1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/evp/digest.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,353 @@
1.4 +/* crypto/evp/digest.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +/* ====================================================================
1.62 + * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
1.63 + *
1.64 + * Redistribution and use in source and binary forms, with or without
1.65 + * modification, are permitted provided that the following conditions
1.66 + * are met:
1.67 + *
1.68 + * 1. Redistributions of source code must retain the above copyright
1.69 + * notice, this list of conditions and the following disclaimer.
1.70 + *
1.71 + * 2. Redistributions in binary form must reproduce the above copyright
1.72 + * notice, this list of conditions and the following disclaimer in
1.73 + * the documentation and/or other materials provided with the
1.74 + * distribution.
1.75 + *
1.76 + * 3. All advertising materials mentioning features or use of this
1.77 + * software must display the following acknowledgment:
1.78 + * "This product includes software developed by the OpenSSL Project
1.79 + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
1.80 + *
1.81 + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
1.82 + * endorse or promote products derived from this software without
1.83 + * prior written permission. For written permission, please contact
1.84 + * openssl-core@openssl.org.
1.85 + *
1.86 + * 5. Products derived from this software may not be called "OpenSSL"
1.87 + * nor may "OpenSSL" appear in their names without prior written
1.88 + * permission of the OpenSSL Project.
1.89 + *
1.90 + * 6. Redistributions of any form whatsoever must retain the following
1.91 + * acknowledgment:
1.92 + * "This product includes software developed by the OpenSSL Project
1.93 + * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
1.94 + *
1.95 + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
1.96 + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.97 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.98 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
1.99 + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.100 + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1.101 + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
1.102 + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.103 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1.104 + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.105 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
1.106 + * OF THE POSSIBILITY OF SUCH DAMAGE.
1.107 + * ====================================================================
1.108 + *
1.109 + * This product includes cryptographic software written by Eric Young
1.110 + * (eay@cryptsoft.com). This product includes software written by Tim
1.111 + * Hudson (tjh@cryptsoft.com).
1.112 + *
1.113 + */
1.114 +
1.115 +#include <stdio.h>
1.116 +#include "cryptlib.h"
1.117 +#include <openssl/objects.h>
1.118 +#include <openssl/evp.h>
1.119 +#ifndef OPENSSL_NO_ENGINE
1.120 +#include <openssl/engine.h>
1.121 +#endif
1.122 +
1.123 +EXPORT_C void EVP_MD_CTX_init(EVP_MD_CTX *ctx)
1.124 + {
1.125 + memset(ctx,'\0',sizeof *ctx);
1.126 + }
1.127 +
1.128 +EXPORT_C EVP_MD_CTX *EVP_MD_CTX_create(void)
1.129 + {
1.130 + EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx);
1.131 + if(ctx==NULL)
1.132 + {
1.133 + return ctx;
1.134 + }
1.135 + EVP_MD_CTX_init(ctx);
1.136 +
1.137 + return ctx;
1.138 + }
1.139 +
1.140 +EXPORT_C int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type)
1.141 + {
1.142 + EVP_MD_CTX_init(ctx);
1.143 + return EVP_DigestInit_ex(ctx, type, NULL);
1.144 + }
1.145 +
1.146 +EXPORT_C int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
1.147 + {
1.148 + EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
1.149 +#ifndef OPENSSL_NO_ENGINE
1.150 + /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
1.151 + * so this context may already have an ENGINE! Try to avoid releasing
1.152 + * the previous handle, re-querying for an ENGINE, and having a
1.153 + * reinitialisation, when it may all be unecessary. */
1.154 + if (ctx->engine && ctx->digest && (!type ||
1.155 + (type && (type->type == ctx->digest->type))))
1.156 + goto skip_to_init;
1.157 + if (type)
1.158 + {
1.159 + /* Ensure an ENGINE left lying around from last time is cleared
1.160 + * (the previous check attempted to avoid this if the same
1.161 + * ENGINE and EVP_MD could be used). */
1.162 + if(ctx->engine)
1.163 + ENGINE_finish(ctx->engine);
1.164 + if(impl)
1.165 + {
1.166 + if (!ENGINE_init(impl))
1.167 + {
1.168 + EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR);
1.169 + return 0;
1.170 + }
1.171 + }
1.172 + else
1.173 + /* Ask if an ENGINE is reserved for this job */
1.174 + impl = ENGINE_get_digest_engine(type->type);
1.175 + if(impl)
1.176 + {
1.177 + /* There's an ENGINE for this job ... (apparently) */
1.178 + const EVP_MD *d = ENGINE_get_digest(impl, type->type);
1.179 + if(!d)
1.180 + {
1.181 + /* Same comment from evp_enc.c */
1.182 + EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_INITIALIZATION_ERROR);
1.183 + return 0;
1.184 + }
1.185 + /* We'll use the ENGINE's private digest definition */
1.186 + type = d;
1.187 + /* Store the ENGINE functional reference so we know
1.188 + * 'type' came from an ENGINE and we need to release
1.189 + * it when done. */
1.190 + ctx->engine = impl;
1.191 + }
1.192 + else
1.193 + ctx->engine = NULL;
1.194 + }
1.195 + else
1.196 + if(!ctx->digest)
1.197 + {
1.198 + EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_NO_DIGEST_SET);
1.199 + return 0;
1.200 + }
1.201 +#endif
1.202 + if (ctx->digest != type)
1.203 + {
1.204 + if (ctx->digest && ctx->digest->ctx_size)
1.205 + { if(ctx->md_data)
1.206 + OPENSSL_free(ctx->md_data);
1.207 + }
1.208 + ctx->digest=type;
1.209 + if (type->ctx_size)
1.210 + {
1.211 + ctx->md_data=OPENSSL_malloc(type->ctx_size);
1.212 + if(ctx->md_data==NULL)
1.213 + {
1.214 + EVPerr(EVP_F_EVP_DIGESTINIT_EX,ERR_R_MALLOC_FAILURE);
1.215 + return 0;
1.216 + }
1.217 + }
1.218 +
1.219 + }
1.220 +#ifndef OPENSSL_NO_ENGINE
1.221 +skip_to_init:
1.222 +#endif
1.223 + return ctx->digest->init(ctx);
1.224 + }
1.225 +
1.226 +EXPORT_C int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data,
1.227 + size_t count)
1.228 + {
1.229 + return ctx->digest->update(ctx,data,count);
1.230 + }
1.231 +
1.232 +/* The caller can assume that this removes any secret data from the context */
1.233 +EXPORT_C int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
1.234 + {
1.235 + int ret;
1.236 + ret = EVP_DigestFinal_ex(ctx, md, size);
1.237 + EVP_MD_CTX_cleanup(ctx);
1.238 + return ret;
1.239 + }
1.240 +
1.241 +/* The caller can assume that this removes any secret data from the context */
1.242 +EXPORT_C int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size)
1.243 + {
1.244 + int ret;
1.245 +
1.246 + OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE);
1.247 + ret=ctx->digest->final(ctx,md);
1.248 + if (size != NULL)
1.249 + *size=ctx->digest->md_size;
1.250 + if (ctx->digest->cleanup)
1.251 + {
1.252 + ctx->digest->cleanup(ctx);
1.253 + EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED);
1.254 + }
1.255 + if(ctx->md_data)
1.256 + memset(ctx->md_data,0,ctx->digest->ctx_size);
1.257 + return ret;
1.258 + }
1.259 +
1.260 +EXPORT_C int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
1.261 + {
1.262 + EVP_MD_CTX_init(out);
1.263 + return EVP_MD_CTX_copy_ex(out, in);
1.264 + }
1.265 +
1.266 +EXPORT_C int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
1.267 + {
1.268 + unsigned char *tmp_buf;
1.269 + if ((in == NULL) || (in->digest == NULL))
1.270 + {
1.271 + EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,EVP_R_INPUT_NOT_INITIALIZED);
1.272 + return 0;
1.273 + }
1.274 +#ifndef OPENSSL_NO_ENGINE
1.275 + /* Make sure it's safe to copy a digest context using an ENGINE */
1.276 + if (in->engine && !ENGINE_init(in->engine))
1.277 + {
1.278 + EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_ENGINE_LIB);
1.279 + return 0;
1.280 + }
1.281 +#endif
1.282 +
1.283 + if (out->digest == in->digest)
1.284 + {
1.285 + tmp_buf = out->md_data;
1.286 + EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE);
1.287 + }
1.288 + else tmp_buf = NULL;
1.289 + EVP_MD_CTX_cleanup(out);
1.290 + memcpy(out,in,sizeof *out);
1.291 +
1.292 + if (out->digest->ctx_size)
1.293 + {
1.294 + if (tmp_buf) out->md_data = tmp_buf;
1.295 + else out->md_data=OPENSSL_malloc(out->digest->ctx_size);
1.296 + if(out->md_data==NULL||in->md_data==NULL)
1.297 + {
1.298 + EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_MALLOC_FAILURE);
1.299 + return 0;
1.300 + }
1.301 + memcpy(out->md_data,in->md_data,out->digest->ctx_size);
1.302 + }
1.303 +
1.304 + if (out->digest->copy)
1.305 + return out->digest->copy(out,in);
1.306 +
1.307 + return 1;
1.308 + }
1.309 +
1.310 +EXPORT_C int EVP_Digest(const void *data, size_t count,
1.311 + unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl)
1.312 + {
1.313 + EVP_MD_CTX ctx;
1.314 + int ret;
1.315 +
1.316 + EVP_MD_CTX_init(&ctx);
1.317 + EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT);
1.318 + ret=EVP_DigestInit_ex(&ctx, type, impl)
1.319 + && EVP_DigestUpdate(&ctx, data, count)
1.320 + && EVP_DigestFinal_ex(&ctx, md, size);
1.321 + EVP_MD_CTX_cleanup(&ctx);
1.322 +
1.323 + return ret;
1.324 + }
1.325 +
1.326 +EXPORT_C void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx)
1.327 + {
1.328 + EVP_MD_CTX_cleanup(ctx);
1.329 + OPENSSL_free(ctx);
1.330 + }
1.331 +
1.332 +/* This call frees resources associated with the context */
1.333 +EXPORT_C int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
1.334 + {
1.335 + /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final,
1.336 + * because sometimes only copies of the context are ever finalised.
1.337 + */
1.338 + if (ctx->digest && ctx->digest->cleanup
1.339 + && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))
1.340 + ctx->digest->cleanup(ctx);
1.341 + if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
1.342 + && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))
1.343 + {
1.344 + OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);
1.345 + OPENSSL_free(ctx->md_data);
1.346 + }
1.347 +#ifndef OPENSSL_NO_ENGINE
1.348 + if(ctx->engine)
1.349 + /* The EVP_MD we used belongs to an ENGINE, release the
1.350 + * functional reference we held for this reason. */
1.351 + ENGINE_finish(ctx->engine);
1.352 +#endif
1.353 + memset(ctx,'\0',sizeof *ctx);
1.354 +
1.355 + return 1;
1.356 + }