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/*
* Copyright 1995-2021 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 <stdio.h>
#include <openssl/evp.h>
#include <openssl/kdf.h>
#include <openssl/x509.h>
#include "internal/cryptlib.h"
#include "internal/namemap.h"
#include "crypto/objects.h"
#include "crypto/evp.h"
int EVP_add_cipher(const EVP_CIPHER *c)
{
int r;
if (c == NULL)
return 0;
r = OBJ_NAME_add(OBJ_nid2sn(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
(const char *)c);
if (r == 0)
return 0;
r = OBJ_NAME_add(OBJ_nid2ln(c->nid), OBJ_NAME_TYPE_CIPHER_METH,
(const char *)c);
return r;
}
int EVP_add_digest(const EVP_MD *md)
{
int r;
const char *name;
name = OBJ_nid2sn(md->type);
r = OBJ_NAME_add(name, OBJ_NAME_TYPE_MD_METH, (const char *)md);
if (r == 0)
return 0;
r = OBJ_NAME_add(OBJ_nid2ln(md->type), OBJ_NAME_TYPE_MD_METH,
(const char *)md);
if (r == 0)
return 0;
if (md->pkey_type && md->type != md->pkey_type) {
r = OBJ_NAME_add(OBJ_nid2sn(md->pkey_type),
OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
if (r == 0)
return 0;
r = OBJ_NAME_add(OBJ_nid2ln(md->pkey_type),
OBJ_NAME_TYPE_MD_METH | OBJ_NAME_ALIAS, name);
}
return r;
}
static void cipher_from_name(const char *name, void *data)
{
const EVP_CIPHER **cipher = data;
if (*cipher != NULL)
return;
*cipher = (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
}
const EVP_CIPHER *EVP_get_cipherbyname(const char *name)
{
return evp_get_cipherbyname_ex(NULL, name);
}
const EVP_CIPHER *evp_get_cipherbyname_ex(OSSL_LIB_CTX *libctx,
const char *name)
{
const EVP_CIPHER *cp;
OSSL_NAMEMAP *namemap;
int id;
if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL))
return NULL;
cp = (const EVP_CIPHER *)OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
if (cp != NULL)
return cp;
/*
* It's not in the method database, but it might be there under a different
* name. So we check for aliases in the EVP namemap and try all of those
* in turn.
*/
namemap = ossl_namemap_stored(libctx);
id = ossl_namemap_name2num(namemap, name);
if (id == 0)
return NULL;
if (!ossl_namemap_doall_names(namemap, id, cipher_from_name, &cp))
return NULL;
return cp;
}
static void digest_from_name(const char *name, void *data)
{
const EVP_MD **md = data;
if (*md != NULL)
return;
*md = (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
}
const EVP_MD *EVP_get_digestbyname(const char *name)
{
return evp_get_digestbyname_ex(NULL, name);
}
const EVP_MD *evp_get_digestbyname_ex(OSSL_LIB_CTX *libctx, const char *name)
{
const EVP_MD *dp;
OSSL_NAMEMAP *namemap;
int id;
if (!OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL))
return NULL;
dp = (const EVP_MD *)OBJ_NAME_get(name, OBJ_NAME_TYPE_MD_METH);
if (dp != NULL)
return dp;
/*
* It's not in the method database, but it might be there under a different
* name. So we check for aliases in the EVP namemap and try all of those
* in turn.
*/
namemap = ossl_namemap_stored(libctx);
id = ossl_namemap_name2num(namemap, name);
if (id == 0)
return NULL;
if (!ossl_namemap_doall_names(namemap, id, digest_from_name, &dp))
return NULL;
return dp;
}
void evp_cleanup_int(void)
{
OBJ_NAME_cleanup(OBJ_NAME_TYPE_KDF_METH);
OBJ_NAME_cleanup(OBJ_NAME_TYPE_CIPHER_METH);
OBJ_NAME_cleanup(OBJ_NAME_TYPE_MD_METH);
/*
* The above calls will only clean out the contents of the name hash
* table, but not the hash table itself. The following line does that
* part. -- Richard Levitte
*/
OBJ_NAME_cleanup(-1);
EVP_PBE_cleanup();
OBJ_sigid_free();
evp_app_cleanup_int();
}
struct doall_cipher {
void *arg;
void (*fn) (const EVP_CIPHER *ciph,
const char *from, const char *to, void *arg);
};
static void do_all_cipher_fn(const OBJ_NAME *nm, void *arg)
{
struct doall_cipher *dc = arg;
if (nm->alias)
dc->fn(NULL, nm->name, nm->data, dc->arg);
else
dc->fn((const EVP_CIPHER *)nm->data, nm->name, NULL, dc->arg);
}
void EVP_CIPHER_do_all(void (*fn) (const EVP_CIPHER *ciph,
const char *from, const char *to, void *x),
void *arg)
{
struct doall_cipher dc;
/* Ignore errors */
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL);
dc.fn = fn;
dc.arg = arg;
OBJ_NAME_do_all(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
}
void EVP_CIPHER_do_all_sorted(void (*fn) (const EVP_CIPHER *ciph,
const char *from, const char *to,
void *x), void *arg)
{
struct doall_cipher dc;
/* Ignore errors */
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL);
dc.fn = fn;
dc.arg = arg;
OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, do_all_cipher_fn, &dc);
}
struct doall_md {
void *arg;
void (*fn) (const EVP_MD *ciph,
const char *from, const char *to, void *arg);
};
static void do_all_md_fn(const OBJ_NAME *nm, void *arg)
{
struct doall_md *dc = arg;
if (nm->alias)
dc->fn(NULL, nm->name, nm->data, dc->arg);
else
dc->fn((const EVP_MD *)nm->data, nm->name, NULL, dc->arg);
}
void EVP_MD_do_all(void (*fn) (const EVP_MD *md,
const char *from, const char *to, void *x),
void *arg)
{
struct doall_md dc;
/* Ignore errors */
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
dc.fn = fn;
dc.arg = arg;
OBJ_NAME_do_all(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
}
void EVP_MD_do_all_sorted(void (*fn) (const EVP_MD *md,
const char *from, const char *to,
void *x), void *arg)
{
struct doall_md dc;
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
dc.fn = fn;
dc.arg = arg;
OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_MD_METH, do_all_md_fn, &dc);
}
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