-/* crypto/evp/digest.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2001 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
- * openssl-core@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 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (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 "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
+#include "internal/evp_int.h"
+#include "evp_locl.h"
-void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
- {
- memset(ctx,'\0',sizeof *ctx);
- }
+/* This call frees resources associated with the context */
+int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
+{
+ if (ctx == NULL)
+ return 1;
-EVP_MD_CTX *EVP_MD_CTX_create(void)
- {
- EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
+ /*
+ * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because
+ * sometimes only copies of the context are ever finalised.
+ */
+ if (ctx->digest && ctx->digest->cleanup
+ && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))
+ ctx->digest->cleanup(ctx);
+ if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
+ && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
+ OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
+ }
+ /*
+ * pctx should be freed by the user of EVP_MD_CTX
+ * if EVP_MD_CTX_FLAG_NEGLECT_PCTX is set
+ */
+ if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_NEGLECT_PCTX))
+ EVP_PKEY_CTX_free(ctx->pctx);
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(ctx->engine);
+#endif
+ OPENSSL_cleanse(ctx, sizeof(*ctx));
- EVP_MD_CTX_init(ctx);
+ return 1;
+}
- return ctx;
- }
+EVP_MD_CTX *EVP_MD_CTX_new(void)
+{
+ return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
+}
+
+void EVP_MD_CTX_free(EVP_MD_CTX *ctx)
+{
+ EVP_MD_CTX_reset(ctx);
+ OPENSSL_free(ctx);
+}
int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
- {
- EVP_MD_CTX_init(ctx);
- return EVP_DigestInit_ex(ctx, type, NULL);
- }
+{
+ EVP_MD_CTX_reset(ctx);
+ return EVP_DigestInit_ex(ctx, type, NULL);
+}
int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
- {
- EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
- /* 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 unecessary. */
- if (ctx->engine && ctx->digest && (!type ||
- (type && (type->type == ctx->digest->type))))
- goto skip_to_init;
- if (type)
- {
- /* 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). */
- if(ctx->engine)
- ENGINE_finish(ctx->engine);
- if(impl)
- {
- if (!ENGINE_init(impl))
- {
- EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_INITIALIZATION_ERROR);
- return 0;
- }
- }
- else
- /* Ask if an ENGINE is reserved for this job */
- impl = ENGINE_get_digest_engine(type->type);
- if(impl)
- {
- /* There's an ENGINE for this job ... (apparently) */
- const EVP_MD *d = ENGINE_get_digest(impl, type->type);
- if(!d)
- {
- /* Same comment from evp_enc.c */
- EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_INITIALIZATION_ERROR);
- 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;
- }
- else if(!ctx->digest)
- {
- EVPerr(EVP_F_EVP_DIGESTINIT, EVP_R_NO_DIGEST_SET);
- return 0;
- }
- if (ctx->digest != type)
- {
- if (ctx->digest && ctx->digest->ctx_size)
- OPENSSL_free(ctx->md_data);
- ctx->digest=type;
- if (type->ctx_size)
- ctx->md_data=OPENSSL_malloc(type->ctx_size);
- }
-skip_to_init:
- return ctx->digest->init(ctx);
- }
+{
+ EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);
+#ifndef OPENSSL_NO_ENGINE
+ /*
+ * 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 && ctx->digest &&
+ (type == NULL || (type->type == ctx->digest->type)))
+ goto skip_to_init;
+ if (type) {
+ /*
+ * 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);
+ if (impl != NULL) {
+ if (!ENGINE_init(impl)) {
+ EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR);
+ return 0;
+ }
+ } else {
+ /* Ask if an ENGINE is reserved for this job */
+ impl = ENGINE_get_digest_engine(type->type);
+ }
+ if (impl != NULL) {
+ /* There's an ENGINE for this job ... (apparently) */
+ const EVP_MD *d = ENGINE_get_digest(impl, type->type);
+
+ if (d == NULL) {
+ EVPerr(EVP_F_EVP_DIGESTINIT_EX, 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;
+ } else {
+ if (!ctx->digest) {
+ EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET);
+ return 0;
+ }
+ type = ctx->digest;
+ }
+#endif
+ if (ctx->digest != type) {
+ if (ctx->digest && ctx->digest->ctx_size) {
+ OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
+ ctx->md_data = NULL;
+ }
+ 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) {
+ EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+ }
+#ifndef OPENSSL_NO_ENGINE
+ skip_to_init:
+#endif
+ if (ctx->pctx) {
+ 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;
+ }
+ if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT)
+ return 1;
+ return ctx->digest->init(ctx);
+}
-int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data,
- unsigned int count)
- {
- return ctx->digest->update(ctx,data,(unsigned long)count);
- }
+int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+ 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_cleanup(ctx);
- return ret;
- }
+{
+ 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 *size)
- {
- int ret;
- ret=ctx->digest->final(ctx,md);
- if (size != NULL)
- *size=ctx->digest->md_size;
- if (ctx->digest->cleanup)
- {
- ctx->digest->cleanup(ctx);
- EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
- }
- memset(ctx->md_data,0,ctx->digest->ctx_size);
- return ret;
- }
+{
+ int ret;
+
+ OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
+ ret = ctx->digest->final(ctx, md);
+ if (size != NULL)
+ *size = ctx->digest->md_size;
+ 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;
+
+ 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 {
+ EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
+ }
+
+ return ret;
+}
int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
- {
- EVP_MD_CTX_init(out);
- return EVP_MD_CTX_copy_ex(out, 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)
- {
- if ((in == NULL) || (in->digest == NULL))
- {
- EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
- return 0;
- }
- /* Make sure it's safe to copy a digest context using an ENGINE */
- if (in->engine && !ENGINE_init(in->engine))
- {
- EVPerr(EVP_F_EVP_MD_CTX_COPY,ERR_R_ENGINE_LIB);
- return 0;
- }
+{
+ unsigned char *tmp_buf;
+ if ((in == NULL) || (in->digest == NULL)) {
+ EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED);
+ return 0;
+ }
+#ifndef OPENSSL_NO_ENGINE
+ /* Make sure it's safe to copy a digest context using an ENGINE */
+ if (in->engine && !ENGINE_init(in->engine)) {
+ EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB);
+ return 0;
+ }
+#endif
- EVP_MD_CTX_cleanup(out);
- memcpy(out,in,sizeof *out);
+ 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));
- if (out->digest->ctx_size)
- {
- out->md_data=OPENSSL_malloc(out->digest->ctx_size);
- memcpy(out->md_data,in->md_data,out->digest->ctx_size);
- }
-
- if (out->digest->copy)
- return out->digest->copy(out,in);
-
- return 1;
- }
+ /* 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;
-int EVP_Digest(void *data, unsigned int count,
- unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
- {
- EVP_MD_CTX ctx;
- int ret;
+ 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) {
+ EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+ memcpy(out->md_data, in->md_data, out->digest->ctx_size);
+ }
- EVP_MD_CTX_init(&ctx);
- 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_cleanup(&ctx);
+ out->update = in->update;
- return ret;
- }
+ if (in->pctx) {
+ out->pctx = EVP_PKEY_CTX_dup(in->pctx);
+ if (!out->pctx) {
+ EVP_MD_CTX_reset(out);
+ return 0;
+ }
+ }
-void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
- {
- EVP_MD_CTX_cleanup(ctx);
- OPENSSL_free(ctx);
- }
+ if (out->digest->copy)
+ return out->digest->copy(out, in);
-/* This call frees resources associated with the context */
-int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
- {
- /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
- * because sometimes only copies of the context are ever finalised.
- */
- if (ctx->digest && ctx->digest->cleanup
- && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))
- ctx->digest->cleanup(ctx);
- if (ctx->digest && ctx->digest->ctx_size && ctx->md_data)
- {
- memset(ctx->md_data,0,ctx->digest->ctx_size);
- OPENSSL_free(ctx->md_data);
- }
- if(ctx->engine)
- /* The EVP_MD we used belongs to an ENGINE, release the
- * functional reference we held for this reason. */
- ENGINE_finish(ctx->engine);
- memset(ctx,'\0',sizeof *ctx);
+ 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;
+}
- return 1;
- }
+int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2)
+{
+ if (ctx->digest && ctx->digest->md_ctrl) {
+ int ret = ctx->digest->md_ctrl(ctx, cmd, p1, p2);
+ if (ret <= 0)
+ return 0;
+ return 1;
+ }
+ return 0;
+}
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