Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/asn1/tasn_enc.c	Lines:	219	253	86.6 %
Date:	2017-11-13	Branches:	149	188	79.3 %


/* $OpenBSD: tasn_enc.c,v 1.21 2016/12/30 16:04:34 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000-2004 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
 *    licensing@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 <stddef.h>
#include <string.h>

#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/objects.h>

static int asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
    const ASN1_ITEM *it, int tag, int aclass);
static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out,
    int skcontlen, const ASN1_ITEM *item, int do_sort, int iclass);
static int asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
    const ASN1_TEMPLATE *tt, int tag, int aclass);
static int asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out,
    const ASN1_ITEM *it, int flags);
static int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype,
    const ASN1_ITEM *it);

/* Top level i2d equivalents: the 'ndef' variant instructs the encoder
 * to use indefinite length constructed encoding, where appropriate
 */

int
ASN1_item_ndef_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it)
{
	return asn1_item_flags_i2d(val, out, it, ASN1_TFLG_NDEF);
}

int
ASN1_item_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it)
{
	return asn1_item_flags_i2d(val, out, it, 0);
}

/* Encode an ASN1 item, this is use by the
 * standard 'i2d' function. 'out' points to
 * a buffer to output the data to.
 *
 * The new i2d has one additional feature. If the output
 * buffer is NULL (i.e. *out == NULL) then a buffer is
 * allocated and populated with the encoding.
 */

static int
asn1_item_flags_i2d(ASN1_VALUE *val, unsigned char **out, const ASN1_ITEM *it,
    int flags)
{
	if (out && !*out) {
		unsigned char *p, *buf;
		int len;
		len = ASN1_item_ex_i2d(&val, NULL, it, -1, flags);
		if (len <= 0)
			return len;
		buf = malloc(len);
		if (!buf)
			return -1;
		p = buf;
		ASN1_item_ex_i2d(&val, &p, it, -1, flags);
		*out = buf;
		return len;
	}

	return ASN1_item_ex_i2d(&val, out, it, -1, flags);
}

/* Encode an item, taking care of IMPLICIT tagging (if any).
 * This function performs the normal item handling: it can be
 * used in external types.
 */

int
ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
    int tag, int aclass)
{
	const ASN1_TEMPLATE *tt = NULL;
	int i, seqcontlen, seqlen, ndef = 1;
	const ASN1_EXTERN_FUNCS *ef;
	const ASN1_AUX *aux = it->funcs;
	ASN1_aux_cb *asn1_cb = NULL;

	if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
		return 0;

	if (aux && aux->asn1_cb)
		asn1_cb = aux->asn1_cb;

	switch (it->itype) {

	case ASN1_ITYPE_PRIMITIVE:
		if (it->templates)
			return asn1_template_ex_i2d(pval, out, it->templates,
			    tag, aclass);
		return asn1_i2d_ex_primitive(pval, out, it, tag, aclass);
		break;

	case ASN1_ITYPE_MSTRING:
		return asn1_i2d_ex_primitive(pval, out, it, -1, aclass);

	case ASN1_ITYPE_CHOICE:
		if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
			return 0;
		i = asn1_get_choice_selector(pval, it);
		if ((i >= 0) && (i < it->tcount)) {
			ASN1_VALUE **pchval;
			const ASN1_TEMPLATE *chtt;
			chtt = it->templates + i;
			pchval = asn1_get_field_ptr(pval, chtt);
			return asn1_template_ex_i2d(pchval, out, chtt,
			    -1, aclass);
		}
		/* Fixme: error condition if selector out of range */
		if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
			return 0;
		break;

	case ASN1_ITYPE_EXTERN:
		/* If new style i2d it does all the work */
		ef = it->funcs;
		return ef->asn1_ex_i2d(pval, out, it, tag, aclass);

	case ASN1_ITYPE_NDEF_SEQUENCE:
		/* Use indefinite length constructed if requested */
		if (aclass & ASN1_TFLG_NDEF)
			ndef = 2;
		/* fall through */

	case ASN1_ITYPE_SEQUENCE:
		i = asn1_enc_restore(&seqcontlen, out, pval, it);
		/* An error occurred */
		if (i < 0)
			return 0;
		/* We have a valid cached encoding... */
		if (i > 0)
			return seqcontlen;
		/* Otherwise carry on */
		seqcontlen = 0;
		/* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
		if (tag == -1) {
			tag = V_ASN1_SEQUENCE;
			/* Retain any other flags in aclass */
			aclass = (aclass & ~ASN1_TFLG_TAG_CLASS) |
			    V_ASN1_UNIVERSAL;
		}
		if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
			return 0;
		/* First work out sequence content length */
		for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
			const ASN1_TEMPLATE *seqtt;
			ASN1_VALUE **pseqval;
			seqtt = asn1_do_adb(pval, tt, 1);
			if (!seqtt)
				return 0;
			pseqval = asn1_get_field_ptr(pval, seqtt);
			/* FIXME: check for errors in enhanced version */
			seqcontlen += asn1_template_ex_i2d(pseqval, NULL, seqtt,
			    -1, aclass);
		}

		seqlen = ASN1_object_size(ndef, seqcontlen, tag);
		if (!out)
			return seqlen;
		/* Output SEQUENCE header */
		ASN1_put_object(out, ndef, seqcontlen, tag, aclass);
		for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
			const ASN1_TEMPLATE *seqtt;
			ASN1_VALUE **pseqval;
			seqtt = asn1_do_adb(pval, tt, 1);
			if (!seqtt)
				return 0;
			pseqval = asn1_get_field_ptr(pval, seqtt);
			/* FIXME: check for errors in enhanced version */
			asn1_template_ex_i2d(pseqval, out, seqtt, -1, aclass);
		}
		if (ndef == 2)
			ASN1_put_eoc(out);
		if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
			return 0;
		return seqlen;

	default:
		return 0;

	}
	return 0;
}

int
ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out,
    const ASN1_TEMPLATE *tt)
{
	return asn1_template_ex_i2d(pval, out, tt, -1, 0);
}

static int
asn1_template_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
    const ASN1_TEMPLATE *tt, int tag, int iclass)
{
	int i, ret, flags, ttag, tclass, ndef;
	flags = tt->flags;
	/* Work out tag and class to use: tagging may come
	 * either from the template or the arguments, not both
	 * because this would create ambiguity. Additionally
	 * the iclass argument may contain some additional flags
	 * which should be noted and passed down to other levels.
	 */
	if (flags & ASN1_TFLG_TAG_MASK) {
		/* Error if argument and template tagging */
		if (tag != -1)
			/* FIXME: error code here */
			return -1;
		/* Get tagging from template */
		ttag = tt->tag;
		tclass = flags & ASN1_TFLG_TAG_CLASS;
	} else if (tag != -1) {
		/* No template tagging, get from arguments */
		ttag = tag;
		tclass = iclass & ASN1_TFLG_TAG_CLASS;
	} else {
		ttag = -1;
		tclass = 0;
	}
	/*
	 * Remove any class mask from iflag.
	 */
	iclass &= ~ASN1_TFLG_TAG_CLASS;

	/* At this point 'ttag' contains the outer tag to use,
	 * 'tclass' is the class and iclass is any flags passed
	 * to this function.
	 */

	/* if template and arguments require ndef, use it */
	if ((flags & ASN1_TFLG_NDEF) && (iclass & ASN1_TFLG_NDEF))
		ndef = 2;
	else
		ndef = 1;

	if (flags & ASN1_TFLG_SK_MASK) {
		/* SET OF, SEQUENCE OF */
		STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
		int isset, sktag, skaclass;
		int skcontlen, sklen;
		ASN1_VALUE *skitem;

		if (!*pval)
			return 0;

		if (flags & ASN1_TFLG_SET_OF) {
			isset = 1;
			/* 2 means we reorder */
			if (flags & ASN1_TFLG_SEQUENCE_OF)
				isset = 2;
		} else
			isset = 0;

		/* Work out inner tag value: if EXPLICIT
		 * or no tagging use underlying type.
		 */
		if ((ttag != -1) && !(flags & ASN1_TFLG_EXPTAG)) {
			sktag = ttag;
			skaclass = tclass;
		} else {
			skaclass = V_ASN1_UNIVERSAL;
			if (isset)
				sktag = V_ASN1_SET;
			else
				sktag = V_ASN1_SEQUENCE;
		}

		/* Determine total length of items */
		skcontlen = 0;
		for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
			skitem = sk_ASN1_VALUE_value(sk, i);
			skcontlen += ASN1_item_ex_i2d(&skitem, NULL,
			    tt->item, -1, iclass);
		}
		sklen = ASN1_object_size(ndef, skcontlen, sktag);
		/* If EXPLICIT need length of surrounding tag */
		if (flags & ASN1_TFLG_EXPTAG)
			ret = ASN1_object_size(ndef, sklen, ttag);
		else
			ret = sklen;

		if (!out)
			return ret;

		/* Now encode this lot... */
		/* EXPLICIT tag */
		if (flags & ASN1_TFLG_EXPTAG)
			ASN1_put_object(out, ndef, sklen, ttag, tclass);
		/* SET or SEQUENCE and IMPLICIT tag */
		ASN1_put_object(out, ndef, skcontlen, sktag, skaclass);
		/* And the stuff itself */
		asn1_set_seq_out(sk, out, skcontlen, tt->item,
		    isset, iclass);
		if (ndef == 2) {
			ASN1_put_eoc(out);
			if (flags & ASN1_TFLG_EXPTAG)
				ASN1_put_eoc(out);
		}

		return ret;
	}

	if (flags & ASN1_TFLG_EXPTAG) {
		/* EXPLICIT tagging */
		/* Find length of tagged item */
		i = ASN1_item_ex_i2d(pval, NULL, tt->item,
		    -1, iclass);
		if (!i)
			return 0;
		/* Find length of EXPLICIT tag */
		ret = ASN1_object_size(ndef, i, ttag);
		if (out) {
			/* Output tag and item */
			ASN1_put_object(out, ndef, i, ttag, tclass);
			ASN1_item_ex_i2d(pval, out, tt->item,
			    -1, iclass);
			if (ndef == 2)
				ASN1_put_eoc(out);
		}
		return ret;
	}

	/* Either normal or IMPLICIT tagging: combine class and flags */
	return ASN1_item_ex_i2d(pval, out, tt->item,
	    ttag, tclass | iclass);
}

/* Temporary structure used to hold DER encoding of items for SET OF */

typedef	struct {
	unsigned char *data;
	int length;
	ASN1_VALUE *field;
} DER_ENC;

static int
der_cmp(const void *a, const void *b)
{
	const DER_ENC *d1 = a, *d2 = b;
	int cmplen, i;

	cmplen = (d1->length < d2->length) ? d1->length : d2->length;
	i = memcmp(d1->data, d2->data, cmplen);
	if (i)
		return i;
	return d1->length - d2->length;
}

/* Output the content octets of SET OF or SEQUENCE OF */

static int
asn1_set_seq_out(STACK_OF(ASN1_VALUE) *sk, unsigned char **out, int skcontlen,
    const ASN1_ITEM *item, int do_sort, int iclass)
{
	int i;
	ASN1_VALUE *skitem;
	unsigned char *tmpdat = NULL, *p = NULL;
	DER_ENC *derlst = NULL, *tder;

	if (do_sort) {
		/* Don't need to sort less than 2 items */
		if (sk_ASN1_VALUE_num(sk) < 2)
			do_sort = 0;
		else {
			derlst = reallocarray(NULL, sk_ASN1_VALUE_num(sk),
			    sizeof(*derlst));
			tmpdat = malloc(skcontlen);
			if (!derlst || !tmpdat) {
				free(derlst);
				free(tmpdat);
				return 0;
			}
		}
	}
	/* If not sorting just output each item */
	if (!do_sort) {
		for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
			skitem = sk_ASN1_VALUE_value(sk, i);
			ASN1_item_ex_i2d(&skitem, out, item, -1, iclass);
		}
		return 1;
	}
	p = tmpdat;

	/* Doing sort: build up a list of each member's DER encoding */
	for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
		skitem = sk_ASN1_VALUE_value(sk, i);
		tder->data = p;
		tder->length = ASN1_item_ex_i2d(&skitem, &p, item, -1, iclass);
		tder->field = skitem;
	}

	/* Now sort them */
	qsort(derlst, sk_ASN1_VALUE_num(sk), sizeof(*derlst), der_cmp);
	/* Output sorted DER encoding */
	p = *out;
	for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
		memcpy(p, tder->data, tder->length);
		p += tder->length;
	}
	*out = p;
	/* If do_sort is 2 then reorder the STACK */
	if (do_sort == 2) {
		for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++)
			(void)sk_ASN1_VALUE_set(sk, i, tder->field);
	}
	free(derlst);
	free(tmpdat);
	return 1;
}

static int
asn1_i2d_ex_primitive(ASN1_VALUE **pval, unsigned char **out,
    const ASN1_ITEM *it, int tag, int aclass)
{
	int len;
	int utype;
	int usetag;
	int ndef = 0;

	utype = it->utype;

	/* Get length of content octets and maybe find
	 * out the underlying type.
	 */

	len = asn1_ex_i2c(pval, NULL, &utype, it);

	/* If SEQUENCE, SET or OTHER then header is
	 * included in pseudo content octets so don't
	 * include tag+length. We need to check here
	 * because the call to asn1_ex_i2c() could change
	 * utype.
	 */
	if ((utype == V_ASN1_SEQUENCE) || (utype == V_ASN1_SET) ||
	    (utype == V_ASN1_OTHER))
		usetag = 0;
	else
		usetag = 1;

	/* -1 means omit type */
	if (len == -1)
		return 0;

	/* -2 return is special meaning use ndef */
	if (len == -2) {
		ndef = 2;
		len = 0;
	}

	/* If not implicitly tagged get tag from underlying type */
	if (tag == -1)
		tag = utype;

	/* Output tag+length followed by content octets */
	if (out) {
		if (usetag)
			ASN1_put_object(out, ndef, len, tag, aclass);
		asn1_ex_i2c(pval, *out, &utype, it);
		if (ndef)
			ASN1_put_eoc(out);
		else
			*out += len;
	}

	if (usetag)
		return ASN1_object_size(ndef, len, tag);
	return len;
}

/* Produce content octets from a structure */

static int
asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cout, int *putype,
    const ASN1_ITEM *it)
{
	ASN1_BOOLEAN *tbool = NULL;
	ASN1_STRING *strtmp;
	ASN1_OBJECT *otmp;
	int utype;
	const unsigned char *cont;
	unsigned char c;
	int len;
	const ASN1_PRIMITIVE_FUNCS *pf;

	pf = it->funcs;
	if (pf && pf->prim_i2c)
		return pf->prim_i2c(pval, cout, putype, it);

	/* Should type be omitted? */
	if ((it->itype != ASN1_ITYPE_PRIMITIVE) ||
	    (it->utype != V_ASN1_BOOLEAN)) {
		if (!*pval)
			return -1;
	}

	if (it->itype == ASN1_ITYPE_MSTRING) {
		/* If MSTRING type set the underlying type */
		strtmp = (ASN1_STRING *)*pval;
		utype = strtmp->type;
		*putype = utype;
	} else if (it->utype == V_ASN1_ANY) {
		/* If ANY set type and pointer to value */
		ASN1_TYPE *typ;
		typ = (ASN1_TYPE *)*pval;
		utype = typ->type;
		*putype = utype;
		pval = &typ->value.asn1_value;
	} else
		utype = *putype;

	switch (utype) {
	case V_ASN1_OBJECT:
		otmp = (ASN1_OBJECT *)*pval;
		cont = otmp->data;
		len = otmp->length;
		break;

	case V_ASN1_NULL:
		cont = NULL;
		len = 0;
		break;

	case V_ASN1_BOOLEAN:
		tbool = (ASN1_BOOLEAN *)pval;
		if (*tbool == -1)
			return -1;
		if (it->utype != V_ASN1_ANY) {
			/* Default handling if value == size field then omit */
			if (*tbool && (it->size > 0))
				return -1;
			if (!*tbool && !it->size)
				return -1;
		}
		c = (unsigned char)*tbool;
		cont = &c;
		len = 1;
		break;

	case V_ASN1_BIT_STRING:
		return i2c_ASN1_BIT_STRING((ASN1_BIT_STRING *)*pval,
		    cout ? &cout : NULL);
		break;

	case V_ASN1_INTEGER:
	case V_ASN1_ENUMERATED:
		/* These are all have the same content format
		 * as ASN1_INTEGER
		 */
		return i2c_ASN1_INTEGER((ASN1_INTEGER *)*pval,
		    cout ? &cout : NULL);
		break;

	case V_ASN1_OCTET_STRING:
	case V_ASN1_NUMERICSTRING:
	case V_ASN1_PRINTABLESTRING:
	case V_ASN1_T61STRING:
	case V_ASN1_VIDEOTEXSTRING:
	case V_ASN1_IA5STRING:
	case V_ASN1_UTCTIME:
	case V_ASN1_GENERALIZEDTIME:
	case V_ASN1_GRAPHICSTRING:
	case V_ASN1_VISIBLESTRING:
	case V_ASN1_GENERALSTRING:
	case V_ASN1_UNIVERSALSTRING:
	case V_ASN1_BMPSTRING:
	case V_ASN1_UTF8STRING:
	case V_ASN1_SEQUENCE:
	case V_ASN1_SET:
	default:
		/* All based on ASN1_STRING and handled the same */
		strtmp = (ASN1_STRING *)*pval;
		/* Special handling for NDEF */
		if ((it->size == ASN1_TFLG_NDEF) &&
		    (strtmp->flags & ASN1_STRING_FLAG_NDEF)) {
			if (cout) {
				strtmp->data = cout;
				strtmp->length = 0;
			}
			/* Special return code */
			return -2;
		}
		cont = strtmp->data;
		len = strtmp->length;

		break;

	}
	if (cout && len)
		memcpy(cout, cont, len);
	return len;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: tasn_enc.c,v 1.21 2016/12/30 16:04:34 jsing Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 2000.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2000-2004 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stddef.h>
60			#include <string.h>
61
62			#include <openssl/asn1.h>
63			#include <openssl/asn1t.h>
64			#include <openssl/objects.h>
65
66			static int asn1_i2d_ex_primitive(ASN1_VALUE pval, unsigned char out,
67			const ASN1_ITEM *it, int tag, int aclass);
68			static int asn1_set_seq_out(STACK_OF(ASN1_VALUE) sk, unsigned char *out,
69			int skcontlen, const ASN1_ITEM *item, int do_sort, int iclass);
70			static int asn1_template_ex_i2d(ASN1_VALUE pval, unsigned char out,
71			const ASN1_TEMPLATE *tt, int tag, int aclass);
72			static int asn1_item_flags_i2d(ASN1_VALUE val, unsigned char *out,
73			const ASN1_ITEM *it, int flags);
74			static int asn1_ex_i2c(ASN1_VALUE *pval, unsigned char cout, int *putype,
75			const ASN1_ITEM *it);
76
77			/* Top level i2d equivalents: the 'ndef' variant instructs the encoder
78			* to use indefinite length constructed encoding, where appropriate
79			*/
80
81			int
82			ASN1_item_ndef_i2d(ASN1_VALUE val, unsigned char out, const ASN1_ITEM it)
83			{
84			return asn1_item_flags_i2d(val, out, it, ASN1_TFLG_NDEF);
85			}
86
87			int
88			ASN1_item_i2d(ASN1_VALUE val, unsigned char out, const ASN1_ITEM it)
89			{
90		20496	return asn1_item_flags_i2d(val, out, it, 0);
91			}
92
93			/* Encode an ASN1 item, this is use by the
94			* standard 'i2d' function. 'out' points to
95			* a buffer to output the data to.
96			*
97			* The new i2d has one additional feature. If the output
98			* buffer is NULL (i.e. *out == NULL) then a buffer is
99			* allocated and populated with the encoding.
100			*/
101
102			static int
103			asn1_item_flags_i2d(ASN1_VALUE val, unsigned char out, const ASN1_ITEM it,
104			int flags)
105			{
106	✓✓✓✓	18996	if (out && !*out) {
107		6800	unsigned char p, buf;
108			int len;
109		6800	len = ASN1_item_ex_i2d(&val, NULL, it, -1, flags);
110	✗✓	6800	if (len <= 0)
111			return len;
112		6800	buf = malloc(len);
113	✗✓	6800	if (!buf)
114			return -1;
115		6800	p = buf;
116		6800	ASN1_item_ex_i2d(&val, &p, it, -1, flags);
117		6800	*out = buf;
118		6800	return len;
119		6800	}
120
121		3448	return ASN1_item_ex_i2d(&val, out, it, -1, flags);
122		10248	}
123
124			/* Encode an item, taking care of IMPLICIT tagging (if any).
125			* This function performs the normal item handling: it can be
126			* used in external types.
127			*/
128
129			int
130			ASN1_item_ex_i2d(ASN1_VALUE pval, unsigned char out, const ASN1_ITEM *it,
131			int tag, int aclass)
132			{
133			const ASN1_TEMPLATE *tt = NULL;
134		3013906	int i, seqcontlen, seqlen, ndef = 1;
135			const ASN1_EXTERN_FUNCS *ef;
136		1506953	const ASN1_AUX *aux = it->funcs;
137			ASN1_aux_cb *asn1_cb = NULL;
138
139	✓✓✓✓	2288067	if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
140		114	return 0;
141
142	✓✓✓✓	1555163	if (aux && aux->asn1_cb)
143		34490	asn1_cb = aux->asn1_cb;
144
145	✓✓✓✓ ✓✓✗	1507050	switch (it->itype) {
146
147			case ASN1_ITYPE_PRIMITIVE:
148	✓✓	725839	if (it->templates)
149		208059	return asn1_template_ex_i2d(pval, out, it->templates,
150			tag, aclass);
151		517780	return asn1_i2d_ex_primitive(pval, out, it, tag, aclass);
152			break;
153
154			case ASN1_ITYPE_MSTRING:
155		416200	return asn1_i2d_ex_primitive(pval, out, it, -1, aclass);
156
157			case ASN1_ITYPE_CHOICE:
158	✓✓✗✓	2958	if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
159			return 0;
160		2950	i = asn1_get_choice_selector(pval, it);
161	✓✗✓✗	5900	if ((i >= 0) && (i < it->tcount)) {
162			ASN1_VALUE **pchval;
163			const ASN1_TEMPLATE *chtt;
164		2950	chtt = it->templates + i;
165		2950	pchval = asn1_get_field_ptr(pval, chtt);
166		2950	return asn1_template_ex_i2d(pchval, out, chtt,
167			-1, aclass);
168			}
169			/* Fixme: error condition if selector out of range */
170			if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
171			return 0;
172			break;
173
174			case ASN1_ITYPE_EXTERN:
175			/* If new style i2d it does all the work */
176		968	ef = it->funcs;
177		968	return ef->asn1_ex_i2d(pval, out, it, tag, aclass);
178
179			case ASN1_ITYPE_NDEF_SEQUENCE:
180			/* Use indefinite length constructed if requested */
181	✗✓	211	if (aclass & ASN1_TFLG_NDEF)
182			ndef = 2;
183			/* fall through */
184
185			case ASN1_ITYPE_SEQUENCE:
186		360882	i = asn1_enc_restore(&seqcontlen, out, pval, it);
187			/* An error occurred */
188	✗✓	360882	if (i < 0)
189			return 0;
190			/* We have a valid cached encoding... */
191	✓✓	360882	if (i > 0)
192		12786	return seqcontlen;
193			/* Otherwise carry on */
194		348096	seqcontlen = 0;
195			/* If no IMPLICIT tagging set to SEQUENCE, UNIVERSAL */
196	✓✓	348096	if (tag == -1) {
197			tag = V_ASN1_SEQUENCE;
198			/* Retain any other flags in aclass */
199		348032	aclass = (aclass & ~ASN1_TFLG_TAG_CLASS) \|
200			V_ASN1_UNIVERSAL;
201		348032	}
202	✓✓✗✓	357118	if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL))
203			return 0;
204			/* First work out sequence content length */
205	✓✓	2140706	for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
206			const ASN1_TEMPLATE *seqtt;
207			ASN1_VALUE **pseqval;
208		722257	seqtt = asn1_do_adb(pval, tt, 1);
209	✗✓	722257	if (!seqtt)
210			return 0;
211		722257	pseqval = asn1_get_field_ptr(pval, seqtt);
212			/* FIXME: check for errors in enhanced version */
213		722257	seqcontlen += asn1_template_ex_i2d(pseqval, NULL, seqtt,
214			-1, aclass);
215	✓✗	722257	}
216
217		348096	seqlen = ASN1_object_size(ndef, seqcontlen, tag);
218	✓✓	348096	if (!out)
219		230877	return seqlen;
220			/* Output SEQUENCE header */
221		117219	ASN1_put_object(out, ndef, seqcontlen, tag, aclass);
222	✓✓	722626	for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
223			const ASN1_TEMPLATE *seqtt;
224			ASN1_VALUE **pseqval;
225		244094	seqtt = asn1_do_adb(pval, tt, 1);
226	✗✓	244094	if (!seqtt)
227			return 0;
228		244094	pseqval = asn1_get_field_ptr(pval, seqtt);
229			/* FIXME: check for errors in enhanced version */
230		244094	asn1_template_ex_i2d(pseqval, out, seqtt, -1, aclass);
231	✓✗	244094	}
232	✗✓	117219	if (ndef == 2)
233			ASN1_put_eoc(out);
234	✓✓✗✓	121583	if (asn1_cb && !asn1_cb(ASN1_OP_I2D_POST, pval, it, NULL))
235			return 0;
236		117219	return seqlen;
237
238			default:
239			return 0;
240
241			}
242			return 0;
243		1506953	}
244
245			int
246			ASN1_template_i2d(ASN1_VALUE pval, unsigned char out,
247			const ASN1_TEMPLATE *tt)
248			{
249			return asn1_template_ex_i2d(pval, out, tt, -1, 0);
250			}
251
252			static int
253			asn1_template_ex_i2d(ASN1_VALUE pval, unsigned char out,
254			const ASN1_TEMPLATE *tt, int tag, int iclass)
255			{
256			int i, ret, flags, ttag, tclass, ndef;
257		2354720	flags = tt->flags;
258			/* Work out tag and class to use: tagging may come
259			* either from the template or the arguments, not both
260			* because this would create ambiguity. Additionally
261			* the iclass argument may contain some additional flags
262			* which should be noted and passed down to other levels.
263			*/
264	✓✓	1177360	if (flags & ASN1_TFLG_TAG_MASK) {
265			/* Error if argument and template tagging */
266	✗✓	4829	if (tag != -1)
267			/* FIXME: error code here */
268			return -1;
269			/* Get tagging from template */
270		4829	ttag = tt->tag;
271		4829	tclass = flags & ASN1_TFLG_TAG_CLASS;
272	✗✓	1177360	} else if (tag != -1) {
273			/* No template tagging, get from arguments */
274			ttag = tag;
275			tclass = iclass & ASN1_TFLG_TAG_CLASS;
276			} else {
277			ttag = -1;
278			tclass = 0;
279			}
280			/*
281			* Remove any class mask from iflag.
282			*/
283		1177360	iclass &= ~ASN1_TFLG_TAG_CLASS;
284
285			/* At this point 'ttag' contains the outer tag to use,
286			* 'tclass' is the class and iclass is any flags passed
287			* to this function.
288			*/
289
290			/* if template and arguments require ndef, use it */
291	✓✓✗✓	1177491	if ((flags & ASN1_TFLG_NDEF) && (iclass & ASN1_TFLG_NDEF))
292			ndef = 2;
293			else
294			ndef = 1;
295
296	✓✓	1177360	if (flags & ASN1_TFLG_SK_MASK) {
297			/* SET OF, SEQUENCE OF */
298		210212	STACK_OF(ASN1_VALUE) sk = (STACK_OF(ASN1_VALUE) )*pval;
299			int isset, sktag, skaclass;
300			int skcontlen, sklen;
301		210212	ASN1_VALUE *skitem;
302
303	✓✓	210212	if (!*pval)
304		872	return 0;
305
306	✓✓	209340	if (flags & ASN1_TFLG_SET_OF) {
307			isset = 1;
308			/* 2 means we reorder */
309		208670	if (flags & ASN1_TFLG_SEQUENCE_OF)
310			isset = 2;
311		208670	} else
312			isset = 0;
313
314			/* Work out inner tag value: if EXPLICIT
315			* or no tagging use underlying type.
316			*/
317	✓✓✓✓	209696	if ((ttag != -1) && !(flags & ASN1_TFLG_EXPTAG)) {
318			sktag = ttag;
319			skaclass = tclass;
320		222	} else {
321			skaclass = V_ASN1_UNIVERSAL;
322	✓✓	209118	if (isset)
323		208590	sktag = V_ASN1_SET;
324			else
325			sktag = V_ASN1_SEQUENCE;
326			}
327
328			/* Determine total length of items */
329			skcontlen = 0;
330	✓✓	838950	for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
331		210135	skitem = sk_ASN1_VALUE_value(sk, i);
332		210135	skcontlen += ASN1_item_ex_i2d(&skitem, NULL,
333		210135	tt->item, -1, iclass);
334			}
335		209340	sklen = ASN1_object_size(ndef, skcontlen, sktag);
336			/* If EXPLICIT need length of surrounding tag */
337	✓✓	209340	if (flags & ASN1_TFLG_EXPTAG)
338		134	ret = ASN1_object_size(ndef, sklen, ttag);
339			else
340			ret = sklen;
341
342	✓✓	209340	if (!out)
343		105150	return ret;
344
345			/* Now encode this lot... */
346			/* EXPLICIT tag */
347	✓✓	104190	if (flags & ASN1_TFLG_EXPTAG)
348		38	ASN1_put_object(out, ndef, sklen, ttag, tclass);
349			/* SET or SEQUENCE and IMPLICIT tag */
350		104190	ASN1_put_object(out, ndef, skcontlen, sktag, skaclass);
351			/* And the stuff itself */
352		104190	asn1_set_seq_out(sk, out, skcontlen, tt->item,
353			isset, iclass);
354	✗✓	104190	if (ndef == 2) {
355			ASN1_put_eoc(out);
356			if (flags & ASN1_TFLG_EXPTAG)
357			ASN1_put_eoc(out);
358			}
359
360		104190	return ret;
361		210212	}
362
363	✓✓	967148	if (flags & ASN1_TFLG_EXPTAG) {
364			/* EXPLICIT tagging */
365			/* Find length of tagged item */
366		2937	i = ASN1_item_ex_i2d(pval, NULL, tt->item,
367			-1, iclass);
368	✓✓	2937	if (!i)
369		490	return 0;
370			/* Find length of EXPLICIT tag */
371		2447	ret = ASN1_object_size(ndef, i, ttag);
372	✓✓	2447	if (out) {
373			/* Output tag and item */
374		794	ASN1_put_object(out, ndef, i, ttag, tclass);
375		794	ASN1_item_ex_i2d(pval, out, tt->item,
376			-1, iclass);
377	✗✓	794	if (ndef == 2)
378			ASN1_put_eoc(out);
379			}
380		2447	return ret;
381			}
382
383			/* Either normal or IMPLICIT tagging: combine class and flags */
384		1928422	return ASN1_item_ex_i2d(pval, out, tt->item,
385		964211	ttag, tclass \| iclass);
386		1177360	}
387
388			/* Temporary structure used to hold DER encoding of items for SET OF */
389
390			typedef struct {
391			unsigned char *data;
392			int length;
393			ASN1_VALUE *field;
394			} DER_ENC;
395
396			static int
397			der_cmp(const void a, const void b)
398			{
399		100	const DER_ENC d1 = a, d2 = b;
400			int cmplen, i;
401
402		50	cmplen = (d1->length < d2->length) ? d1->length : d2->length;
403		50	i = memcmp(d1->data, d2->data, cmplen);
404	✓✗	50	if (i)
405		50	return i;
406			return d1->length - d2->length;
407		50	}
408
409			/* Output the content octets of SET OF or SEQUENCE OF */
410
411			static int
412			asn1_set_seq_out(STACK_OF(ASN1_VALUE) sk, unsigned char *out, int skcontlen,
413			const ASN1_ITEM *item, int do_sort, int iclass)
414			{
415			int i;
416		208380	ASN1_VALUE *skitem;
417		104190	unsigned char tmpdat = NULL, p = NULL;
418			DER_ENC derlst = NULL, tder;
419
420	✓✓	104190	if (do_sort) {
421			/* Don't need to sort less than 2 items */
422	✓✓	103940	if (sk_ASN1_VALUE_num(sk) < 2)
423		103930	do_sort = 0;
424			else {
425		10	derlst = reallocarray(NULL, sk_ASN1_VALUE_num(sk),
426			sizeof(*derlst));
427		10	tmpdat = malloc(skcontlen);
428	✗✓	10	if (!derlst \|\| !tmpdat) {
429			free(derlst);
430			free(tmpdat);
431			return 0;
432			}
433			}
434			}
435			/* If not sorting just output each item */
436	✓✓	104190	if (!do_sort) {
437	✓✓	417276	for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
438		104458	skitem = sk_ASN1_VALUE_value(sk, i);
439		104458	ASN1_item_ex_i2d(&skitem, out, item, -1, iclass);
440			}
441		104180	return 1;
442			}
443		10	p = tmpdat;
444
445			/* Doing sort: build up a list of each member's DER encoding */
446	✓✓	100	for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
447		40	skitem = sk_ASN1_VALUE_value(sk, i);
448		40	tder->data = p;
449		40	tder->length = ASN1_item_ex_i2d(&skitem, &p, item, -1, iclass);
450		40	tder->field = skitem;
451			}
452
453			/* Now sort them */
454		10	qsort(derlst, sk_ASN1_VALUE_num(sk), sizeof(*derlst), der_cmp);
455			/* Output sorted DER encoding */
456		10	p = *out;
457	✓✓	100	for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++) {
458		40	memcpy(p, tder->data, tder->length);
459		40	p += tder->length;
460			}
461		10	*out = p;
462			/* If do_sort is 2 then reorder the STACK */
463	✓✗	10	if (do_sort == 2) {
464	✓✓	100	for (i = 0, tder = derlst; i < sk_ASN1_VALUE_num(sk); i++, tder++)
465		40	(void)sk_ASN1_VALUE_set(sk, i, tder->field);
466			}
467		10	free(derlst);
468		10	free(tmpdat);
469		10	return 1;
470		104190	}
471
472			static int
473			asn1_i2d_ex_primitive(ASN1_VALUE pval, unsigned char out,
474			const ASN1_ITEM *it, int tag, int aclass)
475			{
476			int len;
477		1867960	int utype;
478			int usetag;
479			int ndef = 0;
480
481		933980	utype = it->utype;
482
483			/* Get length of content octets and maybe find
484			* out the underlying type.
485			*/
486
487		933980	len = asn1_ex_i2c(pval, NULL, &utype, it);
488
489			/* If SEQUENCE, SET or OTHER then header is
490			* included in pseudo content octets so don't
491			* include tag+length. We need to check here
492			* because the call to asn1_ex_i2c() could change
493			* utype.
494			*/
495	✓✓	1867960	if ((utype == V_ASN1_SEQUENCE) \|\| (utype == V_ASN1_SET) \|\|
496		933980	(utype == V_ASN1_OTHER))
497		430	usetag = 0;
498			else
499			usetag = 1;
500
501			/* -1 means omit type */
502	✓✓	933980	if (len == -1)
503		4562	return 0;
504
505			/* -2 return is special meaning use ndef */
506	✗✓	929418	if (len == -2) {
507			ndef = 2;
508			len = 0;
509			}
510
511			/* If not implicitly tagged get tag from underlying type */
512	✓✓	929418	if (tag == -1)
513		929106	tag = utype;
514
515			/* Output tag+length followed by content octets */
516	✓✓	929418	if (out) {
517	✓✓	233153	if (usetag)
518		233071	ASN1_put_object(out, ndef, len, tag, aclass);
519		233153	asn1_ex_i2c(pval, *out, &utype, it);
520	✗✓	233153	if (ndef)
521			ASN1_put_eoc(out);
522			else
523		233153	*out += len;
524			}
525
526	✓✓	929418	if (usetag)
527		928988	return ASN1_object_size(ndef, len, tag);
528		430	return len;
529		933980	}
530
531			/* Produce content octets from a structure */
532
533			static int
534			asn1_ex_i2c(ASN1_VALUE *pval, unsigned char cout, int *putype,
535			const ASN1_ITEM *it)
536			{
537			ASN1_BOOLEAN *tbool = NULL;
538			ASN1_STRING *strtmp;
539			ASN1_OBJECT *otmp;
540			int utype;
541			const unsigned char *cont;
542		1167133	unsigned char c;
543			int len;
544			const ASN1_PRIMITIVE_FUNCS *pf;
545
546		1167133	pf = it->funcs;
547	✓✓✓✗	1199933	if (pf && pf->prim_i2c)
548		32800	return pf->prim_i2c(pval, cout, putype, it);
549
550			/* Should type be omitted? */
551	✓✓✓✓	1748428	if ((it->itype != ASN1_ITYPE_PRIMITIVE) \|\|
552		614095	(it->utype != V_ASN1_BOOLEAN)) {
553	✓✓	1133969	if (!*pval)
554		2788	return -1;
555			}
556
557	✓✓	1131545	if (it->itype == ASN1_ITYPE_MSTRING) {
558			/* If MSTRING type set the underlying type */
559		520238	strtmp = (ASN1_STRING )pval;
560		520238	utype = strtmp->type;
561		520238	*putype = utype;
562	✓✓	1131545	} else if (it->utype == V_ASN1_ANY) {
563			/* If ANY set type and pointer to value */
564			ASN1_TYPE *typ;
565		21686	typ = (ASN1_TYPE )pval;
566		21686	utype = typ->type;
567		21686	*putype = utype;
568		21686	pval = &typ->value.asn1_value;
569		21686	} else
570		589621	utype = *putype;
571
572	✓✓✓✓ ✗✓✓	1131545	switch (utype) {
573			case V_ASN1_OBJECT:
574		547405	otmp = (ASN1_OBJECT )pval;
575		547405	cont = otmp->data;
576		547405	len = otmp->length;
577		547405	break;
578
579			case V_ASN1_NULL:
580			cont = NULL;
581			len = 0;
582		19738	break;
583
584			case V_ASN1_BOOLEAN:
585		364	tbool = (ASN1_BOOLEAN *)pval;
586	✓✓	364	if (*tbool == -1)
587		244	return -1;
588	✓✗	120	if (it->utype != V_ASN1_ANY) {
589			/* Default handling if value == size field then omit */
590	✓✓✗✓	216	if (*tbool && (it->size > 0))
591			return -1;
592	✓✓✓✗	144	if (!*tbool && !it->size)
593		24	return -1;
594			}
595		96	c = (unsigned char)*tbool;
596			cont = &c;
597			len = 1;
598		96	break;
599
600			case V_ASN1_BIT_STRING:
601		35040	return i2c_ASN1_BIT_STRING((ASN1_BIT_STRING )pval,
602		17520	cout ? &cout : NULL);
603			break;
604
605			case V_ASN1_INTEGER:
606			case V_ASN1_ENUMERATED:
607			/* These are all have the same content format
608			* as ASN1_INTEGER
609			*/
610		21382	return i2c_ASN1_INTEGER((ASN1_INTEGER )pval,
611		10691	cout ? &cout : NULL);
612			break;
613
614			case V_ASN1_OCTET_STRING:
615			case V_ASN1_NUMERICSTRING:
616			case V_ASN1_PRINTABLESTRING:
617			case V_ASN1_T61STRING:
618			case V_ASN1_VIDEOTEXSTRING:
619			case V_ASN1_IA5STRING:
620			case V_ASN1_UTCTIME:
621			case V_ASN1_GENERALIZEDTIME:
622			case V_ASN1_GRAPHICSTRING:
623			case V_ASN1_VISIBLESTRING:
624			case V_ASN1_GENERALSTRING:
625			case V_ASN1_UNIVERSALSTRING:
626			case V_ASN1_BMPSTRING:
627			case V_ASN1_UTF8STRING:
628			case V_ASN1_SEQUENCE:
629			case V_ASN1_SET:
630			default:
631			/* All based on ASN1_STRING and handled the same */
632		535827	strtmp = (ASN1_STRING )pval;
633			/* Special handling for NDEF */
634	✓✓✗✓	535912	if ((it->size == ASN1_TFLG_NDEF) &&
635		85	(strtmp->flags & ASN1_STRING_FLAG_NDEF)) {
636			if (cout) {
637			strtmp->data = cout;
638			strtmp->length = 0;
639			}
640			/* Special return code */
641			return -2;
642			}
643		535827	cont = strtmp->data;
644		535827	len = strtmp->length;
645
646		535827	break;
647
648			}
649	✓✓	1103066	if (cout && len)
650		215912	memcpy(cout, cont, len);
651		1103066	return len;
652		1167133	}