248 lines
7.5 KiB
C
248 lines
7.5 KiB
C
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/digest.h>
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#include <assert.h>
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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/obj.h>
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#include <openssl/mem.h>
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#include "internal.h"
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int EVP_MD_type(const EVP_MD *md) { return md->type; }
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uint32_t EVP_MD_flags(const EVP_MD *md) { return md->flags; }
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size_t EVP_MD_size(const EVP_MD *md) { return md->md_size; }
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size_t EVP_MD_block_size(const EVP_MD *md) { return md->block_size; }
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void EVP_MD_CTX_init(EVP_MD_CTX *ctx) { memset(ctx, 0, sizeof(EVP_MD_CTX)); }
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EVP_MD_CTX *EVP_MD_CTX_create(void) {
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EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof(EVP_MD_CTX));
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if (ctx) {
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EVP_MD_CTX_init(ctx);
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}
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return ctx;
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}
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int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) {
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if (ctx->digest && ctx->digest->ctx_size && ctx->md_data) {
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OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
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OPENSSL_free(ctx->md_data);
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}
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assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
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if (ctx->pctx_ops) {
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ctx->pctx_ops->free(ctx->pctx);
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}
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EVP_MD_CTX_init(ctx);
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return 1;
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}
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void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) {
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if (!ctx) {
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return;
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}
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EVP_MD_CTX_cleanup(ctx);
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OPENSSL_free(ctx);
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}
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int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) {
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uint8_t *tmp_buf = NULL;
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if (in == NULL || in->digest == NULL) {
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OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_INPUT_NOT_INITIALIZED);
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return 0;
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}
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if (out->digest == in->digest) {
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/* |md_data| will be the correct size in this case so it's removed from
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* |out| at this point so that |EVP_MD_CTX_cleanup| doesn't free it and
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* then it's reused. */
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tmp_buf = out->md_data;
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out->md_data = NULL;
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}
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EVP_MD_CTX_cleanup(out);
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memcpy(out, in, sizeof(EVP_MD_CTX));
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if (in->md_data && in->digest->ctx_size) {
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if (tmp_buf) {
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out->md_data = tmp_buf;
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} else {
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out->md_data = OPENSSL_malloc(in->digest->ctx_size);
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if (!out->md_data) {
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OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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memcpy(out->md_data, in->md_data, in->digest->ctx_size);
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}
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assert(in->pctx == NULL || in->pctx_ops != NULL);
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if (in->pctx && in->pctx_ops) {
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out->pctx = in->pctx_ops->dup(in->pctx);
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if (!out->pctx) {
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EVP_MD_CTX_cleanup(out);
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return 0;
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}
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}
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return 1;
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}
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int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) {
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EVP_MD_CTX_init(out);
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return EVP_MD_CTX_copy_ex(out, in);
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}
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int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *engine) {
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if (ctx->digest != type) {
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if (ctx->digest && ctx->digest->ctx_size > 0) {
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OPENSSL_free(ctx->md_data);
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}
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ctx->digest = type;
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if (type->ctx_size > 0) {
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ctx->md_data = OPENSSL_malloc(type->ctx_size);
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if (ctx->md_data == NULL) {
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OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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}
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}
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assert(ctx->pctx == NULL || ctx->pctx_ops != NULL);
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ctx->digest->init(ctx);
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return 1;
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}
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int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) {
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EVP_MD_CTX_init(ctx);
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return EVP_DigestInit_ex(ctx, type, NULL);
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}
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int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
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ctx->digest->update(ctx, data, len);
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return 1;
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}
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int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, uint8_t *md_out, unsigned int *size) {
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assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
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ctx->digest->final(ctx, md_out);
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if (size != NULL) {
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*size = ctx->digest->md_size;
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}
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OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size);
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return 1;
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}
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int EVP_DigestFinal(EVP_MD_CTX *ctx, uint8_t *md, unsigned int *size) {
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EVP_DigestFinal_ex(ctx, md, size);
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EVP_MD_CTX_cleanup(ctx);
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return 1;
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}
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int EVP_Digest(const void *data, size_t count, uint8_t *out_md,
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unsigned int *out_size, const EVP_MD *type, ENGINE *impl) {
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EVP_MD_CTX ctx;
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int ret;
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EVP_MD_CTX_init(&ctx);
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ret = EVP_DigestInit_ex(&ctx, type, impl) &&
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EVP_DigestUpdate(&ctx, data, count) &&
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EVP_DigestFinal_ex(&ctx, out_md, out_size);
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EVP_MD_CTX_cleanup(&ctx);
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return ret;
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}
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const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx) {
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if (ctx == NULL) {
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return NULL;
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}
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return ctx->digest;
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}
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unsigned EVP_MD_CTX_size(const EVP_MD_CTX *ctx) {
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return EVP_MD_size(EVP_MD_CTX_md(ctx));
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}
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unsigned EVP_MD_CTX_block_size(const EVP_MD_CTX *ctx) {
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return EVP_MD_block_size(EVP_MD_CTX_md(ctx));
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}
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int EVP_MD_CTX_type(const EVP_MD_CTX *ctx) {
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return EVP_MD_type(EVP_MD_CTX_md(ctx));
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}
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int EVP_add_digest(const EVP_MD *digest) {
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return 1;
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}
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