343     if (pctx->op.sig.signature->digest_sign_update == NULL) {
 344         ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 345         return 0;
 346     }
 347
 348     return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
 349                                                       data, dsize);
 350
 351  legacy:
 352     if (pctx != NULL) {
 353         /* do_sigver_init() checked that |digest_custom| is non-NULL */
 354         if (pctx->flag_call_digest_custom
 355             && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 356             return 0;
 357         pctx->flag_call_digest_custom = 0;
 358     }
 359
 360     return EVP_DigestUpdate(ctx, data, dsize);
 361 }
 362
 363 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
 364 {
 365     EVP_PKEY_CTX *pctx = ctx->pctx;
 366
 367     if (pctx == NULL
 368             || pctx->operation != EVP_PKEY_OP_VERIFYCTX
 369             || pctx->op.sig.sigprovctx == NULL
 370             || pctx->op.sig.signature == NULL)
 371         goto legacy;
 372
 373     if (pctx->op.sig.signature->digest_verify_update == NULL) {
 374         ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 375         return 0;
 376     }
 377
 378     return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
 379                                                         data, dsize);
 380
 381  legacy:
 382     if (pctx != NULL) {
 383         /* do_sigver_init() checked that |digest_custom| is non-NULL */
 384         if (pctx->flag_call_digest_custom
 385             && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 386             return 0;
 387         pctx->flag_call_digest_custom = 0;
 388     }
 389
 390     return EVP_DigestUpdate(ctx, data, dsize);
 391 }
 392
 393 #ifndef FIPS_MODULE
 394 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
 395                         size_t *siglen)
 396 {
 397     int sctx = 0, r = 0;
 398     EVP_PKEY_CTX *pctx = ctx->pctx;
 399
 400     if (pctx == NULL
 401             || pctx->operation != EVP_PKEY_OP_SIGNCTX
 402             || pctx->op.sig.sigprovctx == NULL
 403             || pctx->op.sig.signature == NULL)
 404         goto legacy;
 405
 406     return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
 407                                                      sigret, siglen, SIZE_MAX);
 408
 409  legacy:
 410     if (pctx == NULL || pctx->pmeth == NULL) {
 411         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 412         return 0;
 413     }
 414
 415     /* do_sigver_init() checked that |digest_custom| is non-NULL */
 416     if (pctx->flag_call_digest_custom
 417         && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 418         return 0;
 419     pctx->flag_call_digest_custom = 0;
 420
 421     if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
 422         if (sigret == NULL)
 423             return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 424         if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
 425             r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 426         else {
 427             EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
 428
 429             if (dctx == NULL)
 430                 return 0;
 431             r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
 432             EVP_PKEY_CTX_free(dctx);
 433         }
 434         return r;
 435     }
 436     if (pctx->pmeth->signctx != NULL)
 437         sctx = 1;
 438     else
 439         sctx = 0;
 440     if (sigret != NULL) {
 441         unsigned char md[EVP_MAX_MD_SIZE];
 442         unsigned int mdlen = 0;
 443
 444         if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
 445             if (sctx)
 446                 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 447             else
 448                 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
 449         } else {
 450             EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
 451
 452             if (tmp_ctx == NULL)
 453                 return 0;
 454             if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
 455                 EVP_MD_CTX_free(tmp_ctx);
 456                 return 0;
 457             }
 458             if (sctx)
 459                 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
 460                                                   sigret, siglen, tmp_ctx);
 461             else
 462                 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
 463             EVP_MD_CTX_free(tmp_ctx);
 464         }
 465         if (sctx || !r)
 466             return r;
 467         if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
 468             return 0;
 469     } else {
 470         if (sctx) {
 471             if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
 472                 return 0;
 473         } else {
 474             int s = EVP_MD_size(ctx->digest);
 475
 476             if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
 477                 return 0;
 478         }
 479     }
 480     return 1;
 481 }
 482
 483 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
 484                    const unsigned char *tbs, size_t tbslen)
 485 {
 486     EVP_PKEY_CTX *pctx = ctx->pctx;
 487
 488     if (pctx != NULL
 489             && pctx->operation == EVP_PKEY_OP_SIGNCTX
 490             && pctx->op.sig.sigprovctx != NULL
 491             && pctx->op.sig.signature != NULL) {
 492         if (pctx->op.sig.signature->digest_sign != NULL)
 493             return pctx->op.sig.signature->digest_sign(pctx->op.sig.sigprovctx,
 494                                                        sigret, siglen, SIZE_MAX,
 495                                                        tbs, tbslen);
 496     } else {
 497         /* legacy */
 498         if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
 499             return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
 500     }
 501
 502     if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
 503         return 0;
 504     return EVP_DigestSignFinal(ctx, sigret, siglen);
 505 }
 506
 507 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
 508                           size_t siglen)
 509 {
 510     unsigned char md[EVP_MAX_MD_SIZE];
 511     int r = 0;
 512     unsigned int mdlen = 0;
 513     int vctx = 0;
 514     EVP_PKEY_CTX *pctx = ctx->pctx;
 515
 516     if (pctx == NULL
 517             || pctx->operation != EVP_PKEY_OP_VERIFYCTX
 518             || pctx->op.sig.sigprovctx == NULL
 519             || pctx->op.sig.signature == NULL)
 520         goto legacy;
 521
 522     return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
 523                                                        sig, siglen);
 524
 525  legacy:
 526     if (pctx == NULL || pctx->pmeth == NULL) {
 527         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 528         return 0;
 529     }
 530
 531     /* do_sigver_init() checked that |digest_custom| is non-NULL */
 532     if (pctx->flag_call_digest_custom
 533         && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 534         return 0;
 535     pctx->flag_call_digest_custom = 0;
 536
 537     if (pctx->pmeth->verifyctx != NULL)
 538         vctx = 1;
 539     else
 540         vctx = 0;
 541     if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
 542         if (vctx)
 543             r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
 544         else
 545             r = EVP_DigestFinal_ex(ctx, md, &mdlen);
 546     } else {
 547         EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
 548         if (tmp_ctx == NULL)
 549             return -1;
 550         if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
 551             EVP_MD_CTX_free(tmp_ctx);
 552             return -1;
 553         }
 554         if (vctx)
 555             r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
 556                                                 sig, siglen, tmp_ctx);
 557         else
 558             r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
 559         EVP_MD_CTX_free(tmp_ctx);
 560     }
 561     if (vctx || !r)
 562         return r;
 563     return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
 564 }
 565
 566 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
 567                      size_t siglen, const unsigned char *tbs, size_t tbslen)
 568 {
 569     EVP_PKEY_CTX *pctx = ctx->pctx;
 570
 571     if (pctx != NULL
 572             && pctx->operation == EVP_PKEY_OP_VERIFYCTX
 573             && pctx->op.sig.sigprovctx != NULL
 574             && pctx->op.sig.signature != NULL) {
 575         if (pctx->op.sig.signature->digest_verify != NULL)
 576             return pctx->op.sig.signature->digest_verify(pctx->op.sig.sigprovctx,
 577                                                          sigret, siglen,
 578                                                          tbs, tbslen);
 579     } else {
 580         /* legacy */
 581         if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
 582             return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
 583     }
 584
 585     if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
 586         return -1;
 587     return EVP_DigestVerifyFinal(ctx, sigret, siglen);
 588 }
 589 #endif /* FIPS_MODULE */