2019-05-04 18:55:32 +08:00
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/*
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* Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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2019-06-05 14:59:13 +08:00
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#include "e_os.h" /* strcasecmp */
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2019-05-04 18:55:32 +08:00
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#include "internal/namemap.h"
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#include <openssl/lhash.h>
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2019-06-05 14:59:13 +08:00
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#include "internal/lhash.h" /* openssl_lh_strcasehash */
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2019-05-04 18:55:32 +08:00
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2019-05-23 09:18:04 +08:00
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/*-
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* The namenum entry
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* =================
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*/
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2019-05-04 18:55:32 +08:00
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typedef struct {
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char *name;
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2019-05-04 18:55:32 +08:00
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int number;
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2019-05-23 09:18:04 +08:00
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} NAMENUM_ENTRY;
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2019-05-04 18:55:32 +08:00
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2019-05-23 09:18:04 +08:00
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DEFINE_LHASH_OF(NAMENUM_ENTRY);
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2019-05-04 18:55:32 +08:00
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2019-05-23 09:18:04 +08:00
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/*-
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* The namemap itself
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* ==================
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*/
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2019-05-04 18:55:32 +08:00
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struct ossl_namemap_st {
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/* Flags */
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unsigned int stored:1; /* If 1, it's stored in a library context */
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CRYPTO_RWLOCK *lock;
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2019-05-23 09:18:04 +08:00
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LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
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int max_number; /* Current max number */
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2019-05-04 18:55:32 +08:00
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};
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/* LHASH callbacks */
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2019-05-23 09:18:04 +08:00
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static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
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2019-05-04 18:55:32 +08:00
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{
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return openssl_lh_strcasehash(n->name);
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2019-05-04 18:55:32 +08:00
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}
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2019-05-23 09:18:04 +08:00
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static int namenum_cmp(const NAMENUM_ENTRY *a, const NAMENUM_ENTRY *b)
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{
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return strcasecmp(a->name, b->name);
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2019-05-04 18:55:32 +08:00
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}
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2019-05-23 09:18:04 +08:00
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static void namenum_free(NAMENUM_ENTRY *n)
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{
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if (n != NULL)
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OPENSSL_free(n->name);
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2019-05-04 18:55:32 +08:00
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OPENSSL_free(n);
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}
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/* OPENSSL_CTX_METHOD functions for a namemap stored in a library context */
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static void *stored_namemap_new(OPENSSL_CTX *libctx)
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{
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OSSL_NAMEMAP *namemap = ossl_namemap_new();
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if (namemap != NULL)
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namemap->stored = 1;
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return namemap;
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}
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static void stored_namemap_free(void *vnamemap)
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{
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OSSL_NAMEMAP *namemap = vnamemap;
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/* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
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namemap->stored = 0;
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ossl_namemap_free(namemap);
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}
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static const OPENSSL_CTX_METHOD stored_namemap_method = {
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stored_namemap_new,
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stored_namemap_free,
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};
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2019-05-23 09:18:04 +08:00
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/*-
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* API functions
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* =============
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*/
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2019-05-04 18:55:32 +08:00
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OSSL_NAMEMAP *ossl_namemap_stored(OPENSSL_CTX *libctx)
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{
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return openssl_ctx_get_data(libctx, OPENSSL_CTX_NAMEMAP_INDEX,
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&stored_namemap_method);
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}
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OSSL_NAMEMAP *ossl_namemap_new(void)
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{
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OSSL_NAMEMAP *namemap;
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if ((namemap = OPENSSL_zalloc(sizeof(*namemap))) != NULL
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&& (namemap->lock = CRYPTO_THREAD_lock_new()) != NULL
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&& (namemap->namenum =
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lh_NAMENUM_ENTRY_new(namenum_hash, namenum_cmp)) != NULL)
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return namemap;
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ossl_namemap_free(namemap);
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return NULL;
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}
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void ossl_namemap_free(OSSL_NAMEMAP *namemap)
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{
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if (namemap == NULL || namemap->stored)
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return;
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2019-05-23 09:18:04 +08:00
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lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
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lh_NAMENUM_ENTRY_free(namemap->namenum);
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2019-05-04 18:55:32 +08:00
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CRYPTO_THREAD_lock_free(namemap->lock);
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OPENSSL_free(namemap);
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}
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2019-05-23 09:18:04 +08:00
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typedef struct doall_names_data_st {
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int number;
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void (*fn)(const char *name, void *data);
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void *data;
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} DOALL_NAMES_DATA;
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2019-05-23 09:18:04 +08:00
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static void do_name(const NAMENUM_ENTRY *namenum, DOALL_NAMES_DATA *data)
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{
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if (namenum->number == data->number)
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data->fn(namenum->name, data->data);
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}
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2019-05-04 18:55:32 +08:00
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2019-05-23 09:18:04 +08:00
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IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
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2019-05-23 09:18:04 +08:00
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void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
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void (*fn)(const char *name, void *data),
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void *data)
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{
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DOALL_NAMES_DATA cbdata;
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cbdata.number = number;
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cbdata.fn = fn;
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cbdata.data = data;
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CRYPTO_THREAD_read_lock(namemap->lock);
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lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap->namenum, do_name,
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&cbdata);
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CRYPTO_THREAD_unlock(namemap->lock);
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}
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2019-05-23 09:18:04 +08:00
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int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
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{
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NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
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int number = 0;
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2019-05-04 18:55:32 +08:00
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#ifndef FIPS_MODE
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if (namemap == NULL)
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namemap = ossl_namemap_stored(NULL);
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#endif
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if (namemap == NULL)
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return 0;
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2019-05-23 09:18:04 +08:00
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namenum_tmpl.name = (char *)name;
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namenum_tmpl.number = 0;
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CRYPTO_THREAD_read_lock(namemap->lock);
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namenum_entry =
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lh_NAMENUM_ENTRY_retrieve(namemap->namenum, &namenum_tmpl);
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if (namenum_entry != NULL)
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number = namenum_entry->number;
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2019-05-04 18:55:32 +08:00
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CRYPTO_THREAD_unlock(namemap->lock);
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2019-05-23 09:18:04 +08:00
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return number;
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}
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2019-05-23 09:18:04 +08:00
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int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
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{
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NAMENUM_ENTRY *namenum = NULL;
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int tmp_number;
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2019-05-04 18:55:32 +08:00
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#ifndef FIPS_MODE
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if (namemap == NULL)
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namemap = ossl_namemap_stored(NULL);
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#endif
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if (name == NULL || namemap == NULL)
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return 0;
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2019-05-23 09:18:04 +08:00
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if ((tmp_number = ossl_namemap_name2num(namemap, name)) != 0)
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return tmp_number; /* Pretend success */
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2019-05-04 18:55:32 +08:00
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CRYPTO_THREAD_write_lock(namemap->lock);
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2019-05-23 09:18:04 +08:00
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if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
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|| (namenum->name = OPENSSL_strdup(name)) == NULL)
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2019-05-04 18:55:32 +08:00
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goto err;
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2019-05-23 09:18:04 +08:00
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namenum->number = tmp_number =
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number != 0 ? number : ++namemap->max_number;
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(void)lh_NAMENUM_ENTRY_insert(namemap->namenum, namenum);
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if (lh_NAMENUM_ENTRY_error(namemap->namenum))
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2019-05-04 18:55:32 +08:00
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goto err;
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CRYPTO_THREAD_unlock(namemap->lock);
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2019-05-23 09:18:04 +08:00
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return tmp_number;
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2019-05-04 18:55:32 +08:00
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err:
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2019-05-23 09:18:04 +08:00
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namenum_free(namenum);
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CRYPTO_THREAD_unlock(namemap->lock);
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2019-05-04 18:55:32 +08:00
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return 0;
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}
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