blob: ee2dd0a9738041b7df3c7a88c6a35b7781ea0c35 [file] [log] [blame]
/* 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
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#include "asn1_locl.h"
static void EVP_PKEY_free_it(EVP_PKEY *x);
int EVP_PKEY_bits(EVP_PKEY *pkey)
{
if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
return pkey->ameth->pkey_bits(pkey);
return 0;
}
int EVP_PKEY_size(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)
{
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;
}
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=(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->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);
}
EVP_PKEY *EVP_PKEY_dup(EVP_PKEY *pkey)
{
return EVP_PKEY_up_ref(pkey);
}
/* 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, int type, const char *str, int len)
{
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *e = NULL;
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
/* If we have an ENGINE release it */
if (pkey->engine)
{
ENGINE_finish(pkey->engine);
pkey->engine = NULL;
}
#endif
}
if (str)
ameth = EVP_PKEY_asn1_find_str(&e, str, len);
else
ameth = EVP_PKEY_asn1_find(&e, type);
#ifndef OPENSSL_NO_ENGINE
if (!pkey && e)
ENGINE_finish(e);
#endif
if (!ameth)
{
EVPerr(EVP_F_PKEY_SET_TYPE, 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, type, NULL, -1);
}
int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
{
return pkey_set_type(pkey, 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(EVP_PKEY *pkey)
{
return pkey->pkey.ptr;
}
#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)
{
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
if (e)
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);
#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);
}
EVP_PKEY *EVP_PKEY_up_ref(EVP_PKEY *pkey)
{
CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
return pkey;
}
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
if (x->engine)
{
ENGINE_finish(x->engine);
x->engine = NULL;
}
#endif
}
static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
const char *kstr)
{
BIO_indent(out, indent, 128);
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);
}