1/*
2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <openssl/objects.h>
11#include "obj_xref.h"
12#include "internal/nelem.h"
13#include <openssl/err.h>
14
15static STACK_OF(nid_triple) *sig_app, *sigx_app;
16
17static int sig_cmp(const nid_triple *a, const nid_triple *b)
18{
19    return a->sign_id - b->sign_id;
20}
21
22DECLARE_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
23IMPLEMENT_OBJ_BSEARCH_CMP_FN(nid_triple, nid_triple, sig);
24
25static int sig_sk_cmp(const nid_triple *const *a, const nid_triple *const *b)
26{
27    return (*a)->sign_id - (*b)->sign_id;
28}
29
30DECLARE_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
31
32static int sigx_cmp(const nid_triple *const *a, const nid_triple *const *b)
33{
34    int ret;
35    ret = (*a)->hash_id - (*b)->hash_id;
36    if (ret)
37        return ret;
38    return (*a)->pkey_id - (*b)->pkey_id;
39}
40
41IMPLEMENT_OBJ_BSEARCH_CMP_FN(const nid_triple *, const nid_triple *, sigx);
42
43int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
44{
45    nid_triple tmp;
46    const nid_triple *rv = NULL;
47    tmp.sign_id = signid;
48
49    if (sig_app != NULL) {
50        int idx = sk_nid_triple_find(sig_app, &tmp);
51        rv = sk_nid_triple_value(sig_app, idx);
52    }
53#ifndef OBJ_XREF_TEST2
54    if (rv == NULL) {
55        rv = OBJ_bsearch_sig(&tmp, sigoid_srt, OSSL_NELEM(sigoid_srt));
56    }
57#endif
58    if (rv == NULL)
59        return 0;
60    if (pdig_nid)
61        *pdig_nid = rv->hash_id;
62    if (ppkey_nid)
63        *ppkey_nid = rv->pkey_id;
64    return 1;
65}
66
67int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
68{
69    nid_triple tmp;
70    const nid_triple *t = &tmp;
71    const nid_triple **rv = NULL;
72
73    tmp.hash_id = dig_nid;
74    tmp.pkey_id = pkey_nid;
75
76    if (sigx_app) {
77        int idx = sk_nid_triple_find(sigx_app, &tmp);
78        if (idx >= 0) {
79            t = sk_nid_triple_value(sigx_app, idx);
80            rv = &t;
81        }
82    }
83#ifndef OBJ_XREF_TEST2
84    if (rv == NULL) {
85        rv = OBJ_bsearch_sigx(&t, sigoid_srt_xref, OSSL_NELEM(sigoid_srt_xref));
86    }
87#endif
88    if (rv == NULL)
89        return 0;
90    if (psignid)
91        *psignid = (*rv)->sign_id;
92    return 1;
93}
94
95int OBJ_add_sigid(int signid, int dig_id, int pkey_id)
96{
97    nid_triple *ntr;
98    if (sig_app == NULL)
99        sig_app = sk_nid_triple_new(sig_sk_cmp);
100    if (sig_app == NULL)
101        return 0;
102    if (sigx_app == NULL)
103        sigx_app = sk_nid_triple_new(sigx_cmp);
104    if (sigx_app == NULL)
105        return 0;
106    if ((ntr = OPENSSL_malloc(sizeof(*ntr))) == NULL) {
107        OBJerr(OBJ_F_OBJ_ADD_SIGID, ERR_R_MALLOC_FAILURE);
108        return 0;
109    }
110    ntr->sign_id = signid;
111    ntr->hash_id = dig_id;
112    ntr->pkey_id = pkey_id;
113
114    if (!sk_nid_triple_push(sig_app, ntr)) {
115        OPENSSL_free(ntr);
116        return 0;
117    }
118
119    if (!sk_nid_triple_push(sigx_app, ntr))
120        return 0;
121
122    sk_nid_triple_sort(sig_app);
123    sk_nid_triple_sort(sigx_app);
124
125    return 1;
126}
127
128static void sid_free(nid_triple *tt)
129{
130    OPENSSL_free(tt);
131}
132
133void OBJ_sigid_free(void)
134{
135    sk_nid_triple_pop_free(sig_app, sid_free);
136    sig_app = NULL;
137    sk_nid_triple_free(sigx_app);
138    sigx_app = NULL;
139}
140