p_lib.c
/* crypto/evp/p_lib.c */
/* 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 "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/asn1_mac.h>
#include <openssl/x509.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
static void EVP_PKEY_free_it(EVP_PKEY *x);
int EVP_PKEY_bits(EVP_PKEY *pkey)
{
if (0)
return 0;
#ifndef OPENSSL_NO_RSA
else if (pkey->type == EVP_PKEY_RSA)
return (BN_num_bits(pkey->pkey.rsa->n));
#endif
#ifndef OPENSSL_NO_DSA
else if (pkey->type == EVP_PKEY_DSA)
return (BN_num_bits(pkey->pkey.dsa->p));
#endif
#ifndef OPENSSL_NO_EC
else if (pkey->type == EVP_PKEY_EC) {
BIGNUM *order = BN_new();
const EC_GROUP *group;
int ret;
if (!order) {
ERR_clear_error();
return 0;
}
group = EC_KEY_get0_group(pkey->pkey.ec);
if (!EC_GROUP_get_order(group, order, NULL)) {
ERR_clear_error();
return 0;
}
ret = BN_num_bits(order);
BN_free(order);
return ret;
}
#endif
return (0);
}
int EVP_PKEY_size(EVP_PKEY *pkey)
{
if (pkey == NULL)
return (0);
#ifndef OPENSSL_NO_RSA
if (pkey->type == EVP_PKEY_RSA)
return (RSA_size(pkey->pkey.rsa));
else
#endif
#ifndef OPENSSL_NO_DSA
if (pkey->type == EVP_PKEY_DSA)
return (DSA_size(pkey->pkey.dsa));
#endif
#ifndef OPENSSL_NO_ECDSA
if (pkey->type == EVP_PKEY_EC)
return (ECDSA_size(pkey->pkey.ec));
#endif
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) {
EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
goto err;
}
if (EVP_PKEY_missing_parameters(from)) {
EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
goto err;
}
#ifndef OPENSSL_NO_DSA
if (to->type == EVP_PKEY_DSA) {
BIGNUM *a;
if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
goto err;
if (to->pkey.dsa->p != NULL)
BN_free(to->pkey.dsa->p);
to->pkey.dsa->p = a;
if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
goto err;
if (to->pkey.dsa->q != NULL)
BN_free(to->pkey.dsa->q);
to->pkey.dsa->q = a;
if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
goto err;
if (to->pkey.dsa->g != NULL)
BN_free(to->pkey.dsa->g);
to->pkey.dsa->g = a;
}
#endif
#ifndef OPENSSL_NO_EC
if (to->type == EVP_PKEY_EC) {
EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));
if (group == NULL)
goto err;
if (EC_KEY_set_group(to->pkey.ec, group) == 0)
goto err;
EC_GROUP_free(group);
}
#endif
return (1);
err:
return (0);
}
int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
{
#ifndef OPENSSL_NO_DSA
if (pkey->type == EVP_PKEY_DSA) {
DSA *dsa;
dsa = pkey->pkey.dsa;
if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
return (1);
}
#endif
#ifndef OPENSSL_NO_EC
if (pkey->type == EVP_PKEY_EC) {
if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)
return (1);
}
#endif
return (0);
}
int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
{
#ifndef OPENSSL_NO_DSA
if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA)) {
if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
return (0);
else
return (1);
}
#endif
#ifndef OPENSSL_NO_EC
if (a->type == EVP_PKEY_EC && b->type == EVP_PKEY_EC) {
const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),
*group_b = EC_KEY_get0_group(b->pkey.ec);
if (EC_GROUP_cmp(group_a, group_b, NULL))
return 0;
else
return 1;
}
#endif
return (-1);
}
int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
{
if (a->type != b->type)
return -1;
if (EVP_PKEY_cmp_parameters(a, b) == 0)
return 0;
switch (a->type) {
#ifndef OPENSSL_NO_RSA
case EVP_PKEY_RSA:
if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
|| BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
return 0;
break;
#endif
#ifndef OPENSSL_NO_DSA
case EVP_PKEY_DSA:
if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
return 0;
break;
#endif
#ifndef OPENSSL_NO_EC
case EVP_PKEY_EC:
{
int r;
const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);
const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),
*pb = EC_KEY_get0_public_key(b->pkey.ec);
r = EC_POINT_cmp(group, pa, pb, NULL);
if (r != 0) {
if (r == 1)
return 0;
else
return -2;
}
}
break;
#endif
#ifndef OPENSSL_NO_DH
case EVP_PKEY_DH:
return -2;
#endif
default:
return -2;
}
return 1;
}
EVP_PKEY *EVP_PKEY_new(void)
{
EVP_PKEY *ret;
ret = (EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));
if (ret == NULL) {
EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
return (NULL);
}
ret->type = EVP_PKEY_NONE;
ret->references = 1;
ret->pkey.ptr = NULL;
ret->attributes = NULL;
ret->save_parameters = 1;
return (ret);
}
int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)
{
if (pkey == NULL)
return (0);
if (pkey->pkey.ptr != NULL)
EVP_PKEY_free_it(pkey);
pkey->type = EVP_PKEY_type(type);
pkey->save_type = type;
pkey->pkey.ptr = key;
return (key != NULL);
}
#ifndef OPENSSL_NO_RSA
int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
{
int ret = EVP_PKEY_assign_RSA(pkey, key);
if (ret)
RSA_up_ref(key);
return ret;
}
RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_RSA) {
EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
return NULL;
}
RSA_up_ref(pkey->pkey.rsa);
return pkey->pkey.rsa;
}
#endif
#ifndef OPENSSL_NO_DSA
int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
{
int ret = EVP_PKEY_assign_DSA(pkey, key);
if (ret)
DSA_up_ref(key);
return ret;
}
DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DSA) {
EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);
return NULL;
}
DSA_up_ref(pkey->pkey.dsa);
return pkey->pkey.dsa;
}
#endif
#ifndef OPENSSL_NO_EC
int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
{
int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
if (ret)
EC_KEY_up_ref(key);
return ret;
}
EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_EC) {
EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
return NULL;
}
EC_KEY_up_ref(pkey->pkey.ec);
return pkey->pkey.ec;
}
#endif
#ifndef OPENSSL_NO_DH
int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
{
int ret = EVP_PKEY_assign_DH(pkey, key);
if (ret)
DH_up_ref(key);
return ret;
}
DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
{
if (pkey->type != EVP_PKEY_DH) {
EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);
return NULL;
}
DH_up_ref(pkey->pkey.dh);
return pkey->pkey.dh;
}
#endif
int EVP_PKEY_type(int type)
{
switch (type) {
case EVP_PKEY_RSA:
case EVP_PKEY_RSA2:
return (EVP_PKEY_RSA);
case EVP_PKEY_DSA:
case EVP_PKEY_DSA1:
case EVP_PKEY_DSA2:
case EVP_PKEY_DSA3:
case EVP_PKEY_DSA4:
return (EVP_PKEY_DSA);
case EVP_PKEY_DH:
return (EVP_PKEY_DH);
case EVP_PKEY_EC:
return (EVP_PKEY_EC);
default:
return (NID_undef);
}
}
void EVP_PKEY_free(EVP_PKEY *x)
{
int i;
if (x == NULL)
return;
i = CRYPTO_add(&x->references, -1, CRYPTO_LOCK_EVP_PKEY);
#ifdef REF_PRINT
REF_PRINT("EVP_PKEY", x);
#endif
if (i > 0)
return;
#ifdef REF_CHECK
if (i < 0) {
fprintf(stderr, "EVP_PKEY_free, bad reference count\n");
abort();
}
#endif
EVP_PKEY_free_it(x);
if (x->attributes)
sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
OPENSSL_free(x);
}
static void EVP_PKEY_free_it(EVP_PKEY *x)
{
switch (x->type) {
#ifndef OPENSSL_NO_RSA
case EVP_PKEY_RSA:
case EVP_PKEY_RSA2:
RSA_free(x->pkey.rsa);
break;
#endif
#ifndef OPENSSL_NO_DSA
case EVP_PKEY_DSA:
case EVP_PKEY_DSA2:
case EVP_PKEY_DSA3:
case EVP_PKEY_DSA4:
DSA_free(x->pkey.dsa);
break;
#endif
#ifndef OPENSSL_NO_EC
case EVP_PKEY_EC:
EC_KEY_free(x->pkey.ec);
break;
#endif
#ifndef OPENSSL_NO_DH
case EVP_PKEY_DH:
DH_free(x->pkey.dh);
break;
#endif
}
}
