GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/tasn_utl.c Lines: 79 88 89.8 %
Date: 2017-11-13 Branches: 40 52 76.9 %

Line Branch Exec Source
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/* $OpenBSD: tasn_utl.c,v 1.12 2017/01/29 17:49:22 beck Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 * project 2000.
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 */
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/* ====================================================================
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 * Copyright (c) 2000-2004 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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 *    licensing@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 <stddef.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/objects.h>
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#include <openssl/err.h>
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/* Utility functions for manipulating fields and offsets */
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68
/* Add 'offset' to 'addr' */
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#define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
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/* Given an ASN1_ITEM CHOICE type return
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 * the selector value
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 */
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int
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asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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9140
	int *sel = offset2ptr(*pval, it->utype);
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4570
	return *sel;
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}
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/* Given an ASN1_ITEM CHOICE type set
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 * the selector value, return old value.
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 */
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86
int
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asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it)
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{
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	int *sel, ret;
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3804
	sel = offset2ptr(*pval, it->utype);
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1902
	ret = *sel;
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1902
	*sel = value;
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1902
	return ret;
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}
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/* Do reference counting. The value 'op' decides what to do.
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 * if it is +1 then the count is incremented. If op is 0 count is
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 * set to 1. If op is -1 count is decremented and the return value
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 * is the current refrence count or 0 if no reference count exists.
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 */
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int
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asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
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{
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	const ASN1_AUX *aux;
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	int *lck, ret;
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1444445
	if ((it->itype != ASN1_ITYPE_SEQUENCE) &&
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233
	    (it->itype != ASN1_ITYPE_NDEF_SEQUENCE))
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		return 0;
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722106
	aux = it->funcs;
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819727
	if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT))
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678299
		return 0;
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43807
	lck = offset2ptr(*pval, aux->ref_offset);
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43807
	if (op == 0) {
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13224
		*lck = 1;
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13224
		return 1;
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	}
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30583
	ret = CRYPTO_add(lck, op, aux->ref_lock);
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30583
	return ret;
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722106
}
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static ASN1_ENCODING *
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asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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	const ASN1_AUX *aux;
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128

3934653
	if (!pval || !*pval)
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		return NULL;
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1311551
	aux = it->funcs;
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1457388
	if (!aux || !(aux->flags & ASN1_AFLG_ENCODING))
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1259040
		return NULL;
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52511
	return offset2ptr(*pval, aux->enc_offset);
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1311551
}
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void
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asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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	ASN1_ENCODING *enc;
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705116
	enc = asn1_get_enc_ptr(pval, it);
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352558
	if (enc) {
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13224
		enc->enc = NULL;
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13224
		enc->len = 0;
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13224
		enc->modified = 1;
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13224
	}
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352558
}
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void
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asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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	ASN1_ENCODING *enc;
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154
704348
	enc = asn1_get_enc_ptr(pval, it);
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352174
	if (enc) {
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13209
		free(enc->enc);
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13209
		enc->enc = NULL;
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13209
		enc->len = 0;
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13209
		enc->modified = 1;
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13209
	}
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352174
}
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int
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asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
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    const ASN1_ITEM *it)
166
{
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	ASN1_ENCODING *enc;
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169
491874
	enc = asn1_get_enc_ptr(pval, it);
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245937
	if (!enc)
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232835
		return 1;
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13102
	free(enc->enc);
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13102
	enc->enc = malloc(inlen);
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13102
	if (!enc->enc)
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		return 0;
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13102
	memcpy(enc->enc, in, inlen);
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13102
	enc->len = inlen;
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13102
	enc->modified = 0;
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13102
	return 1;
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245937
}
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int
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asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
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    const ASN1_ITEM *it)
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{
188
	ASN1_ENCODING *enc;
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190
721764
	enc = asn1_get_enc_ptr(pval, it);
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373858
	if (!enc || enc->modified)
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348096
		return 0;
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12786
	if (out) {
194
4686
		memcpy(*out, enc->enc, enc->len);
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4686
		*out += enc->len;
196
4686
	}
197
12786
	if (len)
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12786
		*len = enc->len;
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12786
	return 1;
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360882
}
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202
/* Given an ASN1_TEMPLATE get a pointer to a field */
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ASN1_VALUE **
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asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
205
{
206
	ASN1_VALUE **pvaltmp;
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208
6755330
	if (tt->flags & ASN1_TFLG_COMBINE)
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984
		return pval;
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3376681
	pvaltmp = offset2ptr(*pval, tt->offset);
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	/* NOTE for BOOLEAN types the field is just a plain
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 	 * int so we can't return int **, so settle for
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	 * (int *).
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	 */
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3376681
	return pvaltmp;
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3377665
}
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218
/* Handle ANY DEFINED BY template, find the selector, look up
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 * the relevant ASN1_TEMPLATE in the table and return it.
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 */
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222
const ASN1_TEMPLATE *
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asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr)
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{
225
	const ASN1_ADB *adb;
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	const ASN1_ADB_TABLE *atbl;
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	long selector;
228
	ASN1_VALUE **sfld;
229
	int i;
230
231
5000902
	if (!(tt->flags & ASN1_TFLG_ADB_MASK))
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2493074
		return tt;
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234
	/* Else ANY DEFINED BY ... get the table */
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7377
	adb = (const ASN1_ADB *)tt->item;
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237
	/* Get the selector field */
238
7377
	sfld = offset2ptr(*pval, adb->offset);
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240
	/* Check if NULL */
241
7377
	if (!sfld) {
242
		if (!adb->null_tt)
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			goto err;
244
		return adb->null_tt;
245
	}
246
247
	/* Convert type to a long:
248
	 * NB: don't check for NID_undef here because it
249
	 * might be a legitimate value in the table
250
	 */
251
7377
	if (tt->flags & ASN1_TFLG_ADB_OID)
252
7377
		selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
253
	else
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		selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
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256
	/* Try to find matching entry in table
257
	 * Maybe should check application types first to
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	 * allow application override? Might also be useful
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	 * to have a flag which indicates table is sorted and
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	 * we can do a binary search. For now stick to a
261
	 * linear search.
262
	 */
263
264
28450
	for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++)
265
13858
		if (atbl->value == selector)
266
7010
			return &atbl->tt;
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268
	/* FIXME: need to search application table too */
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270
	/* No match, return default type */
271
367
	if (!adb->default_tt)
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		goto err;
273
367
	return adb->default_tt;
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275
err:
276
	/* FIXME: should log the value or OID of unsupported type */
277
	if (nullerr)
278
		ASN1error(ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
279
	return NULL;
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2500451
}