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f844f9eb44
This macro is used to determine if certain pieces of code should become part of the FIPS module or not. The old name was confusing. Fixes #11538 Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/11539)
410 lines
11 KiB
C
410 lines
11 KiB
C
/*
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* Copyright 2019-2020 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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#include "e_os.h" /* strcasecmp */
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#include "internal/namemap.h"
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#include <openssl/lhash.h>
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#include "crypto/lhash.h" /* openssl_lh_strcasehash */
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/*-
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* The namenum entry
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* =================
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*/
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typedef struct {
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char *name;
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int number;
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} NAMENUM_ENTRY;
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DEFINE_LHASH_OF(NAMENUM_ENTRY);
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/*-
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* The namemap itself
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* ==================
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*/
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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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LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
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int max_number; /* Current max number */
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};
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/* LHASH callbacks */
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static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
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{
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return openssl_lh_strcasehash(n->name);
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}
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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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}
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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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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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if (namemap != NULL) {
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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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}
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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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/*-
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* API functions
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* =============
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*/
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int ossl_namemap_empty(OSSL_NAMEMAP *namemap)
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{
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int rv = 0;
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CRYPTO_THREAD_read_lock(namemap->lock);
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if (namemap->max_number == 0)
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rv = 1;
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CRYPTO_THREAD_unlock(namemap->lock);
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return rv;
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}
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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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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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IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
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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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int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
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const char *name, size_t name_len)
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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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#ifndef FIPS_MODULE
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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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if ((namenum_tmpl.name = OPENSSL_strndup(name, name_len)) == NULL)
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return 0;
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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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CRYPTO_THREAD_unlock(namemap->lock);
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OPENSSL_free(namenum_tmpl.name);
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return number;
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}
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int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
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{
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if (name == NULL)
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return 0;
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return ossl_namemap_name2num_n(namemap, name, strlen(name));
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}
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struct num2name_data_st {
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size_t idx; /* Countdown */
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const char *name; /* Result */
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};
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static void do_num2name(const char *name, void *vdata)
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{
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struct num2name_data_st *data = vdata;
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if (data->idx > 0)
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data->idx--;
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else if (data->name == NULL)
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data->name = name;
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}
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const char *ossl_namemap_num2name(const OSSL_NAMEMAP *namemap, int number,
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size_t idx)
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{
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struct num2name_data_st data;
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data.idx = idx;
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data.name = NULL;
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ossl_namemap_doall_names(namemap, number, do_num2name, &data);
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return data.name;
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}
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int ossl_namemap_add_name_n(OSSL_NAMEMAP *namemap, int number,
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const char *name, size_t name_len)
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{
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NAMENUM_ENTRY *namenum = NULL;
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int tmp_number;
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#ifndef FIPS_MODULE
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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 || name_len == 0 || namemap == NULL)
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return 0;
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if ((tmp_number = ossl_namemap_name2num_n(namemap, name, name_len)) != 0)
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return tmp_number; /* Pretend success */
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CRYPTO_THREAD_write_lock(namemap->lock);
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if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
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|| (namenum->name = OPENSSL_strndup(name, name_len)) == NULL)
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goto err;
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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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goto err;
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CRYPTO_THREAD_unlock(namemap->lock);
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return tmp_number;
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err:
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namenum_free(namenum);
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CRYPTO_THREAD_unlock(namemap->lock);
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return 0;
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}
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int ossl_namemap_add_name(OSSL_NAMEMAP *namemap, int number, const char *name)
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{
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if (name == NULL)
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return 0;
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return ossl_namemap_add_name_n(namemap, number, name, strlen(name));
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}
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int ossl_namemap_add_names(OSSL_NAMEMAP *namemap, int number,
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const char *names, const char separator)
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{
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const char *p, *q;
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size_t l;
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/* Check that we have a namemap */
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if (!ossl_assert(namemap != NULL)) {
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ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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/*
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* Check that no name is an empty string, and that all names have at
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* most one numeric identity together.
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*/
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for (p = names; *p != '\0'; p = (q == NULL ? p + l : q + 1)) {
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int this_number;
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if ((q = strchr(p, separator)) == NULL)
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l = strlen(p); /* offset to \0 */
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else
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l = q - p; /* offset to the next separator */
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this_number = ossl_namemap_name2num_n(namemap, p, l);
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if (*p == '\0' || *p == separator) {
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ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_BAD_ALGORITHM_NAME);
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return 0;
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}
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if (number == 0) {
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number = this_number;
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} else if (this_number != 0 && this_number != number) {
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ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_CONFLICTING_NAMES,
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"\"%.*s\" has an existing different identity %d (from \"%s\")",
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l, p, this_number, names);
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return 0;
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}
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}
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/* Now that we have checked, register all names */
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for (p = names; *p != '\0'; p = (q == NULL ? p + l : q + 1)) {
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int this_number;
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if ((q = strchr(p, separator)) == NULL)
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l = strlen(p); /* offset to \0 */
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else
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l = q - p; /* offset to the next separator */
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this_number = ossl_namemap_add_name_n(namemap, number, p, l);
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if (number == 0) {
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number = this_number;
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} else if (this_number != number) {
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ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR,
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"Got number %d when expecting %d",
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this_number, number);
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return 0;
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}
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}
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return number;
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}
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/*-
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* Pre-population
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* ==============
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*/
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#ifndef FIPS_MODULE
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#include <openssl/evp.h>
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/* Creates an initial namemap with names found in the legacy method db */
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static void get_legacy_evp_names(const char *main_name, const char *alias,
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void *arg)
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{
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int main_id = ossl_namemap_add_name(arg, 0, main_name);
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/*
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* We could check that the returned value is the same as main_id,
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* but since this is a void function, there's no sane way to report
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* the error. The best we can do is trust ourselve to keep the legacy
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* method database conflict free.
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*
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* This registers any alias with the same number as the main name.
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* Should it be that the current |on| *has* the main name, this is
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* simply a no-op.
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*/
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if (alias != NULL) {
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(void)ossl_namemap_add_name(arg, main_id, alias);
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}
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}
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static void get_legacy_cipher_names(const OBJ_NAME *on, void *arg)
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{
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const EVP_CIPHER *cipher = (void *)OBJ_NAME_get(on->name, on->type);
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get_legacy_evp_names(EVP_CIPHER_name(cipher), on->name, arg);
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}
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static void get_legacy_md_names(const OBJ_NAME *on, void *arg)
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{
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const EVP_MD *md = (void *)OBJ_NAME_get(on->name, on->type);
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/* We don't want the pkey_type names, so we need some extra care */
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int snid, lnid;
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snid = OBJ_sn2nid(on->name);
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lnid = OBJ_ln2nid(on->name);
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if (snid != EVP_MD_pkey_type(md) && lnid != EVP_MD_pkey_type(md))
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get_legacy_evp_names(EVP_MD_name(md), on->name, arg);
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else
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get_legacy_evp_names(EVP_MD_name(md), NULL, arg);
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}
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#endif
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/*-
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* Constructors / destructors
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* ==========================
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*/
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OSSL_NAMEMAP *ossl_namemap_stored(OPENSSL_CTX *libctx)
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{
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OSSL_NAMEMAP *namemap =
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openssl_ctx_get_data(libctx, OPENSSL_CTX_NAMEMAP_INDEX,
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&stored_namemap_method);
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#ifndef FIPS_MODULE
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if (namemap != NULL && ossl_namemap_empty(namemap)) {
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/* Before pilfering, we make sure the legacy database is populated */
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OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
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| OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
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OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH,
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get_legacy_cipher_names, namemap);
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OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH,
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get_legacy_md_names, namemap);
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}
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#endif
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return namemap;
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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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lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
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lh_NAMENUM_ENTRY_free(namemap->namenum);
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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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