yuzu/externals/libressl/crypto/asn1/x_pubkey.c

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2020-12-28 19:15:37 +04:00
/* $OpenBSD: x_pubkey.c,v 1.27 2018/03/17 14:55:39 jsing 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/asn1t.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#include "asn1_locl.h"
/* Minor tweak to operation: free up EVP_PKEY */
static int
pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
{
if (operation == ASN1_OP_FREE_POST) {
X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
EVP_PKEY_free(pubkey->pkey);
}
return 1;
}
static const ASN1_AUX X509_PUBKEY_aux = {
.asn1_cb = pubkey_cb,
};
static const ASN1_TEMPLATE X509_PUBKEY_seq_tt[] = {
{
.offset = offsetof(X509_PUBKEY, algor),
.field_name = "algor",
.item = &X509_ALGOR_it,
},
{
.offset = offsetof(X509_PUBKEY, public_key),
.field_name = "public_key",
.item = &ASN1_BIT_STRING_it,
},
};
const ASN1_ITEM X509_PUBKEY_it = {
.itype = ASN1_ITYPE_SEQUENCE,
.utype = V_ASN1_SEQUENCE,
.templates = X509_PUBKEY_seq_tt,
.tcount = sizeof(X509_PUBKEY_seq_tt) / sizeof(ASN1_TEMPLATE),
.funcs = &X509_PUBKEY_aux,
.size = sizeof(X509_PUBKEY),
.sname = "X509_PUBKEY",
};
X509_PUBKEY *
d2i_X509_PUBKEY(X509_PUBKEY **a, const unsigned char **in, long len)
{
return (X509_PUBKEY *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
&X509_PUBKEY_it);
}
int
i2d_X509_PUBKEY(X509_PUBKEY *a, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)a, out, &X509_PUBKEY_it);
}
X509_PUBKEY *
X509_PUBKEY_new(void)
{
return (X509_PUBKEY *)ASN1_item_new(&X509_PUBKEY_it);
}
void
X509_PUBKEY_free(X509_PUBKEY *a)
{
ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);
}
int
X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
{
X509_PUBKEY *pk = NULL;
if (x == NULL)
return (0);
if ((pk = X509_PUBKEY_new()) == NULL)
goto error;
if (pkey->ameth) {
if (pkey->ameth->pub_encode) {
if (!pkey->ameth->pub_encode(pk, pkey)) {
X509error(X509_R_PUBLIC_KEY_ENCODE_ERROR);
goto error;
}
} else {
X509error(X509_R_METHOD_NOT_SUPPORTED);
goto error;
}
} else {
X509error(X509_R_UNSUPPORTED_ALGORITHM);
goto error;
}
if (*x != NULL)
X509_PUBKEY_free(*x);
*x = pk;
return 1;
error:
if (pk != NULL)
X509_PUBKEY_free(pk);
return 0;
}
EVP_PKEY *
X509_PUBKEY_get0(X509_PUBKEY *key)
{
EVP_PKEY *ret = NULL;
if (key == NULL)
goto error;
if (key->pkey != NULL)
return key->pkey;
if (key->public_key == NULL)
goto error;
if ((ret = EVP_PKEY_new()) == NULL) {
X509error(ERR_R_MALLOC_FAILURE);
goto error;
}
if (!EVP_PKEY_set_type(ret, OBJ_obj2nid(key->algor->algorithm))) {
X509error(X509_R_UNSUPPORTED_ALGORITHM);
goto error;
}
if (ret->ameth->pub_decode) {
if (!ret->ameth->pub_decode(ret, key)) {
X509error(X509_R_PUBLIC_KEY_DECODE_ERROR);
goto error;
}
} else {
X509error(X509_R_METHOD_NOT_SUPPORTED);
goto error;
}
/* Check to see if another thread set key->pkey first */
CRYPTO_w_lock(CRYPTO_LOCK_EVP_PKEY);
if (key->pkey) {
CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
EVP_PKEY_free(ret);
ret = key->pkey;
} else {
key->pkey = ret;
CRYPTO_w_unlock(CRYPTO_LOCK_EVP_PKEY);
}
return ret;
error:
EVP_PKEY_free(ret);
return (NULL);
}
EVP_PKEY *
X509_PUBKEY_get(X509_PUBKEY *key)
{
EVP_PKEY *pkey;
if ((pkey = X509_PUBKEY_get0(key)) == NULL)
return (NULL);
CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
return pkey;
}
/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
* and encode or decode as X509_PUBKEY
*/
EVP_PKEY *
d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
{
X509_PUBKEY *xpk;
EVP_PKEY *pktmp;
xpk = d2i_X509_PUBKEY(NULL, pp, length);
if (!xpk)
return NULL;
pktmp = X509_PUBKEY_get(xpk);
X509_PUBKEY_free(xpk);
if (!pktmp)
return NULL;
if (a) {
EVP_PKEY_free(*a);
*a = pktmp;
}
return pktmp;
}
int
i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
{
X509_PUBKEY *xpk = NULL;
int ret;
if (!a)
return 0;
if (!X509_PUBKEY_set(&xpk, a))
return 0;
ret = i2d_X509_PUBKEY(xpk, pp);
X509_PUBKEY_free(xpk);
return ret;
}
/* The following are equivalents but which return RSA and DSA
* keys
*/
#ifndef OPENSSL_NO_RSA
RSA *
d2i_RSA_PUBKEY(RSA **a, const unsigned char **pp, long length)
{
EVP_PKEY *pkey;
RSA *key;
const unsigned char *q;
q = *pp;
pkey = d2i_PUBKEY(NULL, &q, length);
if (!pkey)
return NULL;
key = EVP_PKEY_get1_RSA(pkey);
EVP_PKEY_free(pkey);
if (!key)
return NULL;
*pp = q;
if (a) {
RSA_free(*a);
*a = key;
}
return key;
}
int
i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
{
EVP_PKEY *pktmp;
int ret;
if (!a)
return 0;
pktmp = EVP_PKEY_new();
if (!pktmp) {
ASN1error(ERR_R_MALLOC_FAILURE);
return 0;
}
EVP_PKEY_set1_RSA(pktmp, a);
ret = i2d_PUBKEY(pktmp, pp);
EVP_PKEY_free(pktmp);
return ret;
}
#endif
#ifndef OPENSSL_NO_DSA
DSA *
d2i_DSA_PUBKEY(DSA **a, const unsigned char **pp, long length)
{
EVP_PKEY *pkey;
DSA *key;
const unsigned char *q;
q = *pp;
pkey = d2i_PUBKEY(NULL, &q, length);
if (!pkey)
return NULL;
key = EVP_PKEY_get1_DSA(pkey);
EVP_PKEY_free(pkey);
if (!key)
return NULL;
*pp = q;
if (a) {
DSA_free(*a);
*a = key;
}
return key;
}
int
i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
{
EVP_PKEY *pktmp;
int ret;
if (!a)
return 0;
pktmp = EVP_PKEY_new();
if (!pktmp) {
ASN1error(ERR_R_MALLOC_FAILURE);
return 0;
}
EVP_PKEY_set1_DSA(pktmp, a);
ret = i2d_PUBKEY(pktmp, pp);
EVP_PKEY_free(pktmp);
return ret;
}
#endif
#ifndef OPENSSL_NO_EC
EC_KEY *
d2i_EC_PUBKEY(EC_KEY **a, const unsigned char **pp, long length)
{
EVP_PKEY *pkey;
EC_KEY *key;
const unsigned char *q;
q = *pp;
pkey = d2i_PUBKEY(NULL, &q, length);
if (!pkey)
return (NULL);
key = EVP_PKEY_get1_EC_KEY(pkey);
EVP_PKEY_free(pkey);
if (!key)
return (NULL);
*pp = q;
if (a) {
EC_KEY_free(*a);
*a = key;
}
return (key);
}
int
i2d_EC_PUBKEY(EC_KEY *a, unsigned char **pp)
{
EVP_PKEY *pktmp;
int ret;
if (!a)
return (0);
if ((pktmp = EVP_PKEY_new()) == NULL) {
ASN1error(ERR_R_MALLOC_FAILURE);
return (0);
}
EVP_PKEY_set1_EC_KEY(pktmp, a);
ret = i2d_PUBKEY(pktmp, pp);
EVP_PKEY_free(pktmp);
return (ret);
}
#endif
int
X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj, int ptype,
void *pval, unsigned char *penc, int penclen)
{
if (!X509_ALGOR_set0(pub->algor, aobj, ptype, pval))
return 0;
if (penc) {
free(pub->public_key->data);
pub->public_key->data = penc;
pub->public_key->length = penclen;
/* Set number of unused bits to zero */
pub->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
pub->public_key->flags |= ASN1_STRING_FLAG_BITS_LEFT;
}
return 1;
}
int
X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg, const unsigned char **pk,
int *ppklen, X509_ALGOR **pa, X509_PUBKEY *pub)
{
if (ppkalg)
*ppkalg = pub->algor->algorithm;
if (pk) {
*pk = pub->public_key->data;
*ppklen = pub->public_key->length;
}
if (pa)
*pa = pub->algor;
return 1;
}