mirror of
https://github.com/openssl/openssl.git
synced 2025-01-06 13:26:43 +08:00
02f060d17e
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10169)
405 lines
13 KiB
C
405 lines
13 KiB
C
/*
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* Copyright 2006-2018 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 "internal/cryptlib.h"
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include "crypto/evp.h"
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#include "internal/provider.h"
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#include "evp_local.h"
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#ifndef FIPS_MODE
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static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
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{
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EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
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return 0;
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}
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static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, const char *mdname,
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const char *props, ENGINE *e, EVP_PKEY *pkey,
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EVP_SIGNATURE *signature, int ver)
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{
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EVP_PKEY_CTX *locpctx = NULL;
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void *provkey = NULL;
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int ret;
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if (ctx->provctx != NULL) {
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if (!ossl_assert(ctx->digest != NULL)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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return 0;
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}
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if (ctx->digest->freectx != NULL)
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ctx->digest->freectx(ctx->provctx);
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ctx->provctx = NULL;
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}
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if (ctx->pctx == NULL) {
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ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
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if (ctx->pctx == NULL)
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return 0;
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} else if (pkey != NULL) {
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if (!EVP_PKEY_up_ref(pkey))
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return 0;
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EVP_PKEY_free(ctx->pctx->pkey);
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ctx->pctx->pkey = pkey;
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}
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locpctx = ctx->pctx;
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evp_pkey_ctx_free_old_ops(locpctx);
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if (locpctx->pkey == NULL)
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goto legacy;
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if (e != NULL || locpctx->engine != NULL)
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goto legacy;
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if (signature != NULL) {
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if (!EVP_SIGNATURE_up_ref(signature))
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goto err;
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} else {
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/*
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* TODO(3.0): Check for legacy handling. Remove this once all all
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* algorithms are moved to providers.
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*/
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switch (locpctx->pkey->type) {
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case NID_dsa:
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break;
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default:
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goto legacy;
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}
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signature
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= EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(locpctx->pkey->type), NULL);
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if (signature == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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}
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locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
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: EVP_PKEY_OP_SIGNCTX;
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locpctx->op.sig.signature = signature;
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locpctx->op.sig.sigprovctx
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= signature->newctx(ossl_provider_ctx(signature->prov));
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if (locpctx->op.sig.sigprovctx == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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provkey =
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evp_keymgmt_export_to_provider(locpctx->pkey, signature->keymgmt, 0);
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if (provkey == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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if (mdname == NULL) {
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mdname = EVP_MD_name(type);
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ctx->reqdigest = type;
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} else {
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/*
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* This might be requested by a later call to EVP_MD_CTX_md(). In that
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* case the "explicit fetch" rules apply for that function (as per
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* man pages), i.e. the ref count is not updated so the EVP_MD should
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* not be used beyound the lifetime of the EVP_MD_CTX.
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*/
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ctx->reqdigest
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= ctx->fetched_digest
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= EVP_MD_fetch(
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ossl_provider_library_context(EVP_SIGNATURE_provider(signature)),
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mdname, props);
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}
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if (ver) {
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if (signature->digest_verify_init == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx, mdname,
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props, provkey);
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} else {
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if (signature->digest_sign_init == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx, mdname,
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props, provkey);
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}
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return ret ? 1 : 0;
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err:
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evp_pkey_ctx_free_old_ops(locpctx);
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locpctx->operation = EVP_PKEY_OP_UNDEFINED;
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return 0;
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legacy:
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if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
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if (type == NULL) {
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int def_nid;
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if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
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type = EVP_get_digestbynid(def_nid);
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}
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if (type == NULL) {
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EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
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return 0;
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}
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}
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if (ver) {
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if (ctx->pctx->pmeth->verifyctx_init) {
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if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
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return 0;
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ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
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} else if (ctx->pctx->pmeth->digestverify != 0) {
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ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
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ctx->update = update;
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} else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
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return 0;
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}
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} else {
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if (ctx->pctx->pmeth->signctx_init) {
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if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
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return 0;
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ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
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} else if (ctx->pctx->pmeth->digestsign != 0) {
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ctx->pctx->operation = EVP_PKEY_OP_SIGN;
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ctx->update = update;
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} else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
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return 0;
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}
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}
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if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
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return 0;
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if (pctx)
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*pctx = ctx->pctx;
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if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
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return 1;
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if (!EVP_DigestInit_ex(ctx, type, e))
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return 0;
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/*
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* This indicates the current algorithm requires
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* special treatment before hashing the tbs-message.
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*/
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if (ctx->pctx->pmeth->digest_custom != NULL)
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return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
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return 1;
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}
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int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const char *mdname, const char *props, EVP_PKEY *pkey,
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EVP_SIGNATURE *signature)
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{
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return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
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0);
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}
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int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
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{
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return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 0);
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}
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int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const char *mdname, const char *props,
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EVP_PKEY *pkey, EVP_SIGNATURE *signature)
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{
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return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
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1);
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}
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int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
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const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
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{
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return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 1);
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}
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#endif /* FIPS_MDOE */
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int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
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{
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EVP_PKEY_CTX *pctx = ctx->pctx;
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if (pctx == NULL
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|| pctx->operation != EVP_PKEY_OP_SIGNCTX
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|| pctx->op.sig.sigprovctx == NULL
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|| pctx->op.sig.signature == NULL)
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goto legacy;
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return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
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data, dsize);
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legacy:
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return EVP_DigestUpdate(ctx, data, dsize);
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}
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int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
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{
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EVP_PKEY_CTX *pctx = ctx->pctx;
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if (pctx == NULL
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|| pctx->operation != EVP_PKEY_OP_VERIFYCTX
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|| pctx->op.sig.sigprovctx == NULL
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|| pctx->op.sig.signature == NULL)
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goto legacy;
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return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
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data, dsize);
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legacy:
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return EVP_DigestUpdate(ctx, data, dsize);
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}
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#ifndef FIPS_MODE
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int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
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size_t *siglen)
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{
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int sctx = 0, r = 0;
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EVP_PKEY_CTX *pctx = ctx->pctx;
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if (pctx == NULL
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|| pctx->operation != EVP_PKEY_OP_SIGNCTX
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|| pctx->op.sig.sigprovctx == NULL
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|| pctx->op.sig.signature == NULL)
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goto legacy;
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return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
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sigret, siglen, SIZE_MAX);
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legacy:
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if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
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if (!sigret)
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return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
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r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
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else {
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EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
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if (!dctx)
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return 0;
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r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
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EVP_PKEY_CTX_free(dctx);
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}
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return r;
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}
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if (pctx->pmeth->signctx)
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sctx = 1;
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else
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sctx = 0;
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if (sigret) {
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unsigned char md[EVP_MAX_MD_SIZE];
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unsigned int mdlen = 0;
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
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if (sctx)
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r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
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else
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r = EVP_DigestFinal_ex(ctx, md, &mdlen);
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} else {
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EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
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if (tmp_ctx == NULL)
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return 0;
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if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
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EVP_MD_CTX_free(tmp_ctx);
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return 0;
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}
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if (sctx)
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r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
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sigret, siglen, tmp_ctx);
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else
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r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
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EVP_MD_CTX_free(tmp_ctx);
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}
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if (sctx || !r)
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return r;
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if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
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return 0;
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} else {
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if (sctx) {
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if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
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return 0;
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} else {
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int s = EVP_MD_size(ctx->digest);
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if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
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return 0;
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}
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}
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return 1;
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}
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int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
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const unsigned char *tbs, size_t tbslen)
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{
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if (ctx->pctx->pmeth->digestsign != NULL)
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return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
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if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
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return 0;
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return EVP_DigestSignFinal(ctx, sigret, siglen);
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}
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int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
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size_t siglen)
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{
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unsigned char md[EVP_MAX_MD_SIZE];
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int r = 0;
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unsigned int mdlen = 0;
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int vctx = 0;
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EVP_PKEY_CTX *pctx = ctx->pctx;
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if (pctx == NULL
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|| pctx->operation != EVP_PKEY_OP_VERIFYCTX
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|| pctx->op.sig.sigprovctx == NULL
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|| pctx->op.sig.signature == NULL)
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goto legacy;
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return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
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sig, siglen);
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legacy:
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if (ctx->pctx->pmeth->verifyctx)
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vctx = 1;
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else
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vctx = 0;
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if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
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if (vctx)
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r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
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else
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r = EVP_DigestFinal_ex(ctx, md, &mdlen);
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} else {
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EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
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if (tmp_ctx == NULL)
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return -1;
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if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
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EVP_MD_CTX_free(tmp_ctx);
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return -1;
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}
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if (vctx)
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r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
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sig, siglen, tmp_ctx);
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else
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r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
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EVP_MD_CTX_free(tmp_ctx);
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}
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if (vctx || !r)
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return r;
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return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
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}
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int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
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size_t siglen, const unsigned char *tbs, size_t tbslen)
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{
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if (ctx->pctx->pmeth->digestverify != NULL)
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return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
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if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
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return -1;
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return EVP_DigestVerifyFinal(ctx, sigret, siglen);
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}
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#endif /* FIPS_MODE */
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