1 /*
2 * Copyright 2006-2022 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 <openssl/objects.h>
11 #include "obj_xref.h"
12 #include "internal/nelem.h"
13 #include "internal/thread_once.h"
14 #include <openssl/err.h>
15
16 static STACK_OF(nid_triple) *sig_app, *sigx_app;
17 static CRYPTO_RWLOCK *sig_lock;
18
sig_cmp(const nid_triple * a,const nid_triple * b)19 static int sig_cmp(const nid_triple *a, const nid_triple *b)
20 {
21 return a->sign_id - b->sign_id;
22 }
23
24 DECLARE_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
25 IMPLEMENT_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
26
sig_sk_cmp(const nid_triple * const * a,const nid_triple * const * b)27 static int sig_sk_cmp(const nid_triple *const *a, const nid_triple *const *b)
28 {
29 return (*a)->sign_id - (*b)->sign_id;
30 }
31
32 DECLARE_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
33
sigx_cmp(const nid_triple * const * a,const nid_triple * const * b)34 static int sigx_cmp(const nid_triple *const *a, const nid_triple *const *b)
35 {
36 int ret;
37
38 ret = (*a)->hash_id - (*b)->hash_id;
39 /* The "b" side of the comparison carries the algorithms already
40 * registered. A NID_undef for 'hash_id' there means that the
41 * signature algorithm doesn't need a digest to operate OK. In
42 * such case, any hash_id/digest algorithm on the test side (a),
43 * incl. NID_undef, is acceptable. signature algorithm NID
44 * (pkey_id) must match in any case.
45 */
46 if ((ret != 0) && ((*b)->hash_id != NID_undef))
47 return ret;
48 return (*a)->pkey_id - (*b)->pkey_id;
49 }
50
51 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
52
53 static CRYPTO_ONCE sig_init = CRYPTO_ONCE_STATIC_INIT;
54
DEFINE_RUN_ONCE_STATIC(o_sig_init)55 DEFINE_RUN_ONCE_STATIC(o_sig_init)
56 {
57 sig_lock = CRYPTO_THREAD_lock_new();
58 return sig_lock != NULL;
59 }
60
obj_sig_init(void)61 static ossl_inline int obj_sig_init(void)
62 {
63 return RUN_ONCE(&sig_init, o_sig_init);
64 }
65
ossl_obj_find_sigid_algs(int signid,int * pdig_nid,int * ppkey_nid,int lock)66 static int ossl_obj_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid,
67 int lock)
68 {
69 nid_triple tmp;
70 const nid_triple *rv;
71 int idx;
72
73 if (signid == NID_undef)
74 return 0;
75
76 tmp.sign_id = signid;
77 rv = OBJ_bsearch_sig(&tmp, sigoid_srt, OSSL_NELEM(sigoid_srt));
78 if (rv == NULL) {
79 if (!obj_sig_init())
80 return 0;
81 if (lock && !CRYPTO_THREAD_read_lock(sig_lock)) {
82 ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
83 return 0;
84 }
85 if (sig_app != NULL) {
86 idx = sk_nid_triple_find(sig_app, &tmp);
87 if (idx >= 0)
88 rv = sk_nid_triple_value(sig_app, idx);
89 }
90 if (lock)
91 CRYPTO_THREAD_unlock(sig_lock);
92 if (rv == NULL)
93 return 0;
94 }
95
96 if (pdig_nid != NULL)
97 *pdig_nid = rv->hash_id;
98 if (ppkey_nid != NULL)
99 *ppkey_nid = rv->pkey_id;
100 return 1;
101 }
102
OBJ_find_sigid_algs(int signid,int * pdig_nid,int * ppkey_nid)103 int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
104 {
105 return ossl_obj_find_sigid_algs(signid, pdig_nid, ppkey_nid, 1);
106 }
107
OBJ_find_sigid_by_algs(int * psignid,int dig_nid,int pkey_nid)108 int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
109 {
110 nid_triple tmp;
111 const nid_triple *t = &tmp;
112 const nid_triple **rv;
113 int idx;
114
115 /* permitting searches for sig algs without digest: */
116 if (pkey_nid == NID_undef)
117 return 0;
118
119 tmp.hash_id = dig_nid;
120 tmp.pkey_id = pkey_nid;
121
122 rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref, OSSL_NELEM(sigoid_srt_xref));
123 if (rv == NULL) {
124 if (!obj_sig_init())
125 return 0;
126 if (!CRYPTO_THREAD_read_lock(sig_lock)) {
127 ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
128 return 0;
129 }
130 if (sigx_app != NULL) {
131 idx = sk_nid_triple_find(sigx_app, &tmp);
132 if (idx >= 0) {
133 t = sk_nid_triple_value(sigx_app, idx);
134 rv = &t;
135 }
136 }
137 CRYPTO_THREAD_unlock(sig_lock);
138 if (rv == NULL)
139 return 0;
140 }
141
142 if (psignid != NULL)
143 *psignid = (*rv)->sign_id;
144 return 1;
145 }
146
OBJ_add_sigid(int signid,int dig_id,int pkey_id)147 int OBJ_add_sigid(int signid, int dig_id, int pkey_id)
148 {
149 nid_triple *ntr;
150 int dnid = NID_undef, pnid = NID_undef, ret = 0;
151
152 if (signid == NID_undef || pkey_id == NID_undef)
153 return 0;
154
155 if (!obj_sig_init())
156 return 0;
157
158 if ((ntr = OPENSSL_malloc(sizeof(*ntr))) == NULL)
159 return 0;
160 ntr->sign_id = signid;
161 ntr->hash_id = dig_id;
162 ntr->pkey_id = pkey_id;
163
164 if (!CRYPTO_THREAD_write_lock(sig_lock)) {
165 ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
166 OPENSSL_free(ntr);
167 return 0;
168 }
169
170 /* Check that the entry doesn't exist or exists as desired */
171 if (ossl_obj_find_sigid_algs(signid, &dnid, &pnid, 0)) {
172 ret = dnid == dig_id && pnid == pkey_id;
173 goto err;
174 }
175
176 if (sig_app == NULL) {
177 sig_app = sk_nid_triple_new(sig_sk_cmp);
178 if (sig_app == NULL)
179 goto err;
180 }
181 if (sigx_app == NULL) {
182 sigx_app = sk_nid_triple_new(sigx_cmp);
183 if (sigx_app == NULL)
184 goto err;
185 }
186
187 /*
188 * Better might be to find where to insert the element and insert it there.
189 * This would avoid the sorting steps below.
190 */
191 if (!sk_nid_triple_push(sig_app, ntr))
192 goto err;
193 if (!sk_nid_triple_push(sigx_app, ntr)) {
194 ntr = NULL; /* This is referenced by sig_app still */
195 goto err;
196 }
197
198 sk_nid_triple_sort(sig_app);
199 sk_nid_triple_sort(sigx_app);
200
201 ntr = NULL;
202 ret = 1;
203 err:
204 OPENSSL_free(ntr);
205 CRYPTO_THREAD_unlock(sig_lock);
206 return ret;
207 }
208
sid_free(nid_triple * tt)209 static void sid_free(nid_triple *tt)
210 {
211 OPENSSL_free(tt);
212 }
213
OBJ_sigid_free(void)214 void OBJ_sigid_free(void)
215 {
216 sk_nid_triple_pop_free(sig_app, sid_free);
217 sk_nid_triple_free(sigx_app);
218 CRYPTO_THREAD_lock_free(sig_lock);
219 sig_app = NULL;
220 sigx_app = NULL;
221 sig_lock = NULL;
222 }
223
