mirror of https://github.com/openssl/openssl
440 lines
12 KiB
C
440 lines
12 KiB
C
/*
|
|
* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include "e_os.h" /* strcasecmp */
|
|
#include "internal/namemap.h"
|
|
#include <openssl/lhash.h>
|
|
#include "crypto/lhash.h" /* openssl_lh_strcasehash */
|
|
#include "internal/tsan_assist.h"
|
|
|
|
/*-
|
|
* The namenum entry
|
|
* =================
|
|
*/
|
|
typedef struct {
|
|
char *name;
|
|
int number;
|
|
} NAMENUM_ENTRY;
|
|
|
|
DEFINE_LHASH_OF(NAMENUM_ENTRY);
|
|
|
|
/*-
|
|
* The namemap itself
|
|
* ==================
|
|
*/
|
|
|
|
struct ossl_namemap_st {
|
|
/* Flags */
|
|
unsigned int stored:1; /* If 1, it's stored in a library context */
|
|
|
|
CRYPTO_RWLOCK *lock;
|
|
LHASH_OF(NAMENUM_ENTRY) *namenum; /* Name->number mapping */
|
|
|
|
#ifdef tsan_ld_acq
|
|
TSAN_QUALIFIER int max_number; /* Current max number TSAN version */
|
|
#else
|
|
int max_number; /* Current max number plain version */
|
|
#endif
|
|
};
|
|
|
|
/* LHASH callbacks */
|
|
|
|
static unsigned long namenum_hash(const NAMENUM_ENTRY *n)
|
|
{
|
|
return openssl_lh_strcasehash(n->name);
|
|
}
|
|
|
|
static int namenum_cmp(const NAMENUM_ENTRY *a, const NAMENUM_ENTRY *b)
|
|
{
|
|
return strcasecmp(a->name, b->name);
|
|
}
|
|
|
|
static void namenum_free(NAMENUM_ENTRY *n)
|
|
{
|
|
if (n != NULL)
|
|
OPENSSL_free(n->name);
|
|
OPENSSL_free(n);
|
|
}
|
|
|
|
/* OSSL_LIB_CTX_METHOD functions for a namemap stored in a library context */
|
|
|
|
static void *stored_namemap_new(OSSL_LIB_CTX *libctx)
|
|
{
|
|
OSSL_NAMEMAP *namemap = ossl_namemap_new();
|
|
|
|
if (namemap != NULL)
|
|
namemap->stored = 1;
|
|
|
|
return namemap;
|
|
}
|
|
|
|
static void stored_namemap_free(void *vnamemap)
|
|
{
|
|
OSSL_NAMEMAP *namemap = vnamemap;
|
|
|
|
if (namemap != NULL) {
|
|
/* Pretend it isn't stored, or ossl_namemap_free() will do nothing */
|
|
namemap->stored = 0;
|
|
ossl_namemap_free(namemap);
|
|
}
|
|
}
|
|
|
|
static const OSSL_LIB_CTX_METHOD stored_namemap_method = {
|
|
stored_namemap_new,
|
|
stored_namemap_free,
|
|
};
|
|
|
|
/*-
|
|
* API functions
|
|
* =============
|
|
*/
|
|
|
|
int ossl_namemap_empty(OSSL_NAMEMAP *namemap)
|
|
{
|
|
#ifdef tsan_ld_acq
|
|
/* Have TSAN support */
|
|
return namemap == NULL || tsan_load(&namemap->max_number) == 0;
|
|
#else
|
|
/* No TSAN support */
|
|
int rv;
|
|
|
|
if (namemap == NULL)
|
|
return 1;
|
|
|
|
CRYPTO_THREAD_read_lock(namemap->lock);
|
|
rv = namemap->max_number == 0;
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
return rv;
|
|
#endif
|
|
}
|
|
|
|
typedef struct doall_names_data_st {
|
|
int number;
|
|
void (*fn)(const char *name, void *data);
|
|
void *data;
|
|
} DOALL_NAMES_DATA;
|
|
|
|
static void do_name(const NAMENUM_ENTRY *namenum, DOALL_NAMES_DATA *data)
|
|
{
|
|
if (namenum->number == data->number)
|
|
data->fn(namenum->name, data->data);
|
|
}
|
|
|
|
IMPLEMENT_LHASH_DOALL_ARG_CONST(NAMENUM_ENTRY, DOALL_NAMES_DATA);
|
|
|
|
void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
|
|
void (*fn)(const char *name, void *data),
|
|
void *data)
|
|
{
|
|
DOALL_NAMES_DATA cbdata;
|
|
|
|
cbdata.number = number;
|
|
cbdata.fn = fn;
|
|
cbdata.data = data;
|
|
CRYPTO_THREAD_read_lock(namemap->lock);
|
|
lh_NAMENUM_ENTRY_doall_DOALL_NAMES_DATA(namemap->namenum, do_name,
|
|
&cbdata);
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
}
|
|
|
|
static int namemap_name2num_n(const OSSL_NAMEMAP *namemap,
|
|
const char *name, size_t name_len)
|
|
{
|
|
NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
|
|
|
|
if ((namenum_tmpl.name = OPENSSL_strndup(name, name_len)) == NULL)
|
|
return 0;
|
|
namenum_tmpl.number = 0;
|
|
namenum_entry =
|
|
lh_NAMENUM_ENTRY_retrieve(namemap->namenum, &namenum_tmpl);
|
|
OPENSSL_free(namenum_tmpl.name);
|
|
return namenum_entry != NULL ? namenum_entry->number : 0;
|
|
}
|
|
|
|
int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
|
|
const char *name, size_t name_len)
|
|
{
|
|
int number;
|
|
|
|
#ifndef FIPS_MODULE
|
|
if (namemap == NULL)
|
|
namemap = ossl_namemap_stored(NULL);
|
|
#endif
|
|
|
|
if (namemap == NULL)
|
|
return 0;
|
|
|
|
CRYPTO_THREAD_read_lock(namemap->lock);
|
|
number = namemap_name2num_n(namemap, name, name_len);
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
|
|
return number;
|
|
}
|
|
|
|
int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
|
|
{
|
|
if (name == NULL)
|
|
return 0;
|
|
|
|
return ossl_namemap_name2num_n(namemap, name, strlen(name));
|
|
}
|
|
|
|
struct num2name_data_st {
|
|
size_t idx; /* Countdown */
|
|
const char *name; /* Result */
|
|
};
|
|
|
|
static void do_num2name(const char *name, void *vdata)
|
|
{
|
|
struct num2name_data_st *data = vdata;
|
|
|
|
if (data->idx > 0)
|
|
data->idx--;
|
|
else if (data->name == NULL)
|
|
data->name = name;
|
|
}
|
|
|
|
const char *ossl_namemap_num2name(const OSSL_NAMEMAP *namemap, int number,
|
|
size_t idx)
|
|
{
|
|
struct num2name_data_st data;
|
|
|
|
data.idx = idx;
|
|
data.name = NULL;
|
|
ossl_namemap_doall_names(namemap, number, do_num2name, &data);
|
|
return data.name;
|
|
}
|
|
|
|
static int namemap_add_name_n(OSSL_NAMEMAP *namemap, int number,
|
|
const char *name, size_t name_len)
|
|
{
|
|
NAMENUM_ENTRY *namenum = NULL;
|
|
int tmp_number;
|
|
|
|
/* If it already exists, we don't add it */
|
|
if ((tmp_number = namemap_name2num_n(namemap, name, name_len)) != 0)
|
|
return tmp_number;
|
|
|
|
if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
|
|
|| (namenum->name = OPENSSL_strndup(name, name_len)) == NULL)
|
|
goto err;
|
|
|
|
namenum->number =
|
|
number != 0 ? number : 1 + tsan_counter(&namemap->max_number);
|
|
(void)lh_NAMENUM_ENTRY_insert(namemap->namenum, namenum);
|
|
|
|
if (lh_NAMENUM_ENTRY_error(namemap->namenum))
|
|
goto err;
|
|
return namenum->number;
|
|
|
|
err:
|
|
namenum_free(namenum);
|
|
return 0;
|
|
}
|
|
|
|
int ossl_namemap_add_name_n(OSSL_NAMEMAP *namemap, int number,
|
|
const char *name, size_t name_len)
|
|
{
|
|
int tmp_number;
|
|
|
|
#ifndef FIPS_MODULE
|
|
if (namemap == NULL)
|
|
namemap = ossl_namemap_stored(NULL);
|
|
#endif
|
|
|
|
if (name == NULL || name_len == 0 || namemap == NULL)
|
|
return 0;
|
|
|
|
CRYPTO_THREAD_write_lock(namemap->lock);
|
|
tmp_number = namemap_add_name_n(namemap, number, name, name_len);
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
return tmp_number;
|
|
}
|
|
|
|
int ossl_namemap_add_name(OSSL_NAMEMAP *namemap, int number, const char *name)
|
|
{
|
|
if (name == NULL)
|
|
return 0;
|
|
|
|
return ossl_namemap_add_name_n(namemap, number, name, strlen(name));
|
|
}
|
|
|
|
int ossl_namemap_add_names(OSSL_NAMEMAP *namemap, int number,
|
|
const char *names, const char separator)
|
|
{
|
|
const char *p, *q;
|
|
size_t l;
|
|
|
|
/* Check that we have a namemap */
|
|
if (!ossl_assert(namemap != NULL)) {
|
|
ERR_raise(ERR_LIB_CRYPTO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return 0;
|
|
}
|
|
|
|
CRYPTO_THREAD_write_lock(namemap->lock);
|
|
/*
|
|
* Check that no name is an empty string, and that all names have at
|
|
* most one numeric identity together.
|
|
*/
|
|
for (p = names; *p != '\0'; p = (q == NULL ? p + l : q + 1)) {
|
|
int this_number;
|
|
|
|
if ((q = strchr(p, separator)) == NULL)
|
|
l = strlen(p); /* offset to \0 */
|
|
else
|
|
l = q - p; /* offset to the next separator */
|
|
|
|
this_number = namemap_name2num_n(namemap, p, l);
|
|
|
|
if (*p == '\0' || *p == separator) {
|
|
ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_BAD_ALGORITHM_NAME);
|
|
goto err;
|
|
}
|
|
if (number == 0) {
|
|
number = this_number;
|
|
} else if (this_number != 0 && this_number != number) {
|
|
ERR_raise_data(ERR_LIB_CRYPTO, CRYPTO_R_CONFLICTING_NAMES,
|
|
"\"%.*s\" has an existing different identity %d (from \"%s\")",
|
|
l, p, this_number, names);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/* Now that we have checked, register all names */
|
|
for (p = names; *p != '\0'; p = (q == NULL ? p + l : q + 1)) {
|
|
int this_number;
|
|
|
|
if ((q = strchr(p, separator)) == NULL)
|
|
l = strlen(p); /* offset to \0 */
|
|
else
|
|
l = q - p; /* offset to the next separator */
|
|
|
|
this_number = namemap_add_name_n(namemap, number, p, l);
|
|
if (number == 0) {
|
|
number = this_number;
|
|
} else if (this_number != number) {
|
|
ERR_raise_data(ERR_LIB_CRYPTO, ERR_R_INTERNAL_ERROR,
|
|
"Got number %d when expecting %d",
|
|
this_number, number);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
return number;
|
|
|
|
err:
|
|
CRYPTO_THREAD_unlock(namemap->lock);
|
|
return 0;
|
|
}
|
|
|
|
/*-
|
|
* Pre-population
|
|
* ==============
|
|
*/
|
|
|
|
#ifndef FIPS_MODULE
|
|
#include <openssl/evp.h>
|
|
|
|
/* Creates an initial namemap with names found in the legacy method db */
|
|
static void get_legacy_evp_names(const char *main_name, const char *alias,
|
|
void *arg)
|
|
{
|
|
int main_id = ossl_namemap_add_name(arg, 0, main_name);
|
|
|
|
/*
|
|
* We could check that the returned value is the same as main_id,
|
|
* but since this is a void function, there's no sane way to report
|
|
* the error. The best we can do is trust ourselve to keep the legacy
|
|
* method database conflict free.
|
|
*
|
|
* This registers any alias with the same number as the main name.
|
|
* Should it be that the current |on| *has* the main name, this is
|
|
* simply a no-op.
|
|
*/
|
|
if (alias != NULL) {
|
|
(void)ossl_namemap_add_name(arg, main_id, alias);
|
|
}
|
|
}
|
|
|
|
static void get_legacy_cipher_names(const OBJ_NAME *on, void *arg)
|
|
{
|
|
const EVP_CIPHER *cipher = (void *)OBJ_NAME_get(on->name, on->type);
|
|
|
|
get_legacy_evp_names(EVP_CIPHER_name(cipher), on->name, arg);
|
|
}
|
|
|
|
static void get_legacy_md_names(const OBJ_NAME *on, void *arg)
|
|
{
|
|
const EVP_MD *md = (void *)OBJ_NAME_get(on->name, on->type);
|
|
/* We don't want the pkey_type names, so we need some extra care */
|
|
int snid, lnid;
|
|
|
|
snid = OBJ_sn2nid(on->name);
|
|
lnid = OBJ_ln2nid(on->name);
|
|
if (snid != EVP_MD_pkey_type(md) && lnid != EVP_MD_pkey_type(md))
|
|
get_legacy_evp_names(EVP_MD_name(md), on->name, arg);
|
|
else
|
|
get_legacy_evp_names(EVP_MD_name(md), NULL, arg);
|
|
}
|
|
#endif
|
|
|
|
/*-
|
|
* Constructors / destructors
|
|
* ==========================
|
|
*/
|
|
|
|
OSSL_NAMEMAP *ossl_namemap_stored(OSSL_LIB_CTX *libctx)
|
|
{
|
|
OSSL_NAMEMAP *namemap =
|
|
ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_NAMEMAP_INDEX,
|
|
&stored_namemap_method);
|
|
|
|
#ifndef FIPS_MODULE
|
|
if (namemap != NULL && ossl_namemap_empty(namemap)) {
|
|
/* Before pilfering, we make sure the legacy database is populated */
|
|
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
|
|
| OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
|
|
|
|
OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH,
|
|
get_legacy_cipher_names, namemap);
|
|
OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH,
|
|
get_legacy_md_names, namemap);
|
|
}
|
|
#endif
|
|
|
|
return namemap;
|
|
}
|
|
|
|
OSSL_NAMEMAP *ossl_namemap_new(void)
|
|
{
|
|
OSSL_NAMEMAP *namemap;
|
|
|
|
if ((namemap = OPENSSL_zalloc(sizeof(*namemap))) != NULL
|
|
&& (namemap->lock = CRYPTO_THREAD_lock_new()) != NULL
|
|
&& (namemap->namenum =
|
|
lh_NAMENUM_ENTRY_new(namenum_hash, namenum_cmp)) != NULL)
|
|
return namemap;
|
|
|
|
ossl_namemap_free(namemap);
|
|
return NULL;
|
|
}
|
|
|
|
void ossl_namemap_free(OSSL_NAMEMAP *namemap)
|
|
{
|
|
if (namemap == NULL || namemap->stored)
|
|
return;
|
|
|
|
lh_NAMENUM_ENTRY_doall(namemap->namenum, namenum_free);
|
|
lh_NAMENUM_ENTRY_free(namemap->namenum);
|
|
|
|
CRYPTO_THREAD_lock_free(namemap->lock);
|
|
OPENSSL_free(namemap);
|
|
}
|