/src/openssl/crypto/asn1/tasn_new.c

Source (jump to first uncovered line)
/*
 * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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 <stddef.h>
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/err.h>
#include <openssl/asn1t.h>
#include <string.h>
#include "asn1_local.h"

static int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
                               int embed, OSSL_LIB_CTX *libctx,
                               const char *propq);
static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
                              int embed);
static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
                             OSSL_LIB_CTX *libctx, const char *propq);
static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);

ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
{
    ASN1_VALUE *ret = NULL;
    if (ASN1_item_ex_new(&ret, it) > 0)
        return ret;
    return NULL;
}

ASN1_VALUE *ASN1_item_new_ex(const ASN1_ITEM *it, OSSL_LIB_CTX *libctx,
                             const char *propq)
{
    ASN1_VALUE *ret = NULL;
    if (asn1_item_embed_new(&ret, it, 0, libctx, propq) > 0)
        return ret;
    return NULL;
}

/* Allocate an ASN1 structure */


int ossl_asn1_item_ex_new_intern(ASN1_VALUE **pval, const ASN1_ITEM *it,
                                 OSSL_LIB_CTX *libctx, const char *propq)
{
    return asn1_item_embed_new(pval, it, 0, libctx, propq);
}

int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    return asn1_item_embed_new(pval, it, 0, NULL, NULL);
}

int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed,
                        OSSL_LIB_CTX *libctx, const char *propq)
{
    const ASN1_TEMPLATE *tt = NULL;
    const ASN1_EXTERN_FUNCS *ef;
    const ASN1_AUX *aux = it->funcs;
    ASN1_aux_cb *asn1_cb;
    ASN1_VALUE **pseqval;
    int i;
    if (aux && aux->asn1_cb)
        asn1_cb = aux->asn1_cb;
    else
        asn1_cb = 0;

    switch (it->itype) {

    case ASN1_ITYPE_EXTERN:
        ef = it->funcs;
        if (ef != NULL) {
            if (ef->asn1_ex_new_ex != NULL) {
                if (!ef->asn1_ex_new_ex(pval, it, libctx, propq))
                    goto asn1err;
            } else if (ef->asn1_ex_new != NULL) {
                if (!ef->asn1_ex_new(pval, it))
                    goto asn1err;
            }
        }
        break;

    case ASN1_ITYPE_PRIMITIVE:
        if (it->templates) {
            if (!asn1_template_new(pval, it->templates, libctx, propq))
                goto asn1err;
        } else if (!asn1_primitive_new(pval, it, embed))
            goto asn1err;
        break;

    case ASN1_ITYPE_MSTRING:
        if (!asn1_primitive_new(pval, it, embed))
            goto asn1err;
        break;

    case ASN1_ITYPE_CHOICE:
        if (asn1_cb) {
            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
            if (!i)
                goto auxerr;
            if (i == 2) {
                return 1;
            }
        }
        if (embed) {
            memset(*pval, 0, it->size);
        } else {
            *pval = OPENSSL_zalloc(it->size);
            if (*pval == NULL)
                return 0;
        }
        ossl_asn1_set_choice_selector(pval, -1, it);
        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
            goto auxerr2;
        break;

    case ASN1_ITYPE_NDEF_SEQUENCE:
    case ASN1_ITYPE_SEQUENCE:
        if (asn1_cb) {
            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
            if (!i)
                goto auxerr;
            if (i == 2) {
                return 1;
            }
        }
        if (embed) {
            memset(*pval, 0, it->size);
        } else {
            *pval = OPENSSL_zalloc(it->size);
            if (*pval == NULL)
                return 0;
        }
        /* 0 : init. lock */
        if (ossl_asn1_do_lock(pval, 0, it) < 0) {
            if (!embed) {
                OPENSSL_free(*pval);
                *pval = NULL;
            }
            goto asn1err;
        }
        ossl_asn1_enc_init(pval, it);
        for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
            pseqval = ossl_asn1_get_field_ptr(pval, tt);
            if (!asn1_template_new(pseqval, tt, libctx, propq))
                goto asn1err2;
        }
        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
            goto auxerr2;
        break;
    }
    return 1;

 asn1err2:
    ossl_asn1_item_embed_free(pval, it, embed);
 asn1err:
    ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
    return 0;

 auxerr2:
    ossl_asn1_item_embed_free(pval, it, embed);
 auxerr:
    ERR_raise(ERR_LIB_ASN1, ASN1_R_AUX_ERROR);
    return 0;

}

static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    const ASN1_EXTERN_FUNCS *ef;

    switch (it->itype) {

    case ASN1_ITYPE_EXTERN:
        ef = it->funcs;
        if (ef && ef->asn1_ex_clear)
            ef->asn1_ex_clear(pval, it);
        else
            *pval = NULL;
        break;

    case ASN1_ITYPE_PRIMITIVE:
        if (it->templates)
            asn1_template_clear(pval, it->templates);
        else
            asn1_primitive_clear(pval, it);
        break;

    case ASN1_ITYPE_MSTRING:
        asn1_primitive_clear(pval, it);
        break;

    case ASN1_ITYPE_CHOICE:
    case ASN1_ITYPE_SEQUENCE:
    case ASN1_ITYPE_NDEF_SEQUENCE:
        *pval = NULL;
        break;
    }
}

static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
                             OSSL_LIB_CTX *libctx, const char *propq)
{
    const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
    int embed = tt->flags & ASN1_TFLG_EMBED;
    ASN1_VALUE *tval;
    int ret;
    if (embed) {
        tval = (ASN1_VALUE *)pval;
        pval = &tval;
    }
    if (tt->flags & ASN1_TFLG_OPTIONAL) {
        asn1_template_clear(pval, tt);
        return 1;
    }
    /* If ANY DEFINED BY nothing to do */

    if (tt->flags & ASN1_TFLG_ADB_MASK) {
        *pval = NULL;
        return 1;
    }
    /* If SET OF or SEQUENCE OF, its a STACK */
    if (tt->flags & ASN1_TFLG_SK_MASK) {
        STACK_OF(ASN1_VALUE) *skval;
        skval = sk_ASN1_VALUE_new_null();
        if (!skval) {
            ERR_raise(ERR_LIB_ASN1, ERR_R_CRYPTO_LIB);
            ret = 0;
            goto done;
        }
        *pval = (ASN1_VALUE *)skval;
        ret = 1;
        goto done;
    }
    /* Otherwise pass it back to the item routine */
    ret = asn1_item_embed_new(pval, it, embed, libctx, propq);
 done:
    return ret;
}

static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
{
    /* If ADB or STACK just NULL the field */
    if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
        *pval = NULL;
    else
        asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
}

/*
 * NB: could probably combine most of the real XXX_new() behaviour and junk
 * all the old functions.
 */

static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
                              int embed)
{
    ASN1_TYPE *typ;
    ASN1_STRING *str;
    int utype;

    if (!it)
        return 0;

    if (it->funcs) {
        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
        if (embed) {
            if (pf->prim_clear) {
                pf->prim_clear(pval, it);
                return 1;
            }
        } else if (pf->prim_new) {
            return pf->prim_new(pval, it);
        }
    }

    if (it->itype == ASN1_ITYPE_MSTRING)
        utype = -1;
    else
        utype = it->utype;
    switch (utype) {
    case V_ASN1_OBJECT:
        *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
        return 1;

    case V_ASN1_BOOLEAN:
        *(ASN1_BOOLEAN *)pval = it->size;
        return 1;

    case V_ASN1_NULL:
        *pval = (ASN1_VALUE *)1;
        return 1;

    case V_ASN1_ANY:
        if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL)
            return 0;
        typ->value.ptr = NULL;
        typ->type = -1;
        *pval = (ASN1_VALUE *)typ;
        break;

    default:
        if (embed) {
            str = *(ASN1_STRING **)pval;
            memset(str, 0, sizeof(*str));
            str->type = utype;
            str->flags = ASN1_STRING_FLAG_EMBED;
        } else {
            str = ASN1_STRING_type_new(utype);
            *pval = (ASN1_VALUE *)str;
        }
        if (it->itype == ASN1_ITYPE_MSTRING && str)
            str->flags |= ASN1_STRING_FLAG_MSTRING;
        break;
    }
    if (*pval)
        return 1;
    return 0;
}

static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
    int utype;
    if (it && it->funcs) {
        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
        if (pf->prim_clear)
            pf->prim_clear(pval, it);
        else
            *pval = NULL;
        return;
    }
    if (!it || (it->itype == ASN1_ITYPE_MSTRING))
        utype = -1;
    else
        utype = it->utype;
    if (utype == V_ASN1_BOOLEAN)
        *(ASN1_BOOLEAN *)pval = it->size;
    else
        *pval = NULL;
}

Coverage Report

Created: 2025-06-22 06:56

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include <stddef.h>
11		#include <openssl/asn1.h>
12		#include <openssl/objects.h>
13		#include <openssl/err.h>
14		#include <openssl/asn1t.h>
15		#include <string.h>
16		#include "asn1_local.h"
17
18		static int asn1_item_embed_new(ASN1_VALUE *pval, const ASN1_ITEM it,
19		int embed, OSSL_LIB_CTX *libctx,
20		const char *propq);
21		static int asn1_primitive_new(ASN1_VALUE *pval, const ASN1_ITEM it,
22		int embed);
23		static void asn1_item_clear(ASN1_VALUE *pval, const ASN1_ITEM it);
24		static int asn1_template_new(ASN1_VALUE *pval, const ASN1_TEMPLATE tt,
25		OSSL_LIB_CTX libctx, const char propq);
26		static void asn1_template_clear(ASN1_VALUE *pval, const ASN1_TEMPLATE tt);
27		static void asn1_primitive_clear(ASN1_VALUE *pval, const ASN1_ITEM it);
28
29		ASN1_VALUE ASN1_item_new(const ASN1_ITEM it)
30	0	{
31	0	ASN1_VALUE *ret = NULL;
32	0	if (ASN1_item_ex_new(&ret, it) > 0)
33	0	return ret;
34	0	return NULL;
35	0	}
36
37		ASN1_VALUE ASN1_item_new_ex(const ASN1_ITEM it, OSSL_LIB_CTX *libctx,
38		const char *propq)
39	0	{
40	0	ASN1_VALUE *ret = NULL;
41	0	if (asn1_item_embed_new(&ret, it, 0, libctx, propq) > 0)
42	0	return ret;
43	0	return NULL;
44	0	}
45
46		/* Allocate an ASN1 structure */
47
48
49		int ossl_asn1_item_ex_new_intern(ASN1_VALUE *pval, const ASN1_ITEM it,
50		OSSL_LIB_CTX libctx, const char propq)
51	0	{
52	0	return asn1_item_embed_new(pval, it, 0, libctx, propq);
53	0	}
54
55		int ASN1_item_ex_new(ASN1_VALUE *pval, const ASN1_ITEM it)
56	0	{
57	0	return asn1_item_embed_new(pval, it, 0, NULL, NULL);
58	0	}
59
60		int asn1_item_embed_new(ASN1_VALUE *pval, const ASN1_ITEM it, int embed,
61		OSSL_LIB_CTX libctx, const char propq)
62	0	{
63	0	const ASN1_TEMPLATE *tt = NULL;
64	0	const ASN1_EXTERN_FUNCS *ef;
65	0	const ASN1_AUX *aux = it->funcs;
66	0	ASN1_aux_cb *asn1_cb;
67	0	ASN1_VALUE **pseqval;
68	0	int i;
69	0	if (aux && aux->asn1_cb)
70	0	asn1_cb = aux->asn1_cb;
71	0	else
72	0	asn1_cb = 0;
73
74	0	switch (it->itype) {
75
76	0	case ASN1_ITYPE_EXTERN:
77	0	ef = it->funcs;
78	0	if (ef != NULL) {
79	0	if (ef->asn1_ex_new_ex != NULL) {
80	0	if (!ef->asn1_ex_new_ex(pval, it, libctx, propq))
81	0	goto asn1err;
82	0	} else if (ef->asn1_ex_new != NULL) {
83	0	if (!ef->asn1_ex_new(pval, it))
84	0	goto asn1err;
85	0	}
86	0	}
87	0	break;
88
89	0	case ASN1_ITYPE_PRIMITIVE:
90	0	if (it->templates) {
91	0	if (!asn1_template_new(pval, it->templates, libctx, propq))
92	0	goto asn1err;
93	0	} else if (!asn1_primitive_new(pval, it, embed))
94	0	goto asn1err;
95	0	break;
96
97	0	case ASN1_ITYPE_MSTRING:
98	0	if (!asn1_primitive_new(pval, it, embed))
99	0	goto asn1err;
100	0	break;
101
102	0	case ASN1_ITYPE_CHOICE:
103	0	if (asn1_cb) {
104	0	i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
105	0	if (!i)
106	0	goto auxerr;
107	0	if (i == 2) {
108	0	return 1;
109	0	}
110	0	}
111	0	if (embed) {
112	0	memset(*pval, 0, it->size);
113	0	} else {
114	0	*pval = OPENSSL_zalloc(it->size);
115	0	if (*pval == NULL)
116	0	return 0;
117	0	}
118	0	ossl_asn1_set_choice_selector(pval, -1, it);
119	0	if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
120	0	goto auxerr2;
121	0	break;
122
123	0	case ASN1_ITYPE_NDEF_SEQUENCE:
124	0	case ASN1_ITYPE_SEQUENCE:
125	0	if (asn1_cb) {
126	0	i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
127	0	if (!i)
128	0	goto auxerr;
129	0	if (i == 2) {
130	0	return 1;
131	0	}
132	0	}
133	0	if (embed) {
134	0	memset(*pval, 0, it->size);
135	0	} else {
136	0	*pval = OPENSSL_zalloc(it->size);
137	0	if (*pval == NULL)
138	0	return 0;
139	0	}
140		/* 0 : init. lock */
141	0	if (ossl_asn1_do_lock(pval, 0, it) < 0) {
142	0	if (!embed) {
143	0	OPENSSL_free(*pval);
144	0	*pval = NULL;
145	0	}
146	0	goto asn1err;
147	0	}
148	0	ossl_asn1_enc_init(pval, it);
149	0	for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
150	0	pseqval = ossl_asn1_get_field_ptr(pval, tt);
151	0	if (!asn1_template_new(pseqval, tt, libctx, propq))
152	0	goto asn1err2;
153	0	}
154	0	if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
155	0	goto auxerr2;
156	0	break;
157	0	}
158	0	return 1;
159
160	0	asn1err2:
161	0	ossl_asn1_item_embed_free(pval, it, embed);
162	0	asn1err:
163	0	ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
164	0	return 0;
165
166	0	auxerr2:
167	0	ossl_asn1_item_embed_free(pval, it, embed);
168	0	auxerr:
169	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_AUX_ERROR);
170	0	return 0;
171
172	0	}
173
174		static void asn1_item_clear(ASN1_VALUE *pval, const ASN1_ITEM it)
175	0	{
176	0	const ASN1_EXTERN_FUNCS *ef;
177
178	0	switch (it->itype) {
179
180	0	case ASN1_ITYPE_EXTERN:
181	0	ef = it->funcs;
182	0	if (ef && ef->asn1_ex_clear)
183	0	ef->asn1_ex_clear(pval, it);
184	0	else
185	0	*pval = NULL;
186	0	break;
187
188	0	case ASN1_ITYPE_PRIMITIVE:
189	0	if (it->templates)
190	0	asn1_template_clear(pval, it->templates);
191	0	else
192	0	asn1_primitive_clear(pval, it);
193	0	break;
194
195	0	case ASN1_ITYPE_MSTRING:
196	0	asn1_primitive_clear(pval, it);
197	0	break;
198
199	0	case ASN1_ITYPE_CHOICE:
200	0	case ASN1_ITYPE_SEQUENCE:
201	0	case ASN1_ITYPE_NDEF_SEQUENCE:
202	0	*pval = NULL;
203	0	break;
204	0	}
205	0	}
206
207		static int asn1_template_new(ASN1_VALUE *pval, const ASN1_TEMPLATE tt,
208		OSSL_LIB_CTX libctx, const char propq)
209	0	{
210	0	const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
211	0	int embed = tt->flags & ASN1_TFLG_EMBED;
212	0	ASN1_VALUE *tval;
213	0	int ret;
214	0	if (embed) {
215	0	tval = (ASN1_VALUE *)pval;
216	0	pval = &tval;
217	0	}
218	0	if (tt->flags & ASN1_TFLG_OPTIONAL) {
219	0	asn1_template_clear(pval, tt);
220	0	return 1;
221	0	}
222		/* If ANY DEFINED BY nothing to do */
223
224	0	if (tt->flags & ASN1_TFLG_ADB_MASK) {
225	0	*pval = NULL;
226	0	return 1;
227	0	}
228		/* If SET OF or SEQUENCE OF, its a STACK */
229	0	if (tt->flags & ASN1_TFLG_SK_MASK) {
230	0	STACK_OF(ASN1_VALUE) *skval;
231	0	skval = sk_ASN1_VALUE_new_null();
232	0	if (!skval) {
233	0	ERR_raise(ERR_LIB_ASN1, ERR_R_CRYPTO_LIB);
234	0	ret = 0;
235	0	goto done;
236	0	}
237	0	pval = (ASN1_VALUE )skval;
238	0	ret = 1;
239	0	goto done;
240	0	}
241		/* Otherwise pass it back to the item routine */
242	0	ret = asn1_item_embed_new(pval, it, embed, libctx, propq);
243	0	done:
244	0	return ret;
245	0	}
246
247		static void asn1_template_clear(ASN1_VALUE *pval, const ASN1_TEMPLATE tt)
248	0	{
249		/* If ADB or STACK just NULL the field */
250	0	if (tt->flags & (ASN1_TFLG_ADB_MASK \| ASN1_TFLG_SK_MASK))
251	0	*pval = NULL;
252	0	else
253	0	asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
254	0	}
255
256		/*
257		* NB: could probably combine most of the real XXX_new() behaviour and junk
258		* all the old functions.
259		*/
260
261		static int asn1_primitive_new(ASN1_VALUE *pval, const ASN1_ITEM it,
262		int embed)
263	0	{
264	0	ASN1_TYPE *typ;
265	0	ASN1_STRING *str;
266	0	int utype;
267
268	0	if (!it)
269	0	return 0;
270
271	0	if (it->funcs) {
272	0	const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
273	0	if (embed) {
274	0	if (pf->prim_clear) {
275	0	pf->prim_clear(pval, it);
276	0	return 1;
277	0	}
278	0	} else if (pf->prim_new) {
279	0	return pf->prim_new(pval, it);
280	0	}
281	0	}
282
283	0	if (it->itype == ASN1_ITYPE_MSTRING)
284	0	utype = -1;
285	0	else
286	0	utype = it->utype;
287	0	switch (utype) {
288	0	case V_ASN1_OBJECT:
289	0	pval = (ASN1_VALUE )OBJ_nid2obj(NID_undef);
290	0	return 1;
291
292	0	case V_ASN1_BOOLEAN:
293	0	(ASN1_BOOLEAN )pval = it->size;
294	0	return 1;
295
296	0	case V_ASN1_NULL:
297	0	pval = (ASN1_VALUE )1;
298	0	return 1;
299
300	0	case V_ASN1_ANY:
301	0	if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL)
302	0	return 0;
303	0	typ->value.ptr = NULL;
304	0	typ->type = -1;
305	0	pval = (ASN1_VALUE )typ;
306	0	break;
307
308	0	default:
309	0	if (embed) {
310	0	str = (ASN1_STRING *)pval;
311	0	memset(str, 0, sizeof(*str));
312	0	str->type = utype;
313	0	str->flags = ASN1_STRING_FLAG_EMBED;
314	0	} else {
315	0	str = ASN1_STRING_type_new(utype);
316	0	pval = (ASN1_VALUE )str;
317	0	}
318	0	if (it->itype == ASN1_ITYPE_MSTRING && str)
319	0	str->flags \|= ASN1_STRING_FLAG_MSTRING;
320	0	break;
321	0	}
322	0	if (*pval)
323	0	return 1;
324	0	return 0;
325	0	}
326
327		static void asn1_primitive_clear(ASN1_VALUE *pval, const ASN1_ITEM it)
328	0	{
329	0	int utype;
330	0	if (it && it->funcs) {
331	0	const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
332	0	if (pf->prim_clear)
333	0	pf->prim_clear(pval, it);
334	0	else
335	0	*pval = NULL;
336	0	return;
337	0	}
338	0	if (!it \|\| (it->itype == ASN1_ITYPE_MSTRING))
339	0	utype = -1;
340	0	else
341	0	utype = it->utype;
342	0	if (utype == V_ASN1_BOOLEAN)
343	0	(ASN1_BOOLEAN )pval = it->size;
344	0	else
345	0	*pval = NULL;
346	0	}