492 lines
12 KiB
C
492 lines
12 KiB
C
/* 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>
|
|
|
|
/* 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)
|
|
{
|
|
int ok=0;
|
|
X509_PUBKEY *pk;
|
|
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);
|
|
a->parameter=ASN1_TYPE_new();
|
|
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);
|
|
i=i2d_DSAparams(dsa,NULL);
|
|
if ((p=(unsigned char *)OPENSSL_malloc(i)) == NULL) goto err;
|
|
pp=p;
|
|
i2d_DSAparams(dsa,&pp);
|
|
a->parameter=ASN1_TYPE_new();
|
|
a->parameter->type=V_ASN1_SEQUENCE;
|
|
a->parameter->value.sequence=ASN1_STRING_new();
|
|
ASN1_STRING_set(a->parameter->value.sequence,p,i);
|
|
OPENSSL_free(p);
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_ECDSA
|
|
else if (pkey->type == EVP_PKEY_ECDSA)
|
|
{
|
|
int nid=0;
|
|
unsigned char *pp;
|
|
ECDSA *ecdsa;
|
|
|
|
ecdsa = pkey->pkey.ecdsa;
|
|
ASN1_TYPE_free(a->parameter);
|
|
|
|
if ((a->parameter = ASN1_TYPE_new()) == NULL)
|
|
{
|
|
X509err(X509_F_X509_PUBKEY_SET, ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if (EC_GROUP_get_asn1_flag(ecdsa->group)
|
|
&& (nid = EC_GROUP_get_nid(ecdsa->group)))
|
|
{
|
|
/* just set the OID */
|
|
a->parameter->type = V_ASN1_OBJECT;
|
|
a->parameter->value.object = OBJ_nid2obj(nid);
|
|
}
|
|
else /* explicit parameters */
|
|
{
|
|
if ((i = i2d_ECDSAParameters(ecdsa, NULL)) == 0)
|
|
{
|
|
X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_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_ECDSAParameters(ecdsa, &pp))
|
|
{
|
|
X509err(X509_F_X509_PUBKEY_SET, ERR_R_ECDSA_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)) 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;
|
|
pk=NULL;
|
|
|
|
ok=1;
|
|
err:
|
|
if (pk != NULL) X509_PUBKEY_free(pk);
|
|
return(ok);
|
|
}
|
|
|
|
EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
|
|
{
|
|
EVP_PKEY *ret=NULL;
|
|
long j;
|
|
int type;
|
|
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_ECDSA
|
|
else if (ret->type == EVP_PKEY_ECDSA)
|
|
{
|
|
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.ecdsa= ECDSA_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_ECDSAParameters(&ret->pkey.ecdsa, &cp, (long)j))
|
|
{
|
|
X509err(X509_F_X509_PUBKEY_GET, ERR_R_ECDSA_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
|
|
*/
|
|
ECDSA *ecdsa;
|
|
if (ret->pkey.ecdsa == NULL)
|
|
ret->pkey.ecdsa = ECDSA_new();
|
|
ecdsa = ret->pkey.ecdsa;
|
|
if (ecdsa->group)
|
|
EC_GROUP_free(ecdsa->group);
|
|
if ((ecdsa->group = EC_GROUP_new_by_name(
|
|
OBJ_obj2nid(a->parameter->value.object))) == NULL)
|
|
goto err;
|
|
EC_GROUP_set_asn1_flag(ecdsa->group,
|
|
OPENSSL_EC_NAMED_CURVE);
|
|
}
|
|
/* the case implicitlyCA is currently not implemented */
|
|
ret->save_parameters = 1;
|
|
}
|
|
#endif
|
|
|
|
p=key->public_key->data;
|
|
j=key->public_key->length;
|
|
if ((ret = d2i_PublicKey(type, &ret, &p, (long)j)) == NULL)
|
|
{
|
|
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, 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, unsigned char **pp,
|
|
long length)
|
|
{
|
|
EVP_PKEY *pkey;
|
|
RSA *key;
|
|
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, unsigned char **pp,
|
|
long length)
|
|
{
|
|
EVP_PKEY *pkey;
|
|
DSA *key;
|
|
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_ECDSA
|
|
ECDSA *d2i_ECDSA_PUBKEY(ECDSA **a, unsigned char **pp, long length)
|
|
{
|
|
EVP_PKEY *pkey;
|
|
ECDSA *key;
|
|
unsigned char *q;
|
|
q = *pp;
|
|
pkey = d2i_PUBKEY(NULL, &q, length);
|
|
if (!pkey) return(NULL);
|
|
key = EVP_PKEY_get1_ECDSA(pkey);
|
|
EVP_PKEY_free(pkey);
|
|
if (!key) return(NULL);
|
|
*pp = q;
|
|
if (a)
|
|
{
|
|
ECDSA_free(*a);
|
|
*a = key;
|
|
}
|
|
return(key);
|
|
}
|
|
|
|
int i2d_ECDSA_PUBKEY(ECDSA *a, unsigned char **pp)
|
|
{
|
|
EVP_PKEY *pktmp;
|
|
int ret;
|
|
if (!a) return(0);
|
|
if ((pktmp = EVP_PKEY_new()) == NULL)
|
|
{
|
|
ASN1err(ASN1_F_I2D_ECDSA_PUBKEY, ERR_R_MALLOC_FAILURE);
|
|
return(0);
|
|
}
|
|
EVP_PKEY_set1_ECDSA(pktmp, a);
|
|
ret = i2d_PUBKEY(pktmp, pp);
|
|
EVP_PKEY_free(pktmp);
|
|
return(ret);
|
|
}
|
|
#endif
|