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CORE: Rework the pre-population of the namemap

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The pre-population of names has become more thorough.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15066)
This commit is contained in:
Richard Levitte 2021-04-28 21:28:11 +02:00
parent e73fc81345
commit c230e938c7
1 changed files with 31 additions and 40 deletions
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71
crypto/core_namemap.c
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@ -379,66 +379,62 @@ int ossl_namemap_add_names(OSSL_NAMEMAP *namemap, int number,
#include <openssl/evp.h>
/* Creates an initial namemap with names found in the legacy method db */
static void get_legacy_evp_names(const char *name, const char *desc,
const ASN1_OBJECT *obj, void *arg)
static void get_legacy_evp_names(int base_nid, int nid, const char *pem_name,
void *arg)
{
int num = ossl_namemap_add_name(arg, 0, name);
int num = 0;
ASN1_OBJECT *obj;
/*
* We currently treat the description ("long name" in OBJ speak) as an
* alias.
*/
/*
* We could check that the returned value is the same as 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 (desc != NULL) {
(void)ossl_namemap_add_name(arg, num, desc);
if (base_nid != NID_undef) {
num = ossl_namemap_add_name(arg, num, OBJ_nid2sn(base_nid));
num = ossl_namemap_add_name(arg, num, OBJ_nid2ln(base_nid));
}
if (obj != NULL) {
char txtoid[OSSL_MAX_NAME_SIZE];
if (nid != NID_undef) {
num = ossl_namemap_add_name(arg, num, OBJ_nid2sn(nid));
num = ossl_namemap_add_name(arg, num, OBJ_nid2ln(nid));
if ((obj = OBJ_nid2obj(nid)) != NULL) {
char txtoid[OSSL_MAX_NAME_SIZE];
if (OBJ_obj2txt(txtoid, sizeof(txtoid), obj, 1))
(void)ossl_namemap_add_name(arg, num, txtoid);
if (OBJ_obj2txt(txtoid, sizeof(txtoid), obj, 1))
num = ossl_namemap_add_name(arg, num, txtoid);
}
}
if (pem_name != NULL)
num = ossl_namemap_add_name(arg, num, pem_name);
}
static void get_legacy_cipher_names(const OBJ_NAME *on, void *arg)
{
const EVP_CIPHER *cipher = (void *)OBJ_NAME_get(on->name, on->type);
int nid = EVP_CIPHER_type(cipher);
get_legacy_evp_names(OBJ_nid2sn(nid), OBJ_nid2ln(nid), OBJ_nid2obj(nid),
arg);
get_legacy_evp_names(NID_undef, EVP_CIPHER_type(cipher), NULL, 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);
int nid = EVP_MD_type(md);
get_legacy_evp_names(OBJ_nid2sn(nid), OBJ_nid2ln(nid), OBJ_nid2obj(nid),
arg);
get_legacy_evp_names(0, EVP_MD_type(md), NULL, arg);
}
static void get_legacy_pkey_meth_names(const EVP_PKEY_ASN1_METHOD *ameth,
void *arg)
{
int nid = 0, base_nid = 0, flags = 0;
const char *pem_name = NULL;
EVP_PKEY_asn1_get0_info(&nid, &base_nid, &flags, NULL, NULL, ameth);
EVP_PKEY_asn1_get0_info(&nid, &base_nid, &flags, NULL, &pem_name, ameth);
if (nid != NID_undef) {
if ((flags & ASN1_PKEY_ALIAS) == 0) {
get_legacy_evp_names(OBJ_nid2sn(nid), OBJ_nid2ln(nid),
OBJ_nid2obj(nid), arg);
switch (nid) {
case EVP_PKEY_DHX:
/* We know that the name "DHX" is used too */
get_legacy_evp_names(0, nid, "DHX", arg);
/* FALLTHRU */
default:
get_legacy_evp_names(0, nid, pem_name, arg);
}
} else {
/*
* Treat aliases carefully, some of them are undesirable, or
@ -447,20 +443,15 @@ static void get_legacy_pkey_meth_names(const EVP_PKEY_ASN1_METHOD *ameth,
switch (nid) {
case EVP_PKEY_SM2:
case EVP_PKEY_DHX:
/*
* SM2 is a separate keytype with providers, not an alias for
* EC.
* DHX is a separate keytype with providers, not an alias for
* DH.
*/
get_legacy_evp_names(OBJ_nid2sn(nid), OBJ_nid2ln(nid),
OBJ_nid2obj(nid), arg);
get_legacy_evp_names(0, nid, pem_name, arg);
break;
default:
/* Use the short name of the base nid as the common reference */
get_legacy_evp_names(OBJ_nid2sn(base_nid), OBJ_nid2ln(nid),
OBJ_nid2obj(nid), arg);
get_legacy_evp_names(base_nid, nid, pem_name, arg);
}
}
}