1 | /* |
2 | * Copyright 1995-2018 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 <stdio.h> |
11 | #include "internal/cryptlib.h" |
12 | #include <openssl/evp.h> |
13 | #include <openssl/asn1t.h> |
14 | #include <openssl/x509.h> |
15 | #include <openssl/x509v3.h> |
16 | #include "crypto/x509.h" |
17 | |
18 | ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = { |
19 | ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0), |
20 | ASN1_EMBED(X509_CINF, serialNumber, ASN1_INTEGER), |
21 | ASN1_EMBED(X509_CINF, signature, X509_ALGOR), |
22 | ASN1_SIMPLE(X509_CINF, issuer, X509_NAME), |
23 | ASN1_EMBED(X509_CINF, validity, X509_VAL), |
24 | ASN1_SIMPLE(X509_CINF, subject, X509_NAME), |
25 | ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY), |
26 | ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1), |
27 | ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2), |
28 | ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3) |
29 | } ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF) |
30 | |
31 | IMPLEMENT_ASN1_FUNCTIONS(X509_CINF) |
32 | /* X509 top level structure needs a bit of customisation */ |
33 | |
34 | extern void policy_cache_free(X509_POLICY_CACHE *cache); |
35 | |
36 | static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, |
37 | void *exarg) |
38 | { |
39 | X509 *ret = (X509 *)*pval; |
40 | |
41 | switch (operation) { |
42 | |
43 | case ASN1_OP_D2I_PRE: |
44 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); |
45 | X509_CERT_AUX_free(ret->aux); |
46 | ASN1_OCTET_STRING_free(ret->skid); |
47 | AUTHORITY_KEYID_free(ret->akid); |
48 | CRL_DIST_POINTS_free(ret->crldp); |
49 | policy_cache_free(ret->policy_cache); |
50 | GENERAL_NAMES_free(ret->altname); |
51 | NAME_CONSTRAINTS_free(ret->nc); |
52 | #ifndef OPENSSL_NO_RFC3779 |
53 | sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free); |
54 | ASIdentifiers_free(ret->rfc3779_asid); |
55 | #endif |
56 | #ifndef OPENSSL_NO_SM2 |
57 | ASN1_OCTET_STRING_free(ret->sm2_id); |
58 | #endif |
59 | |
60 | /* fall thru */ |
61 | |
62 | case ASN1_OP_NEW_POST: |
63 | ret->ex_cached = 0; |
64 | ret->ex_kusage = 0; |
65 | ret->ex_xkusage = 0; |
66 | ret->ex_nscert = 0; |
67 | ret->ex_flags = 0; |
68 | ret->ex_pathlen = -1; |
69 | ret->ex_pcpathlen = -1; |
70 | ret->skid = NULL; |
71 | ret->akid = NULL; |
72 | ret->policy_cache = NULL; |
73 | ret->altname = NULL; |
74 | ret->nc = NULL; |
75 | #ifndef OPENSSL_NO_RFC3779 |
76 | ret->rfc3779_addr = NULL; |
77 | ret->rfc3779_asid = NULL; |
78 | #endif |
79 | #ifndef OPENSSL_NO_SM2 |
80 | ret->sm2_id = NULL; |
81 | #endif |
82 | ret->aux = NULL; |
83 | ret->crldp = NULL; |
84 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data)) |
85 | return 0; |
86 | break; |
87 | |
88 | case ASN1_OP_FREE_POST: |
89 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data); |
90 | X509_CERT_AUX_free(ret->aux); |
91 | ASN1_OCTET_STRING_free(ret->skid); |
92 | AUTHORITY_KEYID_free(ret->akid); |
93 | CRL_DIST_POINTS_free(ret->crldp); |
94 | policy_cache_free(ret->policy_cache); |
95 | GENERAL_NAMES_free(ret->altname); |
96 | NAME_CONSTRAINTS_free(ret->nc); |
97 | #ifndef OPENSSL_NO_RFC3779 |
98 | sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free); |
99 | ASIdentifiers_free(ret->rfc3779_asid); |
100 | #endif |
101 | #ifndef OPENSSL_NO_SM2 |
102 | ASN1_OCTET_STRING_free(ret->sm2_id); |
103 | #endif |
104 | break; |
105 | |
106 | } |
107 | |
108 | return 1; |
109 | |
110 | } |
111 | |
112 | ASN1_SEQUENCE_ref(X509, x509_cb) = { |
113 | ASN1_EMBED(X509, cert_info, X509_CINF), |
114 | ASN1_EMBED(X509, sig_alg, X509_ALGOR), |
115 | ASN1_EMBED(X509, signature, ASN1_BIT_STRING) |
116 | } ASN1_SEQUENCE_END_ref(X509, X509) |
117 | |
118 | IMPLEMENT_ASN1_FUNCTIONS(X509) |
119 | IMPLEMENT_ASN1_DUP_FUNCTION(X509) |
120 | |
121 | int X509_set_ex_data(X509 *r, int idx, void *arg) |
122 | { |
123 | return CRYPTO_set_ex_data(&r->ex_data, idx, arg); |
124 | } |
125 | |
126 | void *X509_get_ex_data(X509 *r, int idx) |
127 | { |
128 | return CRYPTO_get_ex_data(&r->ex_data, idx); |
129 | } |
130 | |
131 | /* |
132 | * X509_AUX ASN1 routines. X509_AUX is the name given to a certificate with |
133 | * extra info tagged on the end. Since these functions set how a certificate |
134 | * is trusted they should only be used when the certificate comes from a |
135 | * reliable source such as local storage. |
136 | */ |
137 | |
138 | X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length) |
139 | { |
140 | const unsigned char *q; |
141 | X509 *ret; |
142 | int freeret = 0; |
143 | |
144 | /* Save start position */ |
145 | q = *pp; |
146 | |
147 | if (a == NULL || *a == NULL) |
148 | freeret = 1; |
149 | ret = d2i_X509(a, &q, length); |
150 | /* If certificate unreadable then forget it */ |
151 | if (ret == NULL) |
152 | return NULL; |
153 | /* update length */ |
154 | length -= q - *pp; |
155 | if (length > 0 && !d2i_X509_CERT_AUX(&ret->aux, &q, length)) |
156 | goto err; |
157 | *pp = q; |
158 | return ret; |
159 | err: |
160 | if (freeret) { |
161 | X509_free(ret); |
162 | if (a) |
163 | *a = NULL; |
164 | } |
165 | return NULL; |
166 | } |
167 | |
168 | /* |
169 | * Serialize trusted certificate to *pp or just return the required buffer |
170 | * length if pp == NULL. We ultimately want to avoid modifying *pp in the |
171 | * error path, but that depends on similar hygiene in lower-level functions. |
172 | * Here we avoid compounding the problem. |
173 | */ |
174 | static int i2d_x509_aux_internal(const X509 *a, unsigned char **pp) |
175 | { |
176 | int length, tmplen; |
177 | unsigned char *start = pp != NULL ? *pp : NULL; |
178 | |
179 | /* |
180 | * This might perturb *pp on error, but fixing that belongs in i2d_X509() |
181 | * not here. It should be that if a == NULL length is zero, but we check |
182 | * both just in case. |
183 | */ |
184 | length = i2d_X509(a, pp); |
185 | if (length <= 0 || a == NULL) |
186 | return length; |
187 | |
188 | tmplen = i2d_X509_CERT_AUX(a->aux, pp); |
189 | if (tmplen < 0) { |
190 | if (start != NULL) |
191 | *pp = start; |
192 | return tmplen; |
193 | } |
194 | length += tmplen; |
195 | |
196 | return length; |
197 | } |
198 | |
199 | /* |
200 | * Serialize trusted certificate to *pp, or just return the required buffer |
201 | * length if pp == NULL. |
202 | * |
203 | * When pp is not NULL, but *pp == NULL, we allocate the buffer, but since |
204 | * we're writing two ASN.1 objects back to back, we can't have i2d_X509() do |
205 | * the allocation, nor can we allow i2d_X509_CERT_AUX() to increment the |
206 | * allocated buffer. |
207 | */ |
208 | int i2d_X509_AUX(const X509 *a, unsigned char **pp) |
209 | { |
210 | int length; |
211 | unsigned char *tmp; |
212 | |
213 | /* Buffer provided by caller */ |
214 | if (pp == NULL || *pp != NULL) |
215 | return i2d_x509_aux_internal(a, pp); |
216 | |
217 | /* Obtain the combined length */ |
218 | if ((length = i2d_x509_aux_internal(a, NULL)) <= 0) |
219 | return length; |
220 | |
221 | /* Allocate requisite combined storage */ |
222 | *pp = tmp = OPENSSL_malloc(length); |
223 | if (tmp == NULL) { |
224 | X509err(X509_F_I2D_X509_AUX, ERR_R_MALLOC_FAILURE); |
225 | return -1; |
226 | } |
227 | |
228 | /* Encode, but keep *pp at the originally malloced pointer */ |
229 | length = i2d_x509_aux_internal(a, &tmp); |
230 | if (length <= 0) { |
231 | OPENSSL_free(*pp); |
232 | *pp = NULL; |
233 | } |
234 | return length; |
235 | } |
236 | |
237 | int i2d_re_X509_tbs(X509 *x, unsigned char **pp) |
238 | { |
239 | x->cert_info.enc.modified = 1; |
240 | return i2d_X509_CINF(&x->cert_info, pp); |
241 | } |
242 | |
243 | void X509_get0_signature(const ASN1_BIT_STRING **psig, |
244 | const X509_ALGOR **palg, const X509 *x) |
245 | { |
246 | if (psig) |
247 | *psig = &x->signature; |
248 | if (palg) |
249 | *palg = &x->sig_alg; |
250 | } |
251 | |
252 | int X509_get_signature_nid(const X509 *x) |
253 | { |
254 | return OBJ_obj2nid(x->sig_alg.algorithm); |
255 | } |
256 | |
257 | #ifndef OPENSSL_NO_SM2 |
258 | void X509_set0_sm2_id(X509 *x, ASN1_OCTET_STRING *sm2_id) |
259 | { |
260 | ASN1_OCTET_STRING_free(x->sm2_id); |
261 | x->sm2_id = sm2_id; |
262 | } |
263 | |
264 | ASN1_OCTET_STRING *X509_get0_sm2_id(X509 *x) |
265 | { |
266 | return x->sm2_id; |
267 | } |
268 | #endif |
269 | |