mirror of
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640 lines
16 KiB
C
Executable File
640 lines
16 KiB
C
Executable File
/* $OpenBSD: asn1_item.c,v 1.4 2022/01/14 08:38:05 tb 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 <limits.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/x509.h>
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#include "asn1_locl.h"
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#include "evp_locl.h"
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/*
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* ASN1_ITEM version of dup: this follows the model above except we don't need
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* to allocate the buffer. At some point this could be rewritten to directly dup
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* the underlying structure instead of doing and encode and decode.
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*/
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int
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ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *type, void *asn,
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unsigned char *md, unsigned int *len)
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{
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int i;
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unsigned char *str = NULL;
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i = ASN1_item_i2d(asn, &str, it);
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if (!str)
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return (0);
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if (!EVP_Digest(str, i, md, len, type, NULL)) {
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free(str);
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return (0);
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}
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free(str);
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return (1);
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}
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void *
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ASN1_item_dup(const ASN1_ITEM *it, void *x)
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{
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unsigned char *b = NULL;
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const unsigned char *p;
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long i;
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void *ret;
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if (x == NULL)
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return (NULL);
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i = ASN1_item_i2d(x, &b, it);
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if (b == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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p = b;
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ret = ASN1_item_d2i(NULL, &p, i, it);
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free(b);
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return (ret);
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}
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/* Pack an ASN1 object into an ASN1_STRING. */
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ASN1_STRING *
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ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
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{
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ASN1_STRING *octmp;
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if (!oct || !*oct) {
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if (!(octmp = ASN1_STRING_new ())) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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} else
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octmp = *oct;
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free(octmp->data);
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octmp->data = NULL;
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if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
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ASN1error(ASN1_R_ENCODE_ERROR);
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goto err;
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}
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if (!octmp->data) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (oct)
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*oct = octmp;
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return octmp;
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err:
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if (!oct || octmp != *oct)
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ASN1_STRING_free(octmp);
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return NULL;
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}
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/* Extract an ASN1 object from an ASN1_STRING. */
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void *
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ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it)
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{
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const unsigned char *p;
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void *ret;
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p = oct->data;
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if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
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ASN1error(ASN1_R_DECODE_ERROR);
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return ret;
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}
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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 (!pkey->ameth ||
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!OBJ_find_sigid_by_algs(&signid, EVP_MD_nid(type),
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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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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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int
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ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a,
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ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey)
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{
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EVP_MD_CTX ctx;
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unsigned char *buf_in = NULL;
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int ret = -1, inl;
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int mdnid, pknid;
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if (!pkey) {
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ASN1error(ERR_R_PASSED_NULL_PARAMETER);
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return -1;
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}
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if (signature->type == V_ASN1_BIT_STRING && signature->flags & 0x7)
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{
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ASN1error(ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
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return -1;
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}
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EVP_MD_CTX_init(&ctx);
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/* Convert signature OID into digest and public key OIDs */
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if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) {
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ASN1error(ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
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goto err;
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}
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if (mdnid == NID_undef) {
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if (!pkey->ameth || !pkey->ameth->item_verify) {
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ASN1error(ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
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goto err;
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}
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ret = pkey->ameth->item_verify(&ctx, it, asn, a,
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signature, pkey);
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/* Return value of 2 means carry on, anything else means we
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* exit straight away: either a fatal error of the underlying
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* verification routine handles all verification.
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*/
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if (ret != 2)
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goto err;
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ret = -1;
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} else {
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const EVP_MD *type;
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type = EVP_get_digestbynid(mdnid);
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if (type == NULL) {
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ASN1error(ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
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goto err;
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}
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/* Check public key OID matches public key type */
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if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) {
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ASN1error(ASN1_R_WRONG_PUBLIC_KEY_TYPE);
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goto err;
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}
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if (!EVP_DigestVerifyInit(&ctx, NULL, type, NULL, pkey)) {
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ASN1error(ERR_R_EVP_LIB);
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ret = 0;
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goto err;
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}
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}
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inl = ASN1_item_i2d(asn, &buf_in, it);
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if (buf_in == NULL) {
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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_DigestVerifyUpdate(&ctx, buf_in, inl)) {
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ASN1error(ERR_R_EVP_LIB);
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ret = 0;
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goto err;
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}
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freezero(buf_in, (unsigned int)inl);
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if (EVP_DigestVerifyFinal(&ctx, signature->data,
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(size_t)signature->length) <= 0) {
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ASN1error(ERR_R_EVP_LIB);
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ret = 0;
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goto err;
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}
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/* we don't need to zero the 'ctx' because we just checked
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* public information */
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/* memset(&ctx,0,sizeof(ctx)); */
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ret = 1;
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err:
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EVP_MD_CTX_cleanup(&ctx);
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return (ret);
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}
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#define HEADER_SIZE 8
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#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024)
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int
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asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
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{
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BUF_MEM *b;
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unsigned char *p;
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const unsigned char *q;
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long slen;
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int i, inf, tag, xclass;
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size_t want = HEADER_SIZE;
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int eos = 0;
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size_t off = 0;
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size_t len = 0;
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b = BUF_MEM_new();
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if (b == NULL) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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return -1;
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}
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ERR_clear_error();
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for (;;) {
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if (want >= (len - off)) {
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want -= (len - off);
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if (len + want < len ||
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!BUF_MEM_grow_clean(b, len + want)) {
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ASN1error(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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i = BIO_read(in, &(b->data[len]), want);
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if ((i < 0) && ((len - off) == 0)) {
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ASN1error(ASN1_R_NOT_ENOUGH_DATA);
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goto err;
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}
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if (i > 0) {
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if (len + i < len) {
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ASN1error(ASN1_R_TOO_LONG);
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goto err;
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}
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len += i;
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}
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}
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/* else data already loaded */
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p = (unsigned char *) & (b->data[off]);
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q = p;
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inf = ASN1_get_object(&q, &slen, &tag, &xclass, len - off);
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if (inf & 0x80) {
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unsigned long e;
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e = ERR_GET_REASON(ERR_peek_error());
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if (e != ASN1_R_TOO_LONG)
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goto err;
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else
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ERR_clear_error(); /* clear error */
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}
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i = q - p; /* header length */
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off += i; /* end of data */
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if (inf & 1) {
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/* no data body so go round again */
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eos++;
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if (eos < 0) {
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ASN1error(ASN1_R_HEADER_TOO_LONG);
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goto err;
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}
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want = HEADER_SIZE;
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} else if (eos && slen == 0 && tag == V_ASN1_EOC) {
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/* eos value, so go back and read another header */
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eos--;
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if (eos <= 0)
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break;
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else
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want = HEADER_SIZE;
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} else {
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/* suck in slen bytes of data */
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want = slen;
|
|
if (want > (len - off)) {
|
|
size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE;
|
|
|
|
want -= (len - off);
|
|
if (want > INT_MAX /* BIO_read takes an int length */ ||
|
|
len+want < len) {
|
|
ASN1error(ASN1_R_TOO_LONG);
|
|
goto err;
|
|
}
|
|
while (want > 0) {
|
|
/*
|
|
* Read content in chunks of increasing size
|
|
* so we can return an error for EOF without
|
|
* having to allocate the entire content length
|
|
* in one go.
|
|
*/
|
|
size_t chunk = want > chunk_max ? chunk_max : want;
|
|
|
|
if (!BUF_MEM_grow_clean(b, len + chunk)) {
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
want -= chunk;
|
|
while (chunk > 0) {
|
|
i = BIO_read(in, &(b->data[len]), chunk);
|
|
if (i <= 0) {
|
|
ASN1error(ASN1_R_NOT_ENOUGH_DATA);
|
|
goto err;
|
|
}
|
|
/*
|
|
* This can't overflow because |len+want|
|
|
* didn't overflow.
|
|
*/
|
|
len += i;
|
|
chunk -= i;
|
|
}
|
|
if (chunk_max < INT_MAX/2)
|
|
chunk_max *= 2;
|
|
}
|
|
}
|
|
if (off + slen < off) {
|
|
ASN1error(ASN1_R_TOO_LONG);
|
|
goto err;
|
|
}
|
|
off += slen;
|
|
if (eos <= 0) {
|
|
break;
|
|
} else
|
|
want = HEADER_SIZE;
|
|
}
|
|
}
|
|
|
|
if (off > INT_MAX) {
|
|
ASN1error(ASN1_R_TOO_LONG);
|
|
goto err;
|
|
}
|
|
|
|
*pb = b;
|
|
return off;
|
|
|
|
err:
|
|
if (b != NULL)
|
|
BUF_MEM_free(b);
|
|
return -1;
|
|
}
|
|
|
|
void *
|
|
ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
|
|
{
|
|
BUF_MEM *b = NULL;
|
|
const unsigned char *p;
|
|
void *ret = NULL;
|
|
int len;
|
|
|
|
len = asn1_d2i_read_bio(in, &b);
|
|
if (len < 0)
|
|
goto err;
|
|
|
|
p = (const unsigned char *)b->data;
|
|
ret = ASN1_item_d2i(x, &p, len, it);
|
|
|
|
err:
|
|
if (b != NULL)
|
|
BUF_MEM_free(b);
|
|
return (ret);
|
|
}
|
|
|
|
void *
|
|
ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
|
|
{
|
|
BIO *b;
|
|
char *ret;
|
|
|
|
if ((b = BIO_new(BIO_s_file())) == NULL) {
|
|
ASN1error(ERR_R_BUF_LIB);
|
|
return (NULL);
|
|
}
|
|
BIO_set_fp(b, in, BIO_NOCLOSE);
|
|
ret = ASN1_item_d2i_bio(it, b, x);
|
|
BIO_free(b);
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
ASN1_item_i2d_bio(const ASN1_ITEM *it, BIO *out, void *x)
|
|
{
|
|
unsigned char *b = NULL;
|
|
int i, j = 0, n, ret = 1;
|
|
|
|
n = ASN1_item_i2d(x, &b, it);
|
|
if (b == NULL) {
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
|
return (0);
|
|
}
|
|
|
|
for (;;) {
|
|
i = BIO_write(out, &(b[j]), n);
|
|
if (i == n)
|
|
break;
|
|
if (i <= 0) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
j += i;
|
|
n -= i;
|
|
}
|
|
free(b);
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
ASN1_item_i2d_fp(const ASN1_ITEM *it, FILE *out, void *x)
|
|
{
|
|
BIO *b;
|
|
int ret;
|
|
|
|
if ((b = BIO_new(BIO_s_file())) == NULL) {
|
|
ASN1error(ERR_R_BUF_LIB);
|
|
return (0);
|
|
}
|
|
BIO_set_fp(b, out, BIO_NOCLOSE);
|
|
ret = ASN1_item_i2d_bio(it, b, x);
|
|
BIO_free(b);
|
|
return (ret);
|
|
}
|