crypto/evp/m_sigver.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 "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 "internal/numbers.h"   /* includes SIZE_MAX */
  18 #include "evp_local.h"
  19
  20 #ifndef FIPS_MODULE
  21
  22 static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
  23 {
  24     ERR_raise(ERR_LIB_EVP, EVP_R_ONLY_ONESHOT_SUPPORTED);
  25     return 0;
  26 }
  27
  28 /*
  29  * If we get the "NULL" md then the name comes back as "UNDEF". We want to use
  30  * NULL for this.
  31  */
  32 static const char *canon_mdname(const char *mdname)
  33 {
  34     if (mdname != NULL && strcmp(mdname, "UNDEF") == 0)
  35         return NULL;
  36
  37     return mdname;
  38 }
  39
  40 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
  41                           const EVP_MD *type, const char *mdname,
  42                           OSSL_LIB_CTX *libctx, const char *props,
  43                           ENGINE *e, EVP_PKEY *pkey, int ver,
  44                           OSSL_PARAM params[])
  45 {
  46     EVP_PKEY_CTX *locpctx = NULL;
  47     EVP_SIGNATURE *signature = NULL;
  48     EVP_KEYMGMT *tmp_keymgmt = NULL;
  49     const char *supported_sig = NULL;
  50     char locmdname[80] = "";     /* 80 chars should be enough */
  51     void *provkey = NULL;
  52     int ret;
  53
  54     if (ctx->algctx != NULL) {
  55         if (!ossl_assert(ctx->digest != NULL)) {
  56             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
  57             return 0;
  58         }
  59         if (ctx->digest->freectx != NULL)
  60             ctx->digest->freectx(ctx->algctx);
  61         ctx->algctx = NULL;
  62     }
  63
  64     if (ctx->pctx == NULL) {
  65         if (e == NULL)
  66             ctx->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, props);
  67         else
  68             ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
  69     }
  70     if (ctx->pctx == NULL)
  71         return 0;
  72
  73     locpctx = ctx->pctx;
  74     evp_pkey_ctx_free_old_ops(locpctx);
  75
  76     if (props == NULL)
  77         props = locpctx->propquery;
  78
  79     ERR_set_mark();
  80
  81     if (evp_pkey_ctx_is_legacy(locpctx))
  82         goto legacy;
  83
  84     /*
  85      * Ensure that the key is provided, either natively, or as a cached export.
  86      */
  87     tmp_keymgmt = locpctx->keymgmt;
  88     provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx,
  89                                           &tmp_keymgmt, locpctx->propquery);
  90     if (provkey == NULL) {
  91         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
  92         goto err;
  93     }
  94     if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
  95         ERR_clear_last_mark();
  96         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
  97         goto err;
  98     }
  99     EVP_KEYMGMT_free(locpctx->keymgmt);
 100     locpctx->keymgmt = tmp_keymgmt;
 101
 102     if (locpctx->keymgmt->query_operation_name != NULL)
 103         supported_sig =
 104             locpctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
 105
 106     /*
 107      * If we didn't get a supported sig, assume there is one with the
 108      * same name as the key type.
 109      */
 110     if (supported_sig == NULL)
 111         supported_sig = locpctx->keytype;
 112
 113     /*
 114      * Because we cleared out old ops, we shouldn't need to worry about
 115      * checking if signature is already there.
 116      */
 117     signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig,
 118                                     locpctx->propquery);
 119
 120     if (signature == NULL
 121         || (EVP_KEYMGMT_get0_provider(locpctx->keymgmt)
 122             != EVP_SIGNATURE_get0_provider(signature))) {
 123         /*
 124          * We don't need to free ctx->keymgmt here, as it's not necessarily
 125          * tied to this operation.  It will be freed by EVP_PKEY_CTX_free().
 126          */
 127         EVP_SIGNATURE_free(signature);
 128         goto legacy;
 129     }
 130
 131     /*
 132      * If we don't have the full support we need with provided methods,
 133      * let's go see if legacy does.
 134      */
 135     ERR_pop_to_mark();
 136
 137     /* No more legacy from here down to legacy: */
 138
 139     if (pctx != NULL)
 140         *pctx = locpctx;
 141
 142     locpctx->op.sig.signature = signature;
 143     locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
 144                              : EVP_PKEY_OP_SIGNCTX;
 145     locpctx->op.sig.algctx
 146         = signature->newctx(ossl_provider_ctx(signature->prov), props);
 147     if (locpctx->op.sig.algctx == NULL) {
 148         ERR_raise(ERR_LIB_EVP,  EVP_R_INITIALIZATION_ERROR);
 149         goto err;
 150     }
 151     if (type != NULL) {
 152         ctx->reqdigest = type;
 153         if (mdname == NULL)
 154             mdname = canon_mdname(EVP_MD_get0_name(type));
 155     } else {
 156         if (mdname == NULL) {
 157             if (evp_keymgmt_util_get_deflt_digest_name(tmp_keymgmt, provkey,
 158                                                        locmdname,
 159                                                        sizeof(locmdname)) > 0) {
 160                 mdname = canon_mdname(locmdname);
 161             }
 162         }
 163
 164         if (mdname != NULL) {
 165             /*
 166              * We're about to get a new digest so clear anything associated with
 167              * an old digest.
 168              */
 169             evp_md_ctx_clear_digest(ctx, 1);
 170
 171             /* legacy code support for engines */
 172             ERR_set_mark();
 173             /*
 174              * This might be requested by a later call to EVP_MD_CTX_get0_md().
 175              * In that case the "explicit fetch" rules apply for that
 176              * function (as per man pages), i.e. the ref count is not updated
 177              * so the EVP_MD should not be used beyound the lifetime of the
 178              * EVP_MD_CTX.
 179              */
 180             ctx->fetched_digest = EVP_MD_fetch(locpctx->libctx, mdname, props);
 181             if (ctx->fetched_digest != NULL) {
 182                 ctx->digest = ctx->reqdigest = ctx->fetched_digest;
 183             } else {
 184                 /* legacy engine support : remove the mark when this is deleted */
 185                 ctx->reqdigest = ctx->digest = EVP_get_digestbyname(mdname);
 186                 if (ctx->digest == NULL) {
 187                     (void)ERR_clear_last_mark();
 188                     ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 189                     goto err;
 190                 }
 191             }
 192             (void)ERR_pop_to_mark();
 193         }
 194     }
 195
 196     if (ver) {
 197         if (signature->digest_verify_init == NULL) {
 198             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 199             goto err;
 200         }
 201         ret = signature->digest_verify_init(locpctx->op.sig.algctx,
 202                                             mdname, provkey, params);
 203     } else {
 204         if (signature->digest_sign_init == NULL) {
 205             ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 206             goto err;
 207         }
 208         ret = signature->digest_sign_init(locpctx->op.sig.algctx,
 209                                           mdname, provkey, params);
 210     }
 211
 212     goto end;
 213
 214  err:
 215     evp_pkey_ctx_free_old_ops(locpctx);
 216     locpctx->operation = EVP_PKEY_OP_UNDEFINED;
 217     return 0;
 218
 219  legacy:
 220     /*
 221      * If we don't have the full support we need with provided methods,
 222      * let's go see if legacy does.
 223      */
 224     ERR_pop_to_mark();
 225
 226     if (type == NULL && mdname != NULL)
 227         type = evp_get_digestbyname_ex(locpctx->libctx, mdname);
 228
 229     if (ctx->pctx->pmeth == NULL) {
 230         ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 231         return 0;
 232     }
 233
 234     if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
 235
 236         if (type == NULL) {
 237             int def_nid;
 238             if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
 239                 type = EVP_get_digestbynid(def_nid);
 240         }
 241
 242         if (type == NULL) {
 243             ERR_raise(ERR_LIB_EVP, EVP_R_NO_DEFAULT_DIGEST);
 244             return 0;
 245         }
 246     }
 247
 248     if (ver) {
 249         if (ctx->pctx->pmeth->verifyctx_init) {
 250             if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
 251                 return 0;
 252             ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
 253         } else if (ctx->pctx->pmeth->digestverify != 0) {
 254             ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
 255             ctx->update = update;
 256         } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
 257             return 0;
 258         }
 259     } else {
 260         if (ctx->pctx->pmeth->signctx_init) {
 261             if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
 262                 return 0;
 263             ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
 264         } else if (ctx->pctx->pmeth->digestsign != 0) {
 265             ctx->pctx->operation = EVP_PKEY_OP_SIGN;
 266             ctx->update = update;
 267         } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
 268             return 0;
 269         }
 270     }
 271     if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
 272         return 0;
 273     if (pctx)
 274         *pctx = ctx->pctx;
 275     if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
 276         return 1;
 277     if (!EVP_DigestInit_ex(ctx, type, e))
 278         return 0;
 279     /*
 280      * This indicates the current algorithm requires
 281      * special treatment before hashing the tbs-message.
 282      */
 283     ctx->pctx->flag_call_digest_custom = 0;
 284     if (ctx->pctx->pmeth->digest_custom != NULL)
 285         ctx->pctx->flag_call_digest_custom = 1;
 286
 287     ret = 1;
 288
 289  end:
 290 #ifndef FIPS_MODULE
 291     if (ret > 0)
 292         ret = evp_pkey_ctx_use_cached_data(locpctx);
 293 #endif
 294
 295     return ret > 0 ? 1 : 0;
 296 }
 297
 298 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 299                           const char *mdname, OSSL_LIB_CTX *libctx,
 300                           const char *props, EVP_PKEY *pkey,
 301                           OSSL_PARAM params[])
 302 {
 303     return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 0,
 304                           params);
 305 }
 306
 307 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 308                        const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
 309 {
 310     return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 0,
 311                           NULL);
 312 }
 313
 314 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 315                             const char *mdname, OSSL_LIB_CTX *libctx,
 316                             const char *props, EVP_PKEY *pkey,
 317                             OSSL_PARAM params[])
 318 {
 319     return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 1,
 320                           params);
 321 }
 322
 323 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
 324                          const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
 325 {
 326     return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 1,
 327                           NULL);
 328 }
 329 #endif /* FIPS_MDOE */
 330
 331 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
 332 {
 333     EVP_PKEY_CTX *pctx = ctx->pctx;
 334
 335     if (pctx == NULL
 336             || pctx->operation != EVP_PKEY_OP_SIGNCTX
 337             || pctx->op.sig.algctx == NULL
 338             || pctx->op.sig.signature == NULL)
 339         goto legacy;
 340
 341     if (pctx->op.sig.signature->digest_sign_update == NULL) {
 342         ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 343         return 0;
 344     }
 345
 346     return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.algctx,
 347                                                       data, dsize);
 348
 349  legacy:
 350     if (pctx != NULL) {
 351         /* do_sigver_init() checked that |digest_custom| is non-NULL */
 352         if (pctx->flag_call_digest_custom
 353             && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 354             return 0;
 355         pctx->flag_call_digest_custom = 0;
 356     }
 357
 358     return EVP_DigestUpdate(ctx, data, dsize);
 359 }
 360
 361 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
 362 {
 363     EVP_PKEY_CTX *pctx = ctx->pctx;
 364
 365     if (pctx == NULL
 366             || pctx->operation != EVP_PKEY_OP_VERIFYCTX
 367             || pctx->op.sig.algctx == NULL
 368             || pctx->op.sig.signature == NULL)
 369         goto legacy;
 370
 371     if (pctx->op.sig.signature->digest_verify_update == NULL) {
 372         ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
 373         return 0;
 374     }
 375
 376     return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.algctx,
 377                                                         data, dsize);
 378
 379  legacy:
 380     if (pctx != NULL) {
 381         /* do_sigver_init() checked that |digest_custom| is non-NULL */
 382         if (pctx->flag_call_digest_custom
 383             && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 384             return 0;
 385         pctx->flag_call_digest_custom = 0;
 386     }
 387
 388     return EVP_DigestUpdate(ctx, data, dsize);
 389 }
 390
 391 #ifndef FIPS_MODULE
 392 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
 393                         size_t *siglen)
 394 {
 395     int sctx = 0, r = 0;
 396     EVP_PKEY_CTX *pctx = ctx->pctx;
 397
 398     if (pctx == NULL
 399             || pctx->operation != EVP_PKEY_OP_SIGNCTX
 400             || pctx->op.sig.algctx == NULL
 401             || pctx->op.sig.signature == NULL)
 402         goto legacy;
 403
 404     return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.algctx,
 405                                                      sigret, siglen, SIZE_MAX);
 406
 407  legacy:
 408     if (pctx == NULL || pctx->pmeth == NULL) {
 409         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 410         return 0;
 411     }
 412
 413     /* do_sigver_init() checked that |digest_custom| is non-NULL */
 414     if (pctx->flag_call_digest_custom
 415         && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 416         return 0;
 417     pctx->flag_call_digest_custom = 0;
 418
 419     if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
 420         if (sigret == NULL)
 421             return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 422         if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
 423             r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 424         else {
 425             EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(pctx);
 426
 427             if (dctx == NULL)
 428                 return 0;
 429             r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
 430             EVP_PKEY_CTX_free(dctx);
 431         }
 432         return r;
 433     }
 434     if (pctx->pmeth->signctx != NULL)
 435         sctx = 1;
 436     else
 437         sctx = 0;
 438     if (sigret != NULL) {
 439         unsigned char md[EVP_MAX_MD_SIZE];
 440         unsigned int mdlen = 0;
 441
 442         if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
 443             if (sctx)
 444                 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
 445             else
 446                 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
 447         } else {
 448             EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
 449
 450             if (tmp_ctx == NULL)
 451                 return 0;
 452             if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
 453                 EVP_MD_CTX_free(tmp_ctx);
 454                 return 0;
 455             }
 456             if (sctx)
 457                 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
 458                                                   sigret, siglen, tmp_ctx);
 459             else
 460                 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
 461             EVP_MD_CTX_free(tmp_ctx);
 462         }
 463         if (sctx || !r)
 464             return r;
 465         if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0)
 466             return 0;
 467     } else {
 468         if (sctx) {
 469             if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
 470                 return 0;
 471         } else {
 472             int s = EVP_MD_get_size(ctx->digest);
 473
 474             if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
 475                 return 0;
 476         }
 477     }
 478     return 1;
 479 }
 480
 481 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
 482                    const unsigned char *tbs, size_t tbslen)
 483 {
 484     EVP_PKEY_CTX *pctx = ctx->pctx;
 485
 486     if (pctx != NULL
 487             && pctx->operation == EVP_PKEY_OP_SIGNCTX
 488             && pctx->op.sig.algctx != NULL
 489             && pctx->op.sig.signature != NULL) {
 490         if (pctx->op.sig.signature->digest_sign != NULL)
 491             return pctx->op.sig.signature->digest_sign(pctx->op.sig.algctx,
 492                                                        sigret, siglen, SIZE_MAX,
 493                                                        tbs, tbslen);
 494     } else {
 495         /* legacy */
 496         if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL)
 497             return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
 498     }
 499
 500     if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
 501         return 0;
 502     return EVP_DigestSignFinal(ctx, sigret, siglen);
 503 }
 504
 505 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
 506                           size_t siglen)
 507 {
 508     unsigned char md[EVP_MAX_MD_SIZE];
 509     int r = 0;
 510     unsigned int mdlen = 0;
 511     int vctx = 0;
 512     EVP_PKEY_CTX *pctx = ctx->pctx;
 513
 514     if (pctx == NULL
 515             || pctx->operation != EVP_PKEY_OP_VERIFYCTX
 516             || pctx->op.sig.algctx == NULL
 517             || pctx->op.sig.signature == NULL)
 518         goto legacy;
 519
 520     return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.algctx,
 521                                                        sig, siglen);
 522
 523  legacy:
 524     if (pctx == NULL || pctx->pmeth == NULL) {
 525         ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
 526         return 0;
 527     }
 528
 529     /* do_sigver_init() checked that |digest_custom| is non-NULL */
 530     if (pctx->flag_call_digest_custom
 531         && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
 532         return 0;
 533     pctx->flag_call_digest_custom = 0;
 534
 535     if (pctx->pmeth->verifyctx != NULL)
 536         vctx = 1;
 537     else
 538         vctx = 0;
 539     if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
 540         if (vctx)
 541             r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx);
 542         else
 543             r = EVP_DigestFinal_ex(ctx, md, &mdlen);
 544     } else {
 545         EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
 546         if (tmp_ctx == NULL)
 547             return -1;
 548         if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
 549             EVP_MD_CTX_free(tmp_ctx);
 550             return -1;
 551         }
 552         if (vctx)
 553             r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
 554                                                 sig, siglen, tmp_ctx);
 555         else
 556             r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
 557         EVP_MD_CTX_free(tmp_ctx);
 558     }
 559     if (vctx || !r)
 560         return r;
 561     return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen);
 562 }
 563
 564 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
 565                      size_t siglen, const unsigned char *tbs, size_t tbslen)
 566 {
 567     EVP_PKEY_CTX *pctx = ctx->pctx;
 568
 569     if (pctx != NULL
 570             && pctx->operation == EVP_PKEY_OP_VERIFYCTX
 571             && pctx->op.sig.algctx != NULL
 572             && pctx->op.sig.signature != NULL) {
 573         if (pctx->op.sig.signature->digest_verify != NULL)
 574             return pctx->op.sig.signature->digest_verify(pctx->op.sig.algctx,
 575                                                          sigret, siglen,
 576                                                          tbs, tbslen);
 577     } else {
 578         /* legacy */
 579         if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL)
 580             return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
 581     }
 582
 583     if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
 584         return -1;
 585     return EVP_DigestVerifyFinal(ctx, sigret, siglen);
 586 }
 587 #endif /* FIPS_MODULE */