/* crypto/asn1/x_pubkey.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/asn1t.h>
#include <openssl/x509.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
/* Minor tweak to operation: free up EVP_PKEY */
static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
{
if (operation == ASN1_OP_FREE_POST)
{
X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
EVP_PKEY_free(pubkey->pkey);
}
return 1;
}
ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
{
X509_PUBKEY *pk=NULL;
X509_ALGOR *a;
ASN1_OBJECT *o;
unsigned char *s,*p = NULL;
int i;
if (x == NULL) return(0);
if ((pk=X509_PUBKEY_new()) == NULL) goto err;
a=pk->algor;
/* set the algorithm id */
if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
ASN1_OBJECT_free(a->algorithm);
a->algorithm=o;
/* Set the parameter list */
if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
{
if ((a->parameter == NULL) ||
(a->parameter->type != V_ASN1_NULL))
{
ASN1_TYPE_free(a->parameter);
if (!(a->parameter=ASN1_TYPE_new()))
{
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
a->parameter->type=V_ASN1_NULL;
}
}
#ifndef OPENSSL_NO_DSA
else if (pkey->type == EVP_PKEY_DSA)
{
unsigned char *pp;
DSA *dsa;
dsa=pkey->pkey.dsa;
dsa->write_params=0;
ASN1_TYPE_free(a->parameter);
if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
goto err;
if (!(p=(unsigned char *)OPENSSL_malloc(i)))
{
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
pp=p;
i2d_DSAparams(dsa,&pp);
if (!(a->parameter=ASN1_TYPE_new()))
{
OPENSSL_free(p);
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
a->parameter->type=V_ASN1_SEQUENCE;
if (!(a->parameter->value.sequence=ASN1_STRING_new()))
{
OPENSSL_free(p);
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
{
OPENSSL_free(p);
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
OPENSSL_free(p);
}
#endif
#ifndef OPENSSL_NO_EC
else if (pkey->type == EVP_PKEY_EC)
{
int nid=0;
unsigned char *pp;
EC_KEY *ec_key;
const EC_GROUP *group;
ec_key = pkey->pkey.ec;
ASN1_TYPE_free(a->parameter);
if ((a->parameter = ASN1_TYPE_new()) == NULL)
{
X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
goto err;
}
group = EC_KEY_get0_group(ec_key);
if (EC_GROUP_get_asn1_flag(group)
&& (nid = EC_GROUP_get_curve_name(group)))
{
/* just set the OID */
a->parameter->type = V_ASN1_OBJECT;
a->parameter->value.object = OBJ_nid2obj(nid);
}
else /* explicit parameters */
{
if ((i = i2d_ECParameters(ec_key, NULL)) == 0)
{
X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
goto err;
}
if ((p = (unsigned char *) OPENSSL_malloc(i)) == NULL)
{
X509err(X509_F_X509_PUBKEY_SET, ERR_R_MALLOC_FAILURE);
goto err;
}
pp = p;
if (!i2d_ECParameters(ec_key, &pp))
{
X509err(X509_F_X509_PUBKEY_SET, ERR_R_EC_LIB);
OPENSSL_free(p);
goto err;
}
a->parameter->type = V_ASN1_SEQUENCE;
if ((a->parameter->value.sequence = ASN1_STRING_new()) == NULL)
{
X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
OPENSSL_free(p);
goto err;
}
ASN1_STRING_set(a->parameter->value.sequence, p, i);
OPENSSL_free(p);
}
}
#endif
else if (1)
{
X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
goto err;
}
if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
{
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
p=s;
i2d_PublicKey(pkey,&p);
if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
{
X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
goto err;
}
/* Set number of unused bits to zero */
pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
OPENSSL_free(s);
#if 0
CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
pk->pkey=pkey;
#endif
if (*x != NULL)
X509_PUBKEY_free(*x);
*x=pk;
return 1;
err:
if (pk != NULL) X509_PUBKEY_free(pk);
return 0;
}
EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
{
EVP_PKEY *ret=NULL;
long j;
int type;
const unsigned char *p;
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
const unsigned char *cp;
X509_ALGOR *a;
#endif
if (key == NULL) goto err;
if (key->pkey != NULL)
{
CRYPTO_add(&key->pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);
return(key->pkey);
}
if (key->public_key == NULL) goto err;
type=OBJ_obj2nid(key->algor->algorithm);
if ((ret = EVP_PKEY_new()) == NULL)
{
X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
goto err;
}
ret->type = EVP_PKEY_type(type);
/* the parameters must be extracted before the public key (ECDSA!) */
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
a=key->algor;
#endif
if (0)
;
#ifndef OPENSSL_NO_DSA
else if (ret->type == EVP_PKEY_DSA)
{
if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
{
if ((ret->pkey.dsa = DSA_new()) == NULL)
{
X509err(X509_F_X509_PUBKEY_GET, ERR_R_MALLOC_FAILURE);
goto err;
}
ret->pkey.dsa->write_params=0;
cp=p=a->parameter->value.sequence->data;
j=a->parameter->value.sequence->length;
if (!d2i_DSAparams(&ret->pkey.dsa, &cp, (long)j))
goto err;
}
ret->save_parameters=1;
}
#endif
#ifndef OPENSSL_NO_EC
else if (ret->type == EVP_PKEY_EC)
{
if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
{
/* type == V_ASN1_SEQUENCE => we have explicit parameters
* (e.g. parameters in the X9_62_EC_PARAMETERS-structure )
*/
if ((ret->pkey.ec= EC_KEY_new()) == NULL)
{
X509err(X509_F_X509_PUBKEY_GET,
ERR_R_MALLOC_FAILURE);
goto err;
}
cp = p = a->parameter->value.sequence->data;
j = a->parameter->value.sequence->length;
if (!d2i_ECParameters(&ret->pkey.ec, &cp, (long)j))
{
X509err(X509_F_X509_PUBKEY_GET, ERR_R_EC_LIB);
goto err;
}
}
else if (a->parameter && (a->parameter->type == V_ASN1_OBJECT))
{
/* type == V_ASN1_OBJECT => the parameters are given
* by an asn1 OID
*/
EC_KEY *ec_key;
EC_GROUP *group;
if (ret->pkey.ec == NULL)
ret->pkey.ec = EC_KEY_new();
ec_key = ret->pkey.ec;
if (ec_key == NULL)
goto err;
group = EC_GROUP_new_by_curve_name(OBJ_obj2nid(a->parameter->value.object));
if (group == NULL)
goto err;
EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
if (EC_KEY_set_group(ec_key, group) == 0)
goto err;
EC_GROUP_free(group);
}
/* the case implicitlyCA is currently not implemented */
ret->save_parameters = 1;
}
#endif
p=key->public_key->data;
j=key->public_key->length;
if (!d2i_PublicKey(type, &ret, &p, (long)j))
{
X509err(X509_F_X509_PUBKEY_GET, X509_R_ERR_ASN1_LIB);
goto err;
}
key->pkey = ret;
CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_EVP_PKEY);
return(ret);
err:
if (ret != NULL)
EVP_PKEY_free(ret);
return(NULL);
}
/* 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)
{
ASN1err(ASN1_F_I2D_RSA_PUBKEY, 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)
{
ASN1err(ASN1_F_I2D_DSA_PUBKEY, 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)
{
ASN1err(ASN1_F_I2D_EC_PUBKEY, 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