diff options
Diffstat (limited to 'openssl/crypto/evp/digest.c')
| -rw-r--r-- | openssl/crypto/evp/digest.c | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/openssl/crypto/evp/digest.c b/openssl/crypto/evp/digest.c new file mode 100644 index 000000000..3bc2d1295 --- /dev/null +++ b/openssl/crypto/evp/digest.c @@ -0,0 +1,440 @@ +/* crypto/evp/digest.c */ +/* 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.] + */ +/* ==================================================================== + * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include "cryptlib.h" +#include <openssl/objects.h> +#include <openssl/evp.h> +#ifndef OPENSSL_NO_ENGINE +#include <openssl/engine.h> +#endif +#include "evp_locl.h" + +void EVP_MD_CTX_init(EVP_MD_CTX *ctx) + { + memset(ctx,'\0',sizeof *ctx); + } + +EVP_MD_CTX *EVP_MD_CTX_create(void) + { + EVP_MD_CTX *ctx=OPENSSL_malloc(sizeof *ctx); + + EVP_MD_CTX_init(ctx); + + return ctx; + } + +int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type) + { + EVP_MD_CTX_init(ctx); + return EVP_DigestInit_ex(ctx, type, NULL); + } + +#ifdef OPENSSL_FIPS + +/* The purpose of these is to trap programs that attempt to use non FIPS + * algorithms in FIPS mode and ignore the errors. + */ + +static int bad_init(EVP_MD_CTX *ctx) + { FIPS_ERROR_IGNORED("Digest init"); return 0;} + +static int bad_update(EVP_MD_CTX *ctx,const void *data,size_t count) + { FIPS_ERROR_IGNORED("Digest update"); return 0;} + +static int bad_final(EVP_MD_CTX *ctx,unsigned char *md) + { FIPS_ERROR_IGNORED("Digest Final"); return 0;} + +static const EVP_MD bad_md = + { + 0, + 0, + 0, + 0, + bad_init, + bad_update, + bad_final, + NULL, + NULL, + NULL, + 0, + {0,0,0,0}, + }; + +#endif + +#ifndef OPENSSL_NO_ENGINE + +#ifdef OPENSSL_FIPS + +static int do_engine_null(ENGINE *impl) { return 0;} +static int do_evp_md_engine_null(EVP_MD_CTX *ctx, + const EVP_MD **ptype, ENGINE *impl) + { return 1; } + +static int (*do_engine_init)(ENGINE *impl) + = do_engine_null; + +static int (*do_engine_finish)(ENGINE *impl) + = do_engine_null; + +static int (*do_evp_md_engine) + (EVP_MD_CTX *ctx, const EVP_MD **ptype, ENGINE *impl) + = do_evp_md_engine_null; + +void int_EVP_MD_set_engine_callbacks( + int (*eng_md_init)(ENGINE *impl), + int (*eng_md_fin)(ENGINE *impl), + int (*eng_md_evp) + (EVP_MD_CTX *ctx, const EVP_MD **ptype, ENGINE *impl)) + { + do_engine_init = eng_md_init; + do_engine_finish = eng_md_fin; + do_evp_md_engine = eng_md_evp; + } + +#else + +#define do_engine_init ENGINE_init +#define do_engine_finish ENGINE_finish + +static int do_evp_md_engine(EVP_MD_CTX *ctx, const EVP_MD **ptype, ENGINE *impl) + { + if (*ptype) + { + /* Ensure an ENGINE left lying around from last time is cleared + * (the previous check attempted to avoid this if the same + * ENGINE and EVP_MD could be used). */ + if(ctx->engine) + ENGINE_finish(ctx->engine); + if(impl) + { + if (!ENGINE_init(impl)) + { + EVPerr(EVP_F_DO_EVP_MD_ENGINE,EVP_R_INITIALIZATION_ERROR); + return 0; + } + } + else + /* Ask if an ENGINE is reserved for this job */ + impl = ENGINE_get_digest_engine((*ptype)->type); + if(impl) + { + /* There's an ENGINE for this job ... (apparently) */ + const EVP_MD *d = ENGINE_get_digest(impl, (*ptype)->type); + if(!d) + { + /* Same comment from evp_enc.c */ + EVPerr(EVP_F_DO_EVP_MD_ENGINE,EVP_R_INITIALIZATION_ERROR); + return 0; + } + /* We'll use the ENGINE's private digest definition */ + *ptype = d; + /* Store the ENGINE functional reference so we know + * 'type' came from an ENGINE and we need to release + * it when done. */ + ctx->engine = impl; + } + else + ctx->engine = NULL; + } + else + if(!ctx->digest) + { + EVPerr(EVP_F_DO_EVP_MD_ENGINE,EVP_R_NO_DIGEST_SET); + return 0; + } + return 1; + } + +#endif + +#endif + +int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) + { + M_EVP_MD_CTX_clear_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); +#ifdef OPENSSL_FIPS + if(FIPS_selftest_failed()) + { + FIPSerr(FIPS_F_EVP_DIGESTINIT_EX,FIPS_R_FIPS_SELFTEST_FAILED); + ctx->digest = &bad_md; + return 0; + } +#endif +#ifndef OPENSSL_NO_ENGINE + /* Whether it's nice or not, "Inits" can be used on "Final"'d contexts + * so this context may already have an ENGINE! Try to avoid releasing + * the previous handle, re-querying for an ENGINE, and having a + * reinitialisation, when it may all be unecessary. */ + if (ctx->engine && ctx->digest && (!type || + (type && (type->type == ctx->digest->type)))) + goto skip_to_init; + if (!do_evp_md_engine(ctx, &type, impl)) + return 0; +#endif + if (ctx->digest != type) + { +#ifdef OPENSSL_FIPS + if (FIPS_mode()) + { + if (!(type->flags & EVP_MD_FLAG_FIPS) + && !(ctx->flags & EVP_MD_CTX_FLAG_NON_FIPS_ALLOW)) + { + EVPerr(EVP_F_EVP_DIGESTINIT_EX, EVP_R_DISABLED_FOR_FIPS); + ctx->digest = &bad_md; + return 0; + } + } +#endif + if (ctx->digest && ctx->digest->ctx_size) + OPENSSL_free(ctx->md_data); + ctx->digest=type; + if (type->ctx_size) + ctx->md_data=OPENSSL_malloc(type->ctx_size); + } +#ifndef OPENSSL_NO_ENGINE + skip_to_init: +#endif + return ctx->digest->init(ctx); + } + +int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *data, + size_t count) + { +#ifdef OPENSSL_FIPS + FIPS_selftest_check(); +#endif + return ctx->digest->update(ctx,data,count); + } + +/* The caller can assume that this removes any secret data from the context */ +int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) + { + int ret; + ret = EVP_DigestFinal_ex(ctx, md, size); + EVP_MD_CTX_cleanup(ctx); + return ret; + } + +/* The caller can assume that this removes any secret data from the context */ +int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *size) + { + int ret; +#ifdef OPENSSL_FIPS + FIPS_selftest_check(); +#endif + + OPENSSL_assert(ctx->digest->md_size <= EVP_MAX_MD_SIZE); + ret=ctx->digest->final(ctx,md); + if (size != NULL) + *size=ctx->digest->md_size; + if (ctx->digest->cleanup) + { + ctx->digest->cleanup(ctx); + M_EVP_MD_CTX_set_flags(ctx,EVP_MD_CTX_FLAG_CLEANED); + } + memset(ctx->md_data,0,ctx->digest->ctx_size); + return ret; + } + +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_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) + { + unsigned char *tmp_buf; + if ((in == NULL) || (in->digest == NULL)) + { + EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,EVP_R_INPUT_NOT_INITIALIZED); + return 0; + } +#ifndef OPENSSL_NO_ENGINE + /* Make sure it's safe to copy a digest context using an ENGINE */ + if (in->engine && !do_engine_init(in->engine)) + { + EVPerr(EVP_F_EVP_MD_CTX_COPY_EX,ERR_R_ENGINE_LIB); + return 0; + } +#endif + + if (out->digest == in->digest) + { + tmp_buf = out->md_data; + M_EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE); + } + else tmp_buf = NULL; + EVP_MD_CTX_cleanup(out); + memcpy(out,in,sizeof *out); + + if (out->digest->ctx_size) + { + if (tmp_buf) out->md_data = tmp_buf; + else out->md_data=OPENSSL_malloc(out->digest->ctx_size); + memcpy(out->md_data,in->md_data,out->digest->ctx_size); + } + + if (out->digest->copy) + return out->digest->copy(out,in); + + return 1; + } + +int EVP_Digest(const void *data, size_t count, + unsigned char *md, unsigned int *size, const EVP_MD *type, ENGINE *impl) + { + EVP_MD_CTX ctx; + int ret; + + EVP_MD_CTX_init(&ctx); + M_EVP_MD_CTX_set_flags(&ctx,EVP_MD_CTX_FLAG_ONESHOT); + ret=EVP_DigestInit_ex(&ctx, type, impl) + && EVP_DigestUpdate(&ctx, data, count) + && EVP_DigestFinal_ex(&ctx, md, size); + EVP_MD_CTX_cleanup(&ctx); + + return ret; + } + +void EVP_MD_CTX_destroy(EVP_MD_CTX *ctx) + { + EVP_MD_CTX_cleanup(ctx); + OPENSSL_free(ctx); + } + +/* This call frees resources associated with the context */ +int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) + { + /* Don't assume ctx->md_data was cleaned in EVP_Digest_Final, + * because sometimes only copies of the context are ever finalised. + */ + if (ctx->digest && ctx->digest->cleanup + && !M_EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED)) + ctx->digest->cleanup(ctx); + if (ctx->digest && ctx->digest->ctx_size && ctx->md_data + && !M_EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) + { + OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size); + OPENSSL_free(ctx->md_data); + } +#ifndef OPENSSL_NO_ENGINE + if(ctx->engine) + /* The EVP_MD we used belongs to an ENGINE, release the + * functional reference we held for this reason. */ + do_engine_finish(ctx->engine); +#endif + memset(ctx,'\0',sizeof *ctx); + + return 1; + } |