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https://github.com/openssl/openssl.git
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f925315203
Add EVP_PKEY_gen(), EVP_PKEY_Q_gen(), EVP_RSA_gen(), and EVP_EC_gen(). Also export auxiliary function OSSL_EC_curve_nid2name() and improve deprecation info on RSA and EC key generation/management functions. Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/14695)
421 lines
11 KiB
C
421 lines
11 KiB
C
/*
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* Copyright 2006-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <openssl/core.h>
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#include <openssl/core_names.h>
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#include "internal/cryptlib.h"
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#include "internal/core.h"
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include "crypto/bn.h"
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#include "crypto/asn1.h"
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#include "crypto/evp.h"
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#include "evp_local.h"
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static int gen_init(EVP_PKEY_CTX *ctx, int operation)
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{
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int ret = 0;
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if (ctx == NULL)
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goto not_supported;
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evp_pkey_ctx_free_old_ops(ctx);
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ctx->operation = operation;
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if (ctx->keymgmt == NULL || ctx->keymgmt->gen_init == NULL)
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goto legacy;
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switch (operation) {
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case EVP_PKEY_OP_PARAMGEN:
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ctx->op.keymgmt.genctx =
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evp_keymgmt_gen_init(ctx->keymgmt,
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OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, NULL);
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break;
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case EVP_PKEY_OP_KEYGEN:
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ctx->op.keymgmt.genctx =
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evp_keymgmt_gen_init(ctx->keymgmt, OSSL_KEYMGMT_SELECT_KEYPAIR,
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NULL);
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break;
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}
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if (ctx->op.keymgmt.genctx == NULL)
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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else
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ret = 1;
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goto end;
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legacy:
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#ifdef FIPS_MODULE
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goto not_supported;
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#else
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if (ctx->pmeth == NULL
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|| (operation == EVP_PKEY_OP_PARAMGEN
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&& ctx->pmeth->paramgen == NULL)
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|| (operation == EVP_PKEY_OP_KEYGEN
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&& ctx->pmeth->keygen == NULL))
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goto not_supported;
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ret = 1;
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switch (operation) {
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case EVP_PKEY_OP_PARAMGEN:
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if (ctx->pmeth->paramgen_init != NULL)
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ret = ctx->pmeth->paramgen_init(ctx);
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break;
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case EVP_PKEY_OP_KEYGEN:
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if (ctx->pmeth->keygen_init != NULL)
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ret = ctx->pmeth->keygen_init(ctx);
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break;
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}
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#endif
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end:
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if (ret <= 0 && ctx != NULL) {
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evp_pkey_ctx_free_old_ops(ctx);
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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}
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return ret;
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not_supported:
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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ret = -2;
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goto end;
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}
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int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
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{
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return gen_init(ctx, EVP_PKEY_OP_PARAMGEN);
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}
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int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
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{
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return gen_init(ctx, EVP_PKEY_OP_KEYGEN);
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}
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static int ossl_callback_to_pkey_gencb(const OSSL_PARAM params[], void *arg)
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{
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EVP_PKEY_CTX *ctx = arg;
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const OSSL_PARAM *param = NULL;
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int p = -1, n = -1;
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if (ctx->pkey_gencb == NULL)
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return 1; /* No callback? That's fine */
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if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_POTENTIAL))
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== NULL
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|| !OSSL_PARAM_get_int(param, &p))
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return 0;
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if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_ITERATION))
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== NULL
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|| !OSSL_PARAM_get_int(param, &n))
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return 0;
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ctx->keygen_info[0] = p;
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ctx->keygen_info[1] = n;
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return ctx->pkey_gencb(ctx);
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}
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int EVP_PKEY_generate(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
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{
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int ret = 0;
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OSSL_CALLBACK cb;
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EVP_PKEY *allocated_pkey = NULL;
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/* Legacy compatible keygen callback info, only used with provider impls */
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int gentmp[2];
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if (ppkey == NULL)
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return -1;
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if (ctx == NULL)
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goto not_supported;
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if ((ctx->operation & EVP_PKEY_OP_TYPE_GEN) == 0)
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goto not_initialized;
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if (*ppkey == NULL)
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*ppkey = allocated_pkey = EVP_PKEY_new();
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if (*ppkey == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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if (ctx->op.keymgmt.genctx == NULL)
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goto legacy;
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/*
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* Asssigning gentmp to ctx->keygen_info is something our legacy
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* implementations do. Because the provider implementations aren't
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* allowed to reach into our EVP_PKEY_CTX, we need to provide similar
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* space for backward compatibility. It's ok that we attach a local
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* variable, as it should only be useful in the calls down from here.
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* This is cleared as soon as it isn't useful any more, i.e. directly
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* after the evp_keymgmt_util_gen() call.
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*/
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ctx->keygen_info = gentmp;
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ctx->keygen_info_count = 2;
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ret = 1;
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if (ctx->pkey != NULL) {
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EVP_KEYMGMT *tmp_keymgmt = ctx->keymgmt;
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void *keydata =
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evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
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&tmp_keymgmt, ctx->propquery);
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if (tmp_keymgmt == NULL)
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goto not_supported;
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/*
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* It's ok if keydata is NULL here. The backend is expected to deal
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* with that as it sees fit.
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*/
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ret = evp_keymgmt_gen_set_template(ctx->keymgmt,
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ctx->op.keymgmt.genctx, keydata);
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}
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/*
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* the returned value from evp_keymgmt_util_gen() is cached in *ppkey,
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* so we do not need to save it, just check it.
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*/
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ret = ret
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&& (evp_keymgmt_util_gen(*ppkey, ctx->keymgmt, ctx->op.keymgmt.genctx,
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ossl_callback_to_pkey_gencb, ctx)
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!= NULL);
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ctx->keygen_info = NULL;
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#ifndef FIPS_MODULE
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/* In case |*ppkey| was originally a legacy key */
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if (ret)
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evp_pkey_free_legacy(*ppkey);
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#endif
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/*
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* Because we still have legacy keys
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* TODO remove this #legacy internal keys are gone
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*/
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(*ppkey)->type = ctx->legacy_keytype;
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goto end;
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legacy:
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#ifdef FIPS_MODULE
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goto not_supported;
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#else
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/*
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* If we get here then we're using legacy paramgen/keygen. In that case
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* the pkey in ctx (if there is one) had better not be provided (because the
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* legacy methods may not know how to handle it). However we can only get
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* here if ctx->op.keymgmt.genctx == NULL, but that should never be the case
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* if ctx->pkey is provided because we don't allow this when we initialise
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* the ctx.
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*/
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if (ctx->pkey != NULL && !ossl_assert(!evp_pkey_is_provided(ctx->pkey)))
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goto not_accessible;
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switch (ctx->operation) {
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case EVP_PKEY_OP_PARAMGEN:
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ret = ctx->pmeth->paramgen(ctx, *ppkey);
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break;
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case EVP_PKEY_OP_KEYGEN:
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ret = ctx->pmeth->keygen(ctx, *ppkey);
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break;
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default:
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goto not_supported;
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}
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#endif
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end:
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if (ret <= 0) {
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if (allocated_pkey != NULL)
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*ppkey = NULL;
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EVP_PKEY_free(allocated_pkey);
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}
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return ret;
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not_supported:
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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ret = -2;
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goto end;
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not_initialized:
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
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ret = -1;
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goto end;
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#ifndef FIPS_MODULE
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not_accessible:
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ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_DOMAIN_PARAMETERS);
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ret = -1;
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goto end;
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#endif
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}
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int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
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{
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if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
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return -1;
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}
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return EVP_PKEY_generate(ctx, ppkey);
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}
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int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
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{
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if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
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return -1;
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}
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return EVP_PKEY_generate(ctx, ppkey);
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}
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void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
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{
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ctx->pkey_gencb = cb;
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}
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EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
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{
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return ctx->pkey_gencb;
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}
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/*
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* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
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* callbacks.
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*/
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static int trans_cb(int a, int b, BN_GENCB *gcb)
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{
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EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
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ctx->keygen_info[0] = a;
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ctx->keygen_info[1] = b;
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return ctx->pkey_gencb(ctx);
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}
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void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
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{
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BN_GENCB_set(cb, trans_cb, ctx);
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}
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int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
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{
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if (idx == -1)
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return ctx->keygen_info_count;
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if (idx < 0 || idx > ctx->keygen_info_count)
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return 0;
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return ctx->keygen_info[idx];
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}
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#ifndef FIPS_MODULE
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EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
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const unsigned char *key, int keylen)
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{
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EVP_PKEY_CTX *mac_ctx = NULL;
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EVP_PKEY *mac_key = NULL;
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mac_ctx = EVP_PKEY_CTX_new_id(type, e);
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if (!mac_ctx)
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return NULL;
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if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
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goto merr;
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if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
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goto merr;
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if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
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goto merr;
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merr:
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EVP_PKEY_CTX_free(mac_ctx);
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return mac_key;
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}
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#endif /* FIPS_MODULE */
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/*- All methods below can also be used in FIPS_MODULE */
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static int fromdata_init(EVP_PKEY_CTX *ctx, int operation)
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{
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if (ctx == NULL || ctx->keytype == NULL)
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goto not_supported;
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evp_pkey_ctx_free_old_ops(ctx);
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if (ctx->keymgmt == NULL)
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goto not_supported;
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ctx->operation = operation;
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return 1;
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not_supported:
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if (ctx != NULL)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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int EVP_PKEY_fromdata_init(EVP_PKEY_CTX *ctx)
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{
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return fromdata_init(ctx, EVP_PKEY_OP_FROMDATA);
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}
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int EVP_PKEY_fromdata(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey, int selection,
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OSSL_PARAM params[])
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{
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void *keydata = NULL;
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if (ctx == NULL || (ctx->operation & EVP_PKEY_OP_FROMDATA) == 0) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ppkey == NULL)
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return -1;
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if (*ppkey == NULL)
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*ppkey = EVP_PKEY_new();
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if (*ppkey == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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keydata = evp_keymgmt_util_fromdata(*ppkey, ctx->keymgmt, selection, params);
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if (keydata == NULL)
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return 0;
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/* keydata is cached in *ppkey, so we need not bother with it further */
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return 1;
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}
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const OSSL_PARAM *EVP_PKEY_fromdata_settable(EVP_PKEY_CTX *ctx, int selection)
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{
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/* We call fromdata_init to get ctx->keymgmt populated */
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if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED) == 1)
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return evp_keymgmt_import_types(ctx->keymgmt, selection);
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return NULL;
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}
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static OSSL_CALLBACK ossl_pkey_todata_cb;
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static int ossl_pkey_todata_cb(const OSSL_PARAM params[], void *arg)
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{
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OSSL_PARAM **ret = arg;
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*ret = OSSL_PARAM_dup(params);
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return 1;
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}
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int EVP_PKEY_todata(const EVP_PKEY *pkey, int selection, OSSL_PARAM **params)
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{
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if (params == NULL)
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return 0;
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return EVP_PKEY_export(pkey, selection, ossl_pkey_todata_cb, params);
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}
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int EVP_PKEY_export(const EVP_PKEY *pkey, int selection,
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OSSL_CALLBACK *export_cb, void *export_cbarg)
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{
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return evp_keymgmt_util_export(pkey, selection, export_cb, export_cbarg);
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}
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