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

Source
/*
 * 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: 2025-12-10 06:24

Line	Count	Source
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		int ossl_asn1_item_ex_new_intern(ASN1_VALUE *pval, const ASN1_ITEM it,
49		OSSL_LIB_CTX libctx, const char propq)
50	0	{
51	0	return asn1_item_embed_new(pval, it, 0, libctx, propq);
52	0	}
53
54		int ASN1_item_ex_new(ASN1_VALUE *pval, const ASN1_ITEM it)
55	0	{
56	0	return asn1_item_embed_new(pval, it, 0, NULL, NULL);
57	0	}
58
59		int asn1_item_embed_new(ASN1_VALUE *pval, const ASN1_ITEM it, int embed,
60		OSSL_LIB_CTX libctx, const char propq)
61	0	{
62	0	const ASN1_TEMPLATE *tt = NULL;
63	0	const ASN1_EXTERN_FUNCS *ef;
64	0	const ASN1_AUX *aux = it->funcs;
65	0	ASN1_aux_cb *asn1_cb;
66	0	ASN1_VALUE **pseqval;
67	0	int i;
68	0	if (aux && aux->asn1_cb)
69	0	asn1_cb = aux->asn1_cb;
70	0	else
71	0	asn1_cb = 0;
72
73	0	switch (it->itype) {
74
75	0	case ASN1_ITYPE_EXTERN:
76	0	ef = it->funcs;
77	0	if (ef != NULL) {
78	0	if (ef->asn1_ex_new_ex != NULL) {
79	0	if (!ef->asn1_ex_new_ex(pval, it, libctx, propq))
80	0	goto asn1err;
81	0	} else if (ef->asn1_ex_new != NULL) {
82	0	if (!ef->asn1_ex_new(pval, it))
83	0	goto asn1err;
84	0	}
85	0	}
86	0	break;
87
88	0	case ASN1_ITYPE_PRIMITIVE:
89	0	if (it->templates) {
90	0	if (!asn1_template_new(pval, it->templates, libctx, propq))
91	0	goto asn1err;
92	0	} else if (!asn1_primitive_new(pval, it, embed))
93	0	goto asn1err;
94	0	break;
95
96	0	case ASN1_ITYPE_MSTRING:
97	0	if (!asn1_primitive_new(pval, it, embed))
98	0	goto asn1err;
99	0	break;
100
101	0	case ASN1_ITYPE_CHOICE:
102	0	if (asn1_cb) {
103	0	i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
104	0	if (!i)
105	0	goto auxerr;
106	0	if (i == 2) {
107	0	return 1;
108	0	}
109	0	}
110	0	if (embed) {
111	0	memset(*pval, 0, it->size);
112	0	} else {
113	0	*pval = OPENSSL_zalloc(it->size);
114	0	if (*pval == NULL)
115	0	return 0;
116	0	}
117	0	ossl_asn1_set_choice_selector(pval, -1, it);
118	0	if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
119	0	goto auxerr2;
120	0	break;
121
122	0	case ASN1_ITYPE_NDEF_SEQUENCE:
123	0	case ASN1_ITYPE_SEQUENCE:
124	0	if (asn1_cb) {
125	0	i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
126	0	if (!i)
127	0	goto auxerr;
128	0	if (i == 2) {
129	0	return 1;
130	0	}
131	0	}
132	0	if (embed) {
133	0	memset(*pval, 0, it->size);
134	0	} else {
135	0	*pval = OPENSSL_zalloc(it->size);
136	0	if (*pval == NULL)
137	0	return 0;
138	0	}
139		/* 0 : init. lock */
140	0	if (ossl_asn1_do_lock(pval, 0, it) < 0) {
141	0	if (!embed) {
142	0	OPENSSL_free(*pval);
143	0	*pval = NULL;
144	0	}
145	0	goto asn1err;
146	0	}
147	0	ossl_asn1_enc_init(pval, it);
148	0	for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
149	0	pseqval = ossl_asn1_get_field_ptr(pval, tt);
150	0	if (!asn1_template_new(pseqval, tt, libctx, propq))
151	0	goto asn1err2;
152	0	}
153	0	if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
154	0	goto auxerr2;
155	0	break;
156	0	}
157	0	return 1;
158
159	0	asn1err2:
160	0	ossl_asn1_item_embed_free(pval, it, embed);
161	0	asn1err:
162	0	ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
163	0	return 0;
164
165	0	auxerr2:
166	0	ossl_asn1_item_embed_free(pval, it, embed);
167	0	auxerr:
168	0	ERR_raise(ERR_LIB_ASN1, ASN1_R_AUX_ERROR);
169	0	return 0;
170	0	}
171
172		static void asn1_item_clear(ASN1_VALUE *pval, const ASN1_ITEM it)
173	0	{
174	0	const ASN1_EXTERN_FUNCS *ef;
175
176	0	switch (it->itype) {
177
178	0	case ASN1_ITYPE_EXTERN:
179	0	ef = it->funcs;
180	0	if (ef && ef->asn1_ex_clear)
181	0	ef->asn1_ex_clear(pval, it);
182	0	else
183	0	*pval = NULL;
184	0	break;
185
186	0	case ASN1_ITYPE_PRIMITIVE:
187	0	if (it->templates)
188	0	asn1_template_clear(pval, it->templates);
189	0	else
190	0	asn1_primitive_clear(pval, it);
191	0	break;
192
193	0	case ASN1_ITYPE_MSTRING:
194	0	asn1_primitive_clear(pval, it);
195	0	break;
196
197	0	case ASN1_ITYPE_CHOICE:
198	0	case ASN1_ITYPE_SEQUENCE:
199	0	case ASN1_ITYPE_NDEF_SEQUENCE:
200	0	*pval = NULL;
201	0	break;
202	0	}
203	0	}
204
205		static int asn1_template_new(ASN1_VALUE *pval, const ASN1_TEMPLATE tt,
206		OSSL_LIB_CTX libctx, const char propq)
207	0	{
208	0	const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
209	0	int embed = tt->flags & ASN1_TFLG_EMBED;
210	0	ASN1_VALUE *tval;
211	0	int ret;
212	0	if (embed) {
213	0	tval = (ASN1_VALUE *)pval;
214	0	pval = &tval;
215	0	}
216	0	if (tt->flags & ASN1_TFLG_OPTIONAL) {
217	0	asn1_template_clear(pval, tt);
218	0	return 1;
219	0	}
220		/* If ANY DEFINED BY nothing to do */
221
222	0	if (tt->flags & ASN1_TFLG_ADB_MASK) {
223	0	*pval = NULL;
224	0	return 1;
225	0	}
226		/* If SET OF or SEQUENCE OF, its a STACK */
227	0	if (tt->flags & ASN1_TFLG_SK_MASK) {
228	0	STACK_OF(ASN1_VALUE) *skval;
229	0	skval = sk_ASN1_VALUE_new_null();
230	0	if (!skval) {
231	0	ERR_raise(ERR_LIB_ASN1, ERR_R_CRYPTO_LIB);
232	0	ret = 0;
233	0	goto done;
234	0	}
235	0	pval = (ASN1_VALUE )skval;
236	0	ret = 1;
237	0	goto done;
238	0	}
239		/* Otherwise pass it back to the item routine */
240	0	ret = asn1_item_embed_new(pval, it, embed, libctx, propq);
241	0	done:
242	0	return ret;
243	0	}
244
245		static void asn1_template_clear(ASN1_VALUE *pval, const ASN1_TEMPLATE tt)
246	0	{
247		/* If ADB or STACK just NULL the field */
248	0	if (tt->flags & (ASN1_TFLG_ADB_MASK \| ASN1_TFLG_SK_MASK))
249	0	*pval = NULL;
250	0	else
251	0	asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
252	0	}
253
254		/*
255		* NB: could probably combine most of the real XXX_new() behaviour and junk
256		* all the old functions.
257		*/
258
259		static int asn1_primitive_new(ASN1_VALUE *pval, const ASN1_ITEM it,
260		int embed)
261	0	{
262	0	ASN1_TYPE *typ;
263	0	ASN1_STRING *str;
264	0	int utype;
265
266	0	if (!it)
267	0	return 0;
268
269	0	if (it->funcs) {
270	0	const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
271	0	if (embed) {
272	0	if (pf->prim_clear) {
273	0	pf->prim_clear(pval, it);
274	0	return 1;
275	0	}
276	0	} else if (pf->prim_new) {
277	0	return pf->prim_new(pval, it);
278	0	}
279	0	}
280
281	0	if (it->itype == ASN1_ITYPE_MSTRING)
282	0	utype = -1;
283	0	else
284	0	utype = it->utype;
285	0	switch (utype) {
286	0	case V_ASN1_OBJECT:
287	0	pval = (ASN1_VALUE )OBJ_nid2obj(NID_undef);
288	0	return 1;
289
290	0	case V_ASN1_BOOLEAN:
291	0	(ASN1_BOOLEAN )pval = it->size;
292	0	return 1;
293
294	0	case V_ASN1_NULL:
295	0	pval = (ASN1_VALUE )1;
296	0	return 1;
297
298	0	case V_ASN1_ANY:
299	0	if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL)
300	0	return 0;
301	0	typ->value.ptr = NULL;
302	0	typ->type = -1;
303	0	pval = (ASN1_VALUE )typ;
304	0	break;
305
306	0	default:
307	0	if (embed) {
308	0	str = (ASN1_STRING *)pval;
309	0	memset(str, 0, sizeof(*str));
310	0	str->type = utype;
311	0	str->flags = ASN1_STRING_FLAG_EMBED;
312	0	} else {
313	0	str = ASN1_STRING_type_new(utype);
314	0	pval = (ASN1_VALUE )str;
315	0	}
316	0	if (it->itype == ASN1_ITYPE_MSTRING && str)
317	0	str->flags \|= ASN1_STRING_FLAG_MSTRING;
318	0	break;
319	0	}
320	0	if (*pval)
321	0	return 1;
322	0	return 0;
323	0	}
324
325		static void asn1_primitive_clear(ASN1_VALUE *pval, const ASN1_ITEM it)
326	0	{
327	0	int utype;
328	0	if (it && it->funcs) {
329	0	const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
330	0	if (pf->prim_clear)
331	0	pf->prim_clear(pval, it);
332	0	else
333	0	*pval = NULL;
334	0	return;
335	0	}
336	0	if (!it \|\| (it->itype == ASN1_ITYPE_MSTRING))
337	0	utype = -1;
338	0	else
339	0	utype = it->utype;
340	0	if (utype == V_ASN1_BOOLEAN)
341	0	(ASN1_BOOLEAN )pval = it->size;
342	0	else
343	0	*pval = NULL;
344	0	}