pineapple-src/externals/libressl/crypto/asn1/x_pubkey.c
2022-04-24 22:29:35 +02:00

743 lines
16 KiB
C
Executable file

/* $OpenBSD: x_pubkey.c,v 1.31 2021/12/25 13:17:48 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"
#include "evp_locl.h"
#include "x509_lcl.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;
}
/*
* Decode an X509_PUBKEY into the specified key type.
*/
static int
pubkey_ex_d2i(int pkey_type, ASN1_VALUE **pval, const unsigned char **in,
long len, const ASN1_ITEM *it)
{
const ASN1_EXTERN_FUNCS *ef = it->funcs;
const unsigned char *p = *in;
X509_PUBKEY *xpk = NULL;
ASN1_VALUE *key = NULL;
EVP_PKEY *pkey = NULL;
int ret = 0;
if ((xpk = d2i_X509_PUBKEY(NULL, &p, len)) == NULL)
goto err;
if ((pkey = X509_PUBKEY_get(xpk)) == NULL)
goto err;
switch (pkey_type) {
case EVP_PKEY_NONE:
key = (ASN1_VALUE *)pkey;
pkey = NULL;
break;
case EVP_PKEY_DSA:
key = (ASN1_VALUE *)EVP_PKEY_get1_DSA(pkey);
break;
case EVP_PKEY_RSA:
key = (ASN1_VALUE *)EVP_PKEY_get1_RSA(pkey);
break;
case EVP_PKEY_EC:
key = (ASN1_VALUE *)EVP_PKEY_get1_EC_KEY(pkey);
break;
default:
goto err;
}
if (key == NULL)
goto err;
ef->asn1_ex_free(pval, it);
*pval = key;
*in = p;
ret = 1;
err:
EVP_PKEY_free(pkey);
X509_PUBKEY_free(xpk);
return ret;
}
/*
* Encode the specified key type into an X509_PUBKEY.
*/
static int
pubkey_ex_i2d(int pkey_type, ASN1_VALUE **pval, unsigned char **out,
const ASN1_ITEM *it)
{
X509_PUBKEY *xpk = NULL;
EVP_PKEY *pkey, *pktmp;
int ret = -1;
if ((pkey = pktmp = EVP_PKEY_new()) == NULL)
goto err;
switch (pkey_type) {
case EVP_PKEY_NONE:
pkey = (EVP_PKEY *)*pval;
break;
case EVP_PKEY_DSA:
if (!EVP_PKEY_set1_DSA(pkey, (DSA *)*pval))
goto err;
break;
case EVP_PKEY_RSA:
if (!EVP_PKEY_set1_RSA(pkey, (RSA *)*pval))
goto err;
break;
case EVP_PKEY_EC:
if (!EVP_PKEY_set1_EC_KEY(pkey, (EC_KEY*)*pval))
goto err;
break;
default:
goto err;
}
if (!X509_PUBKEY_set(&xpk, pkey))
goto err;
ret = i2d_X509_PUBKEY(xpk, out);
err:
EVP_PKEY_free(pktmp);
X509_PUBKEY_free(xpk);
return ret;
}
static int
pkey_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
if ((*pval = (ASN1_VALUE *)EVP_PKEY_new()) == NULL)
return 0;
return 1;
}
static void
pkey_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
EVP_PKEY_free((EVP_PKEY *)*pval);
*pval = NULL;
}
static int
pkey_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
return pubkey_ex_d2i(EVP_PKEY_NONE, pval, in, len, it);
}
static int
pkey_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
int tag, int aclass)
{
return pubkey_ex_i2d(EVP_PKEY_NONE, pval, out, it);
}
const ASN1_EXTERN_FUNCS pkey_pubkey_asn1_ff = {
.app_data = NULL,
.asn1_ex_new = pkey_pubkey_ex_new,
.asn1_ex_free = pkey_pubkey_ex_free,
.asn1_ex_clear = NULL,
.asn1_ex_d2i = pkey_pubkey_ex_d2i,
.asn1_ex_i2d = pkey_pubkey_ex_i2d,
.asn1_ex_print = NULL,
};
const ASN1_ITEM EVP_PKEY_PUBKEY_it = {
.itype = ASN1_ITYPE_EXTERN,
.utype = 0,
.templates = NULL,
.tcount = 0,
.funcs = &pkey_pubkey_asn1_ff,
.size = 0,
.sname = NULL,
};
EVP_PKEY *
d2i_PUBKEY(EVP_PKEY **pkey, const unsigned char **in, long len)
{
return (EVP_PKEY *)ASN1_item_d2i((ASN1_VALUE **)pkey, in, len,
&EVP_PKEY_PUBKEY_it);
}
int
i2d_PUBKEY(EVP_PKEY *pkey, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)pkey, out, &EVP_PKEY_PUBKEY_it);
}
EVP_PKEY *
d2i_PUBKEY_bio(BIO *bp, EVP_PKEY **pkey)
{
return (EVP_PKEY *)ASN1_item_d2i_bio(&EVP_PKEY_PUBKEY_it, bp,
(ASN1_VALUE **)pkey);
}
int
i2d_PUBKEY_bio(BIO *bp, EVP_PKEY *pkey)
{
return ASN1_item_i2d_bio(&EVP_PKEY_PUBKEY_it, bp, (ASN1_VALUE *)pkey);
}
EVP_PKEY *
d2i_PUBKEY_fp(FILE *fp, EVP_PKEY **pkey)
{
return (EVP_PKEY *)ASN1_item_d2i_fp(&EVP_PKEY_PUBKEY_it, fp,
(ASN1_VALUE **)pkey);
}
int
i2d_PUBKEY_fp(FILE *fp, EVP_PKEY *pkey)
{
return ASN1_item_i2d_fp(&EVP_PKEY_PUBKEY_it, fp, (ASN1_VALUE *)pkey);
}
/*
* The following are equivalents but which return RSA and DSA keys.
*/
#ifndef OPENSSL_NO_RSA
static int
rsa_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
if ((*pval = (ASN1_VALUE *)RSA_new()) == NULL)
return 0;
return 1;
}
static void
rsa_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
RSA_free((RSA *)*pval);
*pval = NULL;
}
static int
rsa_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
return pubkey_ex_d2i(EVP_PKEY_RSA, pval, in, len, it);
}
static int
rsa_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
int tag, int aclass)
{
return pubkey_ex_i2d(EVP_PKEY_RSA, pval, out, it);
}
const ASN1_EXTERN_FUNCS rsa_pubkey_asn1_ff = {
.app_data = NULL,
.asn1_ex_new = rsa_pubkey_ex_new,
.asn1_ex_free = rsa_pubkey_ex_free,
.asn1_ex_clear = NULL,
.asn1_ex_d2i = rsa_pubkey_ex_d2i,
.asn1_ex_i2d = rsa_pubkey_ex_i2d,
.asn1_ex_print = NULL,
};
const ASN1_ITEM RSA_PUBKEY_it = {
.itype = ASN1_ITYPE_EXTERN,
.utype = 0,
.templates = NULL,
.tcount = 0,
.funcs = &rsa_pubkey_asn1_ff,
.size = 0,
.sname = NULL,
};
RSA *
d2i_RSA_PUBKEY(RSA **rsa, const unsigned char **in, long len)
{
return (RSA *)ASN1_item_d2i((ASN1_VALUE **)rsa, in, len,
&RSA_PUBKEY_it);
}
int
i2d_RSA_PUBKEY(RSA *rsa, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)rsa, out, &RSA_PUBKEY_it);
}
RSA *
d2i_RSA_PUBKEY_bio(BIO *bp, RSA **rsa)
{
return (RSA *)ASN1_item_d2i_bio(&RSA_PUBKEY_it, bp, (ASN1_VALUE **)rsa);
}
int
i2d_RSA_PUBKEY_bio(BIO *bp, RSA *rsa)
{
return ASN1_item_i2d_bio(&RSA_PUBKEY_it, bp, (ASN1_VALUE *)rsa);
}
RSA *
d2i_RSA_PUBKEY_fp(FILE *fp, RSA **rsa)
{
return (RSA *)ASN1_item_d2i_fp(&RSA_PUBKEY_it, fp, (ASN1_VALUE **)rsa);
}
int
i2d_RSA_PUBKEY_fp(FILE *fp, RSA *rsa)
{
return ASN1_item_i2d_fp(&RSA_PUBKEY_it, fp, (ASN1_VALUE *)rsa);
}
#endif
#ifndef OPENSSL_NO_DSA
static int
dsa_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
if ((*pval = (ASN1_VALUE *)DSA_new()) == NULL)
return 0;
return 1;
}
static void
dsa_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
DSA_free((DSA *)*pval);
*pval = NULL;
}
static int
dsa_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
return pubkey_ex_d2i(EVP_PKEY_DSA, pval, in, len, it);
}
static int
dsa_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
int tag, int aclass)
{
return pubkey_ex_i2d(EVP_PKEY_DSA, pval, out, it);
}
const ASN1_EXTERN_FUNCS dsa_pubkey_asn1_ff = {
.app_data = NULL,
.asn1_ex_new = dsa_pubkey_ex_new,
.asn1_ex_free = dsa_pubkey_ex_free,
.asn1_ex_clear = NULL,
.asn1_ex_d2i = dsa_pubkey_ex_d2i,
.asn1_ex_i2d = dsa_pubkey_ex_i2d,
.asn1_ex_print = NULL,
};
const ASN1_ITEM DSA_PUBKEY_it = {
.itype = ASN1_ITYPE_EXTERN,
.utype = 0,
.templates = NULL,
.tcount = 0,
.funcs = &dsa_pubkey_asn1_ff,
.size = 0,
.sname = NULL,
};
DSA *
d2i_DSA_PUBKEY(DSA **dsa, const unsigned char **in, long len)
{
return (DSA *)ASN1_item_d2i((ASN1_VALUE **)dsa, in, len,
&DSA_PUBKEY_it);
}
int
i2d_DSA_PUBKEY(DSA *dsa, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)dsa, out, &DSA_PUBKEY_it);
}
DSA *
d2i_DSA_PUBKEY_bio(BIO *bp, DSA **dsa)
{
return (DSA *)ASN1_item_d2i_bio(&DSA_PUBKEY_it, bp, (ASN1_VALUE **)dsa);
}
int
i2d_DSA_PUBKEY_bio(BIO *bp, DSA *dsa)
{
return ASN1_item_i2d_bio(&DSA_PUBKEY_it, bp, (ASN1_VALUE *)dsa);
}
DSA *
d2i_DSA_PUBKEY_fp(FILE *fp, DSA **dsa)
{
return (DSA *)ASN1_item_d2i_fp(&DSA_PUBKEY_it, fp, (ASN1_VALUE **)dsa);
}
int
i2d_DSA_PUBKEY_fp(FILE *fp, DSA *dsa)
{
return ASN1_item_i2d_fp(&DSA_PUBKEY_it, fp, (ASN1_VALUE *)dsa);
}
#endif
#ifndef OPENSSL_NO_EC
static int
ec_pubkey_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
if ((*pval = (ASN1_VALUE *)EC_KEY_new()) == NULL)
return 0;
return 1;
}
static void
ec_pubkey_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
EC_KEY_free((EC_KEY *)*pval);
*pval = NULL;
}
static int
ec_pubkey_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
const ASN1_ITEM *it, int tag, int aclass, char opt, ASN1_TLC *ctx)
{
return pubkey_ex_d2i(EVP_PKEY_EC, pval, in, len, it);
}
static int
ec_pubkey_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it,
int tag, int aclass)
{
return pubkey_ex_i2d(EVP_PKEY_EC, pval, out, it);
}
const ASN1_EXTERN_FUNCS ec_pubkey_asn1_ff = {
.app_data = NULL,
.asn1_ex_new = ec_pubkey_ex_new,
.asn1_ex_free = ec_pubkey_ex_free,
.asn1_ex_clear = NULL,
.asn1_ex_d2i = ec_pubkey_ex_d2i,
.asn1_ex_i2d = ec_pubkey_ex_i2d,
.asn1_ex_print = NULL,
};
const ASN1_ITEM EC_PUBKEY_it = {
.itype = ASN1_ITYPE_EXTERN,
.utype = 0,
.templates = NULL,
.tcount = 0,
.funcs = &ec_pubkey_asn1_ff,
.size = 0,
.sname = NULL,
};
EC_KEY *
d2i_EC_PUBKEY(EC_KEY **ec, const unsigned char **in, long len)
{
return (EC_KEY *)ASN1_item_d2i((ASN1_VALUE **)ec, in, len,
&EC_PUBKEY_it);
}
int
i2d_EC_PUBKEY(EC_KEY *ec, unsigned char **out)
{
return ASN1_item_i2d((ASN1_VALUE *)ec, out, &EC_PUBKEY_it);
}
EC_KEY *
d2i_EC_PUBKEY_bio(BIO *bp, EC_KEY **ec)
{
return (EC_KEY *)ASN1_item_d2i_bio(&EC_PUBKEY_it, bp, (ASN1_VALUE **)ec);
}
int
i2d_EC_PUBKEY_bio(BIO *bp, EC_KEY *ec)
{
return ASN1_item_i2d_bio(&EC_PUBKEY_it, bp, (ASN1_VALUE *)ec);
}
EC_KEY *
d2i_EC_PUBKEY_fp(FILE *fp, EC_KEY **ec)
{
return (EC_KEY *)ASN1_item_d2i_fp(&EC_PUBKEY_it, fp, (ASN1_VALUE **)ec);
}
int
i2d_EC_PUBKEY_fp(FILE *fp, EC_KEY *ec)
{
return ASN1_item_i2d_fp(&EC_PUBKEY_it, fp, (ASN1_VALUE *)ec);
}
#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;
}