pineapple/externals/libressl/crypto/evp/p_lib.c
2022-04-24 22:29:35 +02:00

573 lines
12 KiB
C
Executable file

/* $OpenBSD: p_lib.c,v 1.28 2022/01/20 11:06:24 inoguchi Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include <openssl/opensslconf.h>
#include <openssl/bn.h>
#include <openssl/cmac.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include "asn1_locl.h"
#include "evp_locl.h"
static void EVP_PKEY_free_it(EVP_PKEY *x);
int
EVP_PKEY_bits(const EVP_PKEY *pkey)
{
if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
return pkey->ameth->pkey_bits(pkey);
return 0;
}
int
EVP_PKEY_size(const EVP_PKEY *pkey)
{
if (pkey && pkey->ameth && pkey->ameth->pkey_size)
return pkey->ameth->pkey_size(pkey);
return 0;
}
int
EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
{
#ifndef OPENSSL_NO_DSA
if (pkey->type == EVP_PKEY_DSA) {
int ret = pkey->save_parameters;
if (mode >= 0)
pkey->save_parameters = mode;
return (ret);
}
#endif
#ifndef OPENSSL_NO_EC
if (pkey->type == EVP_PKEY_EC) {
int ret = pkey->save_parameters;
if (mode >= 0)
pkey->save_parameters = mode;
return (ret);
}
#endif
return (0);
}
int
EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
{
if (to->type != from->type) {
EVPerror(EVP_R_DIFFERENT_KEY_TYPES);
goto err;
}
if (EVP_PKEY_missing_parameters(from)) {
EVPerror(EVP_R_MISSING_PARAMETERS);
goto err;
}
if (from->ameth && from->ameth->param_copy)
return from->ameth->param_copy(to, from);
err:
return 0;
}
int
EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
{
if (pkey->ameth && pkey->ameth->param_missing)
return pkey->ameth->param_missing(pkey);
return 0;
}
int
EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
{
if (a->type != b->type)
return -1;
if (a->ameth && a->ameth->param_cmp)
return a->ameth->param_cmp(a, b);
return -2;
}
int
EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
{
if (a->type != b->type)
return -1;
if (a->ameth) {
int ret;
/* Compare parameters if the algorithm has them */
if (a->ameth->param_cmp) {
ret = a->ameth->param_cmp(a, b);
if (ret <= 0)
return ret;
}
if (a->ameth->pub_cmp)
return a->ameth->pub_cmp(a, b);
}
return -2;
}
EVP_PKEY *
EVP_PKEY_new(void)
{
EVP_PKEY *ret;
ret = malloc(sizeof(EVP_PKEY));
if (ret == NULL) {
EVPerror(ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->type = EVP_PKEY_NONE;
ret->save_type = EVP_PKEY_NONE;
ret->references = 1;
ret->ameth = NULL;
ret->engine = NULL;
ret->pkey.ptr = NULL;
ret->attributes = NULL;
ret->save_parameters = 1;
return (ret);
}
int
EVP_PKEY_up_ref(EVP_PKEY *pkey)
{
int refs = CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
return ((refs > 1) ? 1 : 0);
}
/* Setup a public key ASN1 method and ENGINE from a NID or a string.
* If pkey is NULL just return 1 or 0 if the algorithm exists.
*/
static int
pkey_set_type(EVP_PKEY *pkey, ENGINE *e, int type, const char *str, int len)
{
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE **eptr = NULL;
if (e == NULL)
eptr = &e;
if (pkey) {
if (pkey->pkey.ptr)
EVP_PKEY_free_it(pkey);
/* If key type matches and a method exists then this
* lookup has succeeded once so just indicate success.
*/
if ((type == pkey->save_type) && pkey->ameth)
return 1;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(pkey->engine);
pkey->engine = NULL;
#endif
}
if (str)
ameth = EVP_PKEY_asn1_find_str(eptr, str, len);
else
ameth = EVP_PKEY_asn1_find(eptr, type);
#ifndef OPENSSL_NO_ENGINE
if (pkey == NULL && eptr != NULL)
ENGINE_finish(e);
#endif
if (!ameth) {
EVPerror(EVP_R_UNSUPPORTED_ALGORITHM);
return 0;
}
if (pkey) {
pkey->ameth = ameth;
pkey->engine = e;
pkey->type = pkey->ameth->pkey_id;
pkey->save_type = type;
}
return 1;
}
int
EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
{
return pkey_set_type(pkey, NULL, type, NULL, -1);
}
EVP_PKEY *
EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv, size_t len,
const EVP_CIPHER *cipher)
{
EVP_PKEY *ret = NULL;
CMAC_CTX *cmctx = NULL;
if ((ret = EVP_PKEY_new()) == NULL)
goto err;
if ((cmctx = CMAC_CTX_new()) == NULL)
goto err;
if (!pkey_set_type(ret, e, EVP_PKEY_CMAC, NULL, -1))
goto err;
if (!CMAC_Init(cmctx, priv, len, cipher, e)) {
EVPerror(EVP_R_KEY_SETUP_FAILED);
goto err;
}
ret->pkey.ptr = (char *)cmctx;
return ret;
err:
EVP_PKEY_free(ret);
CMAC_CTX_free(cmctx);
return NULL;
}
int
EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
{
return pkey_set_type(pkey, NULL, EVP_PKEY_NONE, str, len);
}
int
EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
{
if (!EVP_PKEY_set_type(pkey, type))
return 0;
pkey->pkey.ptr = key;
return (key != NULL);
}
void *
EVP_PKEY_get0(const EVP_PKEY *pkey)
{
return pkey->pkey.ptr;
}
const unsigned char *
EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
{
ASN1_OCTET_STRING *os;
if (pkey->type != EVP_PKEY_HMAC) {
EVPerror(EVP_R_EXPECTING_AN_HMAC_KEY);
return NULL;
}
os = EVP_PKEY_get0(pkey);
*len = os->length;
return os->data;
}
#ifndef OPENSSL_NO_RSA
RSA *
EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_RSA) {
EVPerror(EVP_R_EXPECTING_AN_RSA_KEY);
return NULL;
}
return pkey->pkey.rsa;
}
RSA *
EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_RSA) {
EVPerror(EVP_R_EXPECTING_AN_RSA_KEY);
return NULL;
}
RSA_up_ref(pkey->pkey.rsa);
return pkey->pkey.rsa;
}
int
EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
{
int ret = EVP_PKEY_assign_RSA(pkey, key);
if (ret != 0)
RSA_up_ref(key);
return ret;
}
#endif
#ifndef OPENSSL_NO_DSA
DSA *
EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DSA) {
EVPerror(EVP_R_EXPECTING_A_DSA_KEY);
return NULL;
}
return pkey->pkey.dsa;
}
DSA *
EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DSA) {
EVPerror(EVP_R_EXPECTING_A_DSA_KEY);
return NULL;
}
DSA_up_ref(pkey->pkey.dsa);
return pkey->pkey.dsa;
}
int
EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
{
int ret = EVP_PKEY_assign_DSA(pkey, key);
if (ret != 0)
DSA_up_ref(key);
return ret;
}
#endif
#ifndef OPENSSL_NO_EC
EC_KEY *
EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_EC) {
EVPerror(EVP_R_EXPECTING_A_EC_KEY);
return NULL;
}
return pkey->pkey.ec;
}
EC_KEY *
EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_EC) {
EVPerror(EVP_R_EXPECTING_A_EC_KEY);
return NULL;
}
EC_KEY_up_ref(pkey->pkey.ec);
return pkey->pkey.ec;
}
int
EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
{
int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
if (ret != 0)
EC_KEY_up_ref(key);
return ret;
}
#endif
#ifndef OPENSSL_NO_DH
DH *
EVP_PKEY_get0_DH(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DH) {
EVPerror(EVP_R_EXPECTING_A_DH_KEY);
return NULL;
}
return pkey->pkey.dh;
}
DH *
EVP_PKEY_get1_DH(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DH) {
EVPerror(EVP_R_EXPECTING_A_DH_KEY);
return NULL;
}
DH_up_ref(pkey->pkey.dh);
return pkey->pkey.dh;
}
int
EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
{
int ret = EVP_PKEY_assign_DH(pkey, key);
if (ret != 0)
DH_up_ref(key);
return ret;
}
#endif
int
EVP_PKEY_type(int type)
{
int ret;
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *e;
ameth = EVP_PKEY_asn1_find(&e, type);
if (ameth)
ret = ameth->pkey_id;
else
ret = NID_undef;
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(e);
#endif
return ret;
}
int
EVP_PKEY_id(const EVP_PKEY *pkey)
{
return pkey->type;
}
int
EVP_PKEY_base_id(const EVP_PKEY *pkey)
{
return EVP_PKEY_type(pkey->type);
}
void
EVP_PKEY_free(EVP_PKEY *x)
{
int i;
if (x == NULL)
return;
i = CRYPTO_add(&x->references, -1, CRYPTO_LOCK_EVP_PKEY);
if (i > 0)
return;
EVP_PKEY_free_it(x);
if (x->attributes)
sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
free(x);
}
static void
EVP_PKEY_free_it(EVP_PKEY *x)
{
if (x->ameth && x->ameth->pkey_free) {
x->ameth->pkey_free(x);
x->pkey.ptr = NULL;
}
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(x->engine);
x->engine = NULL;
#endif
}
static int
unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent, const char *kstr)
{
if (!BIO_indent(out, indent, 128))
return 0;
BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
kstr, OBJ_nid2ln(pkey->type));
return 1;
}
int
EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
if (pkey->ameth && pkey->ameth->pub_print)
return pkey->ameth->pub_print(out, pkey, indent, pctx);
return unsup_alg(out, pkey, indent, "Public Key");
}
int
EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
if (pkey->ameth && pkey->ameth->priv_print)
return pkey->ameth->priv_print(out, pkey, indent, pctx);
return unsup_alg(out, pkey, indent, "Private Key");
}
int
EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey, int indent,
ASN1_PCTX *pctx)
{
if (pkey->ameth && pkey->ameth->param_print)
return pkey->ameth->param_print(out, pkey, indent, pctx);
return unsup_alg(out, pkey, indent, "Parameters");
}
int
EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
{
if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
return -2;
return pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID,
0, pnid);
}