155714Skris/* crypto/evp/digest.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8296341Sdelphij * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296341Sdelphij * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22296341Sdelphij * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37296341Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296341Sdelphij * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52296341Sdelphij * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 58109998Smarkm/* ==================================================================== 59109998Smarkm * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. 60109998Smarkm * 61109998Smarkm * Redistribution and use in source and binary forms, with or without 62109998Smarkm * modification, are permitted provided that the following conditions 63109998Smarkm * are met: 64109998Smarkm * 65109998Smarkm * 1. Redistributions of source code must retain the above copyright 66296341Sdelphij * notice, this list of conditions and the following disclaimer. 67109998Smarkm * 68109998Smarkm * 2. Redistributions in binary form must reproduce the above copyright 69109998Smarkm * notice, this list of conditions and the following disclaimer in 70109998Smarkm * the documentation and/or other materials provided with the 71109998Smarkm * distribution. 72109998Smarkm * 73109998Smarkm * 3. All advertising materials mentioning features or use of this 74109998Smarkm * software must display the following acknowledgment: 75109998Smarkm * "This product includes software developed by the OpenSSL Project 76109998Smarkm * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77109998Smarkm * 78109998Smarkm * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79109998Smarkm * endorse or promote products derived from this software without 80109998Smarkm * prior written permission. For written permission, please contact 81109998Smarkm * openssl-core@openssl.org. 82109998Smarkm * 83109998Smarkm * 5. Products derived from this software may not be called "OpenSSL" 84109998Smarkm * nor may "OpenSSL" appear in their names without prior written 85109998Smarkm * permission of the OpenSSL Project. 86109998Smarkm * 87109998Smarkm * 6. Redistributions of any form whatsoever must retain the following 88109998Smarkm * acknowledgment: 89109998Smarkm * "This product includes software developed by the OpenSSL Project 90109998Smarkm * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91109998Smarkm * 92109998Smarkm * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93109998Smarkm * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94109998Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95109998Smarkm * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96109998Smarkm * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97109998Smarkm * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98109998Smarkm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99109998Smarkm * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100109998Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101109998Smarkm * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102109998Smarkm * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103109998Smarkm * OF THE POSSIBILITY OF SUCH DAMAGE. 104109998Smarkm * ==================================================================== 105109998Smarkm * 106109998Smarkm * This product includes cryptographic software written by Eric Young 107109998Smarkm * (eay@cryptsoft.com). This product includes software written by Tim 108109998Smarkm * Hudson (tjh@cryptsoft.com). 109109998Smarkm * 110109998Smarkm */ 11155714Skris 11255714Skris#include <stdio.h> 11355714Skris#include "cryptlib.h" 11455714Skris#include <openssl/objects.h> 11555714Skris#include <openssl/evp.h> 116111147Snectar#ifndef OPENSSL_NO_ENGINE 117296341Sdelphij# include <openssl/engine.h> 118111147Snectar#endif 11955714Skris 120238405Sjkim#ifdef OPENSSL_FIPS 121296341Sdelphij# include <openssl/fips.h> 122238405Sjkim#endif 123238405Sjkim 124109998Smarkmvoid EVP_MD_CTX_init(EVP_MD_CTX *ctx) 125296341Sdelphij{ 126296341Sdelphij memset(ctx, '\0', sizeof *ctx); 127296341Sdelphij} 12855714Skris 129109998SmarkmEVP_MD_CTX *EVP_MD_CTX_create(void) 130296341Sdelphij{ 131296341Sdelphij EVP_MD_CTX *ctx = OPENSSL_malloc(sizeof *ctx); 132109998Smarkm 133296341Sdelphij if (ctx) 134296341Sdelphij EVP_MD_CTX_init(ctx); 135109998Smarkm 136296341Sdelphij return ctx; 137296341Sdelphij} 138109998Smarkm 139109998Smarkmint EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) 140296341Sdelphij{ 141296341Sdelphij EVP_MD_CTX_init(ctx); 142296341Sdelphij return EVP_DigestInit_ex(ctx, type, NULL); 143296341Sdelphij} 144109998Smarkm 145238405Sjkimint EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) 146296341Sdelphij{ 147296341Sdelphij EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); 148111147Snectar#ifndef OPENSSL_NO_ENGINE 149296341Sdelphij /* 150296341Sdelphij * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so 151296341Sdelphij * this context may already have an ENGINE! Try to avoid releasing the 152296341Sdelphij * previous handle, re-querying for an ENGINE, and having a 153296341Sdelphij * reinitialisation, when it may all be unecessary. 154296341Sdelphij */ 155296341Sdelphij if (ctx->engine && ctx->digest && (!type || 156296341Sdelphij (type 157296341Sdelphij && (type->type == 158296341Sdelphij ctx->digest->type)))) 159296341Sdelphij goto skip_to_init; 160296341Sdelphij if (type) { 161296341Sdelphij /* 162296341Sdelphij * Ensure an ENGINE left lying around from last time is cleared (the 163296341Sdelphij * previous check attempted to avoid this if the same ENGINE and 164296341Sdelphij * EVP_MD could be used). 165296341Sdelphij */ 166296341Sdelphij if (ctx->engine) 167296341Sdelphij ENGINE_finish(ctx->engine); 168296341Sdelphij if (impl) { 169296341Sdelphij if (!ENGINE_init(impl)) { 170296341Sdelphij EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); 171296341Sdelphij return 0; 172296341Sdelphij } 173296341Sdelphij } else 174296341Sdelphij /* Ask if an ENGINE is reserved for this job */ 175296341Sdelphij impl = ENGINE_get_digest_engine(type->type); 176296341Sdelphij if (impl) { 177296341Sdelphij /* There's an ENGINE for this job ... (apparently) */ 178296341Sdelphij const EVP_MD *d = ENGINE_get_digest(impl, type->type); 179296341Sdelphij if (!d) { 180296341Sdelphij /* Same comment from evp_enc.c */ 181296341Sdelphij EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_INITIALIZATION_ERROR); 182296341Sdelphij ENGINE_finish(impl); 183296341Sdelphij return 0; 184296341Sdelphij } 185296341Sdelphij /* We'll use the ENGINE's private digest definition */ 186296341Sdelphij type = d; 187296341Sdelphij /* 188296341Sdelphij * Store the ENGINE functional reference so we know 'type' came 189296341Sdelphij * from an ENGINE and we need to release it when done. 190296341Sdelphij */ 191296341Sdelphij ctx->engine = impl; 192296341Sdelphij } else 193296341Sdelphij ctx->engine = NULL; 194296341Sdelphij } else { 195296341Sdelphij if (!ctx->digest) { 196296341Sdelphij EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_NO_DIGEST_SET); 197296341Sdelphij return 0; 198296341Sdelphij } 199296341Sdelphij type = ctx->digest; 200296341Sdelphij } 201120631Snectar#endif 202296341Sdelphij if (ctx->digest != type) { 203296341Sdelphij if (ctx->digest && ctx->digest->ctx_size) 204296341Sdelphij OPENSSL_free(ctx->md_data); 205296341Sdelphij ctx->digest = type; 206296341Sdelphij if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) { 207296341Sdelphij ctx->update = type->update; 208296341Sdelphij ctx->md_data = OPENSSL_malloc(type->ctx_size); 209296341Sdelphij if (ctx->md_data == NULL) { 210296341Sdelphij EVPerr(EVP_F_EVP_DIGESTINIT_EX, ERR_R_MALLOC_FAILURE); 211296341Sdelphij return 0; 212296341Sdelphij } 213296341Sdelphij } 214296341Sdelphij } 215111147Snectar#ifndef OPENSSL_NO_ENGINE 216296341Sdelphij skip_to_init: 217111147Snectar#endif 218296341Sdelphij if (ctx->pctx) { 219296341Sdelphij int r; 220296341Sdelphij r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, 221296341Sdelphij EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); 222296341Sdelphij if (r <= 0 && (r != -2)) 223296341Sdelphij return 0; 224296341Sdelphij } 225296341Sdelphij if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) 226296341Sdelphij return 1; 227238405Sjkim#ifdef OPENSSL_FIPS 228296341Sdelphij if (FIPS_mode()) { 229296341Sdelphij if (FIPS_digestinit(ctx, type)) 230296341Sdelphij return 1; 231296341Sdelphij OPENSSL_free(ctx->md_data); 232296341Sdelphij ctx->md_data = NULL; 233296341Sdelphij return 0; 234296341Sdelphij } 235238405Sjkim#endif 236296341Sdelphij return ctx->digest->init(ctx); 237296341Sdelphij} 238109998Smarkm 239238405Sjkimint EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) 240296341Sdelphij{ 241194206Ssimon#ifdef OPENSSL_FIPS 242296341Sdelphij return FIPS_digestupdate(ctx, data, count); 243238405Sjkim#else 244296341Sdelphij return ctx->update(ctx, data, count); 245194206Ssimon#endif 246296341Sdelphij} 24755714Skris 248109998Smarkm/* The caller can assume that this removes any secret data from the context */ 249109998Smarkmint EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) 250296341Sdelphij{ 251296341Sdelphij int ret; 252296341Sdelphij ret = EVP_DigestFinal_ex(ctx, md, size); 253296341Sdelphij EVP_MD_CTX_cleanup(ctx); 254296341Sdelphij return ret; 255296341Sdelphij} 256109998Smarkm 257109998Smarkm/* The caller can assume that this removes any secret data from the context */ 258109998Smarkmint EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) 259296341Sdelphij{ 260238405Sjkim#ifdef OPENSSL_FIPS 261296341Sdelphij return FIPS_digestfinal(ctx, md, size); 262238405Sjkim#else 263296341Sdelphij int ret; 264246772Sjkim 265296341Sdelphij OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); 266296341Sdelphij ret = ctx->digest->final(ctx, md); 267296341Sdelphij if (size != NULL) 268296341Sdelphij *size = ctx->digest->md_size; 269296341Sdelphij if (ctx->digest->cleanup) { 270296341Sdelphij ctx->digest->cleanup(ctx); 271296341Sdelphij EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_CLEANED); 272296341Sdelphij } 273296341Sdelphij memset(ctx->md_data, 0, ctx->digest->ctx_size); 274296341Sdelphij return ret; 275238405Sjkim#endif 276296341Sdelphij} 27755714Skris 278109998Smarkmint EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) 279296341Sdelphij{ 280296341Sdelphij EVP_MD_CTX_init(out); 281296341Sdelphij return EVP_MD_CTX_copy_ex(out, in); 282296341Sdelphij} 283109998Smarkm 284109998Smarkmint EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) 285296341Sdelphij{ 286296341Sdelphij unsigned char *tmp_buf; 287296341Sdelphij if ((in == NULL) || (in->digest == NULL)) { 288296341Sdelphij EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, EVP_R_INPUT_NOT_INITIALIZED); 289296341Sdelphij return 0; 290296341Sdelphij } 291111147Snectar#ifndef OPENSSL_NO_ENGINE 292296341Sdelphij /* Make sure it's safe to copy a digest context using an ENGINE */ 293296341Sdelphij if (in->engine && !ENGINE_init(in->engine)) { 294296341Sdelphij EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_ENGINE_LIB); 295296341Sdelphij return 0; 296296341Sdelphij } 297111147Snectar#endif 298109998Smarkm 299296341Sdelphij if (out->digest == in->digest) { 300296341Sdelphij tmp_buf = out->md_data; 301296341Sdelphij EVP_MD_CTX_set_flags(out, EVP_MD_CTX_FLAG_REUSE); 302296341Sdelphij } else 303296341Sdelphij tmp_buf = NULL; 304296341Sdelphij EVP_MD_CTX_cleanup(out); 305296341Sdelphij memcpy(out, in, sizeof *out); 306109998Smarkm 307296341Sdelphij if (in->md_data && out->digest->ctx_size) { 308296341Sdelphij if (tmp_buf) 309296341Sdelphij out->md_data = tmp_buf; 310296341Sdelphij else { 311296341Sdelphij out->md_data = OPENSSL_malloc(out->digest->ctx_size); 312296341Sdelphij if (!out->md_data) { 313296341Sdelphij EVPerr(EVP_F_EVP_MD_CTX_COPY_EX, ERR_R_MALLOC_FAILURE); 314296341Sdelphij return 0; 315296341Sdelphij } 316296341Sdelphij } 317296341Sdelphij memcpy(out->md_data, in->md_data, out->digest->ctx_size); 318296341Sdelphij } 319127128Snectar 320296341Sdelphij out->update = in->update; 321238405Sjkim 322296341Sdelphij if (in->pctx) { 323296341Sdelphij out->pctx = EVP_PKEY_CTX_dup(in->pctx); 324296341Sdelphij if (!out->pctx) { 325296341Sdelphij EVP_MD_CTX_cleanup(out); 326296341Sdelphij return 0; 327296341Sdelphij } 328296341Sdelphij } 329238405Sjkim 330296341Sdelphij if (out->digest->copy) 331296341Sdelphij return out->digest->copy(out, in); 332109998Smarkm 333296341Sdelphij return 1; 334296341Sdelphij} 335296341Sdelphij 336160814Ssimonint EVP_Digest(const void *data, size_t count, 337296341Sdelphij unsigned char *md, unsigned int *size, const EVP_MD *type, 338296341Sdelphij ENGINE *impl) 339296341Sdelphij{ 340296341Sdelphij EVP_MD_CTX ctx; 341296341Sdelphij int ret; 342109998Smarkm 343296341Sdelphij EVP_MD_CTX_init(&ctx); 344296341Sdelphij EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_ONESHOT); 345296341Sdelphij ret = EVP_DigestInit_ex(&ctx, type, impl) 346296341Sdelphij && EVP_DigestUpdate(&ctx, data, count) 347296341Sdelphij && EVP_DigestFinal_ex(&ctx, md, size); 348296341Sdelphij EVP_MD_CTX_cleanup(&ctx); 349109998Smarkm 350296341Sdelphij return ret; 351296341Sdelphij} 352109998Smarkm 353109998Smarkmvoid EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) 354296341Sdelphij{ 355296341Sdelphij if (ctx) { 356296341Sdelphij EVP_MD_CTX_cleanup(ctx); 357296341Sdelphij OPENSSL_free(ctx); 358296341Sdelphij } 359296341Sdelphij} 360109998Smarkm 361109998Smarkm/* This call frees resources associated with the context */ 362109998Smarkmint EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) 363296341Sdelphij{ 364238405Sjkim#ifndef OPENSSL_FIPS 365296341Sdelphij /* 366296341Sdelphij * Don't assume ctx->md_data was cleaned in EVP_Digest_Final, because 367296341Sdelphij * sometimes only copies of the context are ever finalised. 368296341Sdelphij */ 369296341Sdelphij if (ctx->digest && ctx->digest->cleanup 370296341Sdelphij && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED)) 371296341Sdelphij ctx->digest->cleanup(ctx); 372296341Sdelphij if (ctx->digest && ctx->digest->ctx_size && ctx->md_data 373296341Sdelphij && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) { 374296341Sdelphij OPENSSL_cleanse(ctx->md_data, ctx->digest->ctx_size); 375296341Sdelphij OPENSSL_free(ctx->md_data); 376296341Sdelphij } 377238405Sjkim#endif 378296341Sdelphij if (ctx->pctx) 379296341Sdelphij EVP_PKEY_CTX_free(ctx->pctx); 380111147Snectar#ifndef OPENSSL_NO_ENGINE 381296341Sdelphij if (ctx->engine) 382296341Sdelphij /* 383296341Sdelphij * The EVP_MD we used belongs to an ENGINE, release the functional 384296341Sdelphij * reference we held for this reason. 385296341Sdelphij */ 386296341Sdelphij ENGINE_finish(ctx->engine); 387111147Snectar#endif 388238405Sjkim#ifdef OPENSSL_FIPS 389296341Sdelphij FIPS_md_ctx_cleanup(ctx); 390238405Sjkim#endif 391296341Sdelphij memset(ctx, '\0', sizeof *ctx); 392109998Smarkm 393296341Sdelphij return 1; 394296341Sdelphij} 395