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/* $OpenBSD: a_sign.c,v 1.23 2017/05/02 03:59:44 deraadt Exp $ */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@openssl.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <sys/types.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <time.h> |
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#include <openssl/bn.h> |
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#include <openssl/buffer.h> |
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#include <openssl/err.h> |
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#include <openssl/evp.h> |
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#include <openssl/objects.h> |
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#include <openssl/x509.h> |
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#include "asn1_locl.h" |
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int |
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ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2, |
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ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey, const EVP_MD *type) |
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{ |
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EVP_MD_CTX ctx; |
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EVP_MD_CTX_init(&ctx); |
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✗✓ |
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if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) { |
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EVP_MD_CTX_cleanup(&ctx); |
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return 0; |
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} |
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return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx); |
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} |
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int |
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ASN1_item_sign_ctx(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2, |
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ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) |
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{ |
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const EVP_MD *type; |
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EVP_PKEY *pkey; |
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unsigned char *buf_in = NULL, *buf_out = NULL; |
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size_t inl = 0, outl = 0, outll = 0; |
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int signid, paramtype; |
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int rv; |
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type = EVP_MD_CTX_md(ctx); |
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pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); |
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✗✓ |
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if (!type || !pkey) { |
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ASN1error(ASN1_R_CONTEXT_NOT_INITIALISED); |
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return 0; |
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} |
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✓✓ |
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if (pkey->ameth->item_sign) { |
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rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, |
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signature); |
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✗✓ |
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if (rv == 1) |
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outl = signature->length; |
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/* Return value meanings: |
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* <=0: error. |
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* 1: method does everything. |
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* 2: carry on as normal. |
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* 3: ASN1 method sets algorithm identifiers: just sign. |
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*/ |
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✗✓ |
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if (rv <= 0) |
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ASN1error(ERR_R_EVP_LIB); |
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✓✗ |
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if (rv <= 1) |
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goto err; |
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} else |
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rv = 2; |
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✓✗ |
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if (rv == 2) { |
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✓✓ |
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if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { |
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✓✗✗✓
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if (!pkey->ameth || |
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!OBJ_find_sigid_by_algs(&signid, |
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EVP_MD_nid(type), pkey->ameth->pkey_id)) { |
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ASN1error(ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); |
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return 0; |
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} |
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} else |
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signid = type->pkey_type; |
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✓✓ |
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if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) |
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paramtype = V_ASN1_NULL; |
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else |
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paramtype = V_ASN1_UNDEF; |
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✓✗ |
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if (algor1) |
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X509_ALGOR_set0(algor1, |
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OBJ_nid2obj(signid), paramtype, NULL); |
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✓✓ |
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if (algor2) |
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X509_ALGOR_set0(algor2, |
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OBJ_nid2obj(signid), paramtype, NULL); |
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} |
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inl = ASN1_item_i2d(asn, &buf_in, it); |
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outll = outl = EVP_PKEY_size(pkey); |
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buf_out = malloc(outl); |
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✗✓ |
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if ((buf_in == NULL) || (buf_out == NULL)) { |
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outl = 0; |
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ASN1error(ERR_R_MALLOC_FAILURE); |
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goto err; |
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} |
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✓✗✗✓
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if (!EVP_DigestSignUpdate(ctx, buf_in, inl) || |
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!EVP_DigestSignFinal(ctx, buf_out, &outl)) { |
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outl = 0; |
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ASN1error(ERR_R_EVP_LIB); |
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goto err; |
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} |
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free(signature->data); |
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signature->data = buf_out; |
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buf_out = NULL; |
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signature->length = outl; |
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/* In the interests of compatibility, I'll make sure that |
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* the bit string has a 'not-used bits' value of 0 |
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*/ |
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signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
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signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; |
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err: |
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EVP_MD_CTX_cleanup(ctx); |
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freezero((char *)buf_in, inl); |
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freezero((char *)buf_out, outll); |
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return (outl); |
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} |