lib/libcrypto/objects/obj_xref.c

   1 /* $OpenBSD: obj_xref.c,v 1.8 2017/01/21 04:44:43 jsing Exp $ */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2006.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <openssl/objects.h>
  60 #include "obj_xref.h"
  61
  62 DECLARE_STACK_OF(nid_triple)
  63 STACK_OF(nid_triple) *sig_app, *sigx_app;
  64
  65 static int
  66 sig_cmp(const nid_triple *a, const nid_triple *b)
  67 {
  68         return a->sign_id - b->sign_id;
  69 }
  70
  71 static int sig_cmp_BSEARCH_CMP_FN(const void *, const void *);
  72 static int sig_cmp(nid_triple const *, nid_triple const *);
  73 static nid_triple *OBJ_bsearch_sig(nid_triple *key, nid_triple const *base, int num);
  74
  75 static int
  76 sig_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
  77 {
  78         nid_triple const *a = a_;
  79         nid_triple const *b = b_;
  80         return sig_cmp(a, b);
  81 }
  82
  83 static nid_triple *
  84 OBJ_bsearch_sig(nid_triple *key, nid_triple const *base, int num)
  85 {
  86         return (nid_triple *)OBJ_bsearch_(key, base, num, sizeof(nid_triple),
  87             sig_cmp_BSEARCH_CMP_FN);
  88 }
  89
  90 static int
  91 sig_sk_cmp(const nid_triple * const *a, const nid_triple * const *b)
  92 {
  93         return (*a)->sign_id - (*b)->sign_id;
  94 }
  95
  96 static int sigx_cmp_BSEARCH_CMP_FN(const void *, const void *);
  97 static int sigx_cmp(const nid_triple * const *, const nid_triple * const *);
  98 static const nid_triple * *OBJ_bsearch_sigx(const nid_triple * *key, const nid_triple * const *base, int num);
  99
 100 static int
 101 sigx_cmp(const nid_triple * const *a, const nid_triple * const *b)
 102 {
 103         int ret;
 104
 105         ret = (*a)->hash_id - (*b)->hash_id;
 106         if (ret)
 107                 return ret;
 108         return (*a)->pkey_id - (*b)->pkey_id;
 109 }
 110
 111
 112 static int
 113 sigx_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
 114 {
 115         const nid_triple * const *a = a_;
 116         const nid_triple * const *b = b_;
 117         return sigx_cmp(a, b);
 118 }
 119
 120 static const nid_triple * *
 121 OBJ_bsearch_sigx(const nid_triple * *key, const nid_triple * const *base, int num)
 122 {
 123         return (const nid_triple * *)OBJ_bsearch_(key, base, num, sizeof(const nid_triple *),
 124             sigx_cmp_BSEARCH_CMP_FN);
 125 }
 126
 127 int
 128 OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
 129 {
 130         nid_triple tmp;
 131         const nid_triple *rv = NULL;
 132         tmp.sign_id = signid;
 133
 134         if (sig_app) {
 135                 int idx = sk_nid_triple_find(sig_app, &tmp);
 136                 if (idx >= 0)
 137                         rv = sk_nid_triple_value(sig_app, idx);
 138         }
 139
 140 #ifndef OBJ_XREF_TEST2
 141         if (rv == NULL) {
 142                 rv = OBJ_bsearch_sig(&tmp, sigoid_srt,
 143                     sizeof(sigoid_srt) / sizeof(nid_triple));
 144         }
 145 #endif
 146         if (rv == NULL)
 147                 return 0;
 148         if (pdig_nid)
 149                 *pdig_nid = rv->hash_id;
 150         if (ppkey_nid)
 151                 *ppkey_nid = rv->pkey_id;
 152         return 1;
 153 }
 154
 155 int
 156 OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
 157 {
 158         nid_triple tmp;
 159         const nid_triple *t = &tmp;
 160         const nid_triple **rv = NULL;
 161
 162         tmp.hash_id = dig_nid;
 163         tmp.pkey_id = pkey_nid;
 164
 165         if (sigx_app) {
 166                 int idx = sk_nid_triple_find(sigx_app, &tmp);
 167                 if (idx >= 0) {
 168                         t = sk_nid_triple_value(sigx_app, idx);
 169                         rv = &t;
 170                 }
 171         }
 172
 173 #ifndef OBJ_XREF_TEST2
 174         if (rv == NULL) {
 175                 rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref,
 176                     sizeof(sigoid_srt_xref) / sizeof(nid_triple *));
 177         }
 178 #endif
 179         if (rv == NULL)
 180                 return 0;
 181         if (psignid)
 182                 *psignid = (*rv)->sign_id;
 183         return 1;
 184 }
 185
 186 int
 187 OBJ_add_sigid(int signid, int dig_id, int pkey_id)
 188 {
 189         nid_triple *ntr;
 190
 191         if (!sig_app)
 192                 sig_app = sk_nid_triple_new(sig_sk_cmp);
 193         if (!sig_app)
 194                 return 0;
 195         if (!sigx_app)
 196                 sigx_app = sk_nid_triple_new(sigx_cmp);
 197         if (!sigx_app)
 198                 return 0;
 199         ntr = reallocarray(NULL, 3, sizeof(int));
 200         if (!ntr)
 201                 return 0;
 202         ntr->sign_id = signid;
 203         ntr->hash_id = dig_id;
 204         ntr->pkey_id = pkey_id;
 205
 206         if (!sk_nid_triple_push(sig_app, ntr)) {
 207                 free(ntr);
 208                 return 0;
 209         }
 210
 211         if (!sk_nid_triple_push(sigx_app, ntr))
 212                 return 0;
 213
 214         sk_nid_triple_sort(sig_app);
 215         sk_nid_triple_sort(sigx_app);
 216
 217         return 1;
 218 }
 219
 220 static void
 221 sid_free(nid_triple *tt)
 222 {
 223         free(tt);
 224 }
 225
 226 void
 227 OBJ_sigid_free(void)
 228 {
 229         if (sig_app) {
 230                 sk_nid_triple_pop_free(sig_app, sid_free);
 231                 sig_app = NULL;
 232         }
 233         if (sigx_app) {
 234                 sk_nid_triple_free(sigx_app);
 235                 sigx_app = NULL;
 236         }
 237 }