234 lines
8.6 KiB
C
Executable File
234 lines
8.6 KiB
C
Executable File
/* $OpenBSD: a_sign.c,v 1.23 2017/05/02 03:59:44 deraadt Exp $ */
|
|
/* 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) 1998-2003 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 <sys/types.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include <openssl/bn.h>
|
|
#include <openssl/buffer.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/objects.h>
|
|
#include <openssl/x509.h>
|
|
|
|
#include "asn1_locl.h"
|
|
|
|
int
|
|
ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
|
|
ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey, const EVP_MD *type)
|
|
{
|
|
EVP_MD_CTX ctx;
|
|
EVP_MD_CTX_init(&ctx);
|
|
if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) {
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
return 0;
|
|
}
|
|
return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
|
|
}
|
|
|
|
|
|
int
|
|
ASN1_item_sign_ctx(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
|
|
ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx)
|
|
{
|
|
const EVP_MD *type;
|
|
EVP_PKEY *pkey;
|
|
unsigned char *buf_in = NULL, *buf_out = NULL;
|
|
size_t inl = 0, outl = 0, outll = 0;
|
|
int signid, paramtype;
|
|
int rv;
|
|
|
|
type = EVP_MD_CTX_md(ctx);
|
|
pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
|
|
|
|
if (!type || !pkey) {
|
|
ASN1error(ASN1_R_CONTEXT_NOT_INITIALISED);
|
|
return 0;
|
|
}
|
|
|
|
if (pkey->ameth->item_sign) {
|
|
rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
|
|
signature);
|
|
if (rv == 1)
|
|
outl = signature->length;
|
|
/* Return value meanings:
|
|
* <=0: error.
|
|
* 1: method does everything.
|
|
* 2: carry on as normal.
|
|
* 3: ASN1 method sets algorithm identifiers: just sign.
|
|
*/
|
|
if (rv <= 0)
|
|
ASN1error(ERR_R_EVP_LIB);
|
|
if (rv <= 1)
|
|
goto err;
|
|
} else
|
|
rv = 2;
|
|
|
|
if (rv == 2) {
|
|
if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) {
|
|
if (!pkey->ameth ||
|
|
!OBJ_find_sigid_by_algs(&signid,
|
|
EVP_MD_nid(type), pkey->ameth->pkey_id)) {
|
|
ASN1error(ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
|
|
return 0;
|
|
}
|
|
} else
|
|
signid = type->pkey_type;
|
|
|
|
if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
|
|
paramtype = V_ASN1_NULL;
|
|
else
|
|
paramtype = V_ASN1_UNDEF;
|
|
|
|
if (algor1)
|
|
X509_ALGOR_set0(algor1,
|
|
OBJ_nid2obj(signid), paramtype, NULL);
|
|
if (algor2)
|
|
X509_ALGOR_set0(algor2,
|
|
OBJ_nid2obj(signid), paramtype, NULL);
|
|
|
|
}
|
|
|
|
inl = ASN1_item_i2d(asn, &buf_in, it);
|
|
outll = outl = EVP_PKEY_size(pkey);
|
|
buf_out = malloc(outl);
|
|
if ((buf_in == NULL) || (buf_out == NULL)) {
|
|
outl = 0;
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!EVP_DigestSignUpdate(ctx, buf_in, inl) ||
|
|
!EVP_DigestSignFinal(ctx, buf_out, &outl)) {
|
|
outl = 0;
|
|
ASN1error(ERR_R_EVP_LIB);
|
|
goto err;
|
|
}
|
|
free(signature->data);
|
|
signature->data = buf_out;
|
|
buf_out = NULL;
|
|
signature->length = outl;
|
|
/* In the interests of compatibility, I'll make sure that
|
|
* the bit string has a 'not-used bits' value of 0
|
|
*/
|
|
signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
|
|
signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
|
|
|
|
err:
|
|
EVP_MD_CTX_cleanup(ctx);
|
|
freezero((char *)buf_in, inl);
|
|
freezero((char *)buf_out, outll);
|
|
return (outl);
|
|
}
|