| /* 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; } |
| |
| const char *EVP_MD_name(const EVP_MD *md) { return OBJ_nid2sn(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; |
| } |