[thirdparty/openssl.git] / crypto / evp / pmeth_fn.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 "internal/evp_int.h"
#include "internal/provider.h"
#include "evp_locl.h"

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

    signature->lock = CRYPTO_THREAD_lock_new();
    if (signature->lock == NULL) {
        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,
                                         void *vkeymgmt_data)
{
    /*
     * Signature functions cannot work without a key, and key management
     * from the same provider to manage its keys.  We therefore fetch
     * a key management method using the same algorithm and properties
     * and pass that down to evp_generic_fetch to be passed on to our
     * evp_signature_from_dispatch, which will attach the key management
     * method to the newly created key exchange method as long as the
     * provider matches.
     */
    struct keymgmt_data_st *keymgmt_data = vkeymgmt_data;
    EVP_KEYMGMT *keymgmt =
        evp_keymgmt_fetch_by_number(keymgmt_data->ctx, name_id,
                                    keymgmt_data->properties);
    EVP_SIGNATURE *signature = NULL;
    int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
    int gparamfncnt = 0, sparamfncnt = 0;

    if (keymgmt == NULL || EVP_KEYMGMT_provider(keymgmt) != prov) {
        ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEYMGMT_AVAILABLE);
        goto err;
    }

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

    signature->name_id = name_id;
    signature->keymgmt = keymgmt;
    keymgmt = NULL;              /* avoid double free on failure below */

    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_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;
        }
    }
    if (ctxfncnt != 2
        || (signfncnt != 2 && verifyfncnt != 2 && verifyrecfncnt != 2)
        || (gparamfncnt != 0 && gparamfncnt != 2)
        || (sparamfncnt != 0 && sparamfncnt != 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 pair of
         * "signature" functions: (sign_init, sign) or (verify_init verify) or
         * (verify_recover_init, verify_recover). 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 dupctx function is
         * optional.
         */
        ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
        goto err;
    }

    return signature;
 err:
    EVP_SIGNATURE_free(signature);
    EVP_KEYMGMT_free(keymgmt);
    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;
        EVP_KEYMGMT_free(signature->keymgmt);
        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)
{
    struct keymgmt_data_st keymgmt_data;

    /*
     * A signature operation cannot work without a key, so we need key
     * management from the same provider to manage its keys.
     */
    keymgmt_data.ctx = ctx;
    keymgmt_data.properties = properties;
    return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
                             evp_signature_from_dispatch, &keymgmt_data,
                             (int (*)(void *))EVP_SIGNATURE_up_ref,
                             (void (*)(void *))EVP_SIGNATURE_free);
}

static int evp_pkey_signature_init(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature,
                                   int operation)
{
    int ret = 0;
    void *provkey = 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;

    if (ctx->engine != NULL)
        goto legacy;

    if (signature != NULL) {
        if (!EVP_SIGNATURE_up_ref(signature))
            goto err;
    } else {
        int nid = ctx->pkey != NULL ? ctx->pkey->type : ctx->pmeth->pkey_id;

        /*
         * TODO(3.0): Check for legacy handling. Remove this once all all
         * algorithms are moved to providers.
         */
        if (ctx->pkey != NULL) {
            switch (ctx->pkey->type) {
            case NID_dsa:
                break;
            default:
                goto legacy;
            }
            signature = EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(nid), NULL);
        } else {
            goto legacy;
        }

        if (signature == NULL) {
            EVPerr(0, EVP_R_INITIALIZATION_ERROR);
            goto err;
        }
    }

    ctx->op.sig.signature = signature;
    if (ctx->pkey != NULL) {
        provkey = evp_keymgmt_export_to_provider(ctx->pkey, signature->keymgmt);
        if (provkey == NULL) {
            EVPerr(0, EVP_R_INITIALIZATION_ERROR);
            goto err;
        }
    }
    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:
    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_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
{
    return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_SIGN);
}

int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
{
    return evp_pkey_signature_init(ctx, NULL, 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_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
{
    return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFY);
}

int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
{
    return evp_pkey_signature_init(ctx, NULL, 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_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature)
{
    return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFYRECOVER);
}

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

int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
{
    int ret;
    if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
        EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }
    ctx->operation = EVP_PKEY_OP_ENCRYPT;
    if (!ctx->pmeth->encrypt_init)
        return 1;
    ret = ctx->pmeth->encrypt_init(ctx);
    if (ret <= 0)
        ctx->operation = EVP_PKEY_OP_UNDEFINED;
    return ret;
}

int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
                     unsigned char *out, size_t *outlen,
                     const unsigned char *in, size_t inlen)
{
    if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
        EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }
    if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
        EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
        return -1;
    }
    M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
        return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
}

int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
{
    int ret;
    if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
        EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }
    ctx->operation = EVP_PKEY_OP_DECRYPT;
    if (!ctx->pmeth->decrypt_init)
        return 1;
    ret = ctx->pmeth->decrypt_init(ctx);
    if (ret <= 0)
        ctx->operation = EVP_PKEY_OP_UNDEFINED;
    return ret;
}

int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
                     unsigned char *out, size_t *outlen,
                     const unsigned char *in, size_t inlen)
{
    if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
        EVPerr(EVP_F_EVP_PKEY_DECRYPT,
               EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }
    if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
        EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
        return -1;
    }
    M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
        return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
}
Commit	Line	Data
0f113f3e	1	/*
aa6bb135	2	* Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
f733a5ef	3	*
4a8b0c55	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
aa6bb135 RS	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
f733a5ef DSH	8	*/
	9
	10	#include <stdio.h>
	11	#include <stdlib.h>
c20276e4	12	#include <openssl/objects.h>
f733a5ef	13	#include <openssl/evp.h>
ff64702b	14	#include "internal/cryptlib.h"
27af42f9	15	#include "internal/evp_int.h"
dfcb5d29	16	#include "internal/provider.h"
ff64702b	17	#include "evp_locl.h"
b010b7c4	18
dfcb5d29 MC	19	static EVP_SIGNATURE evp_signature_new(OSSL_PROVIDER prov)
	20	{
	21	EVP_SIGNATURE *signature = OPENSSL_zalloc(sizeof(EVP_SIGNATURE));
	22
	23	signature->lock = CRYPTO_THREAD_lock_new();
	24	if (signature->lock == NULL) {
	25	OPENSSL_free(signature);
	26	return NULL;
	27	}
	28	signature->prov = prov;
	29	ossl_provider_up_ref(prov);
	30	signature->refcnt = 1;
	31
	32	return signature;
	33	}
	34
f7c16d48	35	static void *evp_signature_from_dispatch(int name_id,
dfcb5d29 MC	36	const OSSL_DISPATCH *fns,
	37	OSSL_PROVIDER *prov,
	38	void *vkeymgmt_data)
	39	{
	40	/*
	41	* Signature functions cannot work without a key, and key management
	42	* from the same provider to manage its keys. We therefore fetch
	43	* a key management method using the same algorithm and properties
	44	* and pass that down to evp_generic_fetch to be passed on to our
	45	* evp_signature_from_dispatch, which will attach the key management
	46	* method to the newly created key exchange method as long as the
	47	* provider matches.
	48	*/
	49	struct keymgmt_data_st *keymgmt_data = vkeymgmt_data;
f7c16d48 RL	50	EVP_KEYMGMT *keymgmt =
	51	evp_keymgmt_fetch_by_number(keymgmt_data->ctx, name_id,
	52	keymgmt_data->properties);
dfcb5d29	53	EVP_SIGNATURE *signature = NULL;
390acbeb	54	int ctxfncnt = 0, signfncnt = 0, verifyfncnt = 0, verifyrecfncnt = 0;
9c45222d	55	int gparamfncnt = 0, sparamfncnt = 0;
dfcb5d29 MC	56
	57	if (keymgmt == NULL \|\| EVP_KEYMGMT_provider(keymgmt) != prov) {
	58	ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEYMGMT_AVAILABLE);
	59	goto err;
	60	}
	61
f7c16d48	62	if ((signature = evp_signature_new(prov)) == NULL) {
dfcb5d29 MC	63	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	64	goto err;
	65	}
	66
f7c16d48	67	signature->name_id = name_id;
dfcb5d29 MC	68	signature->keymgmt = keymgmt;
	69	keymgmt = NULL; /* avoid double free on failure below */
	70
	71	for (; fns->function_id != 0; fns++) {
	72	switch (fns->function_id) {
	73	case OSSL_FUNC_SIGNATURE_NEWCTX:
	74	if (signature->newctx != NULL)
	75	break;
	76	signature->newctx = OSSL_get_OP_signature_newctx(fns);
390acbeb	77	ctxfncnt++;
dfcb5d29 MC	78	break;
	79	case OSSL_FUNC_SIGNATURE_SIGN_INIT:
	80	if (signature->sign_init != NULL)
	81	break;
	82	signature->sign_init = OSSL_get_OP_signature_sign_init(fns);
390acbeb	83	signfncnt++;
dfcb5d29 MC	84	break;
	85	case OSSL_FUNC_SIGNATURE_SIGN:
	86	if (signature->sign != NULL)
	87	break;
	88	signature->sign = OSSL_get_OP_signature_sign(fns);
390acbeb MC	89	signfncnt++;
	90	break;
	91	case OSSL_FUNC_SIGNATURE_VERIFY_INIT:
	92	if (signature->verify_init != NULL)
	93	break;
	94	signature->verify_init = OSSL_get_OP_signature_verify_init(fns);
	95	verifyfncnt++;
	96	break;
	97	case OSSL_FUNC_SIGNATURE_VERIFY:
	98	if (signature->verify != NULL)
	99	break;
	100	signature->verify = OSSL_get_OP_signature_verify(fns);
	101	verifyfncnt++;
	102	break;
	103	case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER_INIT:
	104	if (signature->verify_recover_init != NULL)
	105	break;
	106	signature->verify_recover_init
	107	= OSSL_get_OP_signature_verify_recover_init(fns);
	108	verifyrecfncnt++;
	109	break;
	110	case OSSL_FUNC_SIGNATURE_VERIFY_RECOVER:
	111	if (signature->verify_recover != NULL)
	112	break;
	113	signature->verify_recover
	114	= OSSL_get_OP_signature_verify_recover(fns);
	115	verifyrecfncnt++;
dfcb5d29 MC	116	break;
	117	case OSSL_FUNC_SIGNATURE_FREECTX:
	118	if (signature->freectx != NULL)
	119	break;
	120	signature->freectx = OSSL_get_OP_signature_freectx(fns);
390acbeb	121	ctxfncnt++;
dfcb5d29 MC	122	break;
	123	case OSSL_FUNC_SIGNATURE_DUPCTX:
	124	if (signature->dupctx != NULL)
	125	break;
	126	signature->dupctx = OSSL_get_OP_signature_dupctx(fns);
	127	break;
9c45222d MC	128	case OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS:
9c45222d MC	129	if (signature->get_ctx_params != NULL)
dfcb5d29	130	break;
9c45222d MC	131	signature->get_ctx_params
	132	= OSSL_get_OP_signature_get_ctx_params(fns);
	133	gparamfncnt++;
	134	break;
	135	case OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS:
	136	if (signature->gettable_ctx_params != NULL)
	137	break;
	138	signature->gettable_ctx_params
	139	= OSSL_get_OP_signature_gettable_ctx_params(fns);
	140	gparamfncnt++;
	141	break;
	142	case OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS:
	143	if (signature->set_ctx_params != NULL)
	144	break;
	145	signature->set_ctx_params
	146	= OSSL_get_OP_signature_set_ctx_params(fns);
	147	sparamfncnt++;
	148	break;
	149	case OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS:
	150	if (signature->settable_ctx_params != NULL)
	151	break;
	152	signature->settable_ctx_params
	153	= OSSL_get_OP_signature_settable_ctx_params(fns);
	154	sparamfncnt++;
dfcb5d29 MC	155	break;
	156	}
	157	}
390acbeb	158	if (ctxfncnt != 2
9c45222d MC	159	\|\| (signfncnt != 2 && verifyfncnt != 2 && verifyrecfncnt != 2)
	160	\|\| (gparamfncnt != 0 && gparamfncnt != 2)
	161	\|\| (sparamfncnt != 0 && sparamfncnt != 2)) {
dfcb5d29 MC	162	/*
dfcb5d29 MC	163	* In order to be a consistent set of functions we must have at least
390acbeb MC	164	* a set of context functions (newctx and freectx) as well as a pair of
390acbeb MC	165	* "signature" functions: (sign_init, sign) or (verify_init verify) or
9c45222d MC	166	* (verify_recover_init, verify_recover). set_ctx_params and
	167	* settable_ctx_params are optional, but if one of them is present then
	168	* the other one must also be present. The same applies to
	169	* get_ctx_params and gettable_ctx_params. The dupctx function is
	170	* optional.
dfcb5d29 MC	171	*/
	172	ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
	173	goto err;
	174	}
	175
	176	return signature;
	177	err:
	178	EVP_SIGNATURE_free(signature);
	179	EVP_KEYMGMT_free(keymgmt);
	180	return NULL;
	181	}
	182
	183	void EVP_SIGNATURE_free(EVP_SIGNATURE *signature)
	184	{
	185	if (signature != NULL) {
	186	int i;
	187
	188	CRYPTO_DOWN_REF(&signature->refcnt, &i, signature->lock);
	189	if (i > 0)
	190	return;
	191	EVP_KEYMGMT_free(signature->keymgmt);
	192	ossl_provider_free(signature->prov);
dfcb5d29 MC	193	CRYPTO_THREAD_lock_free(signature->lock);
	194	OPENSSL_free(signature);
	195	}
	196	}
	197
	198	int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature)
	199	{
	200	int ref = 0;
	201
	202	CRYPTO_UP_REF(&signature->refcnt, &ref, signature->lock);
	203	return 1;
	204	}
	205
	206	OSSL_PROVIDER EVP_SIGNATURE_provider(const EVP_SIGNATURE signature)
	207	{
	208	return signature->prov;
	209	}
	210
	211	EVP_SIGNATURE EVP_SIGNATURE_fetch(OPENSSL_CTX ctx, const char *algorithm,
	212	const char *properties)
	213	{
	214	struct keymgmt_data_st keymgmt_data;
	215
	216	/*
	217	* A signature operation cannot work without a key, so we need key
	218	* management from the same provider to manage its keys.
	219	*/
	220	keymgmt_data.ctx = ctx;
	221	keymgmt_data.properties = properties;
	222	return evp_generic_fetch(ctx, OSSL_OP_SIGNATURE, algorithm, properties,
	223	evp_signature_from_dispatch, &keymgmt_data,
	224	(int ()(void ))EVP_SIGNATURE_up_ref,
	225	(void ()(void ))EVP_SIGNATURE_free);
	226	}
	227
390acbeb MC	228	static int evp_pkey_signature_init(EVP_PKEY_CTX ctx, EVP_SIGNATURE signature,
390acbeb MC	229	int operation)
0f113f3e	230	{
390acbeb	231	int ret = 0;
dfcb5d29 MC	232	void *provkey = NULL;
	233
	234	if (ctx == NULL) {
	235	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
0f113f3e MC	236	return -2;
0f113f3e MC	237	}
dfcb5d29	238
864b89ce	239	evp_pkey_ctx_free_old_ops(ctx);
390acbeb	240	ctx->operation = operation;
dfcb5d29 MC	241
	242	if (ctx->engine != NULL)
	243	goto legacy;
	244
	245	if (signature != NULL) {
	246	if (!EVP_SIGNATURE_up_ref(signature))
	247	goto err;
	248	} else {
	249	int nid = ctx->pkey != NULL ? ctx->pkey->type : ctx->pmeth->pkey_id;
	250
	251	/*
	252	* TODO(3.0): Check for legacy handling. Remove this once all all
	253	* algorithms are moved to providers.
	254	*/
	255	if (ctx->pkey != NULL) {
	256	switch (ctx->pkey->type) {
4889dadc MC	257	case NID_dsa:
4889dadc MC	258	break;
dfcb5d29 MC	259	default:
	260	goto legacy;
	261	}
	262	signature = EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(nid), NULL);
	263	} else {
	264	goto legacy;
	265	}
	266
	267	if (signature == NULL) {
	268	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	269	goto err;
	270	}
	271	}
	272
864b89ce	273	ctx->op.sig.signature = signature;
dfcb5d29 MC	274	if (ctx->pkey != NULL) {
	275	provkey = evp_keymgmt_export_to_provider(ctx->pkey, signature->keymgmt);
	276	if (provkey == NULL) {
	277	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	278	goto err;
	279	}
	280	}
864b89ce MC	281	ctx->op.sig.sigprovctx = signature->newctx(ossl_provider_ctx(signature->prov));
864b89ce MC	282	if (ctx->op.sig.sigprovctx == NULL) {
dfcb5d29 MC	283	/* The provider key can stay in the cache */
	284	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	285	goto err;
	286	}
dfcb5d29	287
390acbeb MC	288	switch (operation) {
	289	case EVP_PKEY_OP_SIGN:
	290	if (signature->sign_init == NULL) {
	291	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	292	ret = -2;
	293	goto err;
	294	}
864b89ce	295	ret = signature->sign_init(ctx->op.sig.sigprovctx, provkey);
390acbeb MC	296	break;
	297	case EVP_PKEY_OP_VERIFY:
	298	if (signature->verify_init == NULL) {
	299	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	300	ret = -2;
	301	goto err;
	302	}
864b89ce	303	ret = signature->verify_init(ctx->op.sig.sigprovctx, provkey);
390acbeb MC	304	break;
	305	case EVP_PKEY_OP_VERIFYRECOVER:
	306	if (signature->verify_recover_init == NULL) {
	307	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	308	ret = -2;
	309	goto err;
	310	}
864b89ce	311	ret = signature->verify_recover_init(ctx->op.sig.sigprovctx, provkey);
390acbeb MC	312	break;
	313	default:
	314	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	315	goto err;
	316	}
	317
	318	if (ret <= 0) {
864b89ce MC	319	signature->freectx(ctx->op.sig.sigprovctx);
864b89ce MC	320	ctx->op.sig.sigprovctx = NULL;
390acbeb MC	321	goto err;
	322	}
	323	return 1;
dfcb5d29 MC	324
dfcb5d29 MC	325	legacy:
390acbeb MC	326	if (ctx->pmeth == NULL
	327	\|\| (operation == EVP_PKEY_OP_SIGN && ctx->pmeth->sign == NULL)
	328	\|\| (operation == EVP_PKEY_OP_VERIFY && ctx->pmeth->verify == NULL)
	329	\|\| (operation == EVP_PKEY_OP_VERIFYRECOVER
	330	&& ctx->pmeth->verify_recover == NULL)) {
dfcb5d29 MC	331	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	332	return -2;
	333	}
	334
390acbeb MC	335	switch (operation) {
	336	case EVP_PKEY_OP_SIGN:
	337	if (ctx->pmeth->sign_init == NULL)
	338	return 1;
	339	ret = ctx->pmeth->sign_init(ctx);
	340	break;
	341	case EVP_PKEY_OP_VERIFY:
	342	if (ctx->pmeth->verify_init == NULL)
	343	return 1;
	344	ret = ctx->pmeth->verify_init(ctx);
	345	break;
	346	case EVP_PKEY_OP_VERIFYRECOVER:
	347	if (ctx->pmeth->verify_recover_init == NULL)
	348	return 1;
	349	ret = ctx->pmeth->verify_recover_init(ctx);
	350	break;
	351	default:
	352	EVPerr(0, EVP_R_INITIALIZATION_ERROR);
	353	goto err;
	354	}
0f113f3e	355	if (ret <= 0)
390acbeb	356	goto err;
0f113f3e	357	return ret;
390acbeb MC	358
	359	err:
	360	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	361	return ret;
	362	}
	363
	364	int EVP_PKEY_sign_init_ex(EVP_PKEY_CTX ctx, EVP_SIGNATURE signature)
	365	{
	366	return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_SIGN);
0f113f3e	367	}
f733a5ef	368
dfcb5d29 MC	369	int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
dfcb5d29 MC	370	{
390acbeb	371	return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_SIGN);
dfcb5d29 MC	372	}
dfcb5d29 MC	373
f733a5ef	374	int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
0f113f3e MC	375	unsigned char sig, size_t siglen,
	376	const unsigned char *tbs, size_t tbslen)
	377	{
dfcb5d29 MC	378	int ret;
	379
	380	if (ctx == NULL) {
	381	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
0f113f3e MC	382	return -2;
0f113f3e MC	383	}
dfcb5d29	384
0f113f3e	385	if (ctx->operation != EVP_PKEY_OP_SIGN) {
dfcb5d29	386	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
0f113f3e MC	387	return -1;
0f113f3e MC	388	}
dfcb5d29	389
864b89ce	390	if (ctx->op.sig.sigprovctx == NULL)
dfcb5d29 MC	391	goto legacy;
dfcb5d29 MC	392
864b89ce MC	393	ret = ctx->op.sig.signature->sign(ctx->op.sig.sigprovctx, sig, siglen,
864b89ce MC	394	SIZE_MAX, tbs, tbslen);
dfcb5d29 MC	395
	396	return ret;
	397	legacy:
	398
	399	if (ctx->pmeth == NULL \|\| ctx->pmeth->sign == NULL) {
	400	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	401	return -2;
	402	}
	403
0f113f3e MC	404	M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
	405	return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
	406	}
f733a5ef	407
390acbeb MC	408	int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX ctx, EVP_SIGNATURE signature)
	409	{
	410	return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFY);
	411	}
	412
cd763898	413	int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
0f113f3e	414	{
390acbeb	415	return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_VERIFY);
0f113f3e	416	}
f733a5ef DSH	417
f733a5ef DSH	418	int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
0f113f3e MC	419	const unsigned char *sig, size_t siglen,
	420	const unsigned char *tbs, size_t tbslen)
	421	{
390acbeb MC	422	int ret;
	423
	424	if (ctx == NULL) {
	425	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
0f113f3e MC	426	return -2;
0f113f3e MC	427	}
390acbeb	428
0f113f3e	429	if (ctx->operation != EVP_PKEY_OP_VERIFY) {
390acbeb	430	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
0f113f3e MC	431	return -1;
0f113f3e MC	432	}
390acbeb	433
864b89ce	434	if (ctx->op.sig.sigprovctx == NULL)
390acbeb MC	435	goto legacy;
390acbeb MC	436
864b89ce MC	437	ret = ctx->op.sig.signature->verify(ctx->op.sig.sigprovctx, sig, siglen,
864b89ce MC	438	tbs, tbslen);
390acbeb MC	439
	440	return ret;
	441	legacy:
	442	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify == NULL) {
	443	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	444	return -2;
	445	}
	446
0f113f3e MC	447	return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
0f113f3e MC	448	}
f733a5ef	449
390acbeb MC	450	int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX ctx, EVP_SIGNATURE signature)
	451	{
	452	return evp_pkey_signature_init(ctx, signature, EVP_PKEY_OP_VERIFYRECOVER);
	453	}
	454
cd763898	455	int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
0f113f3e	456	{
390acbeb	457	return evp_pkey_signature_init(ctx, NULL, EVP_PKEY_OP_VERIFYRECOVER);
0f113f3e	458	}
f733a5ef DSH	459
f733a5ef DSH	460	int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
0f113f3e MC	461	unsigned char rout, size_t routlen,
	462	const unsigned char *sig, size_t siglen)
	463	{
390acbeb MC	464	int ret;
	465
	466	if (ctx == NULL) {
	467	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
0f113f3e MC	468	return -2;
0f113f3e MC	469	}
390acbeb	470
0f113f3e	471	if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
390acbeb	472	EVPerr(0, EVP_R_OPERATON_NOT_INITIALIZED);
0f113f3e MC	473	return -1;
0f113f3e MC	474	}
390acbeb	475
864b89ce	476	if (ctx->op.sig.sigprovctx == NULL)
390acbeb MC	477	goto legacy;
390acbeb MC	478
864b89ce MC	479	ret = ctx->op.sig.signature->verify_recover(ctx->op.sig.sigprovctx, rout,
	480	routlen,
	481	(rout == NULL ? 0 : *routlen),
	482	sig, siglen);
390acbeb MC	483	return ret;
	484	legacy:
	485	if (ctx->pmeth == NULL \|\| ctx->pmeth->verify_recover == NULL) {
	486	EVPerr(0, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	487	return -2;
	488	}
0f113f3e MC	489	M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
	490	return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
	491	}
f733a5ef	492
cd763898	493	int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
0f113f3e MC	494	{
	495	int ret;
	496	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->encrypt) {
	497	EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
	498	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	499	return -2;
	500	}
	501	ctx->operation = EVP_PKEY_OP_ENCRYPT;
	502	if (!ctx->pmeth->encrypt_init)
	503	return 1;
	504	ret = ctx->pmeth->encrypt_init(ctx);
	505	if (ret <= 0)
	506	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	507	return ret;
	508	}
f733a5ef DSH	509
f733a5ef DSH	510	int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
0f113f3e MC	511	unsigned char out, size_t outlen,
	512	const unsigned char *in, size_t inlen)
	513	{
	514	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->encrypt) {
	515	EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
	516	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	517	return -2;
	518	}
	519	if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
	520	EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
	521	return -1;
	522	}
	523	M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
	524	return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
	525	}
f733a5ef	526
cd763898	527	int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
0f113f3e MC	528	{
	529	int ret;
	530	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->decrypt) {
	531	EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
	532	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	533	return -2;
	534	}
	535	ctx->operation = EVP_PKEY_OP_DECRYPT;
	536	if (!ctx->pmeth->decrypt_init)
	537	return 1;
	538	ret = ctx->pmeth->decrypt_init(ctx);
	539	if (ret <= 0)
	540	ctx->operation = EVP_PKEY_OP_UNDEFINED;
	541	return ret;
	542	}
f733a5ef DSH	543
f733a5ef DSH	544	int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
0f113f3e MC	545	unsigned char out, size_t outlen,
	546	const unsigned char *in, size_t inlen)
	547	{
	548	if (!ctx \|\| !ctx->pmeth \|\| !ctx->pmeth->decrypt) {
	549	EVPerr(EVP_F_EVP_PKEY_DECRYPT,
	550	EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	551	return -2;
	552	}
	553	if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
	554	EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
	555	return -1;
	556	}
	557	M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
	558	return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
	559	}