X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fm_sigver.c;h=0a51493efb83f37c2a6acdf120fe13659a8d1c17;hp=6ab71907ab673453e29716cd87103a06066b6c6b;hb=HEAD;hpb=baecb96e8a7d109cfbf816038abea45d1d6c78e3 diff --git a/crypto/evp/m_sigver.c b/crypto/evp/m_sigver.c index 6ab71907ab..3a979f4bd4 100644 --- a/crypto/evp/m_sigver.c +++ b/crypto/evp/m_sigver.c @@ -1,170 +1,718 @@ -/* m_sigver.c */ -/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL - * project 2006. - */ -/* ==================================================================== - * Copyright (c) 2006,2007 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * licensing@OpenSSL.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). +/* + * Copyright 2006-2023 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 -#include "cryptlib.h" +#include "internal/cryptlib.h" #include #include -#include -#include "evp_locl.h" +#include "crypto/evp.h" +#include "internal/provider.h" +#include "internal/numbers.h" /* includes SIZE_MAX */ +#include "evp_local.h" + +#ifndef FIPS_MODULE + +static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen) +{ + ERR_raise(ERR_LIB_EVP, EVP_R_ONLY_ONESHOT_SUPPORTED); + return 0; +} + +/* + * If we get the "NULL" md then the name comes back as "UNDEF". We want to use + * NULL for this. + */ +static const char *canon_mdname(const char *mdname) +{ + if (mdname != NULL && strcmp(mdname, "UNDEF") == 0) + return NULL; + + return mdname; +} static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, - const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, - int ver) - { - int r = 0; - if (ctx->pctx == NULL) - ctx->pctx = EVP_PKEY_CTX_new(pkey, e); - if (ctx->pctx == NULL) - return 0; - if (ver) - { - if (ctx->pctx->pmeth->verifyctx_init) - { - r = ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx); - if (r <= 0) - return 0; - } - else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) - return 0; - } - else - { - if (ctx->pctx->pmeth->signctx_init) - { - r = ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx); - if (r <= 0) - return 0; - } - if (EVP_PKEY_sign_init(ctx->pctx) <= 0) - return 0; - } - if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0) - return 0; - if (pctx) - *pctx = ctx->pctx; - if ((r != 2) && !EVP_DigestInit_ex(ctx, type, e)) - return 0; - return 1; - } + const EVP_MD *type, const char *mdname, + OSSL_LIB_CTX *libctx, const char *props, + ENGINE *e, EVP_PKEY *pkey, int ver, + const OSSL_PARAM params[]) +{ + EVP_PKEY_CTX *locpctx = NULL; + EVP_SIGNATURE *signature = NULL; + EVP_KEYMGMT *tmp_keymgmt = NULL; + const OSSL_PROVIDER *tmp_prov = NULL; + const char *supported_sig = NULL; + char locmdname[80] = ""; /* 80 chars should be enough */ + void *provkey = NULL; + int ret, iter, reinit = 1; + + if (!evp_md_ctx_free_algctx(ctx)) + return 0; + + if (ctx->pctx == NULL) { + reinit = 0; + if (e == NULL) + ctx->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, props); + else + ctx->pctx = EVP_PKEY_CTX_new(pkey, e); + } + if (ctx->pctx == NULL) + return 0; + + EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_FINALISED); + + locpctx = ctx->pctx; + ERR_set_mark(); + + if (evp_pkey_ctx_is_legacy(locpctx)) + goto legacy; + + /* do not reinitialize if pkey is set or operation is different */ + if (reinit + && (pkey != NULL + || locpctx->operation != (ver ? EVP_PKEY_OP_VERIFYCTX + : EVP_PKEY_OP_SIGNCTX) + || (signature = locpctx->op.sig.signature) == NULL + || locpctx->op.sig.algctx == NULL)) + reinit = 0; + + if (props == NULL) + props = locpctx->propquery; + + if (locpctx->pkey == NULL) { + ERR_clear_last_mark(); + ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET); + goto err; + } + + if (!reinit) { + evp_pkey_ctx_free_old_ops(locpctx); + } else { + if (mdname == NULL && type == NULL) + mdname = canon_mdname(EVP_MD_get0_name(ctx->reqdigest)); + goto reinitialize; + } + + /* + * Try to derive the supported signature from |locpctx->keymgmt|. + */ + if (!ossl_assert(locpctx->pkey->keymgmt == NULL + || locpctx->pkey->keymgmt == locpctx->keymgmt)) { + ERR_clear_last_mark(); + ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); + goto err; + } + supported_sig = evp_keymgmt_util_query_operation_name(locpctx->keymgmt, + OSSL_OP_SIGNATURE); + if (supported_sig == NULL) { + ERR_clear_last_mark(); + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + + /* + * We perform two iterations: + * + * 1. Do the normal signature fetch, using the fetching data given by + * the EVP_PKEY_CTX. + * 2. Do the provider specific signature fetch, from the same provider + * as |ctx->keymgmt| + * + * We then try to fetch the keymgmt from the same provider as the + * signature, and try to export |ctx->pkey| to that keymgmt (when + * this keymgmt happens to be the same as |ctx->keymgmt|, the export + * is a no-op, but we call it anyway to not complicate the code even + * more). + * If the export call succeeds (returns a non-NULL provider key pointer), + * we're done and can perform the operation itself. If not, we perform + * the second iteration, or jump to legacy. + */ + for (iter = 1, provkey = NULL; iter < 3 && provkey == NULL; iter++) { + EVP_KEYMGMT *tmp_keymgmt_tofree = NULL; + + /* + * If we're on the second iteration, free the results from the first. + * They are NULL on the first iteration, so no need to check what + * iteration we're on. + */ + EVP_SIGNATURE_free(signature); + EVP_KEYMGMT_free(tmp_keymgmt); + + switch (iter) { + case 1: + signature = EVP_SIGNATURE_fetch(locpctx->libctx, supported_sig, + locpctx->propquery); + if (signature != NULL) + tmp_prov = EVP_SIGNATURE_get0_provider(signature); + break; + case 2: + tmp_prov = EVP_KEYMGMT_get0_provider(locpctx->keymgmt); + signature = + evp_signature_fetch_from_prov((OSSL_PROVIDER *)tmp_prov, + supported_sig, locpctx->propquery); + if (signature == NULL) + goto legacy; + break; + } + if (signature == NULL) + continue; + + /* + * Ensure that the key is provided, either natively, or as a cached + * export. We start by fetching the keymgmt with the same name as + * |locpctx->pkey|, but from the provider of the signature method, using + * the same property query as when fetching the signature method. + * With the keymgmt we found (if we did), we try to export |locpctx->pkey| + * to it (evp_pkey_export_to_provider() is smart enough to only actually + + * export it if |tmp_keymgmt| is different from |locpctx->pkey|'s keymgmt) + */ + tmp_keymgmt_tofree = tmp_keymgmt = + evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov, + EVP_KEYMGMT_get0_name(locpctx->keymgmt), + locpctx->propquery); + if (tmp_keymgmt != NULL) + provkey = evp_pkey_export_to_provider(locpctx->pkey, locpctx->libctx, + &tmp_keymgmt, locpctx->propquery); + if (tmp_keymgmt == NULL) + EVP_KEYMGMT_free(tmp_keymgmt_tofree); + } + + if (provkey == NULL) { + EVP_SIGNATURE_free(signature); + ERR_clear_last_mark(); + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + + ERR_pop_to_mark(); + + /* No more legacy from here down to legacy: */ + + locpctx->op.sig.signature = signature; + locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX + : EVP_PKEY_OP_SIGNCTX; + locpctx->op.sig.algctx + = signature->newctx(ossl_provider_ctx(signature->prov), props); + if (locpctx->op.sig.algctx == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + + reinitialize: + if (pctx != NULL) + *pctx = locpctx; + + if (type != NULL) { + ctx->reqdigest = type; + if (mdname == NULL) + mdname = canon_mdname(EVP_MD_get0_name(type)); + } else { + if (mdname == NULL && !reinit) { + if (evp_keymgmt_util_get_deflt_digest_name(tmp_keymgmt, provkey, + locmdname, + sizeof(locmdname)) > 0) { + mdname = canon_mdname(locmdname); + } + } + + if (mdname != NULL) { + /* + * We're about to get a new digest so clear anything associated with + * an old digest. + */ + evp_md_ctx_clear_digest(ctx, 1, 0); + + /* legacy code support for engines */ + ERR_set_mark(); + /* + * This might be requested by a later call to EVP_MD_CTX_get0_md(). + * In that case the "explicit fetch" rules apply for that + * function (as per man pages), i.e. the ref count is not updated + * so the EVP_MD should not be used beyond the lifetime of the + * EVP_MD_CTX. + */ + ctx->fetched_digest = EVP_MD_fetch(locpctx->libctx, mdname, props); + if (ctx->fetched_digest != NULL) { + ctx->digest = ctx->reqdigest = ctx->fetched_digest; + } else { + /* legacy engine support : remove the mark when this is deleted */ + ctx->reqdigest = ctx->digest = EVP_get_digestbyname(mdname); + if (ctx->digest == NULL) { + (void)ERR_clear_last_mark(); + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + } + (void)ERR_pop_to_mark(); + } + } + + if (ver) { + if (signature->digest_verify_init == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + ret = signature->digest_verify_init(locpctx->op.sig.algctx, + mdname, provkey, params); + } else { + if (signature->digest_sign_init == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + goto err; + } + ret = signature->digest_sign_init(locpctx->op.sig.algctx, + mdname, provkey, params); + } + + /* + * If the operation was not a success and no digest was found, an error + * needs to be raised. + */ + if (ret > 0 || mdname != NULL) + goto end; + if (type == NULL) /* This check is redundant but clarifies matters */ + ERR_raise(ERR_LIB_EVP, EVP_R_NO_DEFAULT_DIGEST); + + err: + evp_pkey_ctx_free_old_ops(locpctx); + locpctx->operation = EVP_PKEY_OP_UNDEFINED; + EVP_KEYMGMT_free(tmp_keymgmt); + return 0; + + legacy: + /* + * If we don't have the full support we need with provided methods, + * let's go see if legacy does. + */ + ERR_pop_to_mark(); + EVP_KEYMGMT_free(tmp_keymgmt); + tmp_keymgmt = NULL; + + if (type == NULL && mdname != NULL) + type = evp_get_digestbyname_ex(locpctx->libctx, mdname); + + if (ctx->pctx->pmeth == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE); + return 0; + } + + if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) { + + if (type == NULL) { + int def_nid; + if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0) + type = EVP_get_digestbynid(def_nid); + } + + if (type == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_NO_DEFAULT_DIGEST); + return 0; + } + } + + if (ver) { + if (ctx->pctx->pmeth->verifyctx_init) { + if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0) + return 0; + ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX; + } else if (ctx->pctx->pmeth->digestverify != 0) { + ctx->pctx->operation = EVP_PKEY_OP_VERIFY; + ctx->update = update; + } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) { + return 0; + } + } else { + if (ctx->pctx->pmeth->signctx_init) { + if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0) + return 0; + ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX; + } else if (ctx->pctx->pmeth->digestsign != 0) { + ctx->pctx->operation = EVP_PKEY_OP_SIGN; + ctx->update = update; + } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) { + return 0; + } + } + if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0) + return 0; + if (pctx) + *pctx = ctx->pctx; + if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) + return 1; + if (!EVP_DigestInit_ex(ctx, type, e)) + return 0; + /* + * This indicates the current algorithm requires + * special treatment before hashing the tbs-message. + */ + ctx->pctx->flag_call_digest_custom = 0; + if (ctx->pctx->pmeth->digest_custom != NULL) + ctx->pctx->flag_call_digest_custom = 1; + + ret = 1; + + end: +#ifndef FIPS_MODULE + if (ret > 0) + ret = evp_pkey_ctx_use_cached_data(locpctx); +#endif + + EVP_KEYMGMT_free(tmp_keymgmt); + return ret > 0 ? 1 : 0; +} + +int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, + const char *mdname, OSSL_LIB_CTX *libctx, + const char *props, EVP_PKEY *pkey, + const OSSL_PARAM params[]) +{ + return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 0, + params); +} int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, - const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) - { - return do_sigver_init(ctx, pctx, type, e, pkey, 0); - } + const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) +{ + return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 0, + NULL); +} + +int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, + const char *mdname, OSSL_LIB_CTX *libctx, + const char *props, EVP_PKEY *pkey, + const OSSL_PARAM params[]) +{ + return do_sigver_init(ctx, pctx, NULL, mdname, libctx, props, NULL, pkey, 1, + params); +} int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, - const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) - { - return do_sigver_init(ctx, pctx, type, e, pkey, 1); - } - - -int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen) - { - int r; - if (sigret) - { - MS_STATIC EVP_MD_CTX tmp_ctx; - unsigned char md[EVP_MAX_MD_SIZE]; - unsigned int mdlen; - EVP_MD_CTX_init(&tmp_ctx); - if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) - return 0; - if (tmp_ctx.pctx->pmeth->signctx) - r = tmp_ctx.pctx->pmeth->signctx(tmp_ctx.pctx, - sigret, siglen, &tmp_ctx); - else - r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen); - EVP_MD_CTX_cleanup(&tmp_ctx); - if (!r) - return 0; - if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0) - return 0; - } - else - { - if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, NULL, - EVP_MD_size(ctx->digest)) <= 0) - return 0; - } - return 1; - } - -int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, unsigned char *sig, size_t siglen) - { - MS_STATIC EVP_MD_CTX tmp_ctx; - unsigned char md[EVP_MAX_MD_SIZE]; - int r; - unsigned int mdlen; - EVP_MD_CTX_init(&tmp_ctx); - if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) - return -1; - if (tmp_ctx.pctx->pmeth->verifyctx) - { - r = tmp_ctx.pctx->pmeth->verifyctx(tmp_ctx.pctx, - sig, siglen, &tmp_ctx); - } - else - r = EVP_DigestFinal_ex(&tmp_ctx,md,&mdlen); - EVP_MD_CTX_cleanup(&tmp_ctx); - if (!r) - return -1; - return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen); - } + const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) +{ + return do_sigver_init(ctx, pctx, type, NULL, NULL, NULL, e, pkey, 1, + NULL); +} +#endif /* FIPS_MDOE */ + +int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize) +{ + EVP_PKEY_CTX *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); + return 0; + } + + if (pctx == NULL + || pctx->operation != EVP_PKEY_OP_SIGNCTX + || pctx->op.sig.algctx == NULL + || pctx->op.sig.signature == NULL) + goto legacy; + + if (pctx->op.sig.signature->digest_sign_update == NULL) { + ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + + return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.algctx, + data, dsize); + + legacy: + if (pctx != NULL) { + /* do_sigver_init() checked that |digest_custom| is non-NULL */ + if (pctx->flag_call_digest_custom + && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx)) + return 0; + pctx->flag_call_digest_custom = 0; + } + + return EVP_DigestUpdate(ctx, data, dsize); +} + +int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize) +{ + EVP_PKEY_CTX *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); + return 0; + } + + if (pctx == NULL + || pctx->operation != EVP_PKEY_OP_VERIFYCTX + || pctx->op.sig.algctx == NULL + || pctx->op.sig.signature == NULL) + goto legacy; + + if (pctx->op.sig.signature->digest_verify_update == NULL) { + ERR_raise(ERR_LIB_EVP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + + return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.algctx, + data, dsize); + + legacy: + if (pctx != NULL) { + /* do_sigver_init() checked that |digest_custom| is non-NULL */ + if (pctx->flag_call_digest_custom + && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx)) + return 0; + pctx->flag_call_digest_custom = 0; + } + + return EVP_DigestUpdate(ctx, data, dsize); +} + +#ifndef FIPS_MODULE +int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, + size_t *siglen) +{ + int sctx = 0, r = 0; + EVP_PKEY_CTX *dctx = NULL, *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); + return 0; + } + + if (pctx == NULL + || pctx->operation != EVP_PKEY_OP_SIGNCTX + || pctx->op.sig.algctx == NULL + || pctx->op.sig.signature == NULL) + goto legacy; + + if (sigret != NULL && (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) == 0) { + /* try dup */ + dctx = EVP_PKEY_CTX_dup(pctx); + if (dctx != NULL) + pctx = dctx; + } + r = pctx->op.sig.signature->digest_sign_final(pctx->op.sig.algctx, + sigret, siglen, + sigret == NULL ? 0 : *siglen); + if (dctx == NULL && sigret != NULL) + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + else + EVP_PKEY_CTX_free(dctx); + return r; + + legacy: + if (pctx == NULL || pctx->pmeth == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + return 0; + } + + /* do_sigver_init() checked that |digest_custom| is non-NULL */ + if (pctx->flag_call_digest_custom + && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx)) + return 0; + pctx->flag_call_digest_custom = 0; + + if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) { + if (sigret == NULL) + return pctx->pmeth->signctx(pctx, sigret, siglen, ctx); + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISE) != 0) { + r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx); + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + } else { + dctx = EVP_PKEY_CTX_dup(pctx); + if (dctx == NULL) + return 0; + r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx); + EVP_PKEY_CTX_free(dctx); + } + return r; + } + if (pctx->pmeth->signctx != NULL) + sctx = 1; + else + sctx = 0; + if (sigret != NULL) { + unsigned char md[EVP_MAX_MD_SIZE]; + unsigned int mdlen = 0; + + if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) { + if (sctx) + r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx); + else + r = EVP_DigestFinal_ex(ctx, md, &mdlen); + } else { + EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new(); + + if (tmp_ctx == NULL) + return 0; + if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) { + EVP_MD_CTX_free(tmp_ctx); + return 0; + } + if (sctx) + r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx, + sigret, siglen, tmp_ctx); + else + r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen); + EVP_MD_CTX_free(tmp_ctx); + } + if (sctx || !r) + return r; + if (EVP_PKEY_sign(pctx, sigret, siglen, md, mdlen) <= 0) + return 0; + } else { + if (sctx) { + if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0) + return 0; + } else { + int s = EVP_MD_get_size(ctx->digest); + + if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0) + return 0; + } + } + return 1; +} + +int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen, + const unsigned char *tbs, size_t tbslen) +{ + EVP_PKEY_CTX *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); + return 0; + } + + if (pctx != NULL + && pctx->operation == EVP_PKEY_OP_SIGNCTX + && pctx->op.sig.algctx != NULL + && pctx->op.sig.signature != NULL) { + if (pctx->op.sig.signature->digest_sign != NULL) { + if (sigret != NULL) + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + return pctx->op.sig.signature->digest_sign(pctx->op.sig.algctx, + sigret, siglen, + sigret == NULL ? 0 : *siglen, + tbs, tbslen); + } + } else { + /* legacy */ + if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestsign != NULL) + return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen); + } + + if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0) + return 0; + return EVP_DigestSignFinal(ctx, sigret, siglen); +} + +int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig, + size_t siglen) +{ + unsigned char md[EVP_MAX_MD_SIZE]; + int r = 0; + unsigned int mdlen = 0; + int vctx = 0; + EVP_PKEY_CTX *dctx = NULL, *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); + return 0; + } + + if (pctx == NULL + || pctx->operation != EVP_PKEY_OP_VERIFYCTX + || pctx->op.sig.algctx == NULL + || pctx->op.sig.signature == NULL) + goto legacy; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISE) == 0) { + /* try dup */ + dctx = EVP_PKEY_CTX_dup(pctx); + if (dctx != NULL) + pctx = dctx; + } + r = pctx->op.sig.signature->digest_verify_final(pctx->op.sig.algctx, + sig, siglen); + if (dctx == NULL) + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + else + EVP_PKEY_CTX_free(dctx); + return r; + + legacy: + if (pctx == NULL || pctx->pmeth == NULL) { + ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); + return 0; + } + + /* do_sigver_init() checked that |digest_custom| is non-NULL */ + if (pctx->flag_call_digest_custom + && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx)) + return 0; + pctx->flag_call_digest_custom = 0; + + if (pctx->pmeth->verifyctx != NULL) + vctx = 1; + else + vctx = 0; + if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) { + if (vctx) { + r = pctx->pmeth->verifyctx(pctx, sig, siglen, ctx); + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + } else + r = EVP_DigestFinal_ex(ctx, md, &mdlen); + } else { + EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new(); + if (tmp_ctx == NULL) + return -1; + if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) { + EVP_MD_CTX_free(tmp_ctx); + return -1; + } + if (vctx) + r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx, + sig, siglen, tmp_ctx); + else + r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen); + EVP_MD_CTX_free(tmp_ctx); + } + if (vctx || !r) + return r; + return EVP_PKEY_verify(pctx, sig, siglen, md, mdlen); +} + +int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret, + size_t siglen, const unsigned char *tbs, size_t tbslen) +{ + EVP_PKEY_CTX *pctx = ctx->pctx; + + if ((ctx->flags & EVP_MD_CTX_FLAG_FINALISED) != 0) { + ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); + return 0; + } + + if (pctx != NULL + && pctx->operation == EVP_PKEY_OP_VERIFYCTX + && pctx->op.sig.algctx != NULL + && pctx->op.sig.signature != NULL) { + if (pctx->op.sig.signature->digest_verify != NULL) { + ctx->flags |= EVP_MD_CTX_FLAG_FINALISED; + return pctx->op.sig.signature->digest_verify(pctx->op.sig.algctx, + sigret, siglen, + tbs, tbslen); + } + } else { + /* legacy */ + if (ctx->pctx->pmeth != NULL && ctx->pctx->pmeth->digestverify != NULL) + return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen); + } + + if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0) + return -1; + return EVP_DigestVerifyFinal(ctx, sigret, siglen); +} +#endif /* FIPS_MODULE */