2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include "e_os.h" /* strcasecmp */
11 #include "internal/namemap.h"
12 #include <openssl/lhash.h>
13 #include "crypto/lhash.h" /* openssl_lh_strcasehash */
24 DEFINE_LHASH_OF(NAMENUM_ENTRY
);
31 struct ossl_namemap_st
{
33 unsigned int stored
:1; /* If 1, it's stored in a library context */
36 LHASH_OF(NAMENUM_ENTRY
) *namenum
; /* Name->number mapping */
37 int max_number
; /* Current max number */
42 static unsigned long namenum_hash(const NAMENUM_ENTRY
*n
)
44 return openssl_lh_strcasehash(n
->name
);
47 static int namenum_cmp(const NAMENUM_ENTRY
*a
, const NAMENUM_ENTRY
*b
)
49 return strcasecmp(a
->name
, b
->name
);
52 static void namenum_free(NAMENUM_ENTRY
*n
)
55 OPENSSL_free(n
->name
);
59 /* OPENSSL_CTX_METHOD functions for a namemap stored in a library context */
61 static void *stored_namemap_new(OPENSSL_CTX
*libctx
)
63 OSSL_NAMEMAP
*namemap
= ossl_namemap_new();
71 static void stored_namemap_free(void *vnamemap
)
73 OSSL_NAMEMAP
*namemap
= vnamemap
;
75 /* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
77 ossl_namemap_free(namemap
);
80 static const OPENSSL_CTX_METHOD stored_namemap_method
= {
90 OSSL_NAMEMAP
*ossl_namemap_stored(OPENSSL_CTX
*libctx
)
92 return openssl_ctx_get_data(libctx
, OPENSSL_CTX_NAMEMAP_INDEX
,
93 &stored_namemap_method
);
96 OSSL_NAMEMAP
*ossl_namemap_new(void)
98 OSSL_NAMEMAP
*namemap
;
100 if ((namemap
= OPENSSL_zalloc(sizeof(*namemap
))) != NULL
101 && (namemap
->lock
= CRYPTO_THREAD_lock_new()) != NULL
102 && (namemap
->namenum
=
103 lh_NAMENUM_ENTRY_new(namenum_hash
, namenum_cmp
)) != NULL
)
106 ossl_namemap_free(namemap
);
110 void ossl_namemap_free(OSSL_NAMEMAP
*namemap
)
112 if (namemap
== NULL
|| namemap
->stored
)
115 lh_NAMENUM_ENTRY_doall(namemap
->namenum
, namenum_free
);
116 lh_NAMENUM_ENTRY_free(namemap
->namenum
);
118 CRYPTO_THREAD_lock_free(namemap
->lock
);
119 OPENSSL_free(namemap
);
122 typedef struct doall_names_data_st
{
124 void (*fn
)(const char *name
, void *data
);
128 static void do_name(const NAMENUM_ENTRY
*namenum
, DOALL_NAMES_DATA
*data
)
130 if (namenum
->number
== data
->number
)
131 data
->fn(namenum
->name
, data
->data
);
134 IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY
, DOALL_NAMES_DATA
);
136 void ossl_namemap_doall_names(const OSSL_NAMEMAP
*namemap
, int number
,
137 void (*fn
)(const char *name
, void *data
),
140 DOALL_NAMES_DATA cbdata
;
142 cbdata
.number
= number
;
145 CRYPTO_THREAD_read_lock(namemap
->lock
);
146 lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap
->namenum
, do_name
,
148 CRYPTO_THREAD_unlock(namemap
->lock
);
151 int ossl_namemap_name2num_n(const OSSL_NAMEMAP
*namemap
,
152 const char *name
, size_t name_len
)
154 NAMENUM_ENTRY
*namenum_entry
, namenum_tmpl
;
159 namemap
= ossl_namemap_stored(NULL
);
165 if ((namenum_tmpl
.name
= OPENSSL_strndup(name
, name_len
)) == NULL
)
167 namenum_tmpl
.number
= 0;
168 CRYPTO_THREAD_read_lock(namemap
->lock
);
170 lh_NAMENUM_ENTRY_retrieve(namemap
->namenum
, &namenum_tmpl
);
171 if (namenum_entry
!= NULL
)
172 number
= namenum_entry
->number
;
173 CRYPTO_THREAD_unlock(namemap
->lock
);
174 OPENSSL_free(namenum_tmpl
.name
);
179 int ossl_namemap_name2num(const OSSL_NAMEMAP
*namemap
, const char *name
)
184 return ossl_namemap_name2num_n(namemap
, name
, strlen(name
));
187 struct num2name_data_st
{
188 size_t idx
; /* Countdown */
189 const char *name
; /* Result */
192 static void do_num2name(const char *name
, void *vdata
)
194 struct num2name_data_st
*data
= vdata
;
198 else if (data
->name
== NULL
)
202 const char *ossl_namemap_num2name(const OSSL_NAMEMAP
*namemap
, int number
,
205 struct num2name_data_st data
;
209 ossl_namemap_doall_names(namemap
, number
, do_num2name
, &data
);
213 int ossl_namemap_add_n(OSSL_NAMEMAP
*namemap
, int number
,
214 const char *name
, size_t name_len
)
216 NAMENUM_ENTRY
*namenum
= NULL
;
221 namemap
= ossl_namemap_stored(NULL
);
224 if (name
== NULL
|| name_len
== 0 || namemap
== NULL
)
227 if ((tmp_number
= ossl_namemap_name2num_n(namemap
, name
, name_len
)) != 0)
228 return tmp_number
; /* Pretend success */
230 CRYPTO_THREAD_write_lock(namemap
->lock
);
232 if ((namenum
= OPENSSL_zalloc(sizeof(*namenum
))) == NULL
233 || (namenum
->name
= OPENSSL_strndup(name
, name_len
)) == NULL
)
236 namenum
->number
= tmp_number
=
237 number
!= 0 ? number
: ++namemap
->max_number
;
238 (void)lh_NAMENUM_ENTRY_insert(namemap
->namenum
, namenum
);
240 if (lh_NAMENUM_ENTRY_error(namemap
->namenum
))
243 CRYPTO_THREAD_unlock(namemap
->lock
);
248 namenum_free(namenum
);
250 CRYPTO_THREAD_unlock(namemap
->lock
);
254 int ossl_namemap_add(OSSL_NAMEMAP
*namemap
, int number
, const char *name
)
259 return ossl_namemap_add_n(namemap
, number
, name
, strlen(name
));