[thirdparty/openssl.git] / crypto / evp / signature.c

/*
 * Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <stdlib.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include "internal/cryptlib.h"
#include "crypto/evp.h"
#include "internal/provider.h"
#include "evp_local.h"

static EVP_SIGNATURE *evp_signature_new(OSSL_PROVIDER *prov)
{
    EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE));

    if (signature == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
        return NULL;
    }

    signature->lock = CRYPTO_THREAD_lock_new();
    if (signature->lock == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
        OPENSSL_free(signature);
        return NULL;
    }
    signature->prov = prov;
    ossl_provider_up_ref(prov);
    signature->refcnt = 1;

    return signature;
}

static void *evp_signature_from_dispatch(int name_id,
                                         const OSSL_DISPATCH *fns,
                                         OSSL_PROVIDER *prov)
{
    EVP_SIGNATURE *signature = NULL;
    int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
    int digsignfncnt = 0, digverifyfncnt = 0;
    int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0;

    if ((signature = evp_signature_new(prov)) == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    signature->name_id = name_id;

    for (; fns->function_id != 0; fns++) {
        switch (fns->function_id) {
        case OSSL_FUNC_SIGNATURE_NEWCTX:
            if (signature->newctx != NULL)
                break;
            signature->newctx = OSSL_get_OP_signature_newctx(fns);
            ctxfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SIGN_INIT:
            if (signature->sign_init != NULL)
                break;
            signature->sign_init = OSSL_get_OP_signature_sign_init(fns);
            signfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SIGN:
            if (signature->sign != NULL)
                break;
            signature->sign = OSSL_get_OP_signature_sign(fns);
            signfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
            if (signature->verify_init != NULL)
                break;
            signature->verify_init = OSSL_get_OP_signature_verify_init(fns);
            verifyfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_VERIFY:
            if (signature->verify != NULL)
                break;
            signature->verify = OSSL_get_OP_signature_verify(fns);
            verifyfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
            if (signature->verify_recover_init != NULL)
                break;
            signature->verify_recover_init
                = OSSL_get_OP_signature_verify_recover_init(fns);
            verifyrecfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
            if (signature->verify_recover != NULL)
                break;
            signature->verify_recover
                = OSSL_get_OP_signature_verify_recover(fns);
            verifyrecfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT:
            if (signature->digest_sign_init != NULL)
                break;
            signature->digest_sign_init
                = OSSL_get_OP_signature_digest_sign_init(fns);
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
            if (signature->digest_sign_update != NULL)
                break;
            signature->digest_sign_update
                = OSSL_get_OP_signature_digest_sign_update(fns);
            digsignfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
            if (signature->digest_sign_final != NULL)
                break;
            signature->digest_sign_final
                = OSSL_get_OP_signature_digest_sign_final(fns);
            digsignfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_SIGN:
            if (signature->digest_sign != NULL)
                break;
            signature->digest_sign
                = OSSL_get_OP_signature_digest_sign(fns);
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
            if (signature->digest_verify_init != NULL)
                break;
            signature->digest_verify_init
                = OSSL_get_OP_signature_digest_verify_init(fns);
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
            if (signature->digest_verify_update != NULL)
                break;
            signature->digest_verify_update
                = OSSL_get_OP_signature_digest_verify_update(fns);
            digverifyfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
            if (signature->digest_verify_final != NULL)
                break;
            signature->digest_verify_final
                = OSSL_get_OP_signature_digest_verify_final(fns);
            digverifyfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY:
            if (signature->digest_verify != NULL)
                break;
            signature->digest_verify
                = OSSL_get_OP_signature_digest_verify(fns);
            break;
        case OSSL_FUNC_SIGNATURE_FREECTX:
            if (signature->freectx != NULL)
                break;
            signature->freectx = OSSL_get_OP_signature_freectx(fns);
            ctxfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_DUPCTX:
            if (signature->dupctx != NULL)
                break;
            signature->dupctx = OSSL_get_OP_signature_dupctx(fns);
            break;
        case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
            if (signature->get_ctx_params != NULL)
                break;
            signature->get_ctx_params
                = OSSL_get_OP_signature_get_ctx_params(fns);
            gparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
            if (signature->gettable_ctx_params != NULL)
                break;
            signature->gettable_ctx_params
                = OSSL_get_OP_signature_gettable_ctx_params(fns);
            gparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
            if (signature->set_ctx_params != NULL)
                break;
            signature->set_ctx_params
                = OSSL_get_OP_signature_set_ctx_params(fns);
            sparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
            if (signature->settable_ctx_params != NULL)
                break;
            signature->settable_ctx_params
                = OSSL_get_OP_signature_settable_ctx_params(fns);
            sparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
            if (signature->get_ctx_md_params != NULL)
                break;
            signature->get_ctx_md_params
                = OSSL_get_OP_signature_get_ctx_md_params(fns);
            gmdparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
            if (signature->gettable_ctx_md_params != NULL)
                break;
            signature->gettable_ctx_md_params
                = OSSL_get_OP_signature_gettable_ctx_md_params(fns);
            gmdparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
            if (signature->set_ctx_md_params != NULL)
                break;
            signature->set_ctx_md_params
                = OSSL_get_OP_signature_set_ctx_md_params(fns);
            smdparamfncnt++;
            break;
        case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
            if (signature->settable_ctx_md_params != NULL)
                break;
            signature->settable_ctx_md_params
                = OSSL_get_OP_signature_settable_ctx_md_params(fns);
            smdparamfncnt++;
            break;
        }
    }
    if (ctxfncnt != 2
        || (signfncnt == 0
            && verifyfncnt == 0
            && verifyrecfncnt == 0
            && digsignfncnt == 0
            && digverifyfncnt == 0
            && signature->digest_sign == NULL
            && signature->digest_verify == NULL)
        || (signfncnt != 0 && signfncnt != 2)
        || (verifyfncnt != 0 && verifyfncnt != 2)
        || (verifyrecfncnt != 0 && verifyrecfncnt != 2)
        || (digsignfncnt != 0 && digsignfncnt != 2)
        || (digsignfncnt == 2 && signature->digest_sign_init == NULL)
        || (digverifyfncnt != 0 && digverifyfncnt != 2)
        || (digverifyfncnt == 2 && signature->digest_verify_init == NULL)
        || (signature->digest_sign != NULL
            && signature->digest_sign_init == NULL)
        || (signature->digest_verify != NULL
            && signature->digest_verify_init == NULL)
        || (gparamfncnt != 0 && gparamfncnt != 2)
        || (sparamfncnt != 0 && sparamfncnt != 2)
        || (gmdparamfncnt != 0 && gmdparamfncnt != 2)
        || (smdparamfncnt != 0 && smdparamfncnt != 2)) {
        /*
         * In order to be a consistent set of functions we must have at least
         * a set of context functions (newctx and freectx) as well as a set of
         * "signature" functions:
         *  (sign_init, sign) or
         *  (verify_init verify) or
         *  (verify_recover_init, verify_recover) or
         *  (digest_sign_init, digest_sign_update, digest_sign_final) or
         *  (digest_verify_init, digest_verify_update, digest_verify_final) or
         *  (digest_sign_init, digest_sign) or
         *  (digest_verify_init, digest_verify).
         *
         * set_ctx_params and settable_ctx_params are optional, but if one of
         * them is present then the other one must also be present. The same
         * applies to get_ctx_params and gettable_ctx_params. The same rules
         * apply to the "md_params" functions. The dupctx function is optional.
         */
        ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
        goto err;
    }

    return signature;
 err:
    EVP_SIGNATURE_free(signature);
    return NULL;
}

void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
{
    if (signature != NULL) {
        int i;

        CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
        if (i > 0)
            return;
        ossl_provider_free(signature->prov);
        CRYPTO_THREAD_lock_free(signature->lock);
        OPENSSL_free(signature);
    }
}

int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
{
    int ref = 0;

    CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
    return 1;
}

OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature)
{
    return signature->prov;
}

EVP_SIGNATURE *EVP_SIGNATURE_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                                   const char *properties)
{
    return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
                             evp_signature_from_dispatch,
                             (int (*)(void *))EVP_SIGNATURE_up_ref,
                             (void (*)(void *))EVP_SIGNATURE_free);
}

int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name)
{
    return evp_is_a(signature->prov, signature->name_id, NULL, name);
}

int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature)
{
    return signature->name_id;
}

void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx,
                                   void (*fn)(EVP_SIGNATURE *signature,
                                              void *arg),
                                   void *arg)
{
    evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
                       (void (*)(void *, void *))fn, arg,
                       evp_signature_from_dispatch,
                       (void (*)(void *))EVP_SIGNATURE_free);
}


void EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
                                void (*fn)(const char *name, void *data),
                                void *data)
{
    if (signature->prov != NULL)
        evp_names_do_all(signature->prov, signature->name_id, fn, data);
}

static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation)
{
    int ret = 0;
    void *provkey = NULL;
    EVP_SIGNATURE *signature = NULL;
    EVP_KEYMGMT *tmp_keymgmt = NULL;
    const char *supported_sig = NULL;

    if (ctx == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    evp_pkey_ctx_free_old_ops(ctx);
    ctx->operation = operation;

    /*
     * TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
     * calls can be removed.
     */
    ERR_set_mark();

    if (ctx->keymgmt == NULL)
        goto legacy;

    /*
     * Ensure that the key is provided, either natively, or as a cached export.
     *  If not, go legacy
     */
    tmp_keymgmt = ctx->keymgmt;
    provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
                                          &tmp_keymgmt, ctx->propquery);
    if (tmp_keymgmt == NULL)
        goto legacy;
    if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
        ERR_clear_last_mark();
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
        goto err;
    }
    EVP_KEYMGMT_free(ctx->keymgmt);
    ctx->keymgmt = tmp_keymgmt;

    if (ctx->keymgmt->query_operation_name != NULL)
        supported_sig = ctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);

    /*
     * If we didn't get a supported sig, assume there is one with the
     * same name as the key type.
     */
    if (supported_sig == NULL)
        supported_sig = ctx->keytype;

    /*
     * Because we cleared out old ops, we shouldn't need to worry about
     * checking if signature is already there.
     */
    signature =
        EVP_SIGNATURE_fetch(ctx->libctx, supported_sig, ctx->propquery);

    if (signature == NULL
        || (EVP_KEYMGMT_provider(ctx->keymgmt)
            != EVP_SIGNATURE_provider(signature))) {
        /*
         * We don't need to free ctx->keymgmt here, as it's not necessarily
         * tied to this operation.  It will be freed by EVP_PKEY_CTX_free().
         */
        EVP_SIGNATURE_free(signature);
        goto legacy;
    }

    /*
     * TODO remove this when legacy is gone
     * If we don't have the full support we need with provided methods,
     * let's go see if legacy does.
     */
    ERR_pop_to_mark();

    /* No more legacy from here down to legacy: */

    ctx->op.sig.signature = signature;
    ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov));
    if (ctx->op.sig.sigprovctx == NULL) {
        /* The provider key can stay in the cache */
        EVPerr(0, EVP_R_INITIALIZATION_ERROR);
        goto err;
    }

    switch (operation) {
    case EVP_PKEY_OP_SIGN:
        if (signature->sign_init == NULL) {
            EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
            ret = -2;
            goto err;
        }
        ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey);
        break;
    case EVP_PKEY_OP_VERIFY:
        if (signature->verify_init == NULL) {
            EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
            ret = -2;
            goto err;
        }
        ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey);
        break;
    case EVP_PKEY_OP_VERIFYRECOVER:
        if (signature->verify_recover_init == NULL) {
            EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
            ret = -2;
            goto err;
        }
        ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey);
        break;
    default:
        EVPerr(0, EVP_R_INITIALIZATION_ERROR);
        goto err;
    }

    if (ret <= 0) {
        signature->freectx(ctx->op.sig.sigprovctx);
        ctx->op.sig.sigprovctx = NULL;
        goto err;
    }
    return 1;

 legacy:
    /*
     * TODO remove this when legacy is gone
     * If we don't have the full support we need with provided methods,
     * let's go see if legacy does.
     */
    ERR_pop_to_mark();

    if (ctx->pmeth == NULL
            || (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
            || (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
            || (operation == EVP_PKEY_OP_VERIFYRECOVER
                && ctx->pmeth->verify_recover == NULL)) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    switch (operation) {
    case EVP_PKEY_OP_SIGN:
        if (ctx->pmeth->sign_init == NULL)
            return 1;
        ret = ctx->pmeth->sign_init(ctx);
        break;
    case EVP_PKEY_OP_VERIFY:
        if (ctx->pmeth->verify_init == NULL)
            return 1;
        ret = ctx->pmeth->verify_init(ctx);
        break;
    case EVP_PKEY_OP_VERIFYRECOVER:
        if (ctx->pmeth->verify_recover_init == NULL)
            return 1;
        ret = ctx->pmeth->verify_recover_init(ctx);
        break;
    default:
        EVPerr(0, EVP_R_INITIALIZATION_ERROR);
        goto err;
    }
    if (ret <= 0)
        goto err;
    return ret;

 err:
    ctx->operation = EVP_PKEY_OP_UNDEFINED;
    return ret;
}

int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
{
    return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN);
}

int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
                  unsigned char *sig, size_t *siglen,
                  const unsigned char *tbs, size_t tbslen)
{
    int ret;

    if (ctx == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    if (ctx->operation != EVP_PKEY_OP_SIGN) {
        EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
        return -1;
    }

    if (ctx->op.sig.sigprovctx == NULL)
        goto legacy;

    ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen,
                                      SIZE_MAX, tbs, tbslen);

    return ret;
 legacy:

    if (ctx->pmeth == NULL || ctx->pmeth->sign == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
        return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
}

int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
{
    return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY);
}

int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
                    const unsigned char *sig, size_t siglen,
                    const unsigned char *tbs, size_t tbslen)
{
    int ret;

    if (ctx == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    if (ctx->operation != EVP_PKEY_OP_VERIFY) {
        EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
        return -1;
    }

    if (ctx->op.sig.sigprovctx == NULL)
        goto legacy;

    ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen,
                                        tbs, tbslen);

    return ret;
 legacy:
    if (ctx->pmeth == NULL || ctx->pmeth->verify == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
}

int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
{
    return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER);
}

int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
                            unsigned char *rout, size_t *routlen,
                            const unsigned char *sig, size_t siglen)
{
    int ret;

    if (ctx == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
        EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
        return -1;
    }

    if (ctx->op.sig.sigprovctx == NULL)
        goto legacy;

    ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout,
                                                routlen,
                                                (rout == NULL ? 0 : *routlen),
                                                sig, siglen);
    return ret;
 legacy:
    if (ctx->pmeth == NULL || ctx->pmeth->verify_recover == NULL) {
        EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }
    M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
        return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
}
Commit	Line	Data
e683582b	1	/*
33388b44	2	* Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
e683582b SL	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/cryptlib.h"
	15	#include "crypto/evp.h"
	16	#include "internal/provider.h"
	17	#include "evp_local.h"
	18
	19	static EVP_SIGNATURE evp_signature_new(OSSL_PROVIDER prov)
	20	{
	21	EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE));
	22
	23	if (signature == NULL) {
	24	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	25	return NULL;
	26	}
	27
	28	signature->lock = CRYPTO_THREAD_lock_new();
	29	if (signature->lock == NULL) {
	30	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	31	OPENSSL_free(signature);
	32	return NULL;
	33	}
	34	signature->prov = prov;
	35	ossl_provider_up_ref(prov);
	36	signature->refcnt = 1;
	37
	38	return signature;
	39	}
	40
	41	static void *evp_signature_from_dispatch(int name_id,
	42	const OSSL_DISPATCH *fns,
	43	OSSL_PROVIDER *prov)
	44	{
	45	EVP_SIGNATURE *signature = NULL;
	46	int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
	47	int digsignfncnt = 0, digverifyfncnt = 0;
	48	int gparamfncnt = 0, sparamfncnt = 0, gmdparamfncnt = 0, smdparamfncnt = 0;
	49
	50	if ((signature = evp_signature_new(prov)) == NULL) {
	51	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	52	goto err;
	53	}
	54
	55	signature->name_id = name_id;
	56
	57	for (; fns->function_id != 0; fns++) {
	58	switch (fns->function_id) {
	59	case OSSL_FUNC_SIGNATURE_NEWCTX:
	60	if (signature->newctx != NULL)
	61	break;
	62	signature->newctx = OSSL_get_OP_signature_newctx(fns);
	63	ctxfncnt++;
	64	break;
	65	case OSSL_FUNC_SIGNATURE_SIGN_INIT:
	66	if (signature->sign_init != NULL)
67	break;
68	signature->sign_init = OSSL_get_OP_signature_sign_init(fns);
69	signfncnt++;
70	break;
71	case OSSL_FUNC_SIGNATURE_SIGN:
72	if (signature->sign != NULL)
73	break;
74	signature->sign = OSSL_get_OP_signature_sign(fns);
75	signfncnt++;
76	break;
77	case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
78	if (signature->verify_init != NULL)
79	break;
80	signature->verify_init = OSSL_get_OP_signature_verify_init(fns);
81	verifyfncnt++;
82	break;
83	case OSSL_FUNC_SIGNATURE_VERIFY:
84	if (signature->verify != NULL)
85	break;
86	signature->verify = OSSL_get_OP_signature_verify(fns);
87	verifyfncnt++;
88	break;
89	case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
90	if (signature->verify_recover_init != NULL)
91	break;
92	signature->verify_recover_init
93	= OSSL_get_OP_signature_verify_recover_init(fns);
94	verifyrecfncnt++;
95	break;
96	case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
97	if (signature->verify_recover != NULL)
98	break;
99	signature->verify_recover
100	= OSSL_get_OP_signature_verify_recover(fns);
101	verifyrecfncnt++;
102	break;
103	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT:
104	if (signature->digest_sign_init != NULL)
105	break;
106	signature->digest_sign_init
107	= OSSL_get_OP_signature_digest_sign_init(fns);
e683582b SL	108	break;
	109	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
	110	if (signature->digest_sign_update != NULL)
	111	break;
	112	signature->digest_sign_update
	113	= OSSL_get_OP_signature_digest_sign_update(fns);
	114	digsignfncnt++;
	115	break;
	116	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
	117	if (signature->digest_sign_final != NULL)
	118	break;
	119	signature->digest_sign_final
	120	= OSSL_get_OP_signature_digest_sign_final(fns);
	121	digsignfncnt++;
	122	break;
eea1e780 MC	123	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN:
	124	if (signature->digest_sign != NULL)
	125	break;
	126	signature->digest_sign
	127	= OSSL_get_OP_signature_digest_sign(fns);
	128	break;
e683582b SL	129	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
	130	if (signature->digest_verify_init != NULL)
	131	break;
	132	signature->digest_verify_init
	133	= OSSL_get_OP_signature_digest_verify_init(fns);
e683582b SL	134	break;
	135	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
	136	if (signature->digest_verify_update != NULL)
	137	break;
	138	signature->digest_verify_update
	139	= OSSL_get_OP_signature_digest_verify_update(fns);
	140	digverifyfncnt++;
	141	break;
	142	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
	143	if (signature->digest_verify_final != NULL)
	144	break;
	145	signature->digest_verify_final
	146	= OSSL_get_OP_signature_digest_verify_final(fns);
	147	digverifyfncnt++;
	148	break;
eea1e780 MC	149	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY:
	150	if (signature->digest_verify != NULL)
	151	break;
	152	signature->digest_verify
	153	= OSSL_get_OP_signature_digest_verify(fns);
	154	break;
e683582b SL	155	case OSSL_FUNC_SIGNATURE_FREECTX:
	156	if (signature->freectx != NULL)
	157	break;
	158	signature->freectx = OSSL_get_OP_signature_freectx(fns);
	159	ctxfncnt++;
	160	break;
	161	case OSSL_FUNC_SIGNATURE_DUPCTX:
	162	if (signature->dupctx != NULL)
	163	break;
	164	signature->dupctx = OSSL_get_OP_signature_dupctx(fns);
	165	break;
	166	case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
	167	if (signature->get_ctx_params != NULL)
	168	break;
	169	signature->get_ctx_params
	170	= OSSL_get_OP_signature_get_ctx_params(fns);
	171	gparamfncnt++;
	172	break;
	173	case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
	174	if (signature->gettable_ctx_params != NULL)
	175	break;
	176	signature->gettable_ctx_params
	177	= OSSL_get_OP_signature_gettable_ctx_params(fns);
	178	gparamfncnt++;
	179	break;
	180	case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
	181	if (signature->set_ctx_params != NULL)
	182	break;
	183	signature->set_ctx_params
	184	= OSSL_get_OP_signature_set_ctx_params(fns);
	185	sparamfncnt++;
	186	break;
	187	case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
	188	if (signature->settable_ctx_params != NULL)
	189	break;
	190	signature->settable_ctx_params
	191	= OSSL_get_OP_signature_settable_ctx_params(fns);
	192	sparamfncnt++;
	193	break;
	194	case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
	195	if (signature->get_ctx_md_params != NULL)
	196	break;
	197	signature->get_ctx_md_params
	198	= OSSL_get_OP_signature_get_ctx_md_params(fns);
	199	gmdparamfncnt++;
	200	break;
	201	case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
	202	if (signature->gettable_ctx_md_params != NULL)
	203	break;
	204	signature->gettable_ctx_md_params
	205	= OSSL_get_OP_signature_gettable_ctx_md_params(fns);
	206	gmdparamfncnt++;
	207	break;
	208	case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
	209	if (signature->set_ctx_md_params != NULL)
	210	break;
	211	signature->set_ctx_md_params
	212	= OSSL_get_OP_signature_set_ctx_md_params(fns);
	213	smdparamfncnt++;
	214	break;
	215	case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
	216	if (signature->settable_ctx_md_params != NULL)
	217	break;
	218	signature->settable_ctx_md_params
219	= OSSL_get_OP_signature_settable_ctx_md_params(fns);
220	smdparamfncnt++;
221	break;
222	}
223	}
224	if (ctxfncnt != 2
225	\|\| (signfncnt == 0
226	&& verifyfncnt == 0
227	&& verifyrecfncnt == 0
228	&& digsignfncnt == 0
eea1e780 MC	229	&& digverifyfncnt == 0
	230	&& signature->digest_sign == NULL
	231	&& signature->digest_verify == NULL)
e683582b SL	232	\|\| (signfncnt != 0 && signfncnt != 2)
	233	\|\| (verifyfncnt != 0 && verifyfncnt != 2)
	234	\|\| (verifyrecfncnt != 0 && verifyrecfncnt != 2)
eea1e780 MC	235	\|\| (digsignfncnt != 0 && digsignfncnt != 2)
	236	\|\| (digsignfncnt == 2 && signature->digest_sign_init == NULL)
	237	\|\| (digverifyfncnt != 0 && digverifyfncnt != 2)
	238	\|\| (digverifyfncnt == 2 && signature->digest_verify_init == NULL)
	239	\|\| (signature->digest_sign != NULL
	240	&& signature->digest_sign_init == NULL)
	241	\|\| (signature->digest_verify != NULL
	242	&& signature->digest_verify_init == NULL)
e683582b SL	243	\|\| (gparamfncnt != 0 && gparamfncnt != 2)
	244	\|\| (sparamfncnt != 0 && sparamfncnt != 2)
	245	\|\| (gmdparamfncnt != 0 && gmdparamfncnt != 2)
	246	\|\| (smdparamfncnt != 0 && smdparamfncnt != 2)) {
	247	/*
	248	* In order to be a consistent set of functions we must have at least
	249	* a set of context functions (newctx and freectx) as well as a set of
	250	* "signature" functions:
	251	* (sign_init, sign) or
	252	* (verify_init verify) or
	253	* (verify_recover_init, verify_recover) or
	254	* (digest_sign_init, digest_sign_update, digest_sign_final) or
eea1e780 MC	255	* (digest_verify_init, digest_verify_update, digest_verify_final) or
	256	* (digest_sign_init, digest_sign) or
	257	* (digest_verify_init, digest_verify).
e683582b SL	258	*
	259	* set_ctx_params and settable_ctx_params are optional, but if one of
	260	* them is present then the other one must also be present. The same
	261	* applies to get_ctx_params and gettable_ctx_params. The same rules
	262	* apply to the "md_params" functions. The dupctx function is optional.
	263	*/
	264	ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
	265	goto err;
	266	}
	267
	268	return signature;
	269	err:
	270	EVP_SIGNATURE_free(signature);
	271	return NULL;
	272	}
	273
	274	void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
	275	{
	276	if (signature != NULL) {
	277	int i;
	278
	279	CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
	280	if (i > 0)
	281	return;
	282	ossl_provider_free(signature->prov);
	283	CRYPTO_THREAD_lock_free(signature->lock);
	284	OPENSSL_free(signature);
	285	}
	286	}
	287
	288	int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
	289	{
	290	int ref = 0;
	291
	292	CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
	293	return 1;
	294	}
	295
	296	OSSL_PROVIDER EVP_SIGNATURE_provider(const EVP_SIGNATURE signature)
	297	{
	298	return signature->prov;
	299	}
	300
	301	EVP_SIGNATURE EVP_SIGNATURE_fetch(OPENSSL_CTX ctx, const char *algorithm,
	302	const char *properties)
	303	{
	304	return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
	305	evp_signature_from_dispatch,
	306	(int ()(void ))EVP_SIGNATURE_up_ref,
	307	(void ()(void ))EVP_SIGNATURE_free);
	308	}
	309
	310	int EVP_SIGNATURE_is_a(const EVP_SIGNATURE signature, const char name)
	311	{
e4a1d023	312	return evp_is_a(signature->prov, signature->name_id, NULL, name);
e683582b SL	313	}
	314
	315	int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature)
	316	{
	317	return signature->name_id;
	318	}
	319
	320	void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx,
	321	void (fn)(EVP_SIGNATURE signature,
	322	void *arg),
	323	void *arg)
	324	{
	325	evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
	326	(void ()(void , void *))fn, arg,
	327	evp_signature_from_dispatch,
	328	(void ()(void ))EVP_SIGNATURE_free);
	329	}
	330
	331
	332	void EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
	333	void (fn)(const char name, void *data),
	334	void *data)
	335	{
	336	if (signature->prov != NULL)
	337	evp_names_do_all(signature->prov, signature->name_id, fn, data);
	338	}
	339
	340	static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation)
	341	{
	342	int ret = 0;
	343	void *provkey = NULL;
	344	EVP_SIGNATURE *signature = NULL;
f6aa5774 RL	345	EVP_KEYMGMT *tmp_keymgmt = NULL;
f6aa5774 RL	346	const char *supported_sig = NULL;
e683582b SL	347
	348	if (ctx == NULL) {
	349	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	350	return -2;
	351	}
	352
	353	evp_pkey_ctx_free_old_ops(ctx);
	354	ctx->operation = operation;
	355
0b9dd384 RL	356	/*
	357	* TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
	358	* calls can be removed.
	359	*/
	360	ERR_set_mark();
	361
4b9e90f4	362	if (ctx->keymgmt == NULL)
e683582b SL	363	goto legacy;
e683582b SL	364
3c6ed955 RL	365	/*
	366	* Ensure that the key is provided, either natively, or as a cached export.
	367	* If not, go legacy
	368	*/
f6aa5774	369	tmp_keymgmt = ctx->keymgmt;
3c6ed955 RL	370	provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
3c6ed955 RL	371	&tmp_keymgmt, ctx->propquery);
d0ddf9b4	372	if (tmp_keymgmt == NULL)
f6aa5774 RL	373	goto legacy;
f6aa5774 RL	374	if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
0b9dd384	375	ERR_clear_last_mark();
f6aa5774 RL	376	ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
f6aa5774 RL	377	goto err;
e683582b	378	}
f6aa5774 RL	379	EVP_KEYMGMT_free(ctx->keymgmt);
	380	ctx->keymgmt = tmp_keymgmt;
	381
	382	if (ctx->keymgmt->query_operation_name != NULL)
	383	supported_sig = ctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
	384
	385	/*
	386	* If we didn't get a supported sig, assume there is one with the
	387	* same name as the key type.
	388	*/
	389	if (supported_sig == NULL)
	390	supported_sig = ctx->keytype;
	391
	392	/*
	393	* Because we cleared out old ops, we shouldn't need to worry about
	394	* checking if signature is already there.
	395	*/
	396	signature =
	397	EVP_SIGNATURE_fetch(ctx->libctx, supported_sig, ctx->propquery);
	398
	399	if (signature == NULL
e683582b SL	400	\|\| (EVP_KEYMGMT_provider(ctx->keymgmt)
	401	!= EVP_SIGNATURE_provider(signature))) {
	402	/*
0b9dd384 RL	403	* We don't need to free ctx->keymgmt here, as it's not necessarily
0b9dd384 RL	404	* tied to this operation. It will be freed by EVP_PKEY_CTX_free().
e683582b SL	405	*/
	406	EVP_SIGNATURE_free(signature);
	407	goto legacy;
	408	}
	409
0b9dd384 RL	410	/*
	411	* TODO remove this when legacy is gone
	412	* If we don't have the full support we need with provided methods,
	413	* let's go see if legacy does.
	414	*/
	415	ERR_pop_to_mark();
	416
	417	/* No more legacy from here down to legacy: */
	418
e683582b	419	ctx->op.sig.signature = signature;
e683582b SL	420	ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov));
	421	if (ctx->op.sig.sigprovctx == NULL) {
	422	/* The provider key can stay in the cache */
	423	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	424	goto err;
	425	}
	426
	427	switch (operation) {
	428	case EVP_PKEY_OP_SIGN:
	429	if (signature->sign_init == NULL) {
	430	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	431	ret = -2;
	432	goto err;
	433	}
	434	ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey);
	435	break;
	436	case EVP_PKEY_OP_VERIFY:
	437	if (signature->verify_init == NULL) {
	438	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	439	ret = -2;
	440	goto err;
	441	}
	442	ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey);
	443	break;
	444	case EVP_PKEY_OP_VERIFYRECOVER:
	445	if (signature->verify_recover_init == NULL) {
	446	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	447	ret = -2;
	448	goto err;
	449	}
	450	ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey);
	451	break;
	452	default:
	453	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	454	goto err;
	455	}
	456
	457	if (ret <= 0) {
	458	signature->freectx(ctx->op.sig.sigprovctx);
	459	ctx->op.sig.sigprovctx = NULL;
	460	goto err;
	461	}
	462	return 1;
	463
	464	legacy:
0b9dd384 RL	465	/*
	466	* TODO remove this when legacy is gone
	467	* If we don't have the full support we need with provided methods,
	468	* let's go see if legacy does.
	469	*/
	470	ERR_pop_to_mark();
	471
e683582b SL	472	if (ctx->pmeth == NULL
	473	\|\| (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
	474	\|\| (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
	475	\|\| (operation == EVP_PKEY_OP_VERIFYRECOVER
	476	&& ctx->pmeth->verify_recover == NULL)) {
	477	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	478	return -2;
	479	}
	480
	481	switch (operation) {
	482	case EVP_PKEY_OP_SIGN:
	483	if (ctx->pmeth->sign_init == NULL)
	484	return 1;
	485	ret = ctx->pmeth->sign_init(ctx);
	486	break;
	487	case EVP_PKEY_OP_VERIFY:
	488	if (ctx->pmeth->verify_init == NULL)
	489	return 1;
	490	ret = ctx->pmeth->verify_init(ctx);
	491	break;
	492	case EVP_PKEY_OP_VERIFYRECOVER:
	493	if (ctx->pmeth->verify_recover_init == NULL)
	494	return 1;
	495	ret = ctx->pmeth->verify_recover_init(ctx);
	496	break;
	497	default:
	498	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	499	goto err;
	500	}
	501	if (ret <= 0)
	502	goto err;
	503	return ret;
	504
	505	err:
	506	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	507	return ret;
	508	}
	509
	510	int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
	511	{
	512	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN);
	513	}
	514
	515	int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
	516	unsigned char sig, size_t siglen,
	517	const unsigned char *tbs, size_t tbslen)
	518	{
	519	int ret;
	520
	521	if (ctx == NULL) {
	522	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	523	return -2;
	524	}
	525
	526	if (ctx->operation != EVP_PKEY_OP_SIGN) {
	527	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
	528	return -1;
	529	}
	530
	531	if (ctx->op.sig.sigprovctx == NULL)
	532	goto legacy;
	533
	534	ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen,
	535	SIZE_MAX, tbs, tbslen);
536
537	return ret;
538	legacy:
539
540	if (ctx->pmeth == NULL \|\| ctx->pmeth->sign == NULL) {
541	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
542	return -2;
543	}
544
545	M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
546	return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
547	}
548
549	int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
550	{
551	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY);
552	}
553
554	int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
555	const unsigned char *sig, size_t siglen,
556	const unsigned char *tbs, size_t tbslen)
557	{
558	int ret;
559
560	if (ctx == NULL) {
561	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
562	return -2;
563	}
564
565	if (ctx->operation != EVP_PKEY_OP_VERIFY) {
566	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
567	return -1;
568	}
569
570	if (ctx->op.sig.sigprovctx == NULL)
571	goto legacy;
572
573	ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen,
574	tbs, tbslen);
575
576	return ret;
577	legacy:
578	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify == NULL) {
579	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
580	return -2;
581	}
582
583	return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
584	}
585
586	int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
587	{
588	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER);
589	}
590
591	int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
592	unsigned char rout, size_t routlen,
593	const unsigned char *sig, size_t siglen)
594	{
595	int ret;
596
597	if (ctx == NULL) {
598	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
599	return -2;
600	}
601
602	if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
603	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
604	return -1;
605	}
606
607	if (ctx->op.sig.sigprovctx == NULL)
608	goto legacy;
609
610	ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout,
611	routlen,
612	(rout == NULL ? 0 : *routlen),
613	sig, siglen);
614	return ret;
615	legacy:
616	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify_recover == NULL) {
617	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
618	return -2;
619	}
620	M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
621	return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
622	}