234 lines
8.6 KiB
C
234 lines
8.6 KiB
C
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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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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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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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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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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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if (rv <= 0)
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ASN1error(ERR_R_EVP_LIB);
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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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if (rv == 2) {
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if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) {
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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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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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if (algor1)
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X509_ALGOR_set0(algor1,
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OBJ_nid2obj(signid), paramtype, NULL);
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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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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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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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}
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