| /* |
| * Copyright 2006-2022 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 "internal/cryptlib.h" |
| #include <openssl/evp.h> |
| #include <openssl/objects.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, 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; |
| |
| 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, 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, 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 (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 (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, *pctx = ctx->pctx; |
| |
| 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) |
| return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.algctx, |
| sigret, siglen, |
| sigret == NULL ? 0 : *siglen); |
| dctx = EVP_PKEY_CTX_dup(pctx); |
| if (dctx == NULL) |
| return 0; |
| |
| r = dctx->op.sig.signature->digest_sign_final(dctx->op.sig.algctx, |
| sigret, siglen, |
| *siglen); |
| 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) |
| r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx); |
| 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 (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) |
| 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, *pctx = ctx->pctx; |
| |
| 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) |
| return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.algctx, |
| sig, siglen); |
| dctx = EVP_PKEY_CTX_dup(pctx); |
| if (dctx == NULL) |
| return 0; |
| |
| r = dctx->op.sig.signature->digest_verify_final(dctx->op.sig.algctx, |
| sig, siglen); |
| 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); |
| 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 (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) |
| 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 */ |
