X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fx509%2Fx_x509.c;h=6783fd872849fd92e2f7bf6b7f88304e45fc7f7a;hp=11e758be807648481e83e385f801dc1ab05df3df;hb=7af42628c1f2864cd73659245742baabdb1a449f;hpb=25a807bcb9509c6fccfbbd9d02119772ccb0f23e diff --git a/crypto/x509/x_x509.c b/crypto/x509/x_x509.c index 11e758be80..6783fd8728 100644 --- a/crypto/x509/x_x509.c +++ b/crypto/x509/x_x509.c @@ -1,58 +1,10 @@ -/* 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. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * - * 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.] + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include @@ -91,6 +43,7 @@ static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, case ASN1_OP_NEW_POST: ret->ex_flags = 0; ret->ex_pathlen = -1; + ret->ex_pcpathlen = -1; ret->skid = NULL; ret->akid = NULL; #ifndef OPENSSL_NO_RFC3779 @@ -181,17 +134,32 @@ X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length) return NULL; } -int i2d_X509_AUX(X509 *a, unsigned char **pp) +/* + * Serialize trusted certificate to *pp or just return the required buffer + * length if pp == NULL. We ultimately want to avoid modifying *pp in the + * error path, but that depends on similar hygiene in lower-level functions. + * Here we avoid compounding the problem. + */ +static int i2d_x509_aux_internal(X509 *a, unsigned char **pp) { int length, tmplen; - unsigned char *start = *pp; + unsigned char *start = pp != NULL ? *pp : NULL; + + OPENSSL_assert(pp == NULL || *pp != NULL); + + /* + * This might perturb *pp on error, but fixing that belongs in i2d_X509() + * not here. It should be that if a == NULL length is zero, but we check + * both just in case. + */ length = i2d_X509(a, pp); - if (length < 0 || a == NULL) + if (length <= 0 || a == NULL) return length; tmplen = i2d_X509_CERT_AUX(a->aux, pp); if (tmplen < 0) { - *pp = start; + if (start != NULL) + *pp = start; return tmplen; } length += tmplen; @@ -199,13 +167,50 @@ int i2d_X509_AUX(X509 *a, unsigned char **pp) return length; } +/* + * Serialize trusted certificate to *pp, or just return the required buffer + * length if pp == NULL. + * + * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since + * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do + * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the + * allocated buffer. + */ +int i2d_X509_AUX(X509 *a, unsigned char **pp) +{ + int length; + unsigned char *tmp; + + /* Buffer provided by caller */ + if (pp == NULL || *pp != NULL) + return i2d_x509_aux_internal(a, pp); + + /* Obtain the combined length */ + if ((length = i2d_x509_aux_internal(a, NULL)) <= 0) + return length; + + /* Allocate requisite combined storage */ + *pp = tmp = OPENSSL_malloc(length); + if (tmp == NULL) + return -1; /* Push error onto error stack? */ + + /* Encode, but keep *pp at the originally malloced pointer */ + length = i2d_x509_aux_internal(a, &tmp); + if (length <= 0) { + OPENSSL_free(*pp); + *pp = NULL; + } + return length; +} + int i2d_re_X509_tbs(X509 *x, unsigned char **pp) { x->cert_info.enc.modified = 1; return i2d_X509_CINF(&x->cert_info, pp); } -void X509_get0_signature(ASN1_BIT_STRING **psig, X509_ALGOR **palg, X509 *x) +void X509_get0_signature(const ASN1_BIT_STRING **psig, + const X509_ALGOR **palg, const X509 *x) { if (psig) *psig = &x->signature;