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Replumbing: make it possible for providers to specify multiple names

Browse Source 
This modifies the treatment of algorithm name strings to allow
multiple names separated with colons.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/8985)
This commit is contained in:
Richard Levitte 2019-05-23 03:36:21 +02:00
parent e7c27a6c37
commit 695d195bbb
10 changed files with 150 additions and 32 deletions
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2
crypto/core_algorithm.c
View File

@ -44,7 +44,7 @@ static int algorithm_do_this(OSSL_PROVIDER *provider, void *cbdata)
break;
ok = 1; /* As long as we've found *something* */
while (map->algorithm_name != NULL) {
while (map->algorithm_names != NULL) {
const OSSL_ALGORITHM *thismap = map++;
data->fn(provider, thismap, no_store, data->data);

6
crypto/core_fetch.c
View File

@ -31,7 +31,7 @@ static void ossl_method_construct_this(OSSL_PROVIDER *provider,
struct construct_data_st *data = cbdata;
void *method = NULL;
if ((method = data->mcm->construct(algo->algorithm_name,
if ((method = data->mcm->construct(algo->algorithm_names,
algo->implementation, provider,
data->mcm_data)) == NULL)
return;
@ -53,12 +53,12 @@ static void ossl_method_construct_this(OSSL_PROVIDER *provider,
* add to the global store
*/
data->mcm->put(data->libctx, NULL, method, provider,
data->operation_id, algo->algorithm_name,
data->operation_id, algo->algorithm_names,
algo->property_definition, data->mcm_data);
}
data->mcm->put(data->libctx, data->store, method, provider,
data->operation_id, algo->algorithm_name,
data->operation_id, algo->algorithm_names,
algo->property_definition, data->mcm_data);
/* refcnt-- because we're dropping the reference */

32
crypto/core_namemap.c
View File

@ -148,7 +148,8 @@ void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
CRYPTO_THREAD_unlock(namemap->lock);
}
int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
const char *name, size_t name_len)
{
NAMENUM_ENTRY *namenum_entry, namenum_tmpl;
int number = 0;
@ -161,7 +162,8 @@ int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
if (namemap == NULL)
return 0;
namenum_tmpl.name = (char *)name;
if ((namenum_tmpl.name = OPENSSL_strndup(name, name_len)) == NULL)
return 0;
namenum_tmpl.number = 0;
CRYPTO_THREAD_read_lock(namemap->lock);
namenum_entry =
@ -169,10 +171,19 @@ int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name)
if (namenum_entry != NULL)
number = namenum_entry->number;
CRYPTO_THREAD_unlock(namemap->lock);
OPENSSL_free(namenum_tmpl.name);
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 */
@ -199,7 +210,8 @@ const char *ossl_namemap_num2name(const OSSL_NAMEMAP *namemap, int number,
return data.name;
}
int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
int ossl_namemap_add_n(OSSL_NAMEMAP *namemap, int number,
const char *name, size_t name_len)
{
NAMENUM_ENTRY *namenum = NULL;
int tmp_number;
@ -209,16 +221,16 @@ int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
namemap = ossl_namemap_stored(NULL);
#endif
if (name == NULL || namemap == NULL)
if (name == NULL || name_len == 0 || namemap == NULL)
return 0;
if ((tmp_number = ossl_namemap_name2num(namemap, name)) != 0)
if ((tmp_number = ossl_namemap_name2num_n(namemap, name, name_len)) != 0)
return tmp_number; /* Pretend success */
CRYPTO_THREAD_write_lock(namemap->lock);
if ((namenum = OPENSSL_zalloc(sizeof(*namenum))) == NULL
|| (namenum->name = OPENSSL_strdup(name)) == NULL)
|| (namenum->name = OPENSSL_strndup(name, name_len)) == NULL)
goto err;
namenum->number = tmp_number =
@ -238,3 +250,11 @@ int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
CRYPTO_THREAD_unlock(namemap->lock);
return 0;
}
int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name)
{
if (name == NULL)
return 0;
return ossl_namemap_add_n(namemap, number, name, strlen(name));
}

2
crypto/err/openssl.txt
View File

@ -2394,6 +2394,7 @@ ESS_R_ESS_SIGNING_CERT_ADD_ERROR:100:ess signing cert add error
ESS_R_ESS_SIGNING_CERT_V2_ADD_ERROR:101:ess signing cert v2 add error
EVP_R_AES_KEY_SETUP_FAILED:143:aes key setup failed
EVP_R_ARIA_KEY_SETUP_FAILED:176:aria key setup failed
EVP_R_BAD_ALGORITHM_NAME:200:bad algorithm name
EVP_R_BAD_DECRYPT:100:bad decrypt
EVP_R_BAD_KEY_LENGTH:195:bad key length
EVP_R_BUFFER_TOO_SMALL:155:buffer too small
@ -2403,6 +2404,7 @@ EVP_R_CANNOT_SET_PARAMETERS:198:cannot set parameters
EVP_R_CIPHER_NOT_GCM_MODE:184:cipher not gcm mode
EVP_R_CIPHER_PARAMETER_ERROR:122:cipher parameter error
EVP_R_COMMAND_NOT_SUPPORTED:147:command not supported
EVP_R_CONFLICTING_ALGORITHM_NAME:201:conflicting algorithm name
EVP_R_COPY_ERROR:173:copy error
EVP_R_CTRL_NOT_IMPLEMENTED:132:ctrl not implemented
EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED:133:ctrl operation not implemented

3
crypto/evp/evp_err.c
View File

@ -18,6 +18,7 @@ static const ERR_STRING_DATA EVP_str_reasons[] = {
"aes key setup failed"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_ARIA_KEY_SETUP_FAILED),
"aria key setup failed"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_BAD_ALGORITHM_NAME), "bad algorithm name"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_BAD_DECRYPT), "bad decrypt"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_BAD_KEY_LENGTH), "bad key length"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_BUFFER_TOO_SMALL), "buffer too small"},
@ -33,6 +34,8 @@ static const ERR_STRING_DATA EVP_str_reasons[] = {
"cipher parameter error"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_COMMAND_NOT_SUPPORTED),
"command not supported"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_CONFLICTING_ALGORITHM_NAME),
"conflicting algorithm name"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_COPY_ERROR), "copy error"},
{ERR_PACK(ERR_LIB_EVP, 0, EVP_R_CTRL_NOT_IMPLEMENTED),
"ctrl not implemented"},

102
crypto/evp/evp_fetch.c
View File

@ -20,6 +20,8 @@
#include "crypto/evp.h" /* evp_local.h needs it */
#include "evp_local.h"
#define NAME_SEPARATOR ':'
static void default_method_store_free(void *vstore)
{
ossl_method_store_free(vstore);
@ -42,7 +44,7 @@ struct method_data_st {
OSSL_METHOD_CONSTRUCT_METHOD *mcm;
int operation_id; /* For get_method_from_store() */
int name_id; /* For get_method_from_store() */
const char *name; /* For get_method_from_store() */
const char *names; /* For get_method_from_store() */
const char *propquery; /* For get_method_from_store() */
void *(*method_from_dispatch)(int name_id, const OSSL_DISPATCH *,
OSSL_PROVIDER *, void *);
@ -51,6 +53,69 @@ struct method_data_st {
void (*destruct_method)(void *method);
};
static int add_names_to_namemap(OSSL_NAMEMAP *namemap,
const char *names)
{
const char *p, *q;
size_t l;
int id = 0;
/* Check that we have a namemap and that there is at least one name */
if (namemap == NULL) {
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
/*
* 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_id;
if ((q = strchr(p, NAME_SEPARATOR)) == NULL)
l = strlen(p); /* offset to \0 */
else
l = q - p; /* offset to the next separator */
this_id = ossl_namemap_name2num_n(namemap, p, l);
if (*p == '\0' || *p == NAME_SEPARATOR) {
ERR_raise(ERR_LIB_EVP, EVP_R_BAD_ALGORITHM_NAME);
return 0;
}
if (id == 0)
id = this_id;
else if (this_id != 0 && this_id != id) {
ERR_raise_data(ERR_LIB_EVP, EVP_R_CONFLICTING_ALGORITHM_NAME,
"\"%.*s\" has an existing different identity %d (from \"%s\")",
l, p, this_id, names);
return 0;
}
}
/* Now that we have checked, register all names */
for (p = names; *p != '\0'; p = (q == NULL ? p + l : q + 1)) {
int this_id;
if ((q = strchr(p, NAME_SEPARATOR)) == NULL)
l = strlen(p); /* offset to \0 */
else
l = q - p; /* offset to the next separator */
this_id = ossl_namemap_add_n(namemap, id, p, l);
if (id == 0)
id = this_id;
else if (this_id != id) {
ERR_raise_data(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR,
"Got id %d when expecting %d", this_id, id);
return 0;
}
}
return id;
}
/*
* Generic routines to fetch / create EVP methods with ossl_method_construct()
*/
@ -105,10 +170,13 @@ static void *get_method_from_store(OPENSSL_CTX *libctx, void *store,
*/
if ((name_id = methdata->name_id) == 0) {
OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
const char *names = methdata->names;
const char *q = strchr(names, NAME_SEPARATOR);
size_t l = (q == NULL ? strlen(names) : (size_t)(q - names));
if (namemap == 0)
return NULL;
name_id = ossl_namemap_name2num(namemap, methdata->name);
name_id = ossl_namemap_name2num_n(namemap, names, l);
}
if (name_id == 0
@ -131,21 +199,30 @@ static void *get_method_from_store(OPENSSL_CTX *libctx, void *store,
static int put_method_in_store(OPENSSL_CTX *libctx, void *store,
void *method, const OSSL_PROVIDER *prov,
int operation_id, const char *name,
int operation_id, const char *names,
const char *propdef, void *data)
{
struct method_data_st *methdata = data;
OSSL_NAMEMAP *namemap;
int name_id;
uint32_t meth_id;
size_t l = 0;
/*
* put_method_in_store() is only called with a method that was
* successfully created by construct_method() below, which means
* the name should already be stored in the namemap, so just use it.
* that all the names should already be stored in the namemap with
* the same numeric identity, so just use the first to get that
* identity.
*/
if (names != NULL) {
const char *q = strchr(names, NAME_SEPARATOR);
l = (q == NULL ? strlen(names) : (size_t)(q - names));
}
if ((namemap = ossl_namemap_stored(libctx)) == NULL
|| (name_id = ossl_namemap_name2num(namemap, name)) == 0
|| (name_id = ossl_namemap_name2num_n(namemap, names, l)) == 0
|| (meth_id = method_id(operation_id, name_id)) == 0)
return 0;
@ -162,7 +239,7 @@ static int put_method_in_store(OPENSSL_CTX *libctx, void *store,
* The core fetching functionality passes the name of the implementation.
* This function is responsible to getting an identity number for it.
*/
static void *construct_method(const char *name, const OSSL_DISPATCH *fns,
static void *construct_method(const char *names, const OSSL_DISPATCH *fns,
OSSL_PROVIDER *prov, void *data)
{
/*
@ -170,17 +247,14 @@ static void *construct_method(const char *name, const OSSL_DISPATCH *fns,
* NULL, so it's safe to say that of all the spots to create a new
* namemap entry, this is it. Should the name already exist there, we
* know that ossl_namemap_add() will return its corresponding number.
*
* TODO(3.0): If this function gets an array of names instead of just
* one, we need to check through all the names to see if at least one
* of them has an associated number, and use that. If several names
* have associated numbers that differ from each other, it's an error.
*/
struct method_data_st *methdata = data;
OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
int name_id = ossl_namemap_add(namemap, 0, name);
int name_id = add_names_to_namemap(namemap, names);
if (name_id == 0)
return NULL;
return methdata->method_from_dispatch(name_id, fns, prov,
methdata->method_data);
}
@ -255,7 +329,7 @@ static void *inner_generic_fetch(OPENSSL_CTX *libctx, int operation_id,
mcmdata.libctx = libctx;
mcmdata.operation_id = operation_id;
mcmdata.name_id = name_id;
mcmdata.name = name;
mcmdata.names = name;
mcmdata.propquery = properties;
mcmdata.method_from_dispatch = new_method;
mcmdata.destruct_method = free_method;
@ -346,7 +420,7 @@ static void do_one(OSSL_PROVIDER *provider, const OSSL_ALGORITHM *algo,
struct do_all_data_st *data = vdata;
OPENSSL_CTX *libctx = ossl_provider_library_context(provider);
OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
int name_id = ossl_namemap_add(namemap, 0, algo->algorithm_name);
int name_id = add_names_to_namemap(namemap, algo->algorithm_names);
void *method = NULL;
if (name_id != 0)

23
doc/internal/man3/ossl_namemap_new.pod
View File

@ -3,7 +3,9 @@
=head1 NAME
ossl_namemap_new, ossl_namemap_free, ossl_namemap_stored,
ossl_namemap_add, ossl_namemap_name2num, ossl_namemap_doall_names
ossl_namemap_add, ossl_namemap_add_n,
ossl_namemap_name2num, ossl_namemap_name2num_n,
ossl_namemap_doall_names
- internal number E<lt>-E<gt> name map
=head1 SYNOPSIS
@ -16,8 +18,12 @@ ossl_namemap_add, ossl_namemap_name2num, ossl_namemap_doall_names
void ossl_namemap_free(OSSL_NAMEMAP *namemap);
int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name);
int ossl_namemap_add_n(OSSL_NAMEMAP *namemap, int number,
const char *name, size_t name_len);
int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name);
int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
const char *name, size_t name_len);
void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,
void (*fn)(const char *name, void *data),
void *data);
@ -49,6 +55,12 @@ names already associated with that number.
ossl_namemap_name2num() finds the number corresponding to the given
I<name>.
ossl_namemap_add_n() and ossl_namemap_name2num_n() do the same thing
as ossl_namemap_add() and ossl_namemap_name2num(), but take a string
length I<name_len> as well, allowing the caller to use a fragment of
a string as a name.
ossl_namemap_doall_names() walks through all names associated with
I<number> in the given I<namemap> and calls the function I<fn> for
each of them.
@ -60,15 +72,16 @@ pass extra data for that function to use.
ossl_namemap_new() and ossl_namemap_stored() return the pointer to a
B<OSSL_NAMEMAP>, or NULL on error.
ossl_namemap_add() returns the number associated with the added
string, or zero on error.
ossl_namemap_add() and ossl_namemap_add_n() return the number associated
with the added string, or zero on error.
ossl_namemap_num2names() returns a pointer to a NULL-terminated list of
pointers to the names corresponding to the given number, or NULL if
it's undefined in the given B<OSSL_NAMEMAP>.
ossl_namemap_name2num() returns the number corresponding to the given
name, or 0 if it's undefined in the given B<OSSL_NAMEMAP>.
ossl_namemap_name2num() and ossl_namemap_name2num_n() return the number
corresponding to the given name, or 0 if it's undefined in the given
B<OSSL_NAMEMAP>.
=head1 NOTES

4
include/internal/namemap.h
View File

@ -17,6 +17,8 @@ OSSL_NAMEMAP *ossl_namemap_new(void);
void ossl_namemap_free(OSSL_NAMEMAP *namemap);
int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name);
int ossl_namemap_add_n(OSSL_NAMEMAP *namemap, int number,
const char *name, size_t name_len);
/*
* The number<->name relationship is 1<->many
@ -24,6 +26,8 @@ int ossl_namemap_add(OSSL_NAMEMAP *namemap, int number, const char *name);
* number->name mapping is an iterator.
*/
int ossl_namemap_name2num(const OSSL_NAMEMAP *namemap, const char *name);
int ossl_namemap_name2num_n(const OSSL_NAMEMAP *namemap,
const char *name, size_t name_len);
const char *ossl_namemap_num2name(const OSSL_NAMEMAP *namemap, int number,
size_t idx);
void ossl_namemap_doall_names(const OSSL_NAMEMAP *namemap, int number,

6
include/openssl/core.h
View File

@ -55,13 +55,13 @@ struct ossl_item_st {
};
/*
* Type to tie together algorithm name, property definition string and
* Type to tie together algorithm names, property definition string and
* the algorithm implementation in the form of a dispatch table.
*
* An array of these is always terminated by algorithm_name == NULL
* An array of these is always terminated by algorithm_names == NULL
*/
struct ossl_algorithm_st {
const char *algorithm_name; /* key */
const char *algorithm_names; /* key */
const char *property_definition; /* key */
const OSSL_DISPATCH *implementation;
};

2
include/openssl/evperr.h
View File

@ -167,6 +167,7 @@ int ERR_load_EVP_strings(void);
*/
# define EVP_R_AES_KEY_SETUP_FAILED 143
# define EVP_R_ARIA_KEY_SETUP_FAILED 176
# define EVP_R_BAD_ALGORITHM_NAME 200
# define EVP_R_BAD_DECRYPT 100
# define EVP_R_BAD_KEY_LENGTH 195
# define EVP_R_BUFFER_TOO_SMALL 155
@ -176,6 +177,7 @@ int ERR_load_EVP_strings(void);
# define EVP_R_CIPHER_NOT_GCM_MODE 184
# define EVP_R_CIPHER_PARAMETER_ERROR 122
# define EVP_R_COMMAND_NOT_SUPPORTED 147
# define EVP_R_CONFLICTING_ALGORITHM_NAME 201
# define EVP_R_COPY_ERROR 173
# define EVP_R_CTRL_NOT_IMPLEMENTED 132
# define EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED 133