| /* |
| * Copyright 1995-2022 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 |
| */ |
| |
| /* We need to use some engine deprecated APIs */ |
| #define OPENSSL_SUPPRESS_DEPRECATED |
| |
| #include <stdio.h> |
| #include <openssl/objects.h> |
| #include <openssl/evp.h> |
| #include <openssl/ec.h> |
| #ifndef FIPS_MODULE |
| # include <openssl/engine.h> |
| #endif |
| #include <openssl/params.h> |
| #include <openssl/core_names.h> |
| #include "internal/cryptlib.h" |
| #include "internal/provider.h" |
| #include "internal/core.h" |
| #include "crypto/evp.h" |
| #include "evp_local.h" |
| |
| static void cleanup_old_md_data(EVP_MD_CTX *ctx, int force) |
| { |
| if (ctx->digest != NULL) { |
| if (ctx->digest->cleanup != NULL |
| && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED)) |
| ctx->digest->cleanup(ctx); |
| if (ctx->md_data != NULL && ctx->digest->ctx_size > 0 |
| && (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE) |
| || force)) { |
| OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size); |
| ctx->md_data = NULL; |
| } |
| } |
| } |
| |
| void evp_md_ctx_clear_digest(EVP_MD_CTX *ctx, int force, int keep_fetched) |
| { |
| if (ctx->algctx != NULL) { |
| if (ctx->digest != NULL && ctx->digest->freectx != NULL) |
| ctx->digest->freectx(ctx->algctx); |
| ctx->algctx = NULL; |
| EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
| } |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| |
| /* |
| * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because |
| * sometimes only copies of the context are ever finalised. |
| */ |
| cleanup_old_md_data(ctx, force); |
| if (force) |
| ctx->digest = NULL; |
| |
| #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE) |
| ENGINE_finish(ctx->engine); |
| ctx->engine = NULL; |
| #endif |
| |
| /* Non legacy code, this has to be later than the ctx->digest cleaning */ |
| if (!keep_fetched) { |
| EVP_MD_free(ctx->fetched_digest); |
| ctx->fetched_digest = NULL; |
| ctx->reqdigest = NULL; |
| } |
| } |
| |
| static int evp_md_ctx_reset_ex(EVP_MD_CTX *ctx, int keep_fetched) |
| { |
| if (ctx == NULL) |
| return 1; |
| |
| #ifndef FIPS_MODULE |
| /* |
| * pctx should be freed by the user of EVP_MD_CTX |
| * if EVP_MD_CTX_FLAG_KEEP_PKEY_CTX is set |
| */ |
| if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX)) { |
| EVP_PKEY_CTX_free(ctx->pctx); |
| ctx->pctx = NULL; |
| } |
| #endif |
| |
| evp_md_ctx_clear_digest(ctx, 0, keep_fetched); |
| if (!keep_fetched) |
| OPENSSL_cleanse(ctx, sizeof(*ctx)); |
| |
| return 1; |
| } |
| |
| /* This call frees resources associated with the context */ |
| int EVP_MD_CTX_reset(EVP_MD_CTX *ctx) |
| { |
| return evp_md_ctx_reset_ex(ctx, 0); |
| } |
| |
| #ifndef FIPS_MODULE |
| EVP_MD_CTX *evp_md_ctx_new_ex(EVP_PKEY *pkey, const ASN1_OCTET_STRING *id, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| EVP_MD_CTX *ctx; |
| EVP_PKEY_CTX *pctx = NULL; |
| |
| if ((ctx = EVP_MD_CTX_new()) == NULL |
| || (pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq)) == NULL) { |
| ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (id != NULL && EVP_PKEY_CTX_set1_id(pctx, id->data, id->length) <= 0) |
| goto err; |
| |
| EVP_MD_CTX_set_pkey_ctx(ctx, pctx); |
| return ctx; |
| |
| err: |
| EVP_PKEY_CTX_free(pctx); |
| EVP_MD_CTX_free(ctx); |
| return NULL; |
| } |
| #endif |
| |
| EVP_MD_CTX *EVP_MD_CTX_new(void) |
| { |
| return OPENSSL_zalloc(sizeof(EVP_MD_CTX)); |
| } |
| |
| void EVP_MD_CTX_free(EVP_MD_CTX *ctx) |
| { |
| if (ctx == NULL) |
| return; |
| |
| EVP_MD_CTX_reset(ctx); |
| OPENSSL_free(ctx); |
| } |
| |
| int evp_md_ctx_free_algctx(EVP_MD_CTX *ctx) |
| { |
| if (ctx->algctx != NULL) { |
| if (!ossl_assert(ctx->digest != NULL)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| if (ctx->digest->freectx != NULL) |
| ctx->digest->freectx(ctx->algctx); |
| ctx->algctx = NULL; |
| } |
| return 1; |
| } |
| |
| static int evp_md_init_internal(EVP_MD_CTX *ctx, const EVP_MD *type, |
| const OSSL_PARAM params[], ENGINE *impl) |
| { |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| ENGINE *tmpimpl = NULL; |
| #endif |
| |
| #if !defined(FIPS_MODULE) |
| if (ctx->pctx != NULL |
| && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx) |
| && ctx->pctx->op.sig.algctx != NULL) { |
| /* |
| * Prior to OpenSSL 3.0 calling EVP_DigestInit_ex() on an mdctx |
| * previously initialised with EVP_DigestSignInit() would retain |
| * information about the key, and re-initialise for another sign |
| * operation. So in that case we redirect to EVP_DigestSignInit() |
| */ |
| if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| return EVP_DigestSignInit(ctx, NULL, type, impl, NULL); |
| if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX) |
| return EVP_DigestVerifyInit(ctx, NULL, type, impl, NULL); |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| #endif |
| |
| EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
| |
| if (type != NULL) { |
| ctx->reqdigest = type; |
| } else { |
| if (ctx->digest == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NO_DIGEST_SET); |
| return 0; |
| } |
| type = ctx->digest; |
| } |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| /* |
| * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so |
| * this context may already have an ENGINE! Try to avoid releasing the |
| * previous handle, re-querying for an ENGINE, and having a |
| * reinitialisation, when it may all be unnecessary. |
| */ |
| if (ctx->engine != NULL |
| && ctx->digest != NULL |
| && type->type == ctx->digest->type) |
| goto skip_to_init; |
| |
| /* |
| * Ensure an ENGINE left lying around from last time is cleared (the |
| * previous check attempted to avoid this if the same ENGINE and |
| * EVP_MD could be used). |
| */ |
| ENGINE_finish(ctx->engine); |
| ctx->engine = NULL; |
| |
| if (impl == NULL) |
| tmpimpl = ENGINE_get_digest_engine(type->type); |
| #endif |
| |
| /* |
| * If there are engines involved or EVP_MD_CTX_FLAG_NO_INIT is set then we |
| * should use legacy handling for now. |
| */ |
| if (impl != NULL |
| #if !defined(OPENSSL_NO_ENGINE) |
| || ctx->engine != NULL |
| # if !defined(FIPS_MODULE) |
| || tmpimpl != NULL |
| # endif |
| #endif |
| || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0 |
| || type->origin == EVP_ORIG_METH) { |
| /* If we were using provided hash before, cleanup algctx */ |
| if (!evp_md_ctx_free_algctx(ctx)) |
| return 0; |
| |
| if (ctx->digest == ctx->fetched_digest) |
| ctx->digest = NULL; |
| EVP_MD_free(ctx->fetched_digest); |
| ctx->fetched_digest = NULL; |
| goto legacy; |
| } |
| |
| cleanup_old_md_data(ctx, 1); |
| |
| /* Start of non-legacy code below */ |
| if (ctx->digest != type && !evp_md_ctx_free_algctx(ctx)) |
| return 0; |
| |
| if (type->prov == NULL) { |
| #ifdef FIPS_MODULE |
| /* We only do explicit fetches inside the FIPS module */ |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| #else |
| /* The NULL digest is a special case */ |
| EVP_MD *provmd = EVP_MD_fetch(NULL, |
| type->type != NID_undef ? OBJ_nid2sn(type->type) |
| : "NULL", ""); |
| |
| if (provmd == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| type = provmd; |
| EVP_MD_free(ctx->fetched_digest); |
| ctx->fetched_digest = provmd; |
| #endif |
| } |
| |
| if (type->prov != NULL && ctx->fetched_digest != type) { |
| if (!EVP_MD_up_ref((EVP_MD *)type)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| EVP_MD_free(ctx->fetched_digest); |
| ctx->fetched_digest = (EVP_MD *)type; |
| } |
| ctx->digest = type; |
| if (ctx->algctx == NULL) { |
| ctx->algctx = ctx->digest->newctx(ossl_provider_ctx(type->prov)); |
| if (ctx->algctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| } |
| |
| if (ctx->digest->dinit == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| |
| return ctx->digest->dinit(ctx->algctx, params); |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| if (type) { |
| if (impl != NULL) { |
| if (!ENGINE_init(impl)) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| return 0; |
| } |
| } else { |
| /* Ask if an ENGINE is reserved for this job */ |
| impl = tmpimpl; |
| } |
| if (impl != NULL) { |
| /* There's an ENGINE for this job ... (apparently) */ |
| const EVP_MD *d = ENGINE_get_digest(impl, type->type); |
| |
| if (d == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR); |
| ENGINE_finish(impl); |
| return 0; |
| } |
| /* We'll use the ENGINE's private digest definition */ |
| type = d; |
| /* |
| * Store the ENGINE functional reference so we know 'type' came |
| * from an ENGINE and we need to release it when done. |
| */ |
| ctx->engine = impl; |
| } else |
| ctx->engine = NULL; |
| } |
| #endif |
| if (ctx->digest != type) { |
| cleanup_old_md_data(ctx, 1); |
| |
| ctx->digest = type; |
| if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) { |
| ctx->update = type->update; |
| ctx->md_data = OPENSSL_zalloc(type->ctx_size); |
| if (ctx->md_data == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| } |
| } |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| skip_to_init: |
| #endif |
| #ifndef FIPS_MODULE |
| if (ctx->pctx != NULL |
| && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx) |
| || ctx->pctx->op.sig.signature == NULL)) { |
| int r; |
| r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, |
| EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); |
| if (r <= 0 && (r != -2)) |
| return 0; |
| } |
| #endif |
| if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) |
| return 1; |
| return ctx->digest->init(ctx); |
| } |
| |
| int EVP_DigestInit_ex2(EVP_MD_CTX *ctx, const EVP_MD *type, |
| const OSSL_PARAM params[]) |
| { |
| return evp_md_init_internal(ctx, type, params, NULL); |
| } |
| |
| int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) |
| { |
| EVP_MD_CTX_reset(ctx); |
| return evp_md_init_internal(ctx, type, NULL, NULL); |
| } |
| |
| int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) |
| { |
| return evp_md_init_internal(ctx, type, NULL, impl); |
| } |
| |
| int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) |
| { |
| if (count == 0) |
| return 1; |
| |
| if (ctx->pctx != NULL |
| && EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx->pctx) |
| && ctx->pctx->op.sig.algctx != NULL) { |
| /* |
| * Prior to OpenSSL 3.0 EVP_DigestSignUpdate() and |
| * EVP_DigestVerifyUpdate() were just macros for EVP_DigestUpdate(). |
| * Some code calls EVP_DigestUpdate() directly even when initialised |
| * with EVP_DigestSignInit_ex() or |
| * EVP_DigestVerifyInit_ex(), so we detect that and redirect to |
| * the correct EVP_Digest*Update() function |
| */ |
| if (ctx->pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| return EVP_DigestSignUpdate(ctx, data, count); |
| if (ctx->pctx->operation == EVP_PKEY_OP_VERIFYCTX) |
| return EVP_DigestVerifyUpdate(ctx, data, count); |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| |
| if (ctx->digest == NULL |
| || ctx->digest->prov == NULL |
| || (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) |
| goto legacy; |
| |
| if (ctx->digest->dupdate == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR); |
| return 0; |
| } |
| return ctx->digest->dupdate(ctx->algctx, data, count); |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| return ctx->update(ctx, data, count); |
| } |
| |
| /* The caller can assume that this removes any secret data from the context */ |
| int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) |
| { |
| int ret; |
| ret = EVP_DigestFinal_ex(ctx, md, size); |
| EVP_MD_CTX_reset(ctx); |
| return ret; |
| } |
| |
| /* The caller can assume that this removes any secret data from the context */ |
| int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *isize) |
| { |
| int ret, sz; |
| size_t size = 0; |
| size_t mdsize = 0; |
| |
| if (ctx->digest == NULL) |
| return 0; |
| |
| sz = EVP_MD_get_size(ctx->digest); |
| if (sz < 0) |
| return 0; |
| mdsize = sz; |
| if (ctx->digest->prov == NULL) |
| goto legacy; |
| |
| if (ctx->digest->dfinal == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| |
| ret = ctx->digest->dfinal(ctx->algctx, md, &size, mdsize); |
| |
| if (isize != NULL) { |
| if (size <= UINT_MAX) { |
| *isize = (int)size; |
| } else { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| ret = 0; |
| } |
| } |
| |
| return ret; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| OPENSSL_assert(mdsize <= EVP_MAX_MD_SIZE); |
| ret = ctx->digest->final(ctx, md); |
| if (isize != NULL) |
| *isize = mdsize; |
| if (ctx->digest->cleanup) { |
| ctx->digest->cleanup(ctx); |
| EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
| } |
| OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
| return ret; |
| } |
| |
| int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md, size_t size) |
| { |
| int ret = 0; |
| OSSL_PARAM params[2]; |
| size_t i = 0; |
| |
| if (ctx->digest == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_NULL_ALGORITHM); |
| return 0; |
| } |
| |
| if (ctx->digest->prov == NULL) |
| goto legacy; |
| |
| if (ctx->digest->dfinal == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR); |
| return 0; |
| } |
| |
| params[i++] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &size); |
| params[i++] = OSSL_PARAM_construct_end(); |
| |
| if (EVP_MD_CTX_set_params(ctx, params) > 0) |
| ret = ctx->digest->dfinal(ctx->algctx, md, &size, size); |
| |
| return ret; |
| |
| legacy: |
| if (ctx->digest->flags & EVP_MD_FLAG_XOF |
| && size <= INT_MAX |
| && ctx->digest->md_ctrl(ctx, EVP_MD_CTRL_XOF_LEN, (int)size, NULL)) { |
| ret = ctx->digest->final(ctx, md); |
| if (ctx->digest->cleanup != NULL) { |
| ctx->digest->cleanup(ctx); |
| EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); |
| } |
| OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); |
| } else { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_XOF_OR_INVALID_LENGTH); |
| } |
| |
| return ret; |
| } |
| |
| EVP_MD_CTX *EVP_MD_CTX_dup(const EVP_MD_CTX *in) |
| { |
| EVP_MD_CTX *out = EVP_MD_CTX_new(); |
| |
| if (out != NULL && !EVP_MD_CTX_copy_ex(out, in)) { |
| EVP_MD_CTX_free(out); |
| out = NULL; |
| } |
| return out; |
| } |
| |
| int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
| { |
| EVP_MD_CTX_reset(out); |
| return EVP_MD_CTX_copy_ex(out, in); |
| } |
| |
| int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) |
| { |
| int digest_change = 0; |
| unsigned char *tmp_buf; |
| |
| if (in == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| if (in->digest == NULL) { |
| /* copying uninitialized digest context */ |
| EVP_MD_CTX_reset(out); |
| if (out->fetched_digest != NULL) |
| EVP_MD_free(out->fetched_digest); |
| *out = *in; |
| goto clone_pkey; |
| } |
| |
| if (in->digest->prov == NULL |
| || (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0) |
| goto legacy; |
| |
| if (in->digest->dupctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
| return 0; |
| } |
| |
| evp_md_ctx_reset_ex(out, 1); |
| digest_change = (out->fetched_digest != in->fetched_digest); |
| if (digest_change && out->fetched_digest != NULL) |
| EVP_MD_free(out->fetched_digest); |
| *out = *in; |
| /* NULL out pointers in case of error */ |
| out->pctx = NULL; |
| out->algctx = NULL; |
| |
| if (digest_change && in->fetched_digest != NULL) |
| EVP_MD_up_ref(in->fetched_digest); |
| |
| if (in->algctx != NULL) { |
| out->algctx = in->digest->dupctx(in->algctx); |
| if (out->algctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
| return 0; |
| } |
| } |
| |
| clone_pkey: |
| /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */ |
| EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); |
| #ifndef FIPS_MODULE |
| if (in->pctx != NULL) { |
| out->pctx = EVP_PKEY_CTX_dup(in->pctx); |
| if (out->pctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX); |
| EVP_MD_CTX_reset(out); |
| return 0; |
| } |
| } |
| #endif |
| |
| return 1; |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE) |
| /* Make sure it's safe to copy a digest context using an ENGINE */ |
| if (in->engine && !ENGINE_init(in->engine)) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB); |
| return 0; |
| } |
| #endif |
| |
| if (out->digest == in->digest) { |
| tmp_buf = out->md_data; |
| EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE); |
| } else |
| tmp_buf = NULL; |
| EVP_MD_CTX_reset(out); |
| memcpy(out, in, sizeof(*out)); |
| |
| /* copied EVP_MD_CTX should free the copied EVP_PKEY_CTX */ |
| EVP_MD_CTX_clear_flags(out, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX); |
| |
| /* Null these variables, since they are getting fixed up |
| * properly below. Anything else may cause a memleak and/or |
| * double free if any of the memory allocations below fail |
| */ |
| out->md_data = NULL; |
| out->pctx = NULL; |
| |
| if (in->md_data && out->digest->ctx_size) { |
| if (tmp_buf) |
| out->md_data = tmp_buf; |
| else { |
| out->md_data = OPENSSL_malloc(out->digest->ctx_size); |
| if (out->md_data == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| } |
| memcpy(out->md_data, in->md_data, out->digest->ctx_size); |
| } |
| |
| out->update = in->update; |
| |
| #ifndef FIPS_MODULE |
| if (in->pctx) { |
| out->pctx = EVP_PKEY_CTX_dup(in->pctx); |
| if (!out->pctx) { |
| EVP_MD_CTX_reset(out); |
| return 0; |
| } |
| } |
| #endif |
| |
| if (out->digest->copy) |
| return out->digest->copy(out, in); |
| |
| return 1; |
| } |
| |
| int EVP_Digest(const void *data, size_t count, |
| unsigned char *md, unsigned int *size, const EVP_MD *type, |
| ENGINE *impl) |
| { |
| EVP_MD_CTX *ctx = EVP_MD_CTX_new(); |
| int ret; |
| |
| if (ctx == NULL) |
| return 0; |
| EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_ONESHOT); |
| ret = EVP_DigestInit_ex(ctx, type, impl) |
| && EVP_DigestUpdate(ctx, data, count) |
| && EVP_DigestFinal_ex(ctx, md, size); |
| EVP_MD_CTX_free(ctx); |
| |
| return ret; |
| } |
| |
| int EVP_Q_digest(OSSL_LIB_CTX *libctx, const char *name, const char *propq, |
| const void *data, size_t datalen, |
| unsigned char *md, size_t *mdlen) |
| { |
| EVP_MD *digest = EVP_MD_fetch(libctx, name, propq); |
| unsigned int temp = 0; |
| int ret = 0; |
| |
| if (digest != NULL) { |
| ret = EVP_Digest(data, datalen, md, &temp, digest, NULL); |
| EVP_MD_free(digest); |
| } |
| if (mdlen != NULL) |
| *mdlen = temp; |
| return ret; |
| } |
| |
| int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[]) |
| { |
| if (digest != NULL && digest->get_params != NULL) |
| return digest->get_params(params); |
| return 0; |
| } |
| |
| const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest) |
| { |
| if (digest != NULL && digest->gettable_params != NULL) |
| return digest->gettable_params( |
| ossl_provider_ctx(EVP_MD_get0_provider(digest))); |
| return NULL; |
| } |
| |
| int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[]) |
| { |
| EVP_PKEY_CTX *pctx = ctx->pctx; |
| |
| /* If we have a pctx then we should try that first */ |
| if (pctx != NULL |
| && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
| || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| && pctx->op.sig.algctx != NULL |
| && pctx->op.sig.signature->set_ctx_md_params != NULL) |
| return pctx->op.sig.signature->set_ctx_md_params(pctx->op.sig.algctx, |
| params); |
| |
| if (ctx->digest != NULL && ctx->digest->set_ctx_params != NULL) |
| return ctx->digest->set_ctx_params(ctx->algctx, params); |
| |
| return 0; |
| } |
| |
| const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md) |
| { |
| void *provctx; |
| |
| if (md != NULL && md->settable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_MD_get0_provider(md)); |
| return md->settable_ctx_params(NULL, provctx); |
| } |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx) |
| { |
| EVP_PKEY_CTX *pctx; |
| void *alg; |
| |
| if (ctx == NULL) |
| return NULL; |
| |
| /* If we have a pctx then we should try that first */ |
| pctx = ctx->pctx; |
| if (pctx != NULL |
| && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
| || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| && pctx->op.sig.algctx != NULL |
| && pctx->op.sig.signature->settable_ctx_md_params != NULL) |
| return pctx->op.sig.signature->settable_ctx_md_params( |
| pctx->op.sig.algctx); |
| |
| if (ctx->digest != NULL && ctx->digest->settable_ctx_params != NULL) { |
| alg = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest)); |
| return ctx->digest->settable_ctx_params(ctx->algctx, alg); |
| } |
| |
| return NULL; |
| } |
| |
| int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[]) |
| { |
| EVP_PKEY_CTX *pctx = ctx->pctx; |
| |
| /* If we have a pctx then we should try that first */ |
| if (pctx != NULL |
| && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
| || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| && pctx->op.sig.algctx != NULL |
| && pctx->op.sig.signature->get_ctx_md_params != NULL) |
| return pctx->op.sig.signature->get_ctx_md_params(pctx->op.sig.algctx, |
| params); |
| |
| if (ctx->digest != NULL && ctx->digest->get_params != NULL) |
| return ctx->digest->get_ctx_params(ctx->algctx, params); |
| |
| return 0; |
| } |
| |
| const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md) |
| { |
| void *provctx; |
| |
| if (md != NULL && md->gettable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_MD_get0_provider(md)); |
| return md->gettable_ctx_params(NULL, provctx); |
| } |
| return NULL; |
| } |
| |
| const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx) |
| { |
| EVP_PKEY_CTX *pctx; |
| void *provctx; |
| |
| if (ctx == NULL) |
| return NULL; |
| |
| /* If we have a pctx then we should try that first */ |
| pctx = ctx->pctx; |
| if (pctx != NULL |
| && (pctx->operation == EVP_PKEY_OP_VERIFYCTX |
| || pctx->operation == EVP_PKEY_OP_SIGNCTX) |
| && pctx->op.sig.algctx != NULL |
| && pctx->op.sig.signature->gettable_ctx_md_params != NULL) |
| return pctx->op.sig.signature->gettable_ctx_md_params( |
| pctx->op.sig.algctx); |
| |
| if (ctx->digest != NULL && ctx->digest->gettable_ctx_params != NULL) { |
| provctx = ossl_provider_ctx(EVP_MD_get0_provider(ctx->digest)); |
| return ctx->digest->gettable_ctx_params(ctx->algctx, provctx); |
| } |
| return NULL; |
| } |
| |
| int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2) |
| { |
| int ret = EVP_CTRL_RET_UNSUPPORTED; |
| int set_params = 1; |
| size_t sz; |
| OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; |
| |
| if (ctx == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| if (ctx->digest != NULL && ctx->digest->prov == NULL) |
| goto legacy; |
| |
| switch (cmd) { |
| case EVP_MD_CTRL_XOF_LEN: |
| sz = (size_t)p1; |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_XOFLEN, &sz); |
| break; |
| case EVP_MD_CTRL_MICALG: |
| set_params = 0; |
| params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DIGEST_PARAM_MICALG, |
| p2, p1 ? p1 : 9999); |
| break; |
| case EVP_CTRL_SSL3_MASTER_SECRET: |
| params[0] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS, |
| p2, p1); |
| break; |
| default: |
| goto conclude; |
| } |
| |
| if (set_params) |
| ret = EVP_MD_CTX_set_params(ctx, params); |
| else |
| ret = EVP_MD_CTX_get_params(ctx, params); |
| goto conclude; |
| |
| |
| /* Code below to be removed when legacy support is dropped. */ |
| legacy: |
| if (ctx->digest->md_ctrl == NULL) { |
| ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED); |
| return 0; |
| } |
| |
| ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2); |
| conclude: |
| if (ret <= 0) |
| return 0; |
| return ret; |
| } |
| |
| EVP_MD *evp_md_new(void) |
| { |
| EVP_MD *md = OPENSSL_zalloc(sizeof(*md)); |
| |
| if (md != NULL) { |
| md->lock = CRYPTO_THREAD_lock_new(); |
| if (md->lock == NULL) { |
| OPENSSL_free(md); |
| return NULL; |
| } |
| md->refcnt = 1; |
| } |
| return md; |
| } |
| |
| /* |
| * FIPS module note: since internal fetches will be entirely |
| * provider based, we know that none of its code depends on legacy |
| * NIDs or any functionality that use them. |
| */ |
| #ifndef FIPS_MODULE |
| static void set_legacy_nid(const char *name, void *vlegacy_nid) |
| { |
| int nid; |
| int *legacy_nid = vlegacy_nid; |
| /* |
| * We use lowest level function to get the associated method, because |
| * higher level functions such as EVP_get_digestbyname() have changed |
| * to look at providers too. |
| */ |
| const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH); |
| |
| if (*legacy_nid == -1) /* We found a clash already */ |
| return; |
| |
| if (legacy_method == NULL) |
| return; |
| nid = EVP_MD_nid(legacy_method); |
| if (*legacy_nid != NID_undef && *legacy_nid != nid) { |
| *legacy_nid = -1; |
| return; |
| } |
| *legacy_nid = nid; |
| } |
| #endif |
| |
| static int evp_md_cache_constants(EVP_MD *md) |
| { |
| int ok, xof = 0, algid_absent = 0; |
| size_t blksz = 0; |
| size_t mdsize = 0; |
| OSSL_PARAM params[5]; |
| |
| params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &blksz); |
| params[1] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &mdsize); |
| params[2] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_XOF, &xof); |
| params[3] = OSSL_PARAM_construct_int(OSSL_DIGEST_PARAM_ALGID_ABSENT, |
| &algid_absent); |
| params[4] = OSSL_PARAM_construct_end(); |
| ok = evp_do_md_getparams(md, params) > 0; |
| if (mdsize > INT_MAX || blksz > INT_MAX) |
| ok = 0; |
| if (ok) { |
| md->block_size = (int)blksz; |
| md->md_size = (int)mdsize; |
| if (xof) |
| md->flags |= EVP_MD_FLAG_XOF; |
| if (algid_absent) |
| md->flags |= EVP_MD_FLAG_DIGALGID_ABSENT; |
| } |
| return ok; |
| } |
| |
| static void *evp_md_from_algorithm(int name_id, |
| const OSSL_ALGORITHM *algodef, |
| OSSL_PROVIDER *prov) |
| { |
| const OSSL_DISPATCH *fns = algodef->implementation; |
| EVP_MD *md = NULL; |
| int fncnt = 0; |
| |
| /* EVP_MD_fetch() will set the legacy NID if available */ |
| if ((md = evp_md_new()) == NULL) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| |
| #ifndef FIPS_MODULE |
| md->type = NID_undef; |
| if (!evp_names_do_all(prov, name_id, set_legacy_nid, &md->type) |
| || md->type == -1) { |
| ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR); |
| EVP_MD_free(md); |
| return NULL; |
| } |
| #endif |
| |
| md->name_id = name_id; |
| if ((md->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { |
| EVP_MD_free(md); |
| return NULL; |
| } |
| md->description = algodef->algorithm_description; |
| |
| for (; fns->function_id != 0; fns++) { |
| switch (fns->function_id) { |
| case OSSL_FUNC_DIGEST_NEWCTX: |
| if (md->newctx == NULL) { |
| md->newctx = OSSL_FUNC_digest_newctx(fns); |
| fncnt++; |
| } |
| break; |
| case OSSL_FUNC_DIGEST_INIT: |
| if (md->dinit == NULL) { |
| md->dinit = OSSL_FUNC_digest_init(fns); |
| fncnt++; |
| } |
| break; |
| case OSSL_FUNC_DIGEST_UPDATE: |
| if (md->dupdate == NULL) { |
| md->dupdate = OSSL_FUNC_digest_update(fns); |
| fncnt++; |
| } |
| break; |
| case OSSL_FUNC_DIGEST_FINAL: |
| if (md->dfinal == NULL) { |
| md->dfinal = OSSL_FUNC_digest_final(fns); |
| fncnt++; |
| } |
| break; |
| case OSSL_FUNC_DIGEST_DIGEST: |
| if (md->digest == NULL) |
| md->digest = OSSL_FUNC_digest_digest(fns); |
| /* We don't increment fnct for this as it is stand alone */ |
| break; |
| case OSSL_FUNC_DIGEST_FREECTX: |
| if (md->freectx == NULL) { |
| md->freectx = OSSL_FUNC_digest_freectx(fns); |
| fncnt++; |
| } |
| break; |
| case OSSL_FUNC_DIGEST_DUPCTX: |
| if (md->dupctx == NULL) |
| md->dupctx = OSSL_FUNC_digest_dupctx(fns); |
| break; |
| case OSSL_FUNC_DIGEST_GET_PARAMS: |
| if (md->get_params == NULL) |
| md->get_params = OSSL_FUNC_digest_get_params(fns); |
| break; |
| case OSSL_FUNC_DIGEST_SET_CTX_PARAMS: |
| if (md->set_ctx_params == NULL) |
| md->set_ctx_params = OSSL_FUNC_digest_set_ctx_params(fns); |
| break; |
| case OSSL_FUNC_DIGEST_GET_CTX_PARAMS: |
| if (md->get_ctx_params == NULL) |
| md->get_ctx_params = OSSL_FUNC_digest_get_ctx_params(fns); |
| break; |
| case OSSL_FUNC_DIGEST_GETTABLE_PARAMS: |
| if (md->gettable_params == NULL) |
| md->gettable_params = OSSL_FUNC_digest_gettable_params(fns); |
| break; |
| case OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS: |
| if (md->settable_ctx_params == NULL) |
| md->settable_ctx_params = |
| OSSL_FUNC_digest_settable_ctx_params(fns); |
| break; |
| case OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS: |
| if (md->gettable_ctx_params == NULL) |
| md->gettable_ctx_params = |
| OSSL_FUNC_digest_gettable_ctx_params(fns); |
| break; |
| } |
| } |
| if ((fncnt != 0 && fncnt != 5) |
| || (fncnt == 0 && md->digest == NULL)) { |
| /* |
| * In order to be a consistent set of functions we either need the |
| * whole set of init/update/final etc functions or none of them. |
| * The "digest" function can standalone. We at least need one way to |
| * generate digests. |
| */ |
| EVP_MD_free(md); |
| ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); |
| return NULL; |
| } |
| md->prov = prov; |
| if (prov != NULL) |
| ossl_provider_up_ref(prov); |
| |
| if (!evp_md_cache_constants(md)) { |
| EVP_MD_free(md); |
| ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED); |
| md = NULL; |
| } |
| |
| return md; |
| } |
| |
| static int evp_md_up_ref(void *md) |
| { |
| return EVP_MD_up_ref(md); |
| } |
| |
| static void evp_md_free(void *md) |
| { |
| EVP_MD_free(md); |
| } |
| |
| EVP_MD *EVP_MD_fetch(OSSL_LIB_CTX *ctx, const char *algorithm, |
| const char *properties) |
| { |
| EVP_MD *md = |
| evp_generic_fetch(ctx, OSSL_OP_DIGEST, algorithm, properties, |
| evp_md_from_algorithm, evp_md_up_ref, evp_md_free); |
| |
| return md; |
| } |
| |
| int EVP_MD_up_ref(EVP_MD *md) |
| { |
| int ref = 0; |
| |
| if (md->origin == EVP_ORIG_DYNAMIC) |
| CRYPTO_UP_REF(&md->refcnt, &ref, md->lock); |
| return 1; |
| } |
| |
| void EVP_MD_free(EVP_MD *md) |
| { |
| int i; |
| |
| if (md == NULL || md->origin != EVP_ORIG_DYNAMIC) |
| return; |
| |
| CRYPTO_DOWN_REF(&md->refcnt, &i, md->lock); |
| if (i > 0) |
| return; |
| evp_md_free_int(md); |
| } |
| |
| void EVP_MD_do_all_provided(OSSL_LIB_CTX *libctx, |
| void (*fn)(EVP_MD *mac, void *arg), |
| void *arg) |
| { |
| evp_generic_do_all(libctx, OSSL_OP_DIGEST, |
| (void (*)(void *, void *))fn, arg, |
| evp_md_from_algorithm, evp_md_up_ref, evp_md_free); |
| } |
