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. 855714Skris * 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). 1555714Skris * 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. 2255714Skris * 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 :-). 3755714Skris * 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)" 4055714Skris * 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. 5255714Skris * 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 66109998Smarkm * 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 117109998Smarkm#include <openssl/engine.h> 118111147Snectar#endif 11955714Skris 120238405Sjkim#ifdef OPENSSL_FIPS 121238405Sjkim#include <openssl/fips.h> 122238405Sjkim#endif 123238405Sjkim 124109998Smarkmvoid EVP_MD_CTX_init(EVP_MD_CTX *ctx) 12555714Skris { 126109998Smarkm memset(ctx,'\0',sizeof *ctx); 12755714Skris } 12855714Skris 129109998SmarkmEVP_MD_CTX *EVP_MD_CTX_create(void) 130109998Smarkm { 131109998Smarkm EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx); 132109998Smarkm 133205128Ssimon if (ctx) 134205128Ssimon EVP_MD_CTX_init(ctx); 135109998Smarkm 136109998Smarkm return ctx; 137109998Smarkm } 138109998Smarkm 139109998Smarkmint EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) 140109998Smarkm { 141109998Smarkm EVP_MD_CTX_init(ctx); 142109998Smarkm return EVP_DigestInit_ex(ctx, type, NULL); 143109998Smarkm } 144109998Smarkm 145238405Sjkimint EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) 146109998Smarkm { 147238405Sjkim EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); 148111147Snectar#ifndef OPENSSL_NO_ENGINE 149238405Sjkim /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts 150238405Sjkim * so this context may already have an ENGINE! Try to avoid releasing 151238405Sjkim * the previous handle, re-querying for an ENGINE, and having a 152238405Sjkim * reinitialisation, when it may all be unecessary. */ 153238405Sjkim if (ctx->engine && ctx->digest && (!type || 154238405Sjkim (type && (type->type == ctx->digest->type)))) 155238405Sjkim goto skip_to_init; 156238405Sjkim if (type) 157109998Smarkm { 158109998Smarkm /* Ensure an ENGINE left lying around from last time is cleared 159109998Smarkm * (the previous check attempted to avoid this if the same 160109998Smarkm * ENGINE and EVP_MD could be used). */ 161109998Smarkm if(ctx->engine) 162109998Smarkm ENGINE_finish(ctx->engine); 163109998Smarkm if(impl) 164109998Smarkm { 165109998Smarkm if (!ENGINE_init(impl)) 166109998Smarkm { 167238405Sjkim EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR); 168109998Smarkm return 0; 169109998Smarkm } 170109998Smarkm } 171109998Smarkm else 172109998Smarkm /* Ask if an ENGINE is reserved for this job */ 173238405Sjkim impl = ENGINE_get_digest_engine(type->type); 174109998Smarkm if(impl) 175109998Smarkm { 176109998Smarkm /* There's an ENGINE for this job ... (apparently) */ 177238405Sjkim const EVP_MD *d = ENGINE_get_digest(impl, type->type); 178109998Smarkm if(!d) 179109998Smarkm { 180109998Smarkm /* Same comment from evp_enc.c */ 181238405Sjkim EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR); 182206046Ssimon ENGINE_finish(impl); 183109998Smarkm return 0; 184109998Smarkm } 185109998Smarkm /* We'll use the ENGINE's private digest definition */ 186238405Sjkim type = d; 187109998Smarkm /* Store the ENGINE functional reference so we know 188109998Smarkm * 'type' came from an ENGINE and we need to release 189109998Smarkm * it when done. */ 190109998Smarkm ctx->engine = impl; 191109998Smarkm } 192109998Smarkm else 193109998Smarkm ctx->engine = NULL; 194109998Smarkm } 195111147Snectar else 196111147Snectar if(!ctx->digest) 197109998Smarkm { 198238405Sjkim EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_NO_DIGEST_SET); 199109998Smarkm return 0; 200109998Smarkm } 201120631Snectar#endif 202109998Smarkm if (ctx->digest != type) 203109998Smarkm { 204109998Smarkm if (ctx->digest && ctx->digest->ctx_size) 205109998Smarkm OPENSSL_free(ctx->md_data); 206109998Smarkm ctx->digest=type; 207238405Sjkim if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) 208205128Ssimon { 209238405Sjkim ctx->update = type->update; 210109998Smarkm ctx->md_data=OPENSSL_malloc(type->ctx_size); 211238405Sjkim if (ctx->md_data == NULL) 212205128Ssimon { 213238405Sjkim EVPerr(EVP_F_EVP_DIGESTINIT_EX, 214238405Sjkim ERR_R_MALLOC_FAILURE); 215205128Ssimon return 0; 216205128Ssimon } 217205128Ssimon } 218109998Smarkm } 219111147Snectar#ifndef OPENSSL_NO_ENGINE 220238405Sjkimskip_to_init: 221111147Snectar#endif 222238405Sjkim if (ctx->pctx) 223238405Sjkim { 224238405Sjkim int r; 225238405Sjkim r = EVP_PKEY_CTX_ctrl(ctx->pctx, -1, EVP_PKEY_OP_TYPE_SIG, 226238405Sjkim EVP_PKEY_CTRL_DIGESTINIT, 0, ctx); 227238405Sjkim if (r <= 0 && (r != -2)) 228238405Sjkim return 0; 229238405Sjkim } 230238405Sjkim if (ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) 231238405Sjkim return 1; 232238405Sjkim#ifdef OPENSSL_FIPS 233238405Sjkim if (FIPS_mode()) 234238405Sjkim { 235238405Sjkim if (FIPS_digestinit(ctx, type)) 236238405Sjkim return 1; 237238405Sjkim OPENSSL_free(ctx->md_data); 238238405Sjkim ctx->md_data = NULL; 239238405Sjkim return 0; 240238405Sjkim } 241238405Sjkim#endif 242109998Smarkm return ctx->digest->init(ctx); 243109998Smarkm } 244109998Smarkm 245238405Sjkimint EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, size_t count) 24655714Skris { 247194206Ssimon#ifdef OPENSSL_FIPS 248238405Sjkim return FIPS_digestupdate(ctx, data, count); 249238405Sjkim#else 250238405Sjkim return ctx->update(ctx,data,count); 251194206Ssimon#endif 25255714Skris } 25355714Skris 254109998Smarkm/* The caller can assume that this removes any secret data from the context */ 255109998Smarkmint EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) 25655714Skris { 257109998Smarkm int ret; 258109998Smarkm ret = EVP_DigestFinal_ex(ctx, md, size); 259109998Smarkm EVP_MD_CTX_cleanup(ctx); 260109998Smarkm return ret; 261109998Smarkm } 262109998Smarkm 263109998Smarkm/* The caller can assume that this removes any secret data from the context */ 264109998Smarkmint EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) 265109998Smarkm { 266238405Sjkim#ifdef OPENSSL_FIPS 267238405Sjkim return FIPS_digestfinal(ctx, md, size); 268238405Sjkim#else 269109998Smarkm int ret; 270246772Sjkim 271109998Smarkm OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); 272109998Smarkm ret=ctx->digest->final(ctx,md); 27355714Skris if (size != NULL) 27455714Skris *size=ctx->digest->md_size; 275109998Smarkm if (ctx->digest->cleanup) 276109998Smarkm { 277109998Smarkm ctx->digest->cleanup(ctx); 278238405Sjkim EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); 279109998Smarkm } 280109998Smarkm memset(ctx->md_data,0,ctx->digest->ctx_size); 281109998Smarkm return ret; 282238405Sjkim#endif 28355714Skris } 28455714Skris 285109998Smarkmint EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) 286109998Smarkm { 287109998Smarkm EVP_MD_CTX_init(out); 288109998Smarkm return EVP_MD_CTX_copy_ex(out, in); 289109998Smarkm } 290109998Smarkm 291109998Smarkmint EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) 292109998Smarkm { 293127128Snectar unsigned char *tmp_buf; 294109998Smarkm if ((in == NULL) || (in->digest == NULL)) 295109998Smarkm { 296160814Ssimon EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,EVP_R_INPUT_NOT_INITIALIZED); 297109998Smarkm return 0; 298109998Smarkm } 299111147Snectar#ifndef OPENSSL_NO_ENGINE 300109998Smarkm /* Make sure it's safe to copy a digest context using an ENGINE */ 301238405Sjkim if (in->engine && !ENGINE_init(in->engine)) 302109998Smarkm { 303160814Ssimon EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_ENGINE_LIB); 304109998Smarkm return 0; 305109998Smarkm } 306111147Snectar#endif 307109998Smarkm 308127128Snectar if (out->digest == in->digest) 309127128Snectar { 310127128Snectar tmp_buf = out->md_data; 311238405Sjkim EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE); 312127128Snectar } 313127128Snectar else tmp_buf = NULL; 314109998Smarkm EVP_MD_CTX_cleanup(out); 315109998Smarkm memcpy(out,in,sizeof *out); 316109998Smarkm 317238405Sjkim if (in->md_data && out->digest->ctx_size) 318109998Smarkm { 319205128Ssimon if (tmp_buf) 320205128Ssimon out->md_data = tmp_buf; 321205128Ssimon else 322205128Ssimon { 323205128Ssimon out->md_data=OPENSSL_malloc(out->digest->ctx_size); 324205128Ssimon if (!out->md_data) 325205128Ssimon { 326205128Ssimon EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_MALLOC_FAILURE); 327205128Ssimon return 0; 328205128Ssimon } 329205128Ssimon } 330109998Smarkm memcpy(out->md_data,in->md_data,out->digest->ctx_size); 331109998Smarkm } 332127128Snectar 333238405Sjkim out->update = in->update; 334238405Sjkim 335238405Sjkim if (in->pctx) 336238405Sjkim { 337238405Sjkim out->pctx = EVP_PKEY_CTX_dup(in->pctx); 338238405Sjkim if (!out->pctx) 339238405Sjkim { 340238405Sjkim EVP_MD_CTX_cleanup(out); 341238405Sjkim return 0; 342238405Sjkim } 343238405Sjkim } 344238405Sjkim 345109998Smarkm if (out->digest->copy) 346109998Smarkm return out->digest->copy(out,in); 347109998Smarkm 348109998Smarkm return 1; 349109998Smarkm } 350109998Smarkm 351160814Ssimonint EVP_Digest(const void *data, size_t count, 352109998Smarkm unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl) 353109998Smarkm { 354109998Smarkm EVP_MD_CTX ctx; 355109998Smarkm int ret; 356109998Smarkm 357109998Smarkm EVP_MD_CTX_init(&ctx); 358238405Sjkim EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT); 359109998Smarkm ret=EVP_DigestInit_ex(&ctx, type, impl) 360109998Smarkm && EVP_DigestUpdate(&ctx, data, count) 361109998Smarkm && EVP_DigestFinal_ex(&ctx, md, size); 362109998Smarkm EVP_MD_CTX_cleanup(&ctx); 363109998Smarkm 364109998Smarkm return ret; 365109998Smarkm } 366109998Smarkm 367109998Smarkmvoid EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) 368109998Smarkm { 369279264Sdelphij if (ctx) 370279264Sdelphij { 371279264Sdelphij EVP_MD_CTX_cleanup(ctx); 372279264Sdelphij OPENSSL_free(ctx); 373279264Sdelphij } 374109998Smarkm } 375109998Smarkm 376109998Smarkm/* This call frees resources associated with the context */ 377109998Smarkmint EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) 378109998Smarkm { 379238405Sjkim#ifndef OPENSSL_FIPS 380109998Smarkm /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final, 381109998Smarkm * because sometimes only copies of the context are ever finalised. 382109998Smarkm */ 383109998Smarkm if (ctx->digest && ctx->digest->cleanup 384238405Sjkim && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED)) 385109998Smarkm ctx->digest->cleanup(ctx); 386127128Snectar if (ctx->digest && ctx->digest->ctx_size && ctx->md_data 387238405Sjkim && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) 388109998Smarkm { 389109998Smarkm OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size); 390109998Smarkm OPENSSL_free(ctx->md_data); 391109998Smarkm } 392238405Sjkim#endif 393238405Sjkim if (ctx->pctx) 394238405Sjkim EVP_PKEY_CTX_free(ctx->pctx); 395111147Snectar#ifndef OPENSSL_NO_ENGINE 396109998Smarkm if(ctx->engine) 397109998Smarkm /* The EVP_MD we used belongs to an ENGINE, release the 398109998Smarkm * functional reference we held for this reason. */ 399238405Sjkim ENGINE_finish(ctx->engine); 400111147Snectar#endif 401238405Sjkim#ifdef OPENSSL_FIPS 402238405Sjkim FIPS_md_ctx_cleanup(ctx); 403238405Sjkim#endif 404109998Smarkm memset(ctx,'\0',sizeof *ctx); 405109998Smarkm 406109998Smarkm return 1; 407109998Smarkm } 408