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

/*
 * Copyright 2006-2016 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);
            digsignfncnt++;
            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_VERIFY_INIT:
            if (signature->digest_verify_init != NULL)
                break;
            signature->digest_verify_init
                = OSSL_get_OP_signature_digest_verify_init(fns);
            digverifyfncnt++;
            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_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)
        || (signfncnt != 0 && signfncnt != 2)
        || (verifyfncnt != 0 && verifyfncnt != 2)
        || (verifyrecfncnt != 0 && verifyrecfncnt != 2)
        || (digsignfncnt != 0 && digsignfncnt != 3)
        || (digverifyfncnt != 0 && digverifyfncnt != 3)
        || (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).
         *
         * 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->keytype == NULL)
        goto legacy;

    /* Ensure that the key is provided.  If not, go legacy */
    tmp_keymgmt = ctx->keymgmt;
    provkey = evp_pkey_make_provided(ctx->pkey, ctx->libctx,
                                     &tmp_keymgmt, ctx->propquery);
    if (provkey == 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 SL	1	/*
	2	* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <openssl/objects.h>
	13	#include <openssl/evp.h>
	14	#include "internal/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);
108	digsignfncnt++;
109	break;
110	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE:
111	if (signature->digest_sign_update != NULL)
112	break;
113	signature->digest_sign_update
114	= OSSL_get_OP_signature_digest_sign_update(fns);
115	digsignfncnt++;
116	break;
117	case OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL:
118	if (signature->digest_sign_final != NULL)
119	break;
120	signature->digest_sign_final
121	= OSSL_get_OP_signature_digest_sign_final(fns);
122	digsignfncnt++;
123	break;
124	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT:
125	if (signature->digest_verify_init != NULL)
126	break;
127	signature->digest_verify_init
128	= OSSL_get_OP_signature_digest_verify_init(fns);
129	digverifyfncnt++;
130	break;
131	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE:
132	if (signature->digest_verify_update != NULL)
133	break;
134	signature->digest_verify_update
135	= OSSL_get_OP_signature_digest_verify_update(fns);
136	digverifyfncnt++;
137	break;
138	case OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL:
139	if (signature->digest_verify_final != NULL)
140	break;
141	signature->digest_verify_final
142	= OSSL_get_OP_signature_digest_verify_final(fns);
143	digverifyfncnt++;
144	break;
145	case OSSL_FUNC_SIGNATURE_FREECTX:
146	if (signature->freectx != NULL)
147	break;
148	signature->freectx = OSSL_get_OP_signature_freectx(fns);
149	ctxfncnt++;
150	break;
151	case OSSL_FUNC_SIGNATURE_DUPCTX:
152	if (signature->dupctx != NULL)
153	break;
154	signature->dupctx = OSSL_get_OP_signature_dupctx(fns);
155	break;
156	case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
157	if (signature->get_ctx_params != NULL)
158	break;
159	signature->get_ctx_params
160	= OSSL_get_OP_signature_get_ctx_params(fns);
161	gparamfncnt++;
162	break;
163	case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
164	if (signature->gettable_ctx_params != NULL)
165	break;
166	signature->gettable_ctx_params
167	= OSSL_get_OP_signature_gettable_ctx_params(fns);
168	gparamfncnt++;
169	break;
170	case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
171	if (signature->set_ctx_params != NULL)
172	break;
173	signature->set_ctx_params
174	= OSSL_get_OP_signature_set_ctx_params(fns);
175	sparamfncnt++;
176	break;
177	case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
178	if (signature->settable_ctx_params != NULL)
179	break;
180	signature->settable_ctx_params
181	= OSSL_get_OP_signature_settable_ctx_params(fns);
182	sparamfncnt++;
183	break;
184	case OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS:
185	if (signature->get_ctx_md_params != NULL)
186	break;
187	signature->get_ctx_md_params
188	= OSSL_get_OP_signature_get_ctx_md_params(fns);
189	gmdparamfncnt++;
190	break;
191	case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS:
192	if (signature->gettable_ctx_md_params != NULL)
193	break;
194	signature->gettable_ctx_md_params
195	= OSSL_get_OP_signature_gettable_ctx_md_params(fns);
196	gmdparamfncnt++;
197	break;
198	case OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS:
199	if (signature->set_ctx_md_params != NULL)
200	break;
201	signature->set_ctx_md_params
202	= OSSL_get_OP_signature_set_ctx_md_params(fns);
203	smdparamfncnt++;
204	break;
205	case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS:
206	if (signature->settable_ctx_md_params != NULL)
207	break;
208	signature->settable_ctx_md_params
209	= OSSL_get_OP_signature_settable_ctx_md_params(fns);
210	smdparamfncnt++;
211	break;
212	}
213	}
214	if (ctxfncnt != 2
215	\|\| (signfncnt == 0
216	&& verifyfncnt == 0
217	&& verifyrecfncnt == 0
218	&& digsignfncnt == 0
219	&& digverifyfncnt == 0)
220	\|\| (signfncnt != 0 && signfncnt != 2)
221	\|\| (verifyfncnt != 0 && verifyfncnt != 2)
222	\|\| (verifyrecfncnt != 0 && verifyrecfncnt != 2)
223	\|\| (digsignfncnt != 0 && digsignfncnt != 3)
224	\|\| (digverifyfncnt != 0 && digverifyfncnt != 3)
225	\|\| (gparamfncnt != 0 && gparamfncnt != 2)
226	\|\| (sparamfncnt != 0 && sparamfncnt != 2)
227	\|\| (gmdparamfncnt != 0 && gmdparamfncnt != 2)
228	\|\| (smdparamfncnt != 0 && smdparamfncnt != 2)) {
229	/*
230	* In order to be a consistent set of functions we must have at least
231	* a set of context functions (newctx and freectx) as well as a set of
232	* "signature" functions:
233	* (sign_init, sign) or
234	* (verify_init verify) or
235	* (verify_recover_init, verify_recover) or
236	* (digest_sign_init, digest_sign_update, digest_sign_final) or
237	* (digest_verify_init, digest_verify_update, digest_verify_final).
238	*
239	* set_ctx_params and settable_ctx_params are optional, but if one of
240	* them is present then the other one must also be present. The same
241	* applies to get_ctx_params and gettable_ctx_params. The same rules
242	* apply to the "md_params" functions. The dupctx function is optional.
243	*/
244	ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
245	goto err;
246	}
247
248	return signature;
249	err:
250	EVP_SIGNATURE_free(signature);
251	return NULL;
252	}
253
254	void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
255	{
256	if (signature != NULL) {
257	int i;
258
259	CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
260	if (i > 0)
261	return;
262	ossl_provider_free(signature->prov);
263	CRYPTO_THREAD_lock_free(signature->lock);
264	OPENSSL_free(signature);
265	}
266	}
267
268	int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
269	{
270	int ref = 0;
271
272	CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
273	return 1;
274	}
275
276	OSSL_PROVIDER EVP_SIGNATURE_provider(const EVP_SIGNATURE signature)
277	{
278	return signature->prov;
279	}
280
281	EVP_SIGNATURE EVP_SIGNATURE_fetch(OPENSSL_CTX ctx, const char *algorithm,
282	const char *properties)
283	{
284	return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
285	evp_signature_from_dispatch,
286	(int ()(void ))EVP_SIGNATURE_up_ref,
287	(void ()(void ))EVP_SIGNATURE_free);
288	}
289
290	int EVP_SIGNATURE_is_a(const EVP_SIGNATURE signature, const char name)
291	{
e4a1d023	292	return evp_is_a(signature->prov, signature->name_id, NULL, name);
e683582b SL	293	}
	294
	295	int EVP_SIGNATURE_number(const EVP_SIGNATURE *signature)
	296	{
	297	return signature->name_id;
	298	}
	299
	300	void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx,
	301	void (fn)(EVP_SIGNATURE signature,
	302	void *arg),
	303	void *arg)
	304	{
	305	evp_generic_do_all(libctx, OSSL_OP_SIGNATURE,
	306	(void ()(void , void *))fn, arg,
	307	evp_signature_from_dispatch,
	308	(void ()(void ))EVP_SIGNATURE_free);
	309	}
	310
	311
	312	void EVP_SIGNATURE_names_do_all(const EVP_SIGNATURE *signature,
	313	void (fn)(const char name, void *data),
	314	void *data)
	315	{
	316	if (signature->prov != NULL)
	317	evp_names_do_all(signature->prov, signature->name_id, fn, data);
	318	}
	319
	320	static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, int operation)
	321	{
	322	int ret = 0;
	323	void *provkey = NULL;
	324	EVP_SIGNATURE *signature = NULL;
f6aa5774 RL	325	EVP_KEYMGMT *tmp_keymgmt = NULL;
f6aa5774 RL	326	const char *supported_sig = NULL;
e683582b SL	327
	328	if (ctx == NULL) {
	329	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	330	return -2;
	331	}
	332
	333	evp_pkey_ctx_free_old_ops(ctx);
	334	ctx->operation = operation;
	335
0b9dd384 RL	336	/*
	337	* TODO when we stop falling back to legacy, this and the ERR_pop_to_mark()
	338	* calls can be removed.
	339	*/
	340	ERR_set_mark();
	341
e683582b SL	342	if (ctx->keytype == NULL)
	343	goto legacy;
	344
f6aa5774 RL	345	/* Ensure that the key is provided. If not, go legacy */
	346	tmp_keymgmt = ctx->keymgmt;
	347	provkey = evp_pkey_make_provided(ctx->pkey, ctx->libctx,
b305452f	348	&tmp_keymgmt, ctx->propquery);
f6aa5774 RL	349	if (provkey == NULL)
	350	goto legacy;
	351	if (!EVP_KEYMGMT_up_ref(tmp_keymgmt)) {
0b9dd384	352	ERR_clear_last_mark();
f6aa5774 RL	353	ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
f6aa5774 RL	354	goto err;
e683582b	355	}
f6aa5774 RL	356	EVP_KEYMGMT_free(ctx->keymgmt);
	357	ctx->keymgmt = tmp_keymgmt;
	358
	359	if (ctx->keymgmt->query_operation_name != NULL)
	360	supported_sig = ctx->keymgmt->query_operation_name(OSSL_OP_SIGNATURE);
	361
	362	/*
	363	* If we didn't get a supported sig, assume there is one with the
	364	* same name as the key type.
	365	*/
	366	if (supported_sig == NULL)
	367	supported_sig = ctx->keytype;
	368
	369	/*
	370	* Because we cleared out old ops, we shouldn't need to worry about
	371	* checking if signature is already there.
	372	*/
	373	signature =
	374	EVP_SIGNATURE_fetch(ctx->libctx, supported_sig, ctx->propquery);
	375
	376	if (signature == NULL
e683582b SL	377	\|\| (EVP_KEYMGMT_provider(ctx->keymgmt)
	378	!= EVP_SIGNATURE_provider(signature))) {
	379	/*
0b9dd384 RL	380	* We don't need to free ctx->keymgmt here, as it's not necessarily
0b9dd384 RL	381	* tied to this operation. It will be freed by EVP_PKEY_CTX_free().
e683582b SL	382	*/
	383	EVP_SIGNATURE_free(signature);
	384	goto legacy;
	385	}
	386
0b9dd384 RL	387	/*
	388	* TODO remove this when legacy is gone
	389	* If we don't have the full support we need with provided methods,
	390	* let's go see if legacy does.
	391	*/
	392	ERR_pop_to_mark();
	393
	394	/* No more legacy from here down to legacy: */
	395
e683582b	396	ctx->op.sig.signature = signature;
e683582b SL	397	ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov));
	398	if (ctx->op.sig.sigprovctx == NULL) {
	399	/* The provider key can stay in the cache */
	400	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	401	goto err;
	402	}
	403
	404	switch (operation) {
	405	case EVP_PKEY_OP_SIGN:
	406	if (signature->sign_init == NULL) {
	407	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	408	ret = -2;
	409	goto err;
	410	}
	411	ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey);
	412	break;
	413	case EVP_PKEY_OP_VERIFY:
	414	if (signature->verify_init == NULL) {
	415	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	416	ret = -2;
	417	goto err;
	418	}
	419	ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey);
	420	break;
	421	case EVP_PKEY_OP_VERIFYRECOVER:
	422	if (signature->verify_recover_init == NULL) {
	423	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	424	ret = -2;
	425	goto err;
	426	}
	427	ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey);
	428	break;
	429	default:
	430	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	431	goto err;
	432	}
	433
	434	if (ret <= 0) {
	435	signature->freectx(ctx->op.sig.sigprovctx);
	436	ctx->op.sig.sigprovctx = NULL;
	437	goto err;
	438	}
	439	return 1;
	440
	441	legacy:
0b9dd384 RL	442	/*
	443	* TODO remove this when legacy is gone
	444	* If we don't have the full support we need with provided methods,
	445	* let's go see if legacy does.
	446	*/
	447	ERR_pop_to_mark();
	448
e683582b SL	449	if (ctx->pmeth == NULL
	450	\|\| (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
	451	\|\| (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
	452	\|\| (operation == EVP_PKEY_OP_VERIFYRECOVER
	453	&& ctx->pmeth->verify_recover == NULL)) {
	454	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	455	return -2;
	456	}
	457
	458	switch (operation) {
	459	case EVP_PKEY_OP_SIGN:
	460	if (ctx->pmeth->sign_init == NULL)
	461	return 1;
	462	ret = ctx->pmeth->sign_init(ctx);
	463	break;
	464	case EVP_PKEY_OP_VERIFY:
	465	if (ctx->pmeth->verify_init == NULL)
	466	return 1;
	467	ret = ctx->pmeth->verify_init(ctx);
	468	break;
	469	case EVP_PKEY_OP_VERIFYRECOVER:
	470	if (ctx->pmeth->verify_recover_init == NULL)
	471	return 1;
	472	ret = ctx->pmeth->verify_recover_init(ctx);
	473	break;
	474	default:
	475	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	476	goto err;
	477	}
	478	if (ret <= 0)
	479	goto err;
	480	return ret;
	481
	482	err:
	483	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	484	return ret;
	485	}
	486
	487	int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
	488	{
	489	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_SIGN);
	490	}
	491
	492	int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
	493	unsigned char sig, size_t siglen,
	494	const unsigned char *tbs, size_t tbslen)
	495	{
	496	int ret;
	497
	498	if (ctx == NULL) {
	499	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	500	return -2;
	501	}
	502
	503	if (ctx->operation != EVP_PKEY_OP_SIGN) {
	504	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
	505	return -1;
	506	}
	507
	508	if (ctx->op.sig.sigprovctx == NULL)
	509	goto legacy;
	510
	511	ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen,
	512	SIZE_MAX, tbs, tbslen);
513
514	return ret;
515	legacy:
516
517	if (ctx->pmeth == NULL \|\| ctx->pmeth->sign == NULL) {
518	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
519	return -2;
520	}
521
522	M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
523	return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
524	}
525
526	int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
527	{
528	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFY);
529	}
530
531	int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
532	const unsigned char *sig, size_t siglen,
533	const unsigned char *tbs, size_t tbslen)
534	{
535	int ret;
536
537	if (ctx == NULL) {
538	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
539	return -2;
540	}
541
542	if (ctx->operation != EVP_PKEY_OP_VERIFY) {
543	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
544	return -1;
545	}
546
547	if (ctx->op.sig.sigprovctx == NULL)
548	goto legacy;
549
550	ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen,
551	tbs, tbslen);
552
553	return ret;
554	legacy:
555	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify == NULL) {
556	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
557	return -2;
558	}
559
560	return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
561	}
562
563	int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
564	{
565	return evp_pkey_signature_init(ctx, EVP_PKEY_OP_VERIFYRECOVER);
566	}
567
568	int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
569	unsigned char rout, size_t routlen,
570	const unsigned char *sig, size_t siglen)
571	{
572	int ret;
573
574	if (ctx == NULL) {
575	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
576	return -2;
577	}
578
579	if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
580	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
581	return -1;
582	}
583
584	if (ctx->op.sig.sigprovctx == NULL)
585	goto legacy;
586
587	ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout,
588	routlen,
589	(rout == NULL ? 0 : *routlen),
590	sig, siglen);
591	return ret;
592	legacy:
593	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify_recover == NULL) {
594	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
595	return -2;
596	}
597	M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
598	return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
599	}