x_name.c revision 296465 
1/* crypto/asn1/x_name.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/asn1t.h>
62#include <openssl/x509.h>
63
64static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in,
65                            long len, const ASN1_ITEM *it, int tag,
66                            int aclass, char opt, ASN1_TLC *ctx);
67
68static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
69                            const ASN1_ITEM *it, int tag, int aclass);
70static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
71static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
72
73static int x509_name_encode(X509_NAME *a);
74
75ASN1_SEQUENCE(X509_NAME_ENTRY) = {
76        ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
77        ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
78} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
79
80IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
81IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
82
83/*
84 * For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
85 * declare two template wrappers for this
86 */
87
88ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
89        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
90ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
91
92ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
93        ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
94ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
95
96/*
97 * Normally that's where it would end: we'd have two nested STACK structures
98 * representing the ASN1. Unfortunately X509_NAME uses a completely different
99 * form and caches encodings so we have to process the internal form and
100 * convert to the external form.
101 */
102
103const ASN1_EXTERN_FUNCS x509_name_ff = {
104    NULL,
105    x509_name_ex_new,
106    x509_name_ex_free,
107    0,                          /* Default clear behaviour is OK */
108    x509_name_ex_d2i,
109    x509_name_ex_i2d
110};
111
112IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
113
114IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
115
116IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
117
118static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
119{
120    X509_NAME *ret = NULL;
121    ret = OPENSSL_malloc(sizeof(X509_NAME));
122    if (!ret)
123        goto memerr;
124    if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
125        goto memerr;
126    if ((ret->bytes = BUF_MEM_new()) == NULL)
127        goto memerr;
128    ret->modified = 1;
129    *val = (ASN1_VALUE *)ret;
130    return 1;
131
132 memerr:
133    ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
134    if (ret) {
135        if (ret->entries)
136            sk_X509_NAME_ENTRY_free(ret->entries);
137        OPENSSL_free(ret);
138    }
139    return 0;
140}
141
142static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
143{
144    X509_NAME *a;
145    if (!pval || !*pval)
146        return;
147    a = (X509_NAME *)*pval;
148
149    BUF_MEM_free(a->bytes);
150    sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
151    OPENSSL_free(a);
152    *pval = NULL;
153}
154
155/*
156 * Used with sk_pop_free() to free up the internal representation. NB: we
157 * only free the STACK and not its contents because it is already present in
158 * the X509_NAME structure.
159 */
160
161static void sk_internal_free(void *a)
162{
163    sk_free(a);
164}
165
166static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in,
167                            long len, const ASN1_ITEM *it, int tag,
168                            int aclass, char opt, ASN1_TLC *ctx)
169{
170    const unsigned char *p = *in, *q;
171    union {
172        STACK *s;
173        ASN1_VALUE *a;
174    } intname = {
175        NULL
176    };
177    union {
178        X509_NAME *x;
179        ASN1_VALUE *a;
180    } nm = {
181        NULL
182    };
183    int i, j, ret;
184    STACK_OF(X509_NAME_ENTRY) *entries;
185    X509_NAME_ENTRY *entry;
186    q = p;
187
188    /* Get internal representation of Name */
189    ret = ASN1_item_ex_d2i(&intname.a,
190                           &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
191                           tag, aclass, opt, ctx);
192
193    if (ret <= 0)
194        return ret;
195
196    if (*val)
197        x509_name_ex_free(val, NULL);
198    if (!x509_name_ex_new(&nm.a, NULL))
199        goto err;
200    /* We've decoded it: now cache encoding */
201    if (!BUF_MEM_grow(nm.x->bytes, p - q))
202        goto err;
203    memcpy(nm.x->bytes->data, q, p - q);
204
205    /* Convert internal representation to X509_NAME structure */
206    for (i = 0; i < sk_num(intname.s); i++) {
207        entries = (STACK_OF(X509_NAME_ENTRY) *)sk_value(intname.s, i);
208        for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
209            entry = sk_X509_NAME_ENTRY_value(entries, j);
210            entry->set = i;
211            if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
212                goto err;
213        }
214        sk_X509_NAME_ENTRY_free(entries);
215    }
216    sk_free(intname.s);
217    nm.x->modified = 0;
218    *val = nm.a;
219    *in = p;
220    return ret;
221 err:
222    if (nm.x != NULL)
223        X509_NAME_free(nm.x);
224    ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
225    return 0;
226}
227
228static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
229                            const ASN1_ITEM *it, int tag, int aclass)
230{
231    int ret;
232    X509_NAME *a = (X509_NAME *)*val;
233    if (a->modified) {
234        ret = x509_name_encode((X509_NAME *)a);
235        if (ret < 0)
236            return ret;
237    }
238    ret = a->bytes->length;
239    if (out != NULL) {
240        memcpy(*out, a->bytes->data, ret);
241        *out += ret;
242    }
243    return ret;
244}
245
246static int x509_name_encode(X509_NAME *a)
247{
248    union {
249        STACK *s;
250        ASN1_VALUE *a;
251    } intname = {
252        NULL
253    };
254    int len;
255    unsigned char *p;
256    STACK_OF(X509_NAME_ENTRY) *entries = NULL;
257    X509_NAME_ENTRY *entry;
258    int i, set = -1;
259    intname.s = sk_new_null();
260    if (!intname.s)
261        goto memerr;
262    for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
263        entry = sk_X509_NAME_ENTRY_value(a->entries, i);
264        if (entry->set != set) {
265            entries = sk_X509_NAME_ENTRY_new_null();
266            if (!entries)
267                goto memerr;
268            if (!sk_push(intname.s, (char *)entries))
269                goto memerr;
270            set = entry->set;
271        }
272        if (!sk_X509_NAME_ENTRY_push(entries, entry))
273            goto memerr;
274    }
275    len = ASN1_item_ex_i2d(&intname.a, NULL,
276                           ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
277    if (!BUF_MEM_grow(a->bytes, len))
278        goto memerr;
279    p = (unsigned char *)a->bytes->data;
280    ASN1_item_ex_i2d(&intname.a,
281                     &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
282    sk_pop_free(intname.s, sk_internal_free);
283    a->modified = 0;
284    return len;
285 memerr:
286    sk_pop_free(intname.s, sk_internal_free);
287    ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
288    return -1;
289}
290
291int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
292{
293    X509_NAME *in;
294
295    if (!xn || !name)
296        return (0);
297
298    if (*xn != name) {
299        in = X509_NAME_dup(name);
300        if (in != NULL) {
301            X509_NAME_free(*xn);
302            *xn = in;
303        }
304    }
305    return (*xn != NULL);
306}
307
308IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
309
310IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)
311