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Commit | Line | Data |
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0f113f3e | 1 | /* |
28428130 | 2 | * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved. |
9d6b1ce6 | 3 | * |
365a2d99 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
2039c421 RS |
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 | |
9d6b1ce6 DSH |
8 | */ |
9 | ||
9d6b1ce6 | 10 | #include <stddef.h> |
3ebac273 | 11 | #include <string.h> |
5f8dd0f8 | 12 | #include "internal/cryptlib.h" |
cd420b0b | 13 | #include "internal/refcount.h" |
9d6b1ce6 DSH |
14 | #include <openssl/asn1.h> |
15 | #include <openssl/asn1t.h> | |
16 | #include <openssl/objects.h> | |
17 | #include <openssl/err.h> | |
706457b7 | 18 | #include "asn1_local.h" |
9d6b1ce6 DSH |
19 | |
20 | /* Utility functions for manipulating fields and offsets */ | |
21 | ||
22 | /* Add 'offset' to 'addr' */ | |
23 | #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset) | |
24 | ||
0f113f3e MC |
25 | /* |
26 | * Given an ASN1_ITEM CHOICE type return the selector value | |
9d6b1ce6 DSH |
27 | */ |
28 | ||
29 | int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e MC |
30 | { |
31 | int *sel = offset2ptr(*pval, it->utype); | |
9fdcc21f DO |
32 | |
33 | return *sel; | |
34 | } | |
35 | ||
36 | int asn1_get_choice_selector_const(const ASN1_VALUE **pval, const ASN1_ITEM *it) | |
37 | { | |
38 | int *sel = offset2ptr(*pval, it->utype); | |
39 | ||
0f113f3e MC |
40 | return *sel; |
41 | } | |
9d6b1ce6 | 42 | |
0f113f3e MC |
43 | /* |
44 | * Given an ASN1_ITEM CHOICE type set the selector value, return old value. | |
9d6b1ce6 DSH |
45 | */ |
46 | ||
0f113f3e MC |
47 | int asn1_set_choice_selector(ASN1_VALUE **pval, int value, |
48 | const ASN1_ITEM *it) | |
49 | { | |
50 | int *sel, ret; | |
9fdcc21f | 51 | |
0f113f3e MC |
52 | sel = offset2ptr(*pval, it->utype); |
53 | ret = *sel; | |
54 | *sel = value; | |
55 | return ret; | |
56 | } | |
9d6b1ce6 | 57 | |
0f113f3e | 58 | /* |
687b4868 F |
59 | * Do atomic reference counting. The value 'op' decides what to do. |
60 | * If it is +1 then the count is incremented. | |
61 | * If |op| is 0, lock is initialised and count is set to 1. | |
62 | * If |op| is -1, count is decremented and the return value is the current | |
63 | * reference count or 0 if no reference count is active. | |
64 | * It returns -1 on initialisation error. | |
65 | * Used by ASN1_SEQUENCE construct of X509, X509_REQ, X509_CRL objects | |
9d6b1ce6 | 66 | */ |
9d6b1ce6 | 67 | int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) |
0f113f3e MC |
68 | { |
69 | const ASN1_AUX *aux; | |
680b9d45 | 70 | CRYPTO_REF_COUNT *lck; |
c001ce33 | 71 | CRYPTO_RWLOCK **lock; |
680b9d45 AP |
72 | int ret = -1; |
73 | ||
0f113f3e MC |
74 | if ((it->itype != ASN1_ITYPE_SEQUENCE) |
75 | && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE)) | |
76 | return 0; | |
77 | aux = it->funcs; | |
9fdcc21f | 78 | if (aux == NULL || (aux->flags & ASN1_AFLG_REFCOUNT) == 0) |
0f113f3e MC |
79 | return 0; |
80 | lck = offset2ptr(*pval, aux->ref_offset); | |
c001ce33 | 81 | lock = offset2ptr(*pval, aux->ref_lock); |
680b9d45 AP |
82 | |
83 | switch (op) { | |
84 | case 0: | |
85 | *lck = ret = 1; | |
c001ce33 | 86 | *lock = CRYPTO_THREAD_lock_new(); |
b2b361f6 | 87 | if (*lock == NULL) { |
687b4868 F |
88 | ASN1err(ASN1_F_ASN1_DO_LOCK, ERR_R_MALLOC_FAILURE); |
89 | return -1; | |
b2b361f6 | 90 | } |
680b9d45 AP |
91 | break; |
92 | case 1: | |
93 | if (!CRYPTO_UP_REF(lck, &ret, *lock)) | |
94 | return -1; | |
95 | break; | |
96 | case -1: | |
97 | if (!CRYPTO_DOWN_REF(lck, &ret, *lock)) | |
98 | return -1; /* failed */ | |
9d6b1ce6 | 99 | #ifdef REF_PRINT |
680b9d45 | 100 | fprintf(stderr, "%p:%4d:%s\n", it, ret, it->sname); |
9d6b1ce6 | 101 | #endif |
680b9d45 AP |
102 | REF_ASSERT_ISNT(ret < 0); |
103 | if (ret == 0) { | |
104 | CRYPTO_THREAD_lock_free(*lock); | |
105 | *lock = NULL; | |
106 | } | |
107 | break; | |
687b4868 | 108 | } |
680b9d45 | 109 | |
0f113f3e MC |
110 | return ret; |
111 | } | |
9d6b1ce6 DSH |
112 | |
113 | static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e MC |
114 | { |
115 | const ASN1_AUX *aux; | |
9fdcc21f DO |
116 | |
117 | if (pval == NULL || *pval == NULL) | |
0f113f3e MC |
118 | return NULL; |
119 | aux = it->funcs; | |
9fdcc21f DO |
120 | if (aux == NULL || (aux->flags & ASN1_AFLG_ENCODING) == 0) |
121 | return NULL; | |
122 | return offset2ptr(*pval, aux->enc_offset); | |
123 | } | |
124 | ||
125 | static const ASN1_ENCODING *asn1_get_const_enc_ptr(const ASN1_VALUE **pval, | |
126 | const ASN1_ITEM *it) | |
127 | { | |
128 | const ASN1_AUX *aux; | |
129 | ||
130 | if (pval == NULL || *pval == NULL) | |
131 | return NULL; | |
132 | aux = it->funcs; | |
133 | if (aux == NULL || (aux->flags & ASN1_AFLG_ENCODING) == 0) | |
0f113f3e MC |
134 | return NULL; |
135 | return offset2ptr(*pval, aux->enc_offset); | |
136 | } | |
9d6b1ce6 DSH |
137 | |
138 | void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e | 139 | { |
9fdcc21f DO |
140 | ASN1_ENCODING *enc = asn1_get_enc_ptr(pval, it); |
141 | ||
142 | if (enc != NULL) { | |
0f113f3e MC |
143 | enc->enc = NULL; |
144 | enc->len = 0; | |
145 | enc->modified = 1; | |
146 | } | |
147 | } | |
9d6b1ce6 DSH |
148 | |
149 | void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e | 150 | { |
9fdcc21f DO |
151 | ASN1_ENCODING *enc = asn1_get_enc_ptr(pval, it); |
152 | ||
153 | if (enc != NULL) { | |
b548a1f1 | 154 | OPENSSL_free(enc->enc); |
0f113f3e MC |
155 | enc->enc = NULL; |
156 | enc->len = 0; | |
157 | enc->modified = 1; | |
158 | } | |
159 | } | |
9d6b1ce6 | 160 | |
f3f52d7f | 161 | int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, |
0f113f3e MC |
162 | const ASN1_ITEM *it) |
163 | { | |
9fdcc21f DO |
164 | ASN1_ENCODING *enc = asn1_get_enc_ptr(pval, it); |
165 | ||
166 | if (enc == NULL) | |
0f113f3e MC |
167 | return 1; |
168 | ||
b548a1f1 | 169 | OPENSSL_free(enc->enc); |
cdb10bae RS |
170 | if ((enc->enc = OPENSSL_malloc(inlen)) == NULL) { |
171 | ASN1err(ASN1_F_ASN1_ENC_SAVE, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 172 | return 0; |
cdb10bae | 173 | } |
0f113f3e MC |
174 | memcpy(enc->enc, in, inlen); |
175 | enc->len = inlen; | |
176 | enc->modified = 0; | |
9d6b1ce6 | 177 | |
0f113f3e MC |
178 | return 1; |
179 | } | |
9d6b1ce6 | 180 | |
9fdcc21f | 181 | int asn1_enc_restore(int *len, unsigned char **out, const ASN1_VALUE **pval, |
0f113f3e MC |
182 | const ASN1_ITEM *it) |
183 | { | |
9fdcc21f DO |
184 | const ASN1_ENCODING *enc = asn1_get_const_enc_ptr(pval, it); |
185 | ||
186 | if (enc == NULL || enc->modified) | |
0f113f3e MC |
187 | return 0; |
188 | if (out) { | |
189 | memcpy(*out, enc->enc, enc->len); | |
190 | *out += enc->len; | |
191 | } | |
9fdcc21f | 192 | if (len != NULL) |
0f113f3e MC |
193 | *len = enc->len; |
194 | return 1; | |
195 | } | |
9d6b1ce6 DSH |
196 | |
197 | /* Given an ASN1_TEMPLATE get a pointer to a field */ | |
0f113f3e MC |
198 | ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) |
199 | { | |
9fdcc21f DO |
200 | ASN1_VALUE **pvaltmp = offset2ptr(*pval, tt->offset); |
201 | ||
0f113f3e MC |
202 | /* |
203 | * NOTE for BOOLEAN types the field is just a plain int so we can't | |
204 | * return int **, so settle for (int *). | |
205 | */ | |
206 | return pvaltmp; | |
207 | } | |
9d6b1ce6 | 208 | |
9fdcc21f DO |
209 | /* Given an ASN1_TEMPLATE get a const pointer to a field */ |
210 | const ASN1_VALUE **asn1_get_const_field_ptr(const ASN1_VALUE **pval, | |
211 | const ASN1_TEMPLATE *tt) | |
212 | { | |
213 | return offset2ptr(*pval, tt->offset); | |
214 | } | |
215 | ||
0f113f3e MC |
216 | /* |
217 | * Handle ANY DEFINED BY template, find the selector, look up the relevant | |
218 | * ASN1_TEMPLATE in the table and return it. | |
9d6b1ce6 DSH |
219 | */ |
220 | ||
9fdcc21f DO |
221 | const ASN1_TEMPLATE *asn1_do_adb(const ASN1_VALUE *val, |
222 | const ASN1_TEMPLATE *tt, | |
0f113f3e MC |
223 | int nullerr) |
224 | { | |
225 | const ASN1_ADB *adb; | |
226 | const ASN1_ADB_TABLE *atbl; | |
227 | long selector; | |
9fdcc21f | 228 | const ASN1_VALUE **sfld; |
0f113f3e | 229 | int i; |
9fdcc21f DO |
230 | |
231 | if ((tt->flags & ASN1_TFLG_ADB_MASK) == 0) | |
0f113f3e MC |
232 | return tt; |
233 | ||
234 | /* Else ANY DEFINED BY ... get the table */ | |
235 | adb = ASN1_ADB_ptr(tt->item); | |
9d6b1ce6 | 236 | |
0f113f3e | 237 | /* Get the selector field */ |
9fdcc21f | 238 | sfld = offset2ptr(val, adb->offset); |
9d6b1ce6 | 239 | |
0f113f3e | 240 | /* Check if NULL */ |
7c46746b | 241 | if (*sfld == NULL) { |
9fdcc21f | 242 | if (adb->null_tt == NULL) |
0f113f3e MC |
243 | goto err; |
244 | return adb->null_tt; | |
245 | } | |
9d6b1ce6 | 246 | |
0f113f3e MC |
247 | /* |
248 | * Convert type to a long: NB: don't check for NID_undef here because it | |
249 | * might be a legitimate value in the table | |
250 | */ | |
9fdcc21f | 251 | if ((tt->flags & ASN1_TFLG_ADB_OID) != 0) |
0f113f3e MC |
252 | selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); |
253 | else | |
254 | selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); | |
9d6b1ce6 | 255 | |
5b70372d DSH |
256 | /* Let application callback translate value */ |
257 | if (adb->adb_cb != NULL && adb->adb_cb(&selector) == 0) { | |
258 | ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); | |
259 | return NULL; | |
260 | } | |
261 | ||
0f113f3e MC |
262 | /* |
263 | * Try to find matching entry in table Maybe should check application | |
264 | * types first to allow application override? Might also be useful to | |
265 | * have a flag which indicates table is sorted and we can do a binary | |
266 | * search. For now stick to a linear search. | |
267 | */ | |
9d6b1ce6 | 268 | |
0f113f3e MC |
269 | for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) |
270 | if (atbl->value == selector) | |
271 | return &atbl->tt; | |
9d6b1ce6 | 272 | |
0f113f3e | 273 | /* FIXME: need to search application table too */ |
9d6b1ce6 | 274 | |
0f113f3e MC |
275 | /* No match, return default type */ |
276 | if (!adb->default_tt) | |
277 | goto err; | |
278 | return adb->default_tt; | |
9d6b1ce6 | 279 | |
0f113f3e MC |
280 | err: |
281 | /* FIXME: should log the value or OID of unsupported type */ | |
282 | if (nullerr) | |
283 | ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); | |
284 | return NULL; | |
285 | } |