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Commit | Line | Data |
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0f113f3e | 1 | /* |
677963e5 | 2 | * Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved. |
9d6b1ce6 | 3 | * |
2039c421 RS |
4 | * Licensed under the OpenSSL license (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 | |
9d6b1ce6 DSH |
8 | */ |
9 | ||
9d6b1ce6 | 10 | #include <stddef.h> |
3ebac273 | 11 | #include <string.h> |
5f8dd0f8 | 12 | #include "internal/cryptlib.h" |
677963e5 | 13 | #include "e_os.h" |
9d6b1ce6 DSH |
14 | #include <openssl/asn1.h> |
15 | #include <openssl/asn1t.h> | |
16 | #include <openssl/objects.h> | |
17 | #include <openssl/err.h> | |
c1ee50aa | 18 | #include "asn1_locl.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); | |
32 | return *sel; | |
33 | } | |
9d6b1ce6 | 34 | |
0f113f3e MC |
35 | /* |
36 | * Given an ASN1_ITEM CHOICE type set the selector value, return old value. | |
9d6b1ce6 DSH |
37 | */ |
38 | ||
0f113f3e MC |
39 | int asn1_set_choice_selector(ASN1_VALUE **pval, int value, |
40 | const ASN1_ITEM *it) | |
41 | { | |
42 | int *sel, ret; | |
43 | sel = offset2ptr(*pval, it->utype); | |
44 | ret = *sel; | |
45 | *sel = value; | |
46 | return ret; | |
47 | } | |
9d6b1ce6 | 48 | |
0f113f3e | 49 | /* |
687b4868 F |
50 | * Do atomic reference counting. The value 'op' decides what to do. |
51 | * If it is +1 then the count is incremented. | |
52 | * If |op| is 0, lock is initialised and count is set to 1. | |
53 | * If |op| is -1, count is decremented and the return value is the current | |
54 | * reference count or 0 if no reference count is active. | |
55 | * It returns -1 on initialisation error. | |
56 | * Used by ASN1_SEQUENCE construct of X509, X509_REQ, X509_CRL objects | |
9d6b1ce6 | 57 | */ |
9d6b1ce6 | 58 | int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) |
0f113f3e MC |
59 | { |
60 | const ASN1_AUX *aux; | |
61 | int *lck, ret; | |
c001ce33 | 62 | CRYPTO_RWLOCK **lock; |
0f113f3e MC |
63 | if ((it->itype != ASN1_ITYPE_SEQUENCE) |
64 | && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE)) | |
65 | return 0; | |
66 | aux = it->funcs; | |
67 | if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) | |
68 | return 0; | |
69 | lck = offset2ptr(*pval, aux->ref_offset); | |
c001ce33 | 70 | lock = offset2ptr(*pval, aux->ref_lock); |
0f113f3e MC |
71 | if (op == 0) { |
72 | *lck = 1; | |
c001ce33 | 73 | *lock = CRYPTO_THREAD_lock_new(); |
b2b361f6 | 74 | if (*lock == NULL) { |
687b4868 F |
75 | ASN1err(ASN1_F_ASN1_DO_LOCK, ERR_R_MALLOC_FAILURE); |
76 | return -1; | |
b2b361f6 | 77 | } |
0f113f3e MC |
78 | return 1; |
79 | } | |
687b4868 F |
80 | if (CRYPTO_atomic_add(lck, op, &ret, *lock) < 0) |
81 | return -1; /* failed */ | |
9d6b1ce6 | 82 | #ifdef REF_PRINT |
f3f1cf84 | 83 | fprintf(stderr, "%p:%4d:%s\n", it, *lck, it->sname); |
9d6b1ce6 | 84 | #endif |
f3f1cf84 | 85 | REF_ASSERT_ISNT(ret < 0); |
687b4868 | 86 | if (ret == 0) { |
c001ce33 | 87 | CRYPTO_THREAD_lock_free(*lock); |
687b4868 F |
88 | *lock = NULL; |
89 | } | |
0f113f3e MC |
90 | return ret; |
91 | } | |
9d6b1ce6 DSH |
92 | |
93 | static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e MC |
94 | { |
95 | const ASN1_AUX *aux; | |
96 | if (!pval || !*pval) | |
97 | return NULL; | |
98 | aux = it->funcs; | |
99 | if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) | |
100 | return NULL; | |
101 | return offset2ptr(*pval, aux->enc_offset); | |
102 | } | |
9d6b1ce6 DSH |
103 | |
104 | void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e MC |
105 | { |
106 | ASN1_ENCODING *enc; | |
107 | enc = asn1_get_enc_ptr(pval, it); | |
108 | if (enc) { | |
109 | enc->enc = NULL; | |
110 | enc->len = 0; | |
111 | enc->modified = 1; | |
112 | } | |
113 | } | |
9d6b1ce6 DSH |
114 | |
115 | void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
0f113f3e MC |
116 | { |
117 | ASN1_ENCODING *enc; | |
118 | enc = asn1_get_enc_ptr(pval, it); | |
119 | if (enc) { | |
b548a1f1 | 120 | OPENSSL_free(enc->enc); |
0f113f3e MC |
121 | enc->enc = NULL; |
122 | enc->len = 0; | |
123 | enc->modified = 1; | |
124 | } | |
125 | } | |
9d6b1ce6 | 126 | |
f3f52d7f | 127 | int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, |
0f113f3e MC |
128 | const ASN1_ITEM *it) |
129 | { | |
130 | ASN1_ENCODING *enc; | |
131 | enc = asn1_get_enc_ptr(pval, it); | |
132 | if (!enc) | |
133 | return 1; | |
134 | ||
b548a1f1 | 135 | OPENSSL_free(enc->enc); |
0f113f3e | 136 | enc->enc = OPENSSL_malloc(inlen); |
90945fa3 | 137 | if (enc->enc == NULL) |
0f113f3e MC |
138 | return 0; |
139 | memcpy(enc->enc, in, inlen); | |
140 | enc->len = inlen; | |
141 | enc->modified = 0; | |
9d6b1ce6 | 142 | |
0f113f3e MC |
143 | return 1; |
144 | } | |
9d6b1ce6 | 145 | |
f3f52d7f | 146 | int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, |
0f113f3e MC |
147 | const ASN1_ITEM *it) |
148 | { | |
149 | ASN1_ENCODING *enc; | |
150 | enc = asn1_get_enc_ptr(pval, it); | |
151 | if (!enc || enc->modified) | |
152 | return 0; | |
153 | if (out) { | |
154 | memcpy(*out, enc->enc, enc->len); | |
155 | *out += enc->len; | |
156 | } | |
157 | if (len) | |
158 | *len = enc->len; | |
159 | return 1; | |
160 | } | |
9d6b1ce6 DSH |
161 | |
162 | /* Given an ASN1_TEMPLATE get a pointer to a field */ | |
0f113f3e MC |
163 | ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) |
164 | { | |
165 | ASN1_VALUE **pvaltmp; | |
0f113f3e MC |
166 | pvaltmp = offset2ptr(*pval, tt->offset); |
167 | /* | |
168 | * NOTE for BOOLEAN types the field is just a plain int so we can't | |
169 | * return int **, so settle for (int *). | |
170 | */ | |
171 | return pvaltmp; | |
172 | } | |
9d6b1ce6 | 173 | |
0f113f3e MC |
174 | /* |
175 | * Handle ANY DEFINED BY template, find the selector, look up the relevant | |
176 | * ASN1_TEMPLATE in the table and return it. | |
9d6b1ce6 DSH |
177 | */ |
178 | ||
f3f52d7f | 179 | const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, |
0f113f3e MC |
180 | int nullerr) |
181 | { | |
182 | const ASN1_ADB *adb; | |
183 | const ASN1_ADB_TABLE *atbl; | |
184 | long selector; | |
185 | ASN1_VALUE **sfld; | |
186 | int i; | |
187 | if (!(tt->flags & ASN1_TFLG_ADB_MASK)) | |
188 | return tt; | |
189 | ||
190 | /* Else ANY DEFINED BY ... get the table */ | |
191 | adb = ASN1_ADB_ptr(tt->item); | |
9d6b1ce6 | 192 | |
0f113f3e MC |
193 | /* Get the selector field */ |
194 | sfld = offset2ptr(*pval, adb->offset); | |
9d6b1ce6 | 195 | |
0f113f3e | 196 | /* Check if NULL */ |
7c46746b | 197 | if (*sfld == NULL) { |
0f113f3e MC |
198 | if (!adb->null_tt) |
199 | goto err; | |
200 | return adb->null_tt; | |
201 | } | |
9d6b1ce6 | 202 | |
0f113f3e MC |
203 | /* |
204 | * Convert type to a long: NB: don't check for NID_undef here because it | |
205 | * might be a legitimate value in the table | |
206 | */ | |
207 | if (tt->flags & ASN1_TFLG_ADB_OID) | |
208 | selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); | |
209 | else | |
210 | selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); | |
9d6b1ce6 | 211 | |
5b70372d DSH |
212 | /* Let application callback translate value */ |
213 | if (adb->adb_cb != NULL && adb->adb_cb(&selector) == 0) { | |
214 | ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); | |
215 | return NULL; | |
216 | } | |
217 | ||
0f113f3e MC |
218 | /* |
219 | * Try to find matching entry in table Maybe should check application | |
220 | * types first to allow application override? Might also be useful to | |
221 | * have a flag which indicates table is sorted and we can do a binary | |
222 | * search. For now stick to a linear search. | |
223 | */ | |
9d6b1ce6 | 224 | |
0f113f3e MC |
225 | for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) |
226 | if (atbl->value == selector) | |
227 | return &atbl->tt; | |
9d6b1ce6 | 228 | |
0f113f3e | 229 | /* FIXME: need to search application table too */ |
9d6b1ce6 | 230 | |
0f113f3e MC |
231 | /* No match, return default type */ |
232 | if (!adb->default_tt) | |
233 | goto err; | |
234 | return adb->default_tt; | |
9d6b1ce6 | 235 | |
0f113f3e MC |
236 | err: |
237 | /* FIXME: should log the value or OID of unsupported type */ | |
238 | if (nullerr) | |
239 | ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); | |
240 | return NULL; | |
241 | } |