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- /* 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.] */
-
- #include <openssl/digest.h>
-
- #include <assert.h>
- #include <string.h>
-
- #include <openssl/err.h>
- #include <openssl/obj.h>
- #include <openssl/mem.h>
-
- #include "internal.h"
-
-
- int EVP_MD_type(const EVP_MD *md) { return md->type; }
-
- uint32_t EVP_MD_flags(const EVP_MD *md) { return md->flags; }
-
- size_t EVP_MD_size(const EVP_MD *md) { return md->md_size; }
-
- size_t EVP_MD_block_size(const EVP_MD *md) { return md->block_size; }
-
-
- void EVP_MD_CTX_init(EVP_MD_CTX *ctx) { memset(ctx, 0, sizeof(EVP_MD_CTX)); }
-
- EVP_MD_CTX *EVP_MD_CTX_create(void) {
- EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof(EVP_MD_CTX));
-
- if (ctx) {
- EVP_MD_CTX_init(ctx);
- }
-
- return ctx;
- }
-
- int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) {
- if (ctx->digest && ctx->digest->ctx_size && ctx->md_data) {
- OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
- OPENSSL_free(ctx->md_data);
- }
-
- assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
- if (ctx->pctx_ops) {
- ctx->pctx_ops->free(ctx->pctx);
- }
-
- EVP_MD_CTX_init(ctx);
-
- return 1;
- }
-
- void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) {
- if (!ctx) {
- return;
- }
-
- EVP_MD_CTX_cleanup(ctx);
- OPENSSL_free(ctx);
- }
-
- int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) {
- uint8_t *tmp_buf = NULL;
-
- if (in == NULL || in->digest == NULL) {
- OPENSSL_PUT_ERROR(DIGEST, EVP_MD_CTX_copy_ex,
- DIGEST_R_INPUT_NOT_INITIALIZED);
- return 0;
- }
-
- if (out->digest == in->digest) {
- /* |md_data| will be the correct size in this case so it's removed from
- * |out| at this point so that |EVP_MD_CTX_cleanup| doesn't free it and
- * then it's reused. */
- tmp_buf = out->md_data;
- out->md_data = NULL;
- }
-
- EVP_MD_CTX_cleanup(out);
- memcpy(out, in, sizeof(EVP_MD_CTX));
-
- if (in->md_data && in->digest->ctx_size) {
- if (tmp_buf) {
- out->md_data = tmp_buf;
- } else {
- out->md_data = OPENSSL_malloc(in->digest->ctx_size);
- if (!out->md_data) {
- OPENSSL_PUT_ERROR(DIGEST, EVP_MD_CTX_copy_ex, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
- memcpy(out->md_data, in->md_data, in->digest->ctx_size);
- }
-
- assert(in->pctx == NULL || in->pctx_ops != NULL);
- if (in->pctx && in->pctx_ops) {
- out->pctx = in->pctx_ops->dup(in->pctx);
- if (!out->pctx) {
- EVP_MD_CTX_cleanup(out);
- return 0;
- }
- }
-
- return 1;
- }
-
- 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);
- }
-
- int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine) {
- if (ctx->digest != type) {
- if (ctx->digest && ctx->digest->ctx_size) {
- OPENSSL_free(ctx->md_data);
- }
- ctx->digest = type;
- if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {
- ctx->update = type->update;
- ctx->md_data = OPENSSL_malloc(type->ctx_size);
- if (ctx->md_data == NULL) {
- OPENSSL_PUT_ERROR(DIGEST, EVP_DigestInit_ex, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- }
- }
-
- assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
- if (ctx->pctx_ops) {
- if (!ctx->pctx_ops->begin_digest(ctx)) {
- return 0;
- }
- }
-
- if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) {
- return 1;
- }
-
- return ctx->digest->init(ctx);
- }
-
- int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) {
- EVP_MD_CTX_init(ctx);
- return EVP_DigestInit_ex(ctx, type, NULL);
- }
-
- int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
- return ctx->update(ctx, data, len);
- }
-
- int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, uint8_t *md_out, unsigned int *size) {
- int ret;
-
- assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
- ret = ctx->digest->final(ctx, md_out);
- if (size != NULL) {
- *size = ctx->digest->md_size;
- }
- OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
-
- return ret;
- }
-
- int EVP_DigestFinal(EVP_MD_CTX *ctx, uint8_t *md, unsigned int *size) {
- int ret = EVP_DigestFinal_ex(ctx, md, size);
- EVP_MD_CTX_cleanup(ctx);
- return ret;
- }
-
- int EVP_Digest(const void *data, size_t count, uint8_t *out_md,
- unsigned int *out_size, const EVP_MD *type, ENGINE *impl) {
- EVP_MD_CTX ctx;
- int ret;
-
- EVP_MD_CTX_init(&ctx);
- ret = EVP_DigestInit_ex(&ctx, type, impl) &&
- EVP_DigestUpdate(&ctx, data, count) &&
- EVP_DigestFinal_ex(&ctx, out_md, out_size);
- EVP_MD_CTX_cleanup(&ctx);
-
- return ret;
- }
-
-
- const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) {
- if (ctx == NULL) {
- return NULL;
- }
- return ctx->digest;
- }
-
- unsigned EVP_MD_CTX_size(const EVP_MD_CTX *ctx) {
- return EVP_MD_size(EVP_MD_CTX_md(ctx));
- }
-
- unsigned EVP_MD_CTX_block_size(const EVP_MD_CTX *ctx) {
- return EVP_MD_block_size(EVP_MD_CTX_md(ctx));
- }
-
- int EVP_MD_CTX_type(const EVP_MD_CTX *ctx) {
- return EVP_MD_type(EVP_MD_CTX_md(ctx));
- }
-
- void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, uint32_t flags) {
- ctx->flags |= flags;
- }
-
- void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, uint32_t flags) {
- ctx->flags &= ~flags;
- }
-
- uint32_t EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, uint32_t flags) {
- return ctx->flags & flags;
- }
-
- int EVP_add_digest(const EVP_MD *digest) {
- return 1;
- }
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