providers/implementations/signature/ecdsa.c

   1 /*
   2  * Copyright 2020-2021 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 /*
  11  * ECDSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <string.h> /* memcpy */
  17 #include <openssl/crypto.h>
  18 #include <openssl/core_dispatch.h>
  19 #include <openssl/core_names.h>
  20 #include <openssl/dsa.h>
  21 #include <openssl/params.h>
  22 #include <openssl/evp.h>
  23 #include <openssl/err.h>
  24 #include <openssl/proverr.h>
  25 #include "internal/nelem.h"
  26 #include "internal/sizes.h"
  27 #include "internal/cryptlib.h"
  28 #include "prov/providercommon.h"
  29 #include "prov/implementations.h"
  30 #include "prov/provider_ctx.h"
  31 #include "prov/securitycheck.h"
  32 #include "crypto/ec.h"
  33 #include "prov/der_ec.h"
  34
  35 static OSSL_FUNC_signature_newctx_fn ecdsa_newctx;
  36 static OSSL_FUNC_signature_sign_init_fn ecdsa_sign_init;
  37 static OSSL_FUNC_signature_verify_init_fn ecdsa_verify_init;
  38 static OSSL_FUNC_signature_sign_fn ecdsa_sign;
  39 static OSSL_FUNC_signature_verify_fn ecdsa_verify;
  40 static OSSL_FUNC_signature_digest_sign_init_fn ecdsa_digest_sign_init;
  41 static OSSL_FUNC_signature_digest_sign_update_fn ecdsa_digest_signverify_update;
  42 static OSSL_FUNC_signature_digest_sign_final_fn ecdsa_digest_sign_final;
  43 static OSSL_FUNC_signature_digest_verify_init_fn ecdsa_digest_verify_init;
  44 static OSSL_FUNC_signature_digest_verify_update_fn ecdsa_digest_signverify_update;
  45 static OSSL_FUNC_signature_digest_verify_final_fn ecdsa_digest_verify_final;
  46 static OSSL_FUNC_signature_freectx_fn ecdsa_freectx;
  47 static OSSL_FUNC_signature_dupctx_fn ecdsa_dupctx;
  48 static OSSL_FUNC_signature_get_ctx_params_fn ecdsa_get_ctx_params;
  49 static OSSL_FUNC_signature_gettable_ctx_params_fn ecdsa_gettable_ctx_params;
  50 static OSSL_FUNC_signature_set_ctx_params_fn ecdsa_set_ctx_params;
  51 static OSSL_FUNC_signature_settable_ctx_params_fn ecdsa_settable_ctx_params;
  52 static OSSL_FUNC_signature_get_ctx_md_params_fn ecdsa_get_ctx_md_params;
  53 static OSSL_FUNC_signature_gettable_ctx_md_params_fn ecdsa_gettable_ctx_md_params;
  54 static OSSL_FUNC_signature_set_ctx_md_params_fn ecdsa_set_ctx_md_params;
  55 static OSSL_FUNC_signature_settable_ctx_md_params_fn ecdsa_settable_ctx_md_params;
  56
  57 /*
  58  * What's passed as an actual key is defined by the KEYMGMT interface.
  59  * We happen to know that our KEYMGMT simply passes DSA structures, so
  60  * we use that here too.
  61  */
  62
  63 typedef struct {
  64     OSSL_LIB_CTX *libctx;
  65     char *propq;
  66     EC_KEY *ec;
  67     char mdname[OSSL_MAX_NAME_SIZE];
  68
  69     /*
  70      * Flag to determine if the hash function can be changed (1) or not (0)
  71      * Because it's dangerous to change during a DigestSign or DigestVerify
  72      * operation, this flag is cleared by their Init function, and set again
  73      * by their Final function.
  74      */
  75     unsigned int flag_allow_md : 1;
  76
  77     /* The Algorithm Identifier of the combined signature algorithm */
  78     unsigned char aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
  79     unsigned char *aid;
  80     size_t  aid_len;
  81     size_t mdsize;
  82     int operation;
  83
  84     EVP_MD *md;
  85     EVP_MD_CTX *mdctx;
  86     /*
  87      * Internally used to cache the results of calling the EC group
  88      * sign_setup() methods which are then passed to the sign operation.
  89      * This is used by CAVS failure tests to terminate a loop if the signature
  90      * is not valid.
  91      * This could of also been done with a simple flag.
  92      */
  93     BIGNUM *kinv;
  94     BIGNUM *r;
  95 #if !defined(OPENSSL_NO_ACVP_TESTS)
  96     /*
  97      * This indicates that KAT (CAVS) test is running. Externally an app will
  98      * override the random callback such that the generated private key and k
  99      * are known.
 100      * Normal operation will loop to choose a new k if the signature is not
 101      * valid - but for this mode of operation it forces a failure instead.
 102      */
 103     unsigned int kattest;
 104 #endif
 105 } PROV_ECDSA_CTX;
 106
 107 static void *ecdsa_newctx(void *provctx, const char *propq)
 108 {
 109     PROV_ECDSA_CTX *ctx;
 110
 111     if (!ossl_prov_is_running())
 112         return NULL;
 113
 114     ctx = OPENSSL_zalloc(sizeof(PROV_ECDSA_CTX));
 115     if (ctx == NULL)
 116         return NULL;
 117
 118     ctx->flag_allow_md = 1;
 119     ctx->libctx = PROV_LIBCTX_OF(provctx);
 120     if (propq != NULL && (ctx->propq = OPENSSL_strdup(propq)) == NULL) {
 121         OPENSSL_free(ctx);
 122         ctx = NULL;
 123         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 124     }
 125     return ctx;
 126 }
 127
 128 static int ecdsa_signverify_init(void *vctx, void *ec, int operation)
 129 {
 130     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 131
 132     if (!ossl_prov_is_running()
 133             || ctx == NULL
 134             || ec == NULL
 135             || !EC_KEY_up_ref(ec))
 136         return 0;
 137     EC_KEY_free(ctx->ec);
 138     ctx->ec = ec;
 139     ctx->operation = operation;
 140     return ossl_ec_check_key(ec, operation == EVP_PKEY_OP_SIGN);
 141 }
 142
 143 static int ecdsa_sign_init(void *vctx, void *ec)
 144 {
 145     return ecdsa_signverify_init(vctx, ec, EVP_PKEY_OP_SIGN);
 146 }
 147
 148 static int ecdsa_verify_init(void *vctx, void *ec)
 149 {
 150     return ecdsa_signverify_init(vctx, ec, EVP_PKEY_OP_VERIFY);
 151 }
 152
 153 static int ecdsa_sign(void *vctx, unsigned char *sig, size_t *siglen,
 154                       size_t sigsize, const unsigned char *tbs, size_t tbslen)
 155 {
 156     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 157     int ret;
 158     unsigned int sltmp;
 159     size_t ecsize = ECDSA_size(ctx->ec);
 160
 161     if (!ossl_prov_is_running())
 162         return 0;
 163
 164     if (sig == NULL) {
 165         *siglen = ecsize;
 166         return 1;
 167     }
 168
 169 #if !defined(OPENSSL_NO_ACVP_TESTS)
 170     if (ctx->kattest && !ECDSA_sign_setup(ctx->ec, NULL, &ctx->kinv, &ctx->r))
 171         return 0;
 172 #endif
 173
 174     if (sigsize < (size_t)ecsize)
 175         return 0;
 176
 177     if (ctx->mdsize != 0 && tbslen != ctx->mdsize)
 178         return 0;
 179
 180     ret = ECDSA_sign_ex(0, tbs, tbslen, sig, &sltmp, ctx->kinv, ctx->r, ctx->ec);
 181     if (ret <= 0)
 182         return 0;
 183
 184     *siglen = sltmp;
 185     return 1;
 186 }
 187
 188 static int ecdsa_verify(void *vctx, const unsigned char *sig, size_t siglen,
 189                         const unsigned char *tbs, size_t tbslen)
 190 {
 191     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 192
 193     if (!ossl_prov_is_running() || (ctx->mdsize != 0 && tbslen != ctx->mdsize))
 194         return 0;
 195
 196     return ECDSA_verify(0, tbs, tbslen, sig, siglen, ctx->ec);
 197 }
 198
 199 static int ecdsa_setup_md(PROV_ECDSA_CTX *ctx, const char *mdname,
 200                           const char *mdprops)
 201 {
 202     EVP_MD *md = NULL;
 203     size_t mdname_len;
 204     int md_nid, sha1_allowed;
 205     WPACKET pkt;
 206
 207     if (mdname == NULL)
 208         return 1;
 209
 210     mdname_len = strlen(mdname);
 211     if (mdname_len >= sizeof(ctx->mdname)) {
 212         ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
 213                        "%s exceeds name buffer length", mdname);
 214         return 0;
 215     }
 216     if (mdprops == NULL)
 217         mdprops = ctx->propq;
 218     md = EVP_MD_fetch(ctx->libctx, mdname, mdprops);
 219     if (md == NULL) {
 220         ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
 221                        "%s could not be fetched", mdname);
 222         return 0;
 223     }
 224     sha1_allowed = (ctx->operation != EVP_PKEY_OP_SIGN);
 225     md_nid = ossl_digest_get_approved_nid_with_sha1(md, sha1_allowed);
 226     if (md_nid == NID_undef) {
 227         ERR_raise_data(ERR_LIB_PROV, PROV_R_DIGEST_NOT_ALLOWED,
 228                        "digest=%s", mdname);
 229         EVP_MD_free(md);
 230         return 0;
 231     }
 232
 233     EVP_MD_CTX_free(ctx->mdctx);
 234     EVP_MD_free(ctx->md);
 235
 236     ctx->aid_len = 0;
 237     if (WPACKET_init_der(&pkt, ctx->aid_buf, sizeof(ctx->aid_buf))
 238         && ossl_DER_w_algorithmIdentifier_ECDSA_with_MD(&pkt, -1, ctx->ec,
 239                                                         md_nid)
 240         && WPACKET_finish(&pkt)) {
 241         WPACKET_get_total_written(&pkt, &ctx->aid_len);
 242         ctx->aid = WPACKET_get_curr(&pkt);
 243     }
 244     WPACKET_cleanup(&pkt);
 245     ctx->mdctx = NULL;
 246     ctx->md = md;
 247     ctx->mdsize = EVP_MD_size(ctx->md);
 248     OPENSSL_strlcpy(ctx->mdname, mdname, sizeof(ctx->mdname));
 249
 250     return 1;
 251 }
 252
 253 static int ecdsa_digest_signverify_init(void *vctx, const char *mdname,
 254                                         void *ec, int operation)
 255 {
 256     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 257
 258     if (!ossl_prov_is_running())
 259         return 0;
 260
 261     ctx->flag_allow_md = 0;
 262     if (!ecdsa_signverify_init(vctx, ec, operation)
 263         || !ecdsa_setup_md(ctx, mdname, NULL))
 264         return 0;
 265
 266     ctx->mdctx = EVP_MD_CTX_new();
 267     if (ctx->mdctx == NULL)
 268         goto error;
 269
 270     if (!EVP_DigestInit_ex(ctx->mdctx, ctx->md, NULL))
 271         goto error;
 272     return 1;
 273 error:
 274     EVP_MD_CTX_free(ctx->mdctx);
 275     EVP_MD_free(ctx->md);
 276     ctx->mdctx = NULL;
 277     ctx->md = NULL;
 278     return 0;
 279 }
 280
 281 static int ecdsa_digest_sign_init(void *vctx, const char *mdname, void *ec)
 282 {
 283     return ecdsa_digest_signverify_init(vctx, mdname, ec, EVP_PKEY_OP_SIGN);
 284 }
 285
 286 static int ecdsa_digest_verify_init(void *vctx, const char *mdname, void *ec)
 287 {
 288     return ecdsa_digest_signverify_init(vctx, mdname, ec, EVP_PKEY_OP_VERIFY);
 289 }
 290
 291 int ecdsa_digest_signverify_update(void *vctx, const unsigned char *data,
 292                                    size_t datalen)
 293 {
 294     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 295
 296     if (ctx == NULL || ctx->mdctx == NULL)
 297         return 0;
 298
 299     return EVP_DigestUpdate(ctx->mdctx, data, datalen);
 300 }
 301
 302 int ecdsa_digest_sign_final(void *vctx, unsigned char *sig, size_t *siglen,
 303                             size_t sigsize)
 304 {
 305     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 306     unsigned char digest[EVP_MAX_MD_SIZE];
 307     unsigned int dlen = 0;
 308
 309     if (!ossl_prov_is_running() || ctx == NULL || ctx->mdctx == NULL)
 310         return 0;
 311
 312     /*
 313      * If sig is NULL then we're just finding out the sig size. Other fields
 314      * are ignored. Defer to ecdsa_sign.
 315      */
 316     if (sig != NULL
 317         && !EVP_DigestFinal_ex(ctx->mdctx, digest, &dlen))
 318         return 0;
 319     ctx->flag_allow_md = 1;
 320     return ecdsa_sign(vctx, sig, siglen, sigsize, digest, (size_t)dlen);
 321 }
 322
 323 int ecdsa_digest_verify_final(void *vctx, const unsigned char *sig,
 324                               size_t siglen)
 325 {
 326     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 327     unsigned char digest[EVP_MAX_MD_SIZE];
 328     unsigned int dlen = 0;
 329
 330     if (!ossl_prov_is_running() || ctx == NULL || ctx->mdctx == NULL)
 331         return 0;
 332
 333     if (!EVP_DigestFinal_ex(ctx->mdctx, digest, &dlen))
 334         return 0;
 335     ctx->flag_allow_md = 1;
 336     return ecdsa_verify(ctx, sig, siglen, digest, (size_t)dlen);
 337 }
 338
 339 static void ecdsa_freectx(void *vctx)
 340 {
 341     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 342
 343     OPENSSL_free(ctx->propq);
 344     EVP_MD_CTX_free(ctx->mdctx);
 345     EVP_MD_free(ctx->md);
 346     ctx->propq = NULL;
 347     ctx->mdctx = NULL;
 348     ctx->md = NULL;
 349     ctx->mdsize = 0;
 350     EC_KEY_free(ctx->ec);
 351     BN_clear_free(ctx->kinv);
 352     BN_clear_free(ctx->r);
 353     OPENSSL_free(ctx);
 354 }
 355
 356 static void *ecdsa_dupctx(void *vctx)
 357 {
 358     PROV_ECDSA_CTX *srcctx = (PROV_ECDSA_CTX *)vctx;
 359     PROV_ECDSA_CTX *dstctx;
 360
 361     if (!ossl_prov_is_running())
 362         return NULL;
 363
 364     dstctx = OPENSSL_zalloc(sizeof(*srcctx));
 365     if (dstctx == NULL)
 366         return NULL;
 367
 368     *dstctx = *srcctx;
 369     dstctx->ec = NULL;
 370     dstctx->md = NULL;
 371     dstctx->mdctx = NULL;
 372     dstctx->propq = NULL;
 373
 374     if (srcctx->ec != NULL && !EC_KEY_up_ref(srcctx->ec))
 375         goto err;
 376     /* Test KATS should not need to be supported */
 377     if (srcctx->kinv != NULL || srcctx->r != NULL)
 378         goto err;
 379     dstctx->ec = srcctx->ec;
 380
 381     if (srcctx->md != NULL && !EVP_MD_up_ref(srcctx->md))
 382         goto err;
 383     dstctx->md = srcctx->md;
 384
 385     if (srcctx->mdctx != NULL) {
 386         dstctx->mdctx = EVP_MD_CTX_new();
 387         if (dstctx->mdctx == NULL
 388                 || !EVP_MD_CTX_copy_ex(dstctx->mdctx, srcctx->mdctx))
 389             goto err;
 390     }
 391
 392     if (srcctx->propq != NULL) {
 393         dstctx->propq = OPENSSL_strdup(srcctx->propq);
 394         if (dstctx->propq == NULL)
 395             goto err;
 396     }
 397
 398     return dstctx;
 399  err:
 400     ecdsa_freectx(dstctx);
 401     return NULL;
 402 }
 403
 404 static int ecdsa_get_ctx_params(void *vctx, OSSL_PARAM *params)
 405 {
 406     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 407     OSSL_PARAM *p;
 408
 409     if (ctx == NULL || params == NULL)
 410         return 0;
 411
 412     p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID);
 413     if (p != NULL && !OSSL_PARAM_set_octet_string(p, ctx->aid, ctx->aid_len))
 414         return 0;
 415
 416     p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_DIGEST_SIZE);
 417     if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->mdsize))
 418         return 0;
 419
 420     p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_DIGEST);
 421     if (p != NULL && !OSSL_PARAM_set_utf8_string(p, ctx->md == NULL
 422                                                     ? ctx->mdname
 423                                                     : EVP_MD_name(ctx->md)))
 424         return 0;
 425
 426     return 1;
 427 }
 428
 429 static const OSSL_PARAM known_gettable_ctx_params[] = {
 430     OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0),
 431     OSSL_PARAM_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE, NULL),
 432     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
 433     OSSL_PARAM_END
 434 };
 435
 436 static const OSSL_PARAM *ecdsa_gettable_ctx_params(ossl_unused void *vctx,
 437                                                    ossl_unused void *provctx)
 438 {
 439     return known_gettable_ctx_params;
 440 }
 441
 442 static int ecdsa_set_ctx_params(void *vctx, const OSSL_PARAM params[])
 443 {
 444     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 445     const OSSL_PARAM *p;
 446
 447     if (ctx == NULL || params == NULL)
 448         return 0;
 449
 450 #if !defined(OPENSSL_NO_ACVP_TESTS)
 451     p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_KAT);
 452     if (p != NULL && !OSSL_PARAM_get_uint(p, &ctx->kattest))
 453         return 0;
 454 #endif
 455
 456     p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_DIGEST);
 457     /* Not allowed during certain operations */
 458     if (p != NULL && !ctx->flag_allow_md)
 459         return 0;
 460     if (p != NULL) {
 461         char mdname[OSSL_MAX_NAME_SIZE] = "", *pmdname = mdname;
 462         char mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmdprops = mdprops;
 463         const OSSL_PARAM *propsp =
 464             OSSL_PARAM_locate_const(params,
 465                                     OSSL_SIGNATURE_PARAM_PROPERTIES);
 466
 467         if (!OSSL_PARAM_get_utf8_string(p, &pmdname, sizeof(mdname)))
 468             return 0;
 469         if (propsp != NULL
 470             && !OSSL_PARAM_get_utf8_string(propsp, &pmdprops, sizeof(mdprops)))
 471             return 0;
 472         if (!ecdsa_setup_md(ctx, mdname, mdprops))
 473             return 0;
 474     }
 475
 476     p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_DIGEST_SIZE);
 477     if (p != NULL
 478         && (!ctx->flag_allow_md
 479             || !OSSL_PARAM_get_size_t(p, &ctx->mdsize)))
 480         return 0;
 481
 482     return 1;
 483 }
 484
 485 static const OSSL_PARAM settable_ctx_params[] = {
 486     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
 487     OSSL_PARAM_size_t(OSSL_SIGNATURE_PARAM_DIGEST_SIZE, NULL),
 488     OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PROPERTIES, NULL, 0),
 489     OSSL_PARAM_uint(OSSL_SIGNATURE_PARAM_KAT, NULL),
 490     OSSL_PARAM_END
 491 };
 492
 493 static const OSSL_PARAM settable_ctx_params_no_digest[] = {
 494     OSSL_PARAM_uint(OSSL_SIGNATURE_PARAM_KAT, NULL),
 495     OSSL_PARAM_END
 496 };
 497
 498 static const OSSL_PARAM *ecdsa_settable_ctx_params(void *vctx,
 499                                                    ossl_unused void *provctx)
 500 {
 501     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 502
 503     if (ctx != NULL && !ctx->flag_allow_md)
 504         return settable_ctx_params_no_digest;
 505     return settable_ctx_params;
 506 }
 507
 508 static int ecdsa_get_ctx_md_params(void *vctx, OSSL_PARAM *params)
 509 {
 510     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 511
 512     if (ctx->mdctx == NULL)
 513         return 0;
 514
 515     return EVP_MD_CTX_get_params(ctx->mdctx, params);
 516 }
 517
 518 static const OSSL_PARAM *ecdsa_gettable_ctx_md_params(void *vctx)
 519 {
 520     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 521
 522     if (ctx->md == NULL)
 523         return 0;
 524
 525     return EVP_MD_gettable_ctx_params(ctx->md);
 526 }
 527
 528 static int ecdsa_set_ctx_md_params(void *vctx, const OSSL_PARAM params[])
 529 {
 530     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 531
 532     if (ctx->mdctx == NULL)
 533         return 0;
 534
 535     return EVP_MD_CTX_set_params(ctx->mdctx, params);
 536 }
 537
 538 static const OSSL_PARAM *ecdsa_settable_ctx_md_params(void *vctx)
 539 {
 540     PROV_ECDSA_CTX *ctx = (PROV_ECDSA_CTX *)vctx;
 541
 542     if (ctx->md == NULL)
 543         return 0;
 544
 545     return EVP_MD_settable_ctx_params(ctx->md);
 546 }
 547
 548 const OSSL_DISPATCH ossl_ecdsa_signature_functions[] = {
 549     { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))ecdsa_newctx },
 550     { OSSL_FUNC_SIGNATURE_SIGN_INIT, (void (*)(void))ecdsa_sign_init },
 551     { OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))ecdsa_sign },
 552     { OSSL_FUNC_SIGNATURE_VERIFY_INIT, (void (*)(void))ecdsa_verify_init },
 553     { OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))ecdsa_verify },
 554     { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
 555       (void (*)(void))ecdsa_digest_sign_init },
 556     { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE,
 557       (void (*)(void))ecdsa_digest_signverify_update },
 558     { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL,
 559       (void (*)(void))ecdsa_digest_sign_final },
 560     { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
 561       (void (*)(void))ecdsa_digest_verify_init },
 562     { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE,
 563       (void (*)(void))ecdsa_digest_signverify_update },
 564     { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL,
 565       (void (*)(void))ecdsa_digest_verify_final },
 566     { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))ecdsa_freectx },
 567     { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))ecdsa_dupctx },
 568     { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))ecdsa_get_ctx_params },
 569     { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
 570       (void (*)(void))ecdsa_gettable_ctx_params },
 571     { OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))ecdsa_set_ctx_params },
 572     { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS,
 573       (void (*)(void))ecdsa_settable_ctx_params },
 574     { OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS,
 575       (void (*)(void))ecdsa_get_ctx_md_params },
 576     { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS,
 577       (void (*)(void))ecdsa_gettable_ctx_md_params },
 578     { OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS,
 579       (void (*)(void))ecdsa_set_ctx_md_params },
 580     { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS,
 581       (void (*)(void))ecdsa_settable_ctx_md_params },
 582     { 0, NULL }
 583 };